CN218670168U - Crank structure for crankshaft and engine - Google Patents
Crank structure for crankshaft and engine Download PDFInfo
- Publication number
- CN218670168U CN218670168U CN202223166768.5U CN202223166768U CN218670168U CN 218670168 U CN218670168 U CN 218670168U CN 202223166768 U CN202223166768 U CN 202223166768U CN 218670168 U CN218670168 U CN 218670168U
- Authority
- CN
- China
- Prior art keywords
- crank
- functional groove
- longitudinal
- crankshaft
- section
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Shafts, Cranks, Connecting Bars, And Related Bearings (AREA)
Abstract
The utility model discloses a crank structure and engine for bent axle, including the crank body that has the crank eccentric orfice, the crank body is connected in the main journal of bent axle, the predetermined position of crank body is sunken in the outside-in of established shape and is formed the function groove, the function groove is located the circumference of crank eccentric orfice; under the condition that the overall dimension of the crank is not changed, the mass of the crank is reduced, the bending strength of the crank is maintained or improved, the rotational inertia of the crank is maintained or improved, the expected design target of the crank is achieved, and the design requirement of the crank is met.
Description
Technical Field
The utility model relates to an engine and engine accessories field, concretely relates to crank structure and engine for bent axle.
Background
The crankshaft is the most important part in the engine, bears the force transmitted by the connecting rod, converts the force into torque, outputs the torque through the crankshaft and drives other accessories on the engine to work, and the crankshaft is subjected to the combined action of centrifugal force of rotating mass, gas inertia force with periodic change and reciprocating inertia force to bear the action of bending and twisting load. Therefore, the crankshaft is required to have sufficient strength and rigidity, and the surface of the journal needs to be wear-resistant, work uniformly and balance well.
As shown in fig. 1, 2 and 3, the stressed cross sections 2 on the left and right sides of the crank eccentric hole 1 of the existing crankshaft and the stressed cross section 4 in the region between the eccentric hole 1 and the main journal 3 are all solid structures, the weight is always reduced as much as possible in the process of pursuing crankshaft lightweight design, the method for reducing the weight is realized by reducing the external dimension 5 to achieve lightweight, because the size of the eccentric hole 1 is not changed, the method for reducing the external dimension 5 inevitably causes the weakening of the bending strength of the stressed cross section 2 and the stressed cross section 4, meanwhile, the method for reducing the external dimension 5 inevitably causes the reduction of the rotational inertia of the crankshaft, the method for reducing the weight by reducing the external dimension 5 is inevitably limited by the bending strength of the cross sections and the rotational inertia of the crankshaft, and therefore, the limit of the reduced weight often cannot reach the expected target.
Therefore, in order to solve the above problems, a crank structure for a crankshaft and an engine are needed, which can reduce the mass of the crank while maintaining or improving the bending strength of the crank and the rotational inertia of the crank while maintaining or improving the rotational inertia of the crank, while ensuring that the overall dimensions of the crank are not changed, so as to achieve the desired design target of the crankshaft and meet the design requirements of the crankshaft.
SUMMERY OF THE UTILITY MODEL
In view of this, the utility model aims at overcoming the defect among the prior art, provide a crank structure and engine for bent axle, can guarantee under the unchangeable condition of crank overall dimension, reduce the articulate quality, maintain or improve articulate bending strength simultaneously to and maintain or improve articulate inertia simultaneously, reach the anticipated design target of bent axle, satisfy the design demand of bent axle.
