Crankshaft free end adjusting device

Abstract

The utility model provides a crankshaft free end adjusting device, which belongs to the technical field of crankshafts and comprises a crankshaft, positioning tiles are mounted at two ends of the crankshaft and comprise an upper positioning tile and a lower positioning tile, and one end of the upper positioning tile, one end of the lower positioning tile and the crankshaft are detachably and fixedly connected. The end, away from the crankshaft, of the upper positioning tile is connected with a flange plate, the upper positioning tile is movably connected with the flange plate in the radial direction of the flange plate, the end, away from the crankshaft, of the lower positioning tile is movably connected with the flange plate in the radial direction of the flange plate, and one face of the flange plate is detachably and fixedly connected with the flange end face of the crankshaft. A flange plate center hole is formed in the center of the other surface of the flange plate; and a dial indicator is arranged at one end, far away from the crankshaft, of the lower positioning tile. The adjusting device provided by the utility model is simple in structure, the free end of the crankshaft can be quickly adjusted, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of crankshafts, and particularly relates to a crankshaft free end adjusting device. Background Art

[0002] The crankshaft is the most important component in an engine, having several cranks and main bearing support points, and is usually made of a long strip of irregular metal material. The manufacturing and processing of the crankshaft is a complex process, involving multiple steps such as casting, forging, and precision machining, among which precision grinding in precision machining is an extremely important processing process. When the crankshaft is precision ground, it is necessary to center the machine tool center points against the center holes at both ends of the crankshaft and then perform processing. However, the precision requirements for precision grinding are relatively high. If the runout of the center hole relative to the crankshaft cannot be guaranteed, then the runout of the crankshaft after precision grinding cannot be guaranteed either. If the runout of the crankshaft after precision grinding cannot be guaranteed, then the crankshaft becomes a defective product.

[0003] Especially for large crankshafts, the precision requirements for their precision grinding are even higher. The length of large crankshafts is more than 1.5 meters, which to a certain extent increases the runout of the crankshaft center hole. If the runout of the crankshaft center hole is too large, it is necessary to place the crankshaft on a lathe and repeatedly trim the crankshaft center hole until the runout of the center hole meets the requirements, and the process is very cumbersome and the processing efficiency is low.

[0004] In view of this, we propose a crankshaft free end adjusting device. Content of the Utility Model

[0005] The purpose of the utility model is to provide a crankshaft free end adjusting device to solve the problems raised in the above background art.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The utility model provides a crankshaft free end adjusting device, including a crankshaft. Positioning tiles are installed at both ends of the crankshaft. The positioning tiles include an upper positioning tile and a lower positioning tile. One end of the upper positioning tile, one end of the lower positioning tile, and the crankshaft are detachably and fixedly connected. One end of the upper positioning tile away from the crankshaft is connected with a flange. The upper positioning tile is movably connected with the flange. One end of the lower positioning tile away from the crankshaft is movably connected with the flange. The moving direction of the flange is its radial direction. The flange is detachably and fixedly connected with the crankshaft. One side of the flange contacts the flange end face of the crankshaft. A flange center hole is provided at the center of the other side of the flange. A dial indicator is provided at one end of the lower positioning tile away from the crankshaft.

[0008] Further, the upper positioning tile includes an upper positioning portion and an upper connecting portion. The structure of the upper positioning portion is a semi-circular arc structure. The upper positioning portion is connected to the crankshaft. The upper positioning portion is provided at one end of the upper connecting portion. The end of the upper connecting portion away from the upper positioning portion is movably connected to the flange. A transverse groove is provided in the end of the upper connecting portion away from the upper positioning portion along the transverse direction of the upper connecting portion. The transverse groove divides the upper connecting portion at this end into an upper plate and a lower plate. A limiting groove is provided in the upper plate along the vertical direction of the upper connecting portion.

