A cylinder and cylinder head universal core clamp

Abstract

This utility model relates to a universal core clamping fixture for cylinder blocks and cylinder heads. The fixture includes a support, movable clamping arms, and a stroke detection component. A pair of movable clamping arms are mounted on the support and slidably connected to it. The two movable clamping arms are close to each other to clamp the sand core. The stroke detection component includes a limiting block, a swing block, and a limiting cylinder. The limiting block is fixedly mounted on one of the movable clamping arms. The first end of the swing block is hinged to the support. The limiting cylinder is mounted on the support, and its piston rod is connected to the swing block. The second end of the swing block is located on the path of the limiting block's movement to limit its displacement. This invention allows the limiting cylinder to rotate the swing block according to the length of the sand core, thereby changing the maximum position that the limiting block can move on the movable clamping arm. While ensuring that the fixture can adapt to sand cores of different lengths, it reduces the stroke of the two movable clamping arms and shortens the clamping time for small workpieces.

Description

Technical Field

[0001] This utility model relates to the technical field of tooling fixtures, and in particular to a universal lower core fixture for cylinder blocks and cylinder heads. Background Technology

[0002] Sand cores are materials used to manufacture mold cores in casting production, and are composed of casting sand, molding sand binder, etc. During the casting process, sand cores need to be placed in designated positions for subsequent casting operations. Traditionally, this requires manual labor using overhead cranes to lower the sand cores to a core lowering machine, which then transfers the sand cores to the sand box on the molding line. Because there are many types of sand cores, including cylinder head cores and cylinder block cores, with significant differences in length, existing core lowering machines require larger clamping cylinder strokes to accommodate different types of sand cores, resulting in low core lowering efficiency. Utility Model Content

[0003] (a) Technical problems to be solved

[0004] This utility model provides a universal core-lowering fixture for cylinder blocks and cylinder heads, addressing the problem of low core-lowering efficiency caused by the large stroke of the clamping cylinder.

[0005] (II) Technical Solution

[0006] To solve the above problems, this utility model provides a universal lower core clamp for cylinder blocks and cylinder heads, which includes: a bracket, a movable clamping arm, and a stroke detection component;

[0007] The support is provided with a pair of movable clamping arms, which are slidably connected to the support. The pair of movable clamping arms are close to each other to clamp the sand core.

[0008] The stroke detection component includes: a limiting block, a swing block, and a limiting cylinder; the limiting block is fixedly mounted on a movable clamping arm, the first end of the swing block is hinged to the bracket, the limiting cylinder is disposed on the bracket, and the piston rod of the limiting cylinder is connected to the swing block, the limiting cylinder is used to push the swing block to rotate; the second end of the swing block is located on the path of movement of the limiting block to limit the displacement of the limiting block.

[0009] Preferably, the universal lower core clamp for cylinder block and cylinder head further includes a synchronous drive mechanism;

[0010] The synchronous drive mechanism includes a drive gear and a pair of drive racks. The drive gear is rotatably mounted on the bracket, and the drive racks are slidably mounted on the bracket and mesh with the drive gear. The drive gear is located between the two drive racks.

[0011] The drive rack and the movable clamping arm are in one-to-one correspondence, and the drive rack is connected to the corresponding movable clamping arm.

[0012] Preferably, the universal lower core clamp for cylinder block and cylinder head further includes a cylinder block core clamping plate assembly;

[0013] The cylinder core clamping plate assembly includes: a cylinder core bottom plate and a limiting pin; the cylinder core bottom plate is mounted on the movable clamping arm, the cylinder core bottom plate is used to abut against the cylinder core, and the limiting pin protrudes from the surface of the cylinder core bottom plate abutting against the cylinder core.

[0014] Preferably, a first connecting hole for connecting with the movable clamping arm is provided through the cylinder core bottom plate.

[0015] Preferably, a first silicone pad is provided on the surface of the cylinder core bottom plate that abuts against the cylinder core.

