Drilling machine for high-precision gear machining

Abstract

The invention relates to the technical field of drilling machines, in particular to a high-precision drilling machine for gear machining, which comprises a drilling machine frame, a drilling seat chassis, positioning components and a gear positioning piece, a drilling tool is mounted on the drilling machine frame, the drilling seat chassis is fixedly mounted on the drilling machine frame, and three identical positioning components are circumferentially distributed on the drilling seat chassis. And gear positioning pieces are installed on the three positioning assemblies, the positioning assemblies fix a gear to the drill seat chassis, and when the gear is installed, the positioning assemblies drive the gear positioning pieces to move and be inserted into gaps of gear teeth of the gear. The positioning assembly is used for fixing the gear, the situation that when a drilling machine is used for drilling the gear, positioning is not accurate or clamping is not stable, a through hole machined in the gear by the drilling machine inclines, and the accuracy of gear transmission is directly influenced is avoided, and the stability and reliability of gear transmission after gear drilling are guaranteed.

Description

Technical Field

[0001] The invention relates to the technical field of drilling machines, in particular to a drilling machine for high-precision gear processing. Background Art

[0002] Gears are one of the most commonly used mechanical parts in mechanical equipment. Gears exist in almost every mechanical equipment. Gears have various shapes. Power can be transmitted through the rotation of gears and the meshing with other gears or racks. Gears are mostly made of metal materials, and many of them have multiple through holes. Gears with multiple holes can not only reduce the weight of the gears, but also facilitate the assembly of the gears, and are easy to install and disassemble with tools. When the surface of the metal gear needs to be heat treated, the metal will deform during heat treatment. By opening through holes, stress can be eliminated during heat treatment, and the through holes on the gears can block vibration, thereby reducing noise. A drilling machine refers to a machine tool that mainly uses a drill to process holes on the workpiece. Usually, the rotation of the drill bit is the main motion, and the axial movement of the drill bit is the feed motion. The drilling machine has a simple structure and can drill through holes, blind holes, replace special tools, expand, countersink, ream holes or perform tapping and other processing. During the processing, the workpiece does not move, the tool moves, the tool center is aligned with the hole center, the tool rotates, and feeds along the spindle direction. The operation can be manual or motorized. When using a drilling machine to drill gears, positioning and clamping the gears is one of the key steps. If the positioning is inaccurate or the clamping is unstable, the gear through hole will be tilted, which will directly affect the accuracy and reliability of the gear transmission. Different fixtures are required for gears with different numbers of teeth to clamp the gears on the drilling machine.

[0003] In order to avoid inaccurate positioning or unstable clamping when drilling gears with a drilling machine, which may affect the accuracy and reliability of gear transmission, the invention patent with application number CN202210017269.5 provides a gear drilling machine that is beneficial to improving processing accuracy. The invention is provided by setting a drilling tool and a frame for driving the drilling tool to adjust the position, and a drill seat is provided in the drilling preparation area below the drilling tool. A positioning query component is arranged on the drill seat for circular sliding, and the positioning center of the positioning query component always points to the center of the drill seat. A holding drive component is provided on the drill seat, and the power end of the holding drive component is connected to the positioning query component. The positioning query component drives the gear on the drill seat to rotate back and forth to find the tooth groove in the area near the gear. After finding the gear tooth groove, the holding drive component positions the positioning query component and presses the positioning query component in the gear tooth groove. The use of a holding drive assembly improves the gear processing clamping efficiency, and the positioning query assembly allows the gear tooth gap to be accurately positioned and the gear center to be accurately positioned. However, the positioning query assembly uses a positioning guide cylinder to fix it, which is only applicable to spur gears and cannot accurately clamp and position gears with various tooth shapes and different numbers of teeth.

[0004] Therefore, in order to avoid the situation that the drilling machine is not positioned correctly or the clamping is not stable when drilling the gear, which may affect the accuracy and reliability of the gear transmission, a high-precision gear processing drilling machine is proposed. Summary of the invention

[0005] The object of the present invention is to provide a drilling machine for high-precision gear processing. In order to prevent the through hole processed by the drilling machine from tilting due to inaccurate positioning or unstable clamping when the drilling machine is used to drill holes in the gears, which directly affects the accuracy of the gear transmission, a positioning component is arranged on the drilling machine frame, and a gear positioning piece is installed in the positioning component. The positioning component preliminarily positions the three arc surfaces of the circular outer contour of the gear to limit the movement of the gear in the horizontal direction, and then the gear positioning piece is inserted into the gap between the gear teeth to clamp the gear teeth from three directions to limit the rotation of the gear, thereby completing the positioning and clamping of the gear, avoiding the situation that the gear is inaccurately positioned or unstable clamping during the drilling process, and ensuring the stability and reliability of the gear transmission after the gear drilling process.

