A fully automatic crankshaft dynamic balancing machine

Abstract

The present invention proposes a fully automatic crankshaft dynamic balancing machine, which relates to the technical field of balance measurement. It includes a detection platform, on which is provided a detection component for detecting the dynamic balance of the crankshaft, and also includes two racks and a driving mechanism arranged in pairs. The detection platform is provided with a driving assembly for driving the two racks to move relative to each other; both racks are provided with a lifting mechanism for lifting the crankshaft journal; the driving mechanism is arranged on one of the racks, and the rack is provided with a transmission mechanism that is transmission-connected to the lifting mechanism and the driving mechanism. After the driving mechanism is transmission-connected to the lifting mechanism, it is used to locate the rotation center of the crankshaft; the above structure does not restrict the axial and radial movement of the crankshaft, which is conducive to accurately measuring the dynamic balance of the crankshaft; it also does not require repeated centering of the crankshaft, simplifying the process of fixing and centering the crankshaft, thus eliminating the need for multiple movement and disassembly of the crankshaft, and avoiding the installation error affecting the efficiency of the crankshaft dynamic balance detection.

Description

Technical Field

[0001] The present invention relates to the technical field of balance measurement, in particular to a full-automatic crankshaft dynamic balancing machine. Background Art

[0002] The crankshaft is an important component of the engine, generally composed of the main journal, connecting rod journal, crank, balance block, etc. The balance block is used to balance the centrifugal force and centrifugal torque of the crankshaft. Its material is made of carbon structural steel or ductile iron. After casting, CNC lathes, CNC internal milling machines, CNC turning and broaching machines and other advanced equipment are widely used to process the main journal and connecting rod journal to reduce the deformation of the crankshaft processing; then the crankshaft is subjected to dynamic balancing test, and finally the main journal and connecting rod journal are finely ground and finally the surface is strengthened.

[0003] Current crankshafts need to be dynamically balanced during production and after long-term use. The crankshaft is tested using a dynamic balancing machine. If the crankshaft is unbalanced, it is necessary to remove weight by turning holes in the crankshaft or add balancing blocks to achieve weight balance.

[0004] However, if the crankshaft is removed from the dynamic balancing machine and then drilled, it is necessary to remove the limit on the crankshaft before drilling, and then fix the crankshaft after drilling. Dynamic balancing requires more than ten tests and repeated centering. Such reciprocating operations will affect the efficiency of the test when moving and disassembling the crankshaft. In addition, traditional dynamic balancing test instruments directly and rigidly fix the crankshaft, and the axial and radial movements of the crankshaft are restricted. Part of the centrifugal force generated by the crankshaft is absorbed by the instrument frame, making the measurement data inaccurate. Summary of the Invention

[0005] The object of the present invention is to provide a fully automatic crankshaft dynamic balancing machine, which can solve the problems raised by the above-mentioned background technology in view of the shortcomings of the existing technology.

[0006] The technical solution of this application is implemented as follows:

[0007] The present application provides a fully automatic crankshaft dynamic balancing machine, comprising a detection platform, on which is provided a detection component for detecting the dynamic balance of the crankshaft, and also comprising two frames arranged in pairs and a driving mechanism, wherein a driving assembly for driving the two frames to move relative to each other is provided in the detection platform; both frames are provided with a lifting mechanism for lifting the crankshaft journal; the driving mechanism is arranged on one of the frames, and a transmission mechanism is provided on the frame that is transmission-connected to the lifting mechanism and the driving mechanism, and the driving mechanism is used to locate the rotation center of the crankshaft after being transmission-connected to the lifting mechanism.

[0008] In some technical solutions of the present invention, the lifting mechanism includes a lifting plate and a mounting base, and a lifting roller is provided in the lifting area of ​​the lifting plate, which is rotated in the same direction as the rotation direction of the crankshaft; the mounting base is installed on the side wall of the frame, and the mounting base slides in the vertical direction and is provided with a guide frame connected to the lifting plate, and the guide frame is provided with a limit spring connected to the mounting base.

[0009] In some technical solutions of the present invention, the driving mechanism is symmetrically arranged and rotatably arranged on two swing frames on the frame, and driving rollers are rotatably provided on the free ends of the two swing frames, and the crankshaft journal is placed in the clamping area formed by the two driving rollers and the lifting plate.

