CN115507786A - Connecting rod mass distribution measuring system - Google Patents
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- CN115507786A CN115507786A CN202210976390.0A CN202210976390A CN115507786A CN 115507786 A CN115507786 A CN 115507786A CN 202210976390 A CN202210976390 A CN 202210976390A CN 115507786 A CN115507786 A CN 115507786A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
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- G—PHYSICS
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- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
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Abstract
The application discloses a measuring method for mass distribution of a large end of a connecting rod and a small end of the connecting rod of an engine connecting rod, a measuring system and a measuring device thereof, wherein the measuring method is used for measuring the weight of the large end at the axle center of a large hole of the connecting rod and the weight of the small end at the axle center of a small hole, and comprises the following steps: measuring the total weight of the connecting rod and the center distance between the axle center of a small hole of a small end of the connecting rod and the axle center of a large hole of a large end of the connecting rod; positioning the connecting rod; the distance between the first support position and the second support position is a measurement distance along the horizontal transverse direction; in the horizontal transverse direction, the distance between the axis of the large hole and the first supporting position is a first difference value, and/or the distance between the axis of the small hole and the second supporting position is a second difference value; measuring a first supporting force applied to the large head of the connecting rod by the first supporting position and/or a second supporting force applied to the small head of the connecting rod by the second supporting position; and calculating the weight of the small end at the axle center of the small hole of the connecting rod and/or calculating the weight of the large end at the axle center of the large hole of the connecting rod.
Description
The application is a divisional application of Chinese invention application with the application number of 2022104518866, the application date of 2022, 4 months and 27 days, and the name of the method, the system and the device for measuring the quality distribution of the connecting rod.
Technical Field
The application relates to the field of measurement, in particular to a mass distribution measurement system for a connecting rod big end and a connecting rod small end of an engine connecting rod.
Background
The connecting rod of the engine is used for connecting the piston and the crankshaft, transmitting acting force borne by the piston to the crankshaft and converting reciprocating motion of the piston into rotary motion of the crankshaft. As an important transmission component in an engine, the precision requirement of the mass of each part of a connecting rod is high.
As shown in fig. 1, the connecting rod body is mainly composed of three parts, a connecting rod small end 12 connected with a piston pin; a connecting rod big end 11 connected with the crankshaft and a connecting rod body 13 connecting the small end and the big end. When the engine runs, the smaller end of the connecting rod takes the small hole axis C2 of the small end 12 of the connecting rod as the center to do linear reciprocating motion along with the piston, and the larger end takes the large hole axis C1 of the large end 11 of the connecting rod as the center to do rotary motion together with the connecting rod neck of the crankshaft. Due to the change of the speed and direction of the linear reciprocating motion and the revolving circular motion, the moving connecting rod generates inertia force, and the two inertia forces are in direct proportion to the mass of the big end and the small end of the connecting rod. Therefore, the distribution of the mass of the connecting rod is an important factor affecting the quality of the engine operation.
In practice, mass is measured by measuring the associated weight force. Therefore, as shown in fig. 2, the connecting rods of the same engine need to have the same total weight P and the center of gravity O having the same first distance a from the center C1 of the large hole. When the mass distribution condition of two ends of the gravity center O of the connecting rod is measured, the connecting rod can be arranged in a horizontal state, the weight of a large head at the position of a large hole axis C1 is P1, the weight of a small head at the position of a small hole axis C2 is P2, the second distance from the small hole axis C2 to the gravity center O is b, and the center distance between the small hole axis C2 and the large hole axis C1 is I. According to the parameters, the following parameters can be obtained:
P1+P2＝P；
p2 × I = P × a, i.e., P2= (P × a) ÷ I;
p1 × I = P × b, i.e., P1= (P × b) ÷ I.
However, in actual operation, the position of the center of gravity of the connecting rod is difficult to find quickly and accurately, so that the values of the first distance a and the second distance b are difficult to determine, and the large-head weight P1 and the small-head weight P2 of the connecting rod are difficult to obtain.
Therefore, how to provide an efficient and accurate connecting rod mass distribution measurement scheme becomes a technical problem to be solved in the field.
Disclosure of Invention
In view of the above, the present application provides a system for measuring mass distribution of a large connecting rod end and a small connecting rod end of an engine connecting rod, so as to measure the mass distribution of the engine connecting rod.
