Band-type brake mechanism for AC five-axis linkage double swing heads

Abstract

The utility model relates to a band-type brake mechanism for AC five-axis linkage double swing heads, which belongs to the technical field of machine tool equipment and comprises a core shaft, a plurality of evenly distributed oil inlet paths are arranged on the inner side of the core shaft, an outer sleeve is arranged on the peripheral side of the core shaft, and a band-type brake component and a crossed roller bearing are mounted between the core shaft and the outer sleeve. The band-type brake component comprises an oil pressure assembly installed on the mandrel, a gland is installed at the top end of the oil pressure assembly, a copper sleeve is installed on the peripheral side of the oil pressure assembly in a sleeving mode, an annular groove is formed in the inner side of the copper sleeve, a deformation part is arranged on the outer side of the annular groove, and a friction plate is installed at the top end of an outer sleeve. The annular outer side of the friction plate is fixedly connected with the outer sleeve; according to the five-axis linkage machine tool, axial braking and radial braking are combined through matched arrangement of all parts, simultaneous two-way braking is achieved by controlling oil pressure of an oil way, a better braking effect can be achieved, and then the positioning precision and stability of the five-axis linkage machine tool are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of machine tool equipment, and in particular relates to a brake mechanism for an AC five-axis linkage double swing head. Background Art

[0002] In recent years, five-axis linkage CNC machining centers have been more and more widely used in various fields, mainly used to process special-shaped, complex or high-precision parts. The five-axis linkage double swing head is an important component of the five-axis linkage machine tool. The five-axis linkage double swing head includes the A axis and the C axis, and the brake mechanism installed on the C axis is used to control the rotation and braking of the axis; the existing brake forms on the C axis of the five-axis linkage double swing head include clamps, disc brakes, and wrap-around brakes. When the swing head brakes instantly, the above methods can only brake the swing head in a single axial or radial direction, and the price of the clamp brake system is relatively high, and the braking stability of the one-way disc brake and wrap-around brake system is poor, which will eventually affect the positioning accuracy and stability of the five-axis linkage machine tool. Utility Model Content

[0003] In order to solve the technical problems existing in the above-mentioned background technology, the utility model provides a brake mechanism for an AC five-axis linkage double swing head.

[0004] The purpose of the utility model can be achieved through the following technical solutions:

[0005] A brake mechanism for an AC five-axis linkage double swing head, comprising a core shaft, a plurality of evenly distributed oil inlet passages are opened on the inner side of the core shaft, a jacket is arranged on the circumference of the core shaft, and a brake component and a cross roller bearing are installed between the core shaft and the jacket;

[0006] The brake component includes a hydraulic component installed on a core shaft, a pressure cover is installed on the top of the hydraulic component, a copper sleeve is installed on the circumferential side of the hydraulic component, an annular groove is opened on the inner side of the copper sleeve, a deformation part is arranged on the outer side of the annular groove, a friction plate is installed on the top of the outer sleeve, and the outer side of the ring of the friction plate is fixedly connected to the outer sleeve.

[0007] Furthermore, the inner ring of the cross roller bearing is fixedly connected to the core shaft, and the outer ring of the cross roller bearing is fixedly connected to the outer sleeve.

[0008] Furthermore, the oil pressure assembly includes an oil cylinder fixedly connected to the core shaft, the oil cylinder is fixedly connected to the pressure cover, a piston is slidably connected in the oil chamber of the oil cylinder, the inner side of the friction plate ring is located between the piston and the pressure cover, and the oil cylinder is fixedly connected to the copper sleeve.

[0009] Furthermore, a plurality of evenly distributed springs are arranged between the piston and the gland, one end of the spring is located in a cylindrical groove provided at the top end of the piston, and the other end of the spring is in contact with the bottom surface of the gland.

[0010] Furthermore, the gap between the outer side of the copper sleeve and the inner side of the outer sleeve is 0.1 mm.

[0011] Furthermore, a gasket is arranged between the friction plate and the outer sleeve; by selecting gaskets of different thicknesses, the distance between the friction plate and the piston and the gland can be adjusted.

[0012] Furthermore, a plurality of evenly distributed oil distribution paths are provided in the oil cylinder, the inlet of the oil distribution path is connected to the oil inlet path, the outlet at one end of the oil distribution path is connected to the oil chamber of the oil cylinder, and the outlet at the other end of the oil distribution path is connected to the annular groove.

