High-precision combined spindle structure of numerically controlled lathe

Abstract

The utility model relates to the technical field of main shaft structures, and discloses a high-precision combined main shaft structure of a numerically controlled lathe, which comprises a shaft seat and a main shaft body, and is characterized in that a pull rod is pulled downwards to drive a rotating plate to rotate through a connecting ring, so that a linkage rod in a rotating groove slides along the rotating groove; a linkage rod drives a movable block to slide in a limiting groove, a straight spring is compressed, a push rod pushes positioning blocks to move towards the axis of a protection shell, balls in the positioning blocks are attached to the surface of a main shaft body, and then fixing is completed; the positioning blocks can synchronously move towards the axis of the protective shell, the axes of the two ends of the spindle body can be kept consistent through the two symmetrically-arranged positioning parts, and it is avoided that abrasion is increased when the spindle rotates due to the fact that the axis of the spindle body deviates during installation.

Description

Technical Field

[0001] The utility model relates to the technical field of spindle structures, in particular to a high-precision combined spindle structure for a numerically controlled lathe. Background Art

[0002] The high-precision combined spindle structure of the CNC lathe is designed to improve the machining accuracy and performance of the machine tool. This high-precision combined spindle structure can improve the machining accuracy and surface quality of the CNC lathe, and is suitable for processing parts with high machining accuracy requirements.

[0003] According to a disclosed high-precision combined spindle structure for a CNC lathe (publication number: CN218656835U), when the spindle is installed or disassembled for maintenance in the above application, the shaft body needs to be manually placed in the spindle box. If the shaft body is too long, the axis center of the shaft body at both ends may be offset, thereby increasing the friction between the spindle and the spindle box when rotating and increasing wear. Summary of the invention

[0004] The purpose of the utility model is to provide a high-precision combined spindle structure for a CNC lathe to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-precision combined spindle structure for a CNC lathe, comprising a shaft seat and a spindle body, the interior of the shaft seat is provided with a positioning portion for assisting the installation of the spindle body, and the interior of the shaft seat is also provided with a linkage portion for improving the stability of the positioning portion on the spindle body after installation.

[0006] Preferably, the positioning portion includes:

[0007] A protective shell, the protective shell passes through the shaft seat and is fixedly connected, a groove is provided on the surface of the protective shell, a limiting plate is fixedly connected to the inner wall of the protective shell, and a limiting groove is provided on the surface of the limiting plate;

[0008] A rotating plate, which is located on the inner side of the protective shell and is rotatably connected to the inner wall of the protective shell. A rotating groove is provided on the surface of the rotating plate, a linkage rod passes through the inner side of the rotating groove, and a push rod is fixedly connected to one end of the linkage rod away from the inner side of the rotating groove. A moving block is fixedly connected to the surface of the push rod on one side away from the linkage rod, and the moving block passes through the limiting groove and is slidably connected.

[0009] Preferably, a positioning block is fixedly connected to one side of the push rod close to the axis of the limit plate, and the linkage rod in the rotating groove slides along the rotating groove, thereby causing the linkage rod to drive the moving block to slide in the limit groove and compress the straight spring, so that the push rod pushes the positioning block to move toward the axis of the protective shell, and a ball is arranged inside the positioning block.

[0010] Preferably, a straight spring is fixedly connected to the inner side of the limit groove, and one end of the straight spring away from the inner side of the limit groove is fixedly connected to the surface of the moving block. When the pull rod is pushed upward, the pull rod will drive the rotating plate to rotate through the connecting ring, so that the rotating groove on the surface of the rotating plate drives the linkage rod to reset.

[0011] Preferably, the number of the positioning blocks is four groups, and an arc rod passes through each two groups of the positioning blocks. Through the four groups of positioning blocks arranged in a circular array and the arc rods between the positioning blocks, the positioning blocks can be moved synchronously toward the axis center of the protective shell, and an arc spring is fixedly connected between each two groups of the positioning blocks.

[0012] Preferably, the linkage part includes a connecting ring, and the side of the connecting ring close to the rotating plate is fixedly connected to the surface of the rotating plate, and the surface of the connecting ring is fixedly connected with limiting teeth. The surface of the connecting ring is fixedly connected with a pull rod, and the bolt is tightened so that the bolt pushes the lifting block to move downward. The pull rod passes through the pull groove and is slidably connected. The surface of the protective shell is fixedly connected with a U-shaped block, and the top surface of the U-shaped block passes through and is threadedly connected with a bolt, and the bottom end of the bolt passes through and is rotatably connected with the lifting block, and the lifting block passes through the protective shell and is slidably connected.

[0013] Preferably, the bottom surface of the lifting block is hinged with a hinged plate. When disassembling and repairing, the bolts are first loosened to make the U-shaped block rise upward, and then the lifting block is driven to rise together, so that the hinged plate will not limit the limit teeth. The bottom surface of the lifting block is fixedly connected to the limit block, and a torsion spring is fixedly connected between the right side of the hinged plate and the lifting block.

[0014] Compared with the prior art, the utility model provides a high-precision combined spindle structure for a CNC lathe, which has the following beneficial effects:

[0015] 1. The high-precision combined spindle structure of the CNC lathe pulls the pull rod downward, so that the pull rod drives the rotating plate to rotate through the connecting ring, and then the linkage rod in the rotating groove slides along the rotating groove, and then the linkage rod drives the moving block to slide in the limit groove, and the straight spring will be compressed, so that the push rod pushes the positioning block to move toward the axis of the protective shell, and the ball in the positioning block will fit with the surface of the spindle body to complete the fixation. Through four groups of positioning blocks arranged in a circular array and the arc rods between the positioning blocks, the positioning block can be synchronously moved toward the axis of the protective shell. The two groups of symmetrically arranged positioning parts can keep the axis at both ends of the spindle body consistent, avoiding the axis deviation of the spindle body during installation, which leads to increased wear of the spindle when it rotates.

[0016] 2. The high-precision combined spindle structure of the CNC lathe should be disassembled and repaired by first loosening the bolts to make the U-shaped block rise upward, and then driving the lifting block to rise together, so that the hinged plate will not limit the limit teeth, and then pushing the pull rod upward. The pull rod will drive the rotating plate to rotate through the connecting ring, so that the rotating groove on the surface of the rotating plate drives the linkage rod to reset, and the straight spring will push the moving block to reset, and the arc spring will open the positioning block at the same time. The lifting block can be adjusted up and down by the bolts to limit the rotating plate in the positioning part, so that the positioning block and the ball in the positioning block can always fit the surface of the spindle body to ensure the stability of the spindle body during rotation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the front view structure of the utility model;

[0018] Figure 2 This is a schematic diagram of the cross-sectional structure of the axle seat of the utility model;

[0019] Figure 3 This is a schematic diagram of the cross-sectional structure of the protective shell of the utility model;

[0020] Figure 4 This is a schematic diagram of the cross-sectional expansion structure of the protective shell of the utility model;

[0021] Figure 5 It is a partial enlarged structural schematic diagram of the utility model;

[0022] Figure 6 It is a schematic diagram of the enlarged structure of the U-shaped block of the utility model.

[0023] In the figure: 1. shaft seat; 2. positioning part; 21. protective shell; 22. pull groove; 23. limit plate; 24. limit groove; 25. turn plate; 26. rotation groove; 27. linkage rod; 28. push rod; 29. ​​positioning block; 210. ball; 211. arc rod; 212. arc spring; 213. moving block; 214. straight spring; 3. linkage part; 31. connecting ring; 32. limit tooth; 33. pull rod; 34. U-shaped block; 35. bolt; 36. lifting block; 37. hinge plate; 38. limit block; 39. torsion spring; 4. spindle body. DETAILED DESCRIPTION

[0024] like Figure 1-Figure 6 As shown, the utility model provides a technical solution: a high-precision combined spindle structure for a CNC lathe, comprising a shaft seat 1 and a spindle body 4, the shaft seat 1 is provided with a positioning portion 2 for assisting the installation of the spindle body 4, and the shaft seat 1 is also provided with a linkage portion 3 for improving the stability of the positioning portion 2 on the spindle body 4 after installation.

[0025] The positioning part 2 includes a protective shell 21, a pull groove 22, a limit plate 23, a limit groove 24, a rotating plate 25, a rotating groove 26, a linkage rod 27, a push rod 28, a positioning block 29, a ball 210, an arc rod 211, an arc spring 212, a moving block 213, and a straight spring 214.

[0026] The protective shell 21 passes through the shaft seat 1 and is fixedly connected. A groove 22 is provided on the surface of the protective shell 21. The inner wall of the protective shell 21 is fixedly connected to a limiting plate 23. A limiting groove 24 and a rotating plate 25 are provided on the surface of the limiting plate 23. The rotating plate 25 is located on the inner side of the protective shell 21 and is rotatably connected to the inner wall of the protective shell 21. A rotating groove 26 is provided on the surface of the rotating plate 25. A linkage rod 27 passes through the inner side of the rotating groove 26. A push rod 28 is fixedly connected to the end of the linkage rod 27 away from the inner side of the rotating groove 26. A moving block 213 is fixedly connected to the surface of the push rod 28 away from the linkage rod 27. The moving block 213 passes through the limiting groove 24 and is slidably connected. The push rod 28 is fixedly connected to a positioning block 29 on one side close to the axis of the limiting plate 23. The linkage rod 27 in the rotating groove 26 slides along the rotating groove 26, so that the linkage rod 27 drives the moving block 213 to slide in the limiting groove 24, and compresses the straight spring 214, so that the push rod 28 pushes the positioning block 29 to move toward the axis of the protective shell 21. A ball 210 is arranged inside the positioning block 29. A straight spring 214 is fixedly connected to the inner side of the limiting groove 24. One end of the straight spring 214 away from the inner side of the limiting groove 24 is fixedly connected to the surface of the moving block 213, pushing the pull rod 33 upward. The pull rod 33 drives the rotating plate 25 to rotate through the connecting ring 31, so that the rotating groove 26 on the surface of the rotating plate 25 drives the linkage rod 27 to reset, and the straight spring 214 pushes the moving block 213 to reset, and the arc spring 212 opens the positioning block 29. There are four groups of positioning blocks 29, and an arc rod 211 passes through each two groups of positioning blocks 29. Through the four groups of positioning blocks 29 arranged in a circular array and the arc rod 211 between the positioning blocks 29, the positioning blocks 29 can be synchronously moved toward the axis of the protective shell 21, and an arc spring 212 is fixedly connected between each two groups of positioning blocks 29.

[0027] The linkage part 3 includes a connecting ring 31, and one side of the connecting ring 31 close to the rotating plate 25 is fixedly connected to the surface of the rotating plate 25, and the surface of the connecting ring 31 is fixedly connected to the limiting teeth 32, and the surface of the connecting ring 31 is fixedly connected to the pull rod 33. When the main shaft body 4 is installed, the main shaft body 4 is passed through the protective shell 21, and then the bolts 35 are tightened so that the bolts 35 push the lifting block 36 to move downward, so that the hinge plate 37 can limit the limiting teeth 32, and then the pull rod 33 is pulled downward, so that the pull rod 33 drives the rotating plate 25 to rotate through the connecting ring 31, and the pull rod 33 penetrates the groove 22 and is slidably connected. The surface of the protective shell 21 is fixedly connected with a U-shaped block 34, and the top surface of the U-shaped block 34 is penetrated and threadedly connected with the bolt 35, and the bottom end of the bolt 35 is penetrated and rotatably connected with the lifting block 36, and the lifting block 36 penetrates the protective shell 21 and is slidably connected. The bottom surface of the lifting block 36 is hinged with a hinged plate 37. When disassembling and repairing, first loosen the bolt 35 so that the bolt 35 is located in the U-shaped block 34 and rises upward, and then the lifting block 36 is driven to rise together, so that the hinged plate 37 will not limit the limit tooth 32. The bottom surface of the lifting block 36 is fixedly connected to the limit block 38, and a torsion spring 39 is fixedly connected between the right side of the hinged plate 37 and the lifting block 36.

[0028] Based on the above embodiment, when installing the main shaft body 4, the main shaft body 4 is passed through the protective shell 21, and then the bolt 35 is tightened, so that the bolt 35 pushes the lifting block 36 to move downward, so that the hinge plate 37 can limit the limiting tooth 32, and then the pull rod 33 is pulled downward, so that the pull rod 33 drives the rotating plate 25 to rotate through the connecting ring 31, and then the linkage rod 27 in the rotating groove 26 slides along the rotating groove 26, and then the linkage rod 27 drives the moving block 213 to slide in the limiting groove 24, and the straight spring 214 is pressed The push rod 28 pushes the positioning block 29 to move toward the axis of the protective shell 21, and the ball 210 in the positioning block 29 fits with the surface of the spindle body 4 to complete the fixation. The positioning blocks 29 are arranged in four groups of circular arrays and the arc rods 211 between the positioning blocks 29, so that the positioning blocks 29 can be synchronously moved toward the axis of the protective shell 21. The two groups of symmetrically arranged positioning parts 2 can keep the axis at both ends of the spindle body 4 consistent, avoiding the axis deviation of the spindle body 4 during installation, which leads to increased wear of the spindle when it rotates.

