Clamping device for crankshaft machining

Abstract

The utility model relates to the technical field of clamping devices, and particularly discloses a clamping device for crankshaft machining, the clamping device comprises a base, a fixed seat, a movable seat, a driving mechanism and a rotating mechanism, the fixed seat is arranged on the base, a rotating cylinder is transversely arranged on the fixed seat, and the rotating cylinder is rotatably connected to the fixed seat around the axis of the rotating cylinder; a first positioning assembly for fixing a crankshaft is arranged on the rotating cylinder; the movable seat is connected to the base in a sliding mode in the transverse direction, and the driving mechanism is arranged on the base and used for driving the movable seat to move. A rotating table is rotationally connected to the movable base, the rotating axis of the rotating table is coaxial with the axis of the rotating cylinder, a second positioning assembly is arranged on the rotating table, and the rotating mechanism is arranged on the movable base and used for driving the rotating table to rotate. The crankshaft drilling device has the effect that the problem that when drilling operation needs to be conducted on the crankshaft at different angles, the crankshaft needs to be repeatedly disassembled and assembled, and use is inconvenient is solved.

Description

Technical Field

[0001] This application relates to the field of clamping device technology, and in particular to a clamping device for crankshaft machining. Background Technology

[0002] The crankshaft is the most important component in an engine. It bears the force transmitted from the connecting rod and converts it into torque, which is then output through the crankshaft to drive other accessories on the engine. After forging, the crankshaft needs to undergo drilling, grinding, and polishing, during which it is usually clamped and fixed in place.

[0003] A crankshaft machining positioning fixture is proposed in related technologies, including a mounting table, a fixed seat, a movable seat, and a movable component. The fixed seat is fixedly mounted on the mounting table and is equipped with a three-jaw chuck. The movable seat is slidably connected to the mounting table via the movable component. When fixing the crankshaft, one end of the crankshaft is clamped and fixed on the three-jaw chuck. Then, the movable component drives the movable seat to approach the crankshaft until the movable seat presses against the crankshaft, thus fixing the crankshaft.

[0004] Regarding the aforementioned technologies, although the positioning fixture can fix the crankshaft, when drilling operations are required at different angles on the crankshaft, the crankshaft needs to be repeatedly disassembled and reassembled in order to adjust the crankshaft at different angles, which is inconvenient to use. Utility Model Content

[0005] To address the inconvenience of repeatedly disassembling and reassembling the crankshaft when drilling at different angles, this application provides a crankshaft clamping device.

[0006] The clamping device for crankshaft machining provided in this application adopts the following technical solution:

[0007] A crankshaft machining clamping device includes a base, a fixed seat, a movable seat, a drive mechanism, and a rotating mechanism. The fixed seat is disposed on the base, and a rotating cylinder is provided on the fixed seat along a transverse direction. The rotating cylinder is rotatably connected to the fixed seat about its own axis, and a first positioning component for fixing the crankshaft is provided on the rotating cylinder. The movable seat is slidably connected to the base along a transverse direction, and the drive mechanism is disposed on the base for driving the movable seat to move. A rotating table is rotatably connected to the movable seat, and the rotation axis of the rotating table is coaxial with the axis of the rotating cylinder. A second positioning component is provided on the rotating table, and the rotating mechanism is disposed on the movable seat for driving the rotating table to rotate.

[0008] By adopting the above technical solution, the crankshaft can be stably clamped and adjusted in multiple directions. Specifically, when machining the crankshaft, one end of the crankshaft is first fixed to the rotating cylinder using the first positioning component. Then, the drive mechanism is activated to move the movable seat laterally along the slide rail on the base, so that the second positioning component gradually approaches the other end of the crankshaft and further limits its position. During this process, since the axes of the rotating table and the rotating cylinder are coaxial, the crankshaft can maintain good concentricity throughout the clamping process. When it is necessary to change the angle of the crankshaft to adapt to different machining requirements, the rotating mechanism can drive the rotating table to rotate precisely relative to the movable seat, thereby completing the spatial attitude adjustment of the crankshaft. The entire operation process is smooth, efficient, and precise in positioning, eliminating the need for repeated disassembly and assembly of the crankshaft. This improves the problem of repeated disassembly and assembly of the crankshaft when drilling at different angles is required, which is inconvenient.

