A crankshaft machining fixture

Abstract

This patent discloses a crankshaft processing and fixing device, including a base and a crankshaft, a drive box is installed on the base, a triangular chuck is installed on the drive box, and one end of the crankshaft is fixed in the triangular chuck; a U-shaped frame is installed on the base, and an auxiliary structure is installed on the U-shaped frame. The number of the auxiliary structures is two, and the auxiliary structures are symmetrically distributed on both sides with the center line of the U-shaped frame as the center. The auxiliary structure includes a U-shaped plate, a pin, a pulley, a cross plate, a cross groove, a threaded hole, a bolt and a handle; the pulley is rotatably connected to the U-shaped plate through a pin, and the pulley is pressed against the crankshaft. During the crankshaft processing, the cross plate moves along the cross groove on the U-shaped frame, so that the pulley is pressed against the crankshaft. At this time, the handle is turned to drive the bolt to be screwed into the threaded hole and pressed against the cross plate to fix the pulley. As the crankshaft rotates, the pulley rotates on the U-shaped plate through the pin to assist in fixing the rotating shaft and prevent the crankshaft from deflecting.

Description

Technical Field

[0001] This patent relates to the field of crankshaft machining and fixing technology, specifically a crankshaft machining and fixing device. Background Art

[0002] The crankshaft is the most important component in the engine. It bears the force transmitted from the connecting rod and converts it into torque, which is output through the crankshaft and drives other accessories on the engine. The crankshaft needs to be clamped and fixed during the processing. However, the current crankshaft processing and fixing device usually uses a three-jaw chuck to fix one end and a conical ejector pin to fix the other end. During the crankshaft processing, the force it bears is relatively large, and there is a lack of fixing assistance in the middle area of ​​the crankshaft, which makes the crankshaft processing tilt, causing the crankshaft processing damage. Utility Model Content

[0003] The purpose of this patent is to provide a crankshaft processing and fixing device.

[0004] To achieve the above purpose, this patent provides the following technical solutions: a crankshaft processing and fixing device, comprising a base and a crankshaft, a drive box is installed on the base, a triangular chuck is installed on the drive box, and one end of the crankshaft is fixed in the triangular chuck;

[0005] A U-shaped frame is installed on the base, and an auxiliary structure is installed on the U-shaped frame. The number of the auxiliary structures is two, and the auxiliary structures are symmetrically distributed on both sides with the center line of the U-shaped frame as the center. The auxiliary structure includes a U-shaped plate, a pin shaft, a pulley, a cross plate, a cross groove, a threaded hole, a bolt and a handle;

[0006] The pulley is rotatably connected to the U-shaped plate through a pin shaft, the pulley is pressed against the crankshaft, the cross plate is installed on the U-shaped plate, the cross groove is opened on the U-shaped frame, the cross plate extends into the cross groove, the threaded hole is opened on the cross groove, the bolt is sleeved in the threaded hole, the handle is installed on the bolt, and the bolt is pressed against the cross plate.

[0007] Preferably, the U-shaped frame is placed on a base, a slider is installed on the U-shaped frame, a slide groove is provided on the base, and the slider is slidably connected in the slide groove.

[0008] Preferably, the slider is positioned in the slide groove by an elastic structure, and the elastic structure includes a groove, a spring and a ball;

[0009] The groove is arranged in the slide block, the spring is installed in the groove, the ball is installed on the spring, and the ball is pressed tightly in the slide groove.

[0010] Preferably, a tightening structure is installed on the base, and the tightening structure includes a vertical plate, a threaded groove, a threaded rod and a top head;

[0011] The vertical plate is installed on the base, the thread groove is arranged on the vertical plate, the threaded rod is sleeved in the thread groove, the top head is installed on the threaded rod, and the top head is tightly pressed against the other end of the crankshaft.

[0012] Preferably, a circular groove is provided in the plug, a bearing is installed in the circular groove, and the threaded rod is installed in the inner ring of the bearing.

[0013] Preferably, a turntable is mounted on the threaded rod.

[0014] Compared with the prior art, the beneficial effects of this patent are: the crankshaft processing fixture has the following advantages compared with the traditional technology:

[0015] 1. During the crankshaft processing, the horizontal plate moves along the horizontal groove on the U-shaped frame to make the pulley press against the crankshaft. At this time, the handle is turned to drive the bolt to screw into the threaded hole and press against the horizontal plate to fix the pulley. As the crankshaft rotates, the pulley rotates on the U-shaped plate through the pin shaft to assist in fixing the rotating shaft and prevent the crankshaft from deflecting during processing.

[0016] 2. The slider on the U-shaped frame slides along the slide groove, so that the pulley adjusts its position along the crankshaft. After stopping, the spring in the groove gives the ball a downward force, and the ball presses tightly in the slide groove, limiting the U-shaped frame to avoid interfering with the crankshaft processing;

[0017] 3. After one end of the crankshaft is clamped and fixed, rotate the turntable to drive the threaded rod to screw into the threaded groove, so that the head is pressed against the other end of the crankshaft. As the crankshaft rotates, the head rotates on the threaded rod through the bearing to prevent wear marks from appearing on one end of the crankshaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the structure of this patent;

[0019] Figure 2 This is a schematic diagram of the structure of the groove, spring and ball of this patent;

[0020] Figure 3 This is a schematic diagram of the structure of the patent head, circular groove and bearing;

[0021] Figure 4 This is a schematic diagram of the structure of the U-shaped plate, pin shaft and pulley of this patent.