The utility model discloses a crank structure for bent axle, including the crank body that has crank eccentric orfice, this body coupling of crank is in the main journal of bent axle, the preset position of crank body is with the sunken function groove that forms of set shape outside-in, the function groove is located the circumference of crank eccentric orfice. The circumferential direction is the circumferential direction around the circumferential direction of the eccentric hole of the crank, the outer part is the outer surface of the crank body, and the inner part is the entity direction facing the crank body, which is not described again; the crank body is provided with a plurality of functional grooves, the functional grooves are formed in the preset positions of the crank body, the mass of the crank can be reduced under the condition that the overall dimension of the crank is not changed, the preset positions can be any positions on the crank body, such as the outer wall surface of the crank body or the inner wall surface of the crank body surrounding the circumferential direction of an eccentric hole of the crank, or the front end surface of the crank body or the rear end surface of the crank body in the axial direction, or bending positions of the two end surfaces of the crank body can be formed, the purpose is to reduce weight of the crank body under the condition that the overall dimension of the crank is not damaged, the preset shapes can be annular or semi-annular surrounding the circumferential direction of the eccentric hole of the crank, or continuous wavy surrounding the circumferential direction of the eccentric hole of the crank, or spiral grooves spirally arranged along the axial direction on the outer wall surface of the circumferential direction of the crank body, or a plurality of grooves arranged on two sides of the eccentric hole of the crank in a centrosymmetric manner by taking the eccentric hole of the crank as a center, or spherical grooves or rectangular grooves formed in the preset positions, the crank body can meet the requirement of maintaining the rotating center of the crank body of the crankshaft, and the crankshaft, thereby achieving the expected crankshaft, and the design.
Furthermore, the surface passing through the central axis of the main journal and the central axis of the eccentric hole of the crank is a longitudinal section of the crank, and the functional grooves comprise a first functional groove and a second functional groove which are not positioned on the same side of the longitudinal section at the same time; the first functional groove is formed by sinking a preset position I of the crank body in an established shape I from outside to inside, and the second functional groove is formed by sinking a preset position II of the crank body in an established shape II from outside to inside. Because the position restriction of crank eccentric orfice to the wall at the vertical top of crank body is thinner, leads to satisfying as far as possible and not arranging the functional groove at the vertical top of crank eccentric orfice, in order to guarantee the bending strength of crank body, preset position I and preset position II can confirm on crank body relatively the vertical section symmetry, or confirm on crank body with specific streamlined curve position in the bent axle rotation direction, the shape of set shape I and set shape II can be the same or different, arrange according to the design demand, it is suitable to satisfy and maintain or improve the inertia of crank, and the first functional groove and the second functional groove that do not lie in the vertical section homonymy simultaneously can more do benefit to and guarantee that the center of rotation of crank body is located the main journal center of rotation of bent axle, reduce the plastic degree of difficulty and the matching degree of difficulty, shorten the cycle that reaches the expected design target of bent axle, satisfy the design demand of bent axle.
Further, the first functional groove and the second functional groove are symmetrically formed on the crank body by taking the longitudinal section as a reference. This symmetry mode is the axial symmetry mode, and the symmetry axis is the vertical section, and in this scheme, set shape I is the same with set shape II, and also the structure of first function groove and second function groove is the same arranges the position differently, first function groove and second function groove can be on the preceding terminal surface of crank body or crank body rear end face, also can be on the horizontal left side terminal surface of crank body and right side terminal surface, further reduce the degree of difficulty that the center of rotation of crank body and the main journal center of rotation of bent axle match, shorten the cycle that reaches the expected design target of bent axle, satisfy the design demand of bent axle.
Furthermore, a plane passing through the central axis of the eccentric hole of the crank and perpendicular to the longitudinal section is a cross section, the transverse left end face of the crank body is sunken from outside to inside in a set shape I to form a first functional groove, and the transverse right end face of the crank body is sunken from outside to inside in a set shape I to form a second functional groove. The shape of first function groove and second function groove is the same and is established shape I in this scheme, first function groove is located the horizontal left side terminal surface of crank body, the second function groove is located the horizontal right side terminal surface of crank body, because the distance that the horizontal both sides terminal surface of crank body reachd crank eccentric hole center is longer, be the preferred position that first function groove and second function groove arranged, can satisfy the demand that does not destroy crank overall dimension, and can improve the bending strength of crank body and increase bent axle inertia under the equivalent quality, satisfy the lightweight design demand of bent axle, the cycle that reaches the expected design target of bent axle can be shortened in the suggestion of this scheme.
Further, the first functional groove is located in the longitudinal middle of the left end face, and the second functional groove is located in the longitudinal middle of the right end face. The quick alignment matching of the rotation center of the crank body and the rotation center of the main journal of the crank shaft is met, the period of reaching the expected design target of the crank shaft is shortened, the bending strength of the crank body is improved, and the rotational inertia of the crank shaft is increased.
