Feeding device of numerical control machine tool

Abstract

The invention belongs to the technical field of numerical control machine tool feeding, and particularly relates to a numerical control machine tool feeding device which comprises a feeding assembly, the feeding assembly comprises a movable support, a locking assembly is arranged in the movable support, a supporting frame is arranged on one side of the feeding assembly, and a clamping assembly is arranged in the supporting frame; the steel material conveying device has the advantages that the height of the steel material can be adjusted according to the height of a lathe while the steel material is conveyed, the ratchet plate A can limit the ratchet plate B when the sliding barrel moves to a proper position and stops, the sliding barrel is prevented from falling due to uncontrol, and the steel material can be clamped and prevented from sliding off during conveying.

Description

Technical Field

[0001] The invention belongs to the technical field of loading materials for numerically controlled machine tools, and in particular relates to a loading device for numerically controlled machine tools. Background Art

[0002] CNC lathe is one of the most widely used CNC machine tools. It is mainly used for cutting inner and outer cylindrical surfaces of shaft parts or disk parts, inner and outer conical surfaces of arbitrary taper angles, complex rotating inner and outer curved surfaces, and cylindrical and conical threads. It can also perform grooving, drilling, reaming, reaming and boring. CNC machine tools automatically process the parts to be processed according to a pre-compiled processing program.

[0003] We compile the processing route, process parameters, tool motion trajectory, displacement, cutting parameters and auxiliary functions of the parts into a processing program sheet according to the instruction code and program format specified by the CNC machine tool, and then record the contents of the program sheet on the control medium, and then input it into the CNC device of the CNC machine tool to command the machine tool to process the parts. The existing CNC lathe loading is basically carried by the operator manually, and the steel used in the lathe is basically cylindrical and heavy. When the steel is carried by the operator, it may fall due to lack of physical strength, which may easily cause the steel to be damaged due to falling and bumping, and it is also easy to injure the operator, which is very dangerous;

[0004] In order to solve the above problems, the present application proposes a feeding device for a CNC machine tool. Summary of the invention

[0005] In order to solve the problems raised in the above background technology, the present invention provides a feeding device for a CNC machine tool, which can realize the conveyance of steel materials and adjust the height of the steel materials according to the height of the lathe. When the sliding cylinder moves to a suitable position and stops, the ratchet plate A will limit the ratchet plate B to prevent the sliding cylinder from falling uncontrollably. The steel materials can be clamped to prevent them from slipping during conveyance.

[0006] To achieve the above object, the present invention provides the following technical solution: a feeding device for a CNC machine tool, comprising a feeding assembly, the feeding assembly comprising a movable bracket, a locking assembly is arranged inside the movable bracket, a support frame is arranged on one side of the feeding assembly, and a clamping assembly is arranged inside the support frame;

[0007] Two universal wheels are symmetrically installed on the surface of the mobile bracket, and two connecting frames are symmetrically fixedly connected to the surface of the mobile bracket, and an auxiliary wheel is rotatably connected inside each of the connecting frames. An electric push rod is installed inside the mobile bracket through a mounting seat, and the output shaft of the electric push rod is fixedly connected to a connecting rod, and two sprocket wheels A are symmetrically rotatably connected at both ends of the connecting rod. A fixed rod is provided inside the mobile bracket, and the fixed rod is fixedly connected to the mobile bracket, and two chains A are symmetrically fixedly connected to the surface of the fixed rod, and a positioning rod is slidably connected to the inside of the mobile bracket, and one end of the chain A away from the fixed rod is fixedly connected to the positioning rod, and the chain A is meshingly connected to the sprocket A, and two support rods are symmetrically fixedly connected to the surface of the positioning rod, and one end of the support rod away from the positioning rod is fixedly connected to a support frame.

[0008] As a preferred loading device for a CNC machine tool of the present invention, the movable bracket is symmetrically and fixedly connected with two positioning frames inside, and a sliding cylinder is sleeved on the surface of each positioning frame. The sliding cylinder and the positioning frame are slidably connected, and the two ends of the positioning rod are fixedly connected to the two sliding cylinders.

[0009] As a preferred loading device of a CNC machine tool of the present invention, two ratchet plates A are symmetrically arranged inside the positioning frame, two ratchet plates B are symmetrically arranged inside the sliding cylinder, the ratchet plates B are symmetrically arranged inside the sliding cylinder, the ratchet plates B are slidingly connected to the sliding cylinder, a plurality of springs A are evenly arranged inside the sliding cylinder, the two ends of the spring A are respectively fixedly connected to the sliding cylinder and the ratchet plate B, and the ratchet plate B is meshingly connected to the ratchet plate A.