[0009] Further, first mounting blocks and second mounting blocks are provided on the outer periphery of the flange along the radial direction of the flange. The first mounting block and the second mounting block are arranged oppositely. An installation hole is provided in the first mounting block along the thickness direction of the flange. The end of the upper connecting portion away from the upper positioning portion is installed in the installation hole. An adjusting bolt hole is provided in the first mounting block along the radial direction of the flange. The end of the adjusting bolt hole communicates with the installation hole. The adjusting bolt includes a connected first shaft section, a second shaft section, and a third shaft section. The diameter of the first shaft section is the same as that of the third shaft section. The diameter of the second shaft section is smaller than that of the first shaft section. A thread is provided on the outer surface of the first shaft section. The first shaft section is installed in the adjusting bolt hole. The second shaft section is installed in the limiting groove. The third shaft section is installed in the transverse groove. The diameter of the second shaft section is smaller than the width of the limiting groove. The diameter of the third shaft section is larger than the width of the limiting groove. A slot is provided in the second mounting block along the thickness direction of the flange.

[0010] Further, the lower positioning tile includes a lower positioning portion and a lower connecting portion. The structure of the lower positioning portion is a semi-circular arc structure. The lower positioning portion is connected to the crankshaft. The lower positioning portion and the upper positioning portion are connected by a first bolt. The lower positioning portion and the upper positioning portion jointly clamp the crankshaft. The lower positioning portion is provided at one end of the lower connecting portion. The end of the lower connecting portion away from the lower positioning portion is installed in the slot. A fixed installation hole is provided in the end of the lower connecting portion away from the lower positioning portion along the vertical direction of the lower connecting portion. A dial indicator is installed in the fixed installation hole. The measuring head of the dial indicator points in the direction of the center of the flange. The dial indicator is connected to the lower connecting portion by a second bolt.

[0011] Further, flange bolt holes are provided on the outer periphery of the flange. The flange and the flange end face of the crankshaft are connected by a third bolt.

[0012] Further, a weight removal hole is provided on the flange. The weight removal hole is provided between the flange bolt holes and the flange center hole.

[0013] Compared with the prior art, the utility model has the following technical effects:

[0014] The crankshaft free end adjustment device provided by the utility model installs an upper positioning tile and a lower positioning tile at both ends of the crankshaft. The upper positioning tile and the lower positioning tile are fixedly connected to the crankshaft. The upper positioning tile and the lower positioning tile clamp the crankshaft. One end of the upper positioning tile away from the crankshaft is movably connected to the flange through an adjustment bolt, and one end of the lower positioning tile away from the crankshaft is movably connected to the flange. A flange center hole is opened at the center of the flange. A dial indicator is installed at one end of the lower positioning tile close to the flange. This adjustment device enables the flange center hole to replace the function of the crankshaft center hole. The flange can be adjusted up and down through the adjustment bolt, and the adjustment value is determined by the reading of the dial indicator, so that the flange center hole is adjusted to meet the requirements of the crankshaft runout, ensuring that the runout amount after precision grinding of the crankshaft is within the usage requirements. This adjustment device has a simple structure and can quickly complete the adjustment of the free end of the crankshaft. The crankshaft no longer needs to be placed on a lathe to repeatedly trim the crankshaft center hole, improving work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a schematic structural diagram of the crankshaft free end adjustment device according to an embodiment of the utility model;

[0016] Figure 2 is a right view of the crankshaft free end adjustment device according to an embodiment of the utility model;

[0017] Figure 3 is a schematic cross-sectional view of the crankshaft free end adjustment device according to an embodiment of the utility model in the B-B direction;

[0018] Figure 4 is a schematic structural diagram of the crankshaft free end adjustment device in the state of removing the positioning tiles according to an embodiment of the utility model;

[0019] Figure 5 is a schematic structural diagram of the upper positioning tile according to an embodiment of the utility model;

[0020] Figure 6 is a schematic structural diagram of the lower positioning tile according to an embodiment of the utility model;

[0021] Figure 7 is a schematic structural diagram of the adjustment bolt according to an embodiment of the utility model.

[0022] Description of the reference numerals: 1. crankshaft; 2. dial indicator; 3. positioning tile, 31. upper positioning tile, 311. upper positioning portion, 312. upper connecting portion, 313. transverse groove, 314. limiting groove, 315. upper plate, 316. lower plate, 32. lower positioning tile, 321. lower positioning portion, 322. lower connecting portion, 323. fixed mounting hole, 4. flange, 41. flange center hole, 42. weight removal hole, 43. flange bolt hole, 44. first mounting block, 45. second mounting block, 46. mounting hole, 47. adjusting bolt hole, 48. slot, 5. adjusting bolt, 51. first shaft section, 52. second shaft section, 53. third shaft section, 6. first bolt, 7. second bolt, 8. third bolt. Detailed implementation mode

[0023] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0024] Please refer to Figures 1 to 7 , this embodiment provides a crankshaft free end adjusting device, including a crankshaft 1. One end of the crankshaft 1 is the front end and the other end is the rear end. Positioning tiles 3 are installed at both ends. The positioning tile 3 includes an upper positioning tile 31 and a lower positioning tile 32. The upper positioning portion 311 of the upper positioning tile 31 and the lower positioning portion 321 of the lower positioning tile 32 are connected by a first bolt 6. The upper positioning portion 311 and the lower positioning portion 321 are jointly clamped on the main journal of the crankshaft 1 near the end by the first bolt 6. The upper positioning tile 31, the lower positioning tile 32 and the crankshaft 1 are detachably and fixedly connected.

[0025] Specifically, one end of the upper positioning tile 31 away from the crankshaft 1 is movably connected to the flange 4 by an adjusting bolt 5, and the adjusting bolt 5 can adjust the up-and-down movement of the flange 4. A dial indicator 2 is provided at one end of the lower positioning tile 32 away from the crankshaft 1, and this end is movably connected to the flange 4 along the radial direction of the flange 4. The flange 4 is detachably and fixedly connected to the crankshaft 1. One side of the flange 4 contacts the flange end face of the crankshaft 1, and a flange center hole 41 is provided at the center of the other side of the flange 4. The flange center hole 41 can penetrate the flange 4 or not penetrate the flange 4. In this embodiment, the flange center hole 41 does not penetrate the flange 4. This adjustment device makes the flange center hole 41 replace the function of the center hole of the crankshaft 1. By adjusting the up-and-down movement of the flange 4 with the adjusting bolt 5 and determining the adjustment value through the reading of the dial indicator 2, the flange center hole 41 is adjusted to meet the requirements of the runout of the crankshaft 1, ensuring that the runout of the crankshaft 1 after precision grinding is within the service requirements. The overall structure of this adjustment device is simple, and it can quickly complete the adjustment of the free end of the crankshaft 1. The crankshaft 1 no longer needs to be placed on a lathe to repeatedly trim the center hole of the crankshaft 1, improving work efficiency.

[0026] Specifically, the upper positioning tile 31 includes an upper positioning portion 311 and an upper connecting portion 312. The structure of the upper positioning portion 311 is a semi-circular arc structure, and the semi-circular arc structure can well clamp the main journal of the crankshaft 1. The upper positioning portion 311 is provided at one end of the upper connecting portion 312. One end of the upper connecting portion 312 away from the upper positioning portion 311 is movably connected to the flange 4. A transverse groove 313 is provided in the upper connecting portion 312 at one end away from the upper positioning portion 311 along the transverse direction of the upper connecting portion 312. The transverse groove 313 divides the upper connecting portion 312 at this end into an upper plate 315 and a lower plate 316. A limiting groove 314 is provided in the upper plate 315 along the vertical direction of the upper connecting portion 312. Along the radial direction of the flange 4, a first mounting block 44 and a second mounting block 45 are provided on the outer periphery of the flange 4. The first mounting block 44 and the second mounting block 45 are arranged opposite to each other. An installation hole 46 is provided in the first mounting block 44 along the thickness direction of the flange 4. One end of the upper connecting portion 312 away from the upper positioning portion 311 is inserted into the installation hole 46. The transverse dimension of the end of the upper connecting portion 312 is smaller than the transverse dimension of the installation hole 46, and the vertical dimension of the end of the upper connecting portion 312 is smaller than the vertical dimension of the installation hole 46. An adjusting bolt hole 47 is provided in the first mounting block 44 along the radial direction of the flange 4. The end of the adjusting bolt hole 47 is connected to the installation hole 46, and an adjusting bolt 5 is installed in the adjusting bolt hole 47. A slot 48 is provided in the second mounting block 45 along the thickness direction of the flange 4. One end of the lower connecting portion 322 away from the lower positioning portion 321 is inserted into the slot 48. The transverse dimension of the lower connecting portion 322 is smaller than the transverse dimension of the slot 48, and the vertical dimension of the lower connecting portion 322 is smaller than the vertical dimension of the slot 48.

