CN216198523U

CN216198523U - Pressure plate structure for preventing crankshaft from shifting, engine and motorcycle

Info

Publication number: CN216198523U
Application number: CN202122680489.XU
Authority: CN
Inventors: 韩超博; 林健明
Original assignee: Jiangmen Dachangjiang Group Co Ltd
Current assignee: Jiangmen Dachangjiang Group Co Ltd
Priority date: 2021-11-03
Filing date: 2021-11-03
Publication date: 2022-04-05
Anticipated expiration: 2031-11-03

Abstract

The utility model discloses a pressure plate structure for preventing a crankshaft from moving, an engine and a motorcycle, wherein the pressure plate structure comprises a pressure plate body and a fixing piece, the pressure plate body is provided with two first matching parts, the two first matching parts are symmetrically arranged at two opposite ends of the pressure plate body, and the first matching parts can be in limit matching with the side wall of a crankcase; the fixing member is used for fixing the pressure plate body to the crankcase. The engine and the motorcycle comprise the pressure plate structure for preventing the crankshaft from moving. The clamp plate body has the first cooperation portion that the symmetry was established at its relative both ends, and the spacing cooperation of lateral wall of first cooperation portion and crankcase, when fixing the clamp plate body to the crankcase through the mounting on, no matter just adorn in time or adorn conversely, as long as make the spacing cooperation of lateral wall of first cooperation portion and crankcase can accomplish the installation, do not have the problem of just adorning and adorning conversely, thereby solved the tradition because the dismantlement repacking scheduling problem that leads to of dress reversely, the assembly efficiency is improved, and the assembly is also very convenient.

Description

Pressure plate structure for preventing crankshaft from shifting, engine and motorcycle

Technical Field

The utility model relates to the technical field of engines, in particular to a pressure plate structure for preventing a crankshaft from moving, an engine and a motorcycle.

Background

During the operation of the engine, the crankshaft is driven to rotate by the reciprocating stroke of the piston, so that power is output. However, the crankshaft is often prone to irregular movement under the impact of the reciprocating stroke of the piston, and then the bearing on the crankshaft is moved, and the movement of the bearing often brings about Noise and wear problems, which not only affect the crankshaft movement stress performance of the engine, but also affect the NVH performance (Noise, Vibration and Harshness) of the engine.

The bearing at the end of the crankshaft is pressed by a pressing plate to limit the bearing, so that the bearing is prevented from moving, and the crankshaft is prevented from moving axially. However, the conventional pressure plate is easy to be reversely assembled during assembly, and much time is required for disassembling and reassembling after reverse assembly, so that the assembly efficiency is reduced.

SUMMERY OF THE UTILITY MODEL

In view of this, it is necessary to provide a platen structure for preventing the play of a crankshaft, an engine, and a motorcycle; the pressing plate structure for preventing the crankshaft from moving not only is convenient to assemble the pressing plate body, but also has the function of preventing the crankshaft from being reversely assembled during assembly, and improves the assembly efficiency; the engine comprises the pressure plate structure for preventing the crankshaft from moving, is convenient to assemble, can solve the problems of low assembly efficiency and the like caused by reverse assembly, and improves the assembly efficiency; the motorcycle adopts the engine, the assembly efficiency of the pressure plate body is high, and the overall production efficiency is improved.

The technical scheme is as follows:

one embodiment provides a platen structure for preventing play of a crankshaft, including:

the pressing plate comprises a pressing plate body, wherein the pressing plate body is provided with two first matching parts which are symmetrically arranged at two opposite ends of the pressing plate body, and the first matching parts can be in limit matching with the side wall of the crankcase;

a fixing member for fixing the pressure plate body to the crankcase.

Above-mentioned a clamp plate structure for preventing bent axle drunkenness, the clamp plate body has the symmetry and establishes the first cooperation portion at its relative both ends, and the spacing cooperation of the lateral wall of first cooperation portion and crankcase, when fixing the clamp plate body to the crankcase through the mounting, just adorn or adorn instead in any time, as long as make the spacing cooperation of the lateral wall of first cooperation portion and crankcase can accomplish the installation, do not have the problem of just adorning and adorning instead, thereby solved the tradition because the dismantlement repacking scheduling problem that leads to of dress instead, the assembly efficiency is improved, and the assembly is also very convenient.

