CN220028793U - Crankshaft milling groove positioning fixture with buffer structure - Google Patents

Abstract

The utility model provides a crankshaft milling groove positioning fixture with a buffer structure, which comprises a machine base and a clamping mechanism arranged above the machine base, wherein the clamping mechanism comprises clamping blocks which are oppositely and movably arranged on the machine base and a driving mechanism for driving the two clamping blocks to synchronously approach or separate, buffer pieces are connected to opposite faces of the two clamping blocks in a sliding manner, a cavity for the buffer pieces to move forwards and backwards is formed in the buffer pieces, a spring piece is arranged between the buffer pieces and the clamping blocks, and the spring piece provides buffer force for the buffer pieces when the two clamping blocks synchronously approach and drive the buffer pieces to abut against a crank arranged between the two clamping blocks; the two opposite faces of the two clamping blocks used for positioning the crank corners in the crankshaft milling groove positioning clamp are respectively provided with a buffer member, when the clamping blocks are clamped tightly after being stressed, the spring members provide buffer force for the buffer members, so that the damage to the surfaces of the clamping blocks when the clamping blocks directly clamp the crank is avoided, and the product damage rate is reduced.

Description

Crankshaft milling groove positioning fixture with buffer structure

Technical Field

The utility model relates to a crankshaft milling groove positioning fixture with a buffer structure.

Background

The crankshaft is an important part of the engine, and it bears the force from the connecting rod, converts it into torque, outputs it through the crankshaft and drives other accessories to work. The processing of bent axle is more loaded down with trivial details, and its axle head needs to be seted up the keyway that combines with the part that matches, and the prior art adopts two thimble structures to realize bent axle axial positioning, and clamping mechanism realizes the crank angle location of bent axle, but current clamping mechanism is when pressing from both sides tight crank, and its clamp splice is pressed from both sides the crank directly after receiving thrust, because do not have buffer structure, can make the crank surface damage that is pressed from both sides tight like this very easily, can influence product quality when serious.

Disclosure of Invention

In order to overcome the defects in the prior art, the utility model provides a crankshaft milling groove positioning fixture with a buffer structure.

In order to achieve the above purpose, the utility model provides a crankshaft milling groove positioning fixture with a buffer structure, which comprises a machine base and a clamping mechanism arranged above the machine base, wherein the clamping mechanism comprises clamping blocks which are oppositely and movably arranged on the machine base and a driving mechanism for driving the two clamping blocks to synchronously approach or separate, buffer pieces are connected to opposite faces of the two clamping blocks in a sliding manner, a cavity for the buffer pieces to move forwards and backwards is formed in the two clamping blocks, a spring piece is arranged between the buffer pieces and the clamping blocks, and the spring piece provides buffer force for the buffer pieces when the two clamping blocks synchronously approach and drive the buffer pieces to abut against a crank arranged between the two clamping blocks.

Further, the clamp splice comprises first half clamp splice and second half clamp splice, the cavity divide into the preceding cavity that runs through first half clamp splice and the back cavity that is located second half clamp splice, back cavity height is higher than preceding cavity, the bolster divide into buffering head, slide bar portion, butt portion one end is leaned on first half clamp splice, the other end butt spring piece, on the cavity inner wall behind the spring piece other end rigid coupling.

Further, the distance between the buffer head and the front half clamping block is not greater than the distance that the abutting part can move back and forth in the rear cavity.

Further, the buffer head is a curved plate, and the wall surface of the front half clamping block, which is close to the buffer head, is a curved surface which is matched with the radian of the buffer head.

Further, the material of the buffer head is elastic.

Further, two the clamp splice pass through slide rail assembly with frame sliding connection, slide rail assembly is including slide rail and the slide that the cooperation was used, the slide set firmly in the clamp splice below, actuating mechanism is including setting firmly driving motor on the frame, being located two clamp splice middles and the connecting piece of being connected with the frame rotation, the connecting piece both ends still rotate with two clamp splice respectively and are connected, driving motor's output shaft is parallel with slide rail direction, and with a slide rigid coupling.

Further, the highest point of the connecting piece is not higher than the lowest point of the buffer piece, and the lowest point of the connecting piece is higher than the highest point of the sliding rail.

Further, the telescopic lifting device further comprises a left support and a right support, wherein the left support and the right support are perpendicular to the installation direction of the two clamping blocks, the left support is provided with a fixed thimble, one side surface of the right support is correspondingly provided with a movable thimble, the other side surface of the right support is provided with a driving source, and the driving source is used for adjusting the telescopic quantity of the movable thimble.

