CN217926097U

CN217926097U - Engine

Info

Publication number: CN217926097U
Application number: CN202221878000.8U
Authority: CN
Inventors: 何林; 吴伟泽; 崔宝峰
Original assignee: Jiangsu Changfa Agricultural Equipment Co Ltd
Current assignee: Jiangsu Changfa Agricultural Equipment Co Ltd
Priority date: 2022-07-20
Filing date: 2022-07-20
Publication date: 2022-11-29
Anticipated expiration: 2032-07-20

Abstract

The utility model provides an engine, include: organism, gear chamber cap, bent axle and bearing frame, the organism include first lateral wall and with the second lateral wall that first lateral wall set up relatively, the gear chamber cap is fixed just be located first lateral wall place one side on the organism, the bent axle is close to the one end of gear chamber cap pass through the axle bush with first lateral wall is connected, and the bearing frame is fixed in the second lateral wall, and the bent axle is kept away from the one end of gear chamber is passed through cylindrical roller bearing and is connected with the bearing frame, is equipped with the thrust piece between first lateral wall and the bent axle, is equipped with the retaining ring between cylindrical roller bearing and the bent axle. The utility model discloses a bent axle one end is passed through axle bush and thrust piece and is connected with the organism, and the other end passes through cylindrical roller bearing and is connected with the organism, can effectual control bent axle's axial clearance, and the demand of the zero part expend with heat and contract with cold of adaptation engine during operation avoids the clearance too big to cause the bent axle around the drunkenness or perhaps the clearance undersize causes the bent axle to rotate obstructed.

Description

Engine

Technical Field

The utility model relates to an engine, especially a controllable engine of bent axle clearance.

Background

In the prior art, the axial clearance of a crankshaft of an engine is determined for meeting the requirement of thermal expansion of parts in the working process of the engine, the clearance is too small, the running resistance is generated when the crankshaft rotates, the power consumption of the engine is increased, and even parts are blocked due to thermal expansion; the axial clearance of the crankshaft is too large, the crankshaft is easy to shift back and forth, the connecting rod piston is forced to press the cylinder wall back and forth, abnormal abrasion between the crankshaft and a bearing, between the piston and a cylinder sleeve and the like can be accelerated, upward movement clamping stagnation can be caused, and destructive consequences are brought.

Therefore, there is a need for an engine that overcomes the above-mentioned deficiencies.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing an engine.

According to an aspect of the present invention, there is provided an engine, comprising:

the device comprises a body, a first fixing device and a second fixing device, wherein the body comprises a first side wall and a second side wall opposite to the first side wall;

the gear chamber cover is fixed on the machine body and is positioned on one side of the first side wall;

the end, close to the gear chamber cover, of the crankshaft is connected with the first side wall through a bearing bush;

the bearing seat is fixed on the second side wall, and one end, far away from the gear chamber, of the crankshaft is connected with the bearing seat through a cylindrical roller bearing;

a thrust plate is arranged between the first side wall and the crankshaft, and a bearing retainer ring is arranged between the cylindrical roller bearing and the crankshaft.

Preferably, the crankshaft comprises a first end portion close to one side of the gear chamber cover, a first crank and a first main journal arranged between the first end portion and the first crank, and the bearing bush is arranged between the first side wall and the first main journal.

Preferably, the first crank comprises a first boss arranged around the first main journal, an annular groove is formed in the first side wall corresponding to the first boss, the thrust plate is arranged in the annular groove, the thickness of the thrust plate is larger than the depth of the annular groove, and the thrust plate is arranged between the first boss and the first side wall.

Preferably, the crankshaft further comprises a second end part far away from one side of the gear chamber cover, a second crank and a second main journal arranged between the second end part and the second crank, the cylindrical roller bearing is connected with the second main journal, and the bearing retainer ring is arranged between the second crank and the cylindrical roller bearing.

Preferably, the cylindrical roller bearing includes an outer ring fixed in the bearing housing, an inner ring fixed to the second main journal, and a cylindrical roller disposed between the outer ring and the inner ring.

Preferably, the outer ring comprises a first rib and a second rib which extend towards the inner ring direction from two axial ends of the outer ring, a third rib which extends towards the direction of the outer ring is arranged on one side of the inner ring close to the gear chamber cover, a conical surface is arranged on one side of the inner ring far away from the gear chamber cover, the cylindrical roller is arranged between the first rib and the second rib, and the inner ring can move along the axial direction.

