Auxiliary chip removal device for machining inclined oil hole of crankshaft

Abstract

The utility model discloses an auxiliary chip removal device for processing an inclined oil hole of a crankshaft, which is provided with a compressed air connector fixedly connected to the center of a pressing plate, the compressed air connector penetrates through the pressing plate and then is integrally connected with an exhaust pipe, and when the inclined oil hole of the crankshaft is drilled, the exhaust pipe is inserted into a straight oil hole of the crankshaft; the crankshaft compression device further comprises an air compressor communicated with the compressed air connector, and compressed air generated by the air compressor enters the inclined oil hole through the crankshaft straight oil hole. According to the utility model, the external compressed air pipeline is additionally connected with the straight oil hole communicated with the inclined oil hole, compressed air is used for assisting pressurization, and a cooling liquid water pump is matched, so that scrap iron generated when the inclined oil hole is machined is efficiently discharged, and the quality problems that a gun drill is likely to break and scratch a hole wall due to unsmooth chip removal and the like are effectively avoided.

Description

Technical Field

[0001] This utility model relates to the field of crankshaft machining technology, specifically to an auxiliary chip removal device for machining inclined oil holes in crankshafts. Background Technology

[0002] In actual production practice, cutting fluid pump pressure is often used to remove iron filings from deep holes. However, this pressure is clearly insufficient when machining crankshaft inclined oil holes. For example, in patent application number 201610563510.9, entitled "A Crankshaft Oil Hole Structure and Machining Method for Improving the Torsional Fatigue Strength of Crankshafts," an inclined oil hole is drilled one by one on each crank arm through a guide. The inclined oil hole penetrates the crank arm and is located on the plane jointly determined by the axial center lines of the connecting rod journal and the main journal, connecting the main journal straight oil hole and the connecting rod straight oil hole. The special structure and machining requirements of the crankshaft inclined oil hole make it difficult for the cutting fluid pump pressure to effectively remove iron filings. Poor chip removal is very likely to occur, and once this happens, it will have serious consequences. For example, the gun drill may break due to blockage by iron filings, and the broken gun drill may also scratch the hole wall, causing quality problems. Such a result clearly cannot meet actual usage needs, and will not only affect the product's performance and lifespan, but may also lead to delays in production schedules and increased costs. Utility Model Content

[0003] In order to solve the technical problems existing in the prior art, the present invention provides an auxiliary chip removal device for machining inclined oil holes of crankshafts.

[0004] To achieve the above objectives, this utility model provides the following technical solution: an auxiliary chip removal device for machining crankshaft inclined oil holes, comprising a compressed air connector fixedly connected to the center of a pressure plate, the compressed air connector being integrally formed with an exhaust pipe after passing through the pressure plate, the exhaust pipe being inserted into the crankshaft straight oil hole when drilling the crankshaft inclined oil hole, and being fixed by clamping the pressure plate to the circumferential surface of the crankshaft, and also comprising an air compressor connected to the compressed air connector, the compressed air generated by the air compressor entering the inclined oil hole through the crankshaft straight oil hole.

[0005] Preferably, the pressure plate is a flexible structure made of rubber to accommodate crankshafts of different diameters.

[0006] Preferably, the exhaust pipe has a tapered structure that is wider at the top and narrower at the bottom to accommodate straight oil holes of different diameters.

[0007] Preferably, flexible connecting strips are integrally formed and connected to both ends of the pressure plate along its length. The width of the flexible connecting strips is smaller than that of the pressure plate. After the entire pressure plate is fitted onto the circumferential surface of the crankshaft, it is fixed by connecting the ends of the two flexible connecting strips.

[0008] Preferably, the ends of the two flexible connecting strips are respectively connected to a first mating plate and a second mating plate. The center of the first mating plate is integrally connected to a threaded tube, while the center of the second mating plate is rotatably connected to a threaded rod. Two limiting rings are fixed on the circumferential surface of the threaded rod at the position where it connects with the second mating plate. The threaded rod is limited by the two limiting rings and the second mating plate in the axial direction of the threaded rod. The threaded rod can be threadedly connected to the threaded tube on the first mating plate.

[0009] Preferably, the second mating plate is fixedly connected to the flexible connecting strip, while the first mating plate is slidably connected to the flexible connecting strip, and the first mating plate can also remain relatively stationary with the flexible connecting strip through a limiting and squeezing structure.