[0010] As a preferred loading device of a CNC machine tool of the present invention, three elliptical blocks are evenly arranged inside the positioning frame, and the elliptical blocks are rotatably connected to the positioning frame. A sprocket B is fixedly connected to the surface of each elliptical block, and two chains B are staggered on the surface of the sprocket B located in the middle, and the chains B are meshed with each other, and the two chains B are respectively meshed with the remaining two sprockets B. Two knobs are symmetrically arranged on both sides of the movable bracket, and the knobs pass through the movable bracket and are fixedly connected to the sprocket B corresponding to them. The elliptical blocks are fitted with the two ratchet plates A, and two tension springs are symmetrically arranged inside the positioning frame, and the two ends of the tension springs are respectively fixedly connected to the two ratchet plates A.

[0011] As a preferred feeding device of a CNC machine tool of the present invention, a plurality of limit plates are evenly arranged inside the positioning frame, the limit plates are fixedly connected to the positioning frame, and the limit plates are evenly arranged around each of the elliptical blocks to limit the rotation angle of the elliptical blocks.

[0012] As a preferred feeding device of a CNC machine tool of the present invention, three positioning grooves are evenly opened on adjacent sides of the two ratchet plates A, each of the positioning grooves corresponds to the elliptical block, and the chain B is inserted inside the positioning grooves.

[0013] As a preferred feeding device of a CNC machine tool of the present invention, two bevel gears B are symmetrically arranged inside the support frame, and the bevel gear B is rotatably connected to the support frame. The surface of the bevel gear B is symmetrically meshed and connected to two bevel gears A. A double-end bevel gear rod B is rotatably connected inside the support frame, and the surface of the double-end bevel gear rod B is symmetrically meshed and connected to two double-end bevel gear rods A. The double-end bevel gear rod A is rotatably connected to the support frame, and one end of the double-end bevel gear rod A away from the double-end bevel gear rod B is meshed and connected to the bevel gear A. A positioning cylinder is fixedly connected inside the bevel gear A, and the positioning cylinder is rotatably connected to the support frame, and a screw is threadedly connected to the inside of each positioning cylinder, and a handle is fixedly connected to the surface of the bevel gear B on one side.

[0014] As a preferred loading device of a CNC machine tool of the present invention, a spring B is arranged inside the positioning cylinder, two positioning blocks are symmetrically fixedly connected to both ends of the spring B, the positioning block close to one end of the screw is rotatably connected to the screw, two clamping plates are symmetrically arranged inside the support frame, two limiting grooves are symmetrically opened on opposite sides of the two clamping plates, the positioning block away from the screw is inserted in the limiting groove and is rotatably connected to the clamping plate.

[0015] As a preferred feeding device of a numerically controlled machine tool of the present invention, one adjacent side of the two clamping plates is provided with a corrugated groove for increasing the friction with the steel material.

[0016] As a preferred feeding device of a numerically controlled machine tool of the present invention, a positioning wheel is provided inside the support frame, and the positioning wheel is rotatably connected to the support frame.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] A loading assembly is added to the present application, and the cooperation of the electric push rod, sprocket A and chain A can be utilized. The sprocket A is extended and moved by the output rod of the electric push rod, and the chain A is driven by the sprocket A to drive the support rod to move. While realizing the transportation of steel materials, the height of the steel materials can also be adjusted according to the height of the lathe. A locking assembly is also added, and the cooperation of the sliding cylinder, ratchet plate A and ratchet plate B can be utilized. Through the cooperation of ratchet plate A and ratchet plate B, when the sliding cylinder moves to a suitable position and stops, the ratchet plate A will limit the ratchet plate B, and the ratchet plate B will limit the sliding cylinder, providing a layer of protection for the sliding cylinder to prevent the sliding cylinder from falling uncontrollably. At the same time, a clamping assembly is added, and the cooperation of the splint, positioning cylinder and screw can be utilized to apply force to the handle to rotate it, thereby indirectly driving the positioning cylinders on both sides to rotate. When the positioning cylinder rotates, the screw will move in the direction of the steel material until the two splints and the steel material fit each other, thereby achieving the characteristics of clamping the steel material and preventing the steel material from slipping during transportation. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 It is a structural schematic diagram of the present invention;

