A drilling and positioning fixture for an engine crankshaft inclined oil hole

Abstract

This utility model belongs to the technical field of engine parts, specifically a drilling and positioning fixture for an engine crankshaft inclined oil hole. It includes a base with a support block on it. The support block has a right-angled triangular cross-section with a 60° inclined surface. A working plate is provided on the inclined surface, with a first strip-shaped hole and a first locking hole. A drill sleeve is installed in the first locking hole. The drill sleeve includes a locking block and a guide block. The guide block is cylindrical and engages with the first locking hole. The locking block is located at one end of the guide block. The other end of the guide block has a milled inclined surface facing the side wall, with an angle of 30 degrees between the milled inclined surface and the central axis of the guide block. A guide hole is provided on the milled inclined surface, perpendicular to it. The milled inclined surface is horizontally upward. The eccentric hole at the crankshaft's machining end is fitted onto the drill sleeve, with one end inserted into the first strip-shaped hole. The crankshaft is positioned by the drill sleeve. The inclined oil hole is vertical. The drill sleeve supports and positions the crankshaft, improving the clamping and positioning efficiency of the crankshaft while reducing the workload of workers and increasing work efficiency.

Description

Technical Field

[0001] This utility model relates to the field of engine component processing technology, and in particular to a drilling and positioning fixture for an inclined oil hole in an engine crankshaft. 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 has an inclined oil hole that extends from the eccentric hole into the crank's interior. The angle between the inclined oil hole and the crank stem is 60°. Lubricating oil is introduced through the inclined oil hole to reduce wear during crank operation and improve the crank's service life. The inclined oil hole is usually drilled using a drill bit. However, since the end of the crank where the inclined oil hole is to be machined is disc-shaped, its position is easily affected by force. Therefore, currently, a clamping device is usually used to clamp the other end of the crank before drilling. However, this method is inefficient. Clamping the crank requires a lot of time for workers, and the clamping length must be guaranteed to ensure the drilling position. This results in low product processing efficiency, low product qualification rate, and high production costs for enterprises.

[0004] To address the aforementioned issues, this utility model document proposes a drilling and positioning fixture for the inclined oil hole of an engine crankshaft. Utility Model Content

[0005] This utility model provides a drilling and positioning fixture for the inclined oil hole of an engine crankshaft, which reduces the workload of workers, improves work efficiency, increases product qualification rate, and reduces enterprise production costs.

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

[0007] A drilling and positioning fixture for an inclined oil hole in an engine crankshaft includes a base with two parallel support blocks vertically arranged on it. The longitudinal section of each support block is a right-angled triangle, and the inclined surface of the support block is inclined at 60°. A working plate is arranged parallel to the inclined surface of the support block. The working plate has a first strip hole and a first locking hole. A drill sleeve is locked in the first locking hole. The drill sleeve includes a locking block and a guide block. The guide block has a cylindrical structure, and its diameter is the same as the diameter of the eccentric hole on the crankshaft to be processed. The locking block cooperates with the first locking hole and is located at one end of the guide block. The other end of the guide block has a milled inclined surface facing the side wall. The angle between the milled inclined surface and the central axis of the guide block is 30 degrees. A guide hole is provided on the milled inclined surface, and the guide hole is perpendicular to the milled inclined surface. The milled inclined surface is horizontally upward.

[0008] Furthermore, the surface of the working plate has a slot, in which a positioning plate is inserted. The positioning plate has a second slot corresponding to the position of the first slot and a second slot corresponding to the position of the first slot. The guide block is inserted into the second slot.

[0009] Furthermore, the card block has a cylindrical structure with milled planes on its sidewalls along the length direction, and the shape of the first card hole matches the shape of the card block.

[0010] Furthermore, it also includes a pressing mechanism. The working plate has a third locking hole, in which a transition connecting block is locked. The transition connecting block is equipped with a corner cylinder, which is a 90° corner cylinder. The output shaft of the corner cylinder is equipped with a strip-shaped pressing block.

[0011] Furthermore, the third locking hole is provided with a first strip hole and a first locking hole on both sides, and the output shaft of the corner cylinder is connected to the middle of the pressure block.

[0012] Furthermore, the working plate has a positioning hole on its side corresponding to the position of the drill sleeve, which is connected to the first locating hole. A positioning bolt is provided in the positioning hole, and the positioning bolt abuts against the side wall of the drill sleeve.