[0009] Optionally, the first positioning assembly includes multiple positioning components, which are evenly arranged around the axis of the rotating cylinder. Each positioning component includes a crank arm, which includes an integrally formed first connecting rod and a second connecting rod connected at an angle. The middle part of the crank arm is rotatably connected to the inner wall of the rotating cylinder. The side wall of the first connecting rod is used to abut against the end face of the crankshaft, and the end face of the second connecting rod is used to abut against the peripheral wall of the crankshaft.

[0010] By adopting the above technical solution, the crankshaft is stably fixed on the clamping device. The design of multiple positioning components evenly distributed around the axis of the rotating cylinder can ensure balanced force and avoid displacement caused by uneven force on the crankshaft. The crank arm has a clever structural design. The first connecting rod abuts against the end face of the crankshaft to provide axial limit, while the second connecting rod abuts against the peripheral wall of the crankshaft to achieve radial limit. The two work together to effectively prevent the crankshaft from shaking or falling off during the processing, thereby improving processing accuracy and safety.

[0011] Optionally, a clamping block is rotatably connected to the end of the second connecting rod, and the side wall of the clamping block is provided with anti-slip texture.

[0012] By adopting the above technical solution, the clamping block can rotate around the end of the second connecting rod, thereby adapting to crankshaft surfaces of different shapes and sizes and automatically adjusting the optimal contact angle during clamping. At the same time, the anti-slip texture on the side wall of the clamping block increases the friction between it and the crankshaft, effectively preventing the crankshaft from loosening or shifting during processing, improving clamping stability, and ensuring crankshaft processing accuracy. In addition, this design also reduces the risk of crankshaft surface damage caused by slippage and extends the service life of the equipment.

[0013] Optionally, the rotating mechanism includes a worm gear, a worm, and a handwheel. The worm gear is coaxially connected to the rotating platform, the worm is rotatably connected to the movable seat, the worm gear meshes with the worm, and the handwheel is connected to one end of the worm.

[0014] By adopting the above technical solution, the manual and precise adjustment function of the rotary table in the crankshaft machining clamping device is realized. Specifically, the cooperation between the worm gear and the worm can convert the rotational motion of the handwheel into the stable rotation of the rotary table, thereby facilitating the operator to make precise adjustments to the angle of the crankshaft. The structure is simple and compact, easy to manufacture and maintain, and effectively improves the operational convenience and work efficiency in the crankshaft machining process.

[0015] Optionally, a gear is coaxially connected to the worm gear, a toothed block is slidably connected to the movable seat, a compression spring is connected to the side of the toothed block away from the gear, the other end of the compression spring is connected to the movable seat, and the compression spring tends to make the toothed block mesh with the gear.

[0016] By adopting the above technical solution, when the worm needs to be fixed, the compression spring pushes the tooth block to move towards the gear, so that the tooth block meshes with the gear, thereby locking the worm. When the worm angle needs to be adjusted, the force of the compression spring is overcome to pull the tooth block away from the gear, so that the tooth block separates from the gear. At this time, the worm can be rotated freely, thereby driving the turntable and crankshaft to rotate to the required machining position. This design can not only accurately adjust the crankshaft angle, but also effectively prevent the worm from rotating unexpectedly during the machining process, ensuring machining stability.

[0017] Optionally, the drive mechanism includes a servo motor and a lead screw. The base has a groove, and the bottom wall of the movable seat has a slider that is slidably engaged in the groove. The lead screw is rotatably connected to the base and passes through the slider and is threadedly connected to it. The servo motor is mounted on the base, and its rotating shaft is connected to the lead screw.