[0010] In some technical solutions of the present invention, the transmission mechanism includes a displacement pusher, a slideway is left between the mounting base and the frame, the displacement pusher is slidably arranged in the slideway along the vertical direction and is connected to the guide frame, two guide sleeves are provided on the side wall of the frame with the displacement pusher as the symmetry axis, a guide body is slidably provided in the guide sleeve, a push rod is provided at one end of the guide body close to the mounting base, the push rod extends outward and abuts against the displacement pusher; a return spring is provided on the push rod to abut against the inner wall of the guide sleeve, a rack is provided on the end of the guide body away from the mounting base, a mounting groove is provided on the outer wall of the guide sleeve, a gear engaged with the rack is rotatably provided in the mounting groove, and the swing frame is connected to the gear.

[0011] In some technical solutions of the present invention, the displacement pusher is an isosceles trapezoid, the lower bottom edge of the displacement pusher is connected to the guide frame, and the free end of the push rod is provided with an inclined surface that contacts the inclined edge of the displacement pusher.

[0012] In some technical solutions of the present invention, an unlocking component for releasing the ejector rod from contact with the displacement pusher is provided in the guide sleeve.

[0013] In some technical solutions of the present invention, a spiral limit groove is provided on the outer circumferential wall of the guide body, and a limit block embedded in the limit groove is provided on the inner wall of the guide sleeve; a plurality of locking grooves are provided on the bevel surface of the displacement pusher along its extension direction; when the swing frame rotates in the installation groove due to the centrifugal force generated by the rotation of the crankshaft, the gear will force the rack to reciprocate in the guide sleeve. At this time, the guide body rotates in the guide sleeve under the joint restriction of the limit block and the limit groove. After the push rod rotates a certain angle relative to the displacement pusher under the guidance of the guide body, the bevel on the free end of the push rod disengages from the bevel surface of the displacement pusher, and then the free end of the push rod is partially embedded in the locking groove.

[0014] In some technical solutions of the present invention, a connecting rod is connected to the side of the guide frame facing away from the lifting plate, a limit frame is rotatably provided on the side wall of the frame, the connecting rod is hinged to the limit frame, a limit plate is provided at the free end of the limit frame, and a plurality of limit rollers parallel to the rotation direction of the crankshaft are rotatably provided in the limit area of ​​the limit plate.

[0015] In some technical solutions of the present invention, a lifting mechanism is provided on the frame, and a lifting end of the lifting mechanism abuts against the bottom of the guide frame in a lifting state.

[0016] In some technical solutions of the present invention, a drilling mechanism for drilling holes in the crankshaft is provided on the detection platform.

[0017] Compared with the prior art, the embodiments of the present invention have at least the following advantages or beneficial effects:

[0018] The above structure does not restrict the axial and radial movement of the crankshaft, thereby preventing a portion of the centrifugal force generated by the crankshaft from being absorbed by the instrument frame, resulting in inaccurate measurement, which is conducive to accurate measurement of the dynamic balance of the crankshaft; there is no need to repeatedly center the crankshaft, simplifying the crankshaft fixing and centering process, so that there is no need to move and disassemble the crankshaft multiple times, avoiding installation errors affecting the efficiency of crankshaft dynamic balance detection. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following briefly introduces the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0020] Figure 1 It is a schematic diagram of the working state structure of the present invention;

[0021] Figure 2 Schematic diagram of the combined structure of the lifting mechanism and the driving mechanism in the present invention;

[0022] Figure 3 Schematic diagram of the combination of the driving mechanism and the transmission mechanism in the present invention;

[0023] Figure 4 Schematic diagram of the cross-sectional structure of the transmission mechanism of the present invention;

[0024] Figure 5 Schematic diagram of the internal structure of the transmission mechanism of the present invention;

[0025] Figure 6 It is a schematic diagram of the deformed cross-sectional structure of the transmission mechanism in the present invention.

[0026] Icons: 1. Detection platform; 2. Frame; 3. Drilling mechanism; 4. Crankshaft; 5. Guide sleeve; 6. Swing frame; 7. Mounting base; 8. Driving roller; 9. Driving motor; 10. Guide frame; 11. Connecting rod; 12. Limiting frame; 13. Lifting plate; 14. Limiting roller; 15. Lifting roller; 16. Push rod; 17. Inclined surface; 18. Limiting block; 19. Displacement pusher; 20. Gear; 21. Rack; 22. Guide body; 23. Reset spring; 24. Limiting groove; 25. Locking groove; 26. Lifting mechanism; 27. Limiting spring; 28. Vibration sensor; 29. ​​Displacement sensor. DETAILED DESCRIPTION

[0027] To make the objectives, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions of the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of 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. Generally, the components of the embodiments of the present invention described and shown in the drawings herein can be arranged and designed in various different configurations.