[0013] Furthermore, the base is provided with a positioning groove.

[0014] In this invention, one end of the crank is inserted into the first strip hole, and the eccentric hole at the machining end is fitted onto the drill bushing. The crank is positioned by the drill bushing. Since the inclined surface of the support block is 60 degrees and the inclined angle of the milled inclined surface of the drill bushing is 30 degrees, the crank is placed at an inclined angle of 30 degrees. The inclined oil hole to be machined is in the vertical direction. By supporting and positioning the crank with the drill bushing, the clamping and positioning efficiency of the crank is improved, while reducing the workload of the workers and improving work efficiency. Attached Figure Description

[0015] Figure 1 A three-dimensional structural schematic diagram of a drilling and positioning fixture for an engine crankshaft inclined oil hole provided in an embodiment of this utility model;

[0016] Figure 2 This is a schematic diagram of the main structure of a drilling and positioning fixture for an engine crankshaft inclined oil hole provided in an embodiment of the present invention;

[0017] Figure 3 for Figure 2 AA section view;

[0018] Figure 4 for Figure 2 BB cross-sectional view;

[0019] Figure 5 for Figure 2 CC section view;

[0020] Figure 6 This is a schematic diagram of the main structure of the working plate in an engine crankshaft inclined oil hole drilling and positioning fixture provided in an embodiment of the present utility model.

[0021] Figure 7 for Figure 6 DD sectional view;

[0022] Figure 8 A three-dimensional structural diagram of the support block in a drilling and positioning fixture for an engine crankshaft inclined oil hole provided in an embodiment of this utility model;

[0023] Figure 9 This is a schematic diagram of the main structure of the positioning plate in an engine crankshaft inclined oil hole drilling positioning fixture provided in an embodiment of the present utility model.

[0024] Figure 10 A three-dimensional structural diagram of the drill bushing in an engine crankshaft inclined oil hole drilling positioning tool provided for an embodiment of this utility model;

[0025] Figure 11 This is a cross-sectional view of the drill bushing in an engine crankshaft inclined oil hole drilling positioning tool provided in an embodiment of the present utility model.

[0026] Figure label:

[0027] 1. Base; 101. Positioning groove; 2. Support block; 3. Working plate; 301. First strip hole; 302. First locking hole; 303. Positioning hole; 304. Positioning bolt; 305. Third locking hole; 4. Positioning plate; 401. Second strip hole; 402. Second locking hole; 5. Drill bushing; 501. Guide hole; 502. Guide block; 503. Locking block; 504. Milling inclined surface; 505. Milling flat surface; 6. Corner cylinder; 7. Transition connecting block. 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 1-11As shown, a drilling and positioning fixture for an engine crankshaft inclined oil hole includes a base 1. Two parallel support blocks 2 are vertically arranged on the base 1. The longitudinal section of each support block 2 is a right-angled triangle, and the inclined surface of each support block 2 is inclined at 60°. A work plate 3 is arranged parallel to the inclined surface of each support block 2. The work plate 3 has a first strip-shaped hole 301 and a first locking hole 302. A drill sleeve 5 is fitted into the first locking hole 302. The drill sleeve 5 includes a locking block 503 and a guide block 502, the guide block 502 being cylindrical. The structure has a guide block 502 with the same diameter as the eccentric hole on the crank to be processed. The locking block 503 is matched with the first locking hole 302. The locking block 503 is located at one end of the guide block 502. The other end of the guide block 502 is provided with a milled inclined surface 504 facing the side wall. The angle between the milled inclined surface 504 and the central axis of the guide block 502 is 30 degrees. The milled inclined surface 504 is provided with a guide hole 501. The guide hole 501 is perpendicular to the milled inclined surface 504. The milled inclined surface 504 is set horizontally upward.

[0035] Since the inclined surface of the support block 2 is tilted at 60 degrees, and the drill sleeve 5 is installed on the working plate 3, the inclined angle of the milled inclined surface 504 on the drill sleeve 5 is 30 degrees. Therefore, after the drill sleeve 5 is installed, the milled inclined surface 504 is horizontal, and the guide hole 501 is vertical. The drill sleeve 5 is composed of a guide block 502 and a locking block 503. The guide block 502 is a cylindrical structure. The guide block 502 abuts against the inner wall of the eccentric hole of the crank. The two sides of the guide block 502 in the width direction will support the corresponding position of the eccentric hole, thereby preventing the crank from slipping off the inclined surface of the support block 2. The locking block 503 positions the drill sleeve 5 on the working plate 3.