Further, the first functional groove extends upwards along the longitudinal direction to penetrate through the longitudinal upper end face of the crank body, and the second functional groove extends upwards along the longitudinal direction to penetrate through the longitudinal upper end face of the crank body. So as to further reduce the mass of the crankshaft body and meet the design requirement of lightweight crankshaft.
Further, on the cross section, the set shape I comprises a transverse functional groove front section and a transverse functional groove rear section, the transverse functional groove front section is transversely close to the crank eccentric hole, the transverse functional groove rear section is transversely far away from the crank eccentric hole, the transverse functional groove front section is semicircular in outline, two sides of the transverse functional groove rear section are parallel to a transverse rectangle, and the two sides of the rectangle parallel to the transverse direction are respectively and correspondingly connected with two semicircular end points;
on a longitudinal section which passes through the functional groove at a corresponding position and is perpendicular to the cross section, the established shape I comprises a longitudinal front section of the functional groove and a longitudinal rear section of the functional groove, the longitudinal front section of the functional groove is longitudinally close to the balance block, the longitudinal rear section of the functional groove is longitudinally far away from the balance block, the profile of the longitudinal front section of the functional groove is semicircular, the profile of the longitudinal rear section of the functional groove is rectangular, two sides of the profile of the longitudinal rear section of the functional groove are parallel to the longitudinal direction, and two sides of the rectangular parallel to the longitudinal direction are respectively correspondingly connected with two semicircular end points;
the diameter of the semicircle forming the transverse front section of the functional groove is D 1 A semicircular diameter D of a longitudinal front section of the functional groove 2 ，D 1 ＝D 2 . As shown in the figure, the arrangement of the given shape I on the crank body can reduce the mass of the crank body on the premise of ensuring the overall dimension of the crank body, improve the bending strength of the crank body, and simultaneously increase the rotational inertia of the crank shaft, and tests show that under the condition that the mass of two structures shown in the figure 1 and the figure 5 is equal, the crank body with the functional groove structure has the advantages that the bending resistance coefficient of the cross section of the crank body is improved by 20-30%, the rotational inertia is increased by 1-5%, the design of the crank body can be accurately controlled within a certain range, and the period for achieving the expected design target of the crank shaft is shortened.
Further, D 1 The ratio of the thickness of the crank body to the longitudinal thickness of the crank body is between 0.4 and 0.7, and D is the same as D in the scheme 1 Is 0.556; on the cross section, the distance between the inner wall surface of the eccentric hole of the crank and the transverse left end surface of the crank body or the transverse right end surface of the crank body is L 1 The depth of the functional groove is L 2 ，L 1 /L 2 Is between 0.4 and 0.6, in this case L 1 /L 2 The value of (A) is 0.503. The functional groove is more reasonable in size, the influence of the size on other performances of the crank body is reduced, and the bending resistance of the crank body is reduced due to overlarge functional groove, or the requirement of crankshaft light weight design cannot be met due to undersize functional grooveFurther meet the design requirements of the crank body to achieve the expected design target of the crank shaft.
Furthermore, the stressed cross sections of the two sides of the crank eccentric hole of the crankshaft and the stressed cross section of the area between the eccentric hole and the main journal are designed into a C-shaped open functional groove structure, so that the purpose of reducing the mass is realized, the appearance size is unchanged, and compared with the existing solid structure, under the condition that the mass of the two structures is equal, the crank structure of the crankshaft is improved by 20-30% in the cross section bending resistance coefficient, and is designed into an I-shaped groove structure, so that the rotational inertia is increased by 1-5%; thereby improving the section bending strength and the moment of inertia.
The present disclosure also discloses an engine including a crankshaft having the crank configuration. The crank body is provided with the functional groove in the preset shape, so that the mass of the crank can be reduced under the condition that the overall dimension of the crank is not changed, the preset position can be any position on the crank body, the rotating center of the crank body can be favorably positioned at the rotating center of the main journal of the crank, the crank aims to maintain or improve the bending strength of the crank on the premise of reducing the weight of the crank body, and the rotating inertia of the crank is maintained or improved on the premise of reducing the weight of the crank body, the expected design target of the crank is achieved, and the design requirement of the crank is met.
The utility model has the advantages that: the utility model discloses a crank structure and engine for bent axle through the function groove that forms set shape on the crank body is predetermine the position, can guarantee under the unchangeable condition of crank overall dimension, reduce articulate quality, predetermine the position and can be the optional position on the crank body, the center of rotation that can satisfy the crank body is located the main journal center of rotation of bent axle and is suitable, its aim at subtracts under the prerequisite of heavy to the crank body, maintains simultaneously or improves articulate bending strength to and maintain simultaneously or improve articulate inertia, reach the anticipated design target of bent axle, satisfy the design demand of bent axle.
Drawings
The invention will be further described with reference to the following figures and examples:
FIG. 1 is a schematic front view of a crank of the prior art;
FIG. 2 isbase:Sub>A schematic view of the structure of FIG. 1 along line A-A;
FIG. 3 is a side view of a prior art crank;
FIG. 4 is a schematic structural view of the present invention;
fig. 5 is a schematic view of the front view structure of the present invention;
FIG. 6 is a schematic view of the structure of FIG. 5 along the direction B-B according to the present invention;
fig. 7 is a schematic side view of the present invention.
Detailed Description
Fig. 1 is a schematic structural view of the present invention, as shown in the figure, the longitudinal direction is a vertical direction in fig. 5, and the transverse direction is a horizontal direction in fig. 5, which is not described again; the crank structure for the crankshaft in the embodiment includes a crank body having a crank eccentric hole 01, the crank body is connected to a main journal 03 of the crankshaft, a predetermined position of the crank body is recessed from outside to inside in a predetermined shape to form a functional groove 06, and the functional groove 06 is located in the circumferential direction of the crank eccentric hole 01. The circumferential direction is the circumferential direction around the crank eccentric hole 01, the outer direction is the outer surface of the crank body, and the inner direction is the entity direction facing the crank body, which is not described again; the technical scheme can ensure that the quality of the crank is reduced under the condition of unchanging the overall dimension of the crank by forming the functional groove 06 with a preset shape on the preset position of the crank body, wherein the preset position can be any position on the crank body, such as the outer wall surface of the crank body or the inner wall surface of the crank body surrounding the circumferential direction of the eccentric hole 01 of the crank, or the front end surface of the crank body or the rear end surface of the crank body positioned in the axial direction, or can be formed at the bending position of the two end surfaces of the crank body, the purpose is to reduce the weight of the crank body under the condition of not destroying the overall dimension of the crank, the preset shape can be a ring shape or a semi-ring shape surrounding the circumferential direction of the eccentric hole 01 of the crank, the crank body is a continuous wave shape surrounding the circumference of the crank eccentric hole 01, or a spiral groove shape formed on the circumferential outer wall surface of the crank body and spirally arranged along the axial direction, or a plurality of grooves which are arranged on two sides of the crank eccentric hole 01 in a central symmetry mode by taking the crank eccentric hole 01 as a symmetry center, or a spherical groove or a rectangular groove formed at a preset position, and the like, so that the rotation center of the crank body is preferably positioned at the rotation center of the main journal 03 of the crankshaft, the crank body is lightened, the bending strength of the crank is simultaneously maintained or improved, the rotation inertia of the crank is simultaneously maintained or improved, the expected design target of the crankshaft is achieved, and the design requirement of the crankshaft is met.
In this embodiment, a plane passing through the central axis of the main journal 03 and the central axis of the crank eccentric hole 01 is a longitudinal section of the crank, and the functional groove 06 includes a first functional groove and a second functional groove which are not located on the same side of the longitudinal section at the same time; the first functional groove is formed by sinking a preset position I of the crank body in an established shape I from outside to inside, and the second functional groove is formed by sinking a preset position II of the crank body in an established shape II from outside to inside. Due to the position limitation of the crank eccentric hole 01 and the thin wall surface of the longitudinal top of the crank body, the functional grooves 06 are not distributed on the longitudinal top of the crank eccentric hole 01 as far as possible to ensure the bending strength of the crank body, the preset positions I and II can be symmetrically determined on the crank body relative to the longitudinal section or determined on the crank body by a specific streamline curve position in the rotation direction of the crank shaft, the shapes of the set shape I and the set shape II can be the same or different, the first functional groove and the second functional groove which are not simultaneously positioned on the same side of the longitudinal section can be better beneficial to ensuring that the rotation center of the crank body is positioned at the rotation center of a main journal 03 of the crank shaft according to the design requirement, the shaping difficulty and the matching difficulty are reduced, the period for achieving the expected design target of the crank shaft is shortened, and the design requirement of the crank shaft is met.
In this embodiment, the first functional groove and the second functional groove are symmetrically formed on the crank body with the vertical section as a reference. This symmetry mode is the axial symmetry mode, and the symmetry axis is the vertical section, and in this scheme, set shape I is the same with set shape II, and also the structure of first function groove and second function groove is the same arranges the position differently, first function groove and second function groove can be on the preceding terminal surface of crank body or crank body rear end face, also can be on the horizontal left side terminal surface of crank body and right side terminal surface, further reduce the degree of difficulty that the center of rotation of crank body and the main journal 03 rotation center of bent axle match, shorten the cycle that reaches the expected design target of bent axle, satisfy the design demand of bent axle.
In this embodiment, a plane passing through the central axis of the eccentric hole 01 of the crank and perpendicular to the longitudinal section is a cross section, the horizontal left end surface of the crank body is recessed from outside to inside in a predetermined shape i to form a first functional groove, and the horizontal right end surface of the crank body is recessed from outside to inside in a predetermined shape i to form a second functional groove. The shape of first function groove and second function groove is the same and is established shape I in this scheme, first function groove is located the horizontal left side terminal surface of crank body, the second function groove is located the horizontal right side terminal surface of crank body, because the distance that the horizontal both sides terminal surface of crank body reachd crank eccentric orfice 01 center is longer, be the preferred position that first function groove and second function groove arranged, can satisfy the demand that does not destroy crank overall dimension, and can improve the bending strength of crank body and increase bent axle inertia under the equivalent quality, satisfy the lightweight design demand of bent axle, the proposition of this scheme can shorten the cycle that reaches the expected design target of bent axle.
In this embodiment, the first functional groove is located in the middle of the left end surface in the longitudinal direction, and the second functional groove is located in the middle of the right end surface in the longitudinal direction. The quick alignment matching of the rotation center of the crank body and the main journal 03 rotation center of the crankshaft is met, the period for achieving the expected design target of the crankshaft is shortened, the bending strength of the crank body is improved, and meanwhile the rotational inertia of the crankshaft is increased.
In this embodiment, the first functional groove extends upward in the longitudinal direction to penetrate through the upper end surface of the crank body in the longitudinal direction, and the second functional groove extends upward in the longitudinal direction to penetrate through the upper end surface of the crank body in the longitudinal direction. So as to further reduce the mass of the crankshaft body and meet the design requirement of lightweight crankshaft.
In this embodiment, in the cross section, the predetermined shape i includes a transverse front section of the functional groove 06 and a transverse rear section of the functional groove 06, the transverse front section of the functional groove 06 is transversely close to the eccentric crank hole 01, the transverse rear section of the functional groove 06 is transversely far away from the eccentric crank hole 01, the transverse front section of the functional groove 06 is semicircular in profile, two sides of the transverse rear section of the functional groove 06 are parallel to a transverse rectangle, and two sides of the rectangle parallel to the transverse direction are respectively and correspondingly connected with two semicircular end points;
on a longitudinal section which passes through the functional groove 06 in a corresponding position and is perpendicular to the cross section, the set shape I comprises a longitudinal front section of the functional groove 06 and a longitudinal rear section of the functional groove 06, the longitudinal front section of the functional groove 06 is longitudinally close to the balance block, the longitudinal rear section of the functional groove 06 is longitudinally far away from the balance block, the profile of the longitudinal front section of the functional groove 06 is semicircular, the profile of the longitudinal rear section of the functional groove 06 is rectangular, two sides of the longitudinal rear section of the functional groove 06 are parallel to the longitudinal direction, and two sides of the rectangular parallel to the longitudinal direction are respectively correspondingly connected with two semicircular end points;
the diameter of the semicircle forming the transverse front section of the functional groove 06 is D 1 A semicircular diameter D forming a longitudinal front section of the functional groove 06 2 ，D 1 ＝D 2 . As shown in the figure, the arrangement of the given shape I on the crank body can reduce the mass of the crank body on the premise of ensuring the overall dimension of the crank body, improve the bending strength of the crank body, and simultaneously increase the rotational inertia of the crank shaft, and the crank body with the functional groove 06 structure is tested under the condition that the two structures in the figure 1 and the figure 5 are equal in mass, the bending resistance coefficient of the cross section of the crank body is improved by 20% -30%, the rotational inertia is increased by 1% -5%, the design of the crank body can be accurately controlled within a certain range, and the period for achieving the expected design target of the crank shaft is shortened.