[0006] To achieve the above object, the present invention provides the following technical solutions:

[0007] A drilling machine for high-precision gear processing comprises a drilling machine frame, a drill seat chassis, a positioning assembly, and a gear positioning plate. A drilling tool is installed on the drilling machine frame, and the drilling tool can be limited and moved in the horizontal and vertical directions. The drill seat chassis is fixedly installed on the drilling machine frame, and the drill seat chassis is located below the drilling tool. Three identical positioning assemblies are circumferentially installed on the drill seat chassis, and gear positioning plates are installed on the three positioning assemblies. The positioning assembly fixes the gear to be drilled on the drill seat chassis. When the gear is installed, the positioning assembly drives the gear positioning plate to move in the horizontal direction, and the gear positioning plate is inserted into the gap between the gear teeth.

[0008] By installing three identical positioning components on the drill base chassis in a circumferential distribution, with the angle between each positioning component being 60°, when preparing to drill the gear, first adjust the position of the drilling tool on the drilling machine frame so that the drilling tool is aligned with the center of the drill base chassis above the drill base chassis, and then install the gear from the drill base chassis to the drill base chassis. When the gear surface is about to fit with the drill base chassis, the tooth surface of the gear first slides relative to the positioning component, and the positioning component first performs preliminary positioning on the three arc surfaces of the circular outer contour of the gear. As the gear continues to move downward, it is pressed against the side wall by the positioning component and cannot move horizontally. Move upward, and the gear tooth surface and the positioning component slide relative to each other, and the gear positioning piece extends from the positioning component, and the gear positioning piece is inserted into the gap between the gear teeth, clamping the gear teeth from three directions to limit the rotation of the gear. After completing the positioning and clamping of the gear, start the drilling tool on the drilling machine frame to make the drilling tool move downward in the main axis direction to drill the gear, so as to avoid inaccurate positioning or unstable clamping when using the drilling machine to drill the gear, which may cause the through hole machined by the drilling machine to tilt, directly affecting the accuracy of the gear transmission, and ensuring the stability and reliability of the gear transmission after the gear drilling process is completed.

[0009] Preferably, the positioning assembly includes a rotating frame, an arc plate, a rotating connecting rod, a thrust spring, and a horizontal slide seat, the bottom of the rotating frame is fitted with the upper surface of the drill seat chassis, and two arc plates are symmetrically arranged on the rotating frame, and the upper parts of the two arc plates are rotatably installed in the rotating frame, and two spring support plates are symmetrically installed in the rotating frame. One end of the thrust spring is connected to the spring support plate, and the other end is connected to the lower half of the arc plate. The arc plate is pushed out of the rotating frame by the thrust spring and is in an inclined state. The horizontal slide seat is installed inside the rotating frame and is located between the two arc plates. The gear positioning plate is installed on the horizontal slide seat, and two supporting round rods are symmetrically installed inside the rotating frame. Two rotating connecting rods are symmetrically arranged between the two arc plates, the lower ends of the two rotating connecting rods are rotatably connected to the side wall of the bottom of the arc plate, the middle parts of the two rotating connecting rods are rotatably installed on the supporting round rods, and the upper ends of the two rotating connecting rods are rotatably connected to the side wall of the horizontal slide seat.

[0010] The arc plate is installed on the rotating frame by rotation, and the side wall of the arc plate is fitted with the inner wall of the rotating frame. When the gear is pressed down from the top of the drill seat chassis for installation, the tooth surface of the gear first contacts the side surface of the upper part of the arc plate. In the process of the gear being continuously pressed downward, the gear and the side surface of the arc plate slide relative to each other and also squeeze the arc plate, so that the arc plate is limited and rotated toward the direction of the spring support plate. The inclination angle between the arc plate and the rotating frame changes from large to small, and the thrust spring is gradually compressed. The rotating connecting rod is divided into a bottom connecting rod and an inclined connecting rod. One end of the bottom connecting rod is rotatably connected to the bottom of the side wall of the arc plate, and the connection position is lower than the rotating connection between the arc plate and the rotating frame. The other end of the bottom connecting rod faces the inside of the rotating frame, and this end is rotatably connected to the bottom end of the inclined connecting rod. When the gear is not installed, the angle between the bottom connecting rod and the inclined connecting rod is an obtuse angle, and the middle part of the inclined connecting rod rotates with the supporting round rod. The upper side wall of the inclined connecting rod is rotatably connected with the side wall of the horizontal slide, and the position of the supporting round rod is between the two rotating connection points. When the gear is pressed downward and the arc plate rotates within a limited position, the arc plate drives the bottom connecting rod to move toward the direction of the spring support plate. Under the limiting action of the supporting round rod, the inclined connecting rod rotates with the supporting round rod as the axis, and the angle between the bottom connecting rod and the inclined connecting rod becomes an acute angle. When the inclined connecting rod rotates, it drives the horizontal slide to move toward the gear direction, and the gear positioning piece installed on the horizontal slide moves with the horizontal slide. The gear positioning piece is inserted into the gap between the gear teeth, clamping the gear teeth from three directions to limit the rotation of the gear, and fixing the gear on the drill seat chassis by pressing. When drilling the gear, it is convenient for the staff to clamp the gear quickly and accurately on the drilling machine frame, thereby increasing the convenience of using the device and improving the efficiency of gear drilling.

