Error-proof mechanism for crankshaft spline machining and crankshaft machining system

Abstract

The utility model discloses a crankshaft spline processing mistake-proofing mechanism and a crankshaft processing system.The crankshaft spline processing mistake-proofing mechanism comprises a mistake-proofing positioning disc which is provided with a positioning cavity and a mounting cavity perpendicular to the positioning cavity, and the positioning cavity is used for positioning and mounting a crankshaft; the elastic assembly is arranged in the mounting cavity, the movable end of the elastic assembly extends into the positioning cavity, and the elastic assembly can move in the radial direction of the mistake-proof positioning disc; when the conical end main journal of the crankshaft moves to enter the positioning cavity, the moving end of the elastic assembly retracts in the radial direction of the mistake-proofing positioning disc under the action of the conical end main journal, so that the conical end main journal is inserted into the positioning cavity. When the spline end main journal of the crankshaft moves to be inserted into the positioning cavity, the movable end of the elastic assembly is clamped to the spline end main journal so as to limit the spline end main journal from being inserted into the positioning cavity. According to the crankshaft spline machining mistake-proofing mechanism, the problem that the installation direction of a crankshaft is wrong due to human negligence can be avoided, human errors are avoided, and therefore it is guaranteed that the crankshaft is correctly clamped, and orderly production is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of crankshaft processing equipment, and more specifically, to a crankshaft spline processing error prevention mechanism. In addition, the utility model also relates to a crankshaft processing system including the crankshaft spline processing error prevention mechanism. Background Art

[0002] Spline is a kind of mechanical transmission, used to transmit mechanical torque, plays a vital role in the machinery industry, and is usually used in aircraft, automobiles, motorcycles, machine tool manufacturing, agricultural machinery and general mechanical transmission devices.

[0003] In the field of crankshaft processing, when the splines on the crankshaft are slotted, one end of the machine tool fixes the main journal of the spline end of the crankshaft, and the other end of the machine tool uses a center point to tighten the center hole of the main journal of the cone end. However, in the actual processing process, due to the similar dimensions of the two ends of the crankshaft, the operator is likely to install it upside down, resulting in tool collision accidents, resulting in the scrapping of parts and tools, and even damage to equipment, affecting production progress.

[0004] In summary, how to avoid the problem of crankshaft being installed upside down during spline machining is an urgent problem to be solved by those skilled in the art. Utility Model Content

[0005] In view of this, the purpose of the utility model is to provide a crankshaft spline processing error-proof mechanism, which can avoid the problem of crankshaft installation direction errors caused by human negligence, and effectively avoid human errors without increasing the burden on operators and affecting production efficiency, thereby ensuring the correct clamping of the crankshaft and ensuring orderly production.

[0006] Another object of the utility model is to provide a crankshaft machining system including the crankshaft spline machining error prevention mechanism.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A crankshaft spline machining error prevention mechanism, comprising:

[0009] The error-proof positioning plate has a positioning chamber and an installation chamber vertically arranged therewith, wherein the positioning chamber is used for positioning and installing the crankshaft;

[0010] An elastic component is disposed in the installation chamber and its movable end extends into the positioning chamber, and the elastic component can move along the radial direction of the anti-error positioning disk;

[0011] When the cone-end main journal of the crankshaft moves to enter the positioning chamber, the moving end of the elastic component retracts along the radial direction of the anti-error positioning disk under the action of the cone-end main journal, so that the cone-end main journal is inserted into the positioning chamber;

[0012] When the main journal of the spline end of the crankshaft moves to be inserted into the positioning cavity, the moving end of the elastic component engages with the main journal of the spline end to restrict its insertion into the positioning cavity.

