Rotary center frame of numerical control lathe

Abstract

The utility model relates to the technical field of center frames, and discloses a rotary center frame of a numerical control lathe, which comprises a base and a positioning frame, the surface of the positioning frame is fixedly connected with a bracket, the inner side of the bracket is fixedly connected with a motor, a control part for preventing excessive clamping is arranged in the positioning frame, and the control part comprises a connecting box, a connecting rod and a rotating shaft, according to the rotary center frame of the numerical control lathe, when a friction wheel at the top end of a connecting column abuts against a pipe and a moving block continues to move, a sliding block on the side face of the connecting column can slide in a sliding groove, the connecting column is oppositely inserted into the moving block, then a top block abuts against the inner wall of the moving block, and further the top block oppositely pushes a hinge block; the hinge block pushes the hinge rod, the hinge rod rotates to a certain degree and pushes the push rod, the push rod pushes the limiting strip to be clamped between the clamping teeth, and therefore the connecting column cannot continue to move, and the situation that the pipe with the thin pipe wall deforms and sinks due to the fact that the clamping force of the instrument is too large is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of a center frame, in particular to a rotary center frame of a numerically controlled lathe. Background Art

[0002] The rotary center frame of a CNC lathe is a device used to support and position the workpiece. It is usually installed on the worktable of the CNC lathe and can move along the X-axis and Y-axis of the worktable. The main function of the rotary center frame is to fix the workpiece in the correct position during the machining process to ensure machining accuracy and surface quality. It can be adjusted manually or automatically to accommodate workpieces of different shapes and sizes.

[0003] According to a disclosed rotary center frame of a CNC lathe (Announcement No.: CN220636957U), in the above application, when finishing some thin-walled pipes, the clamping force of the instrument is too great, which may cause the pipe to sag inward, thus affecting the use of the pipe. Summary of the invention

[0004] The purpose of the utility model is to provide a rotary center frame of a CNC lathe to solve the problems raised in the above background technology.

[0005] To achieve the above object, the utility model provides the following technical solution: a rotary center frame of a CNC lathe, comprising a base and a positioning frame, a bracket is fixedly connected to the surface of the positioning frame, a motor is fixedly connected to the inner side of the bracket, and a control unit for preventing excessive clamping is arranged inside the positioning frame, and the control unit comprises:

[0006] A connecting box, the bottom surface of the connecting box is fixedly connected to the top surface of the positioning frame, the surface of the connecting box passes through and is rotatably connected with a rotating shaft, the end of the rotating shaft close to the motor is fixedly connected to the output shaft of the motor, and the end of the rotating shaft away from the motor passes through and is fixedly connected with a pinion, the inner wall of the positioning frame is rotatably connected with a gear plate, and the pinion gear is meshed with the gear plate. The base is installed with the machining center, and then the pipe to be processed is inserted into the base, and then the motor is started. The output shaft of the motor will drive the rotating shaft to rotate and cause the pinion gear to rotate, so that the pinion gear drives the gear plate to rotate, and a transmission groove is opened on the surface of the gear plate, and the inner wall of the positioning frame is fixedly connected with a fixing plate.

[0007] Preferably, the control part also includes a movable groove, which is opened on the surface of the fixed plate, and a movable block is penetrated and slidably connected to the inner side of the fixed plate, and a linkage rod is fixedly connected to the surface of the movable block, and the linkage rod penetrates the movable groove and the transmission groove at the same time.

[0008] Preferably, a connecting column passes through and is slidably connected to the inner side of the moving block. When the gear plate rotates, the transmission groove on the surface will contact the linkage rod in the transmission groove, so that when the linkage rod is contacted by the transmission groove, the linkage rod slides along the moving groove, thereby driving the moving block to slide, so that the moving block drives the connecting column to move together, and a friction wheel is provided at one end of the connecting column close to the positioning frame.

[0009] Preferably, a sliding groove is provided on the side of the moving block, and a latch tooth is fixedly connected to the inner side of the fixing plate.

[0010] Preferably, the bottom end of the connecting column passes through and is slidably connected with a support rod, the bottom end of the support rod is fixedly connected with a top block, a spring is fixedly connected between the top block and the connecting column, and a slider is fixedly connected to the surface of the connecting column. When the friction wheel at the top end of the connecting column contacts the pipe and the moving block continues to move, the slider on the side of the connecting column will slide in the slide groove, so that the connecting column is relatively inserted into the moving block, and the slider passes through the slide groove and is slidably connected.

[0011] Preferably, a top end of the support rod is fixedly connected with a hinge block, and a hinge rod penetrates and is hingedly connected to the surface of the hinge block.

[0012] Preferably, the end of the hinge rod away from the hinge block passes through and is hinged with a push rod, the push rod passes through the slider and is slidably connected, the surface of the push rod is fixedly connected to a limit strip, the top block abuts against the inner wall of the moving block, and further the top block pushes the hinge block relatively, so that the hinge block pushes the hinge rod, and the hinge rod rotates to a certain extent and pushes the push rod, so that the push rod pushes the limit strip to get stuck between the teeth, thereby preventing the connecting column from moving further.

[0013] Compared with the prior art, the utility model provides a rotary center frame for a CNC lathe, which has the following beneficial effects:

[0014] 1. The rotary center frame of the CNC lathe, when the friction wheel at the top of the connecting column contacts the pipe and the moving block continues to move, the slider on the side of the connecting column will slide in the slide groove, so that the connecting column is relatively inserted into the moving block, and then the top block contacts the inner wall of the moving block, and further the top block pushes the hinge block relatively, so that the hinge block pushes the hinge rod, and the hinge rod rotates to a certain extent and pushes the push rod, so that the push rod pushes the limit strip to get stuck between the teeth, so that the connecting column cannot continue to move, to avoid excessive clamping force of the instrument causing deformation and depression of the thinner pipe wall.

[0015] 2. The rotary center frame of the CNC lathe can move the connecting columns in the three groups of moving blocks to the center of the positioning frame at the same time through three groups of moving blocks arranged in a circular array, ensuring that the axis of the pipe will not deviate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the internal structure of the positioning frame of the utility model;

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the fixing plate of the utility model;

[0019] Figure 4 This is a schematic diagram of the enlarged cross-sectional structure of the fixing plate of the utility model;

[0020] Figure 5 This is a schematic diagram of the expanded structure of the moving block and the connecting column of the utility model;

[0021] Figure 6 This is a schematic diagram of the cross-sectional structure of the connecting column of the utility model;

[0022] Figure 7 It is a partial enlarged structural schematic diagram of the hinge block of the utility model.

[0023] In the figure: 1. base; 2. control unit; 21. connecting box; 22. rotating shaft; 23. pinion; 24. gear plate; 25. transmission groove; 26. fixing plate; 27. moving groove; 28. moving block; 29. ​​linkage rod; 210. connecting column; 211. friction wheel; 212. slide groove; 213. latching tooth; 214. supporting rod; 215. top block; 216. spring; 217. sliding block; 218. hinge block; 219. hinge rod; 220. push rod; 221. limit strip; 3. positioning frame; 4. bracket; 5. motor. DETAILED DESCRIPTION

[0024] like Figure 1-Figure 7 As shown, the utility model provides a technical solution: a rotary center frame of a CNC lathe, comprising a base 1 and a positioning frame 3, the surface of the positioning frame 3 is fixedly connected with a bracket 4, the inner side of the bracket 4 is fixedly connected with a motor 5, the interior of the positioning frame 3 is provided with a control unit 2 for preventing excessive clamping, and the control unit 2 comprises: a connecting box 21, a rotating shaft 22, a pinion 23, a gear plate 24, a transmission groove 25, a fixed plate 26, a moving groove 27, a moving block 28, a linkage rod 29, a connecting column 210, a friction wheel 211, a slide groove 212, a latch tooth 213, a support rod 214, a top block 215, a spring 216, a slider 217, a hinge block 218, a hinge rod 219, a push rod 220, and a limit strip 221.