[0010] Preferably, a sliding sleeve is slidably installed on the outside of the flexible connecting strip, the first mating plate is fixedly connected to the sliding sleeve, and an extrusion plate is rotatably installed on the side of the sliding sleeve facing away from the first mating plate. The inner surface of the extrusion plate is evenly covered with protrusions. The sliding sleeve, extrusion plate and protrusions cooperate to form a limiting extrusion structure.

[0011] Preferably, a limiting plate is fixed to the end of the flexible connecting strip connected to the first docking plate to limit the position of the first docking plate.

[0012] Compared with the prior art, this utility model provides an auxiliary chip removal device for machining inclined oil holes in crankshafts, which has the following beneficial effects:

[0013] (1) This application improves the chip removal efficiency of the inclined oil hole by adding an external compressed air pipeline connected to a straight oil hole, using compressed air to assist in pressurization, and cooperating with a coolant pump. Compared with the existing technology that relies solely on the pressure of the cutting fluid pump to remove chips, this patent can more efficiently remove the chips generated during the machining of the inclined oil hole, effectively avoiding quality problems such as gun drill breakage and hole wall scratches that are very likely to occur due to poor chip removal.

[0014] (2) The efficient chip removal method reduces downtime and adjustment time caused by chip removal problems, greatly improving production efficiency. At the same time, it reduces rework costs and resource waste caused by quality problems, giving enterprises a greater advantage in fierce market competition. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the present invention and form part of the specification. They are used together with the embodiments of the present invention to explain the present invention, but do not constitute a limitation thereof. In the drawings:

[0016] Figure 1 This is a schematic diagram of the overall structure of an auxiliary chip removal device for machining inclined oil holes in a crankshaft, as proposed in an embodiment.

[0017] Figure 2 This is a front view of an auxiliary chip removal device for machining inclined oil holes in a crankshaft, as proposed in an embodiment.

[0018] Figure 3 This is a schematic diagram of the installation of the first docking plate on the flexible connecting strip in the embodiment;

[0019] Figure 4 This is a schematic diagram of the first mating plate in the embodiment with the pressing plate in the open state;

[0020] Figure 5 This is a schematic diagram showing the connection between the threaded rod and the second mating plate in the embodiment.

[0021] In the diagram: 1. Pressure plate; 2. Compressed air connector; 3. Exhaust pipe; 4. Flexible connecting strip; 5. First mating plate; 6. Second mating plate; 7. Threaded rod; 8. Limiting plate; 9. Threaded pipe; 10. Sliding sleeve; 11. Extrusion plate; 12. Spike; 13. Limiting ring; 14. Control lever. Detailed Implementation

[0022] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. The components of the embodiments of the present invention described and shown in the accompanying drawings can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the present invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0023] This embodiment proposes an auxiliary chip removal device for machining inclined oil holes in crankshafts, such as... Figures 1 to 5As shown, it includes a compressed air connector 2 fixedly connected to the center of the pressure plate 1. The compressed air connector 2 passes through the pressure plate 1 and is integrally connected to an exhaust pipe 3. When drilling the inclined oil hole of the crankshaft, the exhaust pipe 3 is inserted into the straight oil hole of the crankshaft and fixed by clamping it to the circumference of the crankshaft through the pressure plate 1. The compressed air connector 2 is connected to an external air compressor. The compressed air generated by the air compressor enters the inclined oil hole through the straight oil hole of the crankshaft. The strong pressure of the compressed air and the cutting fluid pressure of the machine tool itself work together to form a strong chip removal force, so that the chips can be smoothly discharged from the inclined oil hole of the crankshaft. It should be noted that, according to the crankshaft machining process, the straight oil hole on the main journal and the oblique oil hole on the connecting rod journal are generally drilled separately using a gun drill. However, it is essential to ensure that at least one-third of the cross-section of the two oil holes is connected inside the crankshaft. Therefore, the use of this device for chip removal from the oblique oil hole is conditional. The condition is that the straight oil hole of the crankshaft has been machined. Then, with the help of the main journal straight oil hole (located in the middle area of ​​the entire oblique oil hole), after the oblique oil hole and the main journal straight oil hole are connected, compressed air is forced into the straight oil hole to work with the cutting fluid to complete the chip removal, thus avoiding chip removal difficulties caused by the oblique oil hole being machined to be too long or too deep.

