Crankshaft grinding machine center frame

Abstract

The utility model relates to the technical field of crankshaft grinding machines, and provides a crankshaft grinding machine center frame which is characterized in that a frame body and a lower frame guide seat are fixedly arranged at the two ends of the top of a base respectively, a side frame plate is arranged between the frame body and the lower frame guide seat, the bottom of the side frame plate is connected with the base in a left-right rotating mode, and a side grabbing plate is connected to the upper portion of the side, close to the lower frame guide seat, of the side frame plate; the upper portion of the side frame plate is connected with the frame body in a left-right moving mode through a telescopic adjusting piece, a left-right penetrating groove hole is formed in the position, below the side grabbing plate, of the side frame plate, the side, close to the side frame plate, of the frame body is connected with a lower frame plate in an up-down rotating mode, and the free end of the lower frame plate penetrates through the groove hole and is arranged above the lower frame guide base through an up-moving adjusting mechanism. A bottom grabbing plate is fixedly arranged at the top of the free end of the lower frame plate, and the bottom grabbing plate and the side grabbing plates abut against the outer circle of the crankshaft main journal. The device is easy to manufacture, convenient to operate, compact in structure, suitable for crankshaft grinding machine machining space and beneficial to improving the machining precision of a machine tool.

Description

Technical Field

[0001] The utility model relates to the technical field of crankshaft grinding machines, and particularly relates to a steady rest for a crankshaft grinding machine. Background Art

[0002] As a special shaft component, the crankshaft has a large demand and various types. It is a key part on automobile engines and other internal combustion engines, with high material requirements and also high requirements for dimensional and geometric tolerances.

[0003] Among them, grinding processing plays an important role and has a crucial impact on the machining quality and production efficiency of the crankshaft. At present, in order to improve the concentration of the crankshaft process, a steady rest is mainly used as an auxiliary support to improve the stiffness and machining accuracy of the part.

[0004] When the precision grinding machine for big and small ends processes products, due to the installation of a pre-support, a hydraulic automatic shaft dialing mechanism, a runout measuring instrument and a scale measuring instrument on the machine tool bed, the space is narrow. It is difficult for a conventional steady rest to meet its installation space. Moreover, the shaft neck size tolerance of the Beier precision grinding machine for big and small ends is 0.015 mm (-0.005 - 0.01). In actual processing, due to the deformation caused by grinding force, the roundness is poor, and the deviation is 0.01 - 0.013 mm, resulting in partial runout exceeding the tolerance and a high quality risk. Therefore, there is an urgent need for a steady rest with a reasonable structure that can meet the installation space of the machine tool bed and can improve the machining accuracy of the machine tool. Content of the Utility Model

[0005] To solve the problems in the background art, the utility model proposes a steady rest for a crankshaft grinding machine, which is simple to manufacture, convenient to operate, compact in structure, suitable for the machining space of the crankshaft grinding machine, and helps to improve the machining accuracy of the machine tool.

[0006] To achieve the above object, the utility model adopts the following scheme:

[0007] A steady rest for a crankshaft grinding machine includes a base. At both ends of the top of the base, a frame body and a lower guide seat are respectively fixedly provided. A side frame plate is arranged between the frame body and the lower guide seat. The bottom of the side frame plate is rotatably connected to the base left and right. The upper part of the side frame plate near the lower guide seat is connected with a side gripper. The upper part of the side frame plate is movably connected to the frame body left and right through a telescopic adjusting member. A through slot is arranged on the side frame plate below the side gripper. One side of the frame body close to the side frame plate is rotatably connected with a lower plate. The free end of the lower plate passes through the slot and is arranged above the lower guide seat through an upward movement adjusting mechanism. A bottom gripper is fixedly provided at the top of the free end of the lower plate. The bottom gripper and the side gripper are in tight contact with the outer circle of the crankshaft main journal.