[0027] Specifically, the adjusting bolt 5 includes three shaft segments connected in sequence, namely: the first shaft segment 51, the second shaft segment 52, and the third shaft segment 53. Among them, the diameter of the first shaft segment 51 is the same as that of the third shaft segment 53, the diameter of the second shaft segment 52 is smaller than that of the first shaft segment 51, the outer surface of the first shaft segment 51 is provided with threads, the first shaft segment 51 is installed in the adjusting bolt hole 47, the second shaft segment 52 is installed in the limiting groove 314, the third shaft segment 53 is installed in the transverse groove 313, the diameter of the second shaft segment 52 is smaller than the width of the limiting groove 314, and the diameter of the third shaft segment 53 is larger than the width of the limiting groove 314. During use, the operator uses a tool to turn the adjusting bolt 5. The third shaft segment 53 of the adjusting bolt 5 is located in the transverse groove 313 between the upper plate 315 and the lower plate 316, and the second shaft segment 52 is located in the limiting groove 314 of the upper plate. The adjusting bolt 5 can drive the positioning tile 3 to move up and down in the mounting hole 46, and then the positioning tile 3 drives the crankshaft 1 to move together until the runout between the flange center hole 41 on the flange plate 4 and the crankshaft 1 meets the requirements.

[0028] Specifically, the lower positioning tile 32 includes a lower positioning portion 321 and a lower connecting portion 322. The structure of the lower positioning portion 321 is a semi-circular arc structure, and the semi-circular arc structure can clamp the main journal of the crankshaft 1 well. The lower positioning portion 321 and the upper positioning portion 311 are connected by a first bolt 6, and the two jointly clamp the main journal of the crankshaft 1. The lower positioning portion 321 is provided at one end of the lower connecting portion 322, and the end of the lower connecting portion 322 away from the lower positioning portion 321 is inserted into the slot 48, and the lower connecting portion 322 can move up and down in the slot 48. A fixed mounting hole 323 is provided in the vertical direction of the lower connecting portion 322 at the end of the lower connecting portion 322 away from the lower positioning portion 321. A dial indicator 2 is installed in the fixed mounting hole 323. The measuring head of the dial indicator 2 points to the center direction of the flange plate 4. The dial indicator 2 is connected to the lower connecting portion 322 by a second bolt 7. The detection end of the dial indicator 2 passes through the fixed mounting hole 323 and contacts the flange plate 4. The reading of the dial indicator 2 is used to determine that the runout between the flange center hole 41 and the crankshaft 1 is within the use range.

[0029] Specifically, the flange plate 4 is provided with flange plate bolt holes 43 along its outer periphery. The flange end face of the flange plate 4 and the crankshaft 1 are connected by a third bolt 8. When installing the flange plate 4, the operator aligns the flange plate bolt holes 43 with the bolt holes on the flange end face of the crankshaft 1, and then inserts the third bolt 8 into the flange plate bolt holes 43 and the bolt holes on the crankshaft 1. Initially, the third bolt 8 does not need to be fully tightened, leaving a certain degree of adjustability until the runout between the flange center hole 41 and the crankshaft 1 is adjusted to meet the requirements. At this time, the third bolt 8 is tightened again.

