High-bearing-capacity duplicate gear structure

Abstract

The utility model discloses a high-load-bearing duplicate gear structure which comprises an intermediate gear shaft, one end of the intermediate gear shaft penetrates through a middle partition plate to be inserted into a machine body, and the outer side face of the intermediate gear shaft is connected with a duplicate large gear and a duplicate small gear in a sleeved mode. Paired tapered roller bearings are arranged between the duplex large gear and the intermediate gear shaft and between the duplex small gear and the intermediate gear shaft, the outer side face of the intermediate gear shaft is sleeved with a baffle ring, the baffle ring is located between the duplex large gear and the duplex small gear, and the duplex large gear, the duplex small gear and the baffle ring are fixedly connected through a bolt I; according to the high-bearing duplicate gear structure, a lubricating oil film is easily formed between the bearing and the gear shaft, high-speed operation of the gear under the splash lubrication condition is met, and the service life of a diesel engine is guaranteed.

Description

Technical Field

[0001] The utility model relates to the technical field of diesel engine manufacturing, in particular to a high-load-bearing double gear structure. Background Art

[0002] In gear transmission, duplex gears, as an important transmission device in diesel engines, are responsible for power transmission and transmission ratio change.

[0003] In some high-power enhanced diesel engines, the diesel engine structure design is relatively compact, and the commonly used lubrication method is splash lubrication. In the splash lubrication structure, when the gear speed is high, the lubricating oil film is difficult to form between the sliding bearing and the gear shaft, which can easily cause the sliding bearing to burn, and ultimately affect the service life of the diesel engine. Summary of the invention

[0004] The technical problem to be solved by the utility model is to overcome the existing defects and provide a high-load double gear structure, so that a lubricating oil film can be easily formed between the bearing and the gear shaft to meet the high-speed operation of the gear under splash lubrication conditions, and can effectively solve the problems in the background technology.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a high-load-bearing double gear structure, comprising an intermediate gear shaft, one end of the intermediate gear shaft is inserted into the machine body through a middle partition plate, the outer side surfaces of the intermediate gear shaft are respectively sleeved with a double large gear and a double small gear, a pair of tapered roller bearings are arranged between the double large gear and the double small gear and the intermediate gear shaft, the outer side surface of the intermediate gear shaft is sleeved with a retaining ring, the retaining ring is located between the double large gear and the double small gear, and the double large gear, the double small gear and the retaining ring are fixedly connected by bolts I.

[0006] As a preferred technical solution of the utility model, six stepped holes are evenly distributed in the intermediate gear shaft, and bolts II are arranged in the stepped holes for connecting the intermediate gear shaft, the middle partition plate and the machine body.

[0007] As a preferred technical solution of the utility model, positioning pin holes are provided on both sides of the double-linked large gear, the double-linked small gear and the retaining ring, and positioning pins pass through the positioning pin holes.

[0008] As a preferred technical solution of the utility model, the number of the bolts I is six, and the six bolts I are evenly distributed between the double-linked large gear, the double-linked small gear and the retaining ring.

[0009] As a preferred technical solution of the utility model, the outer ring of the tapered roller bearing is interference fit with the inner holes of the duplex large gear and the duplex small gear respectively, and the inner ring of the tapered roller bearing is interference fit with the outer side surface of the intermediate gear shaft.

[0010] As a preferred technical solution of the utility model, the outer end of the intermediate gear shaft is provided with an external thread and a groove, a locking washer is provided in the groove, a locking nut is provided on one side of the locking washer, and the locking nut is threadedly connected to the external thread of the intermediate gear shaft.

[0011] As a preferred technical solution of the utility model, a washer I is arranged between the head of the bolt I and the end face of the duplex large gear, and a washer II is arranged between the bolt II and the end face of the stepped hole.