[0016] Preferably, the universal lower core clamp for cylinder block and cylinder head further includes a cylinder head core clamping plate assembly;

[0017] The cylinder head core clamping plate assembly includes: a cylinder head core bottom plate and a limiting plate; the cylinder head core bottom plate is fixedly connected to the movable clamping arm, and a pair of limiting plates are provided on the cylinder head core bottom plate; when the cylinder head core bottom plate abuts against the cylinder head core, the cylinder head core is located between the two limiting plates.

[0018] Preferably, a second silicone pad is provided on the surface of the cylinder head core bottom plate that abuts against the cylinder head core.

[0019] Preferably, a second connecting hole for connecting with the movable clamping arm is provided through the cylinder head core bottom plate.

[0020] (III) Beneficial Effects

[0021] This invention can use a limit cylinder to push the swing block to rotate according to the length of the sand core, thereby changing the limit position that the upper limit block of the moving clamping arm can move. While ensuring that the fixture of this application can adapt to sand cores of different lengths, it reduces the stroke of the two moving clamping arms, shortens the clamping time of small workpieces, and improves the core setting efficiency. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the overall structure of the universal lower core clamp for cylinder block and cylinder head of this utility model;

[0023] Figure 2 for Figure 1 Enlarged view at point A;

[0024] Figure 3 This is a top view of the universal lower core clamp for cylinder blocks and cylinder heads of this utility model;

[0025] Figure 4 This is a schematic diagram of the cylinder core clamping plate assembly of this utility model;

[0026] Figure 5 This is a schematic diagram of the cylinder head core clamping plate assembly of this utility model.

[0027] [Explanation of Labels in the Attached Images]

[0028] 1: Bracket; 2: Moving clamping arm; 3: Stroke detection component; 31: Limiting block; 32: Swinging block; 33: Limiting cylinder; 4: Synchronous drive mechanism; 41: Drive gear; 42: Drive rack; 5: Cylinder core clamping plate assembly; 51: Cylinder core bottom plate; 52: Limiting pin; 53: First connecting hole; 54: First silicone pad; 6: Cylinder head core clamping plate assembly; 61: Cylinder head core bottom plate; 62: Limiting plate; 63: Second silicone pad; 64: Second connecting hole. Detailed Implementation

[0029] To better explain and facilitate understanding of this utility model, the present utility model will be described in detail below with reference to the accompanying drawings and specific embodiments.

[0030] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0031] Furthermore, in this utility model, the use of terms such as "first," "second," etc., is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this utility model, "multiple" means at least two, such as two, three, etc., unless otherwise explicitly specified.

[0032] In this utility model, unless otherwise explicitly specified and limited, the terms "connection," "fixing," etc., should be interpreted broadly. For example, "fixing" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0033] This utility model provides a universal core clamp for cylinder blocks and cylinder heads. The universal core clamp for cylinder blocks and cylinder heads includes: a bracket 1, movable clamping arms 2, and a stroke detection component 3. A pair of movable clamping arms 2 are provided on the bracket 1, and the movable clamping arms 2 are slidably connected to the bracket 1. The pair of movable clamping arms 2 are close to each other to clamp the sand core. The stroke detection component 3 includes: a limiting block 31, a swing block 32, and a limiting cylinder 33. The limiting block 31 is fixedly installed on a movable clamping arm 2. The first end of the swing block 32 is hinged to the bracket 1. The limiting cylinder 33 is provided on the bracket 1, and the piston rod of the limiting cylinder 33 is connected to the swing block 32. The limiting cylinder 33 is used to push the swing block 32 to rotate. The second end of the swing block 32 is located on the path of movement of the limiting block 31 to limit the displacement of the limiting block 31.

