A deep hole drilling tool for engine crankshaft

Abstract

This utility model belongs to the field of machining technology, specifically a deep hole drilling fixture for engine crankshafts. It includes a base, a guide plate, a cylinder, and a positioning assembly. The guide plate is vertically positioned and has multiple guide holes, each containing a drill sleeve. A center is positioned on the cylinder corresponding to one of the guide holes. An internally threaded sleeve is located inside the cylinder, with a lead screw threadedly connected to it. A guide support plate, fixed to the machining equipment, is mounted on the lead screw, and a bearing is positioned on the guide support plate. The crankshaft is placed on the positioning assembly, with the end face to be machined resting against the drill sleeve. Moving the cylinder causes the center to abut against the crankshaft wheel end, completing the crankshaft clamping and positioning. The fixture is then fixed to the machine tool, allowing the machine tool drill bit to enter through the drill sleeve for deep hole machining. This allows for simultaneous machining of multiple crankshafts, improving machining efficiency. The worker only needs to place the crankshaft and move the cylinder, enhancing worker safety.

Description

Technical Field

[0001] This utility model relates to the field of machining technology, and in particular to a deep hole drilling tool for engine crankshafts. Background Technology

[0002] With the development of technology, the price of cars is getting lower and lower, and the production and sales of cars are also increasing significantly. As a result, the production of cars also needs to increase. The engine is a major component of a car, and the crankshaft is a major component of the engine. Therefore, the production and processing efficiency of the crankshaft has also increased accordingly.

[0003] The crank consists of a rod and a wheel. One end of the rod is connected to the wheel, while the other end has a deep hole for mounting and fixing the crank. Currently, when manufacturing cranks, this deep hole is usually drilled using a drilling machine. Workers can only process the deep holes of the cranks one by one, which is very inefficient. The distance between the worker and the drill bit is very close, and if there is a mistake, it is easy to get injured, which makes the worker's safety during processing low.

[0004] To address the aforementioned problems, this utility model document proposes a deep hole drilling tool for engine crankshafts. Utility Model Content

[0005] This utility model provides a deep hole drilling fixture for engine crankshafts, which improves the efficiency of deep hole machining of crankshafts and ensures the safety of workers during operation.

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

[0007] A deep hole drilling fixture for engine crankshafts includes a base, on which a guide plate, a cylinder, and a positioning assembly are mounted. The guide plate is vertically positioned, and the cylinder is located on one side of the guide plate and slidably positioned relative to the guide plate in a vertical direction. The positioning assembly is positioned between the guide plate and the cylinder. The guide plate has multiple guide holes, and a drill sleeve is installed within each guide hole. The cylinder has a box-shaped structure, with a center point on the side wall adjacent to the guide plate corresponding to the guide hole position. An internally threaded sliding sleeve is installed on the opposite side wall. A lead screw is threadedly connected to the internally threaded sliding sleeve, and a guide support plate, which is fixed to the machining equipment, is mounted on the lead screw. A bearing is installed at a corresponding position on the guide support plate. The central axis of the drill sleeve is coaxial with the central axis of the center point.

[0008] Furthermore, the positioning assembly includes a front plate for positioning the crankshaft and a rear plate for positioning the crank wheel. The front plate is adjacent to the guide plate, and the rear plate is adjacent to the cylinder block. The top surface of the front plate is provided with a rod pad, and the rod pad has a rod slot. The top surface of the rear plate is provided with a wheel slot.

[0009] Furthermore, the base is also provided with a mounting positioning plate, which is located between the front plate and the rear plate, and the front plate and the rear plate are fixed to the mounting positioning plate by bolts.

[0010] Furthermore, the upper surface of the base has a positioning groove, which is perpendicular to the guide plate. A flat key is provided in the positioning groove, and a sliding groove matching the flat key is provided on the lower surface of the cylinder. The cylinder slides along the flat key, and the sum of the depths of the positioning groove and the sliding groove is the same as the thickness of the flat key.

[0011] Furthermore, it also includes a guide assembly, which is disposed between the cylinder body and the guide plate. The guide assembly includes a guide rod, one end of which is disposed on the cylinder body and the other end of which passes through the guide plate and is slidably connected to the guide plate. The guide plate has a guide hole through which the guide rod passes.

