Precision trimming device for large gear machining

Abstract

The utility model relates to the technical field of gear machining, in particular to a precision trimming device for large gear machining, which comprises a support table, the support table is an annular cylinder, a wear-resistant sleeve is fixed at the upper end of the support table, a worktable is rotatably mounted above the support table, a cross-shaped sliding chute for mounting a tool is formed at the upper end of the worktable, and a plurality of grooves are formed in the cross-shaped sliding chute. A supporting rail matched with the wear-resisting sleeve is fixed to the lower surface of the workbench, a cylindrical roller bearing is arranged between the supporting rail and the wear-resisting sleeve, and a transmission gear ring is fixed to the outer wall of the upper end of the workbench. The device has the beneficial effects that the transmission gear ring on the workbench is driven to rotate through two groups of four transmission gears, the rotating speed of each group of transmission gears can be independently controlled, and lateral gaps of the gears can be eliminated through meshing transmission of the four gears and the gear ring in the driving process; and it is guaranteed that the workbench cannot generate large-amplitude vibration due to the action of the cutter during tooth machining, and therefore the machining precision of the gear is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to gear machining technical field especially is related to a precision finishing device for large gear machining. BACKGROUND

[0002] Gear is one of the most widely used basic components in mechanical transmission, and the annual demand of gears in various countries is very huge. Gear manufacturing technology has a great influence on gear quality and cost. Large involute gears used in large equipment such as wind turbines and high-precision machine tools require high transmission precision. Some require to ensure the gear circle size precision, ensure the involute tooth profile and the size tolerance of the indexing circle, and meet the involute tooth profile smoothness of 0.08 or more. This requires that the workbench for fixing the gear can rotate with high precision to ensure the stability of the machining center.

[0003] Small gears can be machined with high precision by being fixed on a lathe, but there is no precision finishing work platform for large gears at present. UTILITY MODEL CONTENTS

[0004] The utility model discloses a precision finishing device for large gear machining to solve the above problems.

[0005] The technical scheme of the utility model is as follows:

[0006] A precision finishing device for large gear machining, comprising a support table, the support table is an annular column, the support table upper end is fixed with wear-resistant sleeve, the support table upper portion is rotatably installed with workbench, the workbench upper end is formed with cross slide of installation tooling, the workbench lower surface is fixed with support rail that is installed with wear-resistant sleeve cooperation, the support rail and wear-resistant sleeve between be provided with cylindrical roller bearing, the workbench upper end outer wall is fixed with transmission gear ring, the support table side wall is fixed with two anti-backlash mechanisms that are symmetric with transmission gear ring transmission connection, the anti-backlash mechanism includes with the support table fixed together fixed plate, the fixed plate is U-shaped, the fixed plate middle symmetry is installed with two transmission shafts, the transmission shaft with fixed plate rotatable connection, each transmission shaft lower end is fixed with driven gear, the transmission shaft upper end is fixed with transmission gear that is engaged with transmission gear ring, the fixed plate lower end middle part is fixed with anti-backlash motor, the power output shaft of anti-backlash motor is fixed with driving gear that is engaged with two driven gears.

[0007] Further, one side of the support table is provided with a support frame, a horizontally fixed fixed beam is fixed to the upper end of the support frame, a transmission screw rod is rotatably installed in the fixed beam, a power mechanism is fixed to the upper end of the support frame and is in transmission connection with the support frame, a ball sleeve is fixed to the transmission screw rod, a vertical fixing plate is fixed to the lower end of the ball sleeve, a detachable fixing frame is detachably connected and fixed to one side of the vertical fixing plate towards the support table, a grinding motor is fixed to the detachable fixing frame, and a gear processing device is fixed to the power output shaft of the grinding motor.

[0008] Further, a horizontal sliding channel is fixed to the top of the fixed beam, and the upper end of the ball sleeve is slidably and movably installed in the horizontal sliding channel.

[0009] Further, a V-shaped groove is formed in the upper end of the wear-resistant sleeve, a V-shaped protrusion is formed in the lower end of the support rail and is matched and installed in the V-shaped groove, and the cylindrical roller bearing is installed in the V-shaped groove.

[0010] Further, the gear processing device is any one of a gear hobbing cutter and a gear grinding wheel.

[0011] The beneficial effects of the present application are as follows: the two groups of four transmission gears drive the transmission gear rings on the workbench to rotate, the rotation speed of each group of transmission gears can be controlled individually, the lateral gap of the gears can be eliminated through the meshing transmission of the four gears and the gear rings during driving, the workbench can be prevented from vibrating greatly due to the action of the cutter during gear machining, and the machining precision of the gears is improved; the device can be used for gear hobbing machining and gear tooth trimming of large-size gears, the machining precision of the large-size gears is improved, and a basis is provided for equipment manufacturing requiring high gear transmission precision. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed in the following embodiment or prior art description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor.

