A thread tapping positioning tool for a threaded hole of a crankshaft end

Abstract

The utility model belongs to machining technical field especially, it is a kind of crankshaft end threaded hole tapping positioning tool, including bottom plate, the vertical plate is set up on bottom plate, and the supporting positioning member is equipped on the one side of vertical plate on bottom plate, and the side corresponding to the positioning support piece of vertical plate side middle part is equipped with the positioning plate, and the top is equipped with the compression positioning assembly, and the positioning plate is vertically set relative to bottom plate and vertical plate;Compression positioning assembly includes positioning member, and one side of positioning member is fixed on vertical plate, and the other side of opposite side is provided with positioning slot, and the side is also equipped with pressing plate. The one end of crankshaft is supported and positioned by supporting positioning key, and the processing end of crankshaft is clamped in positioning slot, then is fixed by pressing plate compression, and the counterweight on crankshaft is supported on positioning plate, prevents crankshaft from rotating, guarantees the positioning accuracy of crankshaft, improves product quality, and the clamping operation of crankshaft is simple, and the processing efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, and in particular to a tapping and positioning fixture for a crankshaft end threaded hole. Background Technology

[0002] The threaded hole at the end of the crankshaft is used to connect to external equipment such as the engine gearbox and flywheel to ensure the stability of power transmission.

[0003] When machining a crankshaft, after punching the end holes, tapping is required on the inner wall of the holes. Due to the long length and uneven shape of the crankshaft, if a large machine tool is used for tapping, the crankshaft clamping will be unstable during clamping, causing the crankshaft to easily shift position during tapping, resulting in poor product quality and even damage to the tapping drill bit. If a tapping machine is used to machine the crankshaft, a tooling needs to be designed to meet the machining requirements and ensure accurate crankshaft positioning.

[0004] To address the aforementioned issues, this utility model document proposes a tapping and positioning fixture for the threaded hole at the end of a crankshaft. Utility Model Content

[0005] This invention provides a positioning fixture for tapping threaded holes at the end of a crankshaft, which reduces the difficulty of tapping threaded holes at the end of the crankshaft, ensures the positioning accuracy of the crankshaft, and improves product quality and processing efficiency.

[0006] This utility model provides the following technical solution:

[0007] A crankshaft end threaded hole tapping and positioning fixture includes a base plate, a vertical plate is vertically arranged on the base plate, a support positioning component is provided on one side of the vertical plate on the base plate, a positioning plate is provided on the side of the vertical plate corresponding to the positioning support component, and a clamping positioning component is provided on the top. The positioning plate is vertically arranged relative to both the base plate and the vertical plate.

[0008] The clamping and positioning assembly includes a positioning element, one side of which is fixed to the vertical plate, and the other side of the opposite side has a positioning groove, and the other side is also provided with a pressure plate.

[0009] Furthermore, the top of the vertical plate has a rectangular groove, and the positioning component includes a positioning block. One end of the positioning block is connected to the vertical plate, and the two side walls opposite to this end are provided with mounting plates. The other end has a positioning groove, and the two side walls corresponding to this end and the mounting plate are provided with connecting plates. The mounting plate has mounting holes, and the bottom of the groove has mounting positioning holes corresponding to the mounting holes. The mounting plate is connected to the mounting positioning holes by bolts passing through the mounting positioning holes and the mounting holes. The connecting plate has connecting holes. One end of the pressure plate has a connecting positioning hole corresponding to the connecting hole, and the other end of the side wall has a connecting slot corresponding to the connecting hole. A double-ended screw is inserted through the connecting positioning hole and the corresponding connecting hole. The two ends of the double-ended screw are locked and fixed by nuts. A locking bolt is provided in another connecting hole, and one end of the locking bolt passes through the connecting slot and is provided with a locking nut.

[0010] Furthermore, the locking nut has a handle on its side wall.

[0011] Furthermore, the mounting positioning hole is a strip-shaped hole, and the mounting positioning hole is vertically arranged.

[0012] Furthermore, the supporting positioning component includes a positioning rod, and a locking hole is provided on the base plate. One end of the positioning rod is locked in the locking hole, and the other end is a cone. An annular limiting plate is provided on the side wall of the positioning rod.

