Compact efficient gearbox

Abstract

The utility model relates to the technical field of transmission mechanisms, in particular to a compact efficient gearbox which comprises an input flange and a second-stage gear ring, a second-stage planetary gear is movably assembled on the inner side of the input flange through a second-stage planetary gear pin, and a multi-stage sun gear is movably assembled in the second-stage gear ring. According to the compact type efficient gear box, the self-lubricating composite bearing is adopted by the planetary gear to replace a needle bearing of a conventional gear box, the radial size of the gear box is effectively reduced, and space is saved; a double-lip composite framework shaft seal is adopted between the input flange and the second-stage gear ring, so that the overall sealing performance of the gear box is greatly improved; the whole gearbox is compact in structure, small in occupied external space and convenient to install.

Description

TECHNICAL FIELD

[0001] The utility model relates to transmission mechanism technical field especially a compact high -efficient gear box. BACKGROUND

[0002] Gear box is important mechanical device, through the meshing effect of inside gear pair, the rotational speed of input shaft is improved or reduced to meet the demand of different equipment. Also can adjust the torque of output shaft through changing the rotational speed. The faster the rotational speed is, the smaller the torque of shaft is, and vice versa. Gear box plays an important role in power generation, transportation, chemical equipment, machinery and other fields. Its design is flexible, can be modified as special equipment according to demand, and adopts modular design, reduces the type of parts, is suitable for mass production.

[0003] The existing gear box structure is huge, which leads to high requirement for installation space, and because the sealing of transmission end is limited, the later maintenance cost is relatively high, and the stability is also limited. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem that the existing gear box structure is huge, which leads to high requirement for installation space, and because the sealing of transmission end is limited, the later maintenance cost is relatively high, and the stability is also limited.

[0005] The utility model adopts the technical scheme in the technical solution that the utility model solves the technical problem: a compact high -efficient gear box, including input flange and two -stage gear ring, the inside of input flange is assembled with two -stage planetary gear with two -stage planetary gear pin activity, the inside of two -stage gear ring is assembled with multistage sun gear, the two -stage gear ring inner wall one -stage gear ring is driven with multistage sun gear through one -stage planetary gear and engages, the connecting surface between input flange and two -stage gear ring is provided with double -lip metal skeleton shaft seal, the inside central position of input flange is provided with center through -hole.

[0006] The rear cover is fixedly installed in the opening of the back of the two-stage gear ring.

[0007] The multistage sun gear includes two -stage sun gear and one -stage sun gear, which are engaged with two -stage planetary gear and one -stage planetary gear respectively.

[0008] Two groups of first deep groove ball bearings are arranged between the inner side surface of the two-stage gear ring and the assembly surface of the outer side of the input flange.

[0009] The second deep groove ball bearing is installed in the center through -hole near the two -stage sun gear end, and the metal skeleton shaft seal is installed in the center through -hole away from the two -stage sun gear end.

[0010] The secondary sun wheel is externally connected with a primary wheel train base, and the primary planetary gear is movably assembled with the primary wheel train base through a primary planetary gear pin.

[0011] The inner wall of the rear cover is provided with an inwardly protruding assembly boss, and a thrust baffle is arranged in the assembly boss.

[0012] The secondary planetary gear pin is provided with a self-lubricating composite bearing at a connection end of the secondary planetary gear, and the primary planetary gear is provided with a self-lubricating composite bearing at a connection end of the primary planetary gear.

[0013] The utility model has the advantages of:

[0014] (1) The planetary gear in the compact high-efficiency gear box adopts a self-lubricating composite bearing to replace the conventional needle bearing of the gear box, effectively reduces the radial size of the gear box, and saves space.

[0015] (2) The double-lip composite skeleton shaft seal is adopted between the input flange and the secondary gear ring, which greatly improves the overall sealing performance of the gear box.

[0016] (3) The structure of the entire gear box is compact, occupies small external space, and is convenient to install. DRAWINGS

[0017] The utility model will be further described below in combination with the drawings and embodiments.

[0018] Figure 1 It is a structural schematic diagram of the utility model.

[0019] Figure 2 It is a schematic diagram of the internal structure of the utility model. DETAILED DESCRIPTION

[0020] The utility model will be further described below in combination with the drawings and embodiments.

[0021] In the description of the utility model, it should be pointed out that, unless otherwise explicitly specified and limited, the terms "connected", "connected" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium. For ordinary skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.

[0022] Figure 1 And Figure 2The illustrated compact high-efficiency gearbox includes an input flange 1 and a secondary ring gear 2, the inside of the input flange 1 is movably assembled with a secondary planetary gear 4 through a secondary planetary gear pin 3, the inside of the secondary ring gear 2 is movably assembled with a multi-stage sun gear 5, a primary ring gear 6 on the inner wall of the secondary ring gear 2 is in meshing transmission with the multi-stage sun gear 5 through a primary planetary gear 7, a double-lip metal skeleton shaft seal 8 is arranged between the connection surface of the input flange 1 and the secondary ring gear 2, and a central through hole 9 is formed at the central position inside the input flange 1.

