Pneumatic brake module for small rotary table of machining center

Abstract

The utility model relates to a machining center small rotary table pneumatic brake module which comprises a rotor shaft, a connecting table and a brake assembly, the rotor shaft is connected with the connecting table through the brake assembly, the brake assembly comprises a brake disc, a brake shell, an annular piston and a sealing ring plate, the brake disc is installed at the lower end of the rotor shaft, and the sealing ring plate is installed at the lower end of the brake shell. The brake shell is provided with a check ring capable of being matched with the brake disc, and the check ring and the brake shell are connected through a sheet elastic support. A sealing ring plate is arranged at the lower end of the brake shell, and an annular piston capable of being matched with the brake disc is arranged between the sealing ring plate and the brake shell. The brake device is compact in structure and convenient to install, the check ring is clamped in a double-face mode through the annular piston and the brake disc, the stable brake effect is achieved, and the brake effect is better; and in the braking process, the brake disc does not generate displacement and deformation, so that the rotor shaft does not generate displacement change, and a high-precision rotary table clamping function can be realized.

Description

Technical Field

[0001] The utility model belongs to the technical field of rotary worktables, in particular to a pneumatic brake module for a small rotary worktable in a machining center. Background Art

[0002] The rotary table is one of the core components of the machining center. Its motion accuracy is related to the machining precision of the machine tool. The braking effect of the rotary table has a great influence on its motion accuracy. The existing small rotary tables are mainly butterfly brakes installed on the rotating shaft. The disc is pressed by the cylinder, which causes the disc to deform axially and then produce axial locking. The locking process can easily cause the rotating shaft to rotate, resulting in insufficient clamping accuracy. Utility Model Content

[0003] In view of the deficiencies in the prior art, the utility model provides a pneumatic brake module for a small rotary table of a machining center which can realize a high-precision rotary table clamping function.

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

[0005] A pneumatic brake module for a small rotary table in a machining center comprises a rotor shaft, a connecting platform and a brake assembly, wherein the rotor shaft is connected to a connecting platform by means of the brake assembly, the brake assembly comprises a brake disc, a brake housing, an annular piston and a sealing ring plate, the brake disc is mounted on the lower end of the rotor shaft, a retaining ring capable of cooperating with the brake disc is provided on the brake housing, the retaining ring and the brake housing are connected by means of a thin sheet elastic support; a sealing ring plate is provided at the lower end of the brake housing, an annular piston capable of cooperating with the brake disc is provided between the sealing ring plate and the brake housing, an air inlet hole is provided on the sealing ring plate; a plurality of mounting holes are distributed in an annular manner on the brake housing, return springs are respectively provided in the mounting holes.

[0006] Furthermore, sealing rings are respectively arranged between the annular piston and the brake housing and the sealing ring plate.

[0007] Furthermore, an air pipe joint is threadedly connected to the air inlet.

[0008] Furthermore, a connecting ring is provided on the brake housing, a plurality of fixing holes are distributed circumferentially on the connecting ring, and connecting holes matching the fixing holes are distributed circumferentially on the connecting platform.

[0009] Furthermore, a connecting flange is provided on the brake disc, and the brake disc is connected to the rotor shaft via the connecting flange.

[0010] Compared with the prior art, the utility model has the following advantages:

[0011] The utility model has a compact structure and is easy to install. The retaining ring is double-sidedly clamped by the annular piston and the brake disc to achieve a stable braking effect with better braking effect. In the braking process, the brake disc will not be displaced or deformed, so that the rotor shaft will not be displaced, and a high-precision turntable clamping function can be achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] Figure 1 It is a schematic diagram of the internal structure of the utility model;

[0013] Figure 2 It is a schematic diagram of the external outline of the utility model;

[0014] Figure 3 This is a schematic diagram of the brake housing structure of the utility model.

[0015] In the figure: 1. rotor shaft; 2. connecting platform; 3. brake disc; 4. brake housing; 5. annular piston; 6. sealing ring plate; 7. stop ring; 8. air inlet; 9. mounting hole; 10. return spring; 11. sealing ring; 12. air pipe joint; 13. connecting ring; 14. fixing hole; 15. connecting hole; 16. connecting flange; 17. thin sheet elastic support. DETAILED DESCRIPTION

[0016] In order to enable those skilled in the art to better understand the solution of the utility model, the technical solution in the embodiment of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiment of the utility model.

[0017] like Figure 1-Figure 3 As shown, a pneumatic brake module for a small rotary table in a machining center includes a rotor shaft 1, a connecting platform 2 and a brake assembly. The rotor shaft 1 is connected to the connecting platform 2 by using the brake assembly, and the connecting platform 2 is used to connect to the machine tool body;

[0018] The brake assembly includes a brake disc 3, a brake housing 4, an annular piston 5 and a sealing ring plate 6. The brake disc 3 is installed at the lower end of the rotor shaft 1. The brake housing 4 is provided with a stop ring 7 that can cooperate with the brake disc 3. The stop ring 7 and the brake housing 4 are connected by a thin elastic support 17. The thin elastic support 17 enables the stop ring 7 to tilt and deform downward to cooperate with the brake disc 3 to increase the braking friction.