[0034] In the technical solution of this utility model, the movable clamping arm 2 moves, driving the limiting block 31 to move. When the movable clamping arm 2 reaches its limit, the limiting block 31 contacts the second end of the swing block 32. After the second end of the swing block 32 abuts against the limiting block 31, the swing block 32 will generate a tendency to rotate along its first end, thereby compressing the limiting cylinder 33. When a change in pressure is detected in the compression cylinder, the movement of the movable clamping arm 2 is restricted, thus completing the early warning of the movement of the movable clamping arm 2. This application can use the limiting cylinder 33 to push the swing block 32 to rotate according to the length of the sand core, thereby changing the limit position that the limiting block 31 of the movable clamping arm 2 can move. While ensuring that the fixture of this application can adapt to sand cores of different lengths, the stroke of the two movable clamping arms 2 is reduced, the clamping time of small workpieces is shortened, and the core removal efficiency is improved.

[0035] Furthermore, the universal lower core clamp for cylinder blocks and cylinder heads also includes a synchronous drive mechanism 4. The synchronous drive mechanism 4 includes a drive gear 41 and a pair of drive racks 42. The drive gear 41 is rotatably mounted on the bracket 1, and the drive racks 42 are slidably mounted on the bracket 1, meshing with the drive gear 41. The drive gear 41 is located between the two drive racks 42. Each drive rack 42 corresponds to a movable clamping arm 2, and the drive rack 42 is connected to its corresponding movable clamping arm 2. In the gear and rack centering mechanism, the drive gear 41 is centrally located, and the two drive racks 42 mesh with it on both sides, respectively installed at the movable clamping arms 2 on both sides. A cylinder drives one of the movable clamping arms 2 to perform synchronous reciprocating motion. Compared to a single-sided clamping mechanism, this significantly reduces the overall length and stroke of the moving side, greatly reducing the overall weight of the clamp and ensuring the load capacity of the robot arm.

[0036] In one embodiment, when this application is used to clamp a cylinder core, the universal lower core clamp for cylinder blocks and cylinder heads further includes a cylinder core clamping plate assembly 5; the cylinder core clamping plate assembly 5 includes: a cylinder core base plate 51 and a limiting pin 52; the cylinder core base plate 51 is mounted on the movable clamping arm 2, and the cylinder core base plate 51 is used to abut against the cylinder core, and the limiting pin 52 protrudes from the surface of the cylinder core base plate 51 that abuts against the cylinder core. Because the cylinder core is relatively heavy, this application provides a limiting pin 52 protruding from the cylinder core clamping plate, and uses the limiting pin 52 to insert into the hole provided on the cylinder core, thereby supporting the weight of the cylinder core and improving stability.

[0037] Furthermore, a first connecting hole 53 for connecting with the movable clamping arm 2 is provided through the cylinder core base plate 51. A fastener is passed through the first connecting hole 53 and screwed onto the movable clamping arm 2, enabling a detachable connection between the cylinder core base plate 51 and the movable clamping arm 2, facilitating subsequent replacement. A first silicone pad 54 is provided on the surface of the cylinder core base plate 51 that abuts against the cylinder core. The first silicone pad 54 is placed between the cylinder core base plate 51 and the cylinder core to prevent the two movable clamping arms 2 from getting too close together and damaging the cylinder core.

[0038] In another embodiment, when this application is used to clamp the cylinder head core, the universal cylinder block and cylinder head lower core clamp also includes a cylinder head core clamping plate assembly 6. The cylinder head core clamping plate assembly 6 includes: a cylinder head core base plate 61 and limiting plates 62; the cylinder head core base plate 61 is fixedly connected to the movable clamping arm 2, and a pair of limiting plates 62 protrude from the cylinder head core base plate 61. When the cylinder head core base plate 61 abuts against the cylinder head core, the cylinder head core is located between the two limiting plates 62. Because the cylinder head core is relatively light and thin, when clamping the cylinder head core, the sidewall of the cylinder head core is positioned between the two limiting plates 62 to achieve clamping.

[0039] Finally, a second silicone pad 63 is provided on the surface of the cylinder head core base plate 61 that abuts against the cylinder head core. A second connecting hole 64 for connecting with the movable clamping arm 2 is provided through the cylinder head core base plate 61.