The technical solution is further explained below:

in one embodiment, in the length direction of the pressure plate body, the distance between the starting ends of the two first matching parts is a first distance, the distance between the ending ends of the two first matching parts is a second distance, and the second distance is smaller than the first distance.

In one embodiment, the side wall of the crankcase is provided with a matching section which is arranged in a plane or an arc surface, the first matching portion and the matching section are arranged correspondingly, and a tapered structure is formed in the area, located between the two first matching portions, of the pressure plate body.

In one embodiment, the pressing plate body is further provided with two second matching parts, the two second matching parts are arranged at two opposite ends of the pressing plate body, and the maximum distance between the two second matching parts is larger than the maximum distance between the two first matching parts.

In one embodiment, the pressing plate body has a pressing area, the pressing plate body presses against a bearing on a crankshaft in the crankcase through the pressing area, and the pressing area is located between the two second matching portions.

In one embodiment, the second matching portions and the first matching portions are arranged along the length direction of the pressing plate body, the two second matching portions are symmetrically arranged at two opposite ends of the pressing plate body, and the symmetric surfaces of the two second matching portions and the symmetric surfaces of the two first matching portions are coplanar.

In one embodiment, the pressing plate body is further provided with a third matching part, and the third matching part is recessed towards the inner side of the pressing plate body;

the third matching parts are arranged at two opposite ends of the pressing plate body and are symmetrically arranged between the first matching part and the second matching part at the corresponding side;

the fixed position of the fixing piece on the pressing plate body is located between the pressing area and any one of the first matching parts.

In one embodiment, the fixing member is a fixing bolt, the pressing plate body is provided with a mounting through hole, the position of the mounting through hole corresponds to the position of the symmetry plane of the two first matching parts, and the fixing member is fixed with the crankcase through the mounting through hole so as to fix the pressing plate body to the crankcase.

Another embodiment provides an engine including a platen structure for preventing crankshaft drunkenness as in any of the above aspects.

Above-mentioned engine adopts aforementioned a clamp plate structure for preventing the bent axle drunkenness, and not only convenient assembling can solve the assembly inefficiency scheduling problem that the dress is anti-to cause moreover, has improved assembly efficiency.

A further embodiment provides a motorcycle comprising an engine as described in the above solution.

Above-mentioned motorcycle adopts aforementioned engine, and the assembly efficiency of clamp plate body is high, has improved holistic production efficiency.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

Furthermore, the drawings are not drawn to a 1:1 scale, and the relative sizes of the various elements in the drawings are drawn only by way of example, and not necessarily to true scale.

FIG. 1 is a schematic view of the assembly of the pressing plate body, the fixing member and the bearing according to the embodiment of the present invention;

FIG. 2 is a schematic view of the assembly of the platen body, the fixing member and the crankcase according to the embodiment of the utility model;

FIG. 3 is a top view of the platen body, the stationary member, and the crankcase of the embodiment of FIG. 2;

FIG. 4 is a schematic view of the cross-sectional structure A-A in the embodiment of FIG. 3;

FIG. 5 is a schematic structural diagram of the pressing plate body in the embodiment of FIG. 2.

Reference is made to the accompanying drawings in which:

100. a pressing plate body; 110. a first mating portion; 120. a second mating portion; 130. a third mating portion; 140. a pressing area; 200. a fixing member; 300. a crankcase; 310. a mating segment; 400. and a bearing.

Detailed Description

Embodiments of the present invention are described in detail below with reference to the accompanying drawings:

in order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

As shown in fig. 1, the crankshaft rotates under the reciprocating motion of the piston, and the continuous impact of the piston on the crankshaft causes the crankshaft to generate irregular motion, which may cause the bearing 400 at the end of the crankshaft to axially move, thereby causing noise and other problems, and also affecting the motion stress performance of the crankshaft, therefore, the axial movement of the bearing 400 needs to be limited.