[0008] Furthermore, the telescopic adjusting member is a first hydraulic support cylinder. One end of the first hydraulic support cylinder is fixedly arranged at the upper part of the frame body close to the side frame plate, and the other end of the first hydraulic support cylinder is connected with the side frame plate in a left-right movable manner through an adjusting screw. A first return spring is also connected between the frame body and the side frame plate.

[0009] Furthermore, on the surface of the frame body close to the side frame plate, there are also two first connecting plates arranged oppositely before and after. The lower frame plate is connected with the two first connecting plates in a vertically rotatable manner through a first rotating shaft.

[0010] Furthermore, the top of the base is detachably connected with a second connecting plate, and the top of the second connecting plate is connected with the bottom of the side frame plate through a second rotating shaft.

[0011] Furthermore, the upward movement adjusting mechanism includes a rotating connecting member, a second hydraulic support cylinder and a lower frame guiding plate. The rotating connecting member is located between the frame body and the side frame plate. The rotating connecting member is respectively provided with an upper U-shaped groove and a lower U-shaped groove. The lower U-shaped groove is rotationally connected with the second connecting plate through a third rotating shaft, and the upper U-shaped groove is rotationally connected with one end of the lower frame guiding plate through a fourth rotating shaft. The free end of the lower frame guiding plate passes through the slot hole and is arranged between the lower frame guiding seat and the lower frame plate. One end of the second hydraulic support cylinder is fixedly arranged at the lower part of the frame body close to the side frame plate, and the other end of the second hydraulic support cylinder is connected with the lower frame guiding plate in a left-right movable manner through an adjusting screw; a lower convex arc portion is arranged at the top of the lower frame guiding seat, and an upper convex arc portion is arranged at the bottom of the free end of the lower frame plate. Upper inclined surfaces and lower inclined surfaces are respectively arranged on the upper and lower sides of the free end of the lower frame guiding plate. The upper inclined surfaces and the lower inclined surfaces intersect along the direction away from the fourth rotating shaft. The upper inclined surface can be in contact connection with the upper convex arc portion, and the lower inclined surface can be in contact connection with the lower convex arc portion. A second return spring is connected between the frame body and the rotating connecting member.

[0012] Furthermore, grooves are arranged on one sides of the bottom gripper plate and the side gripper plate close to the crankshaft main journal. Alloy blocks are clamped in the grooves, and the alloy blocks are abutted against the outer circle of the crankshaft main journal.

[0013] Furthermore, the top end surface of the lower frame plate connected with the bottom gripper plate is inclined along the direction close to the side frame plate.

[0014] The beneficial effects of the present utility model are as follows: Before grinding the crankshaft, the center rest pushes the side frame plate by adjusting the telescopic adjusting member, and pushes the lower frame plate by the upward adjusting mechanism, so that the side gripping plate of the side frame plate and the bottom gripping plate of the lower frame plate are respectively pressed against the outer circle of the crankshaft main journal. The contact clamping at two points plays an auxiliary supporting role during grinding. The operation is convenient and labor-saving. One person can complete the clamping of the crankshaft, improving the grinding efficiency of the crankshaft and thus enhancing the economic benefits of the enterprise. Moreover, this structure is simple to manufacture, convenient to operate, and compact in structure, suitable for the machining space of the crankshaft grinding machine, which helps to improve the machining accuracy of the machine tool. Brief Description of the Drawings

[0015] Figure 1 It is a schematic diagram of the overall structure of the present utility model;

[0016] Figure 2 It is a schematic side view structure diagram of the present utility model with a crankshaft main journal.

[0017] Reference numerals in the figure: 1, base; 101, second connecting plate; 102, second rotating shaft; 2, frame body; 201, telescopic adjusting member; 202, first rotating shaft; 203, first return spring; 204, first connecting plate; 3, lower frame guide seat; 301, lower convex arc part; 4, side frame plate; 401, side gripping plate; 402, slot hole; 5, lower frame plate; 501, bottom gripping plate; 502, upper convex arc part; 6, rotating connecting member; 601, upper U-shaped groove; 602, lower U-shaped groove; 7, second hydraulic support cylinder; 8, lower frame guide plate; 801, upper inclined surface part; 802, lower inclined surface part; 9, groove; 10, crankshaft main journal; 11, second return spring. Detailed Embodiment

[0018] In order to make the present utility model clearer and more understandable, the following further detailed description of the present utility model is provided in conjunction with the drawings and embodiments. It should be understood that the given embodiments are only one of the implementation manners and do not represent all embodiments.