[0013] Furthermore, a structural reinforcing plate is provided between the base plate and the vertical plate, with one side of the structural reinforcing plate fixed to the base plate and the other adjacent side fixed to the vertical plate.

[0014] Furthermore, a limiting groove is formed on the upper surface of the base plate, the vertical plate is inserted into the limiting groove, and the base plate and the vertical plate are fixed together by bolts.

[0015] Furthermore, the bottom surface of the limiting groove has mounting grooves at corresponding ends.

[0016] Furthermore, the positioning groove is a V-shaped groove, and dovetail grooves are opened at the contact positions between the two side walls of the V-shaped groove and the crankshaft to be processed, and a matching dovetail key is inserted in the dovetail groove.

[0017] In this invention, one end of the crankshaft is supported and positioned by a support positioning key, while the machining end of the crankshaft is clamped in the positioning groove and then compressed and fixed by a pressure plate. The counterweight on the crankshaft abuts against the positioning plate to prevent the crankshaft from rotating, ensuring the positioning accuracy of the crankshaft, improving product quality, and simplifying the crankshaft clamping operation, thereby improving processing efficiency. Attached Figure Description

[0018] Figure 1 This is a schematic diagram of the main structure of a crankshaft end thread hole tapping positioning tool provided in an embodiment of the present invention;

[0019] Figure 2 A three-dimensional structural schematic diagram of a crankshaft end thread hole tapping and positioning fixture provided in an embodiment of this utility model;

[0020] Figure 3 This is a schematic diagram of the main structure of the base plate of a crankshaft end thread hole tapping positioning tool provided in an embodiment of the present utility model;

[0021] Figure 4 This is a schematic diagram of the main structure of the vertical plate in a crankshaft end thread hole tapping and positioning fixture provided in an embodiment of the present invention.

[0022] Figure 5 A cross-sectional view of the positioning component in a crankshaft end thread hole tapping positioning fixture provided in an embodiment of this utility model;

[0023] Figure 6 This is a schematic diagram of the main structure of the pressure plate in a crankshaft end thread hole tapping positioning tool provided in an embodiment of the present utility model;

[0024] Figure 7 This is a schematic diagram of the main structure of the support and positioning component in a crankshaft end thread hole tapping and positioning fixture provided in an embodiment of the present invention.

[0025] Figure 8 This is a front view schematic diagram of the locking nut and handle in a crankshaft end thread hole tapping and positioning fixture provided in an embodiment of the present utility model.

[0026] Figure label:

[0027] 1. Base plate; 101. Limiting groove; 102. Mounting groove; 103. Snap hole; 2. Vertical plate; 201. Sliding groove; 202. Mounting positioning hole; 3. Positioning plate; 4. Positioning component; 401. Positioning block; 402. Mounting plate; 403. Mounting hole; 404. Connecting plate; 405. Connecting hole; 406. Positioning groove; 407. Dovetail groove; 408. Dovetail key; 5. Pressure plate; 501. Connecting positioning hole; 502. Connecting snap groove; 6. Support positioning component; 601. Positioning rod; 602. Annular limiting plate; 7. Structural reinforcing plate; 8. Double-ended screw; 9. Locking bolt; 10. Locking nut; 11. Handle. Detailed Implementation

[0028] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0029] In the description of the embodiments of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connection" and "installation" should be interpreted broadly. For example, "connection" can be a detachable connection or a non-detachable connection; it can be a direct connection or an indirect connection through an intermediate medium. Furthermore, "connection" can be a direct connection or an indirect connection through an intermediate medium. "Fixed" means that the relative positional relationship remains unchanged after the connection. The directional terms mentioned in the embodiments of this utility model, such as "inner," "outer," "top," and "bottom," are only for reference to the directions in the accompanying drawings. Therefore, the directional terms used are for better and clearer explanation and understanding of the embodiments of this utility model, and are not intended to 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 limitations on the embodiments of this utility model.

[0030] In this embodiment of the invention, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Therefore, a feature defined with "first" and "second" may explicitly or implicitly include one or more of that feature.

[0031] In this embodiment of the utility model, "and / or" is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent three situations: A exists alone, A and B exist simultaneously, and B exists alone. Additionally, the character " / " in this document generally indicates that the preceding and following related objects have an "or" relationship.