[0013] Preferably, the elastic component comprises:

[0014] A movable pin, one end of which is a connecting portion, and the other end of which is provided with a clamping portion for clamping the main shaft journal at the spline end;

[0015] A movable member, movably disposed in the installation chamber;

[0016] A spring is arranged between the movable pin and the connecting part. When the spline end main journal of the crankshaft is inserted into the installation chamber, the movable part can move away from the axis of the anti-misalignment positioning disk to drive the movable pin to move and release the clamping of the spline end main journal.

[0017] Preferably, the movable part is a screw, and the inner wall of the installation chamber is threadedly connected to the screw.

[0018] Preferably, a displacement monitoring element is provided at the lower end of the clamping portion of the movable pin, and the displacement monitoring element signal is connected to a control element. The displacement monitoring element is used to transmit the movement information of the movable pin to the control element, and the control element signal is connected to an alarm.

[0019] Preferably, a limiting member slidably connected to the inner wall of the installation chamber is provided on the circumference of the movable pin, and when the movable pin moves, the limiting member moves along the radial direction of the anti-mistake positioning disk.

[0020] Preferably, the elastic components are provided in a plurality of groups, and the plurality of groups of the elastic components are arranged around the axial direction of the positioning chamber.

[0021] Preferably, a spring chuck is provided on the lower side of the anti-error positioning disk, and the middle part of the spring chuck has a clamping hole for clamping the cone end main shaft neck, and when the spring chuck is driven to move downward, the clamping hole clamps the cone end main shaft neck to limit its radial movement.

[0022] Preferably, a machine tool movable top is provided in the spring chuck, one end of the machine tool movable top is used to abut against the center hole of the cone end main shaft neck to limit the axial movement of the cone end main shaft neck, and the other end of the machine tool movable top extends out of the spring chuck.

[0023] Preferably, an elastic member is sleeved on the outer periphery of the movable center of the machine tool, one end of the elastic member is connected to the movable center of the machine tool, and the other end of the elastic member is connected to the bottom surface of the inner wall of the spring chuck.

[0024] The utility model also provides a crankshaft processing system, comprising any one of the crankshaft spline processing error prevention mechanisms described above.

[0025] The utility model provides a crankshaft spline processing error-proofing mechanism, comprising an error-proofing positioning disk and an elastic component, wherein the error-proofing positioning disk comprises a positioning chamber and an installation chamber arranged vertically therewith, the positioning chamber is used to install the crankshaft, the installation chamber is used to install the elastic component, and the movable end of the elastic component extends into the positioning chamber; the elastic component can move radially along the anti-error positioning disk, specifically, when the cone-end main shaft neck of the crankshaft moves to enter the positioning chamber (that is, when the crankshaft is installed in the correct direction), the elastic component retracts radially along the anti-error positioning disk under the action of the cone-end main shaft neck, that is, the movable end moves out of the positioning chamber to make room for installation, so that the cone-end main shaft neck is inserted into the positioning chamber to complete its fixation; if the spline end main shaft neck of the crankshaft moves to insert into the positioning chamber (that is, when the crankshaft is installed in the wrong direction), the movable end of the elastic component clamps the spline end main shaft neck to limit the spline end main shaft neck from being inserted into the positioning chamber, so as to avoid processing when the crankshaft is installed in the wrong direction. The above-mentioned crankshaft spline machining error prevention mechanism can avoid the problem of incorrect crankshaft installation direction caused by human negligence. Without increasing the burden on the operator and without affecting production efficiency, it can effectively avoid human errors, thereby ensuring the correct clamping of the crankshaft and ensuring orderly production. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the structure of the crankshaft spline machining error prevention mechanism provided by the utility model;

[0028] Figure 2 It is a schematic diagram of the crankshaft spline machining error prevention mechanism provided by the utility model when the crankshaft is correctly installed;

[0029] Figure 3 It is a schematic diagram of the crankshaft spline machining error prevention mechanism provided by the utility model in the crankshaft installation error state;

[0030] Figure 4 for Figure 3 A partial enlarged view of the middle A area;

[0031] Figure 5 A schematic diagram of the structure of the movable pin provided by the utility model;

[0032] Figure 6 The utility model is a schematic structural diagram of the spring chuck provided by the utility model.

