Double-motor parallel driving anti-backlash mechanism for five-axis machining center

Abstract

The utility model provides a kind of double-motor parallel driving anti-backlash mechanism for five-axis machining center, it is related to five-axis machining technical field, to solve the problem that the existing gear set fixing mode is rigidly fixed, wear clearance is generated when running and reduces operating accuracy, without setting up anti-backlash mechanism to eliminate wear clearance to ensure operating accuracy, it include: the rack A is provided at the both sides of main body top;Mobile piece A bottom is provided with mounting seat A;Bolt A is provided on mounting seat A;Pre-pressing support shaft A is connected with mounting seat A by spring;The gear on fixed seat A is engaged with rack A. By adjusting bolt A and bolt B respectively, it is contacted with pre-pressing support shaft A and pre-pressing support shaft B when moving, drive pre-pressing support shaft A and pre-pressing support shaft B move and compress spring, and then respectively with the side of fixed seat A and fixed seat B contact, effectively eliminate the gear and rack A, rack B engagement accuracy by elastic pre-pressing to improve double gear and rack A, rack B engagement accuracy.

Description

Technical Field

[0001] This utility model belongs to the field of five-axis machining technology, and more specifically, it relates to a dual-motor parallel drive backlash elimination mechanism for a five-axis machining center. Background Technology

[0002] A five-axis machining center is an advanced CNC machine tool that adds two rotary axes (two of A, B, and C) to the traditional three linear coordinate axes (X, Y, and Z), allowing the tool to move simultaneously relative to the workpiece in five degrees of freedom. This means it can complete the machining of complex spatial curved surface parts in a single setup.

[0003] Based on existing technology, it has been found that the X and Y axes of existing five-axis machining centers use gear and rack transmission for movement. The existing gear sets are rigidly fixed, which will generate wear gaps during operation and reduce the running accuracy. No backlash elimination mechanism is set to eliminate wear gaps to ensure running accuracy. Utility Model Content

[0004] To solve the above-mentioned technical problems, this utility model provides a dual-motor parallel drive backlash elimination mechanism for a five-axis machining center. This addresses the issue that existing five-axis machining centers use gear and rack transmission for X and Y axis movement, and the existing gear sets are rigidly fixed, which generates wear gaps during operation, reducing running accuracy. The lack of a backlash elimination mechanism eliminates these wear gaps to ensure running accuracy.

[0005] This utility model discloses a dual-motor parallel drive backlash elimination mechanism for a five-axis machining center, achieved through the following specific technical means: A dual-motor parallel drive backlash elimination mechanism for a five-axis machining center includes a machining mechanism, a Y-axis moving mechanism, a mounting mechanism, and an X-axis moving mechanism; The processing mechanism is equipped with a Y-axis moving mechanism; the mounting mechanism is mounted on the Y-axis moving mechanism; and the X-axis moving mechanism is mounted on the mounting mechanism. The processing mechanism includes: a main body, on which racks A are provided on both sides of the top; The Y-axis moving mechanism includes: a moving component A, which is disposed on the top of the main body; two sets of motors are disposed on the top of the moving component A; a mounting base A is disposed on the bottom of the moving component A; bolts A are disposed on the mounting base A; a preload support shaft A is disposed on the mounting base A; the preload support shaft A is connected to the mounting base A by a spring; a fixed base A is disposed on the bottom of the moving component A; a gear is disposed on the fixed base A; the gear on the fixed base A meshes with a rack A; and the side of the fixed base A contacts the preload support shaft A.

[0006] Furthermore, the processing mechanism also includes: slide rail A; The slide rail A is fixedly installed on both sides of the top of the main body; a movable part A is slidably installed on the slide rail A.

[0007] Furthermore, the mounting base A is correspondingly provided with the fixed base A; the bolt A is in contact with the preload support shaft A; and the mounting base A is provided on the side of the fixed base A.

[0008] Furthermore, the mounting mechanism includes: a mounting component, a slide rail B, and a rack B; Movable parts A are provided on both sides of the bottom of the mounting component; slide rail B is provided on the mounting component; rack B is provided on the mounting component.

