Crankshaft machining dividing device

Abstract

The utility model discloses a crankshaft machining dividing device, which belongs to the technical field of functional components of numerical control machine tools, and comprises a base, a fixed seat is fixedly mounted on one side of the base, a sliding seat is mounted on one side of the base in a sliding manner, and the sliding seat is electrically connected with the device through a drag chain cable. And rotary table mechanisms are arranged at the top ends of the fixed seat and the sliding seat. Due to the fact that the rotary table mechanism is arranged, the rotary table mechanism adopts the direct drive motor, and the rotary table mechanism has the advantages of being high in response speed during linkage machining, capable of meeting machining of various complex curved surfaces, free of worms and gear transmission pieces, free of abrasion and long in service life. Meanwhile, distortion generated during machining of long and thin parts such as the crankshaft is reduced, the crankshaft is installed through a special hydraulic chuck, a center is arranged in the middle of the chuck, and the center abuts against the workpiece to complete positioning during installation.

Description

Technical Field

[0001] This utility model relates to the technical field of functional components of CNC machine tools, and in particular to a crankshaft machining indexing device. Background Technology

[0002] The crankshaft is a key component of an engine. It has a complex shape, poor rigidity, high precision requirements, and complex machining processes. The machining process requires turning, milling, drilling, and other operations, as well as equipment such as lathes, machining centers, and special machines, and complex tooling such as eccentric fixtures. The process is complicated and the machining quality is difficult to guarantee. The crankshaft converts the reciprocating linear motion of the piston into rotational motion, thereby outputting power. In this process, the crankshaft is subjected to complex alternating loads, including various forces such as torque, bending moment, and torque. Therefore, the quality and performance of the crankshaft directly affect the engine's working efficiency, reliability, and service life.

[0003] Traditional crankshaft machining technology requires multiple pieces of equipment to work together and multiple processes to complete the machining. Each process requires clamping, positioning, cutting and other operations, which takes a long time. Especially in mass production, the machining quality is difficult to guarantee. Once the product model changes, it is necessary to change the tools, fixtures and adjust the process parameters. It is not suitable for small-batch, multi-variety crankshaft machining.

[0004] Therefore, there is an urgent need to provide a crankshaft machining indexing device to solve the above problems. Utility Model Content

[0005] The technical problem to be solved by this utility model is to overcome the shortcomings of the prior art and provide a crankshaft machining indexing device.

[0006] To solve the above-mentioned technical problems, the present invention provides a crankshaft machining indexing device, including a base, a fixed seat fixedly installed on one side of the base, a sliding seat slidably installed on one side of the base, the sliding seat being electrically connected to the device via a drag chain cable, a turntable mechanism being provided at the top of both the fixed seat and the sliding seat, two center frame mechanisms being provided at the top of the base, and a moving mechanism being provided on one side of each center frame mechanism.

[0007] Through the above technical solution, the sliding base is electrically connected to the device via a drag chain cable, ensuring stable transmission of power and signals during the sliding process.

[0008] The present invention is further configured such that: the turntable mechanism includes a turntable body fixed to the top of the fixed base, a torque motor is fixedly installed inside the turntable body, and an encoder is fixedly installed on one side of the torque motor.

[0009] Through the above technical solution, the turntable body is directly driven by a high-torque motor, and the encoder is used as the feedback signal, which can achieve high-precision rotational positioning. The turntable body is equipped with a locking mechanism, which can lock the spindle at any position and withstand greater cutting torque.

[0010] The present invention is further configured such that: a rotary cylinder is fixedly installed at one end of the turntable body; a bearing is rotatably installed between the turntable body and the torque motor; a tie rod is fixedly installed inside the output shaft of the torque motor; the tie rod is rotatably sealed to one end of the rotary cylinder; and a hydraulic chuck is fixedly installed at the other end of the tie rod.

[0011] Through the above technical solution, the turntable body realizes automatic clamping and release of workpieces through rotary cylinders and hydraulic chucks. The chuck has a fixed center at its center, which is used to position the workpiece.

