CN217814838U

CN217814838U - Engine rear end extension output structure

Info

Publication number: CN217814838U
Application number: CN202221237854.8U
Authority: CN
Inventors: 侯泉利; 王法耀; 叶永鹏
Original assignee: Shandong Yunnei Power Co ltd; Kunming Yunnei Power Co Ltd
Current assignee: Shandong Yunnei Power Co ltd; Kunming Yunnei Power Co Ltd
Priority date: 2022-05-23
Filing date: 2022-05-23
Publication date: 2022-11-15
Anticipated expiration: 2032-05-23

Abstract

The utility model relates to an engine rear end extension output structure belongs to mechanical transmission technical field. The structure comprises a crankshaft, a flywheel shell, a rear oil seal, a flywheel, a gear ring and the like; a rear oil seal is arranged between the flywheel shell and the crankshaft; the flywheel shell is sleeved on the crankshaft and fixed on the engine body; the inner ends of the flywheel and the gear ring are sleeved with the rear end of the crankshaft and are fixed on the crankshaft through flywheel bolts; the outer end of the transmission shaft is sleeved with the flywheel and the rear end of the gear ring and is fixed on the flywheel and the gear ring through transmission shaft bolts; the rolling bearing is arranged at the center of the cover plate of the flywheel shell through pressing; the flywheel shell cover plate is sleeved on the transmission shaft through a rolling bearing and then fixed with the flywheel shell through a flywheel shell cover plate bolt; the rear wheel of the crankshaft pulley is sleeved on the transmission shaft and is fixed on the transmission shaft through a crankshaft pulley bolt. The utility model discloses both increased the anti load capacity that the bent axle rear end is connected, improved the security of the relevant spare part of engine rear end again, easily popularize and apply.

Description

Engine rear end extension output structure

Technical Field

The utility model belongs to the technical field of mechanical transmission structure, concretely relates to engine rear end extension output structure.

Background

In the application and development field of diesel engines, particularly the application field of diesel engines for non-roads, the rear end of the engine is a main power take-off port, wherein part of vehicle types such as corn harvesters, ship machines, rice harvesters, bundling machines and other machines use belts to transmit power, and a relatively simple crankshaft belt wheel direct connection configuration is used for reducing material cost in an engine factory.

The engine rear end output structure who commonly uses on the existing market, the concrete expression is that the flywheel is connected the face band pulley internal spigot outward and is used for guaranteeing the axiality, and the screw hole of a plurality of equipartitions is used for installing the crankshaft pulley rear wheel in the simultaneous processing. The rear wheel of the crankshaft belt pulley is mostly an iron casting, various groove types are processed according to configuration requirements, and the rear wheel of the crankshaft belt pulley is provided with a spigot and a through hole which are matched with the flywheel and is directly fixed on the flywheel through bolt connection.

This back-end output is simple in construction, but has the following disadvantages:

(1) The transmission of moment is completely depended on the connecting bolt, and the layout of the connecting bolt is tighter, so the output moment is limited, and the connecting bolt can be broken when the moment transmitted by the crankshaft pulley is overlarge. (2) When the crank pulley with 4 grooves or more is matched, the tail end of the pulley is far away from the engine body in order to meet the matched use. In addition, the rear end of the engine bears a large load to form a structural form of a large power arm at the rear end of the engine, and the sum of lateral forces borne by the rear wheel of the crankshaft belt pulley is directly transmitted to the crankshaft due to the fact that the structure is simple and has no supporting point, so that oil seals and a main shaft bush are easily abnormally abraded, and the crankshaft can be broken in severe cases.

Therefore, how to overcome the defects of the prior art is a problem which needs to be solved urgently in the technical field of the current mechanical transmission structure.

Disclosure of Invention

The utility model aims at solving prior art's not enough, provide an engine rear end extension output structure, can strengthen the reliability of the relevant spare part of engine rear end and the life of engine, through using the proof, the utility model discloses multiplicable engine rear end output accounts for the life who surpasss 30% engine in engine total output.