[0030] Specifically, the flange 4 is provided with weight-removing holes 42. The purpose of setting the weight-removing holes 42 is to reduce the weight of the flange 4. The shape, quantity and setting position of the weight-removing holes 42 can be set according to the usage requirements. In this embodiment, the shape of the weight-removing holes 42 is circular, the quantity is set to four, and the weight-removing holes 42 are arranged between the flange bolt holes 43 and the flange center hole 41 of the flange.

[0031] Specifically, this embodiment describes the adjustment of the rear end of the crankshaft 1. The adjustment of the front end of the crankshaft 1 is the same as that of the rear end, which will not be elaborated here. The working principle of this adjustment device is as follows: during operation, first clamp the upper positioning tile 31 and the lower positioning tile 32 on the main journal at the rear end of the crankshaft 1, and then use the first bolt 6 to fix the upper positioning tile 31 and the lower positioning tile 32, so that the upper positioning tile 31 and the lower positioning tile 32 clamp the main journal of the crankshaft 1. After completion, first screw the adjustment bolt 5 into the adjustment bolt hole 47 of the flange 4, and then insert the upper connecting portion 312 into the mounting hole 46, so that the second shaft section 52 of the adjustment bolt 5 is installed into the limit groove 314, and the third shaft section 53 is installed into the transverse groove 313. Then make the flange 4 contact with the flange end face at the rear end of the crankshaft 1, and gently fix the flange 4 on the flange end face of the crankshaft 1 through the third bolt 8. At this time, it is not necessary to fully tighten the third bolt 8, and a certain adjustability should be reserved. Then fix the dial indicator 2 on the fixed mounting hole 323 of the lower connecting portion 322 through the second bolt 7. The adjustment device at the rear end of the crankshaft 1 is installed. Then turn the adjustment bolt 5 to move the flange 4 in the direction where the center hole of the crankshaft 1 needs to be adjusted, and determine the adjustment value through the reading of the dial indicator 2 until the flange center hole 41 is adjusted to meet the requirements of the runout of the crankshaft 1. After the adjustment is completed, tighten the third bolt 8 to completely fix the flange 4 on the flange end face at the rear end of the crankshaft 1. Subsequently, unscrew the adjustment bolt 5 and the first bolt 6, and draw out the upper positioning tile 31 and the lower positioning tile 32 from the side away from the flange end face at the rear end of the crankshaft 1. As Figure 4 shown, at this time, the flange center hole 41 replaces the center hole at the rear end of the crankshaft 1 for precision grinding.

[0032] Specifically, the upper positioning tile 31 and the lower positioning tile 32 are clamped on one end of the main journal at the rear end of the crankshaft 1 close to the rear flange end face, which is convenient for drawing out the positioning tile 3 after the adjustment is completed.

[0033] Although the present invention has been described in detail with reference to the foregoing embodiments, for those skilled in the art, they can still modify the technical solutions recorded in the foregoing embodiments, or perform equivalent replacements on some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A crankshaft free end adjustment device, characterized in that: The invention comprises a crankshaft (1), wherein both ends of the crankshaft (1) are provided with positioning bearings (3), wherein the positioning bearings (3) comprise an upper positioning bearing (31) and a lower positioning bearing (32), wherein one end of the upper positioning bearing (31), one end of the lower positioning bearing (32) and the crankshaft (1) are detachably fixedly connected, wherein the end of the upper positioning bearing (31) away from the crankshaft (1) is connected with a flange (4), wherein the upper positioning bearing (31) is movably connected with the flange (4), wherein the end of the lower positioning bearing (32) away from the crankshaft (1) is movably connected with the flange (4), wherein the movable direction of the flange (4) is radial, wherein the flange (4) is detachably fixedly connected with the crankshaft (1), wherein one side of the flange (4) contacts with the flange end face of the crankshaft (1), wherein a flange center hole (41) is provided at the center of the other side of the flange (4), and wherein a dial indicator (2) is provided at the end of the lower positioning bearing (32) away from the crankshaft (1).

