Brake structure of large rotary table

Abstract

The utility model relates to a brake structure of a large rotary table, which comprises a base, the rotary table is rotatably arranged on the base, and a brake component is arranged between the rotary table and the base. The brake assembly comprises a module support, a connecting block protruding downwards is arranged on one side of the module support, a plurality of mounting holes are distributed in the circumference of the middle of the module support, and a plurality of oil supply channels are annularly distributed in the module support on one side of the mounting holes. Pistons are arranged at the upper end and the lower end of the mounting hole respectively, and brake pads matched with the pistons are arranged on the upper face and the lower face of the module support respectively. The brake assemblies are distributed in a multi-point modularized mode, modules are miniaturized, and the situations that a large workbench brake structure is large in size and difficult to machine are avoided; the brake assembly is hydraulically driven, the action is stable, the rotating table can be positioned and braked at any angle, the rotating shaft is not subjected to axial force, and high-precision positioning and clamping can be carried out; the device is simple in structure and convenient to install and maintain.

Description

Technical Field

[0001] The utility model belongs to the technical field of rotary tables, and particularly relates to a braking structure for a large rotary table. Background Technique

[0002] As a core working component of various machine tools, the movement accuracy, load-bearing capacity, stability and other factors of the rotary table are related to the machining performance of the machine tool; when the rotary table is working, its braking also has a great impact on the working accuracy of the rotary table; most of the existing large rotary tables use an internal butterfly brake to achieve braking, which has high manufacturing difficulty, and the workbench needs to be disassembled during maintenance, making maintenance difficult and the practicability low. Content of the Utility Model

[0003] The purpose of the utility model is to overcome the deficiencies existing in the prior art and provide a braking structure for a large rotary table.

[0004] The technical solution adopted by the utility model to solve the above technical problems is as follows:

[0005] A braking structure for a large rotary table includes a rotary table, a base and a braking assembly. The rotary table is rotatably arranged on the base, and a braking assembly is arranged inside between the rotary table and the base. A circumferential clamping groove capable of cooperating with the braking assembly is formed on the rotary table. The braking assembly includes a module support. A connecting block protruding downward is arranged on one side of the module support. A plurality of mounting holes are circumferentially distributed in the middle of the module support. An oil supply channel communicating with the mounting holes is formed on the module support. Pistons are respectively arranged at the upper and lower ends of the mounting holes. Brake pads capable of cooperating with the pistons are respectively arranged on the upper and lower surfaces of the module support.

[0006] Further, stepped holes are respectively arranged at the upper and lower ends of the mounting holes. Limit convex platforms capable of cooperating with the stepped holes are arranged on the pistons. A spring is arranged at one end of the limit convex platform, and a circlip is arranged in the stepped hole. One end of the spring is fixed by the circlip.

[0007] Further, a sealing ring is arranged between the piston and the mounting hole.

[0008] Further, a plurality of connecting holes are annularly distributed on the connecting block, a plurality of threaded holes corresponding to the connecting holes are annularly distributed on the base, and fixing bolts are arranged in the connecting holes and the threaded holes.

[0009] Further, a fixing convex platform is arranged on one side of the brake pad. A plurality of mounting holes I are circumferentially and evenly distributed on the fixing convex platform. Connecting bolts are respectively arranged in the mounting holes I, and the connecting bolts are screwed on the module support.

[0010] Further, tubing connectors are respectively arranged at both ends of the oil supply passage.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] The brake assembly of the utility model adopts an external and multi-point modular distribution. The module is miniaturized, avoiding the situation of large size and difficult processing of the brake structure of a large workbench. And it can be disassembled separately, facilitating installation and maintenance; the brake assembly is hydraulically driven, with stable actions. The rotary workbench can be positioned and braked at any angle, and the rotating shaft is not subject to axial force, enabling high-precision positioning and clamping. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic diagram of the overall structure of the utility model;

[0014] Figure 2 is a schematic diagram of the structure of the brake assembly of the utility model;

[0015] Figure 3 is Figure 1 an enlarged view of part A in

[0016] Figure 4 is a schematic diagram of the internal structure of the brake assembly of the present utility model.

[0017] In the figure: 1, rotary workbench; 2, base; 3, brake assembly; 4, circumferential clamping groove; 5, module support; 6, connecting block; 7, mounting hole; 8, oil supply passage; 9, piston; 10, brake pad; 11, spring; 12, sealing ring; 13, connecting hole; 14, threaded hole; 15, fixing bolt; 16, fixing boss; 17, mounting hole 1; 18, connecting bolt; 19, tubing connector; 20, circlip; 21, stepped hole; 22, limiting boss. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0018] In order to enable those skilled in the art to better understand the solution of the present utility model, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model.

[0019] As Figures 1 - 4 shown, a brake structure of a large rotary workbench includes a rotary workbench 1, a base 2 and a brake assembly 3. The rotary workbench 1 is rotatably arranged on the base 2, and a brake assembly 3 is arranged inside between the rotary workbench 1 and the base 2. The base 2 provides installation support for each component;

[0020] A circumferential clamping groove 4 that can cooperate with the brake assembly 3 is formed on the rotary workbench 1. When the brake assembly 3 works, it cooperates with the circumferential clamping groove 4 to stop the rotary workbench from rotating;

[0021] The brake assembly 3 includes a module support 5, and a connecting block 6 protruding downward is provided on one side of the module support 5. The connecting block 6 is used to connect the module support 5 to the base 2;

[0022] A number of mounting holes 7 are circumferentially distributed in the middle of the module support 5. An oil supply channel 8 communicating with the mounting holes 7 is formed on the module support 5, and the oil supply channel 8 can inject hydraulic oil into the interior of the mounting holes 7;

[0023] Pistons 9 are respectively arranged at the upper and lower ends of the mounting holes 7, and brake pads 10 capable of cooperating with the pistons 9 are respectively arranged on the upper and lower surfaces of the module support 5. After hydraulic oil is injected into the interior of the mounting holes 7, the two pistons 9 are stressed and move towards the outer ends of the mounting holes 7, pushing the brake pads 10 open. The brake pads 10 cooperate with the upper and lower top walls of the circumferential clamping groove to brake the rotary worktable 1.

[0024] Further, stepped holes 21 are respectively arranged at the upper and lower ends of the mounting holes 7, and limit bosses 22 capable of cooperating with the stepped holes 21 are arranged on the pistons 9. The cooperation between the limit bosses 22 and the stepped holes 21 plays a positioning role for the pistons 9;

[0025] A spring 11 is arranged at one end of the limit boss 22, and a circlip 20 is arranged in the stepped hole. One end of the spring 11 is fixed by the circlip 20. When the pistons 9 are not affected by hydraulic oil, the spring 11 moves the pistons away from the brake pads 10, and the pistons 9 reset, and the rotary worktable 1 can rotate.

[0026] Further, a sealing ring 12 is arranged between the pistons 9 and the mounting holes 7, and the sealing ring 12 prevents hydraulic oil leakage.

[0027] Further, a number of connecting holes 13 are annularly distributed on the connecting block 6, a number of threaded holes 14 corresponding to the connecting holes 13 are annularly distributed on the base 2, and fixing bolts 15 are arranged in the connecting holes 13 and the threaded holes 14. The connecting block 6 is connected to the base 2 by the fixing bolts 15.

[0028] Further, a fixing boss 16 is arranged on one side of the brake pad 10, a number of mounting holes 17 are circumferentially evenly distributed on the fixing boss 16, and connecting bolts 18 are respectively arranged in the mounting holes 17. The brake pads 10 are connected to the module support 5 by the connecting bolts 18.

[0029] Further, oil pipe joints 19 are respectively arranged at both ends of the oil supply channel 8, and hydraulic oil enters and exits the oil supply channel 8 through the oil pipe joints 10 at both ends of the oil supply channel 8.

[0030] Working principle: When the utility model is in use, first, the rotary table 1 is installed on the base 2. Then, the module support 5 of the brake assembly 3 with the brake pads 10 is inserted into the circumferential clamping groove 4. After that, the connecting block 6 is connected to the base 2 by the fixing bolt 15;

[0031] When the rotary table 1 needs to be braked, hydraulic oil is injected into the oil supply channel 8 through the oil pipe joint 19. The two pistons 9 are stressed and move towards the outer end of the mounting hole 7, pushing the brake pads 10 open. The brake pads 10 cooperate with the upper and lower top walls of the circumferential clamping groove to brake the rotary table 1;

[0032] When the hydraulic oil in the oil supply channel 8 is released, the spring 11 makes the pistons move away from the brake pads 10, the pistons 9 reset, the brake pads 10 reset, and the rotary table 1 can rotate freely.

[0033] It can be understood that the above embodiments are only exemplary embodiments adopted to illustrate the principle of the utility model, and the utility model is not limited thereto. For those of ordinary skill in the art, various modifications and improvements can be made without departing from the spirit and essence of the utility model, and these modifications and improvements are also regarded as the protection scope of the utility model.

Claims

1. A brake structure for a large rotary table, comprising a rotary table (1), a base (2) and a brake assembly (3), wherein the rotary table (1) is rotatably arranged on the base (2), and a brake assembly (3) is arranged between the rotary table (1) and the base (2), wherein: The rotary table (1) is provided with a circumferential clamping groove (4) capable of cooperating with the brake assembly (3); the brake assembly (3) comprises a module support (5), one side of the module support (5) is provided with a downwardly protruding connecting block (6), a middle part of the module support (5) is provided with a plurality of mounting holes (7) distributed on the circumference, and the module support (5) is provided with an oil supply channel (8) connected with the mounting hole (7); the upper and lower ends of the mounting hole (7) are respectively provided with pistons (9), and the upper and lower surfaces of the module support (5) are respectively provided with brake pads (10) capable of cooperating with the piston (9).

2. The brake structure of the large rotary table according to claim 1 is characterized in that: The upper and lower ends of the mounting hole (7) are respectively provided with stepped holes (21), and the piston (9) is provided with a limiting boss (22) capable of matching with the stepped hole (21); a spring (11) is provided at one end of the limiting boss (22), a retaining spring (20) is provided in the stepped hole, and one end of the spring (11) is fixed by the retaining spring (20).

3. The brake structure of the large rotary table according to claim 1 is characterized in that: A sealing ring (12) is provided between the piston (9) and the mounting hole (7).

4. The brake structure of the large rotary table according to claim 1 is characterized in that: The connection block (6) is provided with a plurality of connection holes (13) distributed in an annular manner, the base (2) is provided with a plurality of threaded holes (14) corresponding to the connection holes (13) distributed in an annular manner, and fixing bolts (15) are provided in the connection holes (13) and the threaded holes (14).

5. The brake structure of the large rotary table according to claim 1 is characterized in that: A fixing boss (16) is provided on one side of the brake pad (10), a plurality of mounting holes (17) are evenly distributed on the circumference of the fixing boss (16), and connecting bolts (18) are respectively provided in the mounting holes (17), and the connecting bolts (18) are screwed onto the module support (5).

6. The brake structure of the large rotary table according to claim 1 is characterized in that: Oil pipe joints (19) are respectively provided at both ends of the oil supply channel (8).

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