In order to achieve the above object, the utility model adopts the following technical scheme:

an engine rear end extension output structure comprises a crankshaft, a flywheel shell, a rear oil seal, a flywheel bolt, a flywheel, a gear ring, a transmission shaft bolt, a flywheel shell cover plate bolt, a rolling bearing, a transmission shaft, a crankshaft belt pulley rear wheel and a crankshaft belt pulley bolt;

a rear oil seal is arranged between the flywheel shell and the crankshaft; the flywheel shell is sleeved on the crankshaft and fixed on the engine body;

the inner ends of the flywheel and the gear ring are sleeved with the rear end of the crankshaft and are fixed on the crankshaft through flywheel bolts;

the outer end of the transmission shaft is sleeved with the flywheel and the rear end of the gear ring and is fixed on the flywheel and the gear ring through transmission shaft bolts;

the rolling bearing is press-mounted in the center of the cover plate of the flywheel shell; the flywheel shell cover plate is sleeved on the transmission shaft through a rolling bearing and then fixed with the flywheel shell through a flywheel shell cover plate bolt;

the rear wheel of the crankshaft belt pulley is sleeved on the transmission shaft and is fixed on the transmission shaft through a crankshaft belt pulley bolt.

Further, preferably, the rear oil seal is pressed on the flywheel housing.

Further, preferably, the flywheel and the gear ring are provided with positioning pin holes at positions corresponding to the crankshaft, and positioning pins i are arranged between the flywheel and the crankshaft and between the flywheel and the gear ring, so that the coaxial positioning of the flywheel and the crankshaft is realized through the positioning pin holes and the positioning pins i.

Further, preferably, the flywheel and the gear ring are provided with positioning pin holes at positions corresponding to the transmission shaft, and positioning pins II are arranged between the flywheel and the transmission shaft, so that the flywheel and the gear ring are coaxially positioned with the transmission shaft through the positioning pin holes and the positioning pins II.

Further, it is preferable that the flywheel housing cover plate and the flywheel housing are positioned by a spigot.

Compared with the prior art, the utility model, its beneficial effect does:

the utility model discloses novel structure, convenient to use, the structure can increase the anti load capacity of bent axle rear end, reduces the unusual wearing and tearing of bent axle, back oil blanket etc. has played the supporting role of rear end extension output. The flywheel and the gear ring are positioned with the crankshaft and the transmission shaft and the flywheel and the gear ring through the positioning pin holes and the positioning pins, and output coaxiality and axial size chain are guaranteed. The use of the rolling bearing not only plays a supporting role, but also minimizes the friction loss. The rear oil seal is involved, so that the sealing performance of the crankcase is ensured, and oil leakage is prevented. The structure of the utility model not only enhances the reliability of relevant parts at the rear end of the engine and the service life of the engine, but also increases the load which can be born at the rear end of the engine; adopt the utility model discloses behind the structure, multiplicable engine rear end output accounts for the life who surpasss 30% engine in engine total output.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be 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 inventive exercise.

FIG. 1 is an overall appearance diagram of the present invention;

FIG. 2 is a sectional view of the whole structure of the present invention;

FIG. 3 is an overall exploded view of the present invention;

FIG. 4 is a reverse overall exploded view of the present invention;

in the figure, 1-crankshaft, 2-flywheel shell, 3-rear oil seal, 4-locating pin I, 5-flywheel bolt, 6-locating pin II, 7-flywheel and gear ring, 8-transmission shaft bolt, 9-flywheel shell cover plate, 10-flywheel shell cover plate bolt, 11-rolling bearing, 12-transmission shaft, 13-crankshaft pulley rear wheel and 14-crankshaft pulley bolt.

Detailed Description

The present invention will be described in further detail with reference to examples.

It will be understood by those skilled in the art that the following examples are illustrative of the present invention only and should not be taken as limiting the scope of the invention. The specific techniques, connections, conditions, or the like, which are not specified in the examples, are performed according to the techniques, connections, conditions, or the like described in the literature in the art or according to the product specification. The materials, instruments or equipment are not indicated by manufacturers, and all the materials, instruments or equipment are conventional products which can be obtained by purchasing.

As used herein, the singular forms "a", "an", "the" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It will be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof. It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

In the description of the present invention, "a plurality" means two or more unless otherwise specified. The terms "inner," "upper," "lower," and the like, refer to an orientation or a state relationship based on that shown in the drawings only for convenience of description and simplicity of description, and do not indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted", "connected" and "provided" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; may be directly connected or indirectly connected through an intermediate. To those of ordinary skill in the art, the specific meaning of the above terms in the present invention is understood according to the specific situation.

It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. It will be further understood that terms, such as those defined in commonly used dictionaries, should be interpreted as having a meaning that is consistent with their meaning in the context of the prior art and will not be interpreted in an idealized or overly formal sense unless expressly so defined herein.