[0032] References to "one embodiment" or "some embodiments" as used in this specification mean that one or more embodiments of the present invention include a specific feature, structure, or characteristic described in connection with that embodiment. Therefore, the phrases "in one embodiment," "in some embodiments," "in other embodiments," "in still other embodiments," etc., appearing in different parts of this specification do not necessarily refer to the same embodiment, but rather mean "one or more, but not all, embodiments," unless otherwise specifically emphasized. The terms "comprising," "including," "having," and variations thereof mean "including but not limited to," unless otherwise specifically emphasized.

[0033] Example:

[0034] Reference Figures 1-8As shown, a crankshaft end thread hole tapping positioning fixture includes a base plate 1, a vertical plate 2 is vertically arranged on the base plate 1, a support positioning member 64 is provided on the base plate 1 on one side of the vertical plate 2, a positioning plate 3 is provided on the side of the vertical plate 2 corresponding to the positioning support member, and a pressing positioning assembly is provided on the top. The positioning plate 3 is vertically arranged relative to both the base plate 1 and the vertical plate 2.

[0035] The clamping and positioning assembly includes a positioning element 4, one side of which is fixed to the vertical plate 2, and the other side of which is opposite has a positioning groove 406, and the other side is also provided with a pressure plate 5.

[0036] One end of the crankshaft is supported and positioned by the support positioning component 64, while the machining end of the crankshaft is positioned in the machining position by the positioning groove 406. The crankshaft is pressed and fixed in the positioning groove 406 by the pressure plate 5, and the positioning plate 3 on the side of the vertical plate 2 abuts against the counterweight of the crankshaft to prevent the crankshaft from rotating during tapping, which would cause the threads to become messy and affect the quality of the product.

[0037] The vertical plate 2 is perpendicular to the base plate 1, ensuring that the crankshaft is in a vertical position after positioning, thereby ensuring that the drill bit of the tapping machine can accurately enter the tapped hole, thus ensuring product quality.

[0038] The top of the vertical plate 2 has a rectangular groove 201. The positioning component 4 includes a positioning block 401. One end of the positioning block 401 is connected to the vertical plate 2, and the two side walls opposite to this end are provided with mounting plates 402. The other end has a positioning groove 406, and the two side walls corresponding to this end and the mounting plate 402 are provided with connecting plates 404. The mounting plate 402 has mounting holes 403. The bottom surface of the groove 201 has mounting positioning holes 202 at positions corresponding to the mounting holes 403. The mounting plate 402 is connected to the mounting plate 2 by bolts passing through the mounting positioning holes 202. The connection is made of hole 403. The connecting plate 404 has a connecting hole 405. One end of the pressure plate 5 is provided with a connecting positioning hole 501 corresponding to the position of the connecting hole 405. The other end of the side wall is provided with a connecting groove 502 corresponding to the position of the connecting hole 405. A double-ended screw 8 is provided through the connecting positioning hole 501 and the corresponding connecting hole 405. The two ends of the double-ended screw 8 are locked and fixed by nuts. A locking bolt 9 is provided in another connecting hole 405. One end of the locking bolt 9 passes through the connecting groove 502 and is provided with a locking nut 10.

[0039] Positioning block 401 is positioned by sliding groove 201. Then, positioning block 401 is fixed in positioning groove 406 by bolts through mounting positioning hole 202 on vertical plate 2 and mounting hole 403 on mounting plate 402. The machining end of crankshaft is positioned by positioning groove 406. Then, the connecting positioning hole 501 on pressure plate 5 and the connecting hole 405 on connecting plate 404 are connected by double-ended screw 8 and nut. One end of pressure plate 5 is connected to connecting plate 404. At the same time, pressure plate 5 can also rotate on double-ended screw 8. The other end of pressure plate 5 is locked on locking bolt 9 through connecting slot 502. Then, pressure plate 5 is pressed by locking nut 10, thereby pressing and fixing crankshaft in positioning groove 406 by pressure plate 5.

[0040] The locking nut 10 has a handle 11 on its side wall.