[0029] When disassembling and repairing, first loosen the bolt 35 so that the bolt 35 located in the U-shaped block 34 rises upward, and then drives the lifting block 36 to rise together, so that the hinge plate 37 will not limit the limit tooth 32, and then push the pull rod 33 upward. The pull rod 33 will drive the rotating plate 25 to rotate through the connecting ring 31, so that the rotating groove 26 on the surface of the rotating plate 25 drives the linkage rod 27 to reset, and the straight spring 214 will push the moving block 213 to reset, and the arc spring 212 will open the positioning block 29. The up and down adjustment of the lifting block 36 by the bolt 35 can limit the rotating plate 25 in the positioning part 2, so that the positioning block 29 and the ball 210 in the positioning block 29 can always fit the surface of the spindle body 4 to ensure the stability of the spindle body 4 during rotation.

[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 high-precision combined spindle structure for a CNC lathe, comprising a spindle seat (1) and a spindle body (4), characterized in that: The shaft seat (1) is provided with a positioning portion (2) for assisting the installation of the main shaft body (4), and the shaft seat (1) is also provided with a linkage portion (3) for improving the stability of the positioning portion (2) after installation on the main shaft body (4).

2. The high-precision combined spindle structure of a CNC lathe according to claim 1, characterized in that: The positioning portion (2) comprises: A protective shell (21), the protective shell (21) passing through the shaft seat (1) and being fixedly connected, a groove (22) being provided on the surface of the protective shell (21), a limiting plate (23) being fixedly connected to the inner wall of the protective shell (21), and a limiting groove (24) being provided on the surface of the limiting plate (23); A rotating plate (25), the rotating plate (25) being located on the inner side of the protective shell (21) and being rotatably connected to the inner wall of the protective shell (21), a rotating groove (26) being provided on the surface of the rotating plate (25), a linkage rod (27) penetrating the inner side of the rotating groove (26), a push rod (28) being fixedly connected to one end of the linkage rod (27) away from the inner side of the rotating groove (26), a moving block (213) being fixedly connected to the surface of one side of the push rod (28) away from the linkage rod (27), and the moving block (213) penetrating the limiting groove (24) and being slidably connected.

3. The high-precision combined spindle structure of a CNC lathe according to claim 2, characterized in that: A positioning block (29) is fixedly connected to one side of the push rod (28) close to the axis of the limiting plate (23), and a ball (210) is disposed inside the positioning block (29).

4. The high-precision combined spindle structure of a CNC lathe according to claim 2, characterized in that: A straight spring (214) is fixedly connected to the inner side of the limiting groove (24), and one end of the straight spring (214) away from the inner side of the limiting groove (24) is fixedly connected to the surface of the moving block (213).

5. The high-precision combined spindle structure of a CNC lathe according to claim 3, characterized in that: The number of the positioning blocks (29) is four groups, and an arc-shaped rod (211) passes through between every two groups of the positioning blocks (29), and an arc-shaped spring (212) is fixedly connected between every two groups of the positioning blocks (29).

6. The high-precision combined spindle structure of a CNC lathe according to claim 2, characterized in that: The linkage part (3) comprises a connecting ring (31), a side of the connecting ring (31) close to the rotating plate (25) is fixedly connected to the surface of the rotating plate (25), the surface of the connecting ring (31) is fixedly connected to the limiting teeth (32), the surface of the connecting ring (31) is fixedly connected to a pull rod (33), the pull rod (33) passes through the pull groove (22) and is slidably connected, the surface of the protective shell (21) is fixedly connected to a U-shaped block (34), the top surface of the U-shaped block (34) passes through and is threadedly connected to a bolt (35), the bottom end of the bolt (35) passes through and is rotatably connected to a lifting block (36), and the lifting block (36) passes through the protective shell (21) and is slidably connected.

7. The high-precision combined spindle structure of a CNC lathe according to claim 6, characterized in that: The bottom surface of the lifting block (36) is hinged with a hinge plate (37), the bottom surface of the lifting block (36) is fixedly connected to a limit block (38), and a torsion spring (39) is fixedly connected between the right side of the hinge plate (37) and the lifting block (36).

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