A numerical control machine tool chuck assembly balance detection device

Abstract

This invention relates to the technical field of detection structures, and in particular to a CNC machine tool chuck assembly balance detection device, comprising an amplitude detection unit and a base ring coaxially arranged with the external spindle. The base ring is sleeved on the outside of the chuck mounted on the spindle, and the base ring is rotatable on the chuck. By keeping the chuck and spindle stationary and performing balance detection on them, the risk of assembly accuracy loss caused by high-speed rotation of the chuck and spindle can be effectively eliminated, improving assembly quality. Simultaneously, it facilitates the elimination of rotational kinetic energy of the chuck and spindle, avoiding severe vibration at high speeds due to assembly errors, thus improving safety. The reciprocating impact of the impact column on the chuck along the radial direction of the base ring ensures that the impact force on the chuck is perpendicular to the chuck's rotation axis, thereby highlighting the vibration amplitude when the chuck is eccentric and improving detection sensitivity.

Description

Technical Field

[0001] This invention relates to the technical field of detection structures, and in particular to a device for detecting the balance of CNC machine tool chuck assembly. Background Technology

[0002] As a core functional component of CNC machine tools, the chuck is usually installed on the machine tool spindle by means of bolts or other connections. It is used to clamp the workpiece and transmit motion and power. During the assembly process of the chuck, the fitting accuracy between the chuck and the spindle and the uniformity of its own mass distribution directly affect the dynamic performance of the whole machine. After the chuck is assembled, a dynamic balancing test is required to check whether its assembly state meets the design requirements, so as to avoid the chuck causing severe vibration of the machine tool due to unbalanced centrifugal force under high-speed rotation conditions.

[0003] Traditional balancing tests require the chuck and spindle to rotate at high speed together and their vibration amplitude to be measured. However, since the machine tool is still in the assembly stage at this time, the connection rigidity of the various structures on the machine tool is insufficient. High-speed rotation may cause relative displacement of parts that are not fully tightened, which will damage the initial assembly accuracy. At the same time, the chuck and spindle are both large mass components, and the rotational inertia of their combined rotating body is large. If the assembly error is large, the vibration amplitude of the chuck and spindle will be too large, resulting in severe vibration of the machine tool and posing a great danger to the operator and surrounding equipment. Summary of the Invention

[0004] To solve the above-mentioned technical problems, the present invention provides a CNC machine tool chuck assembly balance detection device, the specific technical solution of which is as follows:

[0005] The present invention discloses a CNC machine tool chuck assembly balance detection device, comprising an amplitude detection unit and a base ring coaxially arranged with an external spindle. The base ring is sleeved on the outside of the chuck mounted on the external spindle, and the base ring is rotatable on the chuck. On the vertical plane of the axis of the base ring, the base ring is fixedly arranged relative to the spindle. An impact column that reciprocates along the radial direction of the base ring is provided on the base ring, and an elastic pad is provided at the end of the impact column facing the chuck.

[0006] The amplitude detection unit is used to detect vibrations of the chuck and spindle along the direction of movement of the impact column.

[0007] Furthermore, the base ring is movable along its own axial direction.

[0008] Furthermore, the amplitude detection unit includes a movable base and a resistive element. The movement direction of the movable base and the length direction of the resistive element are both along the radial direction of the base ring and parallel to the movement direction of the impact column. One end of the resistive element is connected to an external power source. A conductive wheel is rotatably mounted on the movable base. The conductive wheel is rolled on the resistive element and is connected to an external power source. A spring is provided on the movable base to provide elastic force to the movable base.

[0009] Furthermore, the detection device also includes a turntable coaxially arranged with the base ring. A plurality of threaded rods are arranged in a ring on the turntable. The ends of the threaded rods pass through the turntable and are rotatably connected to the base ring. The threaded rods are threadedly connected to the turntable. A plurality of sliding grooves are formed on the threaded rods along their own axial direction. A transmission ring is sleeved on the outer side of the threaded rods. The transmission ring is rotatably arranged on the turntable, and a plurality of protrusions that cooperate with the sliding grooves are provided on the inner wall of the transmission ring. A drive wheel is provided on the turntable, and the drive wheel is driven by a transmission belt to drive the plurality of transmission rings.

[0010] The amplitude detection unit is located on the turntable.

