Sealing structure of gearbox of rotary cultivator

Abstract

A shaft is transversely arranged, a bearing chamber is arranged outside the shaft in a sleeved mode, a containing groove is formed in the middle of the right side face of the shaft, a through hole is formed in the center of the bottom face of the containing groove, a bearing is arranged in the containing groove, and the containing groove is rotationally connected with the shaft in a sleeved mode through the bearing. A plurality of fixing bolts are transversely arranged outside the left side face of the bearing chamber, limiting connection between the bearing chamber and the gearbox body is achieved through the fixing bolts, a clamping groove is formed in the middle of the left side face and communicates with the containing groove through a through hole, and a plurality of threaded connecting grooves are transversely formed outside the bottom face of the clamping groove. The oil seal chamber is round and is located in the clamping groove, a limiting bolt is rotationally arranged outside the oil seal chamber in a transverse thread penetrating mode, a mounting hole matched with a shaft structure is formed in the center of the oil seal chamber, a groove is formed in the middle of the right side face of the oil seal chamber, and an annular oil seal is arranged in the groove; the oil seal has the advantages of being reasonable in structural design, time-saving and convenient to replace.

Description

Technical Field

[0001] The utility model belongs to the technical field of rotary tiller gearboxes, and in particular relates to a sealing structure of a rotary tiller gearbox. Background Art

[0002] The gearbox, also known as the transmission, is an automotive accessory used to change the engine speed and torque, and can fix or change the transmission ratio of the output shaft and the input shaft in a fixed or stepped manner. In order to reduce the friction generated by its internal components when rotating at high speed and improve its overall service life, it is necessary to inject transmission lubricant into the gearbox and install sealing structures such as oil seals to avoid oil seepage or leakage during use; however, during the long-term use of the gearbox, especially when oil seepage or even oil leakage occurs due to wear or corrosion of the oil seal, the oil seal needs to be replaced. When replacing the oil seal, since the oil seal of the existing gearbox is mostly installed inside the bearing chamber, the bearing chamber needs to be disassembled as a whole before replacing the oil seal, and the subsequent oil seal replacement operation can only be performed after the bearing chamber is disassembled. The operation process is cumbersome and time-consuming; therefore, in order to solve the above problems, it is necessary to develop a tiller gearbox sealing structure with a reasonable structural design and a time-saving and convenient oil seal replacement operation. Utility Model Content

[0003] The purpose of the utility model is to overcome the deficiencies of the prior art and to provide a tiller gearbox sealing structure which has a reasonable structural design and is time-saving and convenient in oil seal replacement operation.

[0004] The purpose of the present utility model is achieved as follows: a sealing structure of a rotary tiller gearbox, comprising a shaft, a bearing chamber and an oil seal chamber, wherein the shaft is arranged horizontally as a whole, the bearing chamber is sleeved on the outside of the shaft, a placement groove is provided in the middle position of the right side thereof, a through hole is provided at the center of the bottom surface of the placement groove, a bearing is provided inside, and the bearing is rotatably sleeved with the shaft arranged horizontally through the through hole through the bearing, a plurality of fixing bolts are provided horizontally on the outside of the left side of the bearing chamber, and the limiting connection between the bearing and the gearbox case is achieved by the fixing bolts, and a fixing bolt is provided in the middle position of the left side thereof. A card slot is provided, which is concentrically arranged with the placement slot and connected to each other through a through hole, and a plurality of threaded connection grooves are horizontally arranged on the outside of the bottom surface of the card slot; the oil seal chamber is circular as a whole, located in the card slot at the center of the left side of the bearing chamber, and the outside of the oil seal chamber is horizontally threaded with a plurality of limit bolts that cooperate with the threaded connection groove structure, and a mounting hole that cooperates with the shaft structure is horizontally arranged at the center, and a groove is provided in the middle position of the right side of the oil seal chamber, the groove is concentrically arranged with the mounting hole, and an annular oil seal is provided inside the groove.

[0005] Furthermore, the clamping slot and the placement slot are both circular slot structures, and the diameter of the clamping slot is larger than the diameter of the placement slot.