[0009] Furthermore, the movable component B is slidably mounted on the slide rail B; two sets of motors are fixedly mounted on the movable component B; guide rails are provided on both sides of the movable component B; the column is slidably connected to the movable component B through the guide rails; the column is connected to the movable component B through a ball screw; and a cutter is provided at the bottom of the column.

[0010] Furthermore, the X-axis moving mechanism also includes: mounting base B, bolt B, preload support shaft B, and fixed base B; The mounting base B is disposed on the movable component B; the bolt B is disposed on the mounting base B; the preload support shaft B is disposed inside the mounting base B; the preload support shaft B is connected to the mounting base B by a spring; the fixed base B is disposed on the movable component B; a gear is disposed at the bottom of the fixed base B; the gear of the fixed base B is connected to the motor output shaft on the movable component B; the gear of the fixed base B meshes with the rack B.

[0011] Compared with the prior art, the present invention has the following beneficial effects: 1. In this device, preload support shaft A and preload support shaft B are provided. Preload support shaft A is installed inside mounting base A, and preload support shaft B is installed inside mounting base B. During installation, by adjusting bolts A and B respectively, they are brought into contact with preload support shafts A and B during movement. This causes preload support shafts A and B to move and compress the spring, thereby bringing preload support shafts A and B into contact with the sides of fixed bases A and B respectively. The elastic preload effectively eliminates the meshing accuracy of gears and racks A and B, thereby improving the meshing accuracy of the double gears and racks A and B. The elastic preload provides a certain preload force to eliminate meshing backlash, ensuring accuracy during operation and improving the production quality of the workpiece during processing. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall three-dimensional structure of this utility model.

[0013] Figure 2This is a three-dimensional structural diagram of the X-axis moving mechanism of this utility model.

[0014] Figure 3 This is a schematic diagram of the main structure of the Y-axis moving mechanism of this utility model.

[0015] Figure 4 This is a side view of the Y-axis moving mechanism of this utility model.

[0016] In the diagram, the correspondence between component names and drawing numbers is as follows: 1. Machining mechanism; 101. Main body; 102. Rack A; 103. Slide rail A; 2. Y-axis moving mechanism; 201. Moving part A; 202. Mounting seat A; 203. Bolt A; 204. Preload support shaft A; 205. Fixed seat A; 3. Installation mechanism; 301. Installation part; 302. Slide rail B; 303. Rack B; 4. X-axis moving mechanism; 401. Moving part B; 402. Column; 403. Mounting seat B; 404. Bolt B; 405. Preload support shaft B; 406. Fixed seat B. Detailed Implementation

[0017] The embodiments of this utility model will be described in further detail below with reference to the accompanying drawings and examples.

[0018] Example: As attached Figure 1 To be continued Figure 4 As shown: This utility model provides a dual-motor parallel drive backlash elimination mechanism for a five-axis machining center, including a machining mechanism 1, a Y-axis moving mechanism 2, a mounting mechanism 3, and an X-axis moving mechanism 4; The machining mechanism 1 is equipped with a Y-axis moving mechanism 2; the mounting mechanism 3 is mounted on the Y-axis moving mechanism 2; and the X-axis moving mechanism 4 is mounted on the mounting mechanism 3. The processing mechanism 1 includes: a main body 101, with racks A102 provided on both sides of the top of the main body 101; the main body 101 is used to install racks A102 and slide rails A103. The Y-axis moving mechanism 2 includes: a moving part A201, which is disposed on the top of the main body 101; two sets of motors are disposed on the top of the moving part A201; a mounting base A202 is disposed on the bottom of the moving part A201; bolts A203 are disposed on the mounting base A202; a preload support shaft A204 is disposed on the mounting base A202; the preload support shaft A204 is connected to the mounting base A202 by a spring; a fixed base A205 is disposed on the bottom of the moving part A201; a gear is disposed on the fixed base A205; the gear on the fixed base A205 meshes with a rack A102; the side of the fixed base A205 contacts the preload support shaft A204; the moving part here... A201 is used to drive the gear on the fixed seat A205 to rotate via a motor, which meshes with the rack A102 and moves on the slide rail A103. The mounting seat A202 is used to install the bolt A203 and the preload support shaft A204. By adjusting the bolt A203, the bolt A203 comes into contact with the preload support shaft A204, causing the preload support shaft A204 to move and compress the spring, thus contacting the fixed seat A205. The elastic preload provides a certain preload to eliminate meshing gaps and ensure accuracy during operation. The moving part A201 uses dual motors, which can increase output efficiency and improve movement reliability.

