Numerical control machining device for transmission shaft machining

Abstract

The invention discloses a numerical control machining device for transmission shaft machining. The numerical control machining device comprises a workbench, an L-shaped fixed plate, a top plate, a supporting block, a gear, a driving motor, a fixed inclined plate, a fixed clamping plate, a concave movable plate, a sliding block, a sliding groove, a rack, a movable inclined plate and a movable clamping plate. An L-shaped fixing plate is installed on one side of the upper portion of the workbench, a top plate is installed above the L-shaped fixing plate, a supporting block is installed on one side of the lower portion of the top plate, one end of a gear is connected with the supporting block through a bearing, and the other end of the gear penetrates through the side wall of the L-shaped fixing plate to be connected with an output shaft coupler of a driving motor. A fixed inclined plate is fixedly connected to the lower portion of the top plate, and a fixed clamping plate is fixedly connected to the tail end of the fixed inclined plate. A concave moving plate is slidably mounted below the top plate, two sliding blocks are coaxially arranged above the concave moving plate, double positioning can be conducted on a transmission shaft, the fixing effect is improved, and meanwhile, a machining position is flushed and cleaned.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of transmission shaft processing, in particular to the technical field of a transmission shaft processing numerical control machining device. BACKGROUND

[0002] The transmission shaft is an important component for transmitting power in the automobile transmission system, which functions to transmit power from the engine to the wheels together with the gearbox and drive axle to drive the automobile.

[0003] The transmission shaft needs to be processed under the action of the numerical control lathe in the production process, but the existing transmission shaft is fixed in position and cannot adjust the fixing height of the workpiece by adjusting the height of the transmission shaft, so that larger workpieces cannot be processed.

[0004] To solve the problems raised in the above-mentioned technology, for example, application No. CN201922026840.6 discloses a transmission shaft for numerical control lathe, which comprises a first transmission shaft and a second transmission shaft, a connecting shaft is arranged between the first transmission shaft and the second transmission shaft, both ends of the connecting shaft are fixedly connected with a universal joint, a shaft sleeve is sleeved on the outer side of the second transmission shaft, and the shaft sleeve is slidably connected with the lathe platform through a lifting rod, so that the height of the second transmission shaft can be adjusted by adjusting the height of the lifting rod, thereby adjusting the position of the workpiece connected with the second transmission shaft. When the diameter of the workpiece is large, the workpiece will be pressed against the operation platform of the lathe, and the existing transmission shaft is fixed in position and cannot adjust the fixing height of the workpiece by adjusting the height of the transmission shaft.

[0005] However, the above-mentioned device lacks a corresponding scrap collecting mechanism, and the worker still needs to clean and collect the scraps in the lathe after processing the transmission shaft, which is time-consuming and laborious, resulting in poor practicability, so the existing equipment needs to be improved.

[0006] To solve the problems raised in the above-mentioned technology, for example, application No. CN202123012588.7 discloses a transmission shaft processing numerical control lathe, which comprises a lathe, a conveying device, a cleaning device and a dust removal device. The conveying device is installed in the interior of the lathe to convey the scraps, the cleaning device is installed on the right part of the lathe to clean the conveying device, and the dust removal device is installed on the top of the lathe to clean the dust. The shaft is fixed on the chuck, the chuck is driven by the driving device to make the chuck drive the shaft to rotate, the moving part is close to the shaft, the turning tool on the moving part turns the shaft, and the scraps generated by the turning fall to the top end of the transmission belt through the discharge port on the lathe bed. By opening the first motor, the transmission belt is driven by the two groups of transmission shafts to run, the scraps are conveyed from left to right, and the scraps are discharged through the exhaust port of the lathe bed for centralized treatment.

[0007] However, the above-mentioned device still has the following defects: The fixed structure of the numerical control lathe can only position a single position of the transmission shaft, cannot double-position the workpiece, is prone to deviation when the transmission shaft rotates, and thus reduces the quality of the workpiece, and is inconvenient for flushing and cleaning the machining position. SUMMARY

[0008] The present application aims to solve the problems in the prior art and provides a transmission shaft machining numerical control machining device which can double-position the transmission shaft, improve the fixing effect, and flush and clean the machining position.

