Vertical-horizontal switching mechanism for spindle of numerical control machine tool

Abstract

The invention discloses a vertical-horizontal switching mechanism for a spindle of a numerical control machine tool, which relates to the field of numerical control machine tools and comprises a shaft body, an operation end part, a first adjusting assembly and a second adjusting assembly, the shaft body comprises a fixed part and a rotating part, the rotating part is fixedly connected with a connecting frame, the connecting frame is rotatably connected with a rotating shaft, the rotating shaft is fixedly connected with the operation end part, the first adjusting assembly is installed in the fixed part and extends into the rotating part, and the first adjusting assembly is used for driving the rotating part to rotate; by arranging the first adjusting assembly and the second adjusting assembly, in the operation process, the vertical and horizontal state of the operation end can be changed through mutual cooperation of the first adjusting assembly and the second adjusting assembly, self-locking can be achieved in the adjusting process, and the stability of the device is improved; therefore, the problem that in the prior art, due to the fact that a spindle cannot achieve vertical and horizontal conversion, limitation exists when the device treats workpieces is solved.

Description

Technical Field

[0001] The invention relates to the field of numerically controlled machine tools, in particular to a vertical-horizontal conversion mechanism of a main shaft of a numerically controlled machine tool. Background Art

[0002] ‌The spindle of a CNC machine tool refers to the axis on the machine tool that drives the workpiece or tool to rotate. It is usually composed of a spindle, bearings, and transmission parts (such as gears or pulleys). It is mainly used to support transmission parts such as gears and pulleys and transmit motion and torque. The spindle of a CNC machine tool is not only used to drive the tool for cutting, but also to clamp the workpiece. ‌ At present, in the process of mechanical parts production, CNC machine tools are used to operate mechanical parts to improve work efficiency and product precision. During the use of CNC machine tools, the tool is clamped by the spindle, and the rotation of the tool is controlled by the spindle to process the mechanical parts. However, a large part of the spindles of CNC machine tools have only one set of forms, either vertical or horizontal, so they cannot be used for the processing of various mechanical parts, which makes the equipment limited in the process of processing parts. To this end, we propose a vertical-horizontal conversion mechanism for the spindle of CNC machine tools. Summary of the invention

[0003] The object of the present invention is to provide a vertical-horizontal conversion mechanism for a CNC machine tool spindle to solve the problems raised in the above-mentioned background technology.

[0004] To achieve the above-mentioned object, the present invention provides the following technical solutions: a vertical-horizontal conversion mechanism of a CNC machine tool spindle, comprising a shaft body and an operating end; The shaft body comprises a fixed part and a rotating part, the rotating part is fixedly connected to a connecting frame, the connecting frame is rotatably connected to a rotating shaft, and the rotating shaft is fixedly connected to the operating end; Also includes: A first adjusting component, the first adjusting component is installed in the fixing portion and extends into the rotating portion, and the first adjusting component is used to drive the rotating portion to rotate; The second adjusting component is installed on the rotating part and cooperates with the first adjusting component. The second adjusting component is used to drive the operating end to rotate. Through the cooperation of the first adjusting component and the second adjusting component, the working position and angle of the operating end can be adjusted.

[0005] Preferably, the first adjusting component includes a limit plate slidably installed inside the rotating part, the limit plate is arranged in a close fit with the end of the fixed part, and a sliding column slidably connected to the fixed part is fixedly connected to the limit plate, the end of the sliding column is connected to a transmission member, and a tension spring is sleeved on the outer side of the sliding column, and the two ends of the tension spring are respectively fixedly connected to the fixed part and the transmission member, and the transmission member is connected to a first motor installed inside the fixed part to facilitate adjusting the angle of the operating end.

[0006] Preferably, the transmission member includes a connecting plate fixedly connected to the sliding column, the connecting plate is fixedly connected to the end of the tension spring, and a connecting ring is fixedly connected to the connecting plate, a plurality of groups of inclined grooves are opened on the connecting ring, an inclined block is slidably connected inside the inclined groove, and the ends of multiple groups of the inclined blocks are fixedly connected to fixed plates, and a blocking member for blocking the inclined block from continuing to move is connected between the inclined block and the connecting ring, so as to drive the rotating part to rotate and realize the adjustment of the operating end.

[0007] Preferably, the blocking member includes a protrusion fixedly connected to the inclined block, a blocking block is installed on the outer side of the protrusion, the blocking block is installed at a position close to the end of the connecting ring and is located at the end of the inclined groove, and a support column fixedly connected to the connecting ring is fixedly connected to the blocking block.