According to the application, a connecting rod mass distribution measuring system is provided, which comprises a three-coordinate measuring instrument and a connecting rod mass distribution measuring device, wherein the connecting rod mass distribution measuring device is arranged in an effective measuring space range of the three-coordinate measuring instrument; knowing the total weight P of the connecting rod, the connecting rod mass distribution measuring system is used for measuring the big head weight P1 at the big hole axis C1 and the small head weight P2 at the small hole axis C2 of the connecting rod; characterized in that the connecting rod mass distribution measuring device comprises: a base; the supporting mechanism comprises a first supporting piece and a second supporting piece which are arranged on the base along the horizontal transverse direction X, the first supporting piece and the second supporting piece are respectively used for forming point support for a connecting rod big end and a connecting rod small end of the connecting rod in the horizontal transverse direction X, so that the length direction of the connecting rod extends along the horizontal transverse direction X, the hole axes of the connecting rod small end and the connecting rod big end of the connecting rod extend along the vertical direction Z, and the distance between the point supports of the first supporting piece and the second supporting piece is a measuring distance L; at least one of the first support and the second support is provided with a force measuring unit which is used for measuring a first support force R1 applied to the big end of the connecting rod by the first support and/or a second support force R2 applied to the small end of the connecting rod by the second support; the three-coordinate measuring machine is used for measuring under the condition that the connecting rod is supported on the supporting mechanism: the center distance I is between the small hole axis C2 of the small end of the connecting rod and the large hole axis C1 of the large end of the connecting rod; in the horizontal transverse direction X, the distance between the large hole axis C1 and the first support position is a first difference value delta a, and/or the distance between the small hole axis C2 and the second support position is a second difference value delta b; and calculating the weight P2 of the small end at the axle center C2 of the small hole of the connecting rod according to a formula, and/or calculating the weight P1 of the large end at the axle center C1 of the large hole of the connecting rod according to a formula.
Preferably, the support height of at least one of the first and second supports is adjustable.
Preferably, the link mass distribution measuring device includes a limiting mechanism, which is mounted on the base, the limiting mechanism including: a lateral limiting unit for limiting the horizontal position of the connecting rod in the horizontal lateral direction X; and/or a longitudinal limiting unit for limiting the horizontal position of the connecting rod in the horizontal longitudinal direction Y.
Preferably, the lateral limiting unit comprises a limiting member movable in a horizontal lateral direction X, and a displacement sensor for measuring a movement position of the limiting member; and/or the longitudinal limiting unit comprises a plurality of stop members of which the stop positions can be adjusted in the horizontal longitudinal direction Y.
According to the technical scheme of the application, under the condition that the gravity center position of the connecting rod is difficult to determine, the mass distribution condition of the small end and the large end of the connecting rod can be accurately obtained through measurement of the connecting rod in a positioning state.
Additional features and advantages of the present application will be described in detail in the detailed description which follows.
Drawings
The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate an embodiment of the invention and, together with the description, serve to explain the invention. In the drawings:
FIG. 1 is a perspective view of a connecting rod;
FIG. 2 is a schematic illustration of mass distribution of a connecting rod;
FIG. 3 is a schematic view of a mass distribution measurement of a connecting rod in an ideal case;
FIG. 4 is a schematic illustration of a connecting rod mass distribution measurement method in accordance with a preferred embodiment of the present application;
FIG. 5 is a schematic view of a position limiting unit in the horizontal direction of the connecting rod;
FIG. 6 is a side view of a connecting rod mass distribution measuring device in accordance with a preferred embodiment of the present application;
fig. 7 is a perspective view of the connecting rod mass distribution measuring device.
Detailed Description
The connecting rod is used as an important transmission part in an engine, and because the connecting rod can generate inertia force based on the self weight in the working process, the mass distribution condition of the large end and the small end of the connecting rod needs to be accurately controlled. The application provides a measuring method, a measuring system and a measuring device for mass distribution of a connecting rod big end and a connecting rod small end of an engine connecting rod, so as to realize measurement of mass distribution of the engine connecting rod.
The technical solutions of the present application will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.
The terms of orientation of "horizontal transverse direction X", "horizontal longitudinal direction Y" and "vertical direction Z" referred to in the present application are described in the directions shown in the drawings, wherein "vertical direction Z" denotes the direction of gravity. It should be understood that the above directional terms are described for clearly indicating the relative position relationship of the technical solutions of the present application, and the arrangement of the products carrying the technical solutions of the present application may not be limited to the directional relationships shown in the drawings of the present application, so the above directional terms do not limit the protection scope of the present application.