[0033] Figure 1-Figure 6 , the reference numerals include:

[0034] 1-crankshaft; 2-elastic component; 3-anti-error positioning plate; 4-spring chuck; 5-machine tool active center; 6-elastic part;

[0035] 11-spline end main shaft journal; 12-cone end main shaft journal; 21-movable pin; 22-spring; 23-movable part; 211-clamping part; 212-connecting part. DETAILED DESCRIPTION

[0036] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0037] The core of the utility model is to provide a crankshaft spline machining error prevention mechanism, which can avoid the problem of crankshaft installation direction errors caused by human negligence, and effectively avoid human errors without increasing the burden on operators and affecting production efficiency, thereby ensuring the correct clamping of the crankshaft and ensuring orderly production. Another core of the utility model is to provide a crankshaft machining system including the above crankshaft spline machining error prevention mechanism.

[0038] The crankshaft spline machining error prevention mechanism provided by the utility model includes an error prevention positioning plate 3 and an elastic component 2. Please refer to Figure 1-3 .

[0039] The anti-error positioning plate 3 has a positioning chamber and a mounting chamber arranged perpendicularly thereto. The positioning chamber is used to mount the crankshaft 1. The axial direction of the positioning chamber is consistent with the axial direction of the crankshaft 1, while the axial direction of the mounting chamber is perpendicular to the axial direction of the crankshaft 1 (radial direction of the crankshaft 1). The anti-error positioning plate 3 is fixed during the crankshaft spline machining to ensure reliable clamping and fixing of the cone end main journal 12 of the crankshaft 1.

[0040] The elastic component 2 is arranged in the installation chamber and its movable end extends into the positioning chamber. The initial state of the movable end of the elastic component 2 is extending into the positioning chamber. Under the action of external force, the elastic component 2 can move radially along the anti-error positioning disk 3.

[0041] Specifically, when the tapered end main journal 12 of the crankshaft 1 moves to be inserted into the positioning chamber, since the bottom of the tapered end main journal 12 is tapered, when the tapered end main journal 12 is inserted into the positioning chamber, as it moves, the tapered portion can push the telescopic end of the elastic component 2 in the initial state into the installation chamber, so that the elastic component 2 is retracted into the installation chamber, and then, the top of the tapered end main journal 12 smoothly enters the positioning chamber until the crankshaft 1 is pressed against the top of the anti-error positioning plate 3, thereby achieving accurate installation and positioning of the tapered end main journal 12, ensuring that the tapered end main journal 12 is correctly installed, and avoiding damage or scrapping of part tools.

[0042] When the spline end main journal 11 of the crankshaft 1 moves to be inserted into the installation chamber, the spline end main journal 11 is a cylindrical surface. When the cylindrical surface is installed in the chamber, the movable end of the elastic component 2 will not retract into the installation chamber, and the movable end will be clamped on the outside of the cylindrical surface to limit the spline end main journal 11 from continuing to move downward and limit the spline end main journal 11 from being inserted into the positioning chamber to avoid the crankshaft 1 being installed in the wrong direction, so as to achieve the effect of self-error prevention.