[0019] Among them, such as Figure 1 As shown, the processing mechanism 1 also includes: a slide rail A103; the slide rail A103 is fixedly installed on both sides of the top of the main body 101; a movable part A201 is slidably installed on the slide rail A103; the slide rail A103 here is used to slide and install the movable part A201.

[0020] Among them, such as Figure 4 As shown, mounting base A202 is correspondingly provided with fixed base A205; bolt A203 is in contact with preload support shaft A204; mounting base A202 is provided on the side of fixed base A205.

[0021] Among them, such as Figure 1 As shown, the mounting mechanism 3 includes: a mounting component 301, a slide rail B302, and a rack B303; movable components A201 are provided on both sides of the bottom of the mounting component 301; the slide rail B302 is mounted on the mounting component 301; the rack B303 is mounted on the mounting component 301; the mounting component 301 here is used to mount the slide rail B302 and the rack B303.

[0022] Among them, such as Figure 2As shown, the X-axis moving mechanism 4 includes: a moving part B401 and a column 402; the moving part B401 is slidably mounted on the slide rail B302; two sets of motors are fixedly mounted on the moving part B401; guide rails are provided on both sides of the moving part B401; the column 402 is slidably connected to the moving part B401 through the guide rails; the column 402 is connected to the moving part B401 through a ball screw; a cutter is provided at the bottom of the column 402; the moving part B401 is used to drive the gear on the fixed base B406 to rotate through the dual motors and mesh with the rack B303, thereby driving the moving part B401 to move on the slide rail B302, and the ball screw drives the column 402 to move up and down, so that the cutter on the column 402 can adapt to the processing of workpieces of different heights.

[0023] Among them, such as Figure 2 As shown, the X-axis moving mechanism 4 further includes: a mounting base B403, a bolt B404, a preload support shaft B405, and a fixed base B406; the mounting base B403 is mounted on the moving part B401; the bolt B404 is mounted on the mounting base B403; the preload support shaft B405 is located inside the mounting base B403; the preload support shaft B405 is connected to the mounting base B403 by a spring; the fixed base B406 is mounted on the moving part B401; a gear is provided at the bottom of the fixed base B406. The gear of the fixed base B406 is connected to the motor output shaft on the moving part B401; the gear of the fixed base B406 meshes with the rack B303; the mounting base B403 here is used to install the bolt B404 and the preload support shaft B405. By adjusting the bolt B404, it comes into contact with the preload support shaft B405 and compresses the spring, which then comes into contact with the side of the fixed base B406. A certain preload is given through elastic preload to eliminate meshing gap and ensure the accuracy during operation.

[0024] The specific usage and function of this embodiment are as follows: In this invention, when using the device, bolts A203 and B404 are adjusted so that they contact the preload support shafts A204 and B405 during movement. This causes the preload support shafts A204 and B405 to move and compress the spring, thereby causing them to contact the sides of the fixed bases A205 and B406 respectively. The elastic preload effectively eliminates the meshing accuracy between the gear and rack A102 / B303, thus improving the meshing precision of the double gear and rack A102 / B303. The meshing accuracy of rack B303 is ensured by using elastic preload to eliminate meshing backlash, guaranteeing operational accuracy and improving workpiece production quality during machining. Moving component A201 is driven by a motor to rotate the gear on fixed base A205, which meshes with rack A102, causing moving component A201 to move on slide rail A103, thus moving mounting component 301 along the Y-axis. Similarly, moving component B401 is driven by a motor to rotate the gear on fixed base B406, which meshes with rack B303, causing moving component B401 to move on slide rail B302, allowing column 402 and moving component B401 to move along the X-axis. A ball screw drives column 402 up and down, enabling the cutter on column 402 to adapt to workpieces of different heights.