[0012] The present invention is further configured such that: the central frame mechanism includes a first slide table slidably installed inside the base, a second slide table slidably installed inside the base, and a lifting cylinder is fixedly installed on one side of both the first slide table and the second slide table.

[0013] The above technical solution uses the first and second slides as auxiliary supports near the cutting position to solve the deformation problem caused by insufficient crankshaft rigidity.

[0014] The present invention is further configured such that: a cross arm is fixedly installed at one end of the lifting rod of the lifting cylinder; two symmetrically distributed side arms are rotatably installed inside the first slide; one end of each of the two side arms is rotatably connected to one end of the lifting rod of the lifting cylinder; and a roller is rotatably installed inside the cross arm.

[0015] The above technical solution uses a lifting cylinder to drive the internal cam to move. The cam controls the horizontal arm to move up and down and the side arm to swing. When the horizontal arm and the side arm move in tandem, the generatrix of the upper roller is always tangent to the outer circle of the crankshaft. Under the action of hydraulic pressure, it supports the crankshaft.

[0016] The present invention is further configured such that: the moving mechanism includes a positioning motor fixed to one side of the first slide, the output shaft of the positioning motor is fixedly connected to a gear through a reducer, a rack is fixedly installed at the top of the base, and the outer surface of the gear meshes with one side of the rack.

[0017] Through the above technical solution, the positioning motor drives the gear to rotate through the reducer, so that the gear drives the first slide to move through the base via the rack.

[0018] The present invention is further configured such that: a locking cylinder is fixedly installed inside the first slide, and a locking plate is fixedly installed on the locking cylinder through a piston rod.

[0019] Through the above technical solution, the locking cylinder drives the locking plate to hydraulically lock the base through the piston rod.

[0020] The beneficial effects of this utility model are as follows:

[0021] 1. This utility model features a turntable mechanism with a direct-drive motor, which offers fast response during simultaneous machining, meets the requirements for machining various complex curved surfaces, eliminates the need for worm gears and gear transmissions, and boasts advantages such as wear-free operation and long service life. The rotary drive utilizes two turntables for dual-drive operation, doubling the driving torque while reducing torsional deformation of slender parts such as crankshafts during machining. The crankshaft is mounted using a dedicated hydraulic chuck with a center in the center. During rotation, the center presses against the workpiece to complete positioning, while the jaws retract to clamp the workpiece. The jaws can float radially, serving only a clamping function and will not interfere with the centering of the center.

[0022] 2. This utility model, by providing a central support mechanism and a moving mechanism, allows two slides to move independently, with each slide's stroke overlapping and locking at any position. No vibration is generated during cutting. Two hydraulic central supports provide auxiliary support. When machining the first and second crankshaft diameters (left and right), the machining position is close to the chuck, ensuring machining accuracy. When machining the second and third crankshaft diameters (left and right), the two central supports support the first and second crankshaft diameters, ensuring the rigidity of the machining position and providing constant support near the cutting position, thus solving the problem of insufficient crankshaft rigidity. Attached Figure Description

[0023] Figure 1 This is a front view of the present invention;

[0024] Figure 2 This is a structural diagram of the turntable mechanism of this utility model;

[0025] Figure 3 This is a structural diagram of the central frame mechanism of this utility model;

[0026] Figure 4 This is a structural diagram of the moving mechanism of this utility model.

[0027] In the diagram: 1. Base; 2. Fixed seat; 3. Sliding seat; 4. Drag chain cable; 5. Turntable mechanism; 501. Turntable body; 502. Torque motor; 503. Encoder; 504. Rotary cylinder; 505. Bearing; 506. Tie rod; 507. Hydraulic chuck; 6. Center frame mechanism; 601. First slide; 602. Second slide; 603. Lifting cylinder; 604. Horizontal arm; 605. Side arm; 7. Moving mechanism; 701. Positioning motor; 702. Reducer; 703. Gear; 704. Rack; 705. Locking cylinder; 706. Piston rod; 707. Locking plate. Detailed Implementation

[0028] The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings, so that the advantages and features of the present invention can be more easily understood by those skilled in the art, thereby making a clearer and more definite definition of the scope of protection of the present invention.