Referring to fig. 2 to 5, an embodiment provides a platen structure for preventing a crankshaft from moving, including a platen body 100 and a fixing member 200. Wherein, mounting 200 is used for fixing clamp plate body 100 on crankcase 300, and bent axle and the epaxial bearing 400 of bent axle all are located crankcase 300, and it is spacing to support to press to the epaxial bearing 400 of bent axle through clamp plate body 100, realizes preventing the effect of bent axle axial float through the spacing realization to bearing 400. Specifically, the method comprises the following steps:

as shown in fig. 5, the pressing plate body 100 is provided with two first matching portions 110, the two first matching portions 110 are symmetrically arranged at two opposite ends of the pressing plate body 100, and the first matching portions 110 can be in limit matching with the side walls of the crankcase 300.

As shown in fig. 2 to 5, the fixing member 200 is used to fix the platen body 100 to the crankcase 300.

This a clamp plate structure for preventing bent axle drunkenness, clamp plate body 100 has the symmetry and establishes the first cooperation portion 110 at its relative both ends, and the spacing cooperation of the lateral wall of first cooperation portion 110 and crankcase 300, when fixing clamp plate body 100 to crankcase 300 through mounting 200 on, dress or turn over the dress at any time, as long as make the spacing cooperation of the lateral wall of first cooperation portion 110 and crankcase 300 can accomplish the installation, there is not the problem of dress and turning over the dress, thereby the dismantlement repacking scheduling problem that the tradition leads to owing to the dress is turned over has been solved, and the assembly efficiency is improved, and it is also very convenient to assemble.

As shown in fig. 5, two first cooperation portions 110 are roughly respectively located the left end and the right end of clamp plate body 100, and the first cooperation portion 110 of left end and the first cooperation portion 110 of right-hand member are roughly the symmetry setting, set up like this, when fixing clamp plate body 100 to crankcase 300, no matter be just adorning or the dress of turning over, two first cooperation portions 110 homoenergetic carry out spacing cooperation with the lateral wall of crankcase 300, thereby the homoenergetic is installed, and just adorn and do not influence the normal function performance of clamp plate body 100 after the dress of turning over, in order to satisfy the limiting displacement to bearing 400, and finally realize preventing the effect of bent axle drunkenness.

Due to the limit fit between the first fitting part 110 and the side wall of the crankcase 300, the first fitting part 110 and the side wall of the crankcase 300 can be pre-assembled and aligned through the limit fit when being assembled, so that the assembly efficiency is improved, and the assembly precision is ensured. In addition, since the side wall of the crankcase 300 is in the limit-fit relationship with the first fitting portion 110, if the other region of the platen body 100 abuts against the side wall of the crankcase 300, the side wall is not necessarily in the limit-fit relationship, and normal installation cannot be completed, thereby preventing misassembly.

It should be noted that the side wall of the crankcase 300 may be a curved surface, a flat surface, or an uneven surface, and the first matching portion 110 is disposed corresponding to the side wall of the crankcase 300 for matching and limiting.

In one embodiment, referring to fig. 5, in the length direction of the platen body 100, a distance between the starting ends of the two first matching portions 110 is a first distance, a distance between the ending ends of the two first matching portions 110 is a second distance, and the second distance is smaller than the first distance.

As shown in fig. 5, the length direction of the platen body 100 is substantially vertical, the first engaging portion 110 and the second engaging portion 120 are respectively located at the left end and the right end of the platen body 100, the first engaging portion 110 extends from top to bottom, the starting end of the first engaging portion 110 is the upper end of the first engaging portion 110, and the terminating end of the first engaging portion 110 is the lower end of the first engaging portion 110. As shown in fig. 5, the distance between the starting ends of the two first fitting portions 110 is greater than the distance between the terminating ends of the two first fitting portions 110.

So set up for the initiating terminal and the termination end of first cooperation portion 110 are distinguished easily, and then are convenient for make the assembly quality can be fast with the position control of clamp plate body 100 correct and rapid Assembly.

It can be understood that:

since the first fitting portion 110 needs to be in limit fitting with the contour of the side wall of the crankcase 300, the contour of the first fitting portion 110 corresponds to the contour of the side wall of the crankcase 300 to perform limit fitting.