[0041] Each time the crankshaft is clamped, the pressure plate 5 needs to be moved away from the positioning groove 406 so that the crankshaft can be taken out of the positioning groove 406. The handle 11 makes it easy to rotate the locking nut 10. By loosening the locking nut 10 with the handle 11, the end of the pressure plate 5 with the connecting slot 502 is loosened. The other end of the pressure plate 5 is rotatably set on the double-ended screw 8, so the pressure plate 5 can be rotated to move the pressure plate 5 away from the positioning groove 406 so that the crankshaft can be taken out. When clamping the crankshaft, rotating the pressure plate 5 makes the reamer slot engage with the locking bolt 9, and then the locking nut 10 is tightened by tightening the handle 11 to clamp the crankshaft. This improves the convenience of operation for workers, thereby improving the clamping efficiency of the crankshaft and the processing efficiency of the crankshaft.

[0042] The mounting positioning hole 202 is a strip-shaped hole, and the mounting positioning hole 202 is set vertically.

[0043] The position of the positioning block 401 within the slide groove 201 can be adjusted through the strip hole, thereby adjusting the height of the positioning block 401. This allows the function to adapt to the tapping needs of crankshafts of different lengths, improving the adaptability of the tooling.

[0044] The support positioning component 64 includes a positioning rod 601. A locking hole 103 is opened on the base plate 1. One end of the positioning rod 601 is locked in the locking hole 103, and the other end is a cone. An annular limiting plate 602 is provided on the side wall of the positioning rod 601.

[0045] The positioning rod 601 is positioned on the base plate 1 through the locking hole 103, ensuring its position remains unchanged. Its other end is a cone that can penetrate into the hole at the end of the crankshaft for positioning. The cone can accommodate holes of different diameters, thus meeting the machining positioning requirements of crankshafts of different sizes and improving the adaptability of the tooling. The annular limiting plate 602 enhances the structural strength of the positioning rod 601, preventing deformation and avoiding skewness under force, which could affect the crankshaft's positioning accuracy and ensure product quality.

[0046] A structural reinforcing plate 7 is also provided between the base plate 1 and the vertical plate 2. One side of the structural reinforcing plate 7 is fixed to the base plate 1, and the other side is fixed to the vertical plate 2.

[0047] The structural reinforcement plate 7 can not only support the vertical plate 2 to prevent deformation of the vertical plate 2 due to long-term use of the tooling, but also improve the strength of the connection structure between the vertical plate 2 and the base plate 1, preventing the connection between the vertical plate 2 and the base plate 1 from loosening, which would lead to unstable position of the vertical plate 2, affect the positioning accuracy of the crankshaft, and ensure product quality.

[0048] A limiting groove 101 is opened on the upper surface of the base plate 1, and the vertical plate 2 is inserted into the limiting groove 101. The base plate 1 and the vertical plate 2 are fixed by bolts.

[0049] The vertical plate 2 is installed by means of the limiting groove 101, which facilitates the positioning of the vertical plate 2 and improves the stability of the installation structure of the vertical plate 2.

[0050] The bottom surface of the limiting groove 101 has mounting grooves 102 at the corresponding two ends.

[0051] The mounting slot 102 facilitates the fixing of the base plate 1 to the usage position, and the tooling can be pressed onto the worktable of the external tapping equipment by transmitting power to the mounting slot 102 via bolts.

[0052] The positioning groove 406 is a V-shaped groove. Dovetail grooves 407 are opened at the contact positions between the two side walls of the V-shaped groove and the crankshaft to be processed. A matching dovetail key 408 is inserted in the dovetail groove 407.

[0053] The crankshaft has a high hardness. After prolonged use, the contact surface between the crankshaft and the positioning groove 406 is subjected to pressure for an extended period, which can easily cause damage and deformation, resulting in inaccurate positioning accuracy of the crankshaft. In this case, the dovetail key 408 that contacts the crankshaft can be removed from the dovetail groove 407 and replaced with a new dovetail key 408 to ensure the positioning accuracy of the crankshaft and guarantee the quality of the product.

