A clamping tool for machining the center arc and the two side faces of a main bearing cover

Abstract

This utility model discloses a clamping fixture for machining the central arc and two sides of a main bearing cap, belonging to the field of main bearing cap machining technology, and solving the problem of slow machining efficiency in existing main bearing caps. The clamping fixture includes a mounting base plate with a clearance hole in the center. Slides are provided on both sides of the mounting base plate, and clearance grooves are formed on the slides. Moving blocks slide within the clearance grooves. Double-ended threaded rods are rotatably mounted on both slides. The moving blocks are threaded to both ends of the double-ended threaded rods. Pressure plates for pressing the main bearing cap are provided on the moving blocks. Limiting blocks are provided on both pressure plates, and arc-shaped grooves adapted to the two arc-shaped edges of the main bearing cap are formed on the limiting blocks. This clamping fixture for machining the central arc and two sides of a main bearing cap can improve machining efficiency while ensuring machining quality.

Description

Technical Field

[0001] This utility model relates to the field of main bearing cover processing technology, and in particular to a clamping fixture for processing the central arc and two sides of the main bearing cover. Background Technology

[0002] The main bearing cap is a part that is mounted on the main bearing support diaphragm of the cylinder block or crankcase and is used as half of the main bearing housing.

[0003] The main bearing cap is usually produced by casting, and the mold used is split in half on both sides. Due to sand expansion and misalignment during the casting process, the parts are asymmetrical. When machining the middle arc and the two sides, the existing machining method usually uses single-sided positioning and then machining with a lathe tool. This machining method often results in asymmetrical machining of the two arcs, leading to a high scrap rate. In addition, this clamping method requires multiple clamping, resulting in low machining efficiency and failing to meet the needs of large-scale production. Utility Model Content

[0004] The technical problem to be solved by this utility model is to address the above-mentioned shortcomings of the prior art by providing a clamping fixture for machining the central arc and two sides of the main bearing cover. This fixture can improve machining efficiency while ensuring machining quality and has the characteristics of wide applicability and strong practicality.

[0005] The present invention employs a clamping fixture for machining the central arc and two sides of a main bearing cap. It includes a mounting base plate with a clearance hole in the center. Slides are provided on both sides of the mounting base plate, each slide having a clearance groove. A moving block slides within the clearance groove. Double-ended threaded rods rotate on both sides of the slides. The moving blocks are threaded to both ends of the double-ended threaded rods. Each moving block has a pressure plate for pressing the main bearing cap. Limiting blocks are provided on both pressure plates, each limiting block having an arc-shaped groove that matches the two arc-shaped edges of the main bearing cap. A support seat for supporting the main bearing cap is provided below the clearance hole.

[0006] As a further improvement, the slide block is provided with slide grooves on both the upper and lower sides, and a slider is slidably connected to the slide groove, and the slider is connected to the pressure plate.

[0007] Furthermore, a connecting block is provided between the movable block and the pressure plate, and the upper and lower sides of the connecting block are slidably connected to the slide block.

[0008] Furthermore, the double-ended threaded rod has threaded sections with opposite thread directions at both ends, and the movable block is mounted on the threaded sections.

[0009] Furthermore, a counterweight is provided on the mounting base plate above the clearance hole, and a detachable counterweight plate is provided on the counterweight.

[0010] Furthermore, the slide block is provided with a tool avoidance groove, and a clearance is provided between the side of the tool avoidance groove and the side of the main bearing cover, the clearance being 5-10cm.

[0011] Furthermore, one end of the double-threaded rod is provided with a hexagonal end.

[0012] Beneficial effects

[0013] Compared with the prior art, this utility model has the following advantages:

[0014] This utility model discloses a clamping fixture for machining the central arc and two sides of a main bearing cover. The entire device is mounted on a lathe via a mounting base plate. The main bearing cover is then placed on a support seat. A wrench is used to rotate a double-threaded rod, driving the moving blocks on both sides inwards. The moving blocks drive the connecting blocks, which in turn move the pressure plate. The pressure plate drives the limiting blocks, whose arc-shaped grooves engage with the arc-shaped structures on both sides of the main bearing cover, thus fixing the main bearing cover. A double-sided clamping method is used, with a pre-reserved space for tool entry on the inner side. The central arc and two sides of the main bearing cover can be machined using a lathe tool, eliminating the need for multiple clamping operations. Machining of all three sides can be completed in a single clamping operation, effectively improving machining efficiency and meeting the needs of mass production. It is convenient to use and has a wide range of applications. Attached Figure Description

[0015] Figure 1 This is a three-dimensional structural diagram of the present invention;

[0016] Figure 2 This is a schematic diagram of the main structure of this utility model;

[0017] Figure 3 This is a side view of the structure of this utility model;

[0018] Figure 4 This is a schematic diagram of the structure behind the concealed pressure plate and connecting plate of this utility model.