[0024] In actual operation, the crankshaft model is different and its diameter is also different. In order to make the device applicable to the processing of crankshafts of different specifications, this embodiment preferably sets the pressure plate 1 as a flexible structure, specifically a thin rubber plate.

[0025] Furthermore, the initial size of the oil holes on the crankshaft will also be different. After the compressed air enters the straight oil hole, the exhaust pipe 3 and the straight oil hole need to have good sealing performance. Based on the above considerations, in this embodiment, the exhaust pipe 3 is a tapered structure with a larger top and a smaller bottom to accommodate straight oil holes of different diameters.

[0026] After the exhaust pipe 3 is inserted into the straight oil hole, the first thing to consider is the firmness of the connection between the exhaust pipe 3 and the straight oil hole. This is directly related to whether the compressed air can enter the straight oil hole normally. The reliability of the connection between the exhaust pipe 3 and the straight oil hole depends entirely on the pressure plate 1. Therefore, in this embodiment, flexible connecting strips 4 are integrally formed and connected to both ends of the pressure plate 1 along its length. The width of the flexible connecting strips 4 is smaller than that of the pressure plate 1. After the entire pressure plate 1 is clamped on the circumferential surface of the crankshaft, it is fixed by connecting the ends of the two flexible connecting strips 4.

[0027] Specifically, the ends of the two flexible connecting strips 4 are respectively connected to a first mating plate 5 and a second mating plate 6. The center of the first mating plate 5 is integrally connected to a threaded tube 9, while the center of the second mating plate 6 is rotatably connected to a threaded rod 7. Two limiting rings 13 are fixed at the position where the threaded rod 7 connects to the second mating plate 6 on its circumference. The threaded rod 7 is limited by the two limiting rings 13 and the second mating plate 6 in the axial direction of the threaded rod 7. The threaded rod 7 can be threadedly connected to the threaded tube 9 on the first mating plate 5. When it is necessary to fix the compressed air connector 2 or the exhaust pipe 3, the ends of the two flexible connecting strips 4 are pulled close to each other on the crankshaft, and then the threaded rod 7 and the threaded tube 9 are aligned. The operating lever 14 at the tail of the threaded rod 7 is used to drive it to rotate. Through the thread action, the first mating plate 5 and the second mating plate 6 can be driven to move towards each other, so that the pressure plate 1 is firmly clamped on the surface of the crankshaft, and the compressed air connector 2 or the exhaust pipe 3 can be fixed at the same time.

[0028] Furthermore, since the pressure plate 1 is applicable to crankshafts of different specifications, the distance between the first mating plate 5 and the second mating plate 6 must be adjustable. Therefore, in this embodiment, the second mating plate 6 is fixedly connected to the flexible connecting strip 4, while the first mating plate 5 is slidably connected to the flexible connecting strip 4. The first mating plate 5 can also remain relatively stationary with the flexible connecting strip 4 through a limiting and pressing structure. The position of the first mating plate 5 on the flexible connecting strip 4 is adjusted according to the diameter of the crankshaft. After the position is adjusted appropriately, the first mating plate 5 must also remain relatively stationary with the flexible connecting strip 4 to ensure that the pressure plate 1 is clamped on the surface of the crankshaft.

[0029] A sliding sleeve 10 is slidably mounted on the outside of the flexible connecting strip 4. The first mating plate 5 is fixedly connected to the sliding sleeve 10. A pressing plate 11 is rotatably mounted on the side of the sliding sleeve 10 facing away from the first mating plate 5. The inner surface of the pressing plate 11 is evenly covered with protrusions 12. The sliding sleeve 10, the pressing plate 11, and the protrusions 12 cooperate to form a limiting pressing structure. When it is necessary to adjust the position of the first mating plate 5 on the flexible connecting strip 4, the pressing plate 11 is opened, and all the protrusions 12 disengage from the flexible connecting strip 4. At this time, the sliding sleeve 10 can be positioned relative to the flexible connecting strip 4. After the strip 4 slides and the adjustment is completed, the extrusion plate 11 presses against the sliding sleeve 10. All the protrusions 12 can extrude on the flexible connecting strip 4, thereby increasing the friction between the flexible connecting strip 4 and the extrusion plate 11. Since the opening direction of the extrusion plate 11 is perpendicular to the sliding direction of the sliding sleeve 10, and the material setting at the point where the extrusion plate 11 contacts the sliding sleeve 10 during pressing makes the two have a large friction, the extrusion plate 11 will not easily open during the threaded connection of the threaded rod 7 and the threaded tube 9.