[0036] The crank is positioned by placing the eccentric wheel of the end to be machined onto the drill sleeve 5 and inserting the other end into the first strip hole 301. The guide hole 501 is vertical, and the drill bit can directly machine the inclined oil hole from above along the vertical direction, transforming the inclined oil hole machining at an angle into a vertical machining of the inclined oil hole, reducing the machining difficulty. At the same time, the clamping and fixing of the crank is simple, reducing the workload of the workers and improving the machining efficiency. Moreover, the other end of the crank does not need to be clamped and fixed; it is only necessary to attach the disc-shaped part of the crank to the working plate 3, which further improves the clamping efficiency of the crank.

[0037] The surface of the working plate 3 has a slot, in which a positioning plate 4 is inserted. The positioning plate 4 has a second slot 401 at the position corresponding to the first slot 301, and a second slot 402 at the position corresponding to the first slot 302. The guide block 502 is inserted in the second slot 402.

[0038] By setting a positioning plate 4 on the surface of the work plate 3, the machining of different models of cranks can be met by replacing the positioning plate 4. The second clasp hole 402 corresponds to the first clasp hole 302, which facilitates the passage of the drill sleeve 5, while the second strip hole 401 facilitates the passage of the crank rod.

[0039] The locking block 503 has a cylindrical structure, and its side wall has a milled surface 505 along the length direction. The shape of the first locking hole 302 matches the shape of the locking block 503.

[0040] The milled plane 505 prevents the locking block 503 from rotating within the first locking hole 302, ensuring the positioning accuracy of the guide block 502 connected to the locking block 503 for the crank, while also ensuring accurate machining position.

[0041] It also includes a clamping mechanism. The working plate 3 has a third locking hole 305. A transition connecting block 7 is inserted into the third locking hole 305. The transition connecting block 7 is equipped with a corner cylinder 6. The corner cylinder 6 is a 90° corner cylinder. A strip-shaped pressure block is provided on the output shaft of the corner cylinder 6.

[0042] The angle cylinder 6 is installed on the support block 2 through the transition connection hole. When the output shaft of the angle cylinder 6 extends, it drives the pressure block to rotate and be vertically distributed. At this time, the finished crank can be removed and the crank to be processed can be clamped at the same time. When the output shaft of the angle cylinder 6 retracts, the pressure block rotates and is horizontally distributed at the same time, so that the pressure block presses the crank tightly on the work plate 3, further improving the clamping stability of the crank, preventing the crank from changing position during drilling, and further ensuring product quality.

[0043] The third locking hole 305 has a first strip hole 301 and a first locking hole 302 on both sides, and the output shaft of the corner cylinder 6 is connected to the middle of the pressure block.

[0044] An angle cylinder 6 is installed at the third chuck hole 305, which allows the cranks on both sides of the angle cylinder 6 to be clamped and positioned. The output shaft of the angle cylinder 6 is connected to the middle of the pressure block, so that when the pressure block rotates to a horizontal state, it can simultaneously press the cranks on both sides of the angle cylinder 6, and can clamp and position two cranks at the same time, thus improving processing efficiency.

[0045] The side of the working plate 3 has a positioning hole 303 that is connected to the first locating hole 302 at the position corresponding to the drill sleeve 5. The positioning hole 303 is provided with a positioning bolt 304, which abuts against the milling surface 505.

[0046] By increasing the contact area between the positioning bolt 304 and the locking block 503 through milling the plane 505, the structure of the positioning bolt 304 locking the locking block 503 becomes more stable, thereby improving the stability of the installation structure of the drill sleeve 5. This prevents the drill sleeve 5 from being vibrated and changing position during drilling, which would affect the positioning of the drill sleeve 5 on the crank, thus affecting the drilling accuracy and ultimately the quality of the product.

[0047] The base 1 is provided with a positioning groove 101. The positioning groove 101 facilitates the installation of the base 1 on the machine tool's worktable and also facilitates quick alignment of the installation position during installation, thereby improving the installation efficiency of the tooling.