[0019] A sealing ring plate 6 is provided at the lower end of the brake housing 4, and an annular piston 5 capable of cooperating with the brake disc 3 is provided between the sealing ring plate 6 and the brake housing 4. An air inlet hole 8 is opened on the sealing ring plate 6, and gas is injected into the space between the annular piston 5 and the sealing ring plate 6 through the air inlet hole 8. The annular piston 5 moves upward until it presses against the brake disc 3, and the upper wall of the annular piston 5 is in close contact with the brake disc 3, and the friction force increases; then the gas is continuously injected between the annular piston 5 and the sealing ring plate 6, at this time, the position of the annular piston 5 remains unchanged, and the sealing ring plate 6 is away from the annular piston 5. Due to the existence of the thin sheet elastic support 17, the sealing ring plate 6 drives the stop ring 7 to tilt downward, and the lower side wall of the stop ring 7 cooperates with the brake disc 3 to increase the braking friction force and achieve braking;

[0020] A plurality of mounting holes 9 are distributed in an annular manner on the brake housing 4, and return springs 10 are respectively arranged in the mounting holes 9. When the gas is unloaded, the return spring 10 returns the annular piston 5 to the origin. At the same time, the stop ring 7 is reset, the brake disc 3 can rotate, and the brake is released.

[0021] Furthermore, sealing rings 11 are respectively provided between the annular piston 5 and the brake housing 4 and the sealing ring plate 6 to prevent air leakage.

[0022] Furthermore, a trachea connector 12 is threadedly connected to the air inlet 8 and is connected to an external air source.

[0023] Furthermore, a connecting ring 13 is provided on the brake housing 4, and a plurality of fixing holes 14 are distributed circumferentially on the connecting ring 13. Connecting holes 15 matching the fixing holes 14 are distributed circumferentially on the connecting platform 2. The connecting holes 15 are threaded holes, and connecting bolts are inserted into the fixing holes 14. The connecting bolts are screwed into the connecting holes 15 to connect the brake housing 4, the connecting ring 13 and the connecting platform 2.

[0024] Furthermore, a connecting flange 16 is provided on the brake disc 3 , and the brake disc 3 is connected to the rotor shaft 1 via the connecting flange 16 .

[0025] Working principle: When the utility model is in use, gas is injected into the space between the annular piston 5 and the sealing ring plate 6 through the air inlet hole 8, and the annular piston 5 moves upward until it presses against the brake disc 3, and then the gas is continuously injected into the space between the annular piston 5 and the sealing ring plate 6. At this time, the position of the annular piston 5 remains unchanged, and the sealing ring plate 6 is away from the annular piston 5. Due to the existence of the thin sheet elastic support 17, the sealing ring plate 6 drives the stop ring 7 to tilt downward, and the lower side wall of the stop ring 7 cooperates with the brake disc 3 to increase the braking friction and achieve braking; the double cooperation between the annular piston 5, the stop ring 7 and the brake disc 9 is used to achieve a stable braking effect, and the brake disc 3 does not deform, so that the rotor shaft 1 does not change in displacement, and a high-precision turntable clamping function can be achieved;

[0026] When the gas is unloaded, the return spring 10 returns the annular piston 5 to the original point. At the same time, the stop ring 7 is reset, the brake disc 3 can rotate, and the brake is released.

[0027] It is to be understood that the above embodiments are merely exemplary embodiments used to illustrate the principles of the present invention, and the present invention is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of the present invention, and these modifications and improvements are also considered to be within the scope of protection of the present invention.

Claims

1. A pneumatic brake module for a small rotary table of a machining center, comprising a rotor shaft (1), a connecting platform (2) and a brake assembly, characterized in that: A connecting platform (2) is connected to a rotor shaft (1) by means of a brake assembly. The brake assembly comprises a brake disc (3), a brake housing (4), an annular piston (5) and a sealing ring plate (6). The brake disc (3) is mounted on the lower end of the rotor shaft (1). A stop ring (7) capable of cooperating with the brake disc (3) is provided on the brake housing (4). The stop ring (7) and the brake housing (4) are connected by means of a thin sheet elastic support (17). A sealing ring plate (6) is provided at the lower end of the brake housing (4). An annular piston (5) capable of cooperating with the brake disc (3) is provided between the sealing ring plate (6) and the brake housing (4). An air inlet hole (8) is provided on the sealing ring plate (6). A plurality of mounting holes (9) are distributed in an annular pattern on the brake housing (4). Return springs (10) are respectively provided in the mounting holes (9).

2. The pneumatic brake module for a small rotary table of a machining center according to claim 1 is characterized in that: Sealing rings (11) are respectively arranged between the annular piston (5), the brake housing (4) and the sealing ring plate (6).

3. The pneumatic brake module for a small rotary table of a machining center according to claim 1 is characterized in that: An air pipe joint (12) is threadedly connected to the air inlet hole (8).

4. The pneumatic brake module for a small rotary table of a machining center according to claim 1 is characterized in that: The brake housing (4) is provided with a connecting ring (13), a plurality of fixing holes (14) are distributed circumferentially on the connecting ring (13), and the connecting platform (2) is provided with connecting holes (15) matching the fixing holes (14) are distributed circumferentially on the connecting platform (2).

5. The pneumatic brake module for a small rotary table of a machining center according to claim 1 is characterized in that: A connecting flange (16) is provided on the brake disc (3), and the brake disc (3) is connected to the rotor shaft (1) by means of the connecting flange (16).

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