CN210070787U - A crankshaft runout detection device and a coaxiality detection assembly - Google Patents

Abstract

The utility model discloses a crankshaft runout detection device. The beating of the measured position is transmitted to the transmission mechanism on the side head of the first measuring table on the periphery of the crankshaft. The crankshaft beating detection device can detect the beating of the crankshaft journal in a small surrounding space, which is beneficial to control the quality of the crankshaft finished product. The utility model also discloses a crankshaft journal coaxiality detection component. The crankshaft runout detection device and the end journal runout detection device respectively detect the circular runout of the middle journal and the end journal, and calculate the real-time difference between the two circular runouts. value, the coaxiality of the two measured journals can be obtained.

Description

A crankshaft runout detection device and a coaxiality detection assembly

technical field

The utility model relates to the position degree detection of components, in particular to a crankshaft runout detection device and a coaxial degree detection component.

Background technique

The crankshaft is the most important part in the engine. The machining accuracy of each journal in the crankshaft directly affects the operation of the engine. If the accuracy is low, the engine will shake in light, and the running noise will be large, and the crankshaft bearing bush will be held and pulled. and other serious quality problems, so it is necessary to conduct runout detection on the crankshaft to prevent unqualified products from entering the next process.

At present, the detection device used for crankshaft runout detection is a dial indicator or a dial indicator. First, the journals at both ends of the crankshaft are installed on the support seat, so that the crankshaft can rotate along the support seat, and then directly connect the dial indicator or dial indicator. The pointer is pressed against the surfaces of the journals at both ends to measure the runout value. However, because the journals in the crankshaft not only include journals at both ends of the crankshaft, but also have multiple journals in the middle of the crankshaft, and the journals in the middle are often due to the narrow space around them, and their circular jumps and the ends on both sides of the journals The runout cannot be detected, resulting in uncontrollable quality of the finished crankshaft.

SUMMARY OF THE INVENTION

The main purpose of the utility model is to provide a crankshaft runout detection device and a coaxiality detection assembly, which can detect the runout and coaxiality of a crankshaft journal with a small surrounding space and control the quality of the finished crankshaft.

For realizing the above-mentioned purpose and other relevant purposes, the technical scheme of the present utility model is as follows:

A crankshaft runout detection device, wherein the crankshaft is rotatably mounted on a support base, and the crