Oil pressure brake structure of rotary table

Abstract

The utility model discloses a rotary table oil pressure band brake structure which comprises a table top, a rotary core shaft, a bearing, a base body, a bottom plate, a band brake cylinder body, a band brake piece and a spherical pin roller, the bottom plate is fixed at the bottom of the base body, and the band brake cylinder body is of a hollow cylindrical structure, fixed on the bottom plate and arranged on the lower portion of the rotary core shaft in a sleeved mode. A brake piece is installed on the inner side wall of the brake cylinder body, an oil pressure channel is arranged on the bottom plate and the brake cylinder body in a communicating mode and corresponds to one side of the brake piece, and a spherical pin roller is arranged on the lower portion of the rotating mandrel and corresponds to the other side of the brake piece. The brake pad is supported open through the rollers, it is guaranteed that the holding brake pad is completely separated from a rotating structure, original sliding friction is changed into rolling friction, abrasion resistance is improved, and the service life is prolonged; the requirement on the material performance is reduced, and the use cost is reduced; during later replacement and maintenance, only the roller part needs to be replaced, the whole oil cylinder is prevented from being replaced, and the maintenance cost and the maintenance difficulty are reduced.

Description

Technical Field

[0001] The utility model relates to an oil pressure brake structure for a rotary worktable. Background Art

[0002] The existing technology of rotary tables on the market mostly adopts disc brakes, which use multi-layer steel brake pads to clamp the brake pads through the pressure of pressure cylinders, and transmit the pressure to the brake pads to generate friction for braking.

[0003] There are also embracing brakes, in which oil pressure is passed into the brake cylinder, and the brake pads hold the rotating structure tightly to achieve the braking effect. After the oil pressure is unloaded, the elastic rebound of the material creates a gap and loosens the rotating structure.

[0004] The prior art has the following defects:

[0005] 1. The disc brake has weaker braking force than the wraparound brake in the same space;

[0006] 2. The traditional brake pad structure rebounds completely based on the material characteristics, and the gap between it and the rotating structure is small, which is easy to damage and wear the brake pad and the rotating structure, and causes a short life;

[0007] 3. The traditional brake pad material structure cost and maintenance cost are high and difficult to replace. Utility Model Content

[0008] The main technical problem solved by the utility model is to provide a rotary table hydraulic brake structure, in which the brake pads are supported by rollers to ensure that the brake pads are completely separated from the rotating structure, so that the original sliding friction is converted into rolling friction, thereby improving wear resistance and service life; the brake pads are supported by rollers, which reduces the requirements on material properties and reduces the cost of use; during later replacement and maintenance, only the roller part needs to be replaced, avoiding the overall replacement of the oil cylinder, thereby reducing the maintenance cost and difficulty of maintenance.

[0009] In order to solve the above technical problems, a technical solution adopted by the utility model is: to provide a rotary worktable oil pressure brake structure, including a worktable table, a rotating spindle, a bearing, a base body, a bottom plate, a brake cylinder body, a brake pad and a spherical roller, the worktable table top is fixed to the top of the rotating spindle by screws, the rotating spindle is provided with a first step structure in an annular shape on the outside and is installed on the inner ring of the bearing, the base body is provided with a hollow cylindrical structure, the top of the inner wall of the base body is provided with a second step structure in an annular shape, the outer ring of the bearing is installed on the second step structure of the base body, the bottom plate is fixed to the bottom of the base body, the brake cylinder body is provided with a hollow cylindrical structure, is fixed on the bottom plate and is sleeved on the lower part of the rotating spindle, the brake pad is installed on the inner wall of the brake cylinder body, an oil pressure channel is connected to the bottom plate and the brake cylinder body and corresponds to one side of the brake pad, and a spherical roller is provided at the lower part of the rotating spindle and corresponds to the other side of the brake pad.

[0010] In a preferred embodiment of the present invention, at least one group of spherical rollers is provided.

[0011] In a preferred embodiment of the present invention, the spherical rollers are provided in two groups, upper and lower.

[0012] In a preferred embodiment of the present invention, any group of spherical rollers is provided with a plurality of spherical rollers which are evenly spaced and distributed around the rotating shaft core.

[0013] In a preferred embodiment of the present invention, two groups of transversely distributed threaded holes are equally spaced and arranged around the lower portion of the rotating shaft core.

[0014] In a preferred embodiment of the present invention, the spherical roller includes a fixed end, a spring and a roller.

[0015] In a preferred embodiment of the present invention, the fixed end is threadedly connected in the threaded hole, a roller is provided on the fixed end via a spring, and the roller protrudes outside the threaded hole to fit with the brake pad.

[0016] The beneficial effects of the utility model are as follows: the utility model points out a rotary table hydraulic brake structure, which supports the brake pads through rollers, ensures that the brake pads are completely separated from the rotating structure, and changes the original sliding friction into rolling friction, thereby improving wear resistance and service life; supporting the brake pads through rollers reduces the requirements on material properties and reduces the cost of use; during later replacement and maintenance, only the roller part needs to be replaced, avoiding the overall replacement of the oil cylinder, thereby reducing the maintenance cost and difficulty of maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative work, among which:

[0018] Figure 1 It is a cross-sectional view of a preferred embodiment of a rotary table hydraulic brake structure of the utility model. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention are described clearly and completely below. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] See also Figure 1 , the utility model embodiment includes:

[0021] A rotary table hydraulic brake structure comprises a table top 1, a rotating spindle 2, a bearing 3, a base body 4, a bottom plate 5, a brake cylinder 6, a brake pad 7 and a spherical roller.

[0022] The workbench surface 1 is fixed to the top of the rotating mandrel 2 by screws and serves as the final surface for carrying the workpiece.

[0023] The first stepped structure 8 having an annular shape on the outside of the rotating mandrel 2 is arranged and installed on the inner ring of the bearing 3 , so that the rotating mandrel 2 can rotate on the bearing 3 .

[0024] The base body 4 is in a hollow columnar structure and is used for supporting.

[0025] A second stepped structure 9 in an annular shape is provided on the top of the inner wall of the base body 4 , and the outer ring of the bearing 3 is mounted on the second stepped structure 9 of the base body 4 to provide fixed support for the bearing 3 .

[0026] The bottom plate 5 is fixed to the bottom of the base body 4 for bottom support.

[0027] The brake cylinder body 6 is a hollow cylindrical structure fixed on the base plate 5 and sleeved on the lower part of the rotating core shaft 2. The inner wall of the brake cylinder body 6 is installed with a brake pad 7. The base plate 5 and the brake cylinder body 6 are connected with an oil pressure channel 10 corresponding to one side of the brake pad 7. The external oil pressure enters the cavity between the brake cylinder body 6 and the brake pad 7 through the oil pressure channel 10. The brake pad 7 is a thin sheet structure, which can generate pressure and tensile deformation under the action of external oil pressure.

[0028] A spherical roller is provided at the lower part of the rotating core shaft 2 corresponding to the other side of the brake pad 7, and the brake pad 7 is reset after the brake is applied through the spherical roller.

[0029] At least one group of spherical rollers is provided. In the present application, two groups of spherical rollers are provided, upper and lower, for resetting the upper and lower sides of the brake pad 7 simultaneously.

[0030] Any group of spherical rollers is provided with a plurality of spherical rollers which are equally spaced and distributed around the rotating core shaft 2 for synchronous resetting on the annular surface.

[0031] Two groups of transversely distributed threaded holes 11 are evenly spaced around the lower part of the rotating core shaft 2 for mounting spherical rollers.