[0029] Please see Figures 1-4 A crankshaft machining indexing device includes a base 1, a fixed seat 2 fixedly mounted on one side of the base 1, and a sliding seat 3 slidably mounted on one side of the base 1. The sliding seat 3 is electrically connected to the device via a drag chain cable 4. A turntable mechanism 5 is provided at the top of both the fixed seat 2 and the sliding seat 3. The turntable mechanism 5 includes a turntable body 501 fixedly mounted on the top of the fixed seat 2. A torque motor 502 is fixedly mounted inside the turntable body 501. An encoder 503 is fixedly mounted on one side of the torque motor 502. A rotary cylinder 504 is fixedly mounted at one end of the turntable body 501. A bearing 505 is rotatably mounted between the turntable body 501 and the torque motor 502. A tie rod 506 is fixedly mounted inside the output shaft of the torque motor 502. One end of the pull rod 506 is rotary sealed with the rotary cylinder 504, and the other end of the pull rod 506 is fixedly installed with a hydraulic chuck 507. Through the above technical solution, the sliding seat 3 is electrically connected to the device through the drag chain cable 4 to ensure stable transmission of power and signals during the sliding process. The turntable body 501 is directly driven by a high torque motor 502, and the encoder 503 provides feedback signals, which can achieve high-precision rotational positioning. The turntable body 501 is equipped with a locking mechanism, which can lock the spindle at any position and withstand greater cutting torque. The turntable body 501 realizes automatic clamping and loosening of the workpiece through the rotary cylinder 504 and the hydraulic chuck 507. The chuck has a fixed center at the center, which realizes workpiece positioning.

[0030] like Figure 3 As shown, the top of the base 1 is provided with two central frame mechanisms 6. The central frame mechanism 6 includes a first slide 601 slidably installed inside the base 1 and a second slide 602 slidably installed inside the base 1. A lifting cylinder 603 is fixedly installed on one side of both the first slide 601 and the second slide 602. A cross arm 604 is fixedly installed at one end of the lifting rod of the lifting cylinder 603. Two symmetrically distributed side arms 605 are rotatably installed inside the first slide 601. One end of each side arm 605 is rotatably connected to one end of the lifting rod of the lifting cylinder 603. A roller is rotatably installed inside the cross arm 604. The first slide 601 and the second slide 602 are used as auxiliary supports near the cutting position to solve the deformation problem caused by insufficient crankshaft rigidity. The lifting cylinder 603 drives the internal cam to move. The cam controls the cross arm 604 to move up and down and the side arm 605 to swing. When the cross arm 604 and the side arm 605 are linked, the generatrix of the upper roller is always tangent to the outer circle of the crankshaft. Under the action of hydraulic pressure, it supports the crankshaft.

[0031] like Figure 4As shown, a moving mechanism 7 is provided on one side of the central frame mechanism 6. The moving mechanism 7 includes a positioning motor 701 fixed to one side of the first slide 601. The output shaft of the positioning motor 701 is fixedly connected to a gear 703 through a reducer 702. A rack 704 is fixedly installed on the top of the base 1. The outer surface of the gear 703 meshes with one side of the rack 704. A locking cylinder 705 is fixedly installed inside the first slide 601. A locking plate 707 is fixedly installed on the locking cylinder 705 through a piston rod 706. The positioning motor 701 drives the gear 703 to rotate through the reducer 702, so that the gear 703 drives the first slide 601 to move through the base 1 through the rack 704. The locking cylinder 705 drives the locking plate 707 to hydraulically lock the base 1 through the piston rod 706.