[0013] Figure 1 is a perspective view of the present application;

[0014] Figure 2 is a front view of the present application;

[0015] Figure 3 is a main sectional view of the present application;

[0016] Figure 4is a plan view of the utility model.

[0017] The reference signs are explained as follows:

[0018] 1, support platform; 2, anti-backlash mechanism; 21, fixed plate; 22, anti-backlash motor; 23, driving gear; 24, driven gear; 25, transmission shaft; 26, transmission gear; 3, workbench; 4, support frame; 5, fixed cross beam; 6, transmission screw; 7, ball sleeve; 8, vertical fixed plate; 9, detachable fixing frame; 10, gear tooth processing device; 11, grinding motor; 12, power mechanism; 13, horizontal slide; 14, transmission gear ring; 15, support rail; 16, wear-resistant sleeve; 17, cylindrical roller bearing. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.

[0020] Embodiment one:

[0021] As Figures 1-4As shown, a large gear machining precision finishing device, including support table 1, support table 1 is annular column, support table 1 upper end fixed with wear-resistant sleeve 16, support table 1 upper rotationally mounted with workbench 3, workbench 3 upper end shaped with cross-shaped sliding groove of installation clamping tool, workbench 3 lower surface fixed with support rail 15 installed with wear-resistant sleeve 16 cooperation, support rail 15 and wear-resistant sleeve 16 between the setting has a cylindrical roller bearing 17, through the cylindrical roller bearing 17 support to reduce friction, ensure the smooth and rapid rotation of workbench 3, workbench 3 upper end outer wall fixed with transmission gear ring 14, support table 1 side wall fixed with two symmetrical transmission gear ring 14 transmission connection's backlash mechanism 2, using backlash mechanism 2 can drive workbench 3 to rotate stably, backlash mechanism 2 includes with support table 1 fixed together with the fixed plate 21, fixed plate 21 is U-shaped, fixed plate 21 symmetrically installed with two transmission shaft 25, transmission shaft 25 and fixed plate 21 rotationally connected, each transmission shaft 25 lower end fixed with driven gear 24, transmission shaft 25 upper end fixed with transmission gear 26 meshing transmission with transmission gear ring 14, fixed plate 21 lower end middle part fixed with backlash motor 22, backlash motor 22 is servo motor, the power output shaft of backlash motor 22 fixed with two driven gear 24 meshing transmission drive gear 23, before gear machining, test run, by constantly adjusting two servo motor pulse signal input to fine tune the speed of two sets of transmission gear 26, eliminate the transmission gear 26 and transmission gear ring 14 transmission when the lateral clearance, so as to realize the use of mechanical transmission principle and servo motor pulse signal adjustable characteristics, effectively realize the transmission accuracy, through the continuous adjustment of servo motor pulse signal to realize the repeat positioning to ensure the accuracy, meet the gear slot in the circle gradually open line cutting and finishing machining, meet the gear each row position tolerance IT5-IT6 accuracy.

[0022] In this embodiment, the support frame 4 is provided on one side of the support table 1, the fixed horizontal fixed cross beam 5 is fixed on the upper end of the support frame 4, the transmission screw rod 6 is rotatably installed in the fixed cross beam 5, the power mechanism 12 is fixed on the upper end of the support frame 4 and is in transmission connection with the support frame 4, the power mechanism 12 includes a gearbox and a driving motor, the ball sleeve 7 is fixed on the transmission screw rod 6, the vertical fixed plate 821 is fixed on the lower end of the ball sleeve 7, the detachable fixing frame 9 is detachably connected and fixed on one side of the vertical fixed plate 821 facing the support table 1, the grinding motor 11 is fixed on the detachable fixing frame 9, the gear machining device 10 is fixed on the power output shaft of the grinding motor 11, the gear machining device 10 is a hobbing cutter, the power mechanism 12 can drive the gear machining device 10 to approach or move away from the workbench 3, the hobbing cutter is driven to rotate by the grinding motor 11 to process the gear teeth on the rotating gear blank, the cooperation of the backlash workbench and the hobbing cutter greatly improves the domestic situation, and opens a door for domestic manufacturing of large high-precision equipment (MZKN 3.5 meters to MZKN 10 meters) gear grinding machine.

[0023] In the embodiment, the horizontal slide 13 is fixed on the top of the fixed beam 5, and the upper end of the ball sleeve 7 is slidably connected with the horizontal slide 13, so that the horizontal movement of the ball sleeve 7 is stable.

[0024] In the embodiment, the upper end of the wear-resistant sleeve 16 is formed with a V-shaped groove, the lower end of the supporting rail 15 is formed with a V-shaped protrusion matched with the V-shaped groove, and the cylindrical roller bearing 17 is installed in the V-shaped groove, so that the gear can be automatically centered after being placed on the workbench 3.

