A high-efficiency CNC machine tool

Abstract

The present invention belongs to the technical field of workpiece processing, and discloses a high-efficiency CNC machine tool, comprising a machine tool transposition arm assembly, wherein a diameter-changing arm assembly is arranged at one end of the machine tool transposition arm assembly, and a workpiece supporting arm assembly is arranged at the other end of the machine tool transposition arm assembly. Through the meshing and diameter-changing of the diameter-changing arm assembly, the workpiece supporting arm assembly forms a follow-up type non-face-changing processing supporting arm structure and a follow-up type fixed-angle face-changing processing supporting arm structure on the machine tool transposition arm assembly. In short, when the wheel body diameter formed by the first diameter-changing cone wheel and the second diameter-changing cone wheel is consistent with the pulley diameter, the workpiece on the supporting platform will not change its face during the swing through the offset of reverse rotation and swing. Similarly, when the wheel body diameter formed between the second diameter-changing cone wheel and the first diameter-changing cone wheel is twice the diameter of the pulley, the workpiece on the supporting platform will change its face by ninety degrees during the swing. In this way, high efficiency and uniform adaptability are achieved in the transposition processing and face-changing processing of the workpiece.

Description

Technical Field

[0001] The invention belongs to the technical field of workpiece processing, and in particular relates to a high-efficiency numerically controlled machine tool. Background Art

[0002] With the growing demand for domestic CNC machine tools, the development of CNC machine tools has promoted the innovation and upgrading of CNC machine tool functional components. The innovation and upgrading of functional components have further improved the precision and efficiency of workpiece processing.

[0003] An integrated drilling and grinding equipment for machining with publication number CN118789301A and an integrated metal part cutting and polishing device with publication number CN118789297A both involve the equipment's multi-process processing of workpieces, which improves the efficiency and accuracy of mechanical processing, but still faces the following technical problems: when CNC machine tools perform continuous processing of workpieces such as welding, cutting, grinding and milling, it is necessary to adjust and process different surfaces of the workpiece after the adjustment, and the workpiece needs to be transposed at different processing positions. At present, CNC machine tools cannot achieve good adjustment in the transposition and face-changing processing of workpieces. Simply put, when the workpiece moves from the first processing position to the second processing position, during the movement and transposition process, for different workpieces, it is necessary to keep the processing surface of the workpiece unchanged or rotate the processing surface of the workpiece by a certain angle during the transposition. At present, CNC machine tools have poor coordination and applicability in transposition and face-changing processing, resulting in low workpiece processing efficiency. Therefore, this problem is urgently needed. Summary of the invention

[0004] In order to solve the problems raised in the above background technology, the present invention provides a high-efficiency CNC machine tool, which has the characteristics of convenient position and surface change processing.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a high-efficiency CNC machine tool, comprising a machine tool transposition arm assembly, wherein a diameter-changing arm assembly is arranged at one end of the machine tool transposition arm assembly, and a workpiece supporting arm assembly is arranged at the other end of the machine tool transposition arm assembly. As the workpiece supporting arm assembly rotates and transposes the processing position on the machine tool transposition arm assembly, the workpiece supporting arm assembly forms a follow-up non-changing surface processing supporting arm structure and a follow-up fixed-angle changing surface processing supporting arm structure on the machine tool transposition arm assembly through the engagement and diameter change of the diameter-changing arm assembly.

[0006] In a preferred solution of a high-efficiency CNC machine tool, the machine tool transposition arm assembly comprises a U-shaped arm, a mounting seat is fixedly arranged on the back of the U-shaped arm, and a transposition motor for driving the transposition shaft arm to rotate is arranged on the top of the U-shaped arm, a support arm is fixedly arranged on the transposition shaft arm, a U-shaped base frame is fixedly arranged below the support arm through an L-shaped side arm, a square sliding rod is fixedly arranged inside the U-shaped base frame, sliding seat blocks are slidably arranged at both ends of the square sliding rod, a roller column is rotatably arranged on the top of the sliding seat block, a push spring is arranged between the two sliding seat blocks, and belts are sleeved on the outside of the two roller columns;

[0007] The diameter-changing arm assembly comprises a vertical arm frame, on both sides of the vertical arm frame, a second transposition tooth arm and a first transposition tooth arm are slidably arranged through a guide rail slot and a guide rail slider, a second diameter-changing cone wheel is fixedly arranged on the first transposition tooth arm, a first diameter-changing cone wheel is fixedly arranged on the second transposition tooth arm, a transposition gear is rotatably arranged in the middle of the vertical arm frame, and a cylinder is fixedly arranged at the bottom of the vertical arm frame;

[0008] The workpiece supporting arm assembly includes a supporting platform, on which a plurality of cross-shaped sliders are slidingly arranged through cross-shaped slide grooves, a clamping arm and a toggle arm are fixedly arranged on the top and bottom of the cross-shaped sliders, respectively, a supporting shaft is fixedly arranged at the bottom of the supporting platform, and an active motor is fixedly arranged on one side of the supporting platform, a driving gear is arranged on the output shaft of the active motor, a folding driving gear is rotatably arranged in the middle of the supporting shaft, and a pulley is fixedly arranged at the bottom of the supporting shaft, and a plurality of arc-shaped slide grooves are opened on the folding driving gear.

[0009] In a preferred embodiment of a high-efficiency CNC machine tool, the second transposition tooth arm and the first transposition tooth arm slide on the vertical arm frame, the second transposition tooth arm engages with one side of the transposition gear, and the first transposition tooth arm engages with the other side of the transposition gear.

[0010] In a preferred solution for a high-efficiency CNC machine tool, the top of the cylinder is fixedly connected to the first transposition tooth arm, and the bottom of the vertical arm frame is fixedly arranged on the bottom frame of the U-shaped arm.

[0011] In a preferred solution for an efficient CNC machine tool, the folding drive gear is rotatably arranged below the supporting platform, the toggle arm is inserted into an arc-shaped slide groove on the folding drive gear, and the driving gear is meshed with the folding drive gear.

[0012] In a preferred solution of a high-efficiency CNC machine tool, the support shaft is rotatably arranged at the distal end of the support arm through a bearing, and the belt sleeve is arranged between the belt pulley and the first and second diameter-changing cone wheels.

[0013] In a preferred solution for a high-efficiency CNC machine tool, through the tightening of the push spring, the two rollers respectively abut against both sides of the middle of the belt and form a self-tensioning abutting roller structure of the belt.

[0014] In a preferred solution of a high-efficiency CNC machine tool, the first diameter-changing cone wheel and the second diameter-changing cone wheel are slidably arranged on the vertical arm frame, and the first diameter-changing cone wheel and the second diameter-changing cone wheel form a wheel body structure on the vertical arm frame that approaches and moves away synchronously.

[0015] Compared with the prior art, the beneficial effects of the present invention are as follows: in general, when in use, the machine tool transposition arm assembly is fixed at the reserved position of the machine tool through the mounting seat and the fastening bolts, and at this time, the front end of the support arm rotates to correspond to multiple workpiece processing positions, and as the workpiece supporting arm assembly rotates at the processing position on the machine tool transposition arm assembly, the workpiece supporting arm assembly forms a follow-up non-face-changing processing supporting arm structure and a follow-up fixed-angle face-changing processing supporting arm structure on the machine tool transposition arm assembly through the meshing and diameter-changing arm assembly. When in use, the workpiece is placed on the supporting table, and at this time, the active motor drives the retracting drive gear to rotate clockwise through the active gear, and the retracting drive gear rotates clockwise. When rotating clockwise, the toggle arm is retracted and toggled through the arc-shaped slide groove. At this time, multiple clamping arms are clamped and fixed on the support platform to retract the workpiece synchronously. In this way, on the one hand, it is convenient to clamp and fix the workpiece and release the limit fixation. On the other hand, it is convenient to fix the workpiece to the center limit. By changing the spacing between the second diameter-changing cone wheel and the first diameter-changing cone wheel, this spacing change causes the wheel body diameter of the driving wheel at one end of the belt to change. In simple terms, when the wheel body diameter formed by the first diameter-changing cone wheel and the second diameter-changing cone wheel is consistent with the pulley diameter, at this time, when the support arm is transposed and swung, since the second diameter-changing cone wheel and the first diameter-changing cone wheel are fixed, At this time, through the traction of the belt, the supporting shaft forms a reverse rotation structure on the supporting arm. In simple terms, when the supporting arm swings a certain degree, the supporting shaft drives the supporting platform to rotate in the opposite direction a certain degree. Through the offset of this reverse rotation and swinging, the workpiece on the supporting platform will not change sides when swinging. Similarly, when the wheel diameter formed between the second diameter-changing cone wheel and the first diameter-changing cone wheel is twice the diameter of the pulley, when the supporting arm changes position and swings, since the second diameter-changing cone wheel and the first diameter-changing cone wheel are fixed, at ... Degrees, at this time, the supporting shaft drives the supporting platform to rotate in the opposite direction by double the angle, through the difference between this reverse rotation and the swing angle, the workpiece on the supporting platform changes its face by 90 degrees when swinging, through this method, when the workpiece supporting arm assembly is rotated in the processing position on the machine tool positioning arm assembly, through the meshing and diameter changing of the diameter changing arm assembly, the workpiece supporting arm assembly forms a follow-up type non-face changing processing supporting arm action and a follow-up type fixed-angle face changing processing supporting arm action on the machine tool positioning arm assembly, and through the meshing and diameter changing of the diameter changing arm assembly, the follow-up face changing angle is adjustable. In this way, high efficiency and adaptability are achieved in the position changing and face changing processing of the workpiece. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A perspective view of the present invention;