[0021] Figure 2 It is a structural schematic diagram of the fixed rod and the chain A in the present invention;

[0022] Figure 3 It is a structural schematic diagram of the sprocket A and the chain A in the present invention;

[0023] Figure 4 It is a structural schematic diagram of the positioning frame and the ratchet plate A in the present invention;

[0024] Figure 5 It is a schematic diagram of the structure of the sprocket B and the chain B in the present invention;

[0025] Figure 6 It is a structural schematic diagram of a vertical cross section of a support frame in the present invention;

[0026] Figure 7 It is a structural schematic diagram of a vertical cross section of the positioning tube in the present invention;

[0027] Figure 8 For the present invention Figure 4 The enlarged view of point A in the middle;

[0028] Fig. 9 It is a schematic diagram of the structure of the elliptical block and the limiting plate in the present invention;

[0029] In the figure:

[0030] 1. Loading assembly; 11. Mobile bracket; 12. Universal wheel; 13. Connecting frame; 14. Auxiliary wheel; 15. Electric push rod; 16. Connecting rod; 17. Sprocket A; 18. Fixed rod; 19. Chain A; 110. Positioning rod; 111. Support rod; 112. Support frame;

[0031] 2. Locking assembly; 21. Positioning frame; 22. Sliding cylinder; 23. Ratchet plate A; 24. Ratchet plate B; 25. Spring A; 26. Knob; 27. Oval block; 28. Sprocket B; 29. ​​Chain B; 210. Limiting plate; 211. Positioning groove; 212. Tension spring;

[0032] 3. Clamping assembly; 31. Positioning cylinder; 32. Screw; 33. Bevel gear A; 34. Bevel gear B; 35. Spring B; 36. Positioning block; 37. Limiting groove; 38. Clamp; 39. Double-end bevel gear rod A; 310. Handle; 311. Double-end bevel gear rod B; 312. Positioning wheel. DETAILED DESCRIPTION

[0033] 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.

[0034] The standard parts used in this application can all be purchased from the market, and special-shaped parts can be customized according to the instructions and drawings. The specific connection methods of each part adopt conventional means such as mature bolts, rivets, welding, and bonding in the existing technology, and the components used for circuit connection are all conventional models in the existing technology.

[0035] At the same time, in order to clearly express the connection relationship and working principle between the components and highlight the key points, the drawings in the specification are organized and drawn in the form of simple diagrams. One simple diagram can correspond to a variety of materials and actual external structural shapes.

[0036] Example 1

[0037] like Figures 1 to 9 As shown;

[0038] Combining the above:

[0039] In order to prevent the steel material from falling when the worker manually moves the steel material, the feeding device of the CNC machine tool includes a feeding assembly 1, the feeding assembly 1 includes a moving bracket 11, a locking assembly 2 is arranged inside the moving bracket 11, a support frame 112 is arranged on one side of the feeding assembly 1, and a clamping assembly 3 is arranged inside the support frame 112;

[0040] Two universal wheels 12 are symmetrically installed on the surface of the mobile bracket 11, and two connecting frames 13 are symmetrically fixedly connected to the surface of the mobile bracket 11. The interior of each connecting frame 13 is rotatably connected to an auxiliary wheel 14. An electric push rod 15 is installed inside the mobile bracket 11 through a mounting seat. The output shaft of the electric push rod 15 is fixedly connected to a connecting rod 16. The two ends of the connecting rod 16 are symmetrically rotatably connected to two sprocket wheels A17. A fixed rod 18 is arranged inside the mobile bracket 11, and the fixed rod 18 is fixedly connected to the mobile bracket 11. Two chains A19 are symmetrically fixedly connected to the surface of the fixed rod 18. The frame 11 is internally slidably connected with a positioning rod 110, one end of a chain A19 away from the fixed rod 18 is fixedly connected to the positioning rod 110, the chain A19 is meshed with a sprocket A17, the surface of the positioning rod 110 is symmetrically fixedly connected with two support rods 111, one end of the support rod 111 away from the positioning rod 110 is fixedly connected with a support frame 112, the interior of the mobile bracket 11 is symmetrically fixedly connected with two positioning frames 21, the surface of each positioning frame 21 is sleeved with a sliding cylinder 22, the sliding cylinder 22 and the positioning frame 21 are slidably connected, and both ends of the positioning rod 110 are fixedly connected to the two sliding cylinders 22.