[0011] Furthermore, a vibrating wheel is rotatably mounted on the base ring, and the vibrating wheel is rotatably connected to the impact column through an eccentrically mounted connecting rod. A vibrating motor is mounted on the turntable, and a transmission disc is mounted on the output end of the vibrating motor. The transmission disc is connected to the end face of the vibrating wheel through several telescopic rods.

[0012] Furthermore, the impact column is provided with an adjusting slider, and the position of the adjusting slider on the impact column along the direction of movement of the impact column is adjustable, and the end of the connecting rod is rotatably mounted on the adjusting slider.

[0013] Furthermore, the detection device also includes a base column, the turntable is rotatably mounted on the base column, the base column is provided with a handle and a main motor, and the main motor provides rotational power to the turntable through a transmission wheel;

[0014] The base column is provided with a clamping structure in the middle for fastening connection with the external spindle.

[0015] Furthermore, the clamping structure includes a horizontal cylinder, one end of which is installed in the middle of the base column, and the other end of which is inserted into the external main shaft. A side push column is provided inside the horizontal cylinder, one end of which is provided with a threaded rod II, and the threaded rod II is threadedly connected to the horizontal cylinder. The other end of the side push column is tapered, and several top blocks are slidably provided on the tapered surface. The top blocks slide through the horizontal cylinder in the radial or inclined direction, and the several top blocks press against the inner wall of the main shaft. The top blocks are provided with spring pieces for providing a force toward the axis of the horizontal cylinder.

[0016] The beneficial effects of this invention are as follows:

[0017] By keeping the chuck and spindle stationary and performing balance checks on them, the risk of assembly accuracy loss caused by high-speed rotation of the chuck and spindle can be effectively eliminated, improving assembly quality. Simultaneously, it facilitates the elimination of rotational kinetic energy from the chuck and spindle, preventing severe vibrations at high speeds due to assembly errors and enhancing safety. Utilizing the reciprocating impact of the impact pin along the radial direction of the base ring on the chuck ensures that the impact force on the chuck is perpendicular to its rotation axis, thus highlighting the vibration amplitude when the chuck is eccentric and improving detection sensitivity. Combined with the rotational motion of the base ring, this allows for comprehensive circumferential inspection of the chuck. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments recorded in the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 A schematic diagram of a CNC machine tool chuck assembly balance testing device;

[0020] Figure 2 This is a schematic diagram showing the distribution of the invention with the chuck and spindle;

[0021] Figure 3 for Figure 1 A schematic diagram of the exploded structure;

[0022] Figure 4 for Figure 3 A schematic diagram of the transfer tray;

[0023] Figure 5 for Figure 4 Schematic diagram of the middle base ring;

[0024] Figure 6 for Figure 4A magnified view of the structure at point A in the middle;

[0025] Figure 7 for Figure 3 Schematic diagram of the cross-sectional structure of the middle horizontal cylinder;

[0026] Figure label:

[0027] 1. Base ring; 2. Impact column; 3. Elastic pad; 4. Amplitude detection unit; 5. Moving seat; 6. Resistance element; 7. Conductive wheel; 8. Spring; 9. Turntable; 10. Threaded rod one; 11. Slide groove; 12. Transmission ring; 13. Transmission belt; 14. Drive wheel; 15. Vibration wheel; 16. Connecting rod; 17. Vibration motor; 18. Telescopic rod; 19. Adjusting slider; 20. Base column; 21. Handle; 22. Main motor; 23. Transmission wheel; 24. Cross cylinder; 25. Side push column; 26. Threaded rod two; 27. Top block; 28. Spring; 29. ​​Chuck; 30. Main shaft. Detailed Implementation

[0028] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments.

[0029] In the description of this invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0030] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; they can refer to mechanical connections or electrical connections; they can refer to direct connections or indirect connections through an intermediate medium; and they can refer to the internal communication between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. This embodiment is written in a progressive manner.

[0031] like Figures 1 to 7As shown, a CNC machine tool chuck assembly balance detection device of the present invention includes an amplitude detection unit 4 and a base ring 1 coaxially arranged with an external spindle 30. The base ring 1 is sleeved on the outside of the chuck 29 installed on the external spindle 30, and the base ring 1 can rotate on the chuck 29. On the vertical plane of the axis of the base ring 1, the base ring 1 is fixedly arranged relative to the spindle 30. An impact column 2 that reciprocates along the radial direction of the base ring 1 is provided on the base ring 1. An elastic pad 3 is provided at the end of the impact column 2 facing the chuck 29.