[0011] Preferably, one end of the gear positioning plate is set to a triangle, and a smooth chamfer is provided on the triangle. A cylindrical long rod is fixedly installed on the other end of the gear positioning plate. A circular through hole is provided on the horizontal slide seat. The cylindrical long rod and the circular through hole are rotatably and slidably matched. When the gear positioning plate is inserted into the inclined gear tooth gap, the cylindrical long rod rotates.

[0012] By fixing one end of the gear positioning piece with a cylindrical long rod, the radius cross-section of the cylindrical long rod between the circular through hole and the gear positioning piece is larger than the circular through hole, so that the horizontal slide can drive the gear positioning piece to move in one direction, and one end of the gear positioning piece is set to a triangle, and a smooth chamfer is provided on the triangle. When the gear and the arc plate slide relative to each other, the gear positioning piece extends from the rotating frame, and the top of the triangular end of the gear positioning piece first contacts the gap between the gear teeth. If the gear tooth profile is a straight tooth, the gear positioning piece remains in a vertical state and is inserted into the gap between the gear teeth to limit the gear. If the gear tooth profile is a helical tooth, the gear positioning piece will rotate, driving the cylindrical long rod to rotate in the circular through hole. After the gear positioning piece rotates to adapt to the inclination angle of the helical gear teeth, the gap between the gear teeth is clamped. The gear positioning piece can limit and fix gears with different modules and tooth shapes, thereby improving the adaptability of the positioning component.

[0013] Preferably, a circular slide groove is provided on the drill seat chassis, and the circular slide groove is located below the arc plate. An arc-shaped slider is installed at the bottom of the rotating frame, and the arc-shaped slider slides in cooperation with the circular slide groove, and the height of the arc-shaped slider is equal to the depth of the circular slide groove.

[0014] By opening a circular groove on the drill base chassis, the height of the arc-shaped slider is equal to the depth of the circular groove, ensuring that the lower bottom surface of the rotating frame fits with the upper surface of the drill base chassis, and the rotating frame can rotate on the drill base chassis. When the gear is pressed down on the drill base chassis, the gear positioning piece may first contact the gear teeth, resulting in the gear positioning piece being unable to be inserted into the gear tooth gap. At this time, the rotating frame will rotate slightly on the drill base chassis, causing the gear positioning piece to be slightly offset and inserted into the gear tooth gap, further improving the adaptability of the positioning component.

[0015] Preferably, a holding plate is fixedly mounted on the horizontal slide, a sliding groove is opened on the rotating frame, the holding plate is located in the sliding groove and fits against the inner wall of the sliding groove, and when the gear positioning plate is inserted into the gear tooth gap, the horizontal slide drives the holding plate and the gear positioning plate to move in the same direction.

[0016] By fixing the holding plate on the horizontal slide, when the gear is pressed into the drill seat chassis, the side wall of the arc plate fits with the gear tooth surface, and the horizontal slide drives the holding plate to move toward the gear. The holding plate and the sliding groove slide relative to each other, and finally the holding plate is located above the gear, limiting the vertical movement of the gear and improving the stability of the device.

[0017] Preferably, a circular hole is provided on the side wall of the rotating frame, and one end of the cylindrical long rod passes through the circular hole. The radius of the circular hole is larger than that of the cylindrical long rod. A clamping groove is provided on the circular hole, and clamping plates are distributed circumferentially in the clamping groove. The clamping plates are made of rubber material. Two rectangular plates are symmetrically installed on the end of the cylindrical long rod. The spacing between each clamping plate is smaller than the width of the rectangular plate. After the gear positioning plate is inserted into the gear tooth gap, the rectangular plate is inserted into the clamping groove.