[0012] Furthermore, it also includes a cooling assembly, which includes a main channel disposed inside the guide plate and along the length of the guide plate. The inlet end of the main channel is located on the side of the guide plate. A first branch channel is provided on the main channel. The inlet end of the first branch channel is connected to the main channel, and the outlet end is located on the top surface of the guide plate. A "J"-shaped guide pipe is provided at the outlet end of the first branch channel, and the guide pipe is located above the drill sleeve.

[0013] Furthermore, a positioning sleeve is provided inside the cylinder, and the tip is disposed inside the positioning sleeve.

[0014] Furthermore, the drill bushing has a cylindrical structure with an annular guide groove on its outer side wall and an annular positioning plate at one end. The annular positioning plate has a positioning hole for positioning the end of the crank. The central axis of the positioning hole is coaxial with the central axis of the drill bushing. The side wall of the drill bushing has a through hole. One end of the through hole is connected to the annular guide groove, and the other end is located at the connection between the inner side wall of the drill bushing and the annular positioning plate. A second branch channel is also opened in the guide plate. One end of the second branch channel is connected to the main channel, and the other end is connected to the annular guide groove on the drill bushing in the guide hole.

[0015] In this invention, the crank is placed on the positioning assembly, and the end face of the crank to be machined rests against the drill sleeve. Then, by moving the cylinder, the tip abuts against the wheel end of the crank, completing the clamping and positioning of the crank. The fixture is then fixed on the machine tool, and the machine tool drill bit enters from the drill sleeve to perform deep hole machining on the crank. This allows for the simultaneous machining of multiple cranks, improving machining efficiency. At the same time, the worker only needs to place the crank and move the cylinder, improving the safety of the worker. Attached Figure Description

[0016] Figure 1 A top view of a deep hole drilling fixture for an engine crankshaft provided in an embodiment of this utility model;

[0017] Figure 2 This is a schematic diagram of the main structure of a deep hole drilling tool for an engine crankshaft provided in an embodiment of the present invention;

[0018] Figure 3 A three-dimensional structural schematic diagram of a deep hole drilling fixture for an engine crankshaft provided in an embodiment of this utility model;

[0019] Figure 4 This is a top view of the cylinder block structure of an engine crankshaft deep hole drilling tool provided in an embodiment of the present invention;

[0020] Figure 5 A top view of the base structure of a deep hole drilling tool for an engine crankshaft provided in an embodiment of this utility model;

[0021] Figure 6 for Figure 5 AA section view;

[0022] Figure 7 This is a schematic diagram of the main structure of the middle rod pad of a deep hole drilling tool for an engine crankshaft provided in an embodiment of the present utility model;

[0023] Figure 8 This is a cross-sectional view of the drill bushing in a deep hole drilling tool for an engine crankshaft provided in an embodiment of the present invention.

[0024] Figure label:

[0025] 1. Base; 101. Mounting positioning plate; 102. Positioning groove; 2. Guide plate; 3. Cylinder body; 301. Slide groove; 4. Positioning assembly; 401. Front plate; 402. Rear plate; 403. Rod pad; 40301. Rod slot; 5. Drill sleeve; 501. Annular positioning plate; 502. Annular guide groove; 503. Through hole; 504. Positioning hole; 6. Center; 7. Lead screw; 8. Guide support plate; 9. Guide rod; 10. Flat key; 11. Main channel; 12. First branch channel; 13. Guide pipe; 14. Internal threaded sleeve; 15. Bearing; 16. Positioning sleeve; 17. Guide hole; 18. Second branch channel. Detailed Implementation

[0026] The embodiments of the present invention will now be described with reference to the accompanying drawings.

[0027] 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.

[0028] 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.

[0029] 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.

[0030] 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.

[0031] Example:

[0032] Reference Figures 1 to 8As shown, a deep hole drilling fixture for engine crankshafts includes a base 1, on which a guide plate 2, a cylinder 3, and a positioning component 4 are mounted. The guide plate 2 is vertically arranged, and the cylinder 3 is located on one side of the guide plate 2 and is slidably arranged relative to the guide plate 2 in the vertical direction. The positioning component 4 is located between the guide plate 2 and the cylinder 3. The guide plate 2 has multiple guide holes 17, and a drill sleeve 5 is provided in each of the guide holes 17. The cylinder 3 has a box-shaped structure, and a center point 6 is provided on the side wall adjacent to the guide plate 2 at the position corresponding to the guide hole 17. An internally threaded sliding sleeve 14 is provided on the opposite side wall. A lead screw 7 is threadedly connected inside the internally threaded sliding sleeve 14. A guide support plate 8, which is fixed to the processing equipment, is also provided on the lead screw 7. A bearing 15 is provided at the corresponding position of the guide support plate 8. The central axis of the drill sleeve 5 is coaxial with the central axis of the center point 6.