[0009] To achieve the above-mentioned purpose, the present application provides a transmission shaft machining numerical control machining device, which comprises a workbench, an L-shaped fixed plate, a top plate, a support block, a gear, a driving motor, a fixed inclined plate, a fixed clamping plate, a concave moving plate, a sliding block, a sliding groove, a rack, a moving inclined plate, and a moving clamping plate. An L-shaped fixed plate is installed on one side of the top of the workbench, a top plate is installed on the top of the L-shaped fixed plate, a support block is installed on one side of the bottom of the top plate, one end of the gear is connected with the support block through a bearing, and the other end of the gear is connected with the output shaft coupling of the driving motor through the side wall of the L-shaped fixed plate. A fixed inclined plate is fixedly connected to the bottom of the top plate, and a fixed clamping plate is fixedly connected to the end of the fixed inclined plate. A concave moving plate is slidingly installed on the bottom of the top plate, two sliding blocks are coaxially arranged on the top of the concave moving plate, two sliding grooves are formed in the bottom of the top plate and matched with the sliding blocks, the concave moving plate is connected with the top plate by inserting the sliding blocks into the sliding grooves, a rack is arranged on the bottom of the concave moving plate, the rack is connected with the gear in meshing mode, a moving inclined plate is arranged on one side of the bottom of the concave moving plate, and a moving clamping plate is installed on the end of the moving inclined plate. The moving clamping plate is in left-right correspondence with the fixed clamping plate.

[0010] Preferably, one side of the moving clamping plate and the fixed clamping plate, which are close to each other, is provided with an anti-skid pattern.

[0011] Preferably, two first T-shaped grooves are formed in the side walls of the moving clamping plate and the fixed clamping plate, a first T-shaped block is inserted into each of the two first T-shaped grooves, a limiting plate is jointly installed between the first T-shaped blocks, a threaded hole is formed in the side wall of the limiting plate, a threaded rod is threadedly connected into the threaded hole, a limiting block is fixedly connected to one end of the threaded rod, and a hand wheel is fixedly connected to the other end of the threaded rod.

[0012] Preferably, the clamping surface of the limiting block is in V-shaped structure, and the two limiting blocks are in left-right correspondence.

[0013] Preferably, an L-shaped moving plate is installed on the other side of the top of the workbench, a drill rod is installed on the side wall of the L-shaped moving plate, and one end of the drill rod is connected with the output shaft coupling of the drilling motor through the side wall of the L-shaped moving plate.

[0014] As preferred, two second T-shaped grooves are formed on the workbench, and a second T-shaped block is slidably arranged in each of the two second T-shaped grooves.

[0015] As preferred, a concave support is mounted on the workbench, and a waste flushing mechanism is arranged on the concave support, the waste flushing mechanism comprising a water storage tank, a water pump, a water suction pipe, a water transmission pipe, a water collecting pipe and a spray head, the water storage tank and the water pump are both mounted above the concave support, the input end of the water pump is connected with the water storage tank through the water pump, the output end of the water pump is connected with the water transmission pipe, the water transmission pipe penetrates through the lower portion of the concave support and is connected with the water collecting pipe, and a plurality of spray heads are arranged at equal intervals below the water collecting pipe.

[0016] As preferred, a drain port is formed in the middle portion of the workbench, and the drain port corresponds to the spray head.

[0017] As preferred, a water collecting tank is mounted below the workbench, and the water collecting tank corresponds to the drain port.