[0018] By adopting the above technical solution, the servo motor drives the lead screw to rotate, and the threaded engagement between the lead screw and the slider allows the movable seat to move smoothly along the groove on the base. This design achieves precise control over the position of the movable seat, thereby ensuring that the two ends of the crankshaft maintain an accurate relative position throughout the machining process. At the same time, the engagement structure between the slider and the groove improves the stability of the movable seat's movement, effectively avoiding positional deviations caused by vibration or external interference, and improving the accuracy and efficiency of crankshaft machining.

[0019] Optionally, the second positioning component includes a fastening bolt, and the rotating table is provided with a fixing ring on the side near the fixed seat. The fastening bolt is threadedly connected to the peripheral wall of the fixing ring, and the threaded end of the fastening bolt is used to abut against the peripheral wall of the crankshaft. Two sets of fastening bolts are symmetrically arranged around the axis of the fixing ring.

[0020] By adopting the above technical solution, the crankshaft can be more securely fixed during clamping. The design of the fastening bolts allows operators to manually adjust their tightness, thus accommodating crankshafts of different sizes and ensuring that the crankshaft does not loosen or shift during processing. Simultaneously, the symmetrical arrangement of two sets of fastening bolts around the fixing ring axis further improves the balance of clamping force, effectively avoiding crankshaft deformation or damage caused by uneven force, thereby improving processing accuracy and product quality.

[0021] In summary, this application includes at least one of the following beneficial technical effects:

[0022] 1. The crankshaft is initially fixed by the first positioning component on the rotating cylinder. Then, the movable seat is driven to approach the crankshaft by the drive mechanism, and the other end of the crankshaft is fixed by the second positioning component to achieve a precise fixation of the entire crankshaft. At the same time, the setting of the rotating table and the rotating mechanism allows the crankshaft to rotate around its own axis, which improves the problem that the crankshaft needs to be repeatedly disassembled and assembled when drilling operations are required at different angles, which is inconvenient to use.

[0023] 2. The coordinated design of the first and second connecting rods ensures stable fixation of the crankshaft on the clamping device, effectively preventing the crankshaft from shaking or falling off during processing, thereby improving processing accuracy and safety. The structure is simple and easy to use.

[0024] 3. The combination of worm gear, worm shaft, and handwheel enables the manual and precise adjustment of the rotary table in the crankshaft machining clamping device, facilitating operators to accurately adjust the crankshaft angle and effectively improving the operational convenience and work efficiency during crankshaft machining. Attached Figure Description

[0025] To more clearly illustrate the technical solutions in the embodiments of this application, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the accompanying drawings described below are only some embodiments of this application. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0026] Figure 1 This is a schematic diagram of the overall structure of an embodiment of this application;

[0027] Figure 2 This is a cross-sectional structural diagram of an embodiment of this application;

[0028] Figure 3 yes Figure 2 A magnified view of part A in the diagram.

[0029] Reference numerals: 1. Base; 11. Slide groove; 2. Fixed seat; 21. Slot; 22. Bearing; 23. Rotating cylinder; 3. Movable seat; 31. Slider; 32. Worm gear; 33. Worm; 34. Handwheel; 35. Gear; 36. Gear block; 37. Compression spring; 4. Rotating table; 41. Fastening bolt; 42. Fixing ring; 5. Crank arm; 51. First connecting rod; 52. Second connecting rod; 53. Clamping block; 6. Servo motor; 7. Lead screw. Detailed Implementation

[0030] The following is in conjunction with the appendix Figure 1-3 This application will be described in further detail.