Claims

1. A dual-motor parallel drive backlash elimination mechanism for a five-axis machining center, characterized in that: It includes a machining mechanism (1), a Y-axis moving mechanism (2), an installation mechanism (3), and an X-axis moving mechanism (4). The processing mechanism (1) is provided with a Y-axis moving mechanism (2); the mounting mechanism (3) is provided on the Y-axis moving mechanism (2); the X-axis moving mechanism (4) is provided on the mounting mechanism (3); The processing mechanism (1) includes: a main body (101), and racks A (102) are provided on both sides of the top of the main body (101). The Y-axis moving mechanism (2) includes: a moving part A (201), which is disposed on the top of the main body (101); two sets of motors are disposed on the top of the moving part A (201); a mounting seat A (202) is disposed at the bottom of the moving part A (201); a bolt A (203) is disposed on the mounting seat A (202); a preload support shaft A (204) is disposed on the mounting seat A (202); the preload support shaft A (204) is connected to the mounting seat A (202) by a spring; a fixed seat A (205) is disposed at the bottom of the moving part A (201); a gear is disposed on the fixed seat A (205); the gear on the fixed seat A (205) meshes with the rack A (102); and the side of the fixed seat A (205) contacts the preload support shaft A (204).

2. The dual-motor parallel drive backlash elimination mechanism for a five-axis machining center according to claim 1, characterized in that: The processing mechanism (1) further includes: slide rail A (103); The slide rail A (103) is fixedly installed on both sides of the top of the main body (101); a movable part A (201) is slidably installed on the slide rail A (103).

3. The dual-motor parallel drive backlash elimination mechanism for a five-axis machining center according to claim 1, characterized in that: The mounting base A (202) is correspondingly provided with the fixed base A (205); the bolt A (203) is in contact with the preload support shaft A (204); the mounting base A (202) is provided on the side of the fixed base A (205).

4. The dual-motor parallel drive backlash elimination mechanism for a five-axis machining center according to claim 1, characterized in that: The installation mechanism (3) includes: a mounting component (301), a slide rail B (302), and a rack B (303); Movable parts A (201) are provided on both sides of the bottom of the mounting part (301); the slide rail B (302) is provided on the mounting part (301); the rack B (303) is provided on the mounting part (301).

5. A dual-motor parallel drive backlash elimination mechanism for a five-axis machining center according to claim 4, characterized in that: The X-axis moving mechanism (4) includes: a moving part B (401) and a column (402). The movable component B (401) is slidably mounted on the slide rail B (302); two sets of motors are fixedly mounted on the movable component B (401); guide rails are provided on both sides of the movable component B (401); the column (402) is slidably connected to the movable component B (401) through the guide rails; the column (402) is connected to the movable component B (401) through a ball screw; a cutter is provided at the bottom of the column (402).

6. A dual-motor parallel drive backlash elimination mechanism for a five-axis machining center according to claim 5, characterized in that: The X-axis moving mechanism (4) further includes: mounting base B (403), bolt B (404), preload support shaft B (405) and fixed base B (406). The mounting base B (403) is disposed on the movable part B (401); the bolt B (404) is disposed on the mounting base B (403); the preload support shaft B (405) is disposed inside the mounting base B (403); the preload support shaft B (405) is connected to the mounting base B (403) by a spring; the fixed base B (406) is disposed on the movable part B (401); a gear is disposed at the bottom of the fixed base B (406); the gear of the fixed base B (406) is connected to the motor output shaft on the movable part B (401); the gear of the fixed base B (406) meshes with the rack B (303).

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