[0023] In order to cooperate with lateral limiting and sealing, a rear cover 10 is fixedly installed inside the opening at the back of the secondary ring gear 2.

[0024] In order to cooperate with multi-stage transmission, the multi-stage sun gear 5 includes a secondary sun gear 51 in meshing transmission with the secondary planetary gear 4 and a primary sun gear 52 in meshing transmission with the primary planetary gear 7.

[0025] In order to reduce the internal friction, two groups of first deep groove ball bearings 11 are arranged between the inner side surface of the secondary ring gear 2 and the assembly surface of the outer side of the input flange 1.

[0026] In order to cooperate with transmission and enhance sealing, a second deep groove ball bearing 12 is installed inside the central through hole 9 near the end of the secondary sun gear 51, and a metal skeleton shaft seal 13 is installed inside the central through hole 9 away from the end of the secondary sun gear 51.

[0027] In order to improve the assembly and transmission stability, the outer side of the secondary sun gear 51 is transmission-connected with a primary wheel train base 14, and the primary planetary gear 7 is movably assembled with the primary wheel train base 14 through a primary planetary gear pin 15.

[0028] The primary wheel train base 14 is in meshing transmission with the secondary sun gear 51 by being sleeved on the secondary sun gear 51, and the transmission tooth surface of the secondary sun gear 51 is greater than that of the primary wheel train base 14.

[0029] In order to improve the internal stability and limiting capacity, the inner wall of the rear cover 10 has an assembly boss protruding inward, and a thrust baffle 16 is assembled inside the assembly boss.

[0030] The thrust baffle 16 can be used for lateral limiting of the multi-stage sun gear 5.

[0031] In order to reduce the overall size of the gearbox and save space, the secondary planetary gear pin 3 and the connection end of the secondary planetary gear 4, and the primary planetary gear pin 15 and the connection end of the primary planetary gear 7 are all provided with self-lubricating composite bearings 17.

[0032] With the above ideal embodiment of the present application as the inspiration, through the above description, relevant staff can make various changes and modifications without deviating from the technical idea of the present application. The technical scope of the present application is not limited to the content in the specification, and the technical scope must be determined according to the scope of claims.

Claims

1. A compact high efficiency gearbox comprising an input flange (1) and a two stage ring gear (2) characterised in that: The input flange (1) is movably assembled with a secondary planetary gear (4) through a secondary planetary gear pin (3), the secondary ring gear (2) is movably assembled with a multi-stage sun gear (5) inside, a primary ring gear (6) on the inner wall of the secondary ring gear (2) is in meshing transmission with the multi-stage sun gear (5) through a primary planetary gear (7), a double-lip metal skeleton shaft seal (8) is arranged between the connecting surface of the input flange (1) and the secondary ring gear (2), and a central through hole (9) is formed in the central position of the input flange (1).

2. A compact and efficient gearbox as claimed in claim 1, characterized in that: The rear cover (10) is fixedly installed in the opening of the back of the secondary ring gear (2).

3. A compact and efficient gearbox as claimed in claim 1, characterized in that: The multi-stage sun gear (5) comprises a secondary sun gear (51) in meshing transmission with the secondary planetary gear (4) and a primary sun gear (52) in meshing transmission with the primary planetary gear (7).

4. A compact and efficient gearbox as claimed in claim 1, characterized in that: Two groups of first deep groove ball bearings (11) are arranged between the inner side surface of the secondary ring gear (2) and the assembly surface of the outer side of the input flange (1).

5. A compact and efficient gearbox as claimed in claim 3, characterized in that: The second deep groove ball bearing (12) is installed inside the central through hole (9) near the end of the secondary sun gear (51), and the metal skeleton shaft seal (13) is installed inside the central through hole (9) away from the end of the secondary sun gear (51).

6. A compact and efficient gearbox as claimed in claim 3, characterized in that: The secondary sun gear (51) is drivingly connected with a primary wheel train base (14), and the primary planetary gear (7) is movably assembled with the primary wheel train base (14) through a primary planetary gear pin (15).

7. A compact and efficient gearbox as claimed in claim 2, characterized in that: The inner wall of the rear cover (10) has an assembly boss protruding inward, and the assembly boss is assembled with a thrust retainer (16) inside.

8. A compact and efficient gearbox as claimed in claim 2, characterized in that: The secondary planetary gear pin (3) and the secondary planetary gear (4) are provided with self-lubricating composite bearings (17) at the connecting ends, and the primary planetary gear (7) and the primary planetary gear pin (15) are provided with self-lubricating composite bearings (17) at the connecting ends.

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