[0031] This application discloses a clamping device for crankshaft machining. (Refer to...) Figure 1 The crankshaft machining clamping device includes a base 1, a fixed seat 2, a movable seat 3, a drive mechanism, and a rotation mechanism. The fixed seat 2 is vertically fixedly mounted on the base 1. A slot 21 is horizontally formed on the fixed seat 2, and a rotating cylinder 23 is rotatably connected to the slot 21 via a bearing 22. A first positioning component for fixing one end of the crankshaft is mounted on the rotating cylinder 23. The movable seat 3 is horizontally slidably connected to the base 1, and the drive mechanism is mounted on the base 1 to drive the movable seat 3 to move. A rotating platform 4 is rotatably connected to the movable seat 3. The axis of rotation of the rotating platform 4 is coaxial with the axis of rotation of the rotating cylinder 23. A second positioning component is mounted on the rotating platform 4 to fix the other end of the crankshaft. The rotation mechanism is mounted on the movable seat 3 to drive the rotating platform 4 to rotate.

[0032] In use, one end of the crankshaft is first fixed to the rotating cylinder 23 by the first positioning component. Then, the movable seat 3 is driven closer to the crankshaft by the drive mechanism. When the second positioning component on the rotating table 4 contacts the other end of the crankshaft, the other end of the crankshaft is fixed by the second positioning component. At this time, the overall positioning and fixing of the crankshaft is completed. When it is necessary to rotate the crankshaft to facilitate drilling operations at different angles, it is only necessary to rotate the rotating table 4 appropriately by the rotating mechanism. There is no need to repeatedly disassemble and assemble the crankshaft, which improves the problem of the inconvenience of repeatedly disassembling and assembling the crankshaft when drilling operations at different angles are required.

[0033] Specifically, refer to Figure 2 and Figure 3The first positioning assembly includes multiple positioning components, which are evenly distributed in four groups around the axis of the rotating cylinder 23. The positioning components can be in the form of a crank arm 5. For example, the crank arm 5 includes an integrally formed first connecting rod 51 and a second connecting rod 52 connected at a 90° angle. The middle part of the crank arm 5 is rotatably connected to the inner wall of the rotating cylinder 23 via a pin, allowing for a certain degree of adjustment. The side wall of the first connecting rod 51 abuts against the crankshaft end face, providing initial positioning; the end face of the second connecting rod 52 abuts against the crankshaft peripheral wall, further enhancing the clamping force. When the end face of one end of the crankshaft is pressed against the side wall of the first connecting rod 51, the second connecting rod 52 swings via a lever, causing its end face to press against the crankshaft peripheral wall. The first connecting rod 51 provides axial limiting for the crankshaft, and the second connecting rod 52 provides radial limiting for the crankshaft, thereby achieving stable fixation of one end of the crankshaft.

[0034] Furthermore, a clamping block 53 is rotatably connected to the end of the second connecting rod 52, and the side wall of the clamping block 53 is provided with anti-slip texture. The clamping block 53 replaces the second connecting rod 52 to abut against the crankshaft, which increases the contact area and improves the stability of the fixation, while also reducing frictional damage to the crankshaft peripheral wall. The anti-slip texture design not only increases friction to prevent slippage, but also allows for customized surface textures according to different crankshaft models, making it highly adaptable. As for the clamping block 53 itself, in addition to metal materials, it can also be made of wear-resistant composite materials, which reduces weight and increases service life.

[0035] For example, refer to Figure 2 The drive mechanism includes a servo motor 6 and a lead screw 7. A groove 11 is provided on the base 1, extending laterally on the upper surface of the base 1. The width of the groove opening is smaller than the width of the groove bottom. A slider 31 is provided on the bottom wall of the movable seat 3, and the slider 31 is slidably engaged within the groove 11. The lead screw 7 is located within the groove 11 along its extension direction and is rotatably connected to the base 1 around its own axis. Simultaneously, the lead screw 7 passes through the slider 31 and is threadedly connected to it. The servo motor 6 is bolted and fixed to the base 1, and the rotation shaft of the servo motor 6 is coaxially connected to the lead screw 7. This design allows for convenient control of the forward and backward trajectory of the movable seat 3 simply by operating the servo motor 6 to rotate the lead screw 7, greatly improving the degree of automation and reducing the risk of errors caused by human intervention.