In this example, D 1 The ratio of the thickness of the crank body to the longitudinal thickness of the crank body is between 0.4 and 0.7, and D is the same as D in the scheme 1 Is 0.556; on the cross section, the distance between the inner wall surface of the crank eccentric hole 01 and the transverse left end surface or the transverse right end surface of the crank body is L 1 The depth of the functional groove 06 is L 2 ，L 1 /L 2 Is between 0.4 and 0.6, in this case L 1 /L 2 The value of (A) is 0.503. The functional groove 06 is formed in a more reasonable size, the influence of the size on other performances of the crank body is reduced, for example, the bending resistance of the crank body is reduced due to the fact that the functional groove 06 is formed too large, or the situation that the requirement for crankshaft lightweight design is not met due to the fact that the functional groove 06 is formed too small is solved, the design requirement of the crank body is further met, and the expected design target of the crankshaft is achieved.
In the embodiment, the stressed cross sections 02 at two sides of the crank eccentric hole 01 of the crankshaft and the stressed cross section 04 in the area between the eccentric hole 01 and the main journal 03 are designed into a C-shaped open functional groove 06 structure, so that the purpose of reducing the mass is realized, the overall dimension 05 is unchanged, compared with the existing solid structure, under the condition that the mass of the two structures is equal, through experimental analysis and actual measurement, the bending resistance coefficient of the cross section of the crank structure of the crankshaft is improved by 20% -30%, meanwhile, the two transverse sides of the integral crank are inwards sunken to form an I-shaped groove structure as shown in fig. 6, and the rotational inertia of the crank structure is increased by 1% -5%; thereby improving the section bending strength and the moment of inertia.
The scheme also discloses an engine, which comprises a crankshaft with the crank structure. The crank body is provided with the functional groove 06 in the preset shape, so that the crank quality can be reduced under the condition that the overall dimension of the crank is not changed, the preset position can be any position on the crank body, the rotating center of the crank body is preferably located at the main journal 03 rotating center of the crank, the crank is maintained or improved in bending strength and the rotating inertia of the crank under the premise that the crank body is reduced in weight, the expected design target of the crank is achieved, and the design requirement of the crank is met.
Finally, although the present invention has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the present invention can be modified or replaced by other means without departing from the spirit and scope of the present invention, which should be construed as limited only by the appended claims.
Claims (10)
1. A crank construction for a crankshaft, characterized by: the crank body is connected to a main journal of a crankshaft, a preset position of the crank body is formed by sinking in a set shape from outside to inside to form a functional groove, and the functional groove is located in the circumferential direction of the crank eccentric hole.
2. A crank configuration for a crankshaft as claimed in claim 1, wherein: meanwhile, the surface passing through the central axis of the main journal and the central axis of the eccentric hole of the crank is a longitudinal section of the crank, and the functional grooves comprise a first functional groove and a second functional groove which are not positioned on the same side of the longitudinal section at the same time; the first functional groove is formed by sinking a preset position I of the crank body in an established shape I from outside to inside, and the second functional groove is formed by sinking a preset position II of the crank body in an established shape II from outside to inside.
3. A crank configuration for a crankshaft as claimed in claim 2, wherein: the first functional groove and the second functional groove are symmetrically formed on the crank body by taking the longitudinal section as a reference.
4. A crank configuration for a crankshaft as claimed in claim 3, wherein: the horizontal left end face of the crank body is sunken from outside to inside in a set shape I to form a first functional groove, and the horizontal right end face of the crank body is sunken from outside to inside in a set shape I to form a second functional groove.
5. A crank configuration for a crankshaft as claimed in claim 4, wherein: the first functional groove is located in the longitudinal middle of the left end face, and the second functional groove is located in the longitudinal middle of the right end face.
6. A crank configuration for a crankshaft as claimed in claim 5, wherein: the first functional groove extends upwards along the longitudinal direction to penetrate through the longitudinal upper end face of the crank body, and the second functional groove extends upwards along the longitudinal direction to penetrate through the longitudinal upper end face of the crank body.