[0043] The above-mentioned crankshaft spline processing anti-error mechanism includes an anti-error positioning disk 3 and an elastic component 2, wherein the anti-error positioning disk 3 includes a positioning chamber and an installation chamber arranged vertically therewith, the positioning chamber is used to install the crankshaft, and the installation chamber is used to install the elastic component 2, and the movable end of the elastic component 2 extends into the positioning chamber; the elastic component 2 can move radially along the anti-error positioning disk 3, specifically, when the cone end main journal 12 of the crankshaft 1 moves to enter the positioning chamber (that is, when the crankshaft direction is correctly installed), the elastic component 2 retracts radially along the anti-error positioning disk 3 under the action of the cone end main journal 12, that is, the movable end moves out of the positioning chamber to make room for installation, so that the cone end main journal 12 is inserted into the positioning chamber to complete its fixation; if the spline end main journal 11 of the crankshaft 1 moves to insert into the positioning chamber (that is, when the crankshaft direction is incorrectly installed), the movable end of the elastic component 2 clamps the spline end main journal 11 to limit the spline end main journal 11 from being inserted into the positioning chamber, so as to avoid processing when the crankshaft is installed in the wrong direction. The above-mentioned crankshaft spline machining error prevention mechanism can avoid the problem of incorrect crankshaft installation direction caused by human negligence. Without increasing the burden on the operator and without affecting production efficiency, it can effectively avoid human errors, thereby ensuring the correct clamping of the crankshaft and ensuring orderly production.

[0044] On the basis of the above embodiment, the elastic component 2 includes:

[0045] A movable pin 21, one end of which is a connecting portion 212, and the other end of which is provided with a clamping portion 211 for clamping the main journal 11 at the spline end;

[0046] A movable member 23 is movably disposed in the installation chamber;

[0047] The spring 22 is arranged between the movable pin 21 and the connecting part 212. When the spline end main journal 11 of the crankshaft 1 is inserted into the installation chamber, the movable part 23 can move away from the axis of the anti-misalignment positioning plate 3 to drive the movable pin 21 to move and release the clamping of the spline end main journal 11.

[0048] Please refer to Figures 2 to 5 The elastic component 2 includes a movable pin 21, a movable part 23 and a spring 22, wherein one end of the movable pin 21 is a connecting portion 212 for connecting with the spring 22, and the other end is provided with a clamping portion 211 for clamping the spline end main shaft journal 11.

[0049] The movable member 23 is movably arranged in the installation chamber, and one end of the spring 22 is connected to the connecting portion 212, and the other end is connected to the movable member 23. When the spline end main journal 11 of the crankshaft 1 is inserted into the installation chamber, the spline end main journal 11 is clamped to restrict movement. At this time, in order to carry out normal production operations, the crankshaft 1 needs to be adjusted in direction; then the clamping of the spline end main journal 11 needs to be released. The specific release method is to move the movable member 23 in the axial direction away from the anti-error positioning disk 3 to drive the spring 22 and the movable pin 21 to move outward to release the restriction on the spline end main journal 11, so that the operator can take out the crankshaft 1 and adjust the direction to insert the cone end main journal 12 into the positioning chamber.

[0050] It should be noted that when the cone-end main journal 12 is inserted into the positioning chamber, the movable part 23 cannot be moved. Whether the movable part 23 can be moved depends on whether the crankshaft 1 is installed in the reverse direction. The movable part 23 is fixed in the installation chamber in the initial state. When the crankshaft 1 needs to be removed, the movable part 23 can be moved by external force.

[0051] Optionally, the movable part 23 can be a slider, a bolt, a screw, etc. When the movable part 23 is a slider, a limiting part is provided in conjunction with it to limit the movable part 23 to a certain position, and the limiting part is removed when movement is required.

[0052] It should be noted that the clamping portion 211 of the movable pin 21 has a spherical structure or other ground arc structure, and will not cause wear to the end surface of the spline end main shaft neck 11 when clamped on the outer periphery of the spline end main shaft neck 11.

[0053] Based on any of the above embodiments, the movable member 23 is a screw, and the inner wall of the mounting chamber is threadedly connected to the screw.

[0054] In this embodiment, the movable part 23 is a screw, the outer periphery of the screw is threadedly connected to the inner wall of the installation chamber, and the bottom of the screw is connected to the spring 22. When the crankshaft 1 needs to be removed, the movable pin 21 can be driven to move by screwing the screw outward to release the clamping restriction on the spline end main shaft neck 11.