[0028] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention as claimed, but rather merely represents selected embodiments of the present invention. All other embodiments derived by persons of ordinary skill in the art based on the embodiments of the present invention without creative effort are also within the scope of protection of the present invention.

[0029] Example 1

[0030] Please refer to Figures 1-6 shown.

[0031] This application provides a fully automatic crankshaft 4 dynamic balancing machine, such as Figure 1 、 Figure 2 、 Figure 3 as well as Figure 4 As shown, the present application provides a fully automatic crankshaft 4 dynamic balancing machine, including a detection platform 1, which is composed of a base and an operating platform. The detection component for detecting the dynamic balance of the crankshaft 4 is installed in the operating platform. The detection component adopts the existing technology. The base provides an installation area for the two frames 2 to ensure the stability of the frames 2 during testing. The two frames 2 can move towards or away from each other on the base through a driving component provided on the base, and the reciprocating screw mechanism can play a role in self-locking ability that can be adjusted at any time, thereby forcing the device to adapt to engine crankshafts 4 of different displacements, thereby increasing the practicality of the device; two sets of lifting mechanisms for lifting the crankshaft 4 journal are respectively installed on the two side walls facing the frame 2; and the lifting center lines of the two lifting mechanisms are located on the same horizontal line;

[0032] Among them, the specific structure of the lifting mechanism includes an arc-shaped lifting plate 13 and an L-shaped mounting base 7. A lifting roller 15 is rotatably provided in the lifting area of ​​the lifting plate 13 in the same direction as the rotation direction of the crankshaft 4. The number of the lifting roller 15 is at least 1. At this time, the lifting roller 15 is rotatably mounted on the lowest point of the inner arc surface of the lifting plate 13 by a pin shaft; when the number of the lifting rollers 15 is 2 or more, they are equidistantly arranged on the inner arc surface of the lifting plate 13 along the circumference of the garden where the lifting plate 13 is located; the mounting base 7 is mounted on the frame by bolts. 2, a wedge-shaped through groove is opened in the vertical direction on the side wall of the mounting base 7. The lifting plate 13 is connected to the guide frame 10 by bolts and then slidably set in the through groove. The guide frame 10 is adapted to the through groove to ensure the stability of the guide frame 10 on the mounting base 7 during operation. A limit spring 27 connected to the mounting base 7 is sleeved on the guide frame 10 to provide a buffer force for the lifting plate 13 supporting the crankshaft 4, avoiding hard contact between the lifting plate 13 and the mounting base 7, which causes vibration of the crankshaft 4 and affects the subsequent centering operation.

[0033] Among them, the specific structure of the driving mechanism includes two swing frames 6 that are symmetrically arranged and rotatably arranged on the side walls of the frame 2 through pin shafts, and a driving roller 8 is rotatably provided on the free ends of the two swing frames 6, and a driving motor 9 that is transmission-connected to the driving roller 8 is installed on the swing frame 6 through bolts; and the crankshaft 4 journal is placed in the clamping area formed by the two driving rollers 8 and the lifting plate 13 to position the rotation center of the crankshaft 4.

[0034] Among them, the specific structure of the transmission mechanism includes a displacement pusher 19, which is an isosceles trapezoid. A slide is left between the mounting base 7 and the frame 2. The displacement pusher 19 is slidably arranged in the slide along the vertical direction, and the lower bottom edge of the displacement pusher 19 is connected to the guide frame 10; two guide sleeves 5 are provided on the side wall of the frame 2 with the displacement pusher 19 as the symmetry axis. The guide sleeve 5 is fixedly connected to the side wall of the frame 2 by bolts, and both ends of the guide sleeve 5 are closed; and the axes of the two guide sleeves 5 are coaxial; a guide body 22 is slidably provided in the guide sleeve 5, and the outer diameter of the guide body 22 is the same as the inner diameter of the guide sleeve 5 Adaptation; a push rod 16 is provided at one end of the guide body 22 close to the mounting base 7, and the push rod 16 and the guide body 22 are integrally formed by machining; the push rod 16 extends outward through the guide sleeve 5 and abuts against the displacement pusher 19, and a slope 17 is provided on the free end of the push rod 16 for contacting the hypotenuse surface of the displacement pusher 19; a return spring 23 is sleeved on the push rod 16 and abuts against the inner wall of the guide sleeve 5, and a rack 21 is provided at the end of the guide body 22 facing away from the mounting base 7, and a mounting groove is provided on the outer wall of the guide sleeve 5, and a gear 20 engaged with the rack 21 is provided in the mounting groove through a pin shaft, and the swing frame 6 is connected to the gear 20.