[0012] Compared with the prior art, the beneficial effects of the utility model are as follows: the high-load double gear structure is reasonably designed and easy to operate. The axial positioning of the gears is achieved by selecting paired tapered roller bearings, so that the axial clearance of the intermediate gears is small. The tapered roller bearings have low lubrication requirements and are easy to form a lubricating oil film, which protects the tapered roller bearings and avoids their burning and damage, thereby meeting the high-speed operation of the gears under splash lubrication conditions. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0014] In the figure: 1 body, 2 middle partition, 3 double large gear, 4 double small gear, 5 washer I, 6 bolt I, 7 tapered roller bearing, 8 bolt II, 9 washer II, 10 intermediate gear shaft, 11 locking nut, 12 locking washer, 13 retaining ring, 14 positioning pin. DETAILED DESCRIPTION

[0015] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0016] See also Figure 1The utility model provides a technical solution: a high-load double gear structure, including an intermediate gear shaft 10, one end of the intermediate gear shaft 10 is inserted into the machine body 1 through the middle partition plate 2, the outer side of the intermediate gear shaft 10 is respectively sleeved with a double large gear 3 and a double small gear 4, a pair of tapered roller bearings 7 are arranged between the double large gear 3 and the double small gear 4 and the intermediate gear shaft 10, the outer side of the intermediate gear shaft 10 is sleeved with a retaining ring 13, the retaining ring 13 is located between the double large gear 3 and the double small gear 4, the double large gear 3, the double small gear 4 and the retaining ring 13 are fixedly connected by bolts I6, the outer rings of the tapered roller bearings 7 are respectively interference fit with the inner holes of the double large gear 3 and the double small gear 4, and the outer ring end faces of the tapered roller bearings 7 are respectively fitted with the two end faces of the retaining ring 13, and the inner ring of the tapered roller bearing 7 is interference fit with the outer side of the intermediate gear shaft 10.

[0017] The intermediate gear shaft 10 is composed of two sections of cylinders. The inner cylinder passes through the middle partition plate 2 and is inserted into the body 1, and is clearance-matched with its inner hole. The outer section of the cylinder is interference-fitted with the inner ring of the tapered roller bearing 7. An external thread and a groove are provided at the outer end of the cylinder, and a locking washer 12 is provided in the groove. A locking nut 11 is provided on one side of the locking washer 12. The locking nut 11 is threadedly connected to the external thread of the intermediate gear shaft 10 to achieve a firm fixation of the intermediate gear shaft 10.

[0018] Furthermore, in order to improve the installation stability of the intermediate gear shaft 10, six stepped holes are evenly distributed in the intermediate gear shaft 10, and bolts II8 are arranged in the stepped holes for connecting the intermediate gear shaft 10, the middle partition plate 2 and the body 1.

[0019] Furthermore, in order to facilitate the quick connection of the double large gear 3, the double small gear 4 and the retaining ring 13, positioning pin holes are provided on both sides of the double large gear 3, the double small gear 4 and the retaining ring 13, and positioning pins 14 pass through the positioning pin holes. After positioning by the two positioning pins 14, the bolts I6 are tightened to fix the connection.

[0020] Furthermore, in order to ensure the connection stability between the double-linked large gear 3 and the double-linked small gear 4, the number of bolts I6 is increased to six, and the six bolts I6 are evenly distributed between the double-linked large gear 3, the double-linked small gear 4 and the retaining ring 13.

[0021] Furthermore, in order to prevent the bolts I6 and II8 from loosening, a washer I5 is provided between the head of the bolt I6 and the end face of the duplex gear 3, and a washer II9 is ​​provided between the bolt II8 and the end face of the stepped hole.