[0032] In use, this invention uses a fixed base 2 and a sliding base 3 to horizontally mount the crankshaft along its axis. The sliding base 3 is electrically connected to the device via a drag chain cable 4, ensuring stable power and signal transmission during sliding. The turntable 501 automatically clamps and releases both ends of the crankshaft via a rotary cylinder 504 and a hydraulic chuck 507. The positioning motor 701 drives the gear 703 to rotate via a reducer 702, causing the gear 703 to drive the first slide 601 to move across the base 1 via a rack 704. After the first slide 601 is in position, the locking cylinder 705 drives the locking plate 707 via a piston rod 706 to hydraulically lock the base 1. The system accurately positions the crankshaft according to its length and the required support position of the center frame, enabling the processing of workpieces of different sizes. Similarly, the first slide... The second slide 601 and the second slide 602 serve as auxiliary supports near the cutting position to solve the deformation problem caused by insufficient crankshaft rigidity. The internal cam is driven to move by the lifting cylinder 603. The cam controls the up and down movement of the horizontal arm 604 and the swing of the side arm 605. When the horizontal arm 604 and the side arm 605 are linked, the generatrix of the upper roller is always tangent to the outer circle of the crankshaft. Under the action of hydraulic pressure, it supports the crankshaft. The turntable body 501 is directly driven by a high torque motor 502, and the encoder 503 provides feedback signals, which can achieve high-precision rotational positioning. The turntable body 501 is equipped with a locking mechanism, which can lock the spindle at any position and withstand greater cutting torque. Thus, the two turntables achieve dual-drive rotary motion, driving the crankshaft to achieve arbitrary angle rotation indexing. Linked with the main machine, all the hole surfaces of the crankshaft are machined in one clamping.

[0033] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A dividing device for crankshaft machining, comprising a base (1), characterised in that: A fixed seat (2) is fixedly installed on one side of the base (1), and a sliding seat (3) is slidably installed on one side of the base (1). The sliding seat (3) is electrically connected to the device through a drag chain cable (4). A turntable mechanism (5) is provided at the top of both the fixed seat (2) and the sliding seat (3). Two central frame mechanisms (6) are provided at the top of the base (1), and a moving mechanism (7) is provided on one side of the central frame mechanism (6).

2. A crankshaft indexing device as claimed in claim 1, wherein: The turntable mechanism (5) includes a turntable body (501) fixed to the top of the fixed base (2), a torque motor (502) is fixedly installed inside the turntable body (501), and an encoder (503) is fixedly installed on one side of the torque motor (502).

3. A crankshaft indexing device as claimed in claim 2, wherein: A rotary cylinder (504) is fixedly installed at one end of the turntable body (501). A bearing (505) is rotatably installed between the turntable body (501) and the torque motor (502). A tie rod (506) is fixedly installed inside the output shaft of the torque motor (502). The tie rod (506) is rotatably sealed to one end of the rotary cylinder (504). A hydraulic chuck (507) is fixedly installed at the other end of the tie rod (506).

4. A crankshaft indexing device as claimed in claim 1, wherein: The central frame mechanism (6) includes a first slide (601) slidably installed inside the base (1), and a second slide (602) slidably installed inside the base (1). A lifting cylinder (603) is fixedly installed on one side of both the first slide (601) and the second slide (602).

5. A crankshaft indexing device as claimed in claim 4, wherein: A cross arm (604) is fixedly installed at one end of the lifting rod of the lifting cylinder (603). Two symmetrically distributed side arms (605) are rotatably installed inside the first slide (601). One end of each of the two side arms (605) is rotatably connected to one end of the lifting rod of the lifting cylinder (603). A roller is rotatably installed inside the cross arm (604).

6. A crankshaft indexing apparatus as claimed in claim 4, wherein: The moving mechanism (7) includes a positioning motor (701) fixed to one side of the first slide (601). The output shaft of the positioning motor (701) is fixedly connected to a gear (703) through a reducer (702). A rack (704) is fixedly installed on the top of the base (1). The outer surface of the gear (703) meshes with one side of the rack (704).

7. A crankshaft indexing device as claimed in claim 6, wherein: A locking cylinder (705) is fixedly installed inside the first slide (601), and a locking plate (707) is fixedly installed on the locking cylinder (705) through a piston rod (706).

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