[0025] In the embodiment,

[0026] Preferably, the clamping tool is an electric claw, and the electric mechanism for driving the claw is fixed on the lower surface of the center of the workbench 3, so that the gear can be automatically centered and clamped.

[0027] Embodiment two:

[0028] The embodiment is basically the same as the embodiment one, and the difference is that:

[0029] In the embodiment, the gear tooth processing device 10 is a gear grinding wheel, which can be used to trim the processed gear teeth, so as to improve the transmission accuracy.

[0030] The working principle of the utility model is as follows: before gear tooth processing, a large gear ring is fixed on the workbench 3 by using a clamp, and the rotation speed of the two anti-backlash motors 22 is controlled by outputting pulse signals of the controller electrically connected with the anti-backlash motors 22 for trial running, the rotation speeds of the two anti-backlash motors 22 can be slightly different, since the transmission gear 26 and the transmission gear ring 14 are both involute gears, when the workbench 3 is rotated by the transmission gear 26, the four driven gears 24 symmetrically arranged on the two sides of the workbench 3 drive the transmission gear ring 14 to rotate, the lateral clearance of the gear is eliminated, so that the workbench 3 does not vibrate horizontally during rotation, when the gear tooth is processed by a hobbing cutter, the gear ring will stably rotate, so as to ensure the processing accuracy, when the processed gear is trimmed, the hobbing cutter is replaced by a gear grinding wheel, so that the gear teeth can be polished and trimmed, and all gear teeth can be trimmed by step rotation of the gear ring driven by the anti-backlash mechanism 2.

[0031] The components not described in detail in the text are prior art.

[0032] The above description is only the preferred embodiment of the utility model, and is not used to limit the utility model, any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A precision dressing device for machining of a large gear, characterized by: The utility model provides a kind of support table (1), the support table (1) is annular cylinder, wear-resistant sleeve (16) is fixed on the upper end of the support table (1), workbench (3) is rotatably installed above the support table (1), the upper end of the workbench (3) is shaped with the cross slide of installation tool, the lower surface of the workbench (3) is fixed with the support rail (15) of cooperation installation with the wear-resistant sleeve (16), the support rail (15) is provided with cylindrical roller bearing (17) between the wear-resistant sleeve (16), the outer wall of the upper end of the workbench (3) is fixed with transmission gear ring (14), the side wall of the support table (1) is fixed with two anti-backlash mechanisms (2) of transmission connection with the transmission gear ring (14) symmetrically, the fixed plate (21) is fixed together with the support table (1) in the anti-backlash mechanism (2), the fixed plate (21) is U-shaped, two transmission shafts (25) are symmetrically installed in the middle of the fixed plate (21), the transmission shaft (25) is rotatably connected with the fixed plate (21), the driven gear (24) is fixed on the lower end of each transmission shaft (25), the transmission shaft (25) is fixed with the transmission gear (26) of meshing transmission with the transmission gear ring (14) on the upper end, the anti-backlash motor (22) is fixed on the power output shaft of the anti-backlash motor (22) in the middle of the lower end of the fixed plate (21), the driving gear (23) of meshing transmission with two driven gears (24) is fixed on the power output shaft.

2. The precision dressing device for large gear machining according to claim 1, characterized in that: The support table (1) is provided with support frame (4) on one side, the fixed crossbeam (5) of horizontal fixation is fixed on the upper end of the support frame (4), the transmission screw rod (6) is rotatably installed in the fixed crossbeam (5), the power mechanism (12) is fixed on the upper end of the support frame (4) and is transmission connected with the support frame (4), the ball sleeve (7) is fixed on the transmission screw rod (6), the vertical fixed plate (821) is fixed on the lower end of the ball sleeve (7), the detachable fixing frame (9) is fixed on the side of the vertical fixed plate (821) towards the support table (1) by detachable connection, the grinding motor (11) is fixed on the detachable fixing frame (9), the gear tooth processing device (10) is fixed on the power output shaft of the grinding motor (11).

3. The precision dressing device for large gear machining according to claim 2, characterized in that: The horizontal slide (13) is fixed on the top of the fixed crossbeam (5), the upper end of the ball sleeve (7) is slidably installed with the horizontal slide (13).

4. The precision dressing device for large gear machining according to claim 1, characterized in that: The upper end of the wear-resistant sleeve (16) is shaped with V-shaped groove, the lower end of the support rail (15) is shaped with V-shaped protrusion, the cylindrical roller bearing (17) is installed in V-shaped groove.

5. The precision dressing device for large gear machining according to claim 2 or 3, characterized in that: The gear tooth processing device (10) is any one of hobbing cutter, gear grinding wheel.

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