[0035] Furthermore, the inclined surface 17 and the inclined edge surface of the displacement pushing member 19 are parallel to and opposite to each other.

[0036] The working principle is: in the initial state, the lifting plate 13 in the lifting mechanism is not subjected to the downward pressure generated by the gravity of the crankshaft 4; at this time, the displacement adjustment part does not apply thrust to the push rod 16, and the swing frame 6 is now under the joint restriction of the gear 20, rack 21, return spring 23, guide body and push rod 16. The return spring 23 is in an extended state, and the opening and closing angle of the swing frame 6 on the frame 2 reaches the maximum value. At this time, the distance between the two swing frames 6 is the largest, and an entry and exit channel for the crankshaft 4 journal end to enter and exit the lifting mechanism is reserved between the driving rollers 8 on the two swing frames 6; when the crankshaft 4 is placed on the lifting plate 13 in the two lifting mechanisms after the relative distance is adjusted by the robotic arm; the lifting plate 13 is subjected to the downward pressure generated by the gravity of the crankshaft 4 At this time, the lifting plate 13 will drive the displacement pusher 19 connected to the guide frame 10 to move downward in the slideway formed between the mounting base 7 and the frame 2 in the vertical direction; at this time, the hypotenuse of the displacement pusher 19 gradually applies a thrust to the push rod 16, and the push rod 16 at this time retreats into the guide sleeve 5, and the return spring 23 is in a compressed state; at this time, the swing frame 6 is jointly restricted by the gear 20, the rack 21, the return spring 23, the guide body and the push rod 16, and the opening and closing angle of the swing frame 6 on the frame 2 will gradually decrease; the crankshaft 4 journal located in the clamping area formed by the two driving rollers 8 and the lifting plate 13 can be clamped and limited, and the crankshaft 4 is driven to rotate in this area by the driving roller 8, and the rotation center of the crankshaft 4 is self-positioned at the same time.

[0037] The above structure will not restrict the axial and radial movement of the crankshaft 4, thereby avoiding a part of the centrifugal force generated by the crankshaft 4 being absorbed by the instrument frame 2, resulting in inaccurate measurement, which is conducive to accurate measurement of the dynamic balance of the crankshaft 4; there is no need to repeatedly center the crankshaft 4, which simplifies the fixing and centering process of the crankshaft 4. In this way, there is no need to move and disassemble the crankshaft 4 multiple times, avoiding the installation error affecting the efficiency of the drive dynamic balance detection.

[0038] Preferably, the detection components include photoelectric sensors mounted on both sides of the frame 2 to measure the eccentric angle of the crankshaft 4; multiple vibration sensors 28 mounted on the inner sidewall of the lifting plate 13 to measure the centrifugal vibration force of the crankshaft 4 during rotation; and a displacement sensor 29 mounted on the rack 21 to measure the deflection distance of the crankshaft 4 due to eccentric movement within the drive mechanism and lifting mechanism 26. This data is then compared with the system's detection data to achieve calibration. This multi-faceted detection method improves the dynamic balance detection capability of the crankshaft 4.

[0039] Preferably, the drive assembly is a reciprocating screw mechanism, which is a prior art and consists of a screw and a nut that matches the screw thread. The screw drives the nut to move along the screw axis through the action of external force, thereby realizing the reciprocating linear motion of the mechanism. The principle of the reciprocating screw mechanism is based on the principle of dynamic and static friction conversion of the thread pair. When there is a certain amount of front-to-back friction between the screw and the nut, by rotating the screw, the friction of the thread pair will cause the nut to move along the screw axis. The advantages of the reciprocating screw mechanism are simple structure, easy manufacturing and installation. At the same time, due to the geometric shape of the thread pair, the reciprocating screw mechanism has a high transmission efficiency, can withstand a certain load, and has a self-locking characteristic, and can remain stationary in the absence of external force.

[0040] Example 2

[0041] Please refer to Figures 1-6 shown.

[0042] In some technical solutions of the present invention, an unlocking component for releasing the ejector rod 16 from contact with the displacement pusher 19 is provided in the guide sleeve 5 .

[0043] A spiral limiting groove 24 is provided on the outer circumferential wall of the guide body 22, and a limiting block 18 embedded in the limiting groove 24 is provided on the inner wall of the guide sleeve 5; a plurality of locking grooves 25 are provided on the oblique side surface of the displacement pusher 19 along its extension direction.

[0044] When the crankshaft 4 rotates at high speed driven by the driving roller 8 and generates centrifugal force, the crankshaft 4 will make eccentric motion between the driving roller 8 and the lifting plate due to its unstable dynamic balance. At this time, the swing frame 6 will be subjected to the reverse thrust generated by the crankshaft 4, and the swing frame 6 will swing to a certain extent on the frame 2. The gear 20 will rotate in the mounting groove because it is connected to the swing frame 6. The gear 20 will force the rack 21 to move away from the displacement pusher 19 in the guide sleeve 5. At this time, the guide body 22 is jointly restricted by the limit block 18 and the limit groove 24 and rotates in the guide sleeve 5. The corresponding push rod 16 also makes a circular motion with the guide body 22. At this time, the push rod 16 is in the above structure. Also, a plurality of locking grooves 25 are provided on the hypotenuse surface of the displacement pusher 19 along its extension direction, and a plurality of locking grooves 25 are provided on the left side of the displacement pusher 19 relative to the ejector rod 16; when the ejector rod 16 rotates counterclockwise under the guidance of the guide body 22, the inclined surface 17 on the ejector rod 16 changes from a position relationship parallel to and relative to the hypotenuse of the displacement pusher 19 to a position relationship perpendicular to each other, and the ejector rod 16 will not be subject to the thrust applied to it by the displacement pusher 19 at this time, and the inclined surface 17 on the free end of the ejector rod 16 will be partially embedded in the locking groove 25, and the depth of the locking groove 25 is greater than the movement length of the ejector rod 16.

[0045] Since the swing frame 6 in the drive mechanism is not subject to the force exerted on it by the displacement pusher 19, the swing frame is now restrained by the gear 20, rack 21, return spring 23, and the guide body and push rod 16. The return spring 23 is in an extended state, and the opening and closing angle of the swing frame on the frame 2 reaches its maximum. At this time, the distance between the two swing frames is at its maximum. The crankshaft 4 is no longer restrained and the crankshaft 4 located on the lifting plate 13 will stop rotating, and the drilling operation for dynamic balancing will then be carried out. This prevents the crankshaft 4 from directly contacting the measuring equipment or other electronic equipment during the dynamic balancing process, which may affect the accuracy of the above-mentioned equipment when measuring the crankshaft 4.

[0046] Example 3

[0047] Please refer to Figures 1-6 shown.

[0048] In some technical solutions of the present invention, a connecting rod 11 intersects the side of the guide frame 10 facing away from the lifting plate 13. A limiting frame 12 is rotatably mounted on the side wall of the frame 2. The connecting rod 11 is hingedly connected to the limiting frame 12. A limiting plate is mounted at the free end of the limiting frame 12. Within the limiting region of the limiting plate, a plurality of limiting rollers 14 are rotatably mounted, parallel to the rotation direction of the crankshaft 4. The limiting plate and limiting frame 12 are integrally formed; the limiting plate is V-shaped, and the clamp between the two vertical sections forms an obtuse angle.

[0049] The above design can prevent the rotation center of the crankshaft 4 from deviating when the driving mechanism releases the clamping force on the crankshaft 4. The crankshaft 4 can continue to be fixed, avoiding misoperation in subsequent dynamic balancing operations.

[0050] In some technical solutions of the present invention, a lifting mechanism 26 is provided on the frame 2 , and a lifting end of the lifting mechanism 26 abuts against the bottom of the guide frame 10 in the lifting state.

[0051] The lifting mechanism 26 is specifically an electric push rod. There are two sets of electric push rods. The two sets of electric push rods move synchronously to lift the guide frame 10 in the vertical direction along the through slots provided on the mounting base 7. In addition, due to the restriction of the limit frame 12 by the connecting rod, when the guide frame 10 moves upward in the vertical direction, the connecting rod 11 will drive the limit frame 12 to move synchronously with the guide frame 10, continuously clamping the journal of the crankshaft 4. Conversely, when the electric push rod does not apply thrust to the guide frame 10, the downward pressure applied by the crankshaft 4 on the guide frame 10 will cause the connecting rod 11 to pull the limit frame 12 downward, also continuously providing clamping and limiting for the journal of the crankshaft 4. This prevents direct contact between the crankshaft 4 and the measuring equipment or other electronic equipment when the crankshaft 4 is drilled for dynamic balancing, which may affect the accuracy of the above-mentioned equipment when measuring the crankshaft 4.