As shown in fig. 1 to 4, an output structure at the rear end of an engine comprises a crankshaft 1, a flywheel housing 2, a rear oil seal 3, a flywheel bolt 5, a flywheel and gear ring 7, a transmission shaft bolt 8, a flywheel housing cover plate 9, a flywheel housing cover plate bolt 10, a rolling bearing 11, a transmission shaft 12, a crankshaft pulley rear wheel 13 and a crankshaft pulley bolt 14;

a rear oil seal 3 is arranged between the flywheel housing 2 and the crankshaft 1; the flywheel shell 2 is sleeved on the crankshaft 1 and fixed on the engine body;

the inner ends of the flywheel and the gear ring 7 are sleeved with the rear end of the crankshaft 1 and are fixed on the crankshaft 1 through flywheel bolts 5;

the outer end of the transmission shaft 12 is sleeved with the rear ends of the flywheel and the gear ring 7 and is fixed on the flywheel and the gear ring 7 through a transmission shaft bolt 8;

the rolling bearing 11 is pressed in the center of the flywheel shell cover plate 9; the flywheel housing cover plate 9 is sleeved on the transmission shaft 12 through a rolling bearing 11 and then fixed with the flywheel housing 2 through a flywheel housing cover plate bolt 10;

the crankshaft pulley rear wheel 13 is sleeved on the transmission shaft 12 and fixed on the transmission shaft 12 through a crankshaft pulley bolt 14.

In a preferred scheme, the rear oil seal 3 is pressed on the flywheel housing 2.

In another preferred scheme, the flywheel and the gear ring 7 are provided with positioning pin holes at positions corresponding to the crankshaft 1, positioning pins I4 are arranged between the flywheel and the crankshaft 1 and between the flywheel and the gear ring 7 and the crankshaft 1, and the coaxial positioning of the flywheel and the gear ring 7 and the crankshaft 1 is realized through the positioning pin holes and the positioning pins I4.

In another preferred scheme, the flywheel and the gear ring 7 are provided with positioning pin holes at positions corresponding to the transmission shaft 12, a positioning pin II 6 is arranged between the flywheel and the gear ring 7 and the transmission shaft 12, and coaxial positioning of the flywheel and the gear ring 7 and the transmission shaft 12 is realized through the positioning pin holes and the positioning pin II 6.

More preferably, the flywheel housing cover plate 9 is positioned with the flywheel housing 2 by a spigot.

The utility model discloses in, be equipped with the leakproofness that 3 guarantee the crankcase of back oil blanket between bell housing 2 and the bent axle 1, prevent the oil leak.

The utility model discloses in, through locating pin hole and locating pin location between flywheel and ring gear 7 and bent axle 1, transmission shaft 12 and flywheel and ring gear 7, guarantee the axiality and the axial dimensions chain of output. The flywheel housing cover plate 9 and the flywheel housing 2 are positioned through the seam allowance, and the output coaxiality and the axial size chain are guaranteed. The flywheel housing cover plate 9 is additionally provided with a rolling bearing 11, and the transmission shaft 11 and the crankshaft pulley rear wheel 13 are supported and positioned. The connecting surface of the crankshaft pulley rear wheel 13 and the transmission shaft 12 is provided with a certain taper (preferably 1.

The utility model discloses in, crank pulley can design 4 grooves and above crank pulley, reinforcing rear end power take off.

Preferably, the transmission shaft 12 is arranged between the flywheel housing 2 and the flywheel housing cover plate 9 and between the crankshaft pulley rear wheel 13, is sleeved with the flywheel and the gear ring 7, and is fixed through 6 transmission shaft bolts 5. The transmission shaft 12, the flywheel and the gear ring 7 are respectively provided with a relative positioning pin hole, the transmission shaft 12, the flywheel and the gear ring 7 are further positioned through a positioning pin II 6, the positioning pin II 6 is installed in the positioning pin hole of the flywheel and the gear ring 7 after the engine is installed, the transmission shaft 12 is positioned through the positioning pin II 6, then the transmission shaft is fastened through bolts, the installation convenience is improved, and meanwhile the coaxiality and the axial size chain are well guaranteed. Similarly, the flywheel and the gear ring 7 are provided with positioning pin holes corresponding to the crankshaft 1, positioning pins I4 are arranged between the flywheel and the crankshaft 1 and between the flywheel and the gear ring 7 and the crankshaft 1, and the coaxial positioning of the flywheel and the gear ring 7 and the crankshaft 1 is realized through the positioning pin holes and the positioning pins I4, so that the coaxiality and the axial dimension chain are ensured.