[0041] In this embodiment: when the steel material needs to be moved, the steel material is placed inside the two support frames 112, the steel material is limited by the two support frames 112, and then the movable bracket 11 is pushed, and the movable bracket 11 is moved by the universal wheel 12 and the auxiliary wheel 14 until the steel material is moved to the position of the CNC lathe, and then the height of the steel material needs to be adjusted according to the height of the lathe, so that the electric push rod 15 is connected to the external power supply and then started, the output shaft of the electric push rod 15 will extend upward, and the connecting rod 16 will drive the sprocket A17 to move upward. Because the sprocket A17 and the chain A19 are engaged with each other, the sprocket A17 will be driven to rotate by the chain A19, and the chain A19 will drive the support rod 111 to move upward through the positioning rod 110, so that the steel material can be driven by the support frame 112 to be adjusted according to the height of the lathe, and when the positioning rod 110 moves upward, it will drive the sliding cylinder 22 to slide on the surface of the positioning frame 21, and the positioning frame 21 will limit the sliding cylinder 22 to prevent displacement.

[0042] Going further:

[0043] In an optional embodiment, two ratchet plates A23 are symmetrically arranged inside the positioning frame 21, two ratchet plates B24 are symmetrically arranged inside the sliding cylinder 22, the ratchet plates B24 are symmetrically arranged inside the sliding cylinder 22, a plurality of springs A25 are evenly arranged inside the sliding cylinder 22, the two ends of the spring A25 are respectively fixedly connected to the sliding cylinder 22 and the ratchet plates B24, the ratchet plates B24 are meshed and connected with the ratchet plates A23,

[0044] In this embodiment: when the sliding cylinder 22 slides on the surface of the positioning frame 21, due to the cooperation between the ratchet plate A23 and the ratchet plate B24, when the sliding cylinder 22 moves upward, the ratchet plate B24 will move inside the sliding cylinder 22, and the spring A25 will be repeatedly compressed, so that the sliding cylinder 22 can move upward smoothly. When the sliding cylinder 22 moves to a suitable position and stops, the ratchet plate A23 will limit the ratchet plate B24, and the sliding cylinder 22 will be limited by the ratchet plate B24, providing a layer of protection for the sliding cylinder 22 to prevent the sliding cylinder 22 from falling uncontrollably.

[0045] Going further:

[0046] In an optional embodiment, three elliptical blocks 27 are evenly arranged inside the positioning frame 21, and the elliptical blocks 27 are rotatably connected to the positioning frame 21. A sprocket B28 is fixedly connected to the surface of each elliptical block 27, and two chains B29 are staggered on the surface of the middle sprocket B28. The chains B29 are meshed with each other, and the two chains B29 are respectively meshed with the remaining two sprockets B28. Two knobs 26 are symmetrically arranged on both sides of the movable bracket 11. The knobs 26 pass through the movable bracket 11 and are fixedly connected to the corresponding sprockets B28. The elliptical blocks 27 are fitted with two ratchet plates A23. Two tension springs 212 are symmetrically arranged inside the positioning frame 21, and the two ends of the tension springs 212 are respectively fixedly connected to the two ratchet plates A23.

[0047] In this embodiment: when it is necessary to move the sliding cylinder 22 downward, the knob 26 is rotated and force is applied. The rotation of the knob 26 drives the elliptical block 27 to rotate inside the positioning frame 21. When the elliptical block 27 rotates, the sprocket B28 is driven to rotate, thereby driving the other two elliptical blocks 27 to rotate through two chains B29 until they are rotated to ninety degrees in contact with the limiting plate 210, thereby releasing the limit of the two ratchet plates A23. The elastic potential energy of the two tension springs 212 pulls the two ratchet plates A23 toward the center, so that the ratchet plates A23 no longer mesh with the ratchet plates B24, and then the electric push rod 15 is started to shrink the output shaft of the electric push rod 15, thereby Move the movable bracket 11 downward. When locking is required, rotate the knob 26 in the opposite direction to make the elliptical block 27 slide out of the positioning groove 211. The elliptical block 27 is limited by the positioning groove 211 to prevent the elliptical block 27 from sliding. A plurality of limiting plates 210 are evenly arranged inside the positioning frame 21. The limiting plates 210 and the positioning frame 21 are fixedly connected. The limiting plates 210 are evenly arranged around each elliptical block 27 to limit the rotation angle of the elliptical block 27. Three positioning grooves 211 are evenly arranged on the adjacent sides of the two ratchet plates A23. Each positioning groove 211 corresponds to the elliptical block 27. The chain B29 is inserted into the positioning groove 211.