[0032] Among them, the amplitude detection unit 4 is used to detect the vibration of the chuck 29 and the spindle 30 along the movement direction of the impact column 2.

[0033] In this invention, the chuck 29 is mounted on the spindle 30, and the spindle 30 is mounted on the machine tool spindle box. After the chuck 29 is assembled, its balance needs to be tested. Since the chuck 29 is driven to rotate by the spindle 30, the axis of rotation of the chuck 29 is the axis of the spindle 30. The base ring 1 is coaxially set with the spindle 30, which allows the reference axis for measurement to be positioned. At the same time, the relatively fixed setting of the base ring 1 and the spindle 30 can connect the base ring 1 and the chuck 29 together, making it convenient to measure the chuck 29 with the axis of the base ring 1 as the reference axis, rather than with the axis of the chuck 29 as the reference axis.

[0034] The inner wall of the base ring 1 is separated from the outer wall of the chuck 29, and the base ring 1 can rotate circumferentially along the chuck 29. This allows the impact pin 2 on the base ring 1 to measure any position on the circumference of the chuck 29. The impact pin 2 can reciprocate radially along the base ring 1, repeatedly impacting the outer wall of the chuck 29, causing the chuck 29 to vibrate. On a plane perpendicular to the axis of the base ring 1, the center of gravity of the chuck 29 coincides with the axis of the base ring 1. At this time, the vibration amplitude of the chuck 29 is within a specified range. When the center of gravity of the chuck 29 deviates from the axis of the base ring 1, i.e., the main... There is a lever arm between the support point of shaft 30 on chuck 29 and the center of gravity of chuck 29. At this time, the vertical line connecting the center of gravity of chuck 29 and the axis of base ring 1 is used as the dividing line. When the impact column 2 is located on both sides of the dividing line, the vibration amplitude of chuck 29 caused by the impact of impact column 2 is inconsistent with the vibration amplitude of chuck 29 when impact column 2 is located on the extension line of the dividing line. The amplitude of chuck 29 exceeds the specified range. Therefore, the assembly of chuck 29 is checked for balance. At this time, chuck 29 and spindle 30 can be in a static state, realizing the dynamic balance test of chuck 29 in a static state.

[0035] Since the impact column 2 reciprocates along the radial direction of the base ring 1 and impacts the chuck 29, the impact force on the chuck 29 is perpendicular to its rotation axis. This makes the amplitude of the chuck 29 when its center of gravity is off-center more prominent and easier to detect.

[0036] It should be noted that since the axis of the chuck 29 is generally horizontal when it is installed, gravity will have a certain impact on the detection work of the chuck 29. At this time, the chuck 29 can be repeatedly tested by rotating the chuck 29 and adjusting its position multiple times to improve the detection accuracy. Of course, the interference of gravity on the detection results can also be reduced by increasing the impact intensity.

[0037] The elastic pad 3 can be used to reduce the impact damage of the impact column 2 to the chuck 29. The amplitude detection unit 4 can detect the vibration amplitude of the chuck 29 and the spindle 30. Since the detection direction of the amplitude detection unit 4 is consistent with the movement direction of the impact column 2, the chuck 29 can be detected more intuitively.

[0038] By keeping the chuck 29 and spindle 30 stationary and performing balance checks on them, the risk of assembly accuracy loss caused by the high-speed rotation of the chuck 29 and spindle 30 can be effectively eliminated, improving assembly quality. At the same time, it is easier to eliminate the rotational kinetic energy of the chuck 29 and spindle 30, avoiding severe vibration due to assembly errors during high-speed rotation and improving safety. By using the reciprocating impact of the impact column 2 on the chuck 29 along the radial direction of the base ring 1, the impact force on the chuck 29 can be made perpendicular to the rotation axis of the chuck 29, thus making it easier to highlight the vibration amplitude when the chuck 29 is eccentric, improving detection sensitivity. Combined with the rotational movement of the base ring 1, a comprehensive inspection of the circumference of the chuck 29 can be performed.

[0039] Furthermore, the base ring 1 is movable along its own axis.