[0030] In addition, since the first docking plate 5 in this embodiment can slide relative to the flexible connecting strip 4, in order to prevent the first docking plate 5 from slipping off the flexible connecting strip 4, a limiting plate 8 is fixed at the end of the flexible connecting strip 4 to limit the first docking plate 5.

[0031] In the description of this utility model, the terms "first," "second," "another," and "yet another" 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. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more features. In the description of embodiments of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "connected" and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances. Furthermore, in the description of this utility model, unless otherwise stated, "multiple" means two or more.

[0033] Although embodiments of the present invention have been shown and described, those skilled in the art will understand that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the claims and their equivalents.

Claims

1. A chip removal device for machining inclined oil holes in crankshafts, characterized in that: It includes a compressed air connector (2) fixedly connected to the center of the pressure plate (1). The compressed air connector (2) passes through the pressure plate (1) and is integrally connected to an exhaust pipe (3). When drilling the inclined oil hole of the crankshaft, the exhaust pipe (3) is inserted into the straight oil hole of the crankshaft and fixed by clamping it to the circumference of the crankshaft through the pressure plate (1). It also includes an air compressor connected to the compressed air connector (2). The compressed air generated by the air compressor enters the inclined oil hole through the straight oil hole of the crankshaft.

2. The auxiliary chip removal device for machining inclined oil holes of crankshafts according to claim 1, characterized in that: The pressure plate (1) is a flexible structure made of rubber to accommodate crankshafts of different diameters.

3. The auxiliary chip removal device for machining inclined oil holes of crankshafts according to claim 2, characterized in that: The exhaust pipe (3) has a tapered structure that is larger at the top and smaller at the bottom to accommodate straight oil holes of different diameters.

4. The auxiliary chip removal device for machining inclined oil holes of crankshafts according to claim 2 or 3, characterized in that: The pressure plate (1) is integrally formed with flexible connecting strips (4) at both ends along its length. The width of the flexible connecting strips (4) is smaller than that of the pressure plate (1). After the entire pressure plate (1) is fitted onto the circumferential surface of the crankshaft, it is fixed by connecting the ends of the two flexible connecting strips (4).

5. The auxiliary chip removal device for machining inclined oil holes of crankshafts according to claim 4, characterized in that: The ends of the two flexible connecting strips (4) are respectively connected to a first mating plate (5) and a second mating plate (6). The center of the first mating plate (5) is integrally connected to a threaded tube (9), while the center of the second mating plate (6) is rotatably connected to a threaded rod (7). Two limiting rings (13) are fixed at the position where the threaded rod (7) connects to the second mating plate (6). The threaded rod (7) is limited by the two limiting rings (13) and the second mating plate (6) in the axial direction of the threaded rod (7). The threaded rod (7) can be threadedly connected to the threaded tube (9) on the first mating plate (5).

6. The auxiliary chip removal device for machining inclined oil holes of crankshafts according to claim 5, characterized in that: The second mating plate (6) is fixedly connected to the flexible connecting strip (4), while the first mating plate (5) is slidably connected to the flexible connecting strip (4), and the first mating plate (5) can also remain relatively stationary with the flexible connecting strip (4) through the limiting and squeezing structure.

7. The auxiliary chip removal device for machining inclined oil holes of crankshafts according to claim 6, characterized in that: A sliding sleeve (10) is slidably installed on the outside of the flexible connecting strip (4). The first docking plate (5) is fixedly connected to the sliding sleeve (10). A pressing plate (11) is rotatably installed on the side of the sliding sleeve (10) facing away from the first docking plate (5). The inner surface of the pressing plate (11) is evenly covered with protrusions (12). The sliding sleeve (10), the pressing plate (11), and the protrusions (12) cooperate to form a limiting pressing structure.

8. The auxiliary chip removal device for machining inclined oil holes of crankshafts according to claim 6 or 7, characterized in that: A limit plate (8) is fixed at the end of the flexible connecting strip (4) connected to the first docking plate (5) to limit the first docking plate (5).

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