[0018] The present application has the following advantages: 1. The gear, drive motor, fixed clamping plate, sliding block, sliding groove, rack, movable clamping plate and limiting plate are cooperated to achieve double positioning of the transmission shaft, the drive motor drives the output shaft to rotate the gear, the gear is engaged with the rack below the concave moving plate to drive the concave moving plate to translate along the sliding groove below the top plate, the sliding block above the concave moving plate moves synchronously in the sliding groove, the movable clamping plate and the fixed clamping plate are close to or away from each other, the transmission shaft is clamped or released in the radial direction, the transmission shaft is positioned for the first time, then the operator rotates the hand wheel to drive the threaded rod to axially advance in the threaded hole of the limiting plate, the V-shaped limiting block at the end of the threaded rod moves towards the transmission shaft, the two V-shaped limiting blocks are synchronously abutted from both sides of the transmission shaft, the V-shaped slope is self-adapted to the outer wall of the transmission shaft to form an auxiliary positioning constraint perpendicular to the main clamping direction, the transmission shaft is positioned for the second time, the two positioning forces are perpendicular to each other to constrain the radial degree of freedom of the transmission shaft, and the anti-skid pattern enhances the friction force of the clamping surface to greatly improve the clamping effect. 2. The water storage tank, water pump, water suction pipe, water transmission pipe, water collecting pipe and spray head are cooperated to clean the machining position of the workpiece, the water pump extracts cleaning liquid from the water storage tank, the cleaning liquid is delivered to the water collecting pipe through the water transmission pipe, the spray heads uniformly distributed below the water collecting pipe direct the cleaning liquid to the machining area of the transmission shaft to realize local cleaning and cooling of the machining point, the drain port formed in the middle portion of the workbench corresponds to the position of the spray head, the waste liquid generated during machining flows into the water collecting tank below through the drain port, and the water collecting tank collects the waste liquid to achieve the cleaning effect and improve the machining quality. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 is a front view of a transmission shaft machining numerical control machining device of the present application; Figure 2 is a schematic diagram of the structure above the workbench of a transmission shaft machining numerical control machining device of the present application; Figure 3 is a schematic diagram of the lower part of a concave moving plate of a transmission shaft machining numerical control machining device of the present application; Figure 4 is a schematic diagram of the lower part of a fixed inclined plate of a transmission shaft machining numerical control machining device of the present application; Figure 5 is a schematic diagram of the connection between a moving clamping plate and a limiting plate of a transmission shaft machining numerical control machining device of the present application; Figure 6 is a schematic diagram of the connection between a fixed clamping plate and a limiting plate of a transmission shaft machining numerical control machining device of the present application; In the figure: 1 - workbench, 2 - L-shaped fixed plate, 3 - top plate, 4 - support block, 5 - gear, 6 - drive motor, 7 - fixed inclined plate, 8 - fixed clamping plate, 9 - concave moving plate, 10 - sliding block, 11 - sliding slot, 12 - rack, 13 - moving inclined plate, 14 - moving clamping plate, 15 - anti-skid pattern, 16 - first T-shaped groove, 17 - first T-shaped block, 18 - limiting plate, 19 - threaded rod, 20 - limiting block, 21 - hand wheel, 22 - L-shaped moving plate, 23 - drill rod, 24 - drilling motor, 25 - second T-shaped groove, 26 - second T-shaped block, 27 - concave bracket, 28 - waste flushing mechanism, 281 - water storage tank, 282 - water suction pump, 283 - water suction pipe, 284 - water transmission pipe, 285 - water collecting pipe, 286 - spraying head, 29 - drainage opening, 30 - water collecting tank. DETAILED DESCRIPTION

[0020] Example One Reference Figures 1 to 6The application discloses a transmission shaft machining numerical control machining device, which comprises a workbench 1, an L-shaped fixed plate 2, a top plate 3, a supporting block 4, a gear 5, a driving motor 6, a fixed inclined plate 7, a fixed clamping plate 8, a concave movable plate 9, a sliding block 10, a sliding groove 11, a rack 12, a movable inclined plate 13 and a movable clamping plate 14. The L-shaped fixed plate 2 is installed on one side above the workbench 1, the top plate 3 is installed above the L-shaped fixed plate 2, the supporting block 4 is installed on one side below the top plate 3, one end of the gear 5 is connected with the supporting block 4 through a bearing, and the other end of the gear 5 penetrates the side wall of the L-shaped fixed plate 2 and is connected with the output shaft coupling of the driving motor 6. The fixed inclined plate 7 is fixedly connected below the top plate 3, and the fixed clamping plate 8 is fixedly connected to the tail end of the fixed inclined plate 7. The concave movable plate 9 is slidingly installed below the top plate 3, two sliding blocks 10 are coaxially arranged above the concave movable plate 9, two sliding grooves 11 adapted to the sliding blocks 10 are formed below the top plate 3, the concave movable plate 9 is connected with the top plate 3 by being inserted into the sliding grooves 11 through the sliding blocks 10, the rack 12 is arranged below the concave movable plate 9, the rack 12 is in meshing connection with the gear 5, the movable inclined plate 13 is arranged on one side below the concave movable plate 9, the movable clamping plate 14 is installed at the tail end of the movable inclined plate 13, the movable clamping plate 14 is in left-right correspondence with the fixed clamping plate 8, the output shaft is driven to rotate the gear 5 by the driving motor 6, the gear 5 is in meshing transmission with the rack 12 below the concave movable plate 9, thereby driving the concave movable plate 9 to directionally translate along the sliding grooves 11 below the top plate 3, meanwhile, the sliding blocks 10 above the concave movable plate 9 are synchronously moved in the sliding grooves 11, the movable clamping plate 14 and the fixed clamping plate 8 are close to or away from each other, so that the radial clamping or releasing of the transmission shaft is realized, and the transmission shaft is positioned for the first time.