[0025] The bottom surface of the connecting box 21 is fixedly connected to the top surface of the positioning frame 3, and the surface of the connecting box 21 is penetrated by and rotatably connected with a rotating shaft 22. The end of the rotating shaft 22 close to the motor 5 is fixedly connected to the output shaft of the motor 5, and the end of the rotating shaft 22 away from the motor 5 is penetrated by and fixedly connected with a pinion 23. The inner wall of the positioning frame 3 is rotatably connected with a gear plate 24, and the pinion 23 is meshed with the gear plate 24. The base 1 is installed with the machining center, and then the pipe to be processed is inserted into the base 1, and then the motor 5 is started. The output shaft of the motor 5 will drive the rotating shaft 22 to rotate and cause the pinion 23 to rotate, so that the pinion 23 drives the gear plate 24 to rotate. A transmission groove 25 is opened on the surface of the gear plate 24, and a fixing plate 26 is fixedly connected to the inner wall of the positioning frame 3.

[0026] The control unit 2 further comprises a moving groove 27, which is provided on the surface of the fixed plate 26. A moving block 28 is penetrated and slidably connected to the inner side of the fixed plate 26. A linkage rod 29 is fixedly connected to the surface of the moving block 28. The linkage rod 29 penetrates the moving groove 27 and also penetrates the transmission groove 25. A connecting column 210 is penetrated and slidably connected to the inner side of the moving block 28. When the gear plate 24 rotates, the transmission groove 25 on the surface will contact the linkage rod 29 in the transmission groove 25. When the linkage rod 29 is contacted by the transmission groove 25, the linkage rod 29 slides along the moving groove 27, thereby driving the moving block 28 to slide, so that the moving block 28 drives the connecting column 210 to move together. A friction wheel 211 is provided at one end of the connecting column 210 close to the positioning frame 3. A sliding groove 212 is provided on the side of the moving block 28. A latching tooth 213 is fixedly connected to the inner side of the fixed plate 26. The bottom end of the connecting column 210 passes through and is slidably connected with a support rod 214, the bottom end of the support rod 214 is fixedly connected with a top block 215, a spring 216 is fixedly connected between the top block 215 and the connecting column 210, and a slider 217 is fixedly connected to the surface of the connecting column 210. When the friction wheel 211 at the top of the connecting column 210 contacts the pipe and the moving block 28 continues to move, the slider 217 on the side of the connecting column 210 will slide in the slide groove 212, so that the connecting column 210 is relatively inserted into the moving block 28.

[0027] The slider 217 penetrates the slide slot 212 and is slidably connected. The top of the support rod 214 is fixedly connected with a hinge block 218, and the surface of the hinge block 218 penetrates and is hinged with a hinge rod 219. The end of the hinge rod 219 away from the hinge block 218 penetrates and is hinged with a push rod 220, and the push rod 220 penetrates the slider 217 and is slidably connected. The surface of the push rod 220 is fixedly connected with a limit strip 221, and the top block 215 contacts the inner wall of the moving block 28, further causing the top block 215 to push the hinge block 218 relatively, so that the hinge block 218 pushes the hinge rod 219, and the hinge rod 219 rotates to a certain extent and pushes the push rod 220, so that the push rod 220 pushes the limit strip 221 to be stuck between the latch teeth 213, so that the connecting column 210 cannot move further.