In one embodiment, referring to fig. 3 to 5, the side wall of the crankcase 300 has a fitting section 310 disposed in a plane or an arc surface, the first fitting portion 110 is disposed corresponding to the fitting section 310, and a tapered structure is formed in a region of the platen body 100 located between the two first fitting portions 110.

In the embodiment shown in fig. 3 and 4, the edge surface of the first fitting portion 110 is in limit-fitting engagement with the wall surface of the side wall of the crankcase 300.

In the embodiment shown in fig. 3 to 5, the side wall of the crankcase 300 is substantially planar, and the edge of the first fitting portion 110 is disposed corresponding to the side wall of the crankcase 300, so that the edge of the first fitting portion 110 and the side wall of the crankcase 300 are abutted to each other to perform a limit fitting when being installed, so that the side wall of the crankcase 300 is used for performing a quick assembly and a limit fitting, and the accuracy of the assembly position is ensured.

In the embodiment shown in fig. 5, since the distance between the starting ends of the two first matching portions 110 is greater than the distance between the terminating ends of the two first matching portions 110, and the first matching portions 110 are disposed corresponding to the side walls disposed in a plane, the terminating ends of the first matching portions 110 are inclined toward the middle of the platen body 100 relative to the starting ends of the first matching portions 110, so that the region forms a tapered structure.

As shown in fig. 5, the lower half portion of the platen body 100, that is, the corresponding area between the two first engaging portions 110 of the platen body 100, is a tapered structure, when an assembler assembles, whether the current position and posture of the platen body 100 need to be adjusted is identified by the tapered structure of the platen body 100, if the current position and posture of the platen body 100 are approximately equivalent to those of normal assembly, the current position and posture can be directly matched with the side wall of the crankcase 300 in a limiting manner, and if the tapered structure of the platen body 100 is not equivalent to those of normal assembly, the position and posture of the tapered structure of the platen body 100 are adjusted, so as to achieve rapid assembly, and assembly can be performed without complex judgment, and assembly can be performed without worrying about finding reverse assembly after assembly, thereby greatly improving assembly efficiency.

In one embodiment, referring to fig. 5, the pressing plate body 100 is further provided with two second matching portions 120, the two second matching portions 120 are arranged at two opposite ends of the pressing plate body 100, and the maximum distance between the two second matching portions 120 is greater than the maximum distance between the two first matching portions 110.

As shown in fig. 5, the pressing plate body 100 is further provided with second matching portions 120, the second matching portions 120 are symmetrically arranged at the left end and the right end of the pressing plate body 100, and the second matching portions 120 are located above the first matching portions 110. Simultaneously, the biggest interval between two second cooperation portions 120 is greater than the biggest interval between two first cooperation portions 110, so set up, make the assembler in the assembly, can judge which is first cooperation portion 110 through the dimensional relation of second cooperation portion 120 and first cooperation portion 110, and then determine which region of clamp plate body 100 should carry out spacing cooperation with the lateral wall of crankcase 300, and then adjust the position and the gesture of clamp plate body 100, prepare for subsequent spacing cooperation and fixed, and accomplish the assembly of clamp plate body 100 rapidly, the operation is simpler and convenient, the assembly efficiency is improved, and prevent the condition such as dress is reversed, the misloading.

In one embodiment, referring to fig. 5, the pressing plate body 100 has a pressing area 140, the pressing plate body 100 presses against a bearing 400 on a crankshaft in the crankcase 300 through the pressing area 140, and the pressing area 140 is located between two second matching portions 120.

As shown in fig. 5, the pressing area 140 of the pressing plate body 100 is located between the two second matching portions 120, and since the maximum distance between the second matching portions 120 is greater than the distance between the two first matching portions 110, that is, it can be understood that the width between the second matching portions 120 is greater than the distance between the two first matching portions 110, the pressing area 140 located between the two second matching portions 120 can provide better pressing force.

It can be understood that:

the pressing region 140 may directly come into pressing contact with the bearing 400 to restrict axial play of the bearing 400. In specific implementation, the abutting area 140 may be provided with an abutting hole, a push bolt top pin is fixed in the abutting hole, and the push bolt top pin is in interference fit with the bearing 400 to limit axial movement of the bearing 400, which is not described again.