[0022] During use: install the tapered roller bearings 7 from both ends of the intermediate gear shaft 10 respectively, with the retaining ring 13 located between the two tapered roller bearings 7, press the duplex large gear 3 and the duplex small gear 4 onto the outer ring of the tapered roller bearing 7, and then position and connect the duplex large gear 3, the duplex small gear 4 and the retaining ring 13 through the locating pin 14, and then tighten the bolt I6, pass one end of the intermediate gear shaft 10 through the middle partition 2 and press it into the inner hole of the body 1, screw it into the body 1 through the bolt II8, and then put the locking washer 12 at the other end of the intermediate gear shaft 10, tighten the locking nut 11 to press the inner ring of the tapered roller bearing 7, install the inner teeth of the locking washer 12 in the groove of the intermediate gear shaft 10, tighten the locking nut 11 until you begin to feel obvious axial resistance, and after tightening the locking nut 11, embed the outer teeth of the locking washer 12 into the groove of the locking nut 11, and punch grooves every 30° on the threaded connection to fix the locking nut 11.

[0023] The utility model can adjust the spacing between the double large gear 3 and the double small gear 4 by changing the thickness of the retaining ring 13. In actual design, it can be appropriately adjusted according to the installation position; at the same time, the retaining ring 13 serves as a positioning reference when the tapered roller bearing 7 is installed, and the structure is simple and easy to install; since there is axial thrust during helical gear transmission, appropriate axial positioning measures need to be adopted, so paired tapered roller bearings 7 are selected to achieve the axial positioning of the gears, the axial clearance of the intermediate gears is small, and the transmission is stable. At the same time, the tapered roller bearings have low lubrication requirements and are easy to form a lubricating oil film, which can meet the high-speed operation of the gears under splash lubrication conditions.

[0024] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A high-load double gear structure, characterized in that: The invention comprises an intermediate gear shaft (10), one end of which passes through a middle partition plate (2) and is inserted into a machine body (1); a double-linked large gear (3) and a double-linked small gear (4) are respectively sleeved on the outer side surface of the intermediate gear shaft (10); a pair of tapered roller bearings (7) are arranged between the double-linked large gear (3) and the double-linked small gear (4) and the intermediate gear shaft (10); a retaining ring (13) is sleeved on the outer side surface of the intermediate gear shaft (10); the retaining ring (13) is located between the double-linked large gear (3) and the double-linked small gear (4); and the double-linked large gear (3), the double-linked small gear (4) and the retaining ring (13) are fixedly connected by bolts 1 (6).

2. A high load-bearing double gear structure according to claim 1, characterized in that: Six stepped holes are evenly distributed in the intermediate gear shaft (10), and bolts II (8) are arranged in the stepped holes for connecting the intermediate gear shaft (10), the middle partition plate (2) and the machine body (1).

3. A high load-bearing double gear structure according to claim 1, characterized in that: Positioning pin holes are provided on both sides of the double-linked large gear (3), the double-linked small gear (4) and the retaining ring (13), and positioning pin holes are passed through the positioning pin holes.

4. A high load-bearing double gear structure according to claim 1, characterized in that: The number of the bolts 1 (6) is six, and the six bolts 1 (6) are evenly distributed between the double-linked large gear (3), the double-linked small gear (4) and the retaining ring (13).

5. The high-load-bearing double gear structure according to claim 1, characterized in that: The outer ring of the tapered roller bearing (7) is respectively interference fit with the inner holes of the duplex large gear (3) and the duplex small gear (4), and the inner ring of the tapered roller bearing (7) is interference fit with the outer side surface of the intermediate gear shaft (10).

6. A high load-bearing double gear structure according to claim 1, characterized in that: An outer end of the intermediate gear shaft (10) is provided with an external thread and a groove, a locking washer (12) is provided in the groove, a locking nut (11) is provided on one side of the locking washer (12), and the locking nut (11) is threadedly connected to the external thread of the intermediate gear shaft (10).

7. A high load-bearing double gear structure according to claim 2, characterized in that: A washer I (5) is arranged between the head of the bolt I (6) and the end face of the double-linked large gear (3), and a washer II (9) is arranged between the bolt II (8) and the end face of the stepped hole.

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