[0018] By setting the radius of the circular hole to be larger than the radius of the cylindrical long rod, when the rotating connecting rod drives the horizontal slide to move, the horizontal slide will also move slightly in the vertical direction, and the cylindrical long rod can move in the vertical direction of the circular hole to avoid interference with the device. During the gear press installation process, when the gear locating plate is inserted into the gear tooth gap, the rectangular plate will also be inserted into the clamping groove. The clamping plate limits the rotation of the cylindrical long rod to avoid the gear locating plate from rotating after the limit clamping is completed, thereby improving the stability of the gear locating plate limit clamping and the positioning accuracy.

[0019] Preferably, limit plates are provided on both sides of each rotating frame, the limit plates are vertically fixedly mounted on the drill base chassis, and limit springs are fixedly mounted on the side walls of the limit plates, and the other ends of the limit springs are connected to the side walls of the rotating frame.

[0020] By setting limit plates on both sides of the rotating frame and using limit springs to connect the limit plates to the side walls of the rotating frame, the rotating frame can be prevented from continuously rotating or excessively rotating on the drill seat bottom plate, the relative distance of each positioning component can be ensured, so that the positioning component clamps the gear, further improving the stability of the positioning component.

[0021] Preferably, a rectangular slide rail is provided in the rotating frame, the rectangular slide rail is parallel to the inner wall of the rotating frame, the bottom of the rectangular slide rail is in contact with the upper surface of the drill base chassis, a support spring is fixedly installed on the bottom of the horizontal slide seat, the other end of the support spring is fixedly connected to a square slider, the square slider is located inside the rectangular slide rail, and slides with the rectangular slide rail.

[0022] By installing a support spring at the bottom of the horizontal slide, the square slider slides in cooperation with the rectangular slide rail. When the horizontal slide moves, the square slider moves with the horizontal slide in the rectangular slide rail. The support spring provides an upward support force for the horizontal slide, making the horizontal slide more stable and smooth to drive the movement of the gear positioning plate, thereby further improving the stability of the gear positioning plate.

[0023] Compared with the prior art, the present invention has the following beneficial effects:

[0024] 1. Use the positioning assembly to preliminarily position the three arc surfaces of the circular outer contour of the gear, and then insert the gear positioning piece into the gap between the gear teeth to clamp the gear teeth from three directions to limit the rotation of the gear. This will avoid inaccurate positioning or unstable clamping when drilling the gear using a drilling machine, which will cause the through hole machined by the drilling machine to tilt, directly affecting the accuracy of the gear transmission, and ensuring the stability and reliability of the gear transmission after the gear drilling process is completed.

[0025] 2. Install the gear onto the drill base chassis by pressing. The arc plate drives the gear positioning plate to work. When drilling the gear, it is convenient for the staff to clamp the gear onto the drilling machine frame quickly and accurately, which increases the convenience of using the device and improves the gear drilling efficiency.

[0026] 3. By setting one end of the gear positioning piece to a triangle with a smooth chamfer, the gear positioning piece can rotate when inserted into the gear tooth gap, thereby limiting and fixing gears with different modules and tooth shapes, thereby improving the adaptability of the positioning component. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the appearance structure of the present invention;

[0028] Figure 2 This is a schematic diagram of the cooperation between the positioning assembly of the present invention and the drill base chassis;

[0029] Figure 3 It is a schematic diagram of the fixed gear of the positioning assembly of the present invention;

[0030] Figure 4 It is a schematic diagram of the appearance of the positioning component of the present invention;

[0031] Figure 5 A cutaway top view of a positioning assembly of the present invention;

[0032] Figure 6 It is a schematic diagram of the movement of the gear positioning plate of the present invention;

[0033] Figure 7 It is a schematic diagram of the cooperation between the rectangular sheet and the snap-in groove of the present invention;

[0034] Figure 8 It is a cut-away side view of the positioning assembly of the present invention.

[0035] In the figure: 1. drilling machine frame; 2. drill base chassis; 21. circular slide groove; 22. limit plate; 23. limit spring; 3. positioning assembly; 31. rotating frame; 311. spring support plate; 312. supporting round rod; 313. arc slider; 314. sliding groove; 315. round hole; 316. snap-in groove; 317. snap-in piece; 318. rectangular slide rail; 319. supporting spring; 3110. square slider; 32. circular arc plate; 33. rotating connecting rod; 34. thrust spring; 35. horizontal slide; 351. circular through hole; 352. holding plate; 4. gear positioning piece; 41. cylindrical long rod; 42. rectangular piece; 5. drilling tool. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only 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.