[0033] The drill bushing 5 allows the drill bit of the machine tool to pass through. The machining end face of the crank to be machined abuts against the drill bushing 5, while the other end of the crank is fixed on the positioning component 4. By moving the cylinder 3, the tip 6 on the cylinder 3 abuts against the crank, thereby pressing the crank between the tip 6 and the drill bushing 5.

[0034] The guide support plate 8 is fixed on the worktable of the machine tool. The end of the lead screw 7 is connected to the rotation power mechanism of the machine tool. Rotating the lead screw 7 drives the internal threaded sleeve 14 to move on the lead screw 7, thereby driving the cylinder 3 to move.

[0035] The guide plate 2 is provided with multiple guide holes 17, and each guide hole 17 corresponds to a pin, which can simultaneously hold multiple cranks to be processed and perform deep hole processing on the ends of multiple cranks, thereby improving work efficiency.

[0036] The positioning assembly 4 includes a front plate 401 for positioning the crankshaft and a rear plate 402 for positioning the crank wheel. The front plate 401 is adjacent to the guide plate 2, and the rear plate 402 is adjacent to the cylinder block 3. The top surface of the front plate 401 is provided with a rod pad 403, and the rod pad 403 has a rod slot 40301. The top surface of the rear plate 402 is provided with a wheel slot.

[0037] The crankshaft is supported and positioned at the connection between the crank and the disc by the crankshaft groove 40301 on the crankshaft pad 403. The crankshaft pad 403 is set on the front plate 401, and the crankshaft pad 403 can be replaced to meet the processing of different models of cranks. The crank wheel is supported by the rear plate 402. Since the weight of one end of the crank wheel is greater than the weight of the other end, the front plate 401 and the rear plate 402 support the wheel and the end of the crankshaft connecting to the wheel, which facilitates the stable placement of the crank.

[0038] The base 1 is also provided with a mounting positioning plate 101, which is located between the front plate 401 and the rear plate 402. The front plate 401 and the rear plate 402 are fixed to the mounting positioning plate 101 by bolts.

[0039] The front plate 401 and the rear plate 402 are connected to form a whole by installing the positioning plate 101, which improves the stability of the installation structure of the front plate 401 and the rear plate 402. In addition, it is also convenient to install the front plate 401 and the rear plate 402. The front plate 401 and the rear plate 402 can be directly fixed by bolts. The positioning is simple and convenient, which improves the assembly efficiency of the tooling and increases the work efficiency of the workers.

[0040] The upper surface of the base 1 has a positioning groove 102, which is perpendicular to the guide plate 2. A flat key 10 is provided in the positioning groove 102. The lower surface of the cylinder 3 has a sliding groove 301 that matches the flat key 10. The cylinder 3 slides along the flat key 10. The sum of the depths of the positioning groove 102 and the sliding groove 301 is the same as the thickness of the flat key 10.

[0041] The flat key 10 is fixed by the positioning groove 102. The flat key 10 is provided with a countersunk hole. The flat key 10 is fixed in the positioning groove 102 by bolts. The countersunk hole avoids the bolts from affecting the sliding of the cylinder body 3. The thickness of the flat key 10 is greater than the depth of the positioning groove 102, so that the flat key 10 protrudes from the base 1. The sliding groove 301 at the bottom of the cylinder body 3 cooperates with the flat key 10, so that the cylinder body 3 can slide along the flat key 10, which plays a guiding role in the movement direction of the cylinder body 3.

[0042] It also includes a guide assembly, which is located between the cylinder body 3 and the guide plate 2. The guide assembly includes a guide rod 9, one end of which is located on the cylinder body 3 and the other end passes through the guide plate 2 and is slidably connected to the guide plate 2. The guide plate 2 has a guide hole 17, through which the guide rod 9 passes.