[0022] In the figure: 1, base, 2, drive box, 3, triangular chuck, 4, auxiliary structure, 401, U-shaped plate, 402, pin shaft, 403, pulley, 404, cross plate, 405, cross groove, 406, threaded hole, 407, bolt, 408, handle, 5, crankshaft, 6, U-shaped frame, 7, slider, 8, slide groove, 9, elastic structure, 10, groove, 11, spring, 12, ball, 13, tightening structure, 14, vertical plate, 15, threaded groove, 16, threaded rod, 17, top head, 18, turntable, 19, round groove, 20, bearing. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of this patent to clearly and completely describe the technical solutions in the embodiments of this patent. Obviously, the described embodiments are only part of the embodiments of this patent, not all of them. Based on the embodiments in this patent, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this patent.

[0024] See also Figure 1-4 , this patent provides a technical solution: a crankshaft processing fixing device, including a base 1 and a crankshaft 5, the crankshaft 5 is a rough material for processing the crankshaft, a driving box 2 is installed on the base 1, a servo motor is installed in the driving box 2, powered by an external power supply, a triangular chuck 3 is installed on the driving box 2, the triangular chuck 3 is installed on the output shaft of the servo motor, the output shaft of the servo motor drives the triangular chuck 3 to rotate, one end of the crankshaft 5 is fixed in the triangular chuck 3, one end of the crankshaft 5 is clamped in the triangular chuck 3, and the crankshaft 5 is rotated, and the turning processing is performed by an external turning tool;

[0025] A U-shaped frame 6 is installed on the base 1, and an auxiliary structure 4 is installed on the U-shaped frame 6. The number of the auxiliary structures 4 is two, and the auxiliary structures 4 are symmetrically distributed on both sides with the center line of the U-shaped frame 6 as the center. The auxiliary structure 4 includes a U-shaped plate 401, a pin 402, a pulley 403, a horizontal plate 404, a horizontal groove 405, a threaded hole 406, a bolt 407 and a handle 408;

[0026] The pulley 403 is rotatably connected to the U-shaped plate 401 through the pin 402, the pulley 403 is pressed against the crankshaft 5, the cross plate 404 is installed on the U-shaped plate 401, the cross groove 405 is provided on the U-shaped frame 6, the cross plate 404 extends into the cross groove 405, the threaded hole 406 is provided on the cross groove 405, the bolt 407 is sleeved in the threaded hole 406, the handle 408 is installed on the bolt 407, the bolt 407 is pressed against the cross plate 404, the crankshaft 5 is rotated and the crankshaft 5 is rotated. During the processing of shaft 5, the horizontal plate 404 is moved inward along the horizontal groove 405 on the U-shaped frame 6, so that the pulley 403 is pressed against the crankshaft 5. At this time, the handle 408 is turned to drive the bolt 407 to be screwed into the threaded hole 406 and pressed against the horizontal plate 404 to fix the pulley 403. As the crankshaft 5 rotates during processing, the pulley 403 rotates on the U-shaped plate 401 through the pin 402, which assists in fixing the rotating shaft 5 and preventing the crankshaft 5 from deflecting during processing.

[0027] The U-shaped frame 6 is placed on the base 1, and a slider 7 is installed on the U-shaped frame 6. A slide groove 8 is opened on the base 1. The slider 7 is slidably connected in the slide groove 8. The slider 7 on the U-shaped frame 6 slides along the slide groove 8 to adjust the position of the pulley 403 along the crankshaft 5 to avoid interfering with the processing of the crankshaft 5. The slider 7 is made of a steel block wrapped with rubber material on the outside to increase the friction between the slider and the slide groove 8.

[0028] The slider 7 is positioned in the slide groove 8 by an elastic structure 9, and the elastic structure 9 includes a groove 10, a spring 11 and a ball 12;

[0029] The groove 10 is opened in the slider 7, the spring 11 is installed in the groove 10, the ball 12 is installed on the spring 11, the ball 12 is pressed against the slide groove 8, the slider 7 on the U-shaped frame 6 slides along the slide groove 8, and after stopping, the spring 11 in the groove 10 gives the ball 12 a downward force, the ball 12 is pressed against the slide groove 8, limiting the U-shaped frame 6, and the spring 11 selects the elastic coefficient to fix the spring of the U-shaped frame 6 (if the U-shaped frame 6 is still unstable during the processing, it can be manually fixed or external force can be used to assist in fixation).

[0030] A tightening structure 13 is installed on the base 1, and the tightening structure 13 includes a vertical plate 14, a threaded groove 15, a threaded rod 16 and a top head 17;

[0031] The vertical plate 14 is mounted on the base 1, the threaded groove 15 is provided on the vertical plate 14, the threaded rod 16 is sleeved in the threaded groove 15, the top head 17 is mounted on the threaded rod 16, the threaded rod 16 is mounted with a turntable 18, and the top head 17 is pressed against the other end of the crankshaft 5;

[0032] A circular groove 19 is provided in the ram 17, and a bearing 20 is installed in the circular groove 19. The threaded rod 16 is installed in the inner ring of the bearing 20. After one end of the crankshaft 5 is clamped and fixed, the turntable 18 is rotated to drive the threaded rod 16 to be screwed into the threaded groove 15, so that the ram 17 is pressed against the other end of the crankshaft 5. As the crankshaft 5 rotates, the ram 17 rotates on the threaded rod 16 through the bearing 20 to prevent wear marks from appearing on one end of the crankshaft 5.

[0033] When using the crankshaft processing fixture, first fix one end of the crankshaft 5 in the triangular chuck 3, and clamp one end of the crankshaft 5 in the triangular chuck 3. After one end of the crankshaft 5 is clamped and fixed, turn the turntable 18 to drive the threaded rod 16 to be screwed into the threaded groove 15, so that the head 17 is pressed against the other end of the crankshaft 5, and the cross plate 404 moves along the cross groove 405 on the U-shaped frame 6, so that the pulley 403 is pressed against the crankshaft 5. At this time, turn the handle 408 to drive the bolt 407 to be screwed into the threaded hole 406 and pressed against the cross plate 404, fixing the pulley 403, and as the crankshaft 5 rotates, The turning process allows the pulley 403 to rotate on the U-shaped plate 401 through the pin 402, which assists in fixing the rotating shaft 5 and prevents the crankshaft 5 from being deflected. As the crankshaft 5 rotates, the head 17 rotates on the threaded rod 16 through the bearing 20 to prevent wear marks from appearing on one end of the crankshaft 5. The slider 7 on the U-shaped frame 6 slides along the slide groove 8, so that the pulley 403 is adjusted along the crankshaft 5 to avoid interfering with the processing of the crankshaft 5. The slider 7 on the U-shaped frame 6 slides along the slide groove 8. After stopping, the spring 11 in the groove 10 gives the ball 12 a downward force, and the ball 12 presses tightly in the slide groove 8 to limit the U-shaped frame 6.

[0034] Although the embodiments of the present patent have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present patent, and the scope of the present patent is defined by the appended claims and their equivalents.

Claims

1. A crankshaft machining fixture, comprising a base (1) and a crankshaft (5), characterized in that: A drive box (2) is mounted on the base (1), a triangular chuck (3) is mounted on the drive box (2), and one end of the crankshaft (5) is fixed in the triangular chuck (3); A U-shaped frame (6) is installed on the base (1), and an auxiliary structure (4) is installed on the U-shaped frame (6). The number of the auxiliary structures (4) is two, and the auxiliary structures (4) are symmetrically distributed on both sides with the center line of the U-shaped frame (6) as the center. The auxiliary structure (4) includes a U-shaped plate (401), a pin shaft (402), a pulley (403), a transverse plate (404), a transverse groove (405), a threaded hole (406), a bolt (407) and a handle (408); The pulley (403) is rotatably connected to the U-shaped plate (401) through a pin shaft (402), the pulley (403) is pressed against the crankshaft (5), the transverse plate (404) is installed on the U-shaped plate (401), the transverse groove (405) is provided on the U-shaped frame (6), the transverse plate (404) extends into the transverse groove (405), the threaded hole (406) is provided on the transverse groove (405), the bolt (407) is sleeved in the threaded hole (406), the handle (408) is installed on the bolt (407), and the bolt (407) is pressed against the transverse plate (404).

2. A crankshaft machining fixture according to claim 1, characterized in that: The U-shaped frame (6) is placed on the base (1), a slider (7) is installed on the U-shaped frame (6), a slide groove (8) is provided on the base (1), and the slider (7) is slidably connected in the slide groove (8).

3. A crankshaft machining fixture according to claim 2, characterized in that: The slider (7) is positioned in the slide groove (8) through an elastic structure (9), and the elastic structure (9) comprises a groove (10), a spring (11) and a ball (12); The groove (10) is formed in the slide block (7), the spring (11) is installed in the groove (10), the ball (12) is installed on the spring (11), and the ball (12) is tightly pressed in the slide groove (8).

4. A crankshaft machining fixture according to claim 1, characterized in that: The base (1) is provided with a clamping structure (13), wherein the clamping structure (13) comprises a vertical plate (14), a threaded groove (15), a threaded rod (16) and a top head (17); The vertical plate (14) is mounted on the base (1), the threaded groove (15) is formed on the vertical plate (14), the threaded rod (16) is sleeved in the threaded groove (15), the top head (17) is mounted on the threaded rod (16), and the top head (17) is pressed against the other end of the crankshaft (5).

5. A crankshaft machining and fixing device according to claim 4, characterized in that: A circular groove (19) is provided in the top head (17), a bearing (20) is installed in the circular groove (19), and the threaded rod (16) is installed in the inner ring of the bearing (20).

6. A crankshaft machining and fixing device according to claim 4, characterized in that: A rotating disk (18) is mounted on the threaded rod (16).

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