[0037] In the description of the present invention, it is necessary to understand that the terms "horizontal", "vertical", "up", "down", "center", "side", "fit" and the like indicating orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0038] See also Figures 1 to 8 The present invention provides a high-precision gear processing drilling machine, and the technical solution is as follows:

[0039] When drilling holes in gears, a drilling machine frame 1 is required. A drilling tool 5 is installed on the drilling machine frame 1. The drilling tool 5 can move in a limited position in the horizontal and vertical directions. A drill base chassis 2 is fixedly installed on the drilling machine frame 1. The drill base chassis 2 is set to be circular. The drill base chassis 2 is located below the drilling tool 5. Three identical positioning components 3 are installed on the drill base chassis 2 in a circumferential distribution. Gear positioning pieces 4 are installed on the three positioning components 3. The positioning component 3 fixes the gear to be drilled on the drill base chassis 2. When installing the gear, the positioning component 3 drives the gear positioning piece 4 to move in the horizontal direction. The gear positioning piece 4 is inserted into the gap between the gear teeth. The angle between each positioning component 3 is 60°. When preparing to drill holes in the gear, first adjust the position of the drilling tool 5 on the drilling machine frame 1 so that the drilling tool 5 is aligned with the center of the drill base chassis 2 above the drill base chassis 2. Thereafter, the gear is installed from the drill base chassis 2 to the drill base chassis 2. When the gear surface is about to fit with the drill base chassis 2, the tooth surface of the gear first slides relative to the positioning component 3, and the positioning component 3 first performs preliminary positioning on the three arc surfaces of the circular outer contour of the gear. During the continuous downward movement of the gear, the side wall is pressed by the positioning component 3 and cannot move in the horizontal direction. During the relative sliding between the tooth surface of the gear and the positioning component 3, the gear positioning piece 4 extends from the positioning component 3, and the gear positioning piece 4 is inserted into the gap between the gear teeth, clamping the gear teeth from three directions to limit the rotation of the gear. After completing the positioning and clamping of the gear, the drilling tool 5 on the drilling machine frame 1 is started to move the drilling tool 5 downward in the main axis direction to drill the gear, so as to avoid inaccurate positioning or unstable clamping when using the drilling machine to drill the gear, resulting in the inclination of the through hole machined by the drilling machine for the gear, which directly affects the accuracy of the gear transmission and ensures the stability and reliability of the gear transmission after the gear drilling process is completed.The positioning assembly 3 includes a rotating frame 31, an arc plate 32, a rotating connecting rod 33, a thrust spring 34, and a horizontal slide 35. The bottom of the rotating frame 31 is in contact with the upper surface of the drill base chassis 2. Two arc plates 32 are symmetrically arranged on the rotating frame 31. The upper parts of the two arc plates 32 are rotatably installed in the rotating frame 31. Two spring support plates 311 are symmetrically installed in the rotating frame 31. One end of the thrust spring 34 is connected to the spring support plate 311, and the other end is connected to the lower part of the arc plate 32. The arc plate 32 is pushed out of the rotating frame 31 by the thrust spring 34 and is in an inclined state. The horizontal slide 35 is installed inside the rotating frame 31 and is located between the two arc plates 32. The gear positioning sheet 4 is installed on the horizontal slide 35. The rotating frame 31 Two supporting round rods 312 are symmetrically installed inside, and two rotating connecting rods 33 are symmetrically arranged between the two arc plates 32. The lower ends of the two rotating connecting rods 33 are rotatably connected to the bottom side walls of the arc plates 32, and the middle parts of the two rotating connecting rods 33 are rotatably installed on the supporting round rods 312. The upper ends of the two rotating connecting rods 33 are rotatably connected to the side walls of the horizontal slide seat 35. The side walls of the arc plates 32 are fitted with the inner side walls of the rotating frame 31. When the gear is pressed down from the top of the drill seat chassis 2 for installation, the tooth surface of the gear first contacts the side surface of the upper part of the arc plate 32. In the process of the gear being continuously pressed downward, the gear and the side surface of the arc plate 32 slide relative to each other and also squeeze the arc plate 32, so that the arc plate 32 is limitedly rotated toward the spring support plate 311, and the arc plate 32 is The tilting angle with the rotating frame 31 changes from large to small, the thrust spring 34 is gradually compressed, and the rotating connecting rod 33 is divided into two parts: a bottom connecting rod and a tilting connecting rod. One end of the bottom connecting rod is rotatably connected to the bottom of the side wall of the arc plate 32, and the connection position is lower than the rotation connection between the arc plate 32 and the rotating frame 31. The other end of the bottom connecting rod faces the inside of the rotating frame 31, and this end is rotatably connected to the bottom end of the tilting connecting rod. When the gear is not installed, the angle between the bottom connecting rod and the tilting connecting rod is an obtuse angle. The middle part of the tilting connecting rod is rotatably connected to the supporting circular rod 312, and the upper side wall of the tilting connecting rod is rotatably connected to the side wall of the horizontal slide 35. The position of the supporting circular rod 312 is between the two rotating connection points. When the gear is pressed downward and the arc plate 32 is limitedly rotated, the circular The arc plate 32 drives the bottom connecting rod to move toward the spring support plate 311. Under the limiting effect of the supporting round rod 312, the tilting connecting rod rotates with the supporting round rod 312 as the axis. The angle between the bottom connecting rod and the tilting connecting rod becomes an acute angle. When the tilting connecting rod rotates, it drives the horizontal slide 35 to move toward the gear direction. The gear positioning piece 4 installed on the horizontal slide 35 moves with the horizontal slide 35. The gear positioning piece 4 is inserted into the gap between the gear teeth, clamps the gear teeth from three directions, and limits the rotation of the gear. The gear is fixedly clamped on the drill seat chassis 2 in the form of pressing. When drilling the gear, it is convenient for the staff to quickly and accurately clamp the gear to the drilling machine frame 1, which increases the convenience of the device and improves the gear drilling efficiency. ;