2. The crankshaft free end adjustment device according to claim 1, characterized in that: The upper positioning shoe (31) comprises an upper positioning portion (311) and an upper connecting portion (312). The structure of the upper positioning portion (311) is a semicircular arc structure. The upper positioning portion (311) is connected to the crankshaft (1). The upper positioning portion (311) is arranged at one end of the upper connecting portion (312). The end of the upper connecting portion (312) away from the upper positioning portion (311) is movably connected to the flange (4). The end of the upper connecting portion (312) away from the upper positioning portion (311) is provided with a transverse groove (313) along the transverse direction of the upper connecting portion (312). The transverse groove (313) separates the upper connecting portion (312) at this end into an upper plate (315) and a lower plate (316). The upper plate (315) is provided with a limiting groove (314) along the vertical direction of the upper connecting portion (312).

3. The crankshaft free end adjustment device according to claim 2, characterized in that: The outer periphery of the flange (4) is provided with a first mounting block (44) and a second mounting block (45) along the radial direction of the flange (4); the first mounting block (44) is arranged opposite to the second mounting block (45); a mounting hole (46) is provided on the first mounting block (44) along the thickness direction of the flange (4); an end of the upper connecting portion (312) away from the upper positioning portion (311) is installed in the mounting hole (46); an adjustment bolt hole (47) is provided on the first mounting block (44) along the radial direction of the flange (4); the end of the adjustment bolt hole (47) is connected to the mounting hole (46); the adjustment bolt (5) comprises a first shaft section (51), a second shaft section (52) and a third shaft section (51) connected to each other. The first shaft segment (51) has a diameter that is the same as the diameter of the third shaft segment (53), the diameter of the second shaft segment (52) is smaller than the diameter of the first shaft segment (51), the outer surface of the first shaft segment (51) is provided with a thread, the first shaft segment (51) is threadedly installed in the adjustment bolt hole (47), the second shaft segment (52) is arranged in the limiting groove (314), the third shaft segment (53) is arranged in the transverse groove (313), the diameter of the second shaft segment (52) is smaller than the width of the limiting groove (314), the diameter of the third shaft segment (53) is larger than the width of the limiting groove (314), and the second mounting block (45) is provided with a slot (48) along the thickness direction of the flange (4).

4. The crankshaft free end adjustment device according to claim 3, characterized in that: The lower positioning shoe (32) comprises a lower positioning portion (321) and a lower connecting portion (322); the lower positioning portion (321) has a semicircular arc structure; the lower positioning portion (321) is connected to the crankshaft (1); the lower positioning portion (321) is connected to the upper positioning portion (311) via a first bolt (6); the lower positioning portion (321) and the upper positioning portion (311) clamp the crankshaft (1) together; the lower positioning portion (321) is arranged at one end of the lower connecting portion (322); One end of the lower connecting portion (322) away from the lower positioning portion (321) is installed in the slot (48); one end of the lower connecting portion (322) away from the lower positioning portion (321) is provided with a fixed installation hole (323) along the thickness direction of the lower connecting portion (322); a dial indicator (2) is installed in the fixed installation hole (323); the measuring head of the dial indicator (2) points to the center direction of the flange (4); and the dial indicator (2) is connected to the lower connecting portion (322) via a second bolt (7).

5. The crankshaft free end adjustment device according to claim 1, characterized in that: The flange (4) is provided with flange bolt holes (43) along the outer periphery, and the flange (4) is connected to the flange end surface of the crankshaft (1) via a third bolt (8).

6. The crankshaft free end adjustment device according to claim 5, characterized in that: The flange (4) is provided with a weight-removing hole (42), and the weight-removing hole (42) is arranged between the flange bolt hole (43) and the flange center hole (41).

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