[0048] Going further:

[0049] In an optional embodiment, two bevel gears B34 are symmetrically arranged inside the support frame 112, and the bevel gear B34 is rotatably connected to the support frame 112. The surface of the bevel gear B34 is symmetrically meshed with two bevel gears A33. The inside of the support frame 112 is rotatably connected to a double-end bevel gear rod B311, and the surface of the double-end bevel gear rod B311 is symmetrically meshed with two double-end bevel gear rods A39. The double-end bevel gear rod A39 is rotatably connected to the support frame 112, and one end of the double-end bevel gear rod A39 away from the double-end bevel gear rod B311 is meshed with the bevel gear A33. The interior of the bevel gear A33 is fixedly connected to a positioning cylinder 31, and the positioning cylinder 31 and the support frame 112 are rotatably connected. The interior of each positioning cylinder 31 is threadedly connected with a screw rod 32, and a handle 310 is fixedly connected to the surface of a bevel gear B34 on one side. A spring B35 is arranged inside the positioning cylinder 31, and two positioning blocks 36 are symmetrically fixedly connected at both ends of the spring B35. The positioning block 36 near one end of the screw rod 32 is rotatably connected to the screw rod 32. Two clamping plates 38 are symmetrically arranged inside the support frame 112, and two limiting grooves 37 are symmetrically provided on opposite sides of the two clamping plates 38. The positioning block 36 away from the screw rod 32 is inserted into the limiting groove 37 and is rotatably connected to the clamping plate 38. A corrugated groove is provided on one adjacent side of the two clamping plates 38 to increase the friction with the steel material.

[0050] In this embodiment: after the steel material is placed inside the support frame 112, force is applied to the handle 310 to make it rotate, and the bevel gear B34 will rotate, thereby driving the two bevel gears A33 to rotate. The rotation of the bevel gear A33 will drive the double-end bevel gear rod B311 through the double-end bevel gear rod A39, thereby indirectly driving the bevel gear A33 on the other side to rotate, thereby driving the positioning cylinders 31 on both sides to rotate. When the positioning cylinder 31 rotates, the screw 32 will move in the direction of the steel material until the two clamping plates 38 and the steel material are in contact with each other. Because the steel material is a cylindrical structure, the contact between the two sides of the clamping plate 38 and the steel material will be uneven. When the steel material contacts one side of the clamping plate 38, the other side will continue to move until the clamping plate 38 tilts in the direction of the steel material, and the spring B35 on one side will be compressed, and the spring B35 on the other side will be bent until the clamping plate 38 and the surface of the steel material are in contact with each other, thereby achieving the clamping of the steel material and preventing the steel material from slipping during transportation.

[0051] Going further:

[0052] In an optional embodiment, a positioning wheel 312 is disposed inside the support frame 112 , and the positioning wheel 312 is rotatably connected to the support frame 112 .

[0053] In this embodiment, when the steel material and the lathe fixture are located on the same axis, the steel material is released from the clamping, and then the steel material is pushed, and the positioning wheel 312 will rotate, so that the steel material moves more smoothly and reduces friction.

[0054] The working principle and use process of the present invention:

[0055] When the steel material needs to be moved, the steel material is placed inside the two support frames 112, and the steel material is limited by the two support frames 112, and then the mobile bracket 11 is pushed, and the mobile bracket 11 is moved by the universal wheel 12 and the auxiliary wheel 14 until the steel material is moved to the position of the CNC lathe, and then the height of the steel material needs to be adjusted according to the height of the lathe, so that the electric push rod 15 is connected to the external power supply and then started, the output shaft of the electric push rod 15 will extend upward, and the connecting rod 16 will drive the sprocket A17 to move upward. Because the sprocket A17 and the chain A19 are meshed with each other, the sprocket A17 will be driven to rotate by the chain A19, and the chain A19 will drive the support rod 111 to move upward through the positioning rod 110, so that the steel material can be driven by the support frame 112 to be adjusted according to the height of the lathe;

[0056] When the positioning rod 110 moves upward, it will drive the sliding cylinder 22 to slide on the surface of the positioning frame 21, and the positioning frame 21 will limit the sliding cylinder 22 to prevent deviation. When the sliding cylinder 22 slides on the surface of the positioning frame 21, the ratchet plate A23 and the ratchet plate B24 cooperate with each other;

[0057] When the sliding cylinder 22 moves upward, the ratchet plate B24 moves inside the sliding cylinder 22, and the spring A25 is repeatedly compressed, so that the sliding cylinder 22 moves upward smoothly. When the sliding cylinder 22 moves to a suitable position and stops, the ratchet plate A23 limits the ratchet plate B24. The sliding cylinder 22 is limited by the ratchet plate B24, providing a layer of protection for the sliding cylinder 22 to prevent the sliding cylinder 22 from falling uncontrollably.