As shown in fig. 1, when the engine is running, the smaller end of the connecting rod makes a straight reciprocating motion along with the piston around the small hole axis C2 of the small end 12 of the connecting rod, and the larger end makes a revolving motion together with the connecting rod neck of the crankshaft around the large hole axis C1 of the large end 11 of the connecting rod. In view of this, according to the connecting rod mass distribution measuring method of the present application, as shown in fig. 2, the weight of the large end at the position of the large hole axis C1 of the connecting rod in the horizontal state is measured as P1, and the weight of the small end at the position of the small hole axis C2 is measured as P2, so as to determine whether the mass distribution condition of the large end 11 and the small end 12 of the connecting rod meets the working requirement.
Ideally, as shown in fig. 3, the connecting rod is horizontal, the left support structure is aligned with the center C1 of the large hole of the connecting rod, and the right force measuring structure is aligned with the center C2 of the small hole of the connecting rod. Assuming that the total weight of the connecting rod is P, the weight of a small head at the position of a small hole axis C2 of the connecting rod is P2, the first distance from a large hole axis C1 to the gravity center O is a, the supporting force measured by the force measuring structure is R2, and then the following equation is obtained:
P2＝R2；
P×a＝P2×I＝R2×I。
it can be understood that, in the case that the positions of the supporting structure and the force measuring structure are exchanged, if the weight of the large end at the large hole axis C1 of the connecting rod is P1, the second distance from the small hole axis C2 to the gravity center O is b, and the supporting force measured by the force measuring structure is R1, the following equation can also be obtained:
P1＝R1；
P×b＝P1×I＝R1×I。
in actual measurement, it is often difficult to achieve the ideal positioning effect due to the limitations of positioning accuracy and product surface shape. As shown in fig. 4, the distance between the axis C1 of the large hole and the first supporting position is a first difference Δ a, and is derived by combining the above equation under an ideal state:
r2 × L = P (a + Δ a) = P × a + P × Δ a = P2 × I + P × Δ a; further, it is found that:
the distance between the axis C2 of the small hole and the second support position may also be a second difference Δ b, and is derived by combining the equation relationship in the ideal state:
r1 × L = P (b + Δ b) = P × b + P × Δ b = P1 × I + P × Δ b; further, it is found that:
derived according to the formula, the application provides a connecting rod mass distribution measuring method which is used for measuring the large-head weight P1 at the large hole axis C1 and the small-head weight P2 at the small hole axis C2 of the connecting rod. Specifically, as shown in fig. 4, the measurement method includes the following main steps:
measuring the parameters of the connecting rod, measuring the total weight P of the connecting rod, and measuring the center distance I between the small hole axis C2 of the small connecting rod head 12 and the large hole axis C1 of the large connecting rod head 11 of the connecting rod.
Positioning the connecting rod so that the length direction of the connecting rod extends along the horizontal transverse direction X and the hole axes of the small connecting rod head 12 and the large connecting rod head 11 of the connecting rod extend along the vertical direction Z in a positioning state; along the horizontal transverse direction X, a first support location supported in the vertical direction Z on the big head 11 of the connecting rod and a second support location supported in the vertical direction Z on the small head 12 of the connecting rod are formed, respectively, and the distance between the first support location and the second support location is the measurement distance L.
After the above measurement preparation is completed, the measurement and calculation may be completed for either or both of the large head weight P1 and the small head weight P2. Specifically, by measuring the distance between the center C1 of the large hole and the first supporting position as a first difference Δ a in the horizontal transverse direction X, and measuring the first supporting force R1 applied by the first supporting position to the connecting rod large head 11, according to the formula
And calculating to obtain the small head weight P2 at the small hole axis C2 of the connecting rod. The distance between the axis C2 of the small hole and the second supporting position in the horizontal transverse direction X is measured to be a second difference value delta b, and a second supporting force R2 applied to the small head 12 of the connecting rod by the second supporting position is measured according to a formula
And calculating to obtain the big end weight P1 at the position of the big hole axis C1 of the connecting rod.
In practical application of the measuring method, after one of the large head weight P1 and the small head weight P2 is obtained, the other value can be obtained according to the total weight P = the large head weight P1+ the small head weight P2 of the connecting rod. Before calculation, it is necessary to determine whether the first support position is farther than the center C1 of the large hole in the horizontal lateral direction X with respect to the center O of gravity of the link and/or whether the second support position is farther than the center C2 of the small hole in the horizontal lateral direction X with respect to the center O of gravity of the link, thereby determining whether the first difference Δ a and/or the second difference Δ b are positive values. That is, according to the view shown in fig. 4, the first supporting position is located at the left side of the axis C1 of the large hole, the first difference Δ a is a positive value, and otherwise, the first difference Δ a is a negative value; and the second support position is located at the right side of the hole axis C2, the second difference value Delta b is a positive value, otherwise, the second difference value Delta b is a negative value.