[0019] Embodiment 1

[0020] Combined with Figure 1 - Figure 2The present embodiment provides a center frame of a crankshaft grinder, comprising a base 1, wherein two ends of the top of the base 1 are respectively fixed with a frame body 2 and a lower frame guide seat 3, a side frame plate 4 is arranged between the frame body 2 and the lower frame guide seat 3, the bottom of the side frame plate 4 is connected to the base 1 for left-right rotation, the upper part of the side frame plate 4 close to the lower frame guide seat 3 is connected with a side grab plate 401, the upper part of the side frame plate 4 is connected to the frame body 2 for left-right movement through a telescopic adjustment member 201, and a slot hole 402 penetrating left and right is arranged on the side frame plate 4 below the side grab plate 401, the frame body 2 is close to the side frame plate 4 and is connected with a lower frame plate 5 for up and down rotation, the free end of the lower frame plate 5 passes through the slot hole 402 and is arranged above the lower frame guide seat 3 through an upward adjustment mechanism, the top of the free end of the lower frame plate 5 is fixed with a bottom grab plate 501, and the bottom grab plate 501 and the side grab plate 401 are tightly abutted against the outer circle of the crankshaft main journal 10.

[0021] On the machine tool bed, the big and small heads of the crankshaft rely on the top point to press against the center hole to clamp the crankshaft, and the lever drives the crankshaft to rotate. Before grinding the crankshaft, the center frame in this embodiment pushes the side frame plate 4 by adjusting the telescopic adjustment member 201, and pushes the lower frame plate 5 by the upward adjustment mechanism so that the side grab plate of the side frame plate 4 and the bottom grab plate 501 of the lower frame plate 5 are respectively pressed against the outer circle of the crankshaft main journal 10, which play an auxiliary supporting role during grinding.

[0022] Specifically, the telescopic adjustment member 201 is a first hydraulic support cylinder, one end of which is fixedly mounted on the upper portion of the frame body 2 near the side frame plate 4, and the other end of the first hydraulic support cylinder is connected to the side frame plate 4 for left and right movement through an adjustment wire, and a first return spring 203 is also connected between the frame body 2 and the side frame plate 4. The first hydraulic support cylinder can extend the adjustment wire to push the upper portion of the side frame plate 4 toward the direction of the crankshaft to press against the side wall of the crankshaft main journal 10. When the components are retracted after grinding, the first return spring 203 can assist in the return of the side frame plate 4.

[0023] Specifically, two first connecting plates 204 are arranged front and rear oppositely on the surface of the frame body 2 close to the side frame plate 4 , and the two first connecting plates 204 are connected to the lower frame plate 5 for vertical rotation via a first rotating shaft 202 .

[0024] Specifically, the top of the base 1 is detachably connected with a second connecting plate 101, and the top of the second connecting plate 101 is connected to the bottom of the side frame plate 4 through a second rotating shaft 102. The second connecting plate 101 is provided to facilitate the disassembly and replacement of the side frame plate 4.

[0025] Specifically, the upward adjustment mechanism includes a rotating connecting member 6, a second hydraulic support cylinder 7, and a lower frame guide plate 8. The rotating connecting member 6 is located between the frame body 2 and the side frame plate 4. The rotating connecting member 6 is respectively provided with an upper U-shaped groove 601 and a lower U-shaped groove 602. The lower U-shaped groove 602 is rotationally connected to the second connecting plate 101 through a third rotating shaft. One end of the lower frame guide plate 8 is rotationally connected to the upper U-shaped groove 601 through a fourth rotating shaft. The free end of the lower frame guide plate 8 passes through the slot hole 402 and is arranged between the lower frame guide seat 3 and the lower frame plate 5. One end of the second hydraulic support cylinder 7 is fixedly arranged at the lower part of the frame body 2 close to the side frame plate 4. The other end of the second hydraulic support cylinder 7 is connected to the lower frame guide plate 8 in a left-right moving manner through an adjusting wire. The second hydraulic support cylinder 7 can extend the adjusting wire to push the lower frame guide plate 8 to move towards the lower frame guide seat 3.

[0026] The top of the lower frame guide seat 3 is provided with a lower convex arc portion 301. The bottom of the free end of the lower frame plate 5 is provided with an upper convex arc portion 502. The upper and lower sides of the free end of the lower frame guide plate 8 are respectively provided with an upper inclined surface portion 801 and a lower inclined surface portion 802. The upper inclined surface portion 801 and the lower inclined surface portion 802 intersect along the direction away from the fourth rotating shaft. The upper inclined surface portion 801 can be in contact connection with the upper convex arc portion 502. The lower inclined surface portion 802 can be in contact connection with the lower convex arc portion 301. A second return spring 11 is connected between the frame body 2 and the rotating connecting member 6, which can realize the reset of the lower frame guide plate 8. As the upper inclined surface portion 801 and the lower inclined surface portion 802 of the lower frame guide plate 8 move towards the lower frame guide seat 3, the lower frame guide seat 3 lifts the free end of the lower frame guide plate 8 to move upward, thereby driving the free end of the lower frame plate 5 to move upward. The bottom gripping plate 501 on the lower frame plate 5 abuts against the bottom wall of the crankshaft main journal 10. As a preferred solution, in this embodiment, the bottom gripping plate 501 and the side gripping plate 401 are both provided with grooves 9 on the side close to the crankshaft main journal 10. Alloy blocks are clamped in the grooves 9, and the alloy blocks are abutted against the outer circle of the crankshaft main journal 10. On the one hand, the alloy blocks protect the crankshaft. On the other hand, the alloy blocks themselves are wear-resistant, which can extend the service life of the center frame. On the other hand, the top end surface of the lower frame plate 5 connected to the bottom gripping plate 501 is inclined along the direction close to the side frame plate 4. When the bottom gripping plate 501 abuts against the outer circle of the crankshaft main journal 10, the bottom gripping plate 501 inclines towards the direction close to the side frame plate 4 along the inclined end surface at the top of the lower frame plate 5, which is beneficial to the contact clamping of the crankshaft main journal 10.

[0027] During use, before grinding the crankshaft, the first hydraulic pressure support cylinder can extend the adjusting wire to push the upper part of the side frame plate 4 towards the crankshaft to abut against the side wall of the crankshaft main journal 10. The second hydraulic pressure support cylinder 7 can extend the adjusting wire to push the lower frame guide plate 8 towards the lower frame guide seat 3. As the upper inclined surface part 801 and the lower inclined surface part 802 of the lower frame guide plate 8 move towards the lower frame guide seat 3, the lower frame guide seat 3 raises the free end of the lower frame guide plate 8 to move upwards, thereby driving the free end of the lower frame plate 5 to move upwards. The bottom gripper plate 501 on the lower frame plate 5 abuts against the bottom wall of the crankshaft main journal 10. At this time, the alloy blocks in the bottom gripper plate 501 and the side gripper plate 401 abut against the outer circle of the crankshaft main journal 10, realizing the auxiliary support of the center frame for the crankshaft.

[0028] The specific embodiments of the present invention have been described in detail above in conjunction with the drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present invention, various changes, modifications, substitutions, and variations made to these embodiments still fall within the protection scope of the present invention.