[0040] It should be understood that the above description of the specific embodiments of this utility model is only for illustrating the technical route and features of this utility model, and its purpose is to enable those skilled in the art to understand the content of this utility model and implement it accordingly. However, this utility model is not limited to the specific embodiments described above. All changes or modifications made within the scope of the claims of this utility model should be covered by the protection scope of this utility model.

Claims

1. A universal lower core clamp for cylinder blocks and cylinder heads, characterized in that, The universal lower core clamp for cylinder block and cylinder head includes: a bracket (1), a movable clamping arm (2), and a stroke detection component (3); The bracket (1) is provided with a pair of movable clamping arms (2), the movable clamping arms (2) are slidably connected to the bracket (1), and the pair of movable clamping arms (2) are close to each other to clamp the sand core; The stroke detection component (3) includes: a limiting block (31), a swing block (32), and a limiting cylinder (33); the limiting block (31) is fixedly installed on a movable clamping arm (2), the first end of the swing block (32) is hinged to the bracket (1), the limiting cylinder (33) is disposed on the bracket (1), and the piston rod of the limiting cylinder (33) is connected to the swing block (32), the limiting cylinder (33) is used to push the swing block (32) to rotate; the second end of the swing block (32) is located on the path of the moving limiting block (31) to limit the displacement of the limiting block (31).

2. The universal lower core clamp for cylinder blocks and cylinder heads as described in claim 1, characterized in that, The universal lower core clamp for cylinder block and cylinder head also includes a synchronous drive mechanism (4); The synchronous drive mechanism (4) includes a drive gear (41) and a pair of drive racks (42). The drive gear (41) is rotatably mounted on the bracket (1), and the drive racks (42) are slidably mounted on the bracket (1). The drive racks (42) mesh with the drive gear (41), and the drive gear (41) is located between the two drive racks (42). The drive rack (42) and the movable clamping arm (2) are in one-to-one correspondence, and the drive rack (42) is connected to the corresponding movable clamping arm (2).

3. The cylinder, cylinder head universal core jig according to claim 1 or 2, characterized in that, The universal lower core clamp for cylinder block and cylinder head also includes a cylinder block core clamping plate assembly (5); The cylinder core clamping plate assembly (5) includes: a cylinder core bottom plate (51) and a limiting pin (52); the cylinder core bottom plate (51) is mounted on the movable clamping arm (2), the cylinder core bottom plate (51) is used to abut against the cylinder core, and the limiting pin (52) protrudes from the surface of the cylinder core bottom plate (51) abutting against the cylinder core.

4. The cylinder, cylinder head universal core jig of claim 3, wherein, A first connection hole (53) for connecting with the movable clamping arm (2) is provided through the cylinder core bottom plate (51).

5. The cylinder, cylinder head universal core jig of claim 3, wherein, A first silicone pad (54) is provided on the surface of the cylinder core bottom plate (51) that abuts against the cylinder core.

6. The universal lower core clamp for cylinder blocks and cylinder heads as described in claim 1 or 2, characterized in that, The universal lower core clamp for cylinder block and cylinder head also includes a cylinder head core clamping plate assembly (6); The cylinder head core clamping plate assembly (6) includes: a cylinder head core bottom plate (61) and a limiting plate (62); the cylinder head core bottom plate (61) is fixedly connected to the movable clamping arm (2), and a pair of limiting plates (62) are provided on the cylinder head core bottom plate (61). When the cylinder head core bottom plate (61) abuts against the cylinder head core, the cylinder head core is located between the two limiting plates (62).

7. The cylinder, cylinder head universal core jig of claim 6 wherein, A second silicone pad (63) is provided on the surface of the cylinder head core bottom plate (61) that abuts against the cylinder head core.

8. The cylinder, cylinder head universal core jig of claim 6, wherein, A second connecting hole (64) for connecting with the movable clamping arm (2) is provided through the cylinder head core bottom plate (61).

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