[0055] Through the cooperation of the screw, the spring 22 and the movable pin 21, a relatively simple structure can be used to avoid the situation where the crankshaft 1 is installed upside down, effectively avoiding human errors, and timely discovering the correct installation direction of the crankshaft 1 to avoid affecting the production progress.

[0056] Based on any of the above embodiments, a displacement monitoring element is provided at the lower end of the clamping portion 211 of the movable pin 21, and the displacement monitoring element signal is connected to a control element. The displacement monitoring element is used to transmit the movement information of the movable pin 21 to the control element, and the control element signal is connected to an alarm.

[0057] In this embodiment, in addition to the operator judging whether the crankshaft 1 is inserted reversely, an alarm can also be used to remind the operator to ensure that timely and accurate measures are taken to ensure smooth production.

[0058] By setting a displacement monitoring element on the lower end of the movable pin 21, the movement information of the movable pin 21 is monitored by the displacement monitoring element and transmitted to the control element. The movement information here can be the movement direction, movement distance, movement coordinates, etc. When the movement information is transmitted to the control element, the control element can judge whether the crankshaft 1 is installed upside down at this time based on the information. If the crankshaft 1 is installed upside down, the control element controls the alarm connected to its information to sound an alarm to alert the operator. The alarm method is preferably a sound alarm, and it can also be combined with a light alarm method.

[0059] Optionally, the displacement monitoring element includes at least a displacement sensor or a laser sensor or other monitoring elements.

[0060] On the basis of any of the above embodiments, a limiting member slidably connected to the inner wall of the installation chamber is provided on the circumference of the movable pin 21, and when the movable pin 21 moves, the limiting member moves radially along the anti-misalignment positioning disk 3.

[0061] In this embodiment, a limit member slidably connected to the installation chamber is provided on the circumference of the movable pin 21. When the movable pin 21 moves, the limit member moves radially along the anti-misinstallation positioning disk 3 to ensure that the moving path of the movable pin 21 is perpendicular to the axis of the crankshaft 1, avoiding its deviation and ensuring a more accurate anti-misinstallation effect.

[0062] The limiting member can be a protrusion, and one or two can be provided. Preferably, two are symmetrically provided on the upper and lower sides of the movable pin 21. While meeting the installation requirements, the size of the limiting member is as small as possible so as not to affect the overall layout of the anti-error mechanism.

[0063] On the basis of any of the above embodiments, a plurality of groups of elastic components 2 are provided, and the plurality of groups of elastic components 2 are arranged around the axis direction of the positioning chamber.

[0064] In this embodiment, the number of elastic components 2 is not limited. If multiple groups are provided, the preferred arrangement is to evenly distribute them along the axial direction of the positioning chamber.

[0065] Preferably, the two groups of elastic components 2 are symmetrically arranged in the axial direction of the positioning chamber, corresponding to the two sides of the outer circumference of the crankshaft 1, to ensure the stability and reliability of the entire mechanism during error correction.

[0066] Based on any of the above embodiments, a spring chuck 4 is provided on the lower side of the anti-error positioning disk 3, and the middle part of the spring chuck 4 has a clamping hole for clamping the cone-end main shaft neck 12. When the spring chuck 4 is driven to move downward, the clamping hole clamps the cone-end main shaft neck 12 to limit its radial movement.

[0067] Please refer to Figure 2 , Figure 3 The anti-error positioning disk 3 is only used for positioning and installing the tapered end main journal 12 of the crankshaft 1 . In order to further clamp the tapered end main journal 12 , a spring chuck 4 is also provided on the lower side of the anti-error positioning disk 3 .

[0068] There is a clamping hole in the middle of the spring collet 4, and the size of the clamping hole is matched with the outer circumference of the tapered end main journal 12. When the spring collet 4 is pulled downward by the press, due to its own tapered structure, when the spring collet 4 moves downward, the clamping hole further clamps the tapered end main journal 12 to limit the radial movement of the tapered end main journal 12, so that the spline end main journal 11 of the crankshaft 1 has better stability during processing, thereby ensuring the processing quality of the spline.