Claims

1. A crankshaft grinding machine center frame, comprising a base (1), characterized in that: The two ends of the top of the base (1) are respectively fixed with a frame body (2) and a lower frame guide seat (3); a side frame plate (4) is provided between the frame body (2) and the lower frame guide seat (3); the bottom of the side frame plate (4) is connected to the base (1) for left-right rotation; the upper part of the side frame plate (4) close to the lower frame guide seat (3) is connected to a side grab plate (401); the upper part of the side frame plate (4) is connected to the frame body (2) for left-right movement through a telescopic adjustment member (201); the side frame plate (4) is provided with a side grab plate (401) on the side frame plate (4) for left-right movement; 1), a slot hole (402) passing through left and right is provided below the frame body (2), a side of the frame body (2) close to the side frame plate (4) is connected to a lower frame plate (5) which can be rotated up and down, the free end of the lower frame plate (5) passes through the slot hole (402) and is arranged above the lower frame guide seat (3) through an upward adjustment mechanism, and a bottom grab plate (501) is fixed on the top of the free end of the lower frame plate (5), and the bottom grab plate (501) and the side grab plate (401) are tightly abutted against the outer circle of the crankshaft main journal (10).

2. The center frame of a crankshaft grinder according to claim 1, characterized in that: The telescopic adjustment member (201) is a first hydraulic support cylinder, one end of which is fixedly mounted on the upper portion of the frame body (2) close to the side frame plate (4), the other end of which is connected to the side frame plate (4) for left-right movement via an adjustment thread, and a first return spring (203) is also connected between the frame body (2) and the side frame plate (4).

3. The center frame of a crankshaft grinder according to claim 1, characterized in that: Two first connecting plates (204) are arranged front and rear oppositely on the surface of the frame body (2) close to the side frame plate (4), and the two first connecting plates (204) are connected to the lower frame plate (5) for vertical rotation via a first rotating shaft (202).

4. The center frame of a crankshaft grinder according to claim 1, characterized in that: The top of the base (1) is detachably connected to a second connecting plate (101), and the top of the second connecting plate (101) is connected to the bottom of the side frame plate (4) via a second rotating shaft (102).

5. The center frame of a crankshaft grinder according to claim 4, characterized in that: The upward adjustment mechanism comprises a rotating connection member (6), a second hydraulic support cylinder (7) and a lower frame guide plate (8); the rotating connection member (6) is located between the frame body (2) and the side frame plate (4); an upper U-shaped groove (601) and a lower U-shaped groove (602) are respectively provided on the rotating connection member (6); the lower U-shaped groove (602) is rotatably connected to the second connection plate (101) via a third rotating shaft; the upper U-shaped groove (601) is rotatably connected to one end of the lower frame guide plate (8) via a fourth rotating shaft; the free end of the lower frame guide plate (8) passes through the slot hole (402) and is arranged between the lower frame guide seat (3) and the lower frame plate (5); one end of the second hydraulic support cylinder (7) is fixedly arranged on the frame body (2) near the side frame plate (4). The lower part of the side, the other end of the second hydraulic support cylinder (7) is connected to the lower frame guide plate (8) for left and right movement through an adjustment wire; the top of the lower frame guide seat (3) is provided with a lower convex arc portion (301), the bottom of the free end of the lower frame plate (5) is provided with an upper convex arc portion (502), the upper and lower sides of the free end of the lower frame guide plate (8) are respectively provided with an upper inclined surface portion (801) and a lower inclined surface portion (802), the upper inclined surface portion (801) and the lower inclined surface portion (802) intersect in a direction away from the fourth rotating axis, the upper inclined surface portion (801) and the upper convex arc portion (502) can be contacted and connected, the lower inclined surface portion (802) and the lower convex arc portion (301) can be contacted and connected, and a second reset spring (11) is connected between the frame body (2) and the rotating connecting member (6).

6. The center frame of a crankshaft grinder according to claim 1, characterized in that: A groove (9) is provided on one side of the bottom gripping plate (501) and the side gripping plate (401) close to the crankshaft main journal (10). An alloy block is clamped in the groove (9), and the alloy block is tightly pressed against the outer circle of the crankshaft main journal (10).

7. The center frame of a crankshaft grinder according to claim 1, characterized in that: The top end surface of the lower frame plate (5) connected to the bottom gripping plate (501) is inclined in a direction close to the side frame plate (4).

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