The transmission shaft 12 passes through the flywheel housing cover plate 9 provided with the rolling bearing 11. Be equipped with the bearing draw-in groove on the bell housing apron 9, beat antifriction bearing 11 through the frock and adorn in bell housing apron 9, bell housing apron 9 passes transmission shaft 12 and fixes with bell housing 2 through 12 bell housing apron bolts 10, is equipped with the tang on bell housing 2 and the bell housing apron 9 relative position, fixes a position the axiality of guaranteeing the installation of bell housing apron 9 through the tang. In addition, the main bearing bush contacts with the main journal of the crankshaft 1 and is arranged on the machine body; therefore, the structure can not only increase the load-resisting capacity of the rear end of the crankshaft 1, improve the coaxiality of the crankshaft 1, the engine body and the flywheel shell 2 in a working state, but also reduce the abnormal abrasion of the crankshaft 1, the rear oil seal 3 and the main shaft bush, and play a role in supporting the rear end extension output. The use of the rolling bearing 11 not only serves a supporting function, but also minimizes friction loss.

The outer end of the transmission shaft 12 is sleeved with the inner side of a crankshaft pulley rear wheel 13 and fixed through a crankshaft pulley bolt 14. The transmission shaft 12 and the crankshaft pulley rear wheel 13 are positioned by designing taper, and the structure realizes the maximum pressure-resistant section when the minimum contact surface is realized, so that deformation is not easy to generate. The rear wheel 13 of the crank pulley can be designed into the crank pulley with 4 grooves or more, the inside of the crank pulley is designed to be hollow, the power output at the rear end is enhanced, and the loss of energy work is reduced to a great extent while the manufacturing cost is reduced.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the above embodiments, and that the foregoing embodiments and descriptions are provided only to illustrate the principles of the present invention without departing from the spirit and scope of the present invention. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An engine rear end extension output structure is characterized by comprising a crankshaft (1), a flywheel shell (2), a rear oil seal (3), a flywheel bolt (5), a flywheel and gear ring (7), a transmission shaft bolt (8), a flywheel shell cover plate (9), a flywheel shell cover plate bolt (10), a rolling bearing (11), a transmission shaft (12), a crankshaft belt pulley rear wheel (13) and a crankshaft belt pulley bolt (14);

a rear oil seal (3) is arranged between the flywheel shell (2) and the crankshaft (1); the flywheel shell (2) is sleeved on the crankshaft (1) and is fixed on the engine body;

the inner ends of the flywheel and the gear ring (7) are sleeved with the rear end of the crankshaft (1) and are fixed on the crankshaft (1) through flywheel bolts (5);

the outer end of the transmission shaft (12) is sleeved with the rear ends of the flywheel and the gear ring (7) and is fixed on the flywheel and the gear ring (7) through a transmission shaft bolt (8);

the rolling bearing (11) is pressed at the center of the flywheel shell cover plate (9); the flywheel housing cover plate (9) is sleeved on the transmission shaft (12) through a rolling bearing (11) and then fixed with the flywheel housing (2) through a flywheel housing cover plate bolt (10);

the rear wheel (13) of the crank pulley is sleeved on the transmission shaft (12) and is fixed on the transmission shaft (12) through a crank pulley bolt (14).

2. The engine rear-end extension output structure according to claim 1, characterized in that: and the rear oil seal (3) is pressed on the flywheel shell (2).

3. The engine rear-end elongation output structure according to claim 1, characterized in that: all be equipped with the locating pin hole on flywheel and ring gear (7) and the corresponding position of bent axle (1), be equipped with locating pin I (4) between flywheel and ring gear (7) and bent axle (1), realize the coaxial positioning of flywheel and ring gear (7) and bent axle (1) through locating pin hole and locating pin I (4).

4. The engine rear-end elongation output structure according to claim 1, characterized in that: the flywheel and gear ring (7) are provided with positioning pin holes corresponding to the transmission shaft (12), a positioning pin II (6) is arranged between the flywheel and gear ring (7) and the transmission shaft (12), and coaxial positioning of the flywheel and gear ring (7) and the transmission shaft (12) is realized through the positioning pin holes and the positioning pin II (6).

5. The engine rear-end extension output structure according to claim 1, characterized in that: the flywheel housing cover plate (9) and the flywheel housing (2) are positioned through the seam allowance.