In addition, it should be noted that, because the pressing plate body 100 can be installed in either a forward or reverse manner, the pressing area 140 should be able to match the pressed acting position of the bearing 400 in either a forward or reverse manner, and preferably, the pressing area 140 may correspond to the position of the symmetric plane of the two first matching portions 110, so that the relative position of the pressing area 140 is substantially unchanged in either a forward or reverse manner, thereby ensuring that the pressing area can be in pressing contact with the bearing 400, which is not described herein again.

In one embodiment, referring to fig. 5, the second matching portions 120 and the first matching portions 110 are disposed along the length direction of the pressing plate body 100, two of the second matching portions 120 are symmetrically disposed at two opposite ends of the pressing plate body 100, and the symmetry planes of the two second matching portions 120 are coplanar with the symmetry planes of the two first matching portions 110.

As shown in fig. 5, the second engaging portion 120 and the first engaging portion 110 are disposed along the length direction of the platen body 100, in the length direction of the platen body 100, the second engaging portion 120 is located at the rear, the first engaging portion 110 is located at the front, the two second engaging portions 120 are also symmetrically disposed at two opposite ends of the platen body 100, and the symmetry planes of the two second engaging portions 120 are coplanar with the symmetry plane of the first engaging portion 110.

It can be understood that:

since the symmetric planes of the two first engaging portions 110 and the symmetric planes of the two second engaging portions 120 are coplanar, if the first engaging portion 110 and the second engaging portion 120 at the left end of the platen body 100 in the view of fig. 5 are regarded as a whole and the first engaging portion 110 and the second engaging portion 120 at the right end of the platen body 100 are regarded as a whole, the left and right whole bodies are symmetrically disposed at the left and right ends of the platen body 100.

As shown in fig. 5, the width of the first engaging portion 110 is smaller than the width of the second engaging portion 120, so that the assembling posture of the platen body 100 can be rapidly determined during assembling, and subsequent assembling can be performed, thereby improving assembling efficiency.

In one embodiment, referring to fig. 5, the pressing plate body 100 is further provided with a third matching portion 130, and the third matching portion 130 is recessed toward the inner side of the pressing plate body 100. Specifically, the method comprises the following steps:

as shown in fig. 5, two third engaging portions 130 are symmetrically disposed at two opposite ends of the platen body 100, and the third engaging portion 130 is located between the first engaging portion 110 and the second engaging portion 120 at the corresponding side.

As shown in fig. 5, the third engaging portions 130 are symmetrically disposed at two opposite ends of the platen body 100, and the third engaging portions 130 are located between the second engaging portion 120 and the first engaging portion 110. If the first, second and third

engaging portions

110, 120 and 130 at the left end of the platen body 100 are regarded as a whole and the first, second and third

engaging portions

110, 120 and 130 at the right end are regarded as a whole, the whole of the left end and the whole of the right end are symmetrical.

So set up, on the one hand processing is more convenient, does not need complicated mould, and on the other hand, the relative both ends total symmetry of clamp plate body 100 sets up to no matter just adorn or reverse dress all can accomplish the assembly during the assembly, reduces the assembly degree of difficulty, and improves assembly efficiency.

In the embodiment shown in fig. 5, the third engaging portion 130 is recessed toward the inner side of the platen body 100, so that the material cost of the platen body 100 can be reduced, and the weight of the platen body 100 can be reduced.

In one embodiment, referring to fig. 5, the second matching portion 120 is arc-shaped; the third mating portion 130 is also contoured in an arc. So set up for processing is more convenient.

In the embodiment shown in fig. 5, the first matching portion 110, the second matching portion 120 and the third matching portion 130 are jointly arranged, so that the whole structure of the pressure plate body 100 looks like a gourd-shaped arrangement, the posture of the pressure plate body 100 during assembly can be confirmed more conveniently, and the assembly efficiency can be improved.

In one embodiment, referring to fig. 5, the fixing position of the fixing member 200 on the pressing plate body 100 is located between the pressing area 140 and any one of the first matching portions 110.