7. A crank configuration for a crankshaft as claimed in claim 6, wherein: on the cross section, the set shape I comprises a transverse functional groove front section and a transverse functional groove rear section, the transverse functional groove front section is semicircular in outline, two sides of the transverse functional groove rear section are parallel to a transverse rectangle, and the two sides of the rectangle parallel to the transverse direction are respectively and correspondingly connected with two semicircular end points;
on a longitudinal section which passes through the functional groove at a corresponding position and is vertical to the cross section, the set shape I comprises a longitudinal front section of the functional groove and a longitudinal rear section of the functional groove, the profile of the longitudinal front section of the functional groove is semicircular, the profile of the longitudinal rear section of the functional groove is rectangular, two sides of the rectangular are parallel to the longitudinal direction, and the two sides of the rectangular which are parallel to the longitudinal direction are respectively and correspondingly connected with two semicircular end points;
the diameter of the semicircle forming the transverse front section of the functional groove is D 1 A semicircular diameter D forming a longitudinal front section of the functional groove 2 ，D 1 ＝D 2 。
8. A crank configuration for a crankshaft as claimed in claim 7, wherein: d 1 And the thickness of the crank body in the longitudinal direction is between 0.4 and 0.7.
9. A crank configuration for a crankshaft as claimed in claim 7, wherein: on the cross section, the distance between the inner wall surface of the eccentric hole of the crank and the transverse left end surface of the crank body or the transverse right end surface of the crank body is L 1 The depth of the functional groove is L 2 ，L 1 /L 2 The value of (A) is between 0.4 and 0.6.
10. An engine, characterized in that: the engine includes a crankshaft having a crank configuration as claimed in any one of claims 1 to 9.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223166768.5U CN218670168U (en) | 2022-11-28 | 2022-11-28 | Crank structure for crankshaft and engine |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223166768.5U CN218670168U (en) | 2022-11-28 | 2022-11-28 | Crank structure for crankshaft and engine |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN218670168U true CN218670168U (en) | 2023-03-21 |
Family
ID=85540976
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223166768.5U Active CN218670168U (en) | 2022-11-28 | 2022-11-28 | Crank structure for crankshaft and engine |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN218670168U (en) |
-
2022
- 2022-11-28 CN CN202223166768.5U patent/CN218670168U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN100482485C (en) | Four-point suspension arm | |
| KR101404982B1 (en) | Method of manufacturing a crankshaft | |
| JPH0354021B2 (en) | ||
| CN205479254U (en) | Whole lightweight of new energy automobile increases turns round reduction gear | |
| CN106734839B (en) | A method of preventing defect occur in variable-section variable wall thickness jackshaft rotary swaging process | |
| CN218670168U (en) | Crank structure for crankshaft and engine | |
| US20060283287A1 (en) | Highly rugged lightweight connecting-rod | |
| CN209244524U (en) | A kind of coal mine stem | |
| KR20110058647A (en) | Connecting rod and method of manufacturing thereof | |
| CN216618307U (en) | High-strength lightweight structure cold extrusion cross axle | |
| KR950007628B1 (en) | Wrist pin | |
| CN210265471U (en) | Tubular section full-processing connecting rod for connecting piston and crankshaft | |
| CN2683516Y (en) | Bicycle hollow crank | |
| CN206129837U (en) | Extension nut of die forging structure | |
| US20080168859A1 (en) | Crankshaft with reinforcing member | |
| US20080302207A1 (en) | Crankshaft | |
| CN207311029U (en) | Torsion beam cross beam, torsion beam assembly and vehicle with torsion beam assembly | |
| CN107654521A (en) | One kind transmission axis connection fork | |
| CN1663872A (en) | Hollow crank of bicycle and its cold forging forming method | |
| CN201047382Y (en) | Link of IC engine | |
| CN201650484U (en) | High strength thin-walled piston | |
| CN220636150U (en) | Spool | |
| CN205113437U (en) | Pull rod spherical shell for motor vehicle | |
| CN218408142U (en) | Hollow ball head hollow core shaft of automobile action rod | |
| US20180029414A1 (en) | Axle beam with variable wall thickness and variable cross-sectional shape and method of making same |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |