Primary reverse gear clutch assembly for planetary gearbox

Abstract

The utility model discloses a reverse gear clutch assembly for a planetary gearbox, and belongs to the field of engineering machinery. The double-cavity oil cylinders are arranged between the first-gear friction plate assembly and the reverse-gear friction plate assembly, the pistons are installed in the double-cavity oil cylinders respectively, the ferromagnetic magnets are arranged on the combination faces of the pistons and the oil cylinders, and the problems that an existing first-gear and reverse-gear clutch assembly is complex in structure and high in cost are solved. The double-cavity hydraulic transmission mainly comprises a sun gear, a reverse gear planetary gear train, a first-gear planetary gear train B, a double-cavity oil cylinder, a piston, a ferromagnetic magnet, a reverse gear friction plate assembly and a first-gear friction plate assembly, the reverse gear friction plate assembly and the first-gear friction plate assembly are installed on an outer ring of a reverse gear planetary carrier and an outer ring of a first-gear inner gear ring respectively, and the double-cavity oil cylinder is arranged between the reverse gear planetary carrier and the first-gear inner gear ring. Two pistons only capable of axially moving are respectively mounted in an oil cylinder cavity, and a ferromagnetic magnet is arranged on the joint surface of the pistons and the oil cylinder and used for timely resetting of the pistons after oil in the oil cylinder is unloaded. Compared with the prior art, the reverse gear clutch assembly is simple in structure, and cost is reduced.

Description

TECHNICAL FIELD

[0001] The utility model belongs to engineering machinery transmission technical field, concretely speaking, especially relate to a planetary gearbox one reverse clutch assembly. BACKGROUND

[0002] Planetary gearbox is widely used in domestic five-ton loader due to its high transmission efficiency, compact structure, reliable work and strong adaptability. The one reverse clutch assembly of the planetary gearbox is the most important structure in the working process of the loader, which is responsible for transmitting power from the engine to the whole machine to realize the first gear and reverse gear operation of the vehicle.

[0003] Figure 1 As shown in the prior art, the one reverse clutch assembly of the planetary gearbox is provided with a reverse piston on the left side of the reverse friction plate assembly, and the reverse piston works to force the reverse friction plate assembly to combine to realize the brake reverse planet carrier. The first gear piston is arranged on the right side of the first gear friction plate assembly, and the first gear piston works to force the first gear friction plate assembly to combine to realize the brake first gear inner ring. The return spring and the isolation frame are arranged between the first gear piston and the reverse piston. The return spring forces the piston to be close to the oil cylinder when the oil pressure is unloaded, so that the friction plate assembly is separated, and the isolation frame is used to support the return spring and separate the first gear friction plate assembly and the reverse friction plate assembly. The one reverse clutch assembly of the prior art has a complex structure and high cost. UTILITY MODEL CONTENTS

[0004] To solve the above technical problems, the utility model provides a one reverse clutch assembly for a planetary gearbox, which can reduce the production cost.

[0005] The utility model provides a one reverse clutch assembly for a planetary gearbox, which comprises a sun gear, a reverse planetary gear train, a first gear planetary gear train B, a double-cavity oil cylinder, a piston, a strong magnetic magnet, a reverse friction plate assembly, a first gear friction plate assembly and a first gear inner ring. The reverse friction plate assembly is used to brake the reverse planet carrier, the first gear friction plate assembly is used to brake the first gear inner ring, and the double-cavity oil cylinder is arranged between the reverse friction plate assembly and the first gear friction plate assembly. The double-cavity oil cylinder is fixed in the box body B.

[0006] Preferably, the left and right oil chambers of the double-cavity oil cylinder are respectively provided with pistons, the pistons are not rotatable, the pistons move axially after pressure oil is introduced into the oil chamber of the double-cavity oil cylinder, and the pistons push the first gear friction plate assembly or the reverse friction plate assembly to combine.

[0007] Specifically, engine power is transmitted to the reverse planetary gear train from the sun gear, when the left oil cavity of the double-cavity oil cylinder enters pressure oil, the piston is pushed to move left, the reverse friction plate assembly is pushed to combine, the reverse friction plate assembly brakes the reverse planet carrier, and power is output from the first gear planet carrier B; when the right oil cavity of the double-cavity oil cylinder enters pressure oil, the piston is pushed to move right, the first gear friction plate assembly is pushed to combine, the first gear friction plate assembly brakes the first gear inner ring gear, and power is output from the first gear planet carrier B.

[0008] Preferably, the double-cavity oil cylinder is uniformly arranged with strong magnetic magnets in the groove of the piston combination surface respectively, for piston reset when gear pressure oil unloading.

[0009] Further, the first gear planet train B comprises a planet wheel, a first gear planet shaft, a bearing, and a first gear planet carrier B, and the first gear planet carrier B is a one-piece structure.

[0010] Specifically, the left side of the first gear planet carrier B is an inner tooth structure meshed with the planet wheel, the middle of the first gear planet carrier B is a planet carrier structure for supporting the planet wheel, and the right side of the first gear planet carrier B is a connecting disc structure for outputting power.

[0011] Compared with the prior art, the structure of the reverse clutch assembly is optimized, thereby greatly reducing the production cost. BRIEF DESCRIPTION OF DRAWINGS

[0012] Figure 1 It is a structure schematic view of a reverse assembly in the prior art;

[0013] Figure 2 It is a structure schematic view of a reverse assembly in the prior art;

[0014] Figure 3 It is a structure schematic view of a reverse assembly in the prior art;

[0015] Figure 4 It is a structure schematic view of a reverse assembly in the prior art;

[0016] Markings in the drawings: 1, sun gear; 2, bearing; 3, planet wheel; 4, reverse planet shaft; 5, reverse planet carrier; 6, reverse inner ring gear; 7, reverse piston; 8, reverse friction plate assembly; 9, box body; 10, reset spring; 11, isolation carrier; 12, first gear friction plate assembly; 13, first gear piston; 14, first gear oil cylinder; 15, first gear inner ring gear; 16, first gear planet carrier; 17, first gear planet shaft; 18, connecting disc; 19, bearing; 20, reverse planet train; 21, first gear planet train; 22, piston; 23, box body B; 24, double-cavity oil cylinder; 25, first gear planet carrier B; 26, first gear planet train B; 27, strong magnetic magnet. DETAILED DESCRIPTION

[0017] For the purpose of facilitating the understanding of the present application, the present application will be described more fully below with reference to the accompanying drawings. The present application can be realized in many different forms and is not limited to the embodiments described herein. Rather, these embodiments are provided so that the disclosure of the present application is more complete and thorough.

[0018] The present application provides a one-reverse clutch assembly for a planetary gearbox (as shown in Figure 2 The gearbox body B23 is a component of the planetary gearbox, and the planetary gearbox is a mature product known in the field of engineering machinery. Therefore, the working principle of the planetary gearbox and the specific structure of the gearbox body B23 will not be described in detail here.

[0019] The reverse friction plate assembly 8 is used to brake the reverse planet carrier 5, and the first gear friction plate assembly 12 is used to brake the first gear inner ring gear 15. The double-cavity oil cylinder 24 is arranged between the reverse friction plate assembly 8 and the first gear friction plate assembly 12, and the double-cavity oil cylinder 24 is fixed inside the body B23.

[0020] Preferably, the left and right oil chambers of the double-cavity oil cylinder 24 are respectively provided with a piston 22, the piston 22 is rotatably sleeved in the oil chamber of the double-cavity oil cylinder 24, and the piston 22 moves axially after the pressure oil is introduced into the oil chamber of the double-cavity oil cylinder 24, thereby pushing the first gear friction plate assembly 12 or the reverse friction plate assembly 8 to be combined.

[0021] Specifically, the engine power is transmitted from the sun gear 1 to the reverse planetary gear 20. When the left oil chamber of the double-cavity oil cylinder 24 enters the pressure oil, the piston 22 moves leftward, pushing the reverse friction plate assembly 8 to be combined, and the reverse friction plate assembly 8 brakes the reverse planet carrier 5, and the power is output from the first gear planet carrier B25. When the right oil chamber of the double-cavity oil cylinder 24 enters the pressure oil, the piston 22 moves rightward, pushing the first gear friction plate assembly 12 to be combined, and the first gear friction plate assembly 12 brakes the first gear inner ring gear 15, and the power is output from the first gear planet carrier B25.

[0022] Preferably, the double-cavity oil cylinder 24 and the piston 22 are respectively provided with a strong magnetic magnet 27 (as shown in Figure 3When the pressure oil of the double-cavity oil cylinder 24 is unloaded, the strong magnetic magnet 27 arranged at the joint surface of the double-cavity oil cylinder 24 and the piston 22 is attracted, the piston 22 is reset, and the friction plate assembly is disengaged.

[0023] Further, the one-gear planetary gear train B26 comprises a planetary gear 3, a one-gear planetary shaft 17, a bearing 19, and a one-gear planetary carrier B25, wherein the one-gear planetary carrier B25 is a one-piece structure (as shown in the figure). Figure 4

[0024] Specifically, the left side of the one-gear planetary carrier B25 is an internal tooth structure engaged with the planetary gear 3, the middle of the one-gear planetary carrier B25 is a carrier structure for supporting the planetary gear 3, and the right side of the one-gear planetary carrier B25 is a connecting disc structure for outputting power.

[0025] The above is only the preferred embodiment of the present application, and it should be pointed out that for ordinary skilled in the art, without departing from the technical principles of the present application, a number of improvements and modifications can be made, and these improvements and modifications should be considered as the protection scope of the present application.​

Claims

1. A reverse gear clutch assembly for a planetary gearbox, comprising a sun gear (1), a reverse gear planetary gear train (20), a first gear planetary gear train B (26), a dual-chamber cylinder (24), a piston (22), a strong magnetic magnet (27), a reverse gear friction plate assembly (8), and a first gear friction plate assembly (12), wherein the reverse gear friction plate assembly (8) is used to brake the reverse gear planetary carrier (5), and the first gear friction plate assembly (12) is used to brake the first gear internal gear ring (15), characterized in that, A double-chamber cylinder (24) is provided between the reverse friction plate assembly (8) and the first gear friction plate assembly (12), and the double-chamber cylinder (24) is fixed inside the housing B.

2. The reverse gear clutch assembly for a planetary gearbox according to claim 1, characterized in that: Pistons (22) are installed in the oil chambers on the left and right sides of the dual-chamber cylinder (24).

3. The reverse gear clutch assembly for a planetary gearbox according to claim 2, characterized in that: Strong magnetic magnets (27) are uniformly arranged in the groove of the mating surface of the double-chamber oil cylinder (24) and the piston (22).

4. The reverse gear clutch assembly for a planetary gearbox according to claim 1, characterized in that: The first-gear planetary gear train B (26) includes planetary gears (3), a first-gear planetary shaft (17), a bearing (19), and a first-gear planetary carrier B (25), which is an integral structure.

5. The reverse gear clutch assembly for a planetary gearbox according to claim 4, characterized in that: The left side of the first-gear planetary carrier B (25) is an internal gear structure that meshes with the planetary gear (3), the middle of the first-gear planetary carrier B (25) is a planetary carrier structure for supporting the planetary gear (3), and the right side of the first-gear planetary carrier B (25) is a connecting disc structure for outputting power.

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