[0040] In balance testing, when the thickness of the object being tested is small, the result of the static balance test can be used as the result of the dynamic balance test. However, when the thickness of the object is large, the object can be divided into multiple surfaces along the axis of rotation. The center of gravity of the object on each surface will be different. That is, the length, direction, and magnitude of the lever arm between each surface and the axis of rotation will be different. Once the object rotates, the centrifugal force on the object on different surfaces will be different. In this case, the static balance result of the object cannot be used as the dynamic balance result.

[0041] By enabling the base ring 1 to move along its own axis, the impact pin 2 on the base ring 1 can impact different positions on the outer wall of the chuck 29 along the axis of the base ring 1, thereby achieving comprehensive testing of the chuck 29.

[0042] Furthermore, the amplitude detection unit 4 includes a movable seat 5 and a resistor 6. The movement direction of the movable seat 5 and the length direction of the resistor 6 are both along the radial direction of the base ring 1 and parallel to the movement direction of the impact column 2. One end of the resistor 6 is connected to an external power source. A conductive wheel 7 is rotatably mounted on the movable seat 5. The conductive wheel 7 rolls on the resistor 6 and is connected to an external power source. A spring 8 is provided on the movable seat 5 to provide elastic force to the movable seat 5.

[0043] The two poles of the external power supply are connected to one end of the resistor 6 and the conductive wheel 7, respectively. When the impact column 2 impacts the chuck 29, the chuck 29 transmits the vibration to the amplitude detection unit 4 through the main shaft 30. The moving seat 5 in the amplitude detection unit 4 moves along the direction of movement of the impact column 2, the spring 8 undergoes elastic deformation, and the moving seat 5 drives the conductive wheel 7 to roll on the resistor 6. The resistance value of the resistor 6 connected to the circuit changes. Thus, the amplitude of movement of the moving seat 5 can be directly detected by detecting the resistance value, thereby detecting the vibration of the chuck 29.

[0044] It should be noted that the amplitude of the moving seat 5 and the amplitude of the chuck 29 can be divided into two systems. It is only necessary to increase the amplitude of the moving seat 5 proportionally when the amplitude of the chuck 29 increases. In this way, the amplitude of the chuck 29 can be directly reflected by the amplitude of the moving seat 5. Of course, for more accurate measurement, the correlation between the amplitude of the moving seat 5 and the amplitude of the chuck 29 can be determined by detecting the chuck 29 and the spindle 30 with known eccentricity, and then the actual measurement can be carried out.

[0045] Furthermore, the detection device also includes a turntable 9 coaxially arranged with the base ring 1. Several threaded rods 10 are arranged in a ring on the turntable 9. The ends of the threaded rods 10 pass through the turntable 9 and are rotatably connected to the base ring 1. The threaded rods 10 are threadedly connected to the turntable 9. Several sliding grooves 11 are opened on the threaded rods 10 along their own axis. A transmission ring 12 is sleeved on the outer side of the threaded rods 10. The transmission ring 12 is rotatably arranged on the turntable 9. Several protrusions that cooperate with the sliding grooves 11 are provided on the inner wall of the transmission ring 12. A drive wheel 14 is provided on the turntable 9. The drive wheel 14 and the several transmission rings 12 are driven by a transmission belt 13.

[0046] The amplitude detection unit 4 is located on the turntable 9.

[0047] The drive wheel 14 can be driven by a motor to drive the transmission belt 13 and several transmission rings 12 to rotate synchronously. Since the transmission rings 12 and the threaded rod 10 are connected by a groove 11 and a protrusion, the threaded rod 10 can be driven to rotate on the turntable 9. The threaded connection between the threaded rod 10 and the turntable 9 allows the threaded rod 10 to move on the turntable 9 along the axis of the base ring 1. The synchronous movement of several threaded rods 10 pushes the base ring 1 to move along its own axis, which facilitates the adjustment of the impact position of the impact column 2 on the chuck 29 along the axis of the base ring 1. When the threaded rod 10 moves on the turntable 9, the protrusion slides in the groove 11, and the transmission rings 12 move relative to the threaded rod 10.

[0048] The amplitude detection unit 4 and the impact column 2 are located on the same side of the axis of the base ring 1. The movable seat 5 and the resistance plate 6 on the amplitude detection unit 4 are both set on the turntable 9. The movable seat 5 and the turntable 9 are connected by a spring 8.