[0069] Based on any of the above embodiments, a machine tool movable center 5 is provided in the spring chuck 4, one end of the machine tool movable center 5 is used to abut against the center hole of the tapered end main shaft neck 12 to limit the axial movement of the tapered end main shaft neck 12, and the other end of the machine tool movable center 5 extends out of the spring chuck 4.

[0070] Please refer to Figure 2 , Figure 3 , Figure 6 A machine tool movable center 5 is also provided in the spring chuck 4. When the cone-end main journal 12 of the crankshaft 1 passes through the anti-misalignment positioning plate 3 and the spring chuck 4, the bottom end of the cone-end main journal 12 is automatically fixed on the machine tool movable center 5 to limit the axial displacement of the cone-end main journal 12. Combined with the force of the spring chuck 4, the machine tool center can accurately cut the spline position when tightening the spline end main journal 11, thereby ensuring the processing quality of the spline.

[0071] It should be noted that the movable center 5 of the machine tool is connected to the machine tool and is mainly used for aligning the center hole of the tapered end main shaft neck 12.

[0072] Based on any of the above embodiments, an elastic member 6 is sleeved on the outer periphery of the movable center 5 of the machine tool, one end of the elastic member 6 is connected to the movable center 5 of the machine tool, and the other end of the elastic member 6 is connected to the bottom surface of the inner wall of the spring chuck 4.

[0073] Please refer to Figure 2 , Figure 3 An elastic member 6 is sleeved on the outer periphery of the active center 5 of the machine tool, one end of the elastic member 6 is connected to the active center 5 of the machine tool, and the other end is connected to the bottom surface of the inner wall of the spring chuck 4. Here, the bottom surface of the inner wall of the spring chuck 4 is Figure 2 On the bottom surface of the inner chamber of the middle spring collet 4.

[0074] When the spring chuck 4 is driven to move downward, the tapered main journal 12 is clamped, and the elastic member 6 is compressed by the downward movement of the machine tool active center 5 under the action of the spring chuck 4 and the tapered main journal 12, so that the end face of the crankshaft 1 is more closely fitted to the upper end face of the anti-misalignment positioning disk 3. The spring member 6 no longer changes after being compressed to a certain extent. At this time, the crankshaft 1 is fixedly installed in place, and precise spline cutting operations can be performed to ensure the quality of spline processing.

[0075] The specific steps of the crankshaft spline machining error prevention mechanism are as follows:

[0076] Slowly insert the conical end of the crankshaft into the positioning chamber of the anti-error positioning disk 3;

[0077] The cone end of the crankshaft pushes the movable pin 21 to retract into the installation chamber, so that the cone end of the crankshaft moves downward smoothly;

[0078] The movable center 5 of the machine tool is automatically placed in the center hole at the bottom of the cone end of the crankshaft;

[0079] The end face of the crankshaft is close to the upper end face of the anti-error positioning plate 3, the spring chuck 4 clamps the cone end of the crankshaft, the top of the machine tool presses the center hole of the spline end of the crankshaft, and the spline cutting begins.

[0080] In addition to the above-mentioned crankshaft spline processing anti-error mechanism, the utility model also provides a crankshaft processing system including the crankshaft spline processing anti-error mechanism disclosed in the above-mentioned embodiment. For the structures of other parts of the crankshaft processing system (such as the gear shaping machine, etc.), please refer to the prior art and will not be repeated in this article.