[0036] Specifically, the second positioning component includes fastening bolts 41. A retaining ring 42 is provided on the side of the rotating platform 4 near the fixed base 2. The retaining ring 42 is coaxial with the rotating cylinder 23. The fastening bolts 41 are radially threaded onto the circumferential wall of the retaining ring 42. The threaded end of the fastening bolts 41 is used to abut against the circumferential wall of the crankshaft. Two fastening bolts 41 are symmetrically arranged around the axis of the retaining ring 42. When one end of the crankshaft is inserted into the retaining ring 42, tightening all the fastening bolts 41 causes the threaded end of the fastening bolts 41 to abut against the circumferential wall of the crankshaft, thus achieving stable clamping and fixing of the crankshaft. The structure is simple and practical.

[0037] As for the part responsible for driving the rotation of the rotating platform 4, refer to... Figure 1 and Figure 2 The rotating mechanism includes a worm gear 32, a worm 33, and a handwheel 34. The worm gear 32 is coaxially connected to the rotating table 4. The worm 33 is horizontally mounted on the movable seat 3 and rotatably connected to the movable seat 3 around its own axis. The worm 33 and the worm gear 32 are engaged. The handwheel 34 is connected to the end of the worm 33. By rotating the handwheel 34, the worm 33 is driven to rotate, which synchronously drives the worm gear 32 to rotate, thereby achieving the rotational drive of the rotating table 4. The adjustment method is relatively stable and reliable.

[0038] In addition, refer to Figure 1 To improve machining accuracy, a self-locking structure is added to the worm gear 33. Specifically, a gear 35 is coaxially connected to the worm gear 33, and a sliding groove is vertically formed on the side wall of the movable seat 3. A toothed block 36 is slidably engaged within the sliding groove. The toothed block 36 has teeth on the side near the gear 35, and a compression spring 37 is connected to the side of the toothed block 36 away from the gear 35. The other end of the compression spring 37 is fixedly connected to the sliding seat. The compression spring 37 is in a compressed state and tends to engage the teeth of the toothed block 36 with the gear 35. When the angle of the rotating table 4 is adjusted to the correct position, the toothed block 36 engages with the gear 35 under the elastic force of the compression spring 37, thereby limiting the rotation of the worm gear 33. This effectively prevents the worm gear 33 from rotating unexpectedly during machining, ensuring machining stability. When it is necessary to rotate the worm gear 33, it is only necessary to overcome the elastic force of the compression spring 37 to drive the toothed block 36 away from the gear 35.

[0039] The implementation principle of the crankshaft machining clamping device in this embodiment is as follows: During use, one end of the crankshaft is first inserted into the rotating cylinder 23, causing the crankshaft end to abut against the side wall of the first connecting rod 51. During the swinging process of the second connecting rod 52, the side wall of the clamping block 53 also simultaneously abuts against the crankshaft side wall, thus achieving stable fixation of one end of the crankshaft. Next, the servo motor 6 is started to drive the lead screw 7 to rotate, thereby driving the movable seat 3 closer to the crankshaft. When the other end of the crankshaft is fully inserted into the fixing ring 42, all the fastening bolts 41 are tightened, causing the threaded ends of the fastening bolts 41 to abut against the crankshaft peripheral wall, thus locking the crankshaft end. When it is necessary to adjust the crankshaft angle for drilling at different angles, simply rotate the handwheel 34 to drive the worm gear 33 to rotate, which in turn drives the worm wheel 32 to rotate, simultaneously driving the rotating table 4 to rotate, thereby achieving crankshaft rotation adjustment. This improves upon the problem of repeated disassembly and assembly of the crankshaft when drilling at different angles, which is inconvenient. In addition, during the machining process, the tooth block 36 remains engaged with the gear 35 under the elastic force of the compression spring 37, thereby limiting the abnormal rotation of the worm 33 and improving machining accuracy.