[0008] Preferably, the second adjustment component includes a support frame fixedly connected to the connecting frame, a second motor is fixedly connected to the support frame, a connecting shaft is fixedly connected to the output end of the second motor, a limiting member connected to the limiting plate is connected to the connecting shaft, and a linkage member connected to the rotating shaft is also connected to the connecting shaft, so as to facilitate vertical and horizontal adjustment of the operating end.

[0009] Preferably, the linkage member includes an active synchronous wheel fixedly connected to the connecting shaft, the outer side surface of the active synchronous wheel is meshed with a transmission belt, and the transmission belt is transmission-connected to a driven synchronous wheel fixedly connected to the rotating shaft, so as to drive the rotating shaft to rotate and cause the operating end to rotate.

[0010] Preferably, the limiting member includes a limiting block sleeved on the outer side surface of the connecting shaft, the limiting blocks are provided in two groups and are symmetrically distributed, the outer side surface of the connecting shaft is provided with multiple groups of extrusion sheets arranged in a circle, the extrusion sheets are located in the limiting block, and the extrusion sheets are fixedly connected to a moving column slidably connected to the connecting shaft, the end of the moving column is slidably connected to a conical block, a connecting rod is fixedly connected between the two groups of the conical blocks, and the end of the connecting rod is connected to a pushing member, which is convenient for limiting the connecting shaft and improves stability.

[0011] Preferably, the pushing member includes a telescopic rod fixed to one end of the connecting shaft, the telescopic end of the telescopic rod is provided with a push rod, and the end of the push rod is fixedly connected to a connecting block fixedly connected to the connecting rod, so as to facilitate pushing the two groups of conical blocks to move simultaneously.

[0012] Preferably, both sides of the driving synchronous wheel and the driven synchronous wheel are installed with limit plates, and the transmission belt is located between the two groups of the limit plates to prevent the transmission belt from slipping.

[0013] Preferably, a heat dissipation hole is provided on the fixing portion at a position of the first motor to facilitate heat dissipation of the first motor and increase its service life.

[0014] Compared with the prior art, the present invention has the following beneficial effects: The present invention provides a vertical-horizontal conversion mechanism for a CNC machine tool spindle. The mechanism comprises a first adjusting component and a second adjusting component. Therefore, during operation, the vertical or horizontal state of the operating end portion can be changed through the cooperation of the first adjusting component and the second adjusting component. In addition, the mechanism can achieve self-locking during the adjustment process, thereby improving the stability of the device. Therefore, the problem in the prior art that the spindle cannot achieve vertical-horizontal conversion, resulting in limitations in the device when processing workpieces, is solved. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 It is a schematic diagram of the cross-sectional structure of the present invention; Figure 3 This is a schematic diagram of the structure of the first adjustment component of the present invention; Figure 4 For the present invention Figure 3 Schematic diagram of the structure of the middle A area; Figure 5 This is a schematic diagram of the structure of the second adjustment component of the present invention; Figure 6 It is a schematic diagram of the structure of the position-limiting member of the present invention; Figure 7 For the present invention Figure 6 Schematic diagram of the structure of the middle B area; Figure 8 This is a schematic structural diagram of the position limiting member of the present invention from another viewing angle; Fig. 9 For the present invention Figure 8 Schematic diagram of the structure of the middle C area;.

[0016] In the figure: 1, shaft body; 2, operating end; 3, connecting frame; 4, fixed part; 5, rotating part; 6, rotating shaft; 7, limiting plate; 8, sliding column; 9, tension spring; 10, transmission member; 11, first motor; 12, connecting plate; 13, connecting ring; 14, inclined groove; 15, inclined block; 16, fixing plate; 17, blocking member; 18, protrusion; 19, supporting column; 20, blocking block; 21, supporting frame; 22, second motor; 23, connecting shaft; 24, limiting member; 25, linkage member; 26, active synchronous wheel; 27, transmission belt; 28, driven synchronous wheel; 29, limiting block; 30, extrusion plate; 31, moving column; 32, conical block; 33, connecting rod; 34, pushing member; 35, telescopic rod; 36, push rod; 37, connecting block; 38, limiting plate. DETAILED DESCRIPTION

[0017] 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.

[0018] See also Figure 1-Figure 9 The present invention provides a technical solution: a vertical-horizontal conversion mechanism of a CNC machine tool spindle, comprising a shaft body 1 and an operating end 2; the shaft body 1 comprises a fixed part 4 and a rotating part 5, the rotating part 5 is fixedly connected with a connecting frame 3, the connecting frame 3 is rotatably connected with a rotating shaft 6, and the rotating shaft 6 is fixedly connected to the operating end 2; it also includes: a first adjusting component, the first adjusting component is installed in the fixed part 4 and extends into the rotating part 5, the first adjusting component is used to drive the rotating part 5 to rotate; a second adjusting component, the second adjusting component is installed on the rotating part 5 and cooperates with the first adjusting component, the second adjusting component is used to drive the operating end 2 to rotate, and the working position and angle of the operating end 2 can be adjusted through the cooperation of the first adjusting component and the second adjusting component.

[0019] In this embodiment, by providing a first adjustment component and a second adjustment component, during operation, the vertical or horizontal state of the operating end 2 can be changed through the cooperation of the first adjustment component and the second adjustment component, and self-locking can be achieved during the adjustment process, thereby improving the stability of the device.

[0020] See also Figure 2-Figure 4, the first adjustment component shown in the figure includes a limit plate 7 slidably installed inside the rotating part 5, the limit plate 7 is tightly fitted with the fixed part 4, and the fixed part 4 is limited by the extrusion of the limit plate 7 and the fixed part 4, the limit plate 7 is fitted with the end of the fixed part 4, and a sliding column 8 slidably connected to the fixed part 4 is fixedly connected to the limit plate 7, and a transmission member 10 is connected to the end of the sliding column 8. The function of the transmission member 10 is to make the limit plate 7 disengage from the end of the fixed part 4, and drive the rotating part 5 to rotate after the disengagement, and the outer side of the sliding column 8 is sleeved with a tension spring 9, and the two ends of the tension spring 9 are respectively fixedly connected to the fixed part 4 and the transmission member 10, and the tension spring is mainly used for resetting the limit plate, and the transmission member 10 is connected to a first motor 11 installed inside the fixed part 4, so as to adjust the angle of the operating end 2; the transmission member 10 includes a connecting plate 12 fixedly connected to the sliding column 8, and the connecting plate 12 is fixedly connected to the end of the tension spring 9, and the connecting plate 12 is fixedly connected to the end of the tension spring 9, and the connecting plate 12 is fixedly connected to the end of the tension spring 9, and the connecting plate 12 is fixedly connected to the end of the tension spring 9. The connecting plate 12 is fixedly connected to a connecting ring 13, and a plurality of groups of inclined grooves 14 are provided on the connecting ring 13. An inclined block 15 is slidably connected inside the inclined groove 14, and a plurality of groups of the inclined blocks 15 are fixedly connected to the ends of the fixed plates 16. The inclined blocks 15 and the inclined grooves 14 cooperate with each other to enable the connecting ring 13, the connecting plate 12, the sliding column 8 and the limiting plate 7 to move downward. A blocking member 17 for blocking the inclined block 15 from continuing to move is connected between the inclined block 15 and the connecting ring 13. The blocking member 17 is mainly used to The rotation of the block 15 is limited, and then the connecting ring 13 can be rotated through the limiting effect, which is convenient for driving the rotating part 5 to rotate and realize the adjustment of the operating end 2; the blocking member 17 includes a protrusion 18 fixedly connected to the inclined block 15, and a blocking block 20 is installed on the outer side of the protrusion 18. The blocking block 20 is installed at a position close to the end of the connecting ring 13 and is located at the end of the inclined groove 14. A support column 19 fixedly connected to the connecting ring 13 is fixedly connected to the blocking block 20.

[0021] In this embodiment, by controlling the first motor 11 to start, when the first motor 11 is started, the fixing plate 16 will be rotated, and the inclined block 15 will be rotated during the rotation of the fixing plate 16. The cooperation between the inclined block 15 and the inclined groove 14 will make the connecting ring 13 move downward, and the connecting plate 12 drives the sliding column 8 to move downward through the downward movement of the connecting ring 13, thereby driving the limiting plate 7 to move downward. When the limiting plate 7 moves downward away from the fixing part 4, the fixing part 4 loses the limiting effect of the limiting plate 7, and at the same time, the protrusion 18 will be attached to one side of the blocking block 20. At this time, the first motor 11 continues to rotate, which will cause the protrusion 18 to squeeze the blocking block 20 so that the blocking block 20 and the protrusion 18 rotate synchronously, thereby making the connecting ring 13 drive the sliding column 8 to rotate, and then drive the limiting plate 7 to rotate, and the rotation of the limiting plate 7 makes the rotating part 5 rotate, thereby adjusting the angle of the operating end 2.