[0019] The components are: 1-mounting base plate, 2-clearance hole, 3-slide block, 4-clearance groove, 5-moving block, 6-double-ended threaded rod, 7-slider, 8-slide groove, 9-hexagonal end, 10-connecting block, 11-pressure plate, 12-counterweight block, 13-counterweight plate, 14-knife avoidance groove, 15-limiting block, 16-main bearing cover, 17-support seat. Detailed Implementation

[0020] The present invention will be further described below with reference to specific embodiments shown in the accompanying drawings.

[0021] See Figure 1-4 As shown, this utility model discloses a clamping fixture for machining the central arc and two sides of a main bearing cap. It includes a mounting base plate 1 with a clearance hole 2 in the center. Slides 3 are provided on both sides of the mounting base plate 1, each slide 3 having a clearance groove 4. Moving blocks 5 slide within the clearance groove 4. Double-ended threaded rods 6 rotatably rotate on both slides 3. The moving blocks 5 are threaded to both ends of the double-ended threaded rods 6. Pressure plates 11 for pressing the main bearing cap 16 are provided on the moving blocks 5. Limiting blocks 15 are provided on both pressure plates 11, each limiting block 15 having an arc-shaped groove adapted to the two arc-shaped sides of the main bearing cap 16. A support seat 17 for supporting the main bearing cap 16 is provided below the clearance hole 2. The entire fixture is clamped by the mounting base plate 1. The main bearing cover 16 is mounted on a lathe and placed on a support base 17. Then, a wrench is used to turn the double-threaded rod 6. Under the action of the thread, the moving blocks 5 on both sides move inward. The moving blocks 5 drive the connecting blocks 10, and the connecting blocks 10 move together with the pressure plate 11. The pressure plate 11 drives the limiting block 15. The arc-shaped groove of the limiting block 15 is locked on the arc-shaped structure on both sides of the main bearing cover 16, thereby fixing the main bearing cover 16. The double-sided clamping method is adopted, and the inner side is reserved for the tool infeed. The middle arc and both sides of the main bearing cover 16 can be machined by the lathe tool. There is no need for multiple clamping. The machining of three sides can be completed in one clamping, which effectively improves the machining efficiency and meets the needs of mass production.

[0022] Specifically, the slide block 3 has slide grooves 8 on both the upper and lower sides, and a slider 7 is slidably connected to the slide groove 8. The slider 7 is connected to the pressure plate 11. The slider 7 moves on the slide groove 8 and plays a guiding role, making the movement of the pressure plate 11 more stable.

[0023] Priority is given to the connection block 10 between the moving block 5 and the pressure plate 11. The upper and lower sides of the connection block 10 are slidably connected to the slide block 3. The connection block 10 moves within the slide block 3, which serves as a limit and effectively prevents the pressure plate 11 from moving up and down. It also serves as a connection and guide.

[0024] Furthermore, the double-ended threaded rod 6 has threaded sections with opposite thread directions at both ends. The moving block 5 is installed on the threaded section. When the double-ended threaded rod 6 rotates, the moving blocks 5 on both sides move inward, thereby driving the arc groove of the limiting block 15 to clamp and fix the main bearing cover 16.

[0025] Furthermore, a counterweight 12 is provided on the mounting base plate 1 above the clearance hole 2, and a detachable counterweight plate 13 is provided on the counterweight 12. By installing the counterweight 12 and the counterweight plate 13, the weights at the upper and lower ends of the mounting base plate 1 are similar, and the center of rotation is close to the center of the mounting base plate 1, making the rotation more stable, reducing jumps, and achieving higher processing accuracy.

