Planetary gear type friction braking structure

Abstract

The utility model relates to a planetary gear type friction brake structure, which belongs to the technical field of friction plates and comprises a main shaft, a fixed stop friction disc is arranged on the main shaft, and a pressure plate component movably sleeved with the main shaft is arranged on the side edge of the fixed stop friction disc. And a planetary gear friction braking assembly which is in movable pressing friction braking with the fixed stop friction disc is arranged between the pressure plate assembly and the fixed stop friction disc. The planetary gear friction brake assembly comprises an inner gear ring sleeve, a sun gear which is nested and fixed with the main shaft in a flat key limiting manner is arranged in the inner gear ring sleeve, and a planetary gear fixing disc which is sleeved with the main shaft in a bearing manner is arranged at the rear end of the sun gear; and a plurality of planetary teeth which are annularly distributed and are fixedly connected with the planetary tooth fixing disc in a shaft sleeve inserting and embedding manner are arranged between the sun tooth and the inner gear ring sleeve. The brake has the characteristics of compact structure, combination of static and dynamic friction and brake braking, wear resistance, strong heat dissipation performance, reliable stability and low maintenance cost. The problem of friction braking of a planetary gear structure is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of friction plates, in particular to a planetary gear type friction brake structure. Background Art

[0002] As mechanical devices develop towards high load, high operating speed and high power, they are used in high and low speed with small torque (motorcycles, etc.), high and low speed with medium torque (automatic transmission cars, etc.), and even high and low speed with large torque (machine tools, ships, construction machinery, agricultural machinery, etc.), which puts higher performance requirements on friction devices.

[0003] Traditional powder metallurgy friction materials can no longer fully meet the requirements of high energy density friction systems; the high cost of carbon / carbon friction materials, the brittleness of ceramic-based friction materials, and the low strength of paper-based friction materials restrict their large-scale promotion and application. Therefore, it is urgent and necessary to develop new friction plates that match the transmission system or braking system, have a long service life and high reliability. They can be used in various types of vehicles, such as automotive automatic transmissions, torque converters, differentials, torque managers, synchronizer rings, motorcycle clutches, and engineering machinery gearboxes. Summary of the invention

[0004] The utility model mainly solves the deficiencies in the prior art and provides a planetary gear friction brake structure, which has the characteristics of compact structure, static and dynamic friction combined brake, wear resistance, strong heat dissipation performance, reliable stability and low maintenance cost. It solves the problem of friction brake of planetary gear structure.

[0005] The above technical problems of the utility model are mainly solved by the following technical solutions:

[0006] A planetary gear friction brake structure includes a main shaft, a fixed stop friction disk is provided on the main shaft, a pressure plate assembly movably sleeved with the main shaft is provided on the side of the fixed stop friction disk, and a planetary gear friction brake assembly movably pressed and friction-braked with the fixed stop friction disk is provided between the pressure plate assembly and the fixed stop friction disk. The planetary gear friction brake assembly includes an inner gear ring sleeve, a sun gear is provided in the inner gear ring sleeve and fixedly nested with the main shaft in a parallel key-limited manner, a planetary gear fixed disk is provided at the rear end of the sun gear and sleeved with the main shaft in a bearing manner, and a plurality of planetary gears are provided between the sun gear and the inner gear ring sleeve and are connected and fixedly connected with the planetary gear fixed disk in an annular manner in a sleeve-like manner. The planetary gears are meshed with the sun gear and the inner gear ring sleeve for transmission.

[0007] Preferably, the fixed stop friction disk comprises a fixed disk, a bearing which is fixedly connected to the fixed disk in an embedded manner is provided between the fixed disk and the main shaft, and a retaining ring which is fixedly connected to the main shaft in a slot-like manner is provided at the rear end of the bearing.

[0008] Preferably, friction material rings which are integrated with the fixed disk and the inner gear ring sleeve are provided between the front end of the fixed disk and the planetary gear friction brake assembly, and between the rear end of the inner gear ring sleeve and the fixed stop friction disk.

[0009] Preferably, the pressure plate assembly comprises a clamping piston ring, and a front end of the clamping piston ring is provided with a plurality of disc springs which are screw-fixed to the clamping piston ring.

[0010] Preferably, the rear end of the clamping piston ring is provided with a brake cylinder sleeved with the main shaft, and a plurality of telescopic rods are arranged between the brake cylinder and the clamping piston ring and are distributed in an annular manner with equal spacing. A protective shell for fixing the brake cylinder is arranged on the periphery.

[0011] The utility model can achieve the following effects:

[0012] The utility model provides a planetary gear friction brake structure, which, compared with the prior art, has the characteristics of compact structure, static and dynamic friction combined brake, wear resistance, strong heat dissipation performance, reliable stability and low maintenance cost, and solves the problem of friction brake of planetary gear structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a structural schematic diagram of the utility model.

[0014] Figure 2 It is a structural sectional view of the utility model.