[0054] In use, the fixture is fixed to the tapping machine's machining platform via the mounting slot 102 on the base plate 1. The crankshaft is positioned with the tapping end facing upwards, and the other end resting against the cone of the positioning rod 601. Then, the side of the crankshaft's machining end rests against the dovetail key 408 of the positioning slot 406, and the counterweight on the crankshaft rests against the positioning plate 3 on the side of the vertical plate 2. The pressure plate 5 is then rotated so that its connecting slot 502 engages with the locking bolt 9. Finally, the handle 11 is rotated... The locking nut 10 is moved to lock the pressure plate 5, which in turn presses and fixes the crankshaft in the positioning groove 406, thus completing the clamping and positioning of the crankshaft. The hole at the end of the crankshaft can then be tapped using a tapping machine. After tapping is completed, the locking nut 10 is turned by the handle 11 to loosen the pressure plate 5. Then, the positioning of the crankshaft is released by turning the pressure plate 5, and the crankshaft is then removed from the positioning groove 406. The worker can then continue to clamp other crankshafts to be processed.

[0055] In practical use, the positioning rod 601 and the annular limiting plate 602 of the support positioning component 64 are integrally formed, which is convenient for processing and can improve the structural strength of the support positioning component 64.

[0056] The positioning block 401, mounting plate 402 and connecting plate 404 are integrally formed, which is convenient for processing and can improve the structural strength of the clamping and positioning assembly.

[0057] The above are merely specific embodiments of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. In the absence of conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. Therefore, the protection scope of this utility model should be determined by the scope of the claims.

Claims

1. A tapping and positioning fixture for a crankshaft end threaded hole, characterized in that, Includes a base plate, on which a vertical plate is vertically arranged, and a support positioning component is provided on one side of the base plate located on the vertical plate. A positioning plate is provided on the side of the vertical plate corresponding to the positioning support component, and a pressing positioning component is provided on the top. The positioning plate is vertically arranged relative to both the base plate and the vertical plate. The clamping and positioning assembly includes a positioning element, one side of which is fixed to the vertical plate, and the other side of the opposite side has a positioning groove, and the other side is also provided with a pressure plate.

2. The crankshaft end threaded hole tapping and positioning fixture according to claim 1, characterized in that, The top of the vertical plate has a rectangular groove. The positioning component includes a positioning block. One end of the positioning block is connected to the vertical plate, and the two side walls opposite to this end are provided with mounting plates. The other end has a positioning groove, and the two side walls corresponding to this end and the mounting plate are provided with connecting plates. The mounting plate has mounting holes. The bottom of the groove has mounting positioning holes corresponding to the mounting holes. The mounting plate is connected to the mounting positioning holes by bolts passing through them. The connecting plate has connecting holes. One end of the pressure plate has a connecting positioning hole corresponding to the connecting hole, and the other end of the side wall has a connecting slot corresponding to the connecting hole. A double-ended screw is inserted through the connecting positioning hole and the corresponding connecting hole. The two ends of the double-ended screw are locked and fixed by nuts. A locking bolt is provided in the other connecting hole. One end of the locking bolt passes through the connecting slot and is provided with a locking nut.

3. The crankshaft end threaded hole tapping and positioning fixture according to claim 2, characterized in that, The locking nut has a handle on its side wall.

4. The crankshaft end threaded hole tapping and positioning fixture according to claim 2, characterized in that, The mounting positioning hole is a strip-shaped hole and is set vertically.

5. The crankshaft end threaded hole tapping and positioning fixture according to claim 1, characterized in that, The supporting positioning component includes a positioning rod, and a locking hole is opened on the base plate. One end of the positioning rod is locked in the locking hole, and the other end is a cone. An annular limiting plate is provided on the side wall of the positioning rod.

6. The crankshaft end threaded hole tapping and positioning fixture according to claim 1, characterized in that, A structural reinforcing plate is also provided between the base plate and the vertical plate. One side of the structural reinforcing plate is fixed to the base plate, and the other side is fixed to the vertical plate.

7. The crankshaft end threaded hole tapping and positioning fixture according to claim 1, characterized in that, The upper surface of the base plate has a limiting groove, the vertical plate is inserted into the limiting groove, and the base plate and the vertical plate are fixed together by bolts.

8. The crankshaft end threaded hole tapping and positioning fixture according to claim 7, characterized in that, The bottom surface of the limiting groove has mounting grooves at the corresponding two ends.

9. The crankshaft end threaded hole tapping and positioning fixture according to claim 1, characterized in that, The positioning groove is a V-shaped groove, and dovetail grooves are opened at the contact positions between the two side walls of the V-shaped groove and the crankshaft to be processed. A matching dovetail key is inserted in the dovetail groove.

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