Hydraulic automatic balancing device of cylindrical grinding machine pusher dog

Abstract

The utility model discloses a hydraulic automatic balancing device of cylindrical grinding machine pusher dogs, which comprises pusher dog bases symmetrically arranged on a grinding machine faceplate at equal intervals, pusher dogs are fixedly arranged on the two pusher dog bases, and the two pusher dogs are respectively arranged on two sides of a hoop. Transverse holes are formed in the side faces of the pusher dogs on the two sides, hydraulic assemblies are fixedly arranged in the transverse holes, the axes of the hydraulic assemblies are approximately perpendicular to the center line of the clamp, the hydraulic assemblies on the two sides are arranged in opposite directions, each hydraulic assembly comprises a plunger and a cylinder body, and the exposed heads of the plungers on the two sides are spherical and make close contact with the side faces of the clamp. The tails of the hydraulic assemblies on the two sides are connected through an oil pipe, and an oil injector is arranged on the oil pipe. According to the hydraulic automatic balancing device of the cylindrical grinding machine pusher dog, when a gap exists between a certain clamping jaw of a clamp and the pusher dog, the pusher dog automatically adjusts, eliminates the gap and recovers a tight contact state.

Description

Technical Field

[0001] This utility model relates to the field of grinding machine fixture technology, and in particular to a hydraulic automatic balancing device for the claws of an external cylindrical grinding machine. Background Technology

[0002] Cylindrical grinding machines have two jaws, symmetrically and equidistantly positioned on the faceplate. During grinding, both jaws are in constant contact with the two jaws of the clamp at the workpiece end, ensuring smooth workpiece rotation and guaranteeing high precision in roundness. However, when the clamp or jaws wear or deform, one jaw may not contact the grinding machine jaws, causing unstable workpiece rotation and a slight misalignment of the workpiece axis. This results in a larger roundness than required. The solution is typically to add shims (soft materials like rubber) between the jaws and the jaws to eliminate or reduce the clearance. Because the resulting clearance is usually very small, multiple adjustments to the thickness and grinding tests are required to achieve satisfactory results, making the process very cumbersome. Especially if the workpiece is not perfectly round during grinding, it may result in a scrap product. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide a hydraulic automatic balancing device for the claw of an external cylindrical grinding machine. When a gap appears between a certain claw of the clamp and the claw, the claw automatically adjusts to eliminate the gap and restore a tight contact state.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a hydraulic automatic balancing device for the claws of an external cylindrical grinding machine, including claw bases symmetrically and equidistantly arranged on the grinding machine facet, with claws fixedly arranged on each of the two claw bases, and the two claws respectively arranged on both sides of the clamp. The sides of the claws on both sides are provided with transverse holes, and hydraulic components are fixedly arranged in the transverse holes. The axis of the hydraulic components is nearly perpendicular to the center line of the clamp, and the hydraulic components on both sides are arranged in opposite directions. The hydraulic components include plungers, cylinders and nuts. The exposed heads of the plungers on both sides are spherical and are in close contact with the sides of the clamp. The tails of the hydraulic components on both sides are connected by oil pipes, and oil injectors are provided on the oil pipes.

[0005] A further improvement of this utility model is that: the end of the pawl is provided with a hexagonal prism, and the pawl is fixed to the pawl base by the hexagonal prism and two bolts.

[0006] A further improvement of this utility model is that: the center of the pawl base is provided with a polygonal hole composed of multiple equilateral hexagons rotated and superimposed, the circumcircle of the polygonal hole is the same as the hexagonal prism of the pawl, and the hexagonal prism can be inserted into any equilateral hexagonal hole to lock the pawl in the required direction and prevent it from rotating.

[0007] A further improvement of this utility model is that the spherical surface of the plunger head is coated with a wear-resistant rubber sheet.

[0008] The technological advancements achieved by this utility model due to the adoption of the above technical solution are as follows:

[0009] This invention solves the problem of out-of-roundness deviations in ground shaft parts caused by gaps between the clamp claws and the lever claws. When a gap occurs between one of the clamp claws and the lever claw, the pressure between the two plunger spherical surfaces and the claw will be unequal. Hydraulic oil will quickly flow to that side, pushing the plunger outward, reducing the gap with the claw, and restoring a tight contact. This ensures that the lever forces on both sides are always balanced. Furthermore, because the balancing is automatic at all times, manual adjustment during machine downtime is avoided, thus ensuring grinding production efficiency. Attached Figure Description

[0010] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0011] Figure 2 This is a schematic diagram of the claw base structure of this utility model;

[0012] Figure 3 This is a front view of the pawl structure;

[0013] Figure 4 This is a side view of the pawl structure;

[0014] Figure 5 This is a top view of the pawl structure;

[0015] Figure 6 This is a schematic diagram of the hydraulic component structure;