Preferably, the second crank comprises a second boss disposed around the second main journal, and the bearing retainer ring is disposed between the second boss and the third retainer edge.

Preferably, the bearing frame is including being used for the installation cylindrical roller bearing's dead eye and locating the outside mounting groove in bearing aperture, the mounting groove is located on the terminal surface of bearing frame towards the organism inside, be equipped with the locating part that is used for preventing that the outer lane from removing in the mounting groove.

Preferably, the limiting member comprises a fixing portion fixed in the mounting groove, a transition portion extending from the fixing portion to one side where the gear chamber cover is located, and a limiting portion extending from the transition portion to the direction where the inner ring is located along an axis perpendicular to the bearing hole.

Preferably, a main oil passage is arranged in the machine body, a crankshaft oil passage is arranged in the crankshaft, an oil passing groove is arranged on the inner surface of the bearing bush along the circumferential direction of the crankshaft, and the crankshaft oil passage is communicated with the main oil passage through the oil passing groove.

Compared with the prior art, the utility model provides a pair of engine has following beneficial effect:

one end of the crankshaft is connected with the engine body through the bearing bush and the thrust plate, the other end of the crankshaft is connected with the engine body through the cylindrical roller bearing, the axial gap of the crankshaft can be effectively controlled, the requirements of expansion with heat and contraction with cold of parts during the work of an engine are met, and the phenomenon that the crankshaft is blocked due to the fact that the gap is too large and the crankshaft moves back and forth or the gap is too small is avoided.

Drawings

The invention will be described in further detail with reference to the following drawings and embodiments:

FIG. 1 is a cross-sectional view of an engine of the present invention;

FIG. 2 is an enlarged view of FIG. 1 at A;

FIG. 3 is an enlarged view of projection 1 at B;

fig. 4 is a perspective view of the present invention;

fig. 5 is a partial cross-sectional view of the present invention;

fig. 6 is a rear view of the bearing seat of the present invention;

FIG. 7 is a cross-sectional view taken along line B-B of FIG. 6;

fig. 8 isbase:Sub>A sectional view taken along the linebase:Sub>A-base:Sub>A of fig. 1.

The bearing comprises a machine body 1, a first side wall 11, an annular groove 111, a second side wall 12, a second side wall 13, a bearing seat 131, a bearing hole 132, a mounting groove 132, a limiting piece 133, a fixing portion 1331, a transition portion 1332, a limiting portion 1333, a main oil passage 14, a gear chamber cover 2, a crankshaft 3, a first end portion 31, a first crank 32, a first boss 321, a first boss 33, a first main journal 34, a second end portion 35, a second crank 351, a second boss 36, a second main journal 37, a crankshaft oil passage 4, a bearing bush 41, an oil groove 42, a through hole 42, a cylindrical roller bearing 5, an outer ring 51, an outer ring 511, a first flange 512, a second flange 52, an inner ring 521, a third flange 522, a conical surface 53, a cylindrical roller 6, a thrust plate 7, a bearing retainer ring 8 and an oil seal.

Detailed Description

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

For the sake of simplicity, only the parts relevant to the present invention are schematically shown in the drawings, and they do not represent the actual structure as a product. Moreover, in the interest of brevity and understanding, only one of the components having the same structure or function is illustrated schematically or designated in some of the drawings. In this document, "a" means not only "only one of this but also a case of" more than one ".

It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.

In this context, it is to be understood that, unless otherwise explicitly stated or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In addition, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.

In order to more clearly illustrate embodiments of the present invention or technical solutions in the prior art, specific embodiments of the present invention will be described below with reference to the accompanying drawings. It is obvious that the drawings in the following description are only examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be obtained from these drawings without inventive effort.

Referring to fig. 1 and 3, an engine includes a body 1, a gear chamber cover 2, and a crankshaft 3. Organism 1 includes first lateral wall 11 and the relative second lateral wall 12 that sets up with first lateral wall 11, and gear chamber cover 2 is fixed on organism 1 and is located one side at first lateral wall 11 place, is fixed with bearing frame 13 on the second lateral wall 12, and axle bush 4 is passed through to the one end of bent axle 3 and is connected with first lateral wall 11, and the other end of bent axle 3 passes through cylindrical roller bearing 5 and is connected with bearing frame 13.

