Adjustable fixing device for crankshaft machining

Abstract

The utility model discloses an adjustable fixing device for crankshaft machining, relates to the technical field of crankshaft machining, and aims to provide a crankshaft fixing device which does not need a debugging program when main journals with different diameters are replaced, and the adjustable fixing device comprises a driving assembly, three moving blocks, three clamping jaws and three groups of adjusting assemblies, the driving assembly is used for driving the three moving blocks to get close to each other or get away from each other, the three clamping jaws are slidably mounted on the three moving blocks correspondingly, and the three adjusting assemblies are fixed to the three moving blocks correspondingly, connected with the three clamping jaws correspondingly and used for adjusting the relative positions of the clamping jaws and the moving blocks. And the relative position between the clamping jaw and the moving block can be adjusted through the adjusting assembly, when different main journals are clamped, only the relative position between the clamping jaw and the moving block needs to be adjusted, and the moving stroke of the moving block does not need to be adjusted.

Description

Technical Field

[0001] This utility model relates to the field of crankshaft machining technology, and more specifically, to an adjustable fixing device for crankshaft machining. Background Technology

[0002] The crankshaft is a crucial rotating component in an engine, its primary function being to convert the reciprocating motion of the piston into rotational motion. Its quality directly affects the engine's performance and lifespan. In the crankshaft manufacturing process, grinding is a key step in ensuring its surface quality and dimensional accuracy. Precise grinding enables the crankshaft surface to achieve the required smoothness and dimensional requirements, thereby guaranteeing its stable and efficient operation within the engine.

[0003] In existing crankshaft grinding processes, a three-jaw chuck is typically used to secure the crankshaft's main journal. A three-jaw chuck consists of a chuck body, movable jaws, and a jaw drive mechanism. The jaw drive mechanism moves the three jaws closer to or further away from the center to clamp workpieces of different diameters. However, this securing method has some significant drawbacks. First, the stroke of the three-jaw chuck varies when securing main journals of different diameters. This requires operators to adjust the corresponding program according to the different sizes of the main journals, increasing the complexity and workload of the operation.

[0004] In view of the above problems, there is an urgent need for a crankshaft fixing device that can replace the main journals of different diameters without adjusting the program. Utility Model Content

[0005] In view of the problems existing in the prior art, this utility model provides an adjustable fixing device for crankshaft machining to solve the technical problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: an adjustable fixing device for crankshaft machining, comprising a drive assembly, three moving blocks, three grippers, and three sets of adjustment assemblies. The drive assembly drives the three moving blocks to move closer to or further apart from each other. The three grippers are slidably mounted on the three moving blocks. The three sets of adjustment assemblies are fixed on the three moving blocks and connected to the three grippers respectively, for adjusting the relative position of the grippers and the moving blocks. The adjustment assembly includes a vertical plate fixed on the moving blocks, a screw fixed on the grippers, and a threaded sleeve threaded onto the screw. The vertical plate has a first through hole, and a connecting sleeve is fixed on one side of the threaded sleeve, and the connecting sleeve is rotatably mounted in the first through hole.

[0007] The present invention is further configured such that a housing is fixedly installed on the upright plate, and the housing has a second through hole for the screw to pass through.

[0008] The present invention is further configured such that the adjusting component includes a worm wheel fixedly sleeved outside the screw sleeve and a worm rotatably connected to the outer shell, wherein the worm wheel and the worm are meshed together.

[0009] The present invention is further configured such that one end of the worm gear has an extension section extending out of the outer shell, and a hexagonal sleeve is fixedly provided on the outside of the extension section.

[0010] The present invention is further configured as follows: the adjustable fixing device for crankshaft machining includes a first fixing plate and a second fixing plate, the first fixing plate having a sliding groove, and the moving block being slidably installed in the sliding groove.

[0011] The present invention is further configured such that the driving assembly includes a rotating disk and a driving shaft fixedly connected to the rotating disk, the first fixed disk has a cavity communicating with the slide groove, the rotating disk is rotatably installed in the cavity, and the mating surfaces of the rotating disk and the moving block both have mutually meshing planar threads.

[0012] The present invention is further configured such that the second fixed plate has a third through hole through which the drive shaft passes.

[0013] The present invention is further configured such that the first fixed plate and the second fixed plate are connected by bolts.