[0013] Beneficial effects:

[0014] The utility model firstly installs a friction plate at the output end of the oil pressure component, uses the piston to push the friction plate and the pressure cover to produce friction force, thereby realizing axial friction braking, and then installs a copper sleeve on the peripheral side of the oil pressure component, and provides an annular groove and a deformation part on the copper sleeve, when the deformation part is deformed, it can fit with the outer sleeve to produce friction force, thereby realizing radial friction braking, and finally, through the coordinated setting of the oil inlet path of the core shaft and the oil branch path in the oil cylinder, the generated oil pressure simultaneously controls the upward movement of the piston and the outward deformation of the copper sleeve, so that the above-mentioned axial and radial directions of force are generated at the same time, thereby realizing simultaneous two-way braking; the utility model breaks the principle of one-way braking of rotary functional components in the past, combines axial braking with radial braking, and performs two-way braking by controlling the oil pressure of the oil circuit, which can achieve better braking effect, thereby further improving the positioning accuracy and stability of the five-axis linkage machine tool. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions of the embodiments of the utility model, the drawings required for describing the embodiments are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0016] Figure 1 This is a stereoscopic diagram of a brake mechanism for an AC five-axis linkage double swing head according to the utility model;

[0017] Figure 2 This is a three-dimensional cross-sectional view of a brake mechanism for an AC five-axis linkage double swing head according to the utility model;

[0018] Figure 3 for Figure 2 A partial enlarged view of the middle A;

[0019] Figure 4This is a schematic diagram of the structure of the brake component of the utility model after the gland is hidden;

[0020] Figure 5 This is a schematic diagram of the structure of the oil pressure assembly of the utility model;

[0021] Figure 6 It is a structural schematic diagram of the copper sleeve of the utility model.

[0022] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0023] 1. Mandrel; 101. Oil inlet; 2. Outer sleeve; 3. Brake component; 301. Pressure cover; 302. Friction plate; 303. Washer; 304. Oil pressure assembly; 3041. Cylinder; 3042. Oil distribution circuit; 3043. Piston; 3044. Spring; 305. Copper sleeve; 3051. Annular groove; 3052. Deformation part; 4. Cross roller bearing. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] See also Figure 1-Figure 6 As shown, a brake mechanism for an AC five-axis linkage double swing head includes a core shaft 1, four evenly distributed oil inlet passages 101 are opened on the inner side of the core shaft 1, a jacket 2 is arranged on the circumference of the core shaft 1, a brake component 3 and a cross roller bearing 4 are installed between the core shaft 1 and the jacket 2, the inner ring of the cross roller bearing 4 is fixedly connected to the core shaft 1, and the outer ring of the cross roller bearing 4 is fixedly connected to the jacket 2;

[0026] The brake component 3 includes a hydraulic assembly 304, which includes a cylinder 3041. The cylinder 3041 is fixedly connected to the core shaft 1. A pressure cover 301 is fixedly connected to the top of the cylinder 3041. A piston 3043 is slidably connected in the oil chamber of the cylinder 3041. A plurality of evenly distributed springs 3044 are arranged between the piston 3043 and the pressure cover 301. One end of the spring 3044 is located in a cylindrical groove opened at the top of the piston 3043 and abuts against the bottom end of the cylindrical groove. The other end of the spring 3044 is fixedly connected to the pressure cover 301. The bottom surfaces are abutted against each other, a copper sleeve 305 is fixedly sleeved on the circumference of the oil cylinder 3041, an annular groove 3051 is provided on the inner side of the copper sleeve 305, a deformation part 3052 is provided on the outer side of the annular groove 3051, a clearance of 0.1mm is formed between the outer side of the copper sleeve 305 and the inner side of the outer sleeve 2, a friction plate 302 is provided on the top of the outer sleeve 2, the inner side of the friction plate 302 is located between the piston 3043 and the pressure cover 301, the outer side of the friction plate 302 is fixedly connected to the outer sleeve 2, and a gasket 303 is provided between the friction plate 302 and the outer sleeve 2;

[0027] Four evenly distributed oil distribution paths 3042 are provided in the oil cylinder 3041 . The inlet of the oil distribution path 3042 is connected to the oil inlet path 101 , the outlet at one end of the oil distribution path 3042 is connected to the oil chamber of the oil cylinder 3041 , and the outlet at the other end of the oil distribution path 3042 is connected to the annular groove 3051 .