[0021] Referring to Figure 4 , one side of the movable clamping plate 14 and the fixed clamping plate 8, which are close to each other, is provided with anti-skid lines 15, so that the friction force on the transmission shaft can be increased.

[0022] Embodiment two Referring to Figure 3 and Figure 4The side wall of the mobile clamping plate 14 and the fixed clamping plate 8 is provided with two first T-shaped grooves 16, and the first T-shaped blocks 17 are inserted into the two first T-shaped grooves 16, the first T-shaped blocks 17 are jointly installed with the limiting plate 18, the side wall of the limiting plate 18 is provided with a threaded hole, the threaded hole is threadedly connected with the threaded rod 19, one end of the threaded rod 19 is fixedly connected with the limiting block 20, and the other end of the threaded rod 19 is fixedly connected with the hand wheel 21. By additionally arranging the first T-shaped blocks 17, the limiting plate 18 can move on the clamping plate, so that the position is adjusted and the clamping effect on the transmission shaft is improved. The operator rotates the hand wheel 21, drives the threaded rod 19 to axially advance in the threaded hole of the limiting plate 18, and then drives the V-shaped limiting block 20 at the end of the threaded rod 19 to move towards the transmission shaft. The two V-shaped limiting blocks 20 are synchronously abutted from both sides of the transmission shaft, and the V-shaped inclined surface is self-adapted to the outer wall of the transmission shaft to form auxiliary positioning constraints perpendicular to the main clamping direction, so that the transmission shaft is positioned for the second time.

[0023] Referring to Figure 3 and Figure 5 The clamping surface of the limiting block 20 is in a V-shaped structure, and the two limiting blocks 20 correspond to each other. When the two limiting blocks 20 are close to each other, the V-shaped clamping surface can be tightly abutted on the surface of the transmission shaft, thereby achieving the effect of fixing.

[0024] Referring to Figure 1 The upper side of the workbench 1 is provided with an L-shaped moving plate 22, the side wall of the L-shaped moving plate 22 is provided with a drill rod 23, one end of the drill rod 23 penetrates through the side wall of the L-shaped moving plate 22 and is connected with the output shaft of the drilling motor 24 through a shaft coupling, the output shaft is driven to rotate by the drilling motor 24, and then the drill rod 23 is rotated, so that the transmission shaft is processed.

[0025] Example three Referring to Figure 2 Two second T-shaped grooves 25 are formed in the workbench 1, and the second T-shaped blocks 26 are slidably arranged in the two second T-shaped grooves 25, and the upper sides of the second T-shaped blocks 26 are fixedly connected with the lower side of the L-shaped moving plate 22. The second T-shaped blocks 26 move in the second T-shaped grooves 25, thereby driving the L-shaped moving plate 22 to move, so that the distance between the drill rod 23 and the transmission shaft is adjusted, and transmission shafts of different lengths are processed.

[0026] Example four Referring to Figure 1The workbench 1 is provided with a concave support 27, and a waste flushing mechanism 28 is arranged on the concave support 27. The waste flushing mechanism 28 comprises a water storage tank 281, a water pump 282, a water suction pipe 283, a water transmission pipe 284, a water collecting pipe 285 and a spray head 286. The water storage tank 281 and the water pump 282 are both arranged above the concave support 27. The input end of the water pump 282 is connected with the water storage tank 281 through the water pump 282. The output end of the water pump 282 is connected with the water transmission pipe 284. The water transmission pipe 284 penetrates through the concave support 27 below and is connected with the water collecting pipe 285. A plurality of spray heads 286 are arranged below the water collecting pipe 285 at equal intervals. The cleaning liquid is extracted from the water storage tank 281 by the water pump 282, is transported to the water collecting pipe 285 through the water transmission pipe 284, and is sprayed to the transmission shaft machining area by the spray heads 286 arranged below the water collecting pipe 285, so that the local cleaning and cooling of the machining point are realized.