[0014] Compared with the prior art, this utility model provides an adjustable fixing device for crankshaft machining, which has the following advantages:

[0015] 1. In this application, the gripper is slidably mounted on the moving block, and the relative position between the gripper and the moving block can be adjusted by adjusting the component. When gripping different spindle journals, the relative position between the gripper and the moving block can be adjusted, and the travel of the moving block does not need to be adjusted.

[0016] 2. In this application, the worm gear combination drives the screw sleeve to rotate. The lead angle of the worm is smaller than the equivalent friction angle between the meshing gear teeth, thereby achieving self-locking between the worm and the worm gear and preventing the position of the chuck from changing after adjustment. Attached Figure Description

[0017] Figure 1 This is a schematic diagram of the overall structure of the adjustable fixing device for crankshaft machining in this utility model;

[0018] Figure 2 This is an exploded structural diagram of the drive component and the moving block in this utility model;

[0019] Figure 3 This is a schematic diagram of the structure of the movable block, the first fixed disk, and the rotating disk in this utility model;

[0020] Figure 4 This is a schematic diagram of the adjustment component in this utility model;

[0021] Figure 5 This is a schematic diagram of the adjustment component with the outer shell removed in this utility model;

[0022] Figure 6 This is a schematic diagram of the worm gear and worm in this utility model.

[0023] In the diagram: 1. Drive assembly; 101. Rotary disk; 102. Drive shaft; 103. Planar thread; 2. Moving block; 3. Clamp; 4. Adjustment assembly; 401. Vertical plate; 402. Screw; 403. Screw sleeve; 404. First through hole; 405. Connecting sleeve; 406. Worm gear; 407. Worm; 408. Extension section; 409. Hexagonal sleeve; 5. Outer shell; 501. Second through hole; 6. First fixed disk; 601. Slide groove; 602. Cavity; 7. Second fixed disk; 701. Third through hole. Detailed Implementation

[0024] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0025] It should be noted that, unless otherwise specified, all technical and scientific terms used in this application have the same meaning as commonly understood by one of ordinary skill in the art to which this application pertains.

[0026] In this utility model, unless otherwise stated, the orientations used, such as "up" and "down", usually refer to the direction shown in the accompanying drawings, or to the vertical, perpendicular, or gravitational direction; similarly, for ease of understanding and description, "left" and "right" usually refer to the left and right shown in the accompanying drawings; "inner" and "outer" refer to the inner and outer contours of each component itself, but the above directional terms are not used to limit this utility model.

[0027] Please see Figure 1-6 An adjustable fixing device for crankshaft machining includes a drive assembly 1, three moving blocks 2, three grippers 3, and three sets of adjustment assemblies 4. The drive assembly 1 is used to drive the three moving blocks 2 to move closer to each other or further away from each other. The three grippers 3 are slidably mounted on the three moving blocks 2 respectively. The three sets of adjustment assemblies 4 are fixed on the three moving blocks 2 respectively and connected to the three grippers 3 respectively, and are used to adjust the relative position of the grippers 3 and the moving blocks 2. The adjustment assembly 4 includes a vertical plate 401 fixed on the moving blocks 2, a screw 402 fixed on the grippers 3, and a threaded sleeve 403 threaded outside the screw 402. The vertical plate 401 has a first through hole 404. A connecting sleeve 405 is fixed on one side of the threaded sleeve 403 and is rotatably mounted in the first through hole 404.

[0028] In practical applications, the rotation of the screw sleeve 403 drives the screw 402 to move along its axial direction, which in turn drives the gripper 3 to move laterally on the moving block 2, adjusting the relative position between the gripper 3 and the moving block 2, thereby realizing the adjustment function of the gripper 3 to be suitable for fixing crankshafts of different diameters.

[0029] In this embodiment, please refer to Figure 4-6 A housing 5 is fixedly installed on the upright plate 401. The housing 5 has a second through hole 501 through which the screw 402 passes. The adjusting assembly 4 also includes a worm gear 406 fixedly sleeved outside the screw sleeve 403 and a worm 407 rotatably connected to the housing 5. The worm gear 406 and the worm 407 are meshed. One end of the worm 407 has an extension section 408 extending out of the housing 5. A hexagonal sleeve 409 is fixedly installed outside the extension section 408.

[0030] In practical applications, rotating the hexagonal sleeve 409 causes the worm 407 to rotate, which in turn drives the worm wheel 406 to rotate, ultimately causing the threaded sleeve 403 to rotate and driving the screw 402 to move along its axis. The lead angle of the worm 407 is smaller than the equivalent friction angle between the meshing teeth, achieving self-locking between the worm wheel 406 and the worm 407. That is, the worm wheel 406 can only be driven to rotate by the worm 407, and the worm wheel 406 cannot drive the worm 407 to rotate. After adjusting the position of the gripper, its position is locked.

[0031] In this embodiment, the adjustable fixing device for crankshaft machining further includes a first fixing plate 6 and a second fixing plate 7. The first fixing plate 6 has a slide groove 601, and the moving block 2 is slidably installed in the slide groove 601. The drive assembly 1 includes a rotating disk 101 and a drive shaft 102 fixedly connected to the rotating disk 101. The first fixing plate 6 has a cavity 602 communicating with the slide groove 601. The rotating disk 101 is rotatably installed in the cavity 602. The mating surfaces of the rotating disk 101 and the moving block 2 both have mutually meshing planar threads 103. The second fixing plate 7 has a third through hole 701 for the drive shaft 102 to pass through. The first fixing plate 6 and the second fixing plate 7 are connected by bolts.

[0032] In specific applications, the output shaft of the external drive motor of the drive shaft 102 can drive the drive shaft 102 to rotate, thereby driving the rotating disk 101 to rotate. Through the planar thread 103 that meshes between the rotating disk 101 and the moving block 2, the three moving blocks 2 are driven to move inward simultaneously along the direction of the slide groove 601, causing the grippers 3 on the moving blocks 2 to move closer to the center and clamp and fix the main journal of the crankshaft.

[0033] Of all the solutions mentioned above, those involving the connection between two components can be selected according to the actual situation, such as welding, bolt and nut connection, bolt or screw connection, or other known connection methods, which will not be elaborated here. For all the fixed connections mentioned above, welding is preferred. Although embodiments of this utility model have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of this utility model. The scope of this utility model is defined by the appended claims and their equivalents.

Claims

1. An adjustable fixing device for crankshaft machining, characterized in that, It includes a drive assembly (1), three moving blocks (2), three grippers (3), and three sets of adjustment components (4), wherein, The drive component (1) is used to drive three moving blocks (2) to move closer to or further away from each other. The three grippers (3) are slidably mounted on the three movable blocks (2), respectively. The three sets of adjustment components (4) are fixed on the three moving blocks (2) respectively, and are connected to the three grippers (3) respectively, for adjusting the relative position of the grippers (3) and the moving blocks (2). The adjustment assembly (4) includes a vertical plate (401) fixed on the movable block (2), a screw (402) fixed on the gripper (3), and a threaded sleeve (403) threaded outside the screw (402). The vertical plate (401) has a first through hole (404). A connecting sleeve (405) is fixed on one side of the threaded sleeve (403), and the connecting sleeve (405) is rotatably installed in the first through hole (404).

2. The adjustable fixing device for crankshaft machining according to claim 1, characterized in that, A housing (5) is fixedly installed on the upright plate (401), and the housing (5) has a second through hole (501) through which the screw (402) passes.

3. The adjustable fixing device for crankshaft machining according to claim 2, characterized in that, The adjustment assembly (4) also includes a worm wheel (406) fixedly sleeved outside the screw sleeve (403) and a worm (407) rotatably connected to the outer shell (5), with the worm wheel (406) and the worm (407) meshing together.

4. The adjustable fixing device for crankshaft machining according to claim 3, characterized in that, The worm (407) has an extension section (408) extending out of the outer shell (5) at one end, and a hexagonal sleeve (409) is fixedly provided on the outside of the extension section (408).

5. The adjustable fixing device for crankshaft machining according to claim 1, characterized in that, It also includes a first fixed plate (6) and a second fixed plate (7), the first fixed plate (6) having a groove (601), and the movable block (2) being slidably installed in the groove (601).

6. The adjustable fixing device for crankshaft machining according to claim 5, characterized in that, The drive assembly (1) includes a rotating disk (101) and a drive shaft (102) fixedly connected to the rotating disk (101). The first fixed disk (6) has a cavity (602) communicating with the slide groove (601). The rotating disk (101) is rotatably installed in the cavity (602). The mating surfaces of the rotating disk (101) and the moving block (2) both have mutually meshing planar threads (103).

7. The adjustable fixing device for crankshaft machining according to claim 6, characterized in that, The second fixed plate (7) has a third through hole (701) through which the drive shaft (102) passes.

Images