[0028] Working principle:

[0029] When the brake mechanism of the utility model is used, the hydraulic oil enters the branch oil path 3042 through the oil inlet path 101 of the core shaft 1, and then enters the oil cylinder 3041 and the annular groove 3051 respectively. The oil pressure generated by the hydraulic oil in the oil cylinder 3041 lifts the piston 3043, and the spring 3044 is further compressed. The piston 3043 pushes the friction plate 302 to fit with the pressure cover 301, and a braking force is generated in the axial direction. At the same time, the oil pressure generated by the hydraulic oil in the annular groove 3051 squeezes and deforms the deformation part 3052 outward, and the gap between the outer side of the copper sleeve 305 and the outer sleeve 2 becomes smaller, until the outer side of the copper sleeve 305 abuts against the outer sleeve 2, and a braking force is generated in the radial direction, thereby achieving braking of the swing head in both the axial and radial directions at the same time;

[0030] When the C-axis needs to rotate, the supply of hydraulic oil is stopped, the oil pressure in the cylinder 3041 and the annular groove 3051 is lost, and the piston 3043 is pushed back into the cylinder 3041 under the rebound force of the spring 3044, the friction plate 302 is separated from the pressure cover 301, the deformed part 3052 of the copper sleeve 305 is restored, and the original gap between the outer side of the copper sleeve 305 and the outer sleeve 2 is restored, and the outer sleeve 2 and the core shaft 1 can rotate freely through the cross roller bearing 4.

[0031] In the description of the specification, the description with reference to the terms "one embodiment", "example", "specific example", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0032] The above contents are merely examples and explanations of the structure of the utility model. The technicians in the technical field may make various modifications or additions to the specific embodiments described or replace them in a similar manner. As long as they do not deviate from the structure of the utility model or exceed the scope defined in the claims, they should all fall within the protection scope of the utility model.

Claims

1. A brake mechanism for an AC five-axis linkage double swing head, comprising a core shaft (1), characterized in that: The inner side of the core shaft (1) is provided with a plurality of evenly distributed oil inlet passages (101); the peripheral side of the core shaft (1) is provided with an outer sleeve (2); and a brake component (3) and a cross roller bearing (4) are installed between the core shaft (1) and the outer sleeve (2); The brake component (3) comprises a hydraulic assembly (304) mounted on a core shaft (1), a pressure cover (301) being mounted on the top of the hydraulic assembly (304), a copper sleeve (305) being mounted on the circumferential side of the hydraulic assembly (304), an annular groove (3051) being provided on the inner side of the copper sleeve (305), a deformation portion (3052) being provided on the outer side of the annular groove (3051), a friction plate (302) being mounted on the top of the outer sleeve (2), and the outer side of the ring of the friction plate (302) being fixedly connected to the outer sleeve (2).

2. The brake mechanism for AC five-axis linkage double swing head according to claim 1, characterized in that: The inner ring of the cross roller bearing (4) is fixedly connected to the core shaft (1), and the outer ring of the cross roller bearing (4) is fixedly connected to the outer sleeve (2).

3. The brake mechanism for AC five-axis linkage double swing head according to claim 1, characterized in that: The oil pressure assembly (304) comprises an oil cylinder (3041) fixedly connected to the core shaft (1), the oil cylinder (3041) being fixedly connected to the pressure cover (301), a piston (3043) being slidably connected in the oil chamber of the oil cylinder (3041), the inner side of the ring of the friction plate (302) being located between the piston (3043) and the pressure cover (301), and the oil cylinder (3041) being fixedly connected to the copper sleeve (305).

4. The brake mechanism for AC five-axis linkage double swing head according to claim 3, characterized in that: A plurality of evenly distributed springs (3044) are arranged between the piston (3043) and the pressure cover (301), one end of the spring (3044) is located in a cylindrical groove opened at the top of the piston (3043), and the other end of the spring (3044) is in contact with the bottom surface of the pressure cover (301).

5. The brake mechanism for AC five-axis linkage double swing head according to claim 1, characterized in that: The gap between the outer side of the copper sleeve (305) and the inner side of the outer sleeve (2) is 0.1 mm.

6. The brake mechanism for AC five-axis linkage double swing head according to claim 1, characterized in that: A gasket (303) is provided between the friction plate (302) and the outer sleeve (2).

7. The brake mechanism for AC five-axis linkage double swing head according to claim 3, characterized in that: The oil cylinder (3041) is provided with a plurality of evenly distributed oil distribution paths (3042); the inlet of the oil distribution path (3042) is connected to the oil inlet path (101); the outlet at one end of the oil distribution path (3042) is connected to the oil chamber of the oil cylinder (3041); and the outlet at the other end of the oil distribution path (3042) is connected to the annular groove (3051).

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