[0081] The various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0082] The above is a detailed introduction to a crankshaft spline processing error prevention mechanism and a crankshaft processing system provided by the utility model. This article uses specific examples to illustrate the principle and implementation method of the utility model. The description of the above embodiment is only used to help understand the method and core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A crankshaft spline machining error prevention mechanism, characterized in that: include: An error-proof positioning plate (3) comprising a positioning chamber and a mounting chamber arranged perpendicularly thereto, wherein the positioning chamber is used for positioning and mounting the crankshaft (1); An elastic component (2) is arranged in the installation chamber and its movable end extends into the positioning chamber, and the elastic component (2) can move along the radial direction of the anti-mistake positioning disk (3); When the conical end main journal (12) of the crankshaft (1) moves to enter the positioning chamber, the movable end of the elastic component (2) retracts in the radial direction of the anti-mistake positioning disk (3) under the action of the conical end main journal (12), so that the conical end main journal (12) is inserted into the positioning chamber; When the main journal (11) at the spline end of the crankshaft (1) moves to be inserted into the positioning chamber, the moving end of the elastic component (2) engages with the main journal (11) at the spline end to restrict its insertion into the positioning chamber.

2. The crankshaft spline machining error prevention mechanism according to claim 1, characterized in that: The elastic component (2) comprises: A movable pin (21), wherein one end of the movable pin (21) is a connecting portion (212), and the other end is provided with a clamping portion (211) for clamping the main shaft journal (11) at the spline end; A movable member (23) is movably arranged in the installation chamber; A spring (22) is provided between the movable pin (21) and the connecting portion (212); when the spline end main journal (11) of the crankshaft (1) is inserted into the installation chamber, the movable member (23) can move in a direction away from the axis of the anti-misalignment positioning plate (3) to drive the movable pin (21) to move and release the clamping connection with the spline end main journal (11).

3. The crankshaft spline machining error prevention mechanism according to claim 2, characterized in that: The movable part (23) is a screw, and the inner wall of the installation chamber is threadedly connected to the screw.

4. The crankshaft spline machining error prevention mechanism according to claim 3, characterized in that: A displacement monitoring element is provided at the lower end of the clamping portion (211) of the movable pin (21), and the displacement monitoring element signal is connected to a control element. The displacement monitoring element is used to transmit movement information of the movable pin (21) to the control element, and the control element signal is connected to an alarm.

5. The crankshaft spline machining error prevention mechanism according to claim 4, characterized in that: A limiting member slidably connected to the inner wall of the installation chamber is provided on the circumference of the movable pin (21); when the movable pin (21) moves, the limiting member moves in the radial direction of the anti-mistake positioning disk (3).

6. The crankshaft spline machining error prevention mechanism according to any one of claims 1 to 5, characterized in that: The elastic components (2) are provided in a plurality of groups, and the plurality of groups of the elastic components (2) are arranged around the axis direction of the positioning chamber.

7. The crankshaft spline machining error prevention mechanism according to claim 6, characterized in that: A spring chuck (4) is provided on the lower side of the anti-error positioning disk (3), and a clamping hole for clamping the cone-end main shaft neck (12) is provided in the middle of the spring chuck (4). When the spring chuck (4) is driven to move downward, the clamping hole clamps the cone-end main shaft neck (12) to limit its radial movement.

8. The crankshaft spline machining error prevention mechanism according to claim 7, characterized in that: A machine tool movable center (5) is arranged in the spring chuck (4), one end of the machine tool movable center (5) is used to abut against the center hole of the tapered end main shaft neck (12) to limit the axial movement of the tapered end main shaft neck (12), and the other end of the machine tool movable center (5) protrudes from the spring chuck (4).

9. The crankshaft spline machining error prevention mechanism according to claim 8, characterized in that: An elastic member (6) is sleeved on the outer periphery of the machine tool movable center (5), one end of the elastic member (6) is connected to the machine tool movable center (5), and the other end of the elastic member (6) is connected to the bottom surface of the inner wall of the spring chuck (4).

10. A crankshaft machining system, characterized in that: The invention comprises the crankshaft spline machining error prevention mechanism as described in any one of claims 1 to 9.

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