[0022] See also Figure 5-Figure 9 The second adjustment assembly shown in the figure includes a support frame 21 fixedly connected to the connecting frame 3, which is convenient for supporting and fixing the second motor 22. The second motor 22 is fixedly connected to the support frame 21, and the output end of the second motor 22 is fixedly connected to a connecting shaft 23. The connecting shaft 23 is connected to a limiting member 24 connected to the limiting plate 7. The rotation of the connecting shaft 23 is limited by the action of the limiting member 24, thereby improving the stability of the operating end 2. The connecting shaft 23 is also connected to a linkage member 25 connected to the rotating shaft 6. The linkage member 25 is mainly used to transmit power. , so that the connecting shaft 23 drives the rotating shaft 6 to rotate after being driven by the second motor 22, so as to facilitate the vertical and horizontal adjustment of the operating end 2; the linkage member 25 includes an active synchronous wheel 26 fixedly connected to the connecting shaft 23, and the outer side surface of the active synchronous wheel 26 is meshed with a transmission belt 27, and the transmission belt 27 is transmission-connected with a driven synchronous wheel 28 fixedly connected to the rotating shaft 6, so as to facilitate driving the rotating shaft 6 to rotate so as to rotate the operating end 2, and the active synchronous wheel 26 and the driven synchronous wheel (28) 28 are both gear-shaped, meshed with the transmission belt 27 for transmission, thereby improving the transmission efficiency and avoiding slippage. The situation occurs; the limiting member 24 includes a limiting block 29 sleeved on the outer side of the connecting shaft 23, and a long slot is opened on the limiting block 29, and the long slot is sleeved on the outer side of the connecting shaft 23. The limiting block 29 is provided with two groups and is symmetrically distributed to further improve stability. The outer side of the connecting shaft 23 is provided with multiple groups of extrusion sheets 30 arranged in a circle, and the extrusion sheet 30 is located in the limiting block 29. The extrusion sheet 30 is located in the long slot of the limiting block 29, and the connecting shaft 23 is limited by the extrusion of the extrusion sheet 30 and the inner wall of the long slot, and the extrusion sheet 30 is fixedly connected There is a moving column 31 that is slidably connected to the connecting shaft 23, and the end of the moving column 31 is slidably connected to a conical block 32. A connecting rod 33 is fixedly connected between the two groups of conical blocks 32, and the end of the connecting rod 33 is connected to a pushing member 34, which is convenient for limiting the connecting shaft 23 and improving stability; the pushing member 34 includes a telescopic rod 35 fixed to one end of the connecting shaft 23, and the telescopic end of the telescopic rod 35 is provided with a push rod 36, and the end of the push rod 36 is fixedly connected to a connecting block 37 fixedly connected to the connecting rod 33, which is convenient for pushing the two groups of conical blocks 32 to move simultaneously.

[0023] In this embodiment, the push rod 36 is pulled to move by the action of the telescopic rod 35. In the process of pushing the rod 36, the two sets of tapered blocks 32 will be pulled to move by the connecting rod 33. The movement of the tapered block 32 causes the moving column 31 to drive the extrusion sheet 30 to move. At this time, the extrusion sheet 30 will be away from the limit block 29. At this time, the connecting shaft 23 will lose the limit of the limit block 29, and then the second motor 22 will be started. At this time, the second motor 22 will drive the connecting shaft 23 to rotate, and the rotation of the connecting shaft 23 will drive the active synchronous wheel 26 to rotate. The rotation of the active synchronous wheel 26 drives the transmission belt 27 to drive the driven synchronous wheel 26. The dynamic synchronous wheel 28 rotates, thereby driving the rotating shaft 6 to rotate, and then the operating end 2 is driven to rotate through the rotation of the rotating shaft 6, thereby changing the vertical and horizontal state of the operating end 2. After the operating end 2 is adjusted to a suitable position, the telescopic rod 35 is extended to allow the push rod 36 to push the connecting rod 33. At this time, the connecting rod 33 will cause the conical block 32 to squeeze the moving column 31 so that the moving column 31 moves away from the axis of the connecting shaft 23. Therefore, all the groups of extrusion sheets 30 begin to move outward, and the connecting shaft 23 is limited by the extrusion between the extrusion sheet 30 and the limit block 29 to improve stability.