Compared with the prior art, the utility model has the beneficial effects that: the two opposite faces of the two clamping blocks used for positioning the crank corners in the crankshaft milling groove positioning clamp are respectively provided with a buffer member, when the clamping blocks are clamped tightly after being stressed, the spring members provide buffer force for the buffer members, so that the damage to the surfaces of the clamping blocks when the clamping blocks directly clamp the crank is avoided, and the product damage rate is reduced.

Drawings

FIG. 1 is a perspective view of a crankshaft milling groove positioning fixture with a buffer structure of the present utility model;

fig. 2 is a cross-sectional view of the clamp block, the buffer member, and the spring member according to the present embodiment when assembled.

Detailed Description

As shown in FIG. 1, the crankshaft milling groove positioning fixture with the buffer structure comprises a machine base 1, a clamping mechanism 2, a left support 9 and a right support 10, wherein the clamping mechanism 2 and the left support 9 are arranged on the machine base 1, the clamping mechanism 2 comprises clamping blocks 3 which are oppositely and movably arranged on the machine base 1, a driving mechanism 4 which drives the two clamping blocks 3 to synchronously approach or separate, the left support 9 and the right support 10 are perpendicular to the installation direction of the two clamping blocks 3, a fixed thimble 11 is arranged on the left support 9, a movable thimble 12 is correspondingly arranged on one side of the right support 10, the crankshaft is axially positioned by adopting a double-thimble structure, the crank angle positioning of the crankshaft is realized by the clamping mechanism 2, a driving source is arranged on the other side of the right support 10, and is used for adjusting the expansion and contraction amount of the movable thimble 12, so that the crankshaft with different lengths can be adapted, and the crankshaft has diversity.

In this embodiment, as shown in fig. 1, two clamping blocks 3 are slidably connected with a machine base 1 through a sliding rail assembly 8, the sliding rail assembly 8 includes a sliding rail 81 and a sliding seat 82 which are matched for use, the sliding seat 81 is fixedly arranged below the clamping blocks 3, the driving mechanism 4 includes a driving motor 41 fixedly arranged on the machine base 1, a connecting piece 42 positioned between the two clamping blocks 3 and rotationally connected with the machine base 1, two ends of the connecting piece 42 are respectively rotationally connected with the two clamping blocks 3, an output shaft of the driving motor 41 is parallel to the direction of the sliding rail 81 and fixedly connected with the sliding seat 82, the highest point of the connecting piece 42 is not higher than the lowest point of the buffer piece 5, the lowest point of the connecting piece 42 is higher than the highest point of the sliding rail 81, the clamping block 3 above the sliding seat 82 connected with the output shaft of the driving motor 41 is an active clamping block, the other clamping block 3 is a passive clamping block, the driving motor 41 sequentially drives the active clamping block, the connecting piece 42 and the passive clamping block to achieve synchronous approaching or synchronous moving away of the clamping blocks 3, and the clamping blocks 3 are synchronously approaching to a crank, and the crank angle is positioned.

In this embodiment, as shown in fig. 1 and 2, the opposite surfaces of the two clamping blocks 3 are both slidingly connected with a buffer 5, a cavity 6 for the buffer 5 to move back and forth is arranged in the buffer, a spring 7 is arranged between the buffer 5 and the clamping block 3, the clamping block 3 is composed of a front half clamping block 31 and a rear half clamping block 32, the cavity 6 is divided into a front cavity 61 penetrating the front half clamping block 31 and a rear cavity 62 located in the rear half clamping block 32, the height of the rear cavity 62 is higher than that of the front cavity 61, the buffer 5 is divided into a buffer head 51, a slide rod 52 and an abutting part 53, the buffer head 51 and the slide rod 52 are integrated, wherein the buffer head 51 is a curved plate, the wall surface of the front half clamping block 31 close to the buffer head 51 is a curved surface which is in contact with the radian of the buffer head 51, preferably, one end of the abutting part 53 abuts against the front half clamping block 31, the other end of the spring 7 abuts against the inner wall of the rear cavity 62, and the spring 7 is fixedly connected with the inner wall of the rear cavity 62, and the buffer 5 is provided with buffer force when the two clamping blocks 3 are synchronously approaching and the buffer 5 is driven to the middle part 3; meanwhile, the distance between the buffer head 51 and the front half clamping block 31 is not greater than the distance that the abutting part 53 can move back and forth in the rear cavity 62, and the rear cavity 62 provides enough buffer displacement for the buffer member 5, so that the buffer effect is improved.