According to the connecting rod mass distribution measuring method, in the measuring process, if the deviation of the posture of the connecting rod is larger than that of the connecting rod in the horizontal direction, a larger error occurs in the measuring result. Preferably, in the positioning process of the connecting rod, the height values of a plurality of points on the upper surface or the lower surface of the connecting rod in the vertical direction Z can be measured to judge whether the connecting rod is in a horizontal state. For example, two finished surfaces of the upper surface of the connecting rod are measured, and whether there is a large deviation between the difference in height values between the two finished surfaces and the standard deviation value is compared. Preferably, the length of the connecting rod is offset by an angle of not more than 2 degrees at most from the horizontal. On the other hand, in order to be suitable for connecting rods with different shapes or models, the height of at least one of the first supporting position and the second supporting position in the measuring method is preferably adjustable, so that the positioning posture of the connecting rod can be adjusted in real time in combination with the measurement of the horizontal state of the connecting rod.
In the horizontal transverse direction X, the first support position and the second support position may be respectively disposed at any position on both sides of the center of gravity of the connecting rod. However, since the position of the center of gravity of the connecting rod cannot be accurately determined, the first supporting position and the second supporting position should be separated from each other as far as possible to ensure that the center of gravity O of the connecting rod is located between the first supporting position and the second supporting position. Preferably, during the positioning of the connecting rod, the first support position is close to the axis C1 of the large hole, and/or the second support position is close to the axis C2 of the small hole. Wherein, when the distance between the first supporting position and the center C1 of the big hole is small enough, for example, the first difference Delta a is less than or equal to 2 μm,
or when the distance between the second supporting position and the axis C2 of the small hole is small enough, for example, the second difference Delta b is less than or equal to 2 μm
Therefore, according to the measurement method of the present application, it is preferable that the distance between the first support position and the large hole axis C1 of the connecting rod in the positioning state is less than or equal to 2 μm and/or the distance between the second support position and the small hole axis C2 of the connecting rod in the positioning state is less than or equal to 2 μm in the horizontal transverse direction X by accurately positioning the connecting rod on the horizontal plane, so that the measurement step can be simplified, and even without measuring a specific value of the first difference Δ a or the second difference Δ b, the large-head weight P1 and the small-head weight P2 of the connecting rod can be obtained.
According to the method for measuring the mass distribution of the large end and the small end of the connecting rod of the engine connecting rod, the application also provides a connecting rod mass distribution measuring device. As shown in fig. 6, the measuring apparatus includes a base 10 and a support mechanism 20. Wherein, the supporting mechanism 20 comprises a first supporting member 21 and a second supporting member 22 mounted on the base 10 along the horizontal transverse direction X, the first supporting member 21 and the second supporting member 22 are respectively used for forming point support (arc support, taper support or wedge support, etc.) for the connecting rod big end 11 and the connecting rod small end 12 of the connecting rod in the horizontal transverse direction X. At least one of the first support 21 and the second support 22 is provided with a force measuring unit 23, and the force measuring unit 23 is used for measuring a first support force R1 applied to the connecting rod big head 11 by the first support 21 and/or a second support force R2 applied to the connecting rod small head 12 by the second support 22.
In the above-mentioned supporting mechanism 20, the first supporting member 21 and the second supporting member 22 form the first supporting position and the second supporting position, respectively, when supporting the connecting rod. Since the position of the large hole axis C1 and the position of the small hole axis C2 of the connecting rod to be measured are both hole structures, in order to arrange the first support position or the second support position close to the large hole axis C1 or the small hole axis C2, the first support member 21 and/or the second support member 22 forming point support in the horizontal transverse direction X preferably extend linearly in the horizontal longitudinal direction Y, for example, a plate member having a top cross-sectional shape of a cone or an arc. The force-measuring cell 23 can be arranged on the first support 21 and/or on the second support 22, or also on the bottom of the first support 21 and/or of the second support 22. For example, the force measuring unit 23 may be a force sensor mounted to the first support 21 and/or the second support 22, or a force measuring scale carrying the first support 21 and/or the second support 22 at the bottom, preferably a precision electronic scale with a measurement error of not more than 0.01 g.
In order to be able to adapt to different shapes or models of connecting rods, the support height of at least one of the first support 21 and the second support 22 of the measuring device is preferably adjustable to enable the connecting rods of different surface shapes to be adjusted to a horizontally positioned state. For example, at least one of the first support 21 and the second support 22 may be mounted on the base 10 movably in the vertical direction Z, and a fastener capable of fixing the moving position of the at least one of the first support 21 and the second support may be provided, and the movable mounting may be realized by a threaded connection, a sliding connection or the like. On the other hand, the position of at least one of the first support 21 and the second support 22 of the measuring device in the horizontal transverse direction X is preferably adjustable according to the length of the different types of connecting rods. For example, the base 10 is provided with a plurality of mounting positions distributed along the horizontal transverse direction X for fixing the first support 21 and/or the second support 22, or preferably at least one of the first support 21 and the second support 22 is movably mounted (in a form of a slide rail, a guide rod, or the like) on the base 10 along the horizontal transverse direction X, so that the measurement distance L between the first support 21 and the second support 22 can be conveniently and flexibly adjusted.
The link mass distribution measuring device preferably further comprises a limiting mechanism 30 for constraining the horizontal position of the link. As shown in fig. 5, 6 and 7, the limiting mechanism 30 is mounted on the base 10, and the limiting mechanism 30 may include a transverse limiting unit 31 and/or a longitudinal limiting unit 32. The transverse limiting unit 31 is used for limiting the horizontal position of the connecting rod in the horizontal transverse direction X, and under the condition that the size parameters of the connecting rod are known, the limitation of the position of the connecting rod in the horizontal transverse direction X can facilitate the positioning of the large hole axis C1 or the small hole axis C2 of the connecting rod by the first supporting piece 21 or the second supporting piece 22, so that the measurement process is simplified. The longitudinal limiting unit 32 is used for limiting the horizontal position of the connecting rod in the horizontal longitudinal direction Y, so as to ensure that the length direction of the connecting rod is arranged along the horizontal transverse direction X as much as possible, and the auxiliary connecting rod is accurately supported on the first supporting part 21 and the second supporting part 22.
According to the above link mass distribution measuring device, the lateral limiting unit 31 preferably includes the limiting member 33 movable in the horizontal lateral direction X, and the limiting member 33 may be provided on both sides in the length direction of the link in the positioned state, or preferably, the limiting member 33 may be provided only on one side thereof. In order to visually observe whether the connecting rod is in place or not, the transverse limiting unit 31 preferably further comprises a displacement sensor 34 for measuring the moving position of the limiting member 33, the initial position of the limiting member 33 is set to be the zero position of the displacement sensor 34, and when the connecting rod is positioned, the micro displacement generated by the limiting member 33 when the connecting rod contacts the limiting member 33 can be instantly observed through the displacement sensor 34. On the other hand, the longitudinal limiting unit 32 may comprise a plurality of stops 35 of which the stop position is adjustable in the horizontal longitudinal direction Y. As shown in fig. 5 and 7, the plurality of stoppers 35 form limit stoppers on both sides in the link width direction to restrain the link from shifting in the horizontal longitudinal direction Y. In order to prevent the longitudinal position-limiting unit 32 from influencing the mass distribution measurement result of the connecting rod, there is a gap between the restraint region formed by the longitudinal position-limiting unit 32 and the connecting rod, i.e. in the positioned state, no force is generated between the plurality of stoppers 35 and the surface of the connecting rod. Preferably, a clearance of 0 to 1mm is present between the link surface in the positioned state and the arbitrary stopper 35.
Based on the connecting rod mass distribution measuring method and the measuring device thereof, the application also provides a connecting rod mass distribution measuring system, which comprises a three-coordinate measuring instrument and the connecting rod mass distribution measuring device. The connecting rod mass distribution measuring device is arranged in an effective measuring space range of a three-coordinate measuring instrument, and relative coordinates of components such as the first supporting piece 21, the second supporting piece 22, the limiting piece 33 and the stop piece 35 of the measuring device in the horizontal transverse direction X, the horizontal longitudinal direction Y and the vertical direction Z can be accurately measured through the three-coordinate measuring instrument, so that the position of each component can be accurately adjusted by the measuring device. On the other hand, the three-coordinate measuring instrument can also be used for measuring the size parameters and the positioning levelness of the connecting rod in a positioning state in real time. According to the connecting rod mass distribution measuring system, the connecting rod mass distribution measuring method can be used for realizing an efficient and reliable measuring scheme for the mass distribution condition of the engine connecting rod.