[0058] When it is necessary to move the sliding cylinder 22 downward, the knob 26 is rotated and applied with force. The rotation of the knob 26 will drive the elliptical block 27 to rotate inside the positioning frame 21. When the elliptical block 27 rotates, the sprocket B28 will be driven to rotate, thereby driving the other two elliptical blocks 27 to rotate through the two chains B29 until they are rotated to ninety degrees in contact with the limiting plate 210, thereby releasing the limit of the two ratchet plates A23. The elastic potential energy of the two tension springs 212 will pull the two ratchet plates A23 toward the center, so that the ratchet plates A23 no longer mesh with the ratchet plates B24. Then the electric push rod 15 is started to shrink the output shaft of the electric push rod 15, thereby moving the movable bracket 11 downward. When locking is required, the knob 26 is rotated in the opposite direction to make the elliptical block 27 slide out of the positioning groove 211. The positioning groove 211 will limit the elliptical block 27 to prevent the elliptical block 27 from sliding.

[0059] After the steel material is put into the support frame 112, force is applied to the handle 310 to make it rotate, and the bevel gear B34 will rotate to drive the two bevel gears A33 to rotate. The rotation of the bevel gear A33 will drive the double-end bevel gear rod B311 through the double-end bevel gear rod A39, thereby indirectly driving the bevel gear A33 on the other side to rotate, thereby driving the positioning cylinders 31 on both sides to rotate. When the positioning cylinder 31 rotates, the screw 32 will move in the direction of the steel material until the two clamping plates 38 fit the steel material.

[0060] Because the steel material has a cylindrical structure, the two sides of the splint 38 will be in uneven contact with the steel material. When the steel material contacts one side of the splint 38, the other side will continue to move until the splint 38 tilts toward the direction of the steel material. The spring B35 on one side will be compressed, and the spring B35 on the other side will bend until the splint 38 and the surface of the steel material fit together, thus clamping the steel material and preventing it from slipping during transportation. When the steel material and the lathe clamp are on the same axis, the clamping of the steel material is released, and then the steel material is pushed, and the positioning wheel 312 will rotate to make the steel material move more smoothly and reduce friction.

Claims

1. A feeding device for a CNC machine tool, characterized in that: The feeding assembly (1) comprises a movable bracket (11), a locking assembly (2) is arranged inside the movable bracket (11), a support frame (112) is arranged on one side of the feeding assembly (1), and a clamping assembly (3) is arranged inside the support frame (112); Two universal wheels (12) are symmetrically mounted on the surface of the mobile bracket (11); two connecting frames (13) are symmetrically fixedly connected to the surface of the mobile bracket (11); an auxiliary wheel (14) is rotatably connected to the interior of each connecting frame (13); an electric push rod (15) is mounted inside the mobile bracket (11) via a mounting seat; an output shaft of the electric push rod (15) is fixedly connected to a connecting rod (16); two ends of the connecting rod (16) are symmetrically rotatably connected to two sprocket wheels A (17); a fixed rod (18) is arranged inside the mobile bracket (11); the fixed rod (18) The movable bracket (11) is fixedly connected to the movable bracket (11); two chains A (19) are symmetrically fixedly connected to the surface of the fixed rod (18); a positioning rod (110) is slidably connected to the interior of the movable bracket (11); one end of the chain A (19) away from the fixed rod (18) is fixedly connected to the positioning rod (110); the chain A (19) and the sprocket A (17) are meshingly connected; two support rods (111) are symmetrically fixedly connected to the surface of the positioning rod (110); one end of the support rod (111) away from the positioning rod (110) is fixedly connected to a support frame (112).