[0048] In use, the base 1 is bolted to the machine tool workbench, the support block 2 is bolted to the base 1, the work plate 3 is bolted to the support block 2, the positioning block is bolted to the slot of the work plate 3, the locking block 503 of the drill sleeve 5 passes through the second locking hole 402 and is locked in the first locking hole 302, and then the locking block 503 is locked in the first locking hole 302 by the locking bolt against the milling surface 505, thereby fixing the position of the drill sleeve 5. The transition connecting hole is fixed to the third locking hole 305 by bolts, and then the corner cylinder 6 is fixed to the transition connecting block 7 by bolts. The pressure block is connected to the output shaft of the corner cylinder 6 by bolts.

[0049] The crankshaft portion of the crank to be machined for the inclined oil hole is passed through the first clasp hole 302 and the second clasp hole 402, while the crank disc portion is parallel to the work plate 3. This allows the eccentric hole on the crank to fit onto the drill sleeve 5, which positions the crank. Once the crank disc portion abuts against the work plate 3, the angle cylinder 6 is activated. The output shaft of the angle cylinder 6 retracts and rotates, causing the pressure block to move closer to the crank and rotate simultaneously. After rotating 90°, the pressure block abuts against the end face of the crank disc portion, pressing the crank firmly onto the work plate 3, thus completing the crank clamping and positioning. At this point, the crank... With a clamping angle of 30 degrees, inclined oil holes can be machined vertically. After machining, the angle cylinder 6 is activated, and the output shaft of the angle cylinder 6 extends and rotates, driving the pressure block away from the crank and rotating it to a vertical position. The interface removes the crank from the work plate 3, and then other cranks to be machined are placed. In the entire machining process, the worker only needs to place the crank, activate the angle cylinder 6, and activate the machine tool drill, which greatly reduces the worker's workload and improves machining efficiency. In addition, multiple cranks can be clamped at the same time and machined simultaneously, further improving machining efficiency.

[0050] In practical use, all the above connections use countersunk bolts to avoid bolt movement interference and affect machining accuracy.

[0051] 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 drilling and positioning fixture for an engine crankshaft inclined oil hole, characterized in that, The device includes a base on which two parallel support blocks are vertically mounted. The longitudinal section of each support block is a right-angled triangle, and the inclined surface of the support block is inclined at 60°. A working plate is mounted parallel to the inclined surface of the support block. The working plate has a first strip hole and a first locking hole. A drill sleeve is inserted into the first locking hole. The drill sleeve includes a locking block and a guide block. The guide block has a cylindrical structure, and its diameter is the same as the diameter of the eccentric hole on the crank to be processed. The locking block mates with the first locking hole and is located at one end of the guide block. The other end of the guide block has a milled inclined surface facing the side wall. The angle between the milled inclined surface and the central axis of the guide block is 30 degrees. A guide hole is provided on the milled inclined surface, and the guide hole is perpendicular to the milled inclined surface. The milled inclined surface is horizontally upward.

2. The drilling and positioning fixture for an engine crankshaft inclined oil hole according to claim 1, characterized in that, The surface of the working plate has a slot, in which a positioning plate is inserted. The positioning plate has a second slot corresponding to the position of the first slot and a second slot corresponding to the position of the first slot. The guide block is inserted into the second slot.

3. The drilling and positioning fixture for an engine crankshaft inclined oil hole according to claim 1, characterized in that, The card block has a cylindrical structure with milled planes on its sidewalls along the length direction, and the shape of the first card hole matches the shape of the card block.

4. The drilling and positioning fixture for an engine crankshaft inclined oil hole according to claim 1, characterized in that, It also includes a clamping mechanism. The working plate has a third locking hole, in which a transition connecting block is inserted. The transition connecting block is equipped with a corner cylinder, which is a 90° corner cylinder. The output shaft of the corner cylinder is equipped with a strip-shaped pressure block.

5. The drilling and positioning fixture for an engine crankshaft inclined oil hole according to claim 4, characterized in that, The third locking hole is provided with a first strip hole and a first locking hole on both sides, and the output shaft of the corner cylinder is connected to the middle of the pressure block.

6. The drilling and positioning fixture for an engine crankshaft inclined oil hole according to claim 3, characterized in that, The working plate has a positioning hole on its side corresponding to the position of the drill sleeve, which is connected to the first locating hole. A positioning bolt is provided in the positioning hole, and the positioning bolt abuts against the milling surface.

7. The drilling and positioning fixture for an engine crankshaft inclined oil hole according to claim 1, characterized in that, The base is provided with a positioning groove.

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