The preferred embodiments of the present application have been described above in detail, however, the present application is not limited to the details of the above embodiments, and various simple modifications may be made to the technical solution of the present application within the technical idea of the present application, and these simple modifications all belong to the protection scope of the present application.
It should be noted that, in the foregoing embodiments, various features described in the above embodiments may be combined in any suitable manner, and in order to avoid unnecessary repetition, various possible combinations are not described in the present application.
In addition, any combination of the various embodiments of the present application can be made, and the same should be considered as the disclosure of the present invention as long as the idea of the present application is not violated.
Claims (4)
1. The connecting rod mass distribution measuring system comprises a three-coordinate measuring instrument and a connecting rod mass distribution measuring device, wherein the connecting rod mass distribution measuring device is arranged in an effective measuring space range of the three-coordinate measuring instrument;
knowing the total weight P of the connecting rod, the connecting rod mass distribution measurement system is used for measuring the large head weight P1 at the large hole axis C1 and the small head weight P2 at the small hole axis C2 of the connecting rod;
characterized in that the connecting rod mass distribution measuring device comprises:
a base (10); and
the supporting mechanism (20) comprises a first supporting piece (21) and a second supporting piece (22) which are installed on the base (10) along a horizontal transverse direction X, the first supporting piece (21) and the second supporting piece (22) are respectively used for forming point support on a large connecting rod head (11) and a small connecting rod head (12) of the connecting rod in the horizontal transverse direction X, so that the length direction of the connecting rod extends along the horizontal transverse direction X, the hole axes of the small connecting rod head (12) and the large connecting rod head (11) of the connecting rod extend along a vertical direction Z, and the distance between the point supports of the first supporting piece (21) and the second supporting piece (22) is a measuring distance L;
at least one of the first support (21) and the second support (22) is provided with a force measuring unit (23), the force measuring unit (23) is used for measuring a first support force R1 applied to the big connecting rod head (11) by the first support (21) and/or a second support force R2 applied to the small connecting rod head (12) by the second support (22);
the three-coordinate measuring machine is used for measuring with the connecting rod supported on the supporting mechanism (20): the center distance I between the small hole axis C2 of the connecting rod small head (12) of the connecting rod and the large hole axis C1 of the connecting rod large head (11); in the horizontal transverse direction X, the distance between the large hole axis C1 and the first support position is a first difference value delta a, and/or the distance between the small hole axis C2 and the second support position is a second difference value delta b;
according to the formula
Calculating the weight P2 of the small end at the axis C2 of the small hole of the connecting rod, and/or according to a formula
Calculating to obtain the connecting rodThe big end weight P1 at the axle center C1 of the big hole.
2. The connecting rod mass distribution measuring system of claim 1, wherein a support height of at least one of the first support (21) and the second support (22) is adjustable.
3. The connecting rod mass distribution measuring system of claim 1, wherein the connecting rod mass distribution measuring device comprises a limiting mechanism (30), the limiting mechanism (30) being mounted on the base (10), the limiting mechanism (30) comprising:
a transverse limiting unit (31), the transverse limiting unit (31) being used for limiting the horizontal position of the connecting rod in the horizontal transverse direction X; and/or a longitudinal stop unit (32), the longitudinal stop unit (32) being configured to define a horizontal position of the connecting rod in a horizontal longitudinal direction Y.
4. A connecting rod mass distribution measuring system according to claim 3, characterized in that the lateral limiting unit (31) comprises a limiting member (33) movable in a horizontal lateral direction X, and a displacement sensor (34) for measuring a moving position of the limiting member (33); and/or the longitudinal limiting unit (32) comprises a plurality of stop members (35) with adjustable stop positions in the horizontal longitudinal direction Y.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210976390.0A CN115507786A (en) | 2022-04-27 | 2022-04-27 | Connecting rod mass distribution measuring system |
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| CN202210451886.6A CN114562969B (en) | 2022-04-27 | 2022-04-27 | Connecting rod mass distribution measuring method, measuring system and measuring device thereof |
| CN202210976390.0A CN115507786A (en) | 2022-04-27 | 2022-04-27 | Connecting rod mass distribution measuring system |
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| CN114562969A (en) | 2022-05-31 |
| CN114562969B (en) | 2022-07-19 |
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