[0032] The spherical roller includes a fixed end 12, a spring 13 and a roller 14. The fixed end 12 is threadedly connected in the threaded hole 11 to ensure the fixation and stability of the entire spherical roller. The fixed end 12 is provided with a roller 14 protruding from the threaded hole 11 through the spring 13 to fit with the brake pad 7. The roller 14 adopts a spherical seat structure. The seat end is connected to the spring 13, and the spherical end is in contact with the brake pad 7 for rolling friction.

[0033] Working principle: External oil pressure enters the brake cylinder 6 through the oil pressure channel 10 via the bottom plate 5, and then enters the cavity between the brake cylinder 6 and the brake pad 7. The brake pad 7 generates pressure and tensile deformation, and squeezes the spring 13 through the front roller 14, so that the roller 14 is compressed, so that the brake pad 7 is fully in contact with the rotating core shaft 2, and the rotating core shaft 2 is tightly clamped to achieve the braking effect. When the external oil pressure is released, the spring 13 is reset, so that the front roller 14 is reset, and the brake pad 7 is pushed open, so that the contact surfaces are separated and the release action is completed.

[0034] Compared with the traditional structure, the gap between the brake pad 7 and the rotating core shaft 2 after the oil pressure is released can be controlled according to the installation position through the built-in spring 13 and roller 14 of the spherical roller, and the risk of contact is reduced compared with the traditional structure, which is converted into rolling friction of the rolling body, greatly improving the fatigue life of the brake pad 7. During later maintenance, it is only necessary to replace the spherical roller in time, and there is no need to replace the entire brake pad 7 in the traditional structure, which greatly reduces the maintenance cost.

[0035] In summary, the utility model discloses a rotary table hydraulic brake structure, in which the brake pads are supported by rollers, ensuring that the brake pads are completely separated from the rotating structure, so that the original sliding friction is converted into rolling friction, thereby improving wear resistance and service life; supporting the brake pads by rollers reduces the requirements on material properties and reduces the cost of use; during later replacement and maintenance, only the roller part needs to be replaced, avoiding the overall replacement of the oil cylinder, thereby reducing the maintenance cost and difficulty.

[0036] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A rotary table hydraulic brake structure, characterized in that: It includes a workbench surface, a rotating spindle, a bearing, a base body, a bottom plate, a brake cylinder body, a brake pad and a spherical roller, the workbench surface is fixed to the top of the rotating spindle by screws, the rotating spindle is provided with a first step structure in an annular shape on the outside and is installed on the inner ring of the bearing, the base body is provided with a hollow cylindrical structure, the top of the inner wall of the base body is provided with a second step structure in an annular shape, the outer ring of the bearing is installed on the second step structure of the base body, the bottom plate is fixed to the bottom of the base body, the brake cylinder body is provided with a hollow cylindrical structure, is fixed on the bottom plate and is sleeved on the lower part of the rotating spindle, the brake pad is installed on the inner wall of the brake cylinder body, an oil pressure channel is connected to the bottom plate and the brake cylinder body and corresponds to one side of the brake pad, and a spherical roller is provided at the lower part of the rotating spindle and corresponds to the other side of the brake pad.

2. The rotary table hydraulic brake structure according to claim 1 is characterized in that: At least one group of spherical rollers is provided.

3. The rotary table hydraulic brake structure according to claim 2 is characterized in that: The spherical rollers are provided in two groups, upper and lower.

4. The rotary table hydraulic brake structure according to claim 3 is characterized in that: Any group of spherical rollers is provided with a plurality of spherical rollers which are evenly spaced and distributed around the rotating shaft core.

5. The rotary table hydraulic brake structure according to claim 4 is characterized in that: Two groups of transversely distributed threaded holes are evenly spaced and arranged around the lower part of the rotating shaft core.

6. The rotary table hydraulic brake structure according to claim 5, characterized in that: The spherical roller includes a fixed end, a spring and a roller.

7. The rotary table hydraulic brake structure according to claim 6, characterized in that: The fixed end is threadedly connected in the threaded hole, and a roller is arranged on the fixed end through a spring. The roller is protrudingly arranged outside the threaded hole and fits with the brake pad.

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