In the specific assembly process, as shown in fig. 2, the spring member 7 is fixedly mounted on the inner wall of the rear cavity 62, after the sliding rod portion 52 of the buffer member 5 penetrates through the front half clamping block 31, the abutting portion 53 is fixedly arranged at the bottom end (optional welding) of the sliding rod portion 52, the front half clamping block 31 and the rear half clamping block 32 are fixedly connected (optional welding), at this time, the other end of the spring member 7 abuts against the abutting portion 53, the buffer member 5 moves in the cavity 6 after being stressed, and the spring member 7 is compressed to enable the buffer member to have compression elasticity and provide buffering force.

The above description is only of the preferred embodiments of the present utility model and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (8)

1. The utility model provides a bent axle milling flutes positioning fixture with buffer structure, includes frame (1), locates clamping mechanism (2) of frame (1) top, clamping mechanism (2) are including opposite activity clamp splice (3) that set up on frame (1), drive two clamp splice (3) are close to or drive mechanism (4) that keep away from its characterized in that in step: two equal sliding connection has bolster (5) on clamp splice (3) opposite face, inside is equipped with cavity (6) that supply bolster (5) back and forth movement, be equipped with spring piece (7) between bolster (5) and clamp splice (3), spring piece (7) are close to and drive bolster (5) in step and support when establishing on the crank in the middle of two clamp splice (3), provide the buffer force for bolster (5) simultaneously.

2. The crankshaft milling groove positioning fixture with the buffer structure according to claim 1, wherein: the clamp splice (3) comprises first half clamp splice (31) and second half clamp splice (32), cavity (6) divide into preceding cavity (61) and back cavity (62) that are located second half clamp splice (32) of running through first half clamp splice (31), back cavity (62) highly are higher than preceding cavity (61), buffer (5) divide into buffer head (51), slide bar portion (52), butt portion (53) one end is leaned on first half clamp splice (31), the other end butt spring piece (7), on cavity (62) inner wall behind spring piece (7) other end rigid coupling.

3. The crankshaft milling groove positioning fixture with the buffer structure according to claim 2, wherein: the distance between the buffer head (51) and the front half clamping block (31) is not greater than the distance that the abutting part (53) can move back and forth in the rear cavity (62).

4. A crankshaft milling groove positioning fixture with a buffer structure according to claim 3, characterized in that: the buffer head (51) is a curved plate, and the wall surface of the front half clamping block (31) close to the buffer head (51) is a curved surface which is matched with the radian of the buffer head (51).

5. The crankshaft milling groove positioning fixture with the buffer structure according to any one of claims 2-4, wherein: the material of the buffer head (51) is elastic.

6. The crankshaft milling groove positioning fixture with the buffer structure according to claim 1, wherein: two clamp splice (3) pass through slide rail assembly (8) with frame (1) sliding connection, slide rail assembly (8) are including slide rail (81) and slide (82) that the cooperation was used, slide (81) set firmly in clamp splice (3) below, actuating mechanism (4) are including setting firmly driving motor (41) on frame (1), being located in the middle of two clamp splice (3) and with frame (1) connecting piece (42) of rotating and being connected, connecting piece (42) both ends still rotate with two clamp splice (3) respectively and are connected, the output shaft of driving motor (41) is parallel with slide rail (81) direction, and with a slide (82) rigid coupling.

7. The crankshaft milling groove positioning fixture with the buffer structure according to claim 6, wherein: the highest point of the connecting piece (42) is not higher than the lowest point of the buffer piece (5), and the lowest point of the connecting piece (42) is higher than the highest point of the sliding rail (81).

8. The crankshaft milling groove positioning fixture with the buffer structure according to claim 1, wherein: the telescopic lifting device is characterized by further comprising a left support (9) and a right support (10) which are perpendicular to the mounting direction of the two clamping blocks (3) and arranged on the machine base (1), wherein a fixed thimble (11) is arranged on the left support (9), a movable thimble (12) is correspondingly arranged on one side surface of the right support (10), a driving source is arranged on the other side surface of the right support, and the driving source is used for adjusting the telescopic quantity of the movable thimble (12).