[0040] As an embodiment of the present invention, refer to Figures 3 to 8One end of the gear positioning piece 4 is set to be triangular, and a smooth chamfer is provided on the triangle. A cylindrical long rod 41 is fixedly installed on the other end of the gear positioning piece 4. A circular through hole 351 is provided on the horizontal slide 35. The cylindrical long rod 41 rotates and slides with the circular through hole 351. The radius section of the cylindrical long rod 41 between the circular through hole 351 and the gear positioning piece 4 is larger than the circular through hole 351, so that the horizontal slide 35 can drive the gear positioning piece 4 to move in one direction. When the gear and the arc plate 32 slide relative to each other, the gear positioning piece 4 extends from the rotating frame 31, and the top of the triangular end of the gear positioning piece 4 first contacts the gap between the gear teeth. The gear positioning piece 4 is in contact with the gap. If the gear tooth profile is a straight tooth, the gear positioning piece 4 is kept in a vertical state and inserted into the gap of the gear teeth to limit the gear. If the gear tooth profile is a helical tooth, the gear positioning piece 4 will rotate, driving the cylindrical long rod 41 to rotate in the circular through hole 351. After the gear positioning piece 4 rotates to adapt to the inclination angle of the helical gear teeth, the gap of the gear teeth is clamped. The gear positioning piece 4 can limit and fix gears with different modules and tooth shapes, thereby improving the adaptability of the positioning assembly 3. A holding plate 352 is fixedly installed on the horizontal slide 35, and a sliding groove 314 is provided on the rotating frame 31. The holding plate 352 is located in the sliding groove 31 4 and fits with the inner wall of the sliding groove 314. During the process of the gear positioning piece 4 being inserted into the gear tooth gap, the horizontal slide 35 drives the holding plate 352 to move in the same direction as the gear positioning piece 4. When the gear is pressed into the drill seat chassis 2, the side wall of the arc plate 32 fits with the gear tooth surface, and the horizontal slide 35 drives the holding plate 352 to move toward the gear direction. The holding plate 352 and the sliding groove 314 slide relative to each other, and finally the holding plate 352 is located above the gear, limiting the movement of the gear in the vertical direction and improving the stability of the device. A circular slide groove 21 is provided on the drill seat chassis 2, and the circular slide groove 21 is located below the arc plate 32. The rotating frame 31 The bottom is provided with an arc-shaped slider 313, which is slidably matched with the circular slide groove 21. The height of the arc-shaped slider 313 is equal to the depth of the circular slide groove 21, so as to ensure that the bottom surface of the rotating frame 31 fits the upper surface of the drill seat chassis 2. The rotating frame 31 can rotate on the drill seat chassis 2. When the gear is pressed on the drill seat chassis 2, the gear positioning piece 4 may first contact the gear teeth, causing the gear positioning piece to be unable to be inserted into the gear tooth gap. At this time, the rotating frame 31 will rotate slightly on the drill seat chassis 2, so that the position of the gear positioning piece 4 is slightly offset and inserted into the gear tooth gap, further improving the adaptability of the positioning assembly 3.A circular hole 315 is provided on the side wall of the rotating frame 31, and one end of the cylindrical long rod 41 passes through the circular hole 315. The radius of the circular hole 315 is larger than the cylindrical long rod 41. When the rotating connecting rod 33 drives the horizontal slide 35 to move, the horizontal slide 35 will also move slightly in the vertical direction. The cylindrical long rod 41 can move in the vertical direction of the circular hole 315 to avoid interference of the device. A clamping groove 316 is provided on the circular hole 315. The inner circumference of the clamping groove 316 is distributed with clamping pieces 317. The clamping pieces 317 are made of rubber material. The cylindrical long rod 41 Two rectangular pieces 42 are symmetrically installed at the end, and the spacing between each clamping piece 317 is smaller than the width of the rectangular piece 42. When the gear is pressed and installed, when the gear positioning piece 4 is inserted into the gap between the gear teeth, the rectangular piece 42 will also be inserted into the clamping groove 316. The clamping piece 317 limits the rotation of the cylindrical long rod 41 to prevent the gear positioning piece 4 from rotating after the limited clamping is completed, thereby improving the stability and positioning accuracy of the limited clamping of the gear positioning piece 4; each rotating frame 31 is provided with a limited plate 22 on both sides, and the limited plate 22 is vertically fixedly installed On the drill base chassis 2, a limit spring 23 is fixedly installed on the side wall of the limit plate 22, and the other end of the limit spring 23 is connected to the side wall of the rotating frame 31 to prevent the rotating frame 31 from continuously rotating or excessively rotating on the drill base bottom plate, thereby ensuring the relative distance of each positioning assembly 3, so that the positioning assembly 3 clamps the gear, and further improves the stability of the positioning assembly 3; a rectangular slide rail 318 is provided in the rotating frame 31, and the rectangular slide rail 318 is parallel to the inner side wall of the rotating frame 31, and the bottom of the rectangular slide rail 318 is in contact with the upper surface of the drill base chassis 2, and the horizontal slide 3 A support spring 319 is fixedly installed at the bottom, and the other end of the support spring 319 is fixedly connected to a square slider 3110. The square slider 3110 is located inside the rectangular slide rail 318 and slides with the rectangular slide rail 318. When the horizontal slide 35 moves, the square slider 3110 moves with the horizontal slide 35 in the rectangular slide rail 318. The support spring 319 provides an upward support force for the horizontal slide 35, so that the horizontal slide 35 drives the gear positioning piece 4 to move more stably and smoothly, further improving the stability of the gear positioning piece 4.

[0041] Working principle: when drilling a hole in a gear, gears of different modules can be pressed into the drill base chassis 2 from above the drill base chassis 2. During the pressing process of the gear, the gear contacts the side of the upper part of the arc plate 32, and the arc plate 32 is limitedly rotated toward the direction of the spring support plate 311. The thrust spring 34 is compressed, and the inclination angle between the arc plate 32 and the rotating frame 31 changes from large to small. The rotation of the arc plate 32 drives the rotating connecting rod 33 to work. Under the limiting action of the supporting round rod 312, the rotating connecting rod 33 drives the horizontal slide 35 to move toward the gear direction, and the gear positioning plate 4 moves with the horizontal slide 35. When fixing the spur gear, the gear positioning plate 4 is vertically inserted into the gap between the spur gear teeth, clamping the gear teeth from three directions to limit the rotation of the spur gear. When the helical gear is moving and fixed, the triangular end of the gear positioning piece 4 first contacts the gear teeth, and rotates simultaneously during the continuous movement of the gear positioning piece 4 to adapt to the inclination angle of the helical gear teeth, and then is fully inserted into the helical gear teeth, clamping the gear teeth from three directions to limit the rotation of the helical gear. The holding plate 352 moves with the horizontal slide 35 and is located above the gear, limiting the movement of the gear in the vertical direction. After the gear positioning piece 4 is inserted into the gear tooth gap, the rectangular piece 42 is inserted into the snap-in groove 316, and fits tightly with the snap-in piece 317 to complete the locking of the gear positioning piece 4. At this time, the positioning assembly 3 completely fixes the gear, and the drilling tool 5 on the drilling machine frame 1 can be started to move the drilling tool 5 downward in the spindle direction to drill the gear.

[0042] A specific embodiment of the present invention is described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above described embodiment. For those skilled in the art, various changes, modifications, substitutions and variations of these embodiments without departing from the principles and ideas of the present invention should still fall within the scope of protection of the present invention.

Claims

1. A drilling machine for high-precision gear processing, characterized in that: The invention comprises a drilling machine frame (1), a drill base chassis (2), a positioning assembly (3), and a gear positioning plate (4); a drilling tool (5) is installed on the drilling machine frame (1); the drilling tool (5) can be limitedly moved in the horizontal and vertical directions; the drill base chassis (2) is fixedly installed on the drilling machine frame (1); the drill base chassis (2) is located below the drilling tool (5); three identical positioning assemblies (3) are circumferentially installed on the drill base chassis (2); the three positioning assemblies (3) are all installed with a gear positioning plate (4); the positioning assembly (3) fixes the gear to be drilled on the drill base chassis (2); when installing gears of different modules, the positioning assembly (3) drives the gear positioning plate (4) to move in the horizontal direction; the gear positioning plate (4) can be inserted into the gear tooth gap between the spur gear and the helical gear.