Referring to fig. 1, the crankshaft 3 includes a first end 31 near a side of the gear chamber cover 2, a second end 34 far from the side of the gear chamber cover 2, a first crank 32 near the first sidewall 11, a second crank 35 near the second sidewall 12, a first main journal 33 interposed between the first end 31 and the first crank 32, and a second main journal 36 interposed between the second end 34 and the second crank 35.

The first side wall 11 is provided with a first crank hole (not labeled), the first end 31 passes through the first crank hole, the first main journal 33 is disposed in the first crank hole and contacts with an inner wall of the first crank hole through the bearing bush 4, and the bearing bush 4 is disposed between the first side wall 11 and the first main journal 33.

Referring to fig. 2, the first crank 32 includes a first boss 321 disposed around the first main journal 33, and the first boss 321 protrudes from the first crank 32 toward the first sidewall 11. An annular groove 111 is formed in the first side wall 11 corresponding to the first boss 321, a thrust plate 6 is arranged in the annular groove 111, and the thrust plate 6 is arranged between the first boss 321 and the first side wall 11.

The thickness of the thrust plate 6 is greater than the depth of the annular groove 111, so that one side of the thrust plate 6 contacts the first boss 321, the other side of the thrust plate 6 contacts the bottom surface of the annular groove 111, and the outer circumferential surface of the thrust plate 6 is attached to the inner circumferential wall of the annular groove 111.

Referring to fig. 3, the second side wall 12 is provided with a bearing seat 13, the second side wall 12 is provided with a mounting hole (not shown) coaxially disposed with the first crank hole, a portion of the bearing seat 13 is disposed in the mounting hole, and another portion of the bearing seat 13 is fixed to the second side wall 12 by bolts. The bearing housing 13 includes a bearing hole 131 coaxially disposed with the first crank shaft hole, the second end portion 34 passes through the bearing hole 131, and the second main journal 36 is disposed in the bearing hole 131 and contacts an inner wall of the bearing hole 131 through the cylindrical roller bearing 5.

The cylindrical roller bearing 5 includes an outer ring 51 fixed in the bearing hole 131, an inner ring 52 fixed to the second main journal 36, and cylindrical rollers 53 interposed between the outer ring 51 and the inner ring 52. The outer race 51 includes a first rib 511 and a second rib 512 extending from both axial ends thereof in the direction of the inner race 52. The inner ring 52 is provided with a third blocking edge 521 at a side close to the gear chamber cover 2, a tapered surface 522 is provided at a side of the inner ring 52 far from the gear chamber cover 2, the tapered surface 522 is contracted from the direction of the first end 31 to the direction of the second end 34, and the inner ring 52 can move along the axial direction relative to the outer ring 51 and the cylindrical roller 53.

The first rib 511 and the tapered surface 522 are located on the same side of the cylindrical roller 53, and the third rib 521 and the second rib 512 are located on the same side of the cylindrical roller 53. The second crank 35 includes a second boss 351 provided around the second main journal 36, and the second boss 351 protrudes from the second crank 35 in a direction away from the gear chamber cover 2. A bearing retainer 7 is arranged between the second boss 351 and the third retaining edge 521.

Referring to fig. 3, 4, 5 and 6, a mounting groove 132 is formed radially outside the bearing hole 131, the mounting groove 132 is formed on an end surface of the bearing housing 13 facing the inside of the machine body 1, and the mounting groove 132 is formed in a fan shape along an outer circumference of the bearing hole 131. A stopper 133 for preventing the outer ring 51 from moving is provided in the mounting groove 132.

The limiting member 133 includes a fixing portion 1331 fixed in the mounting groove 132, a transition portion 1332 extending from the fixing portion 1331 to a side of the gear chamber cover 2, and a limiting portion 1333 extending from the transition portion 1332 along a direction perpendicular to the axis of the bearing hole 131 toward the inner ring 52. An oil seal 8 is arranged between the bearing seat 13 and the second end part 34, so that the sealing performance is enhanced, and the engine oil is prevented from leaking.