[0006] Furthermore, a connecting ring is concentrically provided on the outside of the right opening of the groove, the connecting ring is integrally connected to the oil seal chamber, and the outer diameter of the connecting ring matches the diameter of the through hole.

[0007] Furthermore, the oil seal, the groove, the bearing and the placement groove are all concentrically arranged.

[0008] The beneficial effects of the utility model are as follows: the utility model provides a fixing bolt, and utilizes the locking and fixing effect of the fixing bolt to achieve a fixed connection between the bearing chamber as a whole and the gearbox case body; by providing a placement groove and a bearing, the placement groove can be utilized to install the bearing, and the bearing can be utilized to achieve a rotatable sleeve connection between the bearing chamber as a whole and the shaft; by providing a card slot, a threaded connection groove, a limit bolt, a groove and an oil seal, the oil seal chamber can be placed by utilizing the card slot, and the threaded sleeve connection between the limit bolt and the threaded connection groove can be utilized to achieve a limited installation of the oil seal chamber on the side of the bearing chamber, and then, through the limited connection between the oil seal chamber and the bearing chamber, the oil seal in the groove can be sealed and installed on the outside of the shaft; the utility model adopts this structure, and when the oil seal needs to be replaced, only the limit bolt needs to be disassembled, and the oil seal chamber and the oil seal can be removed, without the need to disassemble the bearing chamber as a whole. Compared with the existing structure, the convenience of the oil seal replacement operation is increased; in general, the utility model has the advantages of reasonable structural design and time-saving and convenient oil seal replacement operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0009] Figure 1 It is a sectional view of the front view of the present utility model.

[0010] Figure 2 It is a sectional view of the front view of the connection between the bearing chamber and the bearing in the present invention.

[0011] Figure 3 It is a sectional view of the front view of the connection between the oil seal chamber and the oil seal in the utility model.

[0012] In the figure: 1, shaft 2, bearing chamber 21, placement groove 22, through hole 23, fixing bolt 24, clamping groove 25, threaded connection groove 3, oil seal chamber 31, limit bolt 32, mounting hole 33, groove 34, connecting ring 4, bearing 5, oil seal. DETAILED DESCRIPTION

[0013] The present invention will be further described below with reference to the accompanying drawings.

[0014] Example: Figure 1 、 Figure 2 、 Figure 3As shown, a sealing structure of a rotary tiller gearbox includes a shaft 1, a bearing chamber 2 and an oil seal chamber 3. The shaft 1 is arranged horizontally as a whole, and the bearing chamber 2 is sleeved on the outside of the shaft 1. A placement groove 21 is provided in the middle position of the right side thereof, and a through hole 22 is provided at the center of the bottom surface of the placement groove 21. A bearing 4 is provided inside and is rotatably sleeved with the shaft 1 which is transversely arranged inside the through hole 22 through the bearing 4. A plurality of fixing bolts 23 are provided horizontally on the outside of the left side of the bearing chamber 2, and the fixing bolts 23 are used to realize the limiting connection between the bearing chamber 2 and the gearbox housing. A card slot 24 is provided in the middle position of the left side. The card slot 2 4 is arranged concentrically with the placement groove 21 and is connected to each other through the through hole 22, and a plurality of threaded connection grooves 25 are transversely arranged on the outside of the bottom surface of the clamping groove 24; the oil seal chamber 3 is circular as a whole and is located in the clamping groove 24 at the center of the left side of the bearing chamber 2, and a plurality of limit bolts 31 that cooperate with the threaded connection groove 25 structure are rotatably passed through the outside of the oil seal chamber 3 by transverse threads, and a mounting hole 32 that cooperates with the structure of the shaft 1 is transversely arranged at the center, and a groove 33 is provided in the middle position of the right side of the oil seal chamber 3, the groove 33 is arranged concentrically with the mounting hole 32, and an annular oil seal 5 is provided inside the groove 33.

[0015] The clamping groove 24 and the placement groove 21 are both circular groove structures, and the diameter of the clamping groove 24 is larger than the diameter of the placement groove 21; a connecting ring 34 is concentrically provided on the outside of the right opening of the groove 33, and the connecting ring 34 is integrally connected to the oil seal chamber 3, and the outer diameter of the connecting ring 34 matches the diameter of the through hole 22. The connecting ring 22 can increase the convenience of positioning operation when the oil seal chamber 3 is installed; the oil seal 5, the groove 33, the bearing 4 and the placement groove 21 are all concentrically arranged.