[0049] Furthermore, a vibrating wheel 15 is rotatably mounted on the base ring 1. The vibrating wheel 15 is rotatably connected to the impact column 2 via an eccentrically mounted connecting rod 16. A vibrating motor 17 is mounted on the turntable 9. A transmission disc is mounted on the output end of the vibrating motor 17. The transmission disc is connected to the end face of the vibrating wheel 15 via several telescopic rods 18.

[0050] One end of the connecting rod 16 is eccentrically mounted on one end face of the vibrating wheel 15, and the other end of the connecting rod 16 is rotatably connected to the impact column 2. The vibrating motor 17 can provide rotational power to the vibrating wheel 15 through the transmission disc and several telescopic rods 18, thereby driving the impact column 2 to reciprocate through the connecting rod 16. Since the base ring 1 can move along its own axis, the telescopic rods 18 can extend and retract, and the several telescopic rods 18 can always transmit power to the transmission disc and the vibrating wheel 15.

[0051] Furthermore, an adjusting slider 19 is provided on the impact column 2, and the position of the adjusting slider 19 on the impact column 2 along the direction of movement of the impact column 2 can be adjusted. The end of the connecting rod 16 is rotatably mounted on the adjusting slider 19.

[0052] The adjusting slider 19 is slidably mounted on the impact column 2, and the sliding direction of the adjusting slider 19 is consistent with the movement direction of the impact column 2. At the same time, the adjusting slider 19 can be fixedly connected to the impact column 2 by fasteners such as bolts and set screws. The end of the connecting rod 16 is connected to the impact column 2 through the adjusting slider 19. When the adjusting slider 19 is in a certain position on the impact column 2, the reciprocating motion range of the impact column 2 changes, and the compression of the elastic pad 3 changes. When the movement range of the impact column 2 is close to the chuck 29, the compression of the elastic pad 3 increases at the position where the impact column 2 and the chuck 29 are closest. At this time, the impact force of the impact column 2 on the chuck 29 increases. When the movement range of the impact column 2 is far away from the chuck 29, the compression of the elastic pad 3 decreases, and the impact force of the impact column 2 on the chuck 29 decreases. This adjusts the vibration amplitude and detection accuracy of the chuck 29.

[0053] Furthermore, the detection device also includes a base column 20, on which a turntable 9 is rotatably mounted. A handle 21 and a main motor 22 are provided on the base column 20. The main motor 22 provides rotational power to the turntable 9 through a transmission wheel 23.

[0054] The base column 20 is provided with a clamping structure in the middle for fastening connection with the external spindle 30.

[0055] The base column 20 provides support for the base ring 1 and the turntable 9. The handle 21 facilitates the operation and handling of the testing device by workers. The transmission wheel 23 is installed on the output end of the main motor 22 and is connected to the turntable 9. Thus, the main motor 22 and the transmission wheel 23 drive the turntable 9 to rotate. The turntable 9 then drives the base ring 1 and the impact column 2 to perform circumferential motion through several threaded rods 10.

[0056] Furthermore, the clamping structure includes a horizontal cylinder 24, one end of which is installed in the middle of the base column 20, and the other end of which is inserted into the outer main shaft 30. A side push column 25 is provided inside the horizontal cylinder 24. One end of the side push column 25 is provided with a threaded rod 26, and the threaded rod 26 is threadedly connected to the horizontal cylinder 24. The other end of the side push column 25 is tapered, and several top blocks 27 are slidably provided on the tapered surface. The top blocks 27 slide through the horizontal cylinder 24 in the radial or inclined direction. The several top blocks 27 press against the inner wall of the main shaft 30. The top blocks 27 are provided with spring pieces 28 for providing them with a force in the axial direction of the horizontal cylinder 24.

[0057] The end of the horizontal cylinder 24 passes through the chuck 29 and is inserted into the main shaft 30. The side push column 25 can slide inside the horizontal cylinder 24. When the threaded rod 26 is rotated, the threaded rod 26 can move along the axis of the horizontal cylinder 24. The threaded rod 26 pushes the side push column 25 to move synchronously. The side push column 25 pushes several top blocks 27 to move outward synchronously through its upper conical surface. The several top blocks 27 simultaneously press and fix the inner wall of the main shaft 30, thereby fixing the main shaft 30 and the base column 20 relative to each other. The vibration of the chuck 29 can be transmitted through the chuck 29. The vibration is transmitted through the main shaft 30 to the base column 20, turntable 9, and amplitude detection unit 4, thereby realizing the detection of chuck 29 with the axis of the main shaft 30 as the reference axis; the spring plate 28 can provide elastic force to the top block 27, so that the top block 27 and the conical surface of the side push column 25 always abut against each other. When the side push column 25 moves in the opposite direction, the spring plate 28 can push the top block 27 to slide into the horizontal cylinder 24; when the clamping structure is fastened to the main shaft 30, the horizontal cylinder 24 and the threaded rod 26 can be locked by bolts or other structures.