As shown in fig. 5, the fixing member 200 is located at a middle position of the pressing plate body 100, the pressing area 140 is located at an upper position of the pressing plate body 100, and the first engaging portion 110 is located below a left end or a right end of the pressing plate body 100, so that the fixing position of the fixing member 200 on the pressing plate body 100 is located between the pressing area 140 and any one of the first engaging portions 110.

Alternatively, the platen body 100 is provided with mounting through holes, which may be screw holes or non-screw holes, so that the fixing members 200 pass through and are fixed to the crankcase 300 to fix the platen body 100 to the crankcase 300.

It can be understood that: the opening position of the installation through hole, that is, the fixing position of the fixing member 200 on the pressing plate body 100, is not described again.

In one embodiment, referring to fig. 1 to 5, the fixing members 200 are fixing bolts, the pressing plate body 100 is provided with mounting through holes corresponding to the positions of the symmetry planes of the two first matching portions 110, and the fixing members 200 are fixed to the crankcase 300 through the mounting through holes to fix the pressing plate body 100 to the crankcase 300.

In one embodiment, referring to fig. 5, only one fixing member 200 is provided and corresponds to the symmetric surfaces of the two first engaging portions 110, so that the pressing plate body 100 can be assembled regardless of being assembled in a forward or reverse manner, thereby improving the assembling efficiency.

In the embodiment shown in fig. 5, one fixing member 200 is provided, so as to reduce the number of fastening points on the pressing plate body 100 by reducing the number of the fixing members 200, simplify the structure of the pressing plate body 100, and reduce the number of fixing bolts, thereby achieving the purpose of simplifying the structure, reducing the weight of the pressing plate body 100, and reducing the number of parts, so as to achieve the purpose of saving the production cost.

Another embodiment provides an engine including a platen structure for preventing crankshaft drunkenness as in any of the above embodiments.

The engine can be a water-cooled engine, and due to the adoption of the pressing plate structure for preventing the crankshaft from moving, the assembly is convenient, the problems of low assembly efficiency and the like caused by reverse assembly can be solved, and the assembly efficiency is improved.

Yet another embodiment provides a motorcycle including an engine as described in the previous embodiment.

The motorcycle adopts the engine, the assembly efficiency of the pressure plate body 100 is high, and the overall production efficiency is improved.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. 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. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A platen structure for preventing play of a crankshaft, comprising:

a fixing member for fixing the pressure plate body to the crankcase.

2. The platen structure according to claim 1, wherein a distance between starting ends of the two first engaging portions is a first distance, a distance between terminating ends of the two first engaging portions is a second distance, and the second distance is smaller than the first distance in a length direction of the platen body.

3. The platen structure for preventing the crankshaft from shifting according to claim 2, wherein the side wall of the crankcase has a fitting section disposed in a plane or an arc surface, the first fitting portion is disposed corresponding to the fitting section, and a tapered structure is formed in a region of the platen body between the two first fitting portions.

4. The platen structure according to claim 2, wherein the platen body is further provided with two second engaging portions provided at opposite ends of the platen body, and a maximum distance between the two second engaging portions is greater than a maximum distance between the two first engaging portions.

5. The platen structure for preventing a crankshaft from shifting according to claim 4, wherein the platen body has a pressing area, the platen body presses a bearing on the crankshaft in the crankcase through the pressing area, and the pressing area is located between the two second fitting portions.

6. The platen structure according to claim 5, wherein the second engaging portions and the first engaging portions are disposed along a length direction of the platen body, two of the second engaging portions are symmetrically disposed at opposite ends of the platen body, and a symmetry plane of the two second engaging portions is coplanar with a symmetry plane of the two first engaging portions.

7. The platen structure for preventing a crankshaft from shifting according to claim 6, wherein the platen body is further provided with a third engaging portion recessed toward an inner side of the platen body;

8. The platen structure according to any one of claims 1 to 7, wherein the fixing member is a fixing bolt, the platen body is provided with a mounting through hole corresponding in position to a plane of symmetry of the two first engagement portions, and the fixing member is fixed to the crankcase through the mounting through hole to fix the platen body to the crankcase.

9. An engine comprising the platen structure for preventing a crankshaft from coming apart as claimed in any one of claims 1 to 8.

10. A motorcycle characterized by comprising the engine as claimed in claim 9.