[0016] When the present invention is in use, the bearing chamber 2 is first pressed onto the outside of the shaft 1 by means of a sleeve connection, thereby realizing the rotational sleeve connection between the bearing chamber 2 and the shaft 1 through the bearing 4, and then, the locking and fixing effect of the fixing bolt 23 is utilized to realize the fixed connection between the bearing chamber 2 as a whole and the gearbox housing, thereby completing the fixed installation of the bearing chamber 2; then, the oil seal 5 is placed inside the groove 33, and finally, by utilizing the cooperation between the card groove 24 and the oil seal chamber 3, the oil seal chamber 3 is sleeved onto the outside of the shaft 1, while completing the positioning and placement of the oil seal chamber 2 as a whole in the card groove 24, and then, by utilizing the limit bolt 31 and The threaded connection between the threaded connection grooves 24 can realize the limited installation of the oil seal chamber 3 on the side of the bearing chamber 2, and then through the limited connection between the oil seal chamber 3 and the bearing chamber 2, the oil seal 5 in the groove 33 is sealed and installed on the outside of the shaft 1; the utility model adopts this structure, and when the oil seal 5 needs to be replaced, it is only necessary to disassemble the limiting bolt 31 to remove the oil seal chamber 3 and the oil seal 5, and there is no need to disassemble the bearing chamber 2 as a whole. Compared with the existing structure, the convenience of the oil seal 5 replacement operation is increased; in general, the utility model has the advantages of reasonable structural design and time-saving and convenient oil seal replacement operation.

[0017] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, ordinary technicians in the field should understand that the specific implementation methods of the present invention can still be modified or replaced by equivalents. Any modification or equivalent replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

Claims

1. A sealing structure for a rotary tiller gearbox, comprising a shaft (1), a bearing chamber (2) and an oil seal chamber (3), characterized in that: The shaft (1) is arranged horizontally as a whole, and the bearing chamber (2) is sleeved on the outside of the shaft (1). A placement groove (21) is provided in the middle position of the right side thereof, and a through hole (22) is provided at the center of the bottom surface of the placement groove (21). A bearing (4) is provided inside, and the shaft (1) which is arranged horizontally through the through hole (22) is rotatably sleeved through the bearing (4). A plurality of fixing bolts (23) are provided horizontally on the outside of the left side of the bearing chamber (2), and the fixing bolts (23) are used to realize the limited connection between the bearing chamber (2) and the gearbox housing. A clamping groove (24) is provided in the middle position of the left side, and the clamping groove (24) is concentrically arranged with the placement groove (21) and is connected through The through holes (22) are interconnected, and a plurality of threaded connection grooves (25) are transversely arranged on the outside of the bottom surface of the groove (24); the oil seal chamber (3) is circular as a whole, located in the groove (24) at the center of the left side of the bearing chamber (2), and a plurality of limit bolts (31) that match the threaded connection groove (25) structure are rotated through the outside of the oil seal chamber (3) in a transverse thread, and a mounting hole (32) that matches the shaft (1) structure is transversely arranged at the center, and a groove (33) is arranged in the middle position of the right side of the oil seal chamber (3), the groove (33) is concentrically arranged with the mounting hole (32), and an annular oil seal (5) is arranged inside the groove (33).

2. The sealing structure of a rotary tiller gearbox according to claim 1, characterized in that: The clamping groove (24) and the placement groove (21) are both circular groove structures, and the diameter of the clamping groove (24) is larger than the diameter of the placement groove (21).

3. The sealing structure of a rotary tiller gearbox according to claim 1, characterized in that: A connecting ring (34) is concentrically provided on the outside of the right opening of the groove (33). The connecting ring (34) is integrally connected to the oil seal chamber (3), and the outer diameter of the connecting ring (34) matches the diameter of the through hole (22).

4. The sealing structure of a rotary tiller gearbox according to claim 1, characterized in that: The oil seal (5), the groove (33), the bearing (4) and the placement groove (21) are all concentrically arranged.

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