[0024] See also Figure 1 and Figure 5 In this solution, limit plates 38 are installed on both sides of the active synchronous wheel 26 and the driven synchronous wheel 28, and the transmission belt 27 is located between the two sets of limit plates 38 to prevent the transmission belt 27 from slipping; a heat dissipation hole is opened on the fixed part 4 at the position of the first motor 11 to facilitate the heat dissipation of the first motor 11 and improve its service life.

[0025] Working principle: when the operating end 2 needs to be adjusted, the push rod 36 is first pulled to move by the action of the telescopic rod 35. During the process of pushing the rod 36, the two sets of tapered blocks 32 will be pulled to move by the connecting rod 33. The movement of the tapered block 32 causes the moving column 31 to drive the extrusion sheet 30 to move. At this time, the extrusion sheet 30 will be away from the limit block 29. At this time, the connecting shaft 23 will lose the limit of the limit block 29, and then the second motor 22 is started. At this time, the second motor 22 will drive the connecting shaft 23 to rotate, and the rotation of the connecting shaft 23 will drive the active synchronous wheel 26 to rotate. The rotation of the active synchronous wheel 26 drives the transmission belt 27 to drive the driven synchronous wheel 28 to rotate, thereby driving the rotating shaft 6 to rotate, and then through The rotation of the rotating shaft 6 drives the operating end 2 to rotate, thereby changing the vertical and horizontal forms of the operating end 2. After the operating end 2 is adjusted to a suitable position, the telescopic rod 35 is extended to allow the push rod 36 to push the connecting rod 33. At this time, the connecting rod 33 will cause the conical block 32 to squeeze the movable column 31 so that the movable column 31 moves away from the axis of the connecting shaft 23, thereby causing all the groups of extrusion sheets 30 to start moving outward. The connecting shaft 23 is limited by the extrusion between the extrusion sheet 30 and the limit block 29 to improve stability. If the angle of the operating end 2 needs to be changed later, the first motor 11 can be controlled to start. When the first motor 11 is started, the fixed plate 16 will be rotated. When the fixed plate 16 rotates During the process, the inclined block 15 will rotate, and the connecting ring 13 will move downward through the cooperation between the inclined block 15 and the inclined groove 14. The downward movement of the connecting ring 13 will drive the connecting plate 12 to move the sliding column 8 downward, thereby driving the limiting plate 7 downward. When the limiting plate 7 moves downward and away from the fixing part 4, the fixing part 4 loses the limiting effect of the limiting plate 7, and at the same time, the protrusion 18 will fit on one side of the blocking block 20. At this time, the continuous rotation of the first motor 11 will cause the protrusion 18 to squeeze the blocking block 20 so that the blocking block 20 and the protrusion 18 rotate synchronously, thereby causing the connecting ring 13 to drive the sliding column 8 to rotate, thereby driving the limiting plate 7 to rotate, and the rotation of the limiting plate 7 makes the rotating part 5 rotate, thereby adjusting the angle of the operating end 2. After completion, the first motor 11 stops starting. At this time, the tension spring 9 will pull the limit plate 7 to reset and limit the fixed part 4 again. In the process of the limit plate 7 moving downward, the limit block 29 will be driven to move downward. After the limit block 29 moves downward, it will continue to be squeezed with the extrusion sheet 30 to limit the connecting shaft 23 and improve its stability. It is worth noting that: when the first adjusting component adjusts the operating end 2, the limit block 29 limits the connecting shaft 23. Therefore, during the adjustment of the first adjusting component, the rotating shaft 6 will not rotate, and during the adjustment of the second adjusting component, the fixed part 4 and the rotating part 5 are limited by the limit plate 7, so the rotating part 5 will not rotate, thereby improving the stability during adjustment.

[0026] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0027] 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 vertical-horizontal conversion mechanism for a CNC machine tool spindle, comprising: A shaft body (1) and an operating end (2); The shaft body (1) comprises a fixed portion (4) and a rotating portion (5); the rotating portion (5) is fixedly connected to a connecting frame (3); the connecting frame (3) is rotatably connected to a rotating shaft (6); and the rotating shaft (6) is fixedly connected to the operating end portion (2); It is characterized by further comprising: a first adjustment component, the first adjustment component being installed in the fixed portion (4) and extending into the rotating portion (5), the first adjustment component being used to drive the rotating portion (5) to rotate; A second adjustment component, the second adjustment component is mounted on the rotating portion (5) and cooperates with the first adjustment component, and the second adjustment component is used to drive the operating end portion (2) to rotate.