[0016] Among them, 1. Paw base, 1-1. Polygonal hole, 2. Paw, 2-1. Hexagonal prism, 2-2. Horizontal hole, 3. Hydraulic component, 3-1. Piston, 3-2. Cylinder, 3-3. Nut, 4. Oil pipe, 5. Oil injector, 6. Clamp. Detailed Implementation

[0017] The present invention will be further described in detail below with reference to embodiments:

[0018] like Figures 1 to 6As shown, a hydraulic automatic balancing device for the claws of an external cylindrical grinding machine includes claw bases 1 symmetrically and equidistantly arranged on the grinding machine facet. In one embodiment, the claw bases 1 are symmetrically fixed to the grinding machine facet by four bolts. Claws 2 are fixedly mounted on both claw bases 1. Each claw 2 has a hexagonal prism 2-1 at its end. The claws 2 are fixed to the claw bases 1 by the hexagonal prism 2-1 and two bolts. A polygonal hole 1-1, formed by the rotational superposition of multiple equilateral hexagons, is located at the center of the claw base 1. The circumcircle of the polygonal hole 1-1 is the same as that of the hexagonal prism 2-1 of the claw 2. The hexagonal prism 2-1 can be inserted into any of the equilateral hexagonal holes to lock the claw 2 in the desired direction and prevent it from rotating.

[0019] Two pawls 2 are respectively disposed on both sides of the clamp 6. Each pawl 2 has a transverse hole 2-2 on its side, and a hydraulic component 3 is fixedly disposed within the transverse hole 2-2. The axis of the hydraulic component 3 is nearly perpendicular to the center line of the clamp 6, and the hydraulic components 3 on both sides are oriented in opposite directions. The hydraulic component 3 includes a plunger 3-1, a cylinder 3-2, and a nut 3-3. The cylinder 3-2 is fixed to the pawl 2 by the nut 3-3. The exposed heads of the plungers 3-1 on both sides are spherical, making close contact with the side of the clamp 6 during grinding. The spherical surface of the plunger 3-1's head is coated with wear-resistant rubber to mitigate contact impact. The tail ends of the cylinders 3-2 of the hydraulic components 3 on both sides are connected by oil pipes 4. The oil pipes 4 are filled with hydraulic oil, and an injector 5 is disposed on the oil pipes 4 for injecting hydraulic oil into the oil pipes 4 and the hydraulic components 3.

[0020] When a gap appears between one of the jaws 1 and the claw 2 of the clamp 6, the contact pressure between the spherical surfaces of the two plungers 3-1 and the two jaws of the clamp 6 will be unequal. Hydraulic oil will then flow rapidly to that side, pushing the plunger 3-1 outwards, reducing the gap with the jaw 1 and restoring close contact. This ensures that the pulling force on both sides is always balanced. Furthermore, because the balancing is automatic at all times, manual adjustment during machine downtime is avoided, thus ensuring grinding production efficiency.

Claims

1. A hydraulic automatic balancing device for the jaws of an external cylindrical grinding machine, characterized in that: The device includes symmetrically and equidistantly arranged claw bases (1) on the grinding machine faceplate. Each claw base (1) is fixedly provided with claws (2). The two claws (2) are respectively arranged on both sides of the clamp (6). The sides of the claws (2) on both sides are provided with transverse holes (2-2) and hydraulic components (3) are fixedly arranged in the transverse holes (2-2). The axis of the hydraulic components (3) is nearly perpendicular to the center line of the clamp (6). The hydraulic components (3) on both sides are arranged in opposite directions. The hydraulic components (3) include plungers (3-1), cylinders (3-2) and nuts (3-3). The exposed heads of the plungers (3-1) on both sides are spherical and are in close contact with the sides of the clamp (6). The tails of the hydraulic components (3) on both sides are connected by oil pipes (4) and oil injectors (5) are provided on the oil pipes (4).

2. The hydraulic automatic balancing device for the jaws of an external cylindrical grinding machine according to claim 1, characterized in that: The end of the claw (2) is provided with a hexagonal prism (2-1), and the claw (2) is fixed to the claw base (1) by the hexagonal prism (2-1) and two bolts.

3. The hydraulic automatic balancing device for the jaws of an external cylindrical grinding machine according to claim 2, characterized in that: The center of the claw base (1) is provided with a polygonal hole (1-1) formed by rotating and stacking multiple equilateral hexagons. The circumcircle of the polygonal hole (1-1) is the same as the hexagonal prism (2-1) of the claw (2). The hexagonal prism (2-1) can be inserted into any equilateral hexagonal hole to lock the claw (2) in the desired direction and prevent it from rotating.

4. The hydraulic automatic balancing device for the jaws of an external cylindrical grinding machine according to claim 1, characterized in that: The head of the plunger (3-1) has a wear-resistant rubber sheet adhered to its spherical surface.

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