[0043] When the cylinder body 3 moves, the guide rod 9 slides along the guide hole 17 on the guide plate 2, which further provides stability to the moving direction of the cylinder body 3, ensures that the tip 6 can accurately abut against the middle of the crank, improves the stability of the crank positioning, and prevents the crank position from changing during drilling, thus affecting product quality.

[0044] It also includes a cooling assembly, which includes a main channel 11. The main channel 11 is located inside the guide plate 2 and is arranged along the length of the guide plate 2. The inlet end of the main channel 11 is located on the side of the guide plate 2. A first branch channel 12 is provided on the main channel 11. The inlet end of the first branch channel 12 is connected to the main channel 11, and the outlet end is located on the top surface of the guide plate 2. A "J"-shaped guide pipe 13 is provided at the outlet end of the first branch channel 12. The guide pipe 13 is located above the drill sleeve 5.

[0045] The inlet end of the main channel 11 is located on the side of the guide plate 2. The main channel 11 can be drilled directly from the side of the guide plate 2. Then, the first branch channel 12 connected to the main channel 11 is drilled from the top of the guide plate 2, which reduces the processing difficulty. The main channel 11 is connected to the external coolant supply pipe. After flowing into the first branch channel 12 from the main channel 11, it flows out from the guide pipe 13. The guide pipe 13 is located above the drill sleeve 5 and can directly guide the coolant to the connection between the crank and the drill sleeve 5. This connection is the drilling position, thereby cooling the drilling end.

[0046] The cylinder body 3 is provided with a positioning sleeve 16, and the tip 6 is set inside the positioning sleeve 16.

[0047] The positioning sleeve 16 facilitates the installation and fixation of the tip 6 onto the cylinder block 3. At the same time, the tip 6 is protected by the sleeve, ensuring the stability of the tip 6 mounting structure after it comes into contact with the crank to be processed, thereby ensuring the stability of the tip 6 fixing structure to the crank.

[0048] The drill bushing 5 has a cylindrical structure with an annular guide groove 502 on its outer wall. One end of the bushing has an annular positioning plate 501 with a positioning hole 504 for positioning the crank end. The central axis of the positioning hole 504 is coaxial with the central axis of the drill bushing 5. A through hole 503 is formed on the side wall of the drill bushing 5. One end of the through hole 503 communicates with the annular guide groove 502, and the other end is located at the connection between the inner side wall of the drill bushing 5 and the annular positioning plate 501. A second branch channel 18 is also formed inside the guide plate 2. One end of the second branch channel 18 communicates with the main channel 11, and the other end communicates with the annular guide groove 502 on the drill bushing 5 inside the guide hole 17. Coolant can also flow through the second branch channel 18 into the annular guide groove 502, and further cool the machining area on the machining end face where the through hole 503 flows.

[0049] In use, the guide plate 2 is fixed to the base 1 with bolts, and the flat key 10 is fixed in the positioning groove 102 with countersunk bolts. The front plate 401 and the rear plate 402 are placed on both sides of the mounting positioning plate 101 and then fixed with bolts. According to the model of the crank to be processed, a suitable rod pad 403 is selected and fixed to the front plate 401 with bolts. The base 1 and the guide support plate 8 are fixed on the processing table of the processing machine tool, and the lead screw 7 is connected to the rotating mechanism of the processing machine tool. Drilling can then be performed.

[0050] The worker places the crankshaft to be processed on the rod pad 403, while the wheel portion of the crankshaft is placed on the rear plate 402. The end of the crankshaft requiring a deep hole rests against the drill sleeve 5. Then, the machine tool's rotational power mechanism, connected to the lead screw 7, is activated, causing the lead screw 7 to rotate. This moves the cylinder 3 towards the guide plate 2, causing the center point 6 to abut against the end face of the crankshaft. The clamping of the center point 6 with the drill sleeve 5 completes the crankshaft positioning. The machining drill bit of the machine tool is then activated, extending from the drill sleeve 5 to contact the end face of the crankshaft, thus machining a deep hole on the end face of the crankshaft abutting against the drill sleeve 5. Throughout the entire processing, the worker only needs to place the crankshaft to be processed on the base 1 and start the machine tool. Multiple crankshafts can be processed simultaneously, improving processing efficiency and worker safety.