[0027] Referring to Figure 1 The workbench 1 is provided with a concave support 27, and a waste flushing mechanism 28 is arranged on the concave support 27. The waste flushing mechanism 28 comprises a water storage tank 281, a water pump 282, a water suction pipe 283, a water transmission pipe 284, a water collecting pipe 285 and a spray head 286. The water storage tank 281 and the water pump 282 are both arranged above the concave support 27. The input end of the water pump 282 is connected with the water storage tank 281 through the water pump 282. The output end of the water pump 282 is connected with the water transmission pipe 284. The water transmission pipe 284 penetrates through the concave support 27 below and is connected with the water collecting pipe 285. A plurality of spray heads 286 are arranged below the water collecting pipe 285 at equal intervals. The cleaning liquid is extracted from the water storage tank 281 by the water pump 282, is transported to the water collecting pipe 285 through the water transmission pipe 284, and is sprayed to the transmission shaft machining area by the spray heads 286 arranged below the water collecting pipe 285, so that the local cleaning and cooling of the machining point are realized.

[0028] Referring to Figure 1 The workbench 1 is provided with a concave support 27, and a waste flushing mechanism 28 is arranged on the concave support 27. The waste flushing mechanism 28 comprises a water storage tank 281, a water pump 282, a water suction pipe 283, a water transmission pipe 284, a water collecting pipe 285 and a spray head 286. The water storage tank 281 and the water pump 282 are both arranged above the concave support 27. The input end of the water pump 282 is connected with the water storage tank 281 through the water pump 282. The output end of the water pump 282 is connected with the water transmission pipe 284. The water transmission pipe 284 penetrates through the concave support 27 below and is connected with the water collecting pipe 285. A plurality of spray heads 286 are arranged below the water collecting pipe 285 at equal intervals. The cleaning liquid is extracted from the water storage tank 281 by the water pump 282, is transported to the water collecting pipe 285 through the water transmission pipe 284, and is sprayed to the transmission shaft machining area by the spray heads 286 arranged below the water collecting pipe 285, so that the local cleaning and cooling of the machining point are realized.

[0029] It should be noted that a controller (not shown in the figure) is arranged on the side wall of the workbench 1 in the present application. The driving motor 6, the drilling motor 24 and the water pump 282 are electrically connected with the controller. The driving motor 6, the drilling motor 24 and the water pump 282 are controlled to be turned on or turned off through the controller. The driving motor 6, the drilling motor 24 and the water pump 282 all adopt existing devices, so the specific models are not described.

[0030] The working process of the present application is as follows: The transmission shaft machining numerical control machining device in the working process, through the driving motor 6 drive output shaft drive gear 5 rotation, gear 5 and the recessed plate 9 below the rack 12 meshing transmission, and then drive the recessed plate 9 along the top plate 3 below the slide groove 11 directional translation, while the slider 10 above the recessed plate 9 in the slide groove 11 synchronous movement, make the moving clamping plate 14 and fixed clamping plate 8 close to each other or away from each other, so as to realize the radial clamping or release of transmission shaft, and then the operator rotates the hand wheel 21, drive screw rod 19 in the limiting plate 18 threaded hole axial advance, and then drive the V-shaped limiting block 20 at the end of the threaded rod 19 to move to the transmission shaft direction, two V-shaped limiting block 20 is respectively from the transmission shaft both sides synchronous resistance tight, through the V-shaped slope adaptive fit transmission shaft outer wall, form perpendicular to the main clamping direction of auxiliary positioning constraint, so as to the second positioning of transmission shaft, fixed after drilling motor 24 drive output shaft rotation and then drive the drill pipe 23 rotation, so as to the transmission shaft machining, after processing through the water pump 282 from the water tank 281 extraction cleaning fluid, through the water pipe 284 is transported to the water collector pipe 285, the water collector pipe 285 below evenly distributed spray head 286 will cleaning fluid directional injection to the transmission shaft machining area, realize the local cleaning and cooling of processing point, the drain 19 in the workbench 1 middle part is opened, and the spray head 286 position corresponds, the waste liquid generated by processing flows into the water collector tank 30 below the drain 29, the water collector tank 30 collects waste liquid, so as to play the effect of cleaning.

[0031] The control mode of the present application is controlled by manually starting and closing the switch. The wiring diagram of the power element and the provision of the power source are well known in the art. The present application is mainly used to protect mechanical devices, so the control mode and wiring arrangement will not be explained in detail.

[0032] The above examples are illustrative of the present application and are not limiting. Any simple transformation of the present application falls within the scope of the present application.