[0040] The above are all optional embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.

Claims

1. A clamping device for machining of a crankshaft, characterized in that: The utility model relates to a crankshaft positioning device, including base (1), fixed seat (2), movable seat (3), drive mechanism and rotation mechanism, fixed seat (2) is located on base (1), along the transverse direction and is equipped with rotation cylinder (23) on fixed seat (2), rotation cylinder (23) is connected on fixed seat (2) around the axis of rotation, be equipped with the first positioning assembly for fixing crankshaft on rotation cylinder (23), movable seat (3) is connected on base (1) along the transverse direction and slides, drive mechanism is equipped with on base (1) and is used for driving movable seat (3) to remove, rotation platform (4) is rotatably connected on movable seat (3), and the rotation axis of rotation platform (4) is coaxial with rotation cylinder (23) axis, be equipped with the second positioning assembly on rotation platform (4), and rotation mechanism is equipped with on movable seat (3) and is used for driving rotation platform (4) rotation.

2. The chucking device for machining of a crankshaft according to claim 1, characterized in that: The first positioning assembly includes a plurality of positioning components, and the plurality of positioning components are uniformly arranged around the axis of rotation of the rotation cylinder (23). The positioning component includes a toggle arm (5) that includes a first link (51) and a second link (52) integrally formed and connected at an angle. The toggle arm (5) is rotatably connected to the inner wall of the rotation cylinder (23) at the middle portion. The side wall of the first link (51) is used to abut against the end surface of the crankshaft. The end surface of the second link (52) is used to abut against the peripheral wall of the crankshaft.

3. The chucking device for machining of a crankshaft according to claim 2, characterized in that: The end portion of the second link (52) is rotatably connected to a clamping block (53). The side wall of the clamping block (53) is provided with anti-slip lines.

4. The chucking device for machining of a crankshaft according to claim 1, characterized in that: The rotation mechanism includes a worm gear (32), a worm (33), and a hand wheel (34). The worm gear (32) is coaxially connected to the rotation platform (4). The worm (33) is rotatably connected to the movable seat (3). The worm gear (32) is engaged with the worm (33). The hand wheel (34) is connected to one end of the worm (33).

5. The chucking device for machining of a crankshaft according to claim 4, characterized in that: The worm (33) is coaxially connected to a gear (35). The movable seat (3) is slidably connected to a tooth block (36). The tooth block (36) is connected to a compression spring (37) on the side away from the gear (35). The other end of the compression spring (37) is connected to the movable seat (3). The compression spring (37) tends to engage the tooth block (36) with the gear (35).

6. The chucking device for machining of a crankshaft according to claim 1, characterized in that: The drive mechanism includes a servo motor (6) and a lead screw (7). The base (1) is provided with a sliding groove (11). The bottom wall of the movable seat (3) is provided with a sliding block (31). The sliding block (31) is slidably connected to the sliding groove (11). The lead screw (7) is rotatably connected to the base (1). The lead screw (7) is arranged in the sliding block (31) and is threadedly connected to the sliding block (31). The servo motor (6) is arranged on the base (1). The rotation shaft of the servo motor (6) is connected to the lead screw (7).

7. The chucking device for machining of a crankshaft according to claim 1, characterized in that: The second positioning assembly includes a fastening bolt (41). The rotation platform (4) is provided with a fixing ring (42) on the side close to the fixed seat (2). The fastening bolt (41) is threadedly connected to the peripheral wall of the fixing ring (42). The threaded end of the fastening bolt (41) is used to abut against the peripheral wall of the crankshaft. The fastening bolt (41) is symmetrically provided with two groups around the axis of the fixing ring (42).

Images