[0015] In the figure: main shaft 1, fixed stop friction plate 2, planetary gear friction brake assembly 3, pressure plate assembly 4, telescopic rod 5, brake cylinder 6, retaining ring 7, bearing 8, fixed plate 9, friction material ring 10, inner gear ring sleeve 11, planetary gear 12, planetary gear fixed plate 13, clamping piston ring 14, disc spring 15, sun gear 16. DETAILED DESCRIPTION

[0016] The technical solution of the utility model is further specifically described below through embodiments and in conjunction with the accompanying drawings.

[0017] Example: Figure 1 and Figure 2As shown, a planetary gear type friction brake structure includes a main shaft 1, on which a fixed stop friction disc 2 is provided, and the fixed stop friction disc 2 includes a fixed disc 9, and a bearing 8 is provided between the fixed disc 9 and the main shaft 1, and a clamping ring 7 is provided at the rear end of the bearing 8, and is connected and fixed to the main shaft 1 by a slot-type nesting. A pressure plate assembly 4 is provided on the side of the fixed stop friction disc 2, and is movably sleeved with the main shaft 1. The pressure plate assembly 4 includes a clamping piston ring 14, and a pair of disc springs 15 are provided at the front end of the clamping piston ring 14 in a mirror-symmetrical manner and are screw-connected and fixed to the clamping piston ring 14. A brake cylinder 6 is provided at the rear end of the clamping piston ring 14, and three telescopic rods 5 are provided between the brake cylinder 6 and the clamping piston ring 14 and are distributed in an annular manner with equal spacing. A planetary gear friction brake assembly 3 is provided between the pressure plate assembly 4 and the fixed friction plate 2 for movably pressing and friction braking with the fixed friction plate 2. The planetary gear friction brake assembly 3 includes an inner gear ring sleeve 11. Friction material rings 10 are provided between the front end of the fixed plate 9 and the planetary gear friction brake assembly 3, and between the rear end of the inner gear ring sleeve 11 and the fixed friction plate 2. The rings are respectively integrated with the fixed plate 9 and the inner gear ring sleeve 11. A sun gear 16 is provided in the inner gear ring sleeve 11, which is fixedly nested with the main shaft 1 in a parallel key limiting manner. A planetary gear fixed plate 13 is provided at the rear end of the sun gear 16, which is sleeved with the main shaft 1 in a bearing manner. Three planetary gears 12 are provided between the sun gear 16 and the inner gear ring sleeve 11, which are distributed in an annular manner and are connected and fixedly connected with the planetary gear fixed plate 13 in a sleeve manner.

[0018] In summary, the planetary gear friction brake structure has the characteristics of compact structure, static and dynamic friction combined brake, wear resistance, strong heat dissipation performance, reliable stability and low maintenance cost, and solves the problem of friction brake of planetary gear structure.

[0019] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the basic features of the present invention. Therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any reference numerals in the claims should not be regarded as limiting the claims involved.

[0020] In summary, the above description is only a specific embodiment of the present invention, but the structural features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the patent scope of the present invention.

Claims

1. A planetary gear friction brake structure, characterized in that: The invention comprises a main shaft (1), wherein a fixed stop friction disc (2) is provided on the main shaft (1), a pressure disc assembly (4) movably sleeved with the main shaft (1) is provided on the side of the fixed stop friction disc (2), and a planetary gear friction brake assembly (3) movably pressed and friction-braked with the fixed stop friction disc (2) is provided between the pressure disc assembly (4) and the fixed stop friction disc (2); the planetary gear friction brake assembly (3) comprises an inner gear ring sleeve (11), wherein a sun gear (16) is provided in the inner gear ring sleeve (11) and is nested and fixed with the main shaft (1) in a parallel key limiting manner, and a planetary gear fixed disc (13) sleeved with the main shaft (1) is provided at the rear end of the sun gear (16), and a plurality of planetary gears (12) are provided between the sun gear (16) and the inner gear ring sleeve (11) and are distributed in an annular manner and are inserted and fixed with the planetary gear fixed disc (13) in a sleeve-like manner.

2. The planetary gear friction brake structure according to claim 1, characterized in that: The fixed stop friction disk (2) comprises a fixed disk (9), a bearing (8) is provided between the fixed disk (9) and the main shaft (1) and is fixedly connected to the fixed disk (9) in an embedded manner, and a retaining ring (7) is provided at the rear end of the bearing (8) and is fixedly connected to the main shaft (1) in an embedded manner.

3. The planetary gear friction brake structure according to claim 2, characterized in that: A friction material ring (10) which is integrated with the fixed disk (9) and the inner gear ring sleeve (11) is provided between the front end of the fixed disk (9) and the planetary gear friction brake assembly (3), and between the rear end of the inner gear ring sleeve (11) and the fixed stop friction disk (2).

4. The planetary gear friction brake structure according to claim 1, characterized in that: The pressure plate assembly (4) comprises a compression piston ring (14), and a front end of the compression piston ring (14) is provided with a plurality of disc springs (15) which are screw-connected and fixed to the compression piston ring (14).

5. The planetary gear type friction brake structure according to claim 4, characterized in that: A brake cylinder (6) sleeved with the main shaft (1) is provided at the rear end of the clamping piston ring (14), and a plurality of telescopic rods (5) distributed in an annular pattern at equal intervals are provided between the brake cylinder (6) and the clamping piston ring (14).

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