[0017] Figure 2 A three-dimensional diagram of another viewing angle of the present invention;

[0018] Figure 3 An exploded view of the present invention;

[0019] Figure 4 An exploded view of the machine tool transposition arm assembly of the present invention;

[0020] Figure 5 A three-dimensional diagram of a diameter-changing arm assembly of the present invention;

[0021] Figure 6 An exploded view of the diameter change arm assembly of the present invention;

[0022] Figure 7 A three-dimensional diagram of a workpiece supporting arm assembly of the present invention;

[0023] In the figure: 100, machine tool transposition arm assembly; 101, U-shaped arm; 102, mounting seat; 103, transposition shaft arm; 104, transposition motor; 105, support arm; 106, push spring; 107, L-shaped side arm; 108, roller; 109, belt; 110, U-shaped base frame; 111, sliding seat block; 112, square slide bar; 200, diameter change arm assembly; 201, guide rail slide; 202, transposition gear; 203, cylinder; 204, second diameter change cone wheel; 205, first transposition tooth arm; 206, guide rail slider; 207, second transposition tooth arm; 208, first diameter-changing cone wheel; 209, vertical arm frame; 300, workpiece supporting arm assembly; 301, supporting platform; 302, cross-shaped slide; 303, arc-shaped slide; 304, retracting drive gear; 305, supporting shaft; 306, pulley; 307, toggle arm; 308, cross-shaped slider; 309, driving gear; 310, driving motor; 311, clamping arm. DETAILED DESCRIPTION

[0024] 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.

[0025] See also Figure 1-Figure 7As shown, the present invention provides a high-efficiency CNC machine tool, including a machine tool transposition arm assembly 100, wherein a diameter-changing arm assembly 200 is provided at one end of the machine tool transposition arm assembly 100, and a workpiece supporting arm assembly 300 is provided at the other end of the machine tool transposition arm assembly 100. As the workpiece supporting arm assembly 300 is transposed and rotated at the processing position on the machine tool transposition arm assembly 100, the workpiece supporting arm assembly 300 forms a follow-up non-face-changing processing supporting arm structure and a follow-up fixed-angle face-changing processing supporting arm structure on the machine tool transposition arm assembly 100 through the meshing and diameter-changing of the diameter-changing arm assembly 200.

[0026] In a preferred embodiment, please refer to Figure 4 The machine tool transposition arm assembly 100 includes a U-shaped arm 101, a mounting seat 102 is fixedly provided on the back of the U-shaped arm 101, and a transposition motor 104 for driving the transposition shaft arm 103 to rotate is provided on the top of the U-shaped arm 101, a support arm 105 is fixedly provided on the transposition shaft arm 103, and a U-shaped base frame 110 is fixedly provided below the support arm 105 through an L-shaped side arm 107, a square slide bar 112 is fixedly provided inside the U-shaped base frame 110, and sliding seats 111 are slidably provided at both ends of the square slide bar 112, and a roller 108 is rotatably provided on the top of the sliding seat block 111, a push spring 106 is provided between the two sliding seat blocks 111, and a belt 109 is provided on the outside of the two rollers 108, and through the tightening of the push spring 106, the two rollers 108 respectively contact the two sides of the middle part of the belt 109 and form a self-tensioning contact roller structure of the belt 109.

[0027] In a preferred embodiment, please refer to Figure 5 and Figure 6 The diameter-changing arm assembly 200 includes a vertical arm frame 209, on both sides of which a second transposition tooth arm 207 and a first transposition tooth arm 205 are slidably arranged through a guide rail slot 201 and a guide rail slider 206, a second diameter-changing cone wheel 204 is fixedly arranged on the first transposition tooth arm 205, and a first diameter-changing cone wheel 208 is fixedly arranged on the second transposition tooth arm 207. A transposition gear 202 is rotatably arranged in the middle of the vertical arm frame 209, and a cylinder 203 is fixedly arranged at the bottom of the vertical arm frame 209. The first diameter-changing cone wheel 208 and the second diameter-changing cone wheel 204 are rotatably arranged. The pair is slidingly arranged on the vertical arm 209, and the first diameter-changing cone wheel 208 and the second diameter-changing cone wheel 204 form a wheel body structure on the vertical arm 209 that approaches and moves away synchronously. The second transposition tooth arm 207 and the first transposition tooth arm 205 slide on the vertical arm 209, the second transposition tooth arm 207 is meshed with one side of the transposition gear 202, and the first transposition tooth arm 205 is meshed with the other side of the transposition gear 202, the top of the cylinder 203 is fixedly connected to the first transposition tooth arm 205, and the bottom of the vertical arm 209 is fixedly arranged on the bottom frame of the U-shaped arm 101.

[0028] In a preferred embodiment, please refer to Figure 7 The workpiece support arm assembly 300 includes a support platform 301, on which a plurality of cross-shaped sliders 308 are slidably arranged through a cross-shaped slide groove 302, and a clamping arm 311 and a toggle arm rod 307 are fixedly arranged on the top and bottom of the cross-shaped slider 308, respectively, a support shaft rod 305 is fixedly arranged at the bottom of the support platform 301, and an active motor 310 is fixedly arranged on one side of the support platform 301, and an active gear 309 is arranged on the output shaft of the active motor 310, and a folding driving gear 304 is rotatably arranged in the middle of the support shaft rod 305, and the support A pulley 306 is fixedly set at the bottom of the carrying shaft 305, and a plurality of arc-shaped grooves 303 are opened on the folding drive gear 304. The folding drive gear 304 is rotatably set under the supporting platform 301. The toggle arm 307 is inserted into the arc-shaped groove 303 on the folding drive gear 304, and the driving gear 309 is engaged with the folding drive gear 304. The carrying shaft 305 is rotatably set at the far end of the support arm 105 through a bearing. At this time, the belt 109 is sleeved between the pulley 306 and the first and second diameter-changing cone wheels 208 and 204.

[0029] In summary, when in use, the machine tool transposition arm assembly 100 is fixed at the reserved position of the machine tool through the mounting seat 102 and the fastening bolts. At this time, the front end of the support arm 105 rotates to correspond to multiple workpiece processing positions. As the workpiece supporting arm assembly 300 rotates the processing position on the machine tool transposition arm assembly 100, the workpiece supporting arm assembly 300 forms a follow-up non-face-changing processing supporting arm structure and a follow-up fixed-angle face-changing processing supporting arm structure on the machine tool transposition arm assembly 100 through the meshing and diameter-changing arm assembly 200. When in use, the workpiece is placed on the supporting platform 301. At this time, the active motor 310 drives the folding driving gear 304 to rotate clockwise through the active gear 309. When the folding driving gear 304 rotates clockwise, the arc-shaped slide groove 303 retracts the toggle arm 307. At this time, multiple clamping arms 311 are used on the supporting platform 301 to clamp and fix the workpiece inwardly. In this way, on the one hand, it is convenient to clamp and fix the workpiece and release the limit fixation, and on the other hand, it is convenient to clamp and fix the workpiece at the center.

[0030] On the basis of the above, that is, when the workpiece is fixed on the workpiece supporting arm assembly 300, the transposition motor 104 drives the transposition shaft arm 103 and the support arm 105 to rotate. At this time, the workpiece supporting arm assembly 300 at the end of the support arm 105 rotates synchronously, and the transposition rotation of the workpiece processing position can be realized. When the support arm 105 rotates and transposes, the diameter-changing arm assembly 200 can be adjusted to realize the follow-up non-face-changing processing supporting arm and the follow-up fixed-angle face-changing processing supporting arm of the workpiece on the workpiece supporting arm assembly 300. The specific working principle is as follows: the first diameter-changing cone wheel 208 and the second diameter-changing cone wheel 204 of the present invention are slidably arranged on the vertical arm frame 209, and the first diameter-changing cone wheel 208 and the second diameter-changing cone wheel 204 form the same on the vertical arm frame 209. The wheel structure that approaches and moves away synchronously, that is, one end of the belt 109 is sleeved on the pulley 306, and the other end of the belt 109 is sleeved on the second diameter-changing cone wheel 204 and the first diameter-changing cone wheel 208. In actual use, the first transposition tooth arm 205 is driven by the cylinder 203 to slide up and down. When the first transposition tooth arm 205 slides up and down, the second transposition tooth arm 207 is meshed with one side of the transposition gear 202, and the first transposition tooth arm 205 is meshed with the other side of the transposition gear 202. At this time, the first diameter-changing cone wheel 208 and the second diameter-changing cone wheel 204 form a wheel structure that approaches and moves away synchronously on the vertical arm frame 209. In this way, the change in the spacing between the second diameter-changing cone wheel 204 and the first diameter-changing cone wheel 208 is realized. This spacing change makes the belt 109 move closer and farther away from each other. The wheel diameter of the driving wheel at one end of the belt 109 changes. In simple terms, when the wheel diameter formed by the first diameter-changing cone wheel 208 and the second diameter-changing cone wheel 204 is consistent with the diameter of the pulley 306, when the support arm 105 changes position and swings, since the second diameter-changing cone wheel 204 and the first diameter-changing cone wheel 208 are fixed, the support shaft rod 305 forms a reverse rotation structure on the support arm 105 through the traction of the belt 109. In simple terms, when the support arm 105 swings a certain degree, the support shaft rod 305 drives the support platform 301 to rotate in the opposite direction by a certain degree. Through the offset of this reverse rotation and swinging, the workpiece on the support platform 301 will not change sides when swinging. Similarly, when the second diameter-changing cone wheel 204 and the first diameter-changing cone wheel 2 08 is twice the diameter of the pulley 306. At this time, when the support arm 105 is transposed and swung, since the second diameter-changing cone wheel 204 and the first diameter-changing cone wheel 208 are fixed, the support shaft rod 305 forms a reverse rotation structure on the support arm 105 through the traction of the belt 109. In simple terms, when the support arm 105 swings a certain degree, the support shaft rod 305 drives the support platform 301 to rotate in the reverse direction by double the angle. Through the difference between the reverse rotation and the swing angle, the workpiece on the support platform 301 changes face by 90 degrees when swinging. In this way, when the workpiece support arm assembly 300 is transposed and rotated on the machine tool transposition arm assembly 100, the diameter change is achieved through the meshing and diameter change of the diameter-changing arm assembly 200.The workpiece support arm assembly 300 forms a follow-up non-face-changing support arm action and a follow-up fixed-angle face-changing support arm action on the machine tool transposition arm assembly 100, and the follow-up face-changing angle is adjustable through the meshing and diameter-changing arm assembly 200. In this way, high efficiency and uniform adaptability are achieved in the transposition and face-changing processing of the workpiece.

[0031] On the basis of the above, when the diameter is changed through the engagement of the diameter-changing arm assembly 200, there is a problem of tightness of the belt 109 between the fixed wheel and the rotating wheel. Both ends of the square slide bar 112 of the present invention are slidably provided with sliding seat blocks 111, and the top of the sliding seat block 111 is rotatably provided with a roller 108, and a push spring 106 is provided between the sliding seat blocks 111, and the two rollers 108 are externally sleeved with a belt 109. Through the tightening of the push spring 106, the two rollers 108 respectively contact the two sides of the middle part of the belt 109 and form a self-tensioning contact roller structure of the belt 109. In this way, the belt 109 can be always tensioned between the fixed wheel and the rotating wheel, thereby ensuring the reliability of the above-mentioned follow-up type non-changing face processing support arm action and the follow-up type fixed-angle changing face processing support arm action.

[0032] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-efficiency CNC machine tool, comprising a machine tool transposition arm assembly (100), characterized in that: A diameter-changing arm assembly (200) is provided at one end of the machine tool transposition arm assembly (100), and a workpiece supporting arm assembly (300) is provided at the other end of the machine tool transposition arm assembly (100); as the workpiece supporting arm assembly (300) is transposed and rotated at the processing position on the machine tool transposition arm assembly (100), the workpiece supporting arm assembly (300) forms a follow-up non-face-changing processing supporting arm structure and a follow-up fixed-angle face-changing processing supporting arm structure on the machine tool transposition arm assembly (100) through the meshing and diameter-changing of the diameter-changing arm assembly (200); The machine tool transposition arm assembly (100) comprises a U-shaped arm (101), a mounting seat (102) is fixedly arranged on the back of the U-shaped arm (101), and a transposition motor (104) for driving a transposition shaft arm (103) to rotate is arranged on the top of the U-shaped arm (101), a support arm (105) is fixedly arranged on the transposition shaft arm (103), a U-shaped base frame (110) is fixedly arranged below the support arm (105) via an L-shaped side arm (107), a square sliding rod (112) is fixedly arranged inside the U-shaped base frame (110), sliding seat blocks (111) are slidably arranged at both ends of the square sliding rod (112), a roller column (108) is rotatably arranged on the top of the sliding seat block (111), a push spring (106) is abutted against each other between two sliding seat blocks (111), and belts (109) are sleeved on the outside of two roller columns (108); The diameter-changing arm assembly (200) comprises a vertical arm frame (209), a second transposition tooth arm (207) and a first transposition tooth arm (205) are slidably arranged on both sides of the vertical arm frame (209) through a guide rail slot (201) and a guide rail slider (206), a second diameter-changing cone wheel (204) is fixedly arranged on the first transposition tooth arm (205), and a first diameter-changing cone wheel (208) is fixedly arranged on the second transposition tooth arm (207), a transposition gear (202) is rotatably arranged in the middle of the vertical arm frame (209), and a cylinder (203) is fixedly arranged at the bottom of the vertical arm frame (209); The second transposition tooth arm (207) and the first transposition tooth arm (205) slide on the vertical arm frame (209), the second transposition tooth arm (207) meshes with one side of the transposition gear (202), and the first transposition tooth arm (205) meshes with the other side of the transposition gear (202); The top of the cylinder (203) is fixedly connected to the first transposition tooth arm (205), and the bottom of the vertical arm frame (209) is fixedly arranged on the bottom frame of the U-shaped arm (101); The first diameter-changing cone wheel (208) and the second diameter-changing cone wheel (204) are arranged on the vertical arm frame (209) in a slidable manner opposite to each other, and the first diameter-changing cone wheel (208) and the second diameter-changing cone wheel (204) form a wheel body structure on the vertical arm frame (209) that moves toward and away from each other synchronously; The workpiece supporting arm assembly (300) comprises a supporting platform (301), on which a plurality of cross-shaped sliders (308) are slidably arranged via a cross-shaped slide groove (302), a clamping arm (311) and a toggle arm (307) are fixedly arranged at the top and bottom of the cross-shaped slider (308), respectively, a supporting shaft (305) is fixedly arranged at the bottom of the supporting platform (301), and an active motor (310) is fixedly arranged at one side of the supporting platform (301), an active gear (309) is arranged on the output shaft of the active motor (310), a folding driving gear (304) is rotatably arranged at the middle of the supporting shaft (305), and a pulley (306) is fixedly arranged at the bottom of the supporting shaft (305), and a plurality of arc-shaped slide grooves (303) are provided on the folding driving gear (304).

2. A high-efficiency CNC machine tool according to claim 1, characterized in that: The folding drive gear (304) is rotatably arranged below the supporting platform (301), the toggle arm (307) is inserted into the arc-shaped slide groove (303) on the folding drive gear (304), and the driving gear (309) is meshed with the folding drive gear (304).

3. The high-efficiency CNC machine tool according to claim 1, characterized in that: The supporting shaft (305) is rotatably arranged at the far end of the support arm (105) via a bearing, and the belt (109) is sleeved between the belt pulley (306) and the first diameter-changing cone wheel (208) and the second diameter-changing cone wheel (204).

4. The high-efficiency CNC machine tool according to claim 1, characterized in that: Through the tightening of the push spring (106), the two rollers (108) respectively contact the two sides of the middle of the belt (109) to form a self-tensioning contact roller structure of the belt (109).

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