2. The feeding device for a CNC machine tool according to claim 1, characterized in that: Two positioning frames (21) are symmetrically and fixedly connected inside the movable bracket (11), and a sliding cylinder (22) is sleeved on the surface of each positioning frame (21). The sliding cylinder (22) and the positioning frame (21) are slidably connected, and the two ends of the positioning rod (110) are fixedly connected to the two sliding cylinders (22).

3. The feeding device for a CNC machine tool according to claim 2, characterized in that: Two ratchet plates A (23) are symmetrically arranged inside the positioning frame (21), and two ratchet plates B (24) are symmetrically arranged inside the sliding cylinder (22). The ratchet plates B (24) and the sliding cylinder (22) are slidably connected. A plurality of springs A (25) are evenly arranged inside the sliding cylinder (22), and the two ends of the springs A (25) are respectively fixedly connected to the sliding cylinder (22) and the ratchet plates B (24), and the ratchet plates B (24) and the ratchet plates A (23) are meshingly connected.

4. The feeding device for a CNC machine tool according to claim 3, characterized in that: Three elliptical blocks (27) are evenly arranged inside the positioning frame (21), and the elliptical blocks (27) are rotatably connected to the positioning frame (21). A sprocket B (28) is fixedly connected to the surface of each elliptical block (27). Two chains B (29) are staggeredly arranged on the surface of the sprocket B (28) located in the middle. The chains B (29) are meshed with each other, and the two chains B (29) are respectively meshed with the remaining two sprockets B (28). Two knobs (26) are symmetrically arranged on both sides of the movable bracket (11), and the knobs (26) penetrate the movable bracket (11) and are fixedly connected to the corresponding sprockets B (28). The elliptical blocks (27) and the two ratchet plates A (23) are mutually fitted. Two tension springs (212) are symmetrically arranged inside the positioning frame (21), and the two ends of the tension spring (212) are respectively fixedly connected to the two ratchet plates A (23).

5. The feeding device for a CNC machine tool according to claim 4, characterized in that: A plurality of limiting plates (210) are evenly arranged inside the positioning frame (21), the limiting plates (210) and the positioning frame (21) are fixedly connected, and the limiting plates (210) are evenly arranged around each of the elliptical blocks (27) to limit the rotation angle of the elliptical blocks (27).

6. The feeding device for a CNC machine tool according to claim 5, characterized in that: Three positioning grooves (211) are evenly arranged on adjacent surfaces of the two ratchet plates A (23), each positioning groove (211) corresponds to the elliptical block (27), and the chain B (29) is inserted into the positioning groove (211).

7. The feeding device for a CNC machine tool according to claim 6, characterized in that: Two bevel gears B (34) are symmetrically arranged inside the support frame (112), and the bevel gears B (34) are rotatably connected to the support frame (112). The surfaces of the bevel gears B (34) are symmetrically meshed with two bevel gears A (33). A double-end bevel gear rod B (311) is rotatably connected inside the support frame (112), and the surfaces of the double-end bevel gear rod B (311) are symmetrically meshed with two double-end bevel gear rods A (39). The double-end bevel gear rod A (39) and the The support frame (112) is rotatably connected, one end of the double-end bevel gear rod A (39) away from the double-end bevel gear rod B (311) is meshed with the bevel gear A (33), a positioning cylinder (31) is fixedly connected inside the bevel gear A (33), the positioning cylinder (31) and the support frame (112) are rotatably connected, each positioning cylinder (31) is threadedly connected inside with a screw rod (32), and a handle (310) is fixedly connected to the surface of the bevel gear B (34) on one side.

8. The feeding device for a CNC machine tool according to claim 7, characterized in that: A spring B (35) is arranged inside the positioning cylinder (31), and two positioning blocks (36) are symmetrically fixedly connected at both ends of the spring B (35). The positioning block (36) close to one end of the screw rod (32) is rotatably connected to the screw rod (32). Two clamping plates (38) are symmetrically arranged inside the support frame (112), and two limiting grooves (37) are symmetrically provided on opposite sides of the two clamping plates (38). The positioning block (36) away from the screw rod (32) is inserted into the limiting groove (37) and is rotatably connected to the clamping plate (38).

9. The feeding device for a CNC machine tool according to claim 8, characterized in that: One adjacent side of the two clamping plates (38) is provided with corrugated grooves for increasing the friction with the steel material.

10. The feeding device for a CNC machine tool according to claim 9, characterized in that: A positioning wheel (312) is arranged inside the support frame (112), and the positioning wheel (312) is rotatably connected to the support frame (112).

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