[0051] In actual use, an annular positioning block is fixedly installed on the lead screw 7, and a slot is opened on one side of the guide support plate 8. The bearing 15 is inserted into the slot, and the annular positioning block is inserted into the bearing 15. A cover plate is provided on the side of the guide support plate 8 with the slot, and the bearing 15 is pressed by the cover plate to prevent the bearing 15 from falling out of the slot.

[0052] The first branch channel 12 is provided with an internal thread on the side of the outlet end of the top surface of the guide plate 2, and the guide pipe 13 is provided at the outlet end of the first branch channel 12 through a threaded connection.

[0053] The front plate 401 has a limiting groove on its top surface, and the rod pad 403 has a limiting block on its bottom surface that matches the limiting groove. The limiting groove and the limiting block work together to facilitate the positioning of the rod pad 403 when it is fixed on the front plate 401.

[0054] 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. An engine crank deep hole drilling tooling, characterized by, The system includes a base, on which a guide plate, a cylinder, and a positioning assembly are mounted. The guide plate is vertically positioned, and the cylinder is located on one side of the guide plate and slidably positioned relative to the guide plate in a vertical direction. The positioning assembly is positioned between the guide plate and the cylinder. The guide plate has multiple guide holes, and a drill sleeve is installed inside each guide hole. The cylinder has a box-shaped structure, with a center point on the side wall adjacent to the guide plate at the position corresponding to the guide hole. An internally threaded sliding sleeve is installed on the opposite side wall. A lead screw is threadedly connected inside the internally threaded sliding sleeve, and a guide support plate, which is fixed to the processing equipment, is mounted on the lead screw. A bearing is installed at the corresponding position on the guide support plate. The central axis of the drill sleeve is coaxial with the central axis of the center point.

2. The engine crank deep hole drilling tooling kit of claim 1, wherein, The positioning assembly includes a front plate for positioning the crankshaft and a rear plate for positioning the crank wheel. The front plate is adjacent to a guide plate, and the rear plate is adjacent to the cylinder block. The top surface of the front plate is provided with a rod pad, and the rod pad has a rod slot. The top surface of the rear plate is provided with a wheel slot.

3. The engine crank deep hole drilling tooling kit of claim 2, wherein, The base is also provided with a mounting positioning plate, which is located between the front plate and the rear plate. The front plate and the rear plate are fixed to the mounting positioning plate by bolts.

4. The engine crank deep hole drilling tooling kit of claim 1, wherein, The upper surface of the base has a positioning groove, which is perpendicular to the guide plate. A flat key is provided in the positioning groove. The lower surface of the cylinder has a sliding groove that matches the flat key. The cylinder slides along the flat key. The sum of the depths of the positioning groove and the sliding groove is the same as the thickness of the flat key.

5. The engine crank deep hole drilling tooling kit of claim 1, wherein, It also includes a guide assembly, which is disposed between the cylinder body and the guide plate. The guide assembly includes a guide rod, one end of which is disposed on the cylinder body and the other end of which passes through the guide plate and is slidably connected to the guide plate. The guide plate has a guide hole through which the guide rod passes.

6. The deep hole drilling fixture for engine crankshafts according to claim 1, characterized in that, It also includes a cooling assembly, which includes a main channel disposed inside the guide plate and along the length of the guide plate. The inlet end of the main channel is located on the side of the guide plate. A first branch channel is provided on the main channel. The inlet end of the first branch channel is connected to the main channel, and the outlet end is located on the top surface of the guide plate. A "J"-shaped guide pipe is provided at the outlet end of the first branch channel, and the guide pipe is located above the drill sleeve.

7. The deep hole drilling fixture for engine crankshafts according to claim 1, characterized in that, The cylinder body is provided with a positioning sleeve, and the tip is set inside the positioning sleeve.

8. The engine crank deep hole drilling tooling kit of claim 1, wherein, The drill bushing has a cylindrical structure with an annular guide groove on its outer side wall and an annular positioning plate at one end. The annular positioning plate has a positioning hole for positioning the end of the crank. The central axis of the positioning hole is coaxial with the central axis of the drill bushing. The side wall of the drill bushing has a through hole. One end of the through hole is connected to the annular guide groove, and the other end is located at the connection between the inner side wall of the drill bushing and the annular positioning plate. A second branch channel is also opened in the guide plate. One end of the second branch channel is connected to the main channel, and the other end is connected to the annular guide groove on the drill bushing in the guide hole.

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