[0026] Furthermore, a tool avoidance groove 14 is provided on the slide 3, and a clearance space is provided between the side of the tool avoidance groove 14 and the side of the main bearing cover 16. The clearance space is 5 to 10 cm, so that the lathe tool can reach into the clearance space to process the inner side of the main bearing cover 16.

[0027] Furthermore, the double-ended threaded rod 6 has a hexagonal end 9 at one end, which makes it easy for the operator to turn the double-ended threaded rod 6 with a wrench.

[0028] In this embodiment, a clamping fixture for machining the central arc and two sides of a main bearing cover is used. The entire device is mounted on a lathe via a mounting base plate 1. The main bearing cover 16 is then placed on a support base 17. Next, a wrench is used to rotate the double-threaded rod 6. Under the action of the thread, the moving blocks 5 on both sides move inward. The moving blocks 5 drive the connecting block 10, which in turn moves the pressure plate 11. The pressure plate 11 drives the limiting block 15. The arc-shaped groove of the limiting block 15 engages with the arc-shaped structure on both sides of the main bearing cover 16, thus fixing the main bearing cover 16. A double-sided clamping method is used, with a pre-reserved space for tool entry on the inner side. The central arc and two sides of the main bearing cover 16 can be machined using a lathe tool. Multiple clamping operations are unnecessary; machining of all three sides can be completed in one clamping operation, effectively improving machining efficiency and meeting the needs of mass production. This utility model discloses a clamping fixture for machining the central arc and two sides of a main bearing cap. It can improve machining efficiency while ensuring machining quality, and has the characteristics of wide applicability and strong practicality.

[0029] The above description is only a preferred embodiment of the present utility model. It should be noted that for those skilled in the art, several modifications and improvements can be made without departing from the structure of the present utility model. These modifications and improvements will not affect the effectiveness of the present utility model or the practicality of the patent.

Claims

1. A clamping tool for machining a center arc and two side faces of a main bearing cap, characterized in that, The system includes a mounting base plate (1), which has a clearance hole (2) in the middle. Both sides of the mounting base plate (1) are provided with slides (3), and the slides (3) are provided with clearance grooves (4). A moving block (5) is slidably provided in the clearance grooves (4). Both sides of the slides (3) are provided with a double-headed threaded rod (6) that rotates together. The moving blocks (5) on both sides are threaded to both ends of the double-headed threaded rod (6). The moving blocks (5) are provided with pressure plates (11) for pressing the main bearing cover (16). Both sides of the pressure plates (11) are provided with limiting blocks (15). The limiting blocks (15) are provided with arc grooves that match the two arc edges of the main bearing cover (16). A support seat (17) for supporting the main bearing cover (16) is provided below the clearance hole (2).

2. The clamping tool for machining the center circular arc and the two side faces of the main bearing cover according to claim 1, characterized in that, The slide block (3) is provided with slide grooves (8) on both the upper and lower sides, and a slider (7) is slidably connected on the slide groove (8). The slider (7) is connected to the pressure plate (11).

3. The clamping tool for machining the center circular arc and the two side faces of the main bearing cover according to claim 1, characterized in that, A connecting block (10) is provided between the movable block (5) and the pressure plate (11), and the upper and lower sides of the connecting block (10) are slidably connected to the slide (3).

4. The clamping tool for machining the center circular arc and the two side faces of the main bearing cover according to claim 1, characterized in that, The double-ended threaded rod (6) has threaded sections with opposite thread directions at both ends, and the movable block (5) is installed on the threaded sections.

5. A clamping fixture for machining the central arc and two sides of a main bearing cap according to claim 1, characterized in that, A counterweight (12) is provided on the mounting base plate (1) above the clearance hole (2), and a detachable counterweight plate (13) is provided on the counterweight (12).

6. The clamping tool for machining the center circular arc and the two side faces of the main bearing cover according to claim 1, characterized in that, The slide (3) is provided with a knife-avoiding groove (14), and a space gap is provided between the side of the knife-avoiding groove (14) and the side of the main bearing cover (16), and the space gap is 5-10cm.

7. The clamping tool for machining the center circular arc and the two side faces of the main bearing cover according to claim 1, characterized in that, The double-threaded rod (6) is provided with a hexagonal end (9) at one end.

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