One end of the crankshaft 3 is connected with the engine body 1 through a bearing bush 4 and a thrust plate 6, and the other end of the crankshaft is connected with the engine body 1 through a cylindrical roller bearing 5, so that the axial clearance of the crankshaft 3 can be effectively controlled, the requirements of expansion with heat and contraction with cold of parts during the working of an engine are met, and the phenomenon that the crankshaft moves back and forth when the clearance is too large, so that the piston is forced to be unevenly stressed and contacted with the cylinder wall, and abnormal abrasion between the piston and the cylinder sleeve is accelerated; when the clearance is too small, the rotation of the crankshaft 3 is prevented, the power consumption of the engine is increased, and even the clamping stagnation caused by the thermal expansion of the machine parts is avoided.

Referring to fig. 2 and 8, a main oil gallery 14 through which engine oil passes is further provided in the engine body 1, a crankshaft oil gallery 37 is provided in the crankshaft 3, an oil passing groove 41 is provided in an inner surface of the bearing bush 4 along a circumferential direction of the crankshaft 3, and a through hole 42 communicating the main oil gallery 14 and the oil passing groove 41 is further provided in the bearing bush 4. The main oil gallery 14 is communicated with the crankshaft oil gallery 37 through a through hole 42 and an oil passing groove 41, and engine oil in the main oil gallery 14 sequentially enters the crankshaft oil gallery 37 through the through hole 42 and the oil passing groove 41 to lubricate the connection part of the crankshaft 3 and the connecting rod. The crankshaft oil passage 37 does not extend to the second main journal 36 and does not communicate with the cylindrical roller bearing 5.

It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present invention without departing from the spirit and scope of the invention. Thus, it is intended that the present invention cover the modifications and variations of this invention provided they come within the scope of the appended claims and their equivalents.

Claims

1. An engine, comprising:

the device comprises a machine body, a first positioning device and a second positioning device, wherein the machine body comprises a first side wall and a second side wall opposite to the first side wall;

2. The engine of claim 1, wherein the crankshaft includes a first end portion adjacent to a side of the gear case cover, a first crank, and a first main journal disposed between the first end portion and the first crank, the bearing shell being disposed between the first side wall and the first main journal.

3. The engine of claim 2, wherein the first crank comprises a first boss disposed around the first main journal, the first side wall has an annular recess corresponding to the first boss, the thrust plate is disposed in the annular recess and has a thickness greater than a depth of the annular recess, and the thrust plate is disposed between the first boss and the first side wall.

4. The engine of claim 1, wherein the crankshaft further comprises a second end portion on a side away from the gear chamber cover, a second crank, and a second main journal disposed between the second end portion and the second crank, wherein the cylindrical roller bearing is coupled to the second main journal, and wherein the retainer ring is disposed between the second crank and the cylindrical roller bearing.

5. The engine of claim 4, wherein the cylindrical roller bearing comprises an outer race secured within a bearing housing, an inner race secured to the second main journal, and cylindrical rollers disposed between the outer race and the inner race.

6. The engine of claim 5, wherein the outer ring includes a first rib and a second rib extending from both axial ends thereof toward the inner ring, the inner ring includes a third rib extending toward the outer ring on a side thereof close to the gear chamber cover, the inner ring includes a tapered surface on a side thereof away from the gear chamber cover, and the cylindrical roller is disposed between the first rib and the second rib, and the inner ring is axially movable.

7. The engine of claim 6, wherein the second crank comprises a second boss disposed about the second main journal, the circlip being disposed between the second boss and a third flange.

8. The engine according to claim 5, wherein the bearing seat comprises a bearing hole for mounting the cylindrical roller bearing and a mounting groove arranged at an outer side of the bearing hole, the mounting groove is arranged on an end surface of the bearing seat facing the inside of the engine body, and a limiting member for preventing the outer ring from moving is arranged in the mounting groove.

9. The engine according to claim 8, wherein the limiting member comprises a fixing portion fixed in the mounting groove, a transition portion extending from the fixing portion to a side where the gear chamber cover is located, and a limiting portion extending from the transition portion in a direction perpendicular to an axis of the bearing hole toward the inner race.

10. The engine according to claim 1, wherein a main oil passage is provided in the engine body, a crankshaft oil passage is provided in the crankshaft, and a crank oil passage is provided in an inner surface of the bearing shell in a circumferential direction of the crankshaft, the crank oil passage being communicated with the main oil passage through the crank oil passage.