Claims

1. A transmission shaft machining numerical control machining device, characterized by: Including workbench (1), L-shaped fixed plate (2), top plate (3), support block (4), gear (5), drive motor (6), fixed inclined plate (7), fixed clamping plate (8), concave moving plate (9), sliding block (10), sliding slot (11), rack (12), moving inclined plate (13) and moving clamping plate (14);The workbench (1) is installed on one side above L-shaped fixed plate (2), the top plate (3) is installed above the L-shaped fixed plate (2), the support block (4) is installed on one side below the top plate (3), one end of the gear (5) is connected with the support block (4) through the bearing, the other end of the gear (5) penetrates the side wall of the L-shaped fixed plate (2) and is connected with the output shaft coupling of the drive motor (6);The fixed inclined plate (7) is fixedly connected below the top plate (3), and the fixed clamping plate (8) is fixedly connected to the end of the fixed inclined plate (7);The concave moving plate (9) is slidably installed below the top plate (3), the two sliding blocks (10) are coaxially arranged above the concave moving plate (9), two sliding slots (11) are formed in the top plate (3), the concave moving plate (9) is connected with the top plate (3) by inserting the sliding block (10) into the sliding slot (11), the rack (12) is arranged below the concave moving plate (9), the rack (12) is engagedly connected with the gear (5), the moving inclined plate (13) is arranged on one side below the concave moving plate (9), the moving clamping plate (14) is installed at the end of the moving inclined plate (13), and the moving clamping plate (14) is correspondingly arranged on the left and right sides of the fixed clamping plate (8).

2. A transmission shaft machining numerical control machining device according to claim 1, characterized in that: The moving clamping plate (14) and the fixed clamping plate (8) are provided with anti-skid lines (15) on the side close to each other.

3. A kind of transmission shaft processing numerical control processing device according to claim 1, wherein: The side wall of the moving clamping plate (14) and the fixed clamping plate (8) is provided with two first T-shaped grooves (16), two first T-shaped blocks (17) are inserted into the two first T-shaped grooves (16), a limiting plate (18) is jointly installed between the two first T-shaped blocks (17), a threaded hole is formed in the side wall of the limiting plate (18), a threaded rod (19) is screwed into the threaded hole, one end of the threaded rod (19) is fixedly connected with a limiting block (20), and the other end of the threaded rod (19) is fixedly connected with a hand wheel (21).

4. A transmission shaft machining numerical control machining device according to claim 3, characterized in that: The clamping surface of the limiting block (20) is V-shaped, and the two limiting blocks (20) are correspondingly arranged on the left and right sides.

5. A transmission shaft machining numerical control machining device according to claim 1, characterized in that: The other side of the workbench (1) is provided with an L-shaped moving plate (22), a drill rod (23) is installed on the side wall of the L-shaped moving plate (22), and one end of the drill rod (23) penetrates the side wall of the L-shaped moving plate (22) and is connected with the output shaft coupling of a drilling motor (24).

6. A transmission shaft machining numerical control machining device according to claim 5, characterized in that: Two second T-shaped grooves (25) are formed in the workbench (1), and a second T-shaped block (26) is slidably arranged in each of the two second T-shaped grooves (25), and the upper surface of the second T-shaped block (26) is fixedly connected with the lower surface of the L-shaped moving plate (22).

7. A transmission shaft machining numerical control machining device according to claim 1, characterized in that: The workbench (1) is provided with a concave support (27), and a waste flushing mechanism (28) is arranged on the concave support (27). The waste flushing mechanism (28) comprises a water storage tank (281), a water pump (282), a water suction pipe (283), a water transmission pipe (284), a water collecting pipe (285) and a spray head (286). The water storage tank (281) and the water pump (282) are both arranged above the concave support (27). The input end of the water pump (282) is connected with the water storage tank (281) through the water pump (282). The output end of the water pump (282) is connected with the water transmission pipe (284). The tail end of the water transmission pipe (284) penetrates through the concave support (27) below and is connected with the water collecting pipe (285). A plurality of spray heads (286) are arranged below the water collecting pipe (285) at equal intervals.

8. A transmission shaft machining numerical control machining device according to claim 7, characterized in that: A drainage opening (29) is arranged in the middle of the workbench (1), and the drainage opening (29) corresponds to the spray head (286).

9. A transmission shaft machining numerical control machining device according to claim 8, characterized in that: A water collecting tank (30) is arranged below the workbench (1), and the water collecting tank (30) corresponds to the drainage opening (29).

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