2. The vertical-horizontal conversion mechanism of a CNC machine tool spindle according to claim 1, characterized in that: The first adjustment component comprises a limit plate (7) slidably mounted inside the rotating part (5), the limit plate (7) being arranged in close contact with the end of the fixed part (4), and a sliding column (8) slidably connected to the fixed part (4) is fixedly connected to the limit plate (7), the end of the sliding column (8) is connected to a transmission member (10), a tension spring (9) is sleeved on the outer side surface of the sliding column (8), the two ends of the tension spring (9) are respectively fixedly connected to the fixed part (4) and the transmission member (10), and the transmission member (10) is connected to a first motor (11) mounted inside the fixed part (4).

3. The vertical-horizontal conversion mechanism of a CNC machine tool spindle according to claim 2, characterized in that: The transmission member (10) comprises a connecting plate (12) fixedly connected to the sliding column (8), the connecting plate (12) being fixedly connected to the end of the tension spring (9), and a connecting ring (13) being fixedly connected to the connecting plate (12), a plurality of groups of inclined grooves (14) being provided on the connecting ring (13), inclined blocks (15) being slidably connected inside the inclined grooves (14), fixed plates (16) being fixedly connected to the ends of the plurality of groups of inclined blocks (15), and a blocking member (17) for blocking the inclined blocks (15) from continuing to move being connected between the inclined blocks (15) and the connecting ring (13).

4. The vertical-horizontal conversion mechanism of a CNC machine tool spindle according to claim 3, characterized in that: The blocking member (17) comprises a protrusion (18) fixedly connected to the inclined block (15); a blocking block (20) is installed on the outer side of the protrusion (18); the blocking block (20) is installed at a position close to the end of the connecting ring (13) and is located at the end of the inclined groove (14); and a supporting column (19) fixedly connected to the connecting ring (13) is fixedly connected to the blocking block (20).

5. The vertical-horizontal conversion mechanism of a CNC machine tool spindle according to claim 2, characterized in that: The second adjustment assembly comprises a support frame (21) fixedly connected to the connecting frame (3); a second motor (22) is fixedly connected to the support frame (21); an output end of the second motor (22) is fixedly connected to a connecting shaft (23); a limiting member (24) connected to the limiting plate (7) is connected to the connecting shaft (23); and a linkage member (25) connected to the rotating shaft (6) is also connected to the connecting shaft (23).

6. The vertical-horizontal conversion mechanism of a CNC machine tool spindle according to claim 5, characterized in that: The linkage member (25) comprises a driving synchronous wheel (26) fixedly connected to the connecting shaft (23); a transmission belt (27) is meshed on the outer side surface of the driving synchronous wheel (26); and a driven synchronous wheel (28) fixedly connected to the rotating shaft (6) is drivingly connected to the transmission belt (27).

7. The vertical-horizontal conversion mechanism of a CNC machine tool spindle according to claim 5, characterized in that: The limiting member (24) comprises a limiting block (29) sleeved on the outer side surface of the connecting shaft (23), the limiting blocks (29) being provided in two groups and being symmetrically distributed, the outer side surface of the connecting shaft (23) being provided with a plurality of groups of extrusion sheets (30) arranged in a circumferential manner, the extrusion sheets (30) being located inside the limiting block (29), and a moving column (31) slidably connected to the connecting shaft (23) being fixedly connected to the extrusion sheet (30), the end of the moving column (31) being slidably connected to a conical block (32), a connecting rod (33) being fixedly connected between the two groups of the conical blocks (32), and the end of the connecting rod (33) being connected to a pushing member (34).

8. The vertical-horizontal conversion mechanism of a CNC machine tool spindle according to claim 7, characterized in that: The pushing member (34) comprises a telescopic rod (35) fixed to one end of the connecting shaft (23), a push rod (36) being provided at the telescopic end of the telescopic rod (35), and a connecting block (37) fixedly connected to the connecting rod (33) being fixedly connected to the end of the push rod (36).

9. The vertical-horizontal conversion mechanism of a CNC machine tool spindle according to claim 6, characterized in that: Limiting plates (38) are installed on both sides of the active synchronous wheel (26) and the driven synchronous wheel (28), and the transmission belt (27) is located between two sets of the limiting plates (38).

10. The vertical-horizontal conversion mechanism of a CNC machine tool spindle according to claim 2, characterized in that: A heat dissipation hole is provided on the fixing portion (4) at a position located at the first motor (11).

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