[0052] Example 4

[0053] Please refer to Figures 1-6 shown.

[0054] In some technical solutions of the present invention, a drilling mechanism 3 for drilling a hole in the crankshaft 4 is provided on the inspection platform 1. The drilling mechanism 3 is also slidably mounted on the inspection platform 1 via a slide rail and a reciprocating screw mechanism, and can perform drilling operations at different positions of the crankshaft 4 to ensure that the dynamic balance of the crankshaft 4 meets the requirements.

[0055] The above are merely preferred embodiments of the present invention and are not intended to limit the present invention. Those skilled in the art will readily appreciate that various modifications and variations of the present invention are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present invention shall be included within the scope of protection of the present invention.

Claims

1. A fully automatic crankshaft dynamic balancing machine, comprising a detection platform, on which is provided a detection component for detecting the dynamic balance of the crankshaft, characterized in that: The detection platform further comprises two racks and a driving mechanism arranged in pairs, wherein a driving assembly is provided in the detection platform for driving the two racks to move relative to each other; each of the two racks is provided with a lifting mechanism for lifting the crankshaft journal; the driving mechanism is arranged on one of the racks, and the rack is provided with a transmission mechanism connected to the lifting mechanism and the driving mechanism, and the driving mechanism is connected to the lifting mechanism to locate the rotation center of the crankshaft; The lifting mechanism includes a lifting plate and a mounting base, wherein a lifting roller is rotatably provided in the lifting area of ​​the lifting plate and is in the same direction as the rotation direction of the crankshaft; the mounting base is mounted on the side wall of the frame, and the mounting base is provided with a guide frame connected to the lifting plate for sliding in the vertical direction, and a limit spring connected to the mounting base is sleeved on the guide frame; The driving mechanism comprises two swing frames symmetrically arranged and rotatably mounted on the frame, the free ends of the two swing frames being rotatably provided with driving rollers, and the crankshaft journal being placed in a clamping area formed by the two driving rollers and the lifting plate; Material toggling mechanism, its both sides respectively have a cylinder pressure, and the cylinder pressure bar connects swing arm, and the swing arm end face has hook portion, and a bar passes position between the end of two swing arms and the hook portion. The swing arm is connected to the swing arm by a threaded connection. The swing arm is connected to the swing arm by a threaded connection.

2. A fully automatic crankshaft dynamic balancing machine according to claim 1, characterized in that: The displacement pusher is in the shape of an isosceles trapezoid, the lower bottom edge of the displacement pusher is connected to the guide frame, and the free end of the push rod is provided with an inclined surface that contacts the inclined edge of the displacement pusher.

3. A fully automatic crankshaft dynamic balancing machine according to claim 1 or 2, characterized in that: An unlocking component for releasing the ejector rod from contact with the displacement pusher is provided in the guide sleeve.

4. A fully automatic crankshaft dynamic balancing machine according to claim 3, characterized in that: A spiral limiting groove is provided on the outer circumferential wall of the guide body, and a limiting block embedded in the limiting groove is provided on the inner wall of the guide sleeve; a plurality of locking grooves are provided on the hypotenuse surface of the displacement pusher along its extension direction; when the swing frame rotates in the mounting groove due to the centrifugal force generated by the rotation of the crankshaft, the gear will force the rack to reciprocate in the guide sleeve. At this time, the guide body rotates in the guide sleeve under the joint restriction of the limiting block and the limiting groove. After the push rod rotates a certain angle relative to the displacement pusher under the guidance of the guide body, the inclined surface on the free end of the push rod is disengaged from the hypotenuse surface of the displacement pusher, and then the free end of the push rod is partially embedded in the locking groove.

5. The fully automatic crankshaft dynamic balancing machine according to claim 1, characterized in that: The guide frame is connected with a connecting rod on the side away from the lifting plate, and a limit frame is rotatably provided on the side wall of the frame. The connecting rod is hinged to the limit frame, and a limit plate is provided at the free end of the limit frame. A plurality of limit rollers parallel to the rotation direction of the crankshaft are rotatably provided in the limit area of ​​the limit plate.

6. The fully automatic crankshaft dynamic balancing machine according to claim 4, characterized in that: The frame is provided with a lifting mechanism, and the lifting end of the lifting mechanism abuts against the bottom of the guide frame in a lifting state.

7. The fully automatic crankshaft dynamic balancing machine according to claim 1, characterized in that: The detection platform is provided with a drilling mechanism for drilling holes in the crankshaft.

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