[0058] The above are merely preferred embodiments of the present invention. It should be noted that those skilled in the art can make several improvements and modifications without departing from the technical principles of the present invention, and these improvements and modifications should also be considered within the scope of protection of the present invention.

Claims

1. A device for detecting the balance of a CNC machine tool chuck assembly, characterized in that, The device includes an amplitude detection unit and a base ring coaxially arranged with an external spindle. The base ring is sleeved on the outside of a chuck mounted on the external spindle and can rotate on the chuck. On the vertical plane of the base ring axis, the base ring is fixedly arranged relative to the spindle. An impact column that reciprocates along the radial direction of the base ring is provided on the base ring, and an elastic pad is provided at the end of the impact column facing the chuck. The amplitude detection unit is used to detect the vibration of the chuck and spindle along the direction of movement of the impact column; The amplitude detection unit includes a movable base and a resistive element. The movement direction of the movable base and the length direction of the resistive element are both along the radial direction of the base ring and parallel to the movement direction of the impact column. One end of the resistive element is connected to an external power source. A conductive wheel is rotatably mounted on the movable base. The conductive wheel is rolled on the resistive element and is connected to an external power source. A spring is provided on the movable base to provide elastic force to the movable base. The detection device further includes a turntable coaxially arranged with the base ring. A plurality of threaded rods are arranged in a ring on the turntable. The ends of the threaded rods pass through the turntable and are rotatably connected to the base ring. The threaded rods are threadedly connected to the turntable. A plurality of sliding grooves are formed on the threaded rods along their own axial direction. A transmission ring is sleeved on the outer side of the threaded rods. The transmission ring is rotatably arranged on the turntable. A plurality of protrusions that cooperate with the sliding grooves are provided on the inner wall of the transmission ring. A drive wheel is provided on the turntable. The drive wheel and the plurality of transmission rings are driven by a transmission belt. The amplitude detection unit is located on the turntable.

2. The CNC machine tool chuck assembly balance testing device according to claim 1, characterized in that, The base ring is movable along its own axis.

3. The CNC machine tool chuck assembly balance testing device according to claim 1, characterized in that, A vibrating wheel is rotatably mounted on the base ring. The vibrating wheel and the impact column are rotatably connected by an eccentrically mounted connecting rod. A vibrating motor is mounted on the turntable. A transmission disc is mounted on the output end of the vibrating motor. The transmission disc and the end face of the vibrating wheel are connected by several telescopic rods.

4. The CNC machine tool chuck assembly balance testing device according to claim 3, characterized in that, An adjusting slider is provided on the impact column, and the position of the adjusting slider on the impact column along the direction of movement of the impact column is adjustable. The end of the connecting rod is rotatably mounted on the adjusting slider.

5. The CNC machine tool chuck assembly balance testing device according to claim 1, characterized in that, The detection device also includes a base column, the turntable is rotatably mounted on the base column, the base column is provided with a handle and a main motor, and the main motor provides rotational power to the turntable through a transmission wheel; The base column is provided with a clamping structure in the middle for fastening connection with the external spindle.

6. The CNC machine tool chuck assembly balance testing device according to claim 5, characterized in that, The clamping structure includes a horizontal cylinder, one end of which is installed in the middle of the base column, and the other end of which is inserted into the external main shaft. A side push column is provided inside the horizontal cylinder. One end of the side push column is provided with a threaded rod, which is threadedly connected to the horizontal cylinder. The other end of the side push column is tapered, and several top blocks are slidably provided on the tapered surface. The top blocks slide through the horizontal cylinder in the radial or inclined direction. The top blocks press against the inner wall of the main shaft. The top blocks are provided with springs to provide a force toward the axis of the horizontal cylinder.

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