[0028] Based on the above embodiment, when in use, the base 1 is installed with the machining center, and then the pipe to be processed is inserted into the base 1, and then the motor 5 is started. The output shaft of the motor 5 will drive the rotating shaft 22 to rotate to rotate the pinion 23, so that the pinion 23 drives the gear plate 24 to rotate. When the gear plate 24 rotates, the transmission groove 25 on the surface will contact the linkage rod 29 in the transmission groove 25, so that when the linkage rod 29 is contacted by the transmission groove 25, the linkage rod 29 slides along the moving groove 27, and then drives the moving block 28 to slide, so that the moving block 28 drives the connecting column 210 to move together, and when the friction wheel 211 at the top of the connecting column 210 When the movable block 28 continues to move while contacting the pipe, the slider 217 on the side of the connecting column 210 will slide in the slide groove 212, so that the connecting column 210 is relatively inserted into the movable block 28, and then the top block 215 contacts the inner wall of the movable block 28, and further the top block 215 pushes the hinge block 218 relatively, so that the hinge block 218 pushes the hinge rod 219, and the hinge rod 219 will rotate to a certain extent and push the push rod 220, so that the push rod 220 pushes the limit strip 221 to get stuck between the latch teeth 213, so that the connecting column 210 cannot continue to move, to avoid the excessive clamping force of the instrument causing the thinner pipe wall to deform and dent.

[0029] At the same time, through the three groups of moving blocks 28 arranged in a circular array, the connecting columns 210 in the three groups of moving blocks 28 can be moved toward the center of the positioning frame 3 at the same time, ensuring that the axis of the pipe will not deviate.

[0030] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A rotary center frame of a CNC lathe, comprising a base (1) and a positioning frame (3), characterized in that: A bracket (4) is fixedly connected to the surface of the positioning frame (3), a motor (5) is fixedly connected to the inner side of the bracket (4), a control unit (2) for preventing excessive clamping is arranged inside the positioning frame (3), and the control unit (2) comprises: a connection box (21), the bottom surface of the connection box (21) is fixedly connected to the top surface of the positioning frame (3), a rotating shaft (22) is passed through and rotatably connected to the surface of the connection box (21), an end of the rotating shaft (22) close to the motor (5) is fixedly connected to the output shaft of the motor (5), and an end of the rotating shaft (22) away from the motor (5) is passed through and fixedly connected to a pinion (23), an inner wall of the positioning frame (3) is rotatably connected to a gear plate (24), the pinion (23) is meshed with the gear plate (24), a transmission groove (25) is provided on the surface of the gear plate (24), and a fixing plate (26) is fixedly connected to the inner wall of the positioning frame (3).

2. The rotary center frame of a CNC lathe according to claim 1, characterized in that: The control unit (2) further comprises a moving groove (27), wherein the moving groove (27) is formed on the surface of the fixed plate (26), a moving block (28) penetrates through the inner side of the fixed plate (26) and is slidably connected thereto, a linkage rod (29) is fixedly connected to the surface of the moving block (28), and the linkage rod (29) penetrates through the moving groove (27) and also penetrates through the transmission groove (25).

3. The rotary center frame of a CNC lathe according to claim 2, characterized in that: A connecting column (210) penetrates the inner side of the moving block (28) and is slidably connected thereto. A friction wheel (211) is provided at one end of the connecting column (210) close to the positioning frame (3).

4. The rotary center frame of a CNC lathe according to claim 2, characterized in that: A sliding groove (212) is provided on the side of the moving block (28), and a latching tooth (213) is fixedly connected to the inner side of the fixing plate (26).

5. The rotary center frame of a CNC lathe according to claim 3, characterized in that: The bottom end of the connecting column (210) passes through and is slidably connected to a support rod (214), the bottom end of the support rod (214) is fixedly connected to a top block (215), a spring (216) is fixedly connected between the top block (215) and the connecting column (210), and a sliding block (217) is fixedly connected to the surface of the connecting column (210), and the sliding block (217) passes through the sliding groove (212) and is slidably connected.

6. The rotary center frame of a CNC lathe according to claim 5, characterized in that: The top end of the support rod (214) is fixedly connected to a hinge block (218), and a hinge rod (219) penetrates and is hingedly connected to the surface of the hinge block (218).

7. The rotary center frame of a CNC lathe according to claim 6, characterized in that: One end of the hinge rod (219) away from the hinge block (218) passes through and is hingedly connected to a push rod (220), the push rod (220) passes through the slider (217) and is slidably connected, and the surface of the push rod (220) is fixedly connected to a limit strip (221).

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