2. A high-precision gear processing drilling machine according to claim 1, characterized in that: The positioning assembly (3) comprises a rotating frame (31), an arc plate (32), a rotating connecting rod (33), a thrust spring (34), and a horizontal slide seat (35). The bottom of the rotating frame (31) is in contact with the upper surface of the drill seat chassis (2). Two arc plates (32) are symmetrically arranged on the rotating frame (31). The upper parts of the two arc plates (32) are rotatably installed in the rotating frame (31). Two spring support plates (311) are symmetrically installed in the rotating frame (31). One end of the thrust spring (34) is connected to the spring support plate (311), and the other end is connected to the lower part of the arc plate (32). The arc plate (32) is supported by the thrust spring (34). ) pushes out the rotating frame (31) to be in an inclined state, the horizontal slide (35) is installed inside the rotating frame (31) and is located between the two arc plates (32), the gear positioning plate (4) is installed on the horizontal slide (35), two supporting round rods (312) are symmetrically installed inside the rotating frame (31), two rotating connecting rods (33) are symmetrically arranged between the two arc plates (32), the lower ends of the two rotating connecting rods (33) are rotatably connected to the bottom side wall of the arc plate (32), the middle parts of the two rotating connecting rods (33) are rotatably installed on the supporting round rods (312), and the upper ends of the two rotating connecting rods (33) are rotatably connected to the side wall of the horizontal slide (35).

3. A high-precision gear processing drilling machine according to claim 2, characterized in that: One end of the gear positioning piece (4) is arranged in a triangular shape, and a smooth chamfer is provided on the triangle. A cylindrical long rod (41) is fixedly mounted on the other end of the gear positioning piece (4). A circular through hole (351) is provided on the horizontal slide seat (35). The cylindrical long rod (41) and the circular through hole (351) are rotationally and slidably matched. When the gear positioning piece (4) is inserted into the inclined gear tooth gap, the cylindrical long rod (41) rotates.

4. A high-precision gear processing drilling machine according to claim 2, characterized in that: A circular slide groove (21) is provided on the drill base chassis (2), and the circular slide groove (21) is located below the arc plate (32). An arc-shaped slider (313) is installed at the bottom of the rotating frame (31), and the arc-shaped slider (313) is slidably matched with the circular slide groove (21), and the height of the arc-shaped slider (313) is equal to the depth of the circular slide groove (21).

5. The high-precision gear processing drilling machine according to claim 3, characterized in that: A holding plate (352) is fixedly mounted on the horizontal slide (35), a sliding groove (314) is provided on the rotating frame (31), the holding plate (352) is located in the sliding groove (314) and is in contact with the inner wall of the sliding groove (314), and when the gear positioning plate (4) is inserted into the gear tooth gap, the horizontal slide (35) drives the holding plate (352) and the gear positioning plate (4) to move in the same direction.

6. A high-precision gear machining drilling machine according to claim 5, characterized in that: A circular hole (315) is provided on the side wall of the rotating frame (31), and one end of the cylindrical long rod (41) passes through the circular hole (315). The radius of the circular hole (315) is larger than that of the cylindrical long rod (41). A clamping groove (316) is provided on the circular hole (315). Clamping pieces (317) are distributed on the inner circumference of the clamping groove (316). The clamping pieces (317) are made of rubber material. Two rectangular pieces (42) are symmetrically installed at the end of the cylindrical long rod (41). The spacing between each clamping piece (317) is smaller than the width of the rectangular piece (42). After the gear positioning piece (4) is inserted into the gear tooth gap, the rectangular piece (42) is inserted into the clamping groove (316).

7. A high-precision gear processing drilling machine according to claim 4, characterized in that: Limiting plates (22) are provided on both sides of each rotating frame (31), and the limiting plates (22) are vertically fixedly mounted on the drill base chassis (2). A limiting spring (23) is fixedly mounted on the side wall of the limiting plate (22), and the other end of the limiting spring (23) is connected to the side wall of the rotating frame (31).

8. The high-precision gear processing drilling machine according to claim 6, characterized in that: A rectangular slide rail (318) is provided inside the rotating frame (31), and the rectangular slide rail (318) is parallel to the inner wall of the rotating frame (31). The bottom of the rectangular slide rail (318) is in contact with the upper surface of the drill base chassis (2). A support spring (319) is fixedly installed at the bottom of the horizontal slide seat (35), and the other end of the support spring (319) is fixedly connected to a square slider (3110). The square slider (3110) is located inside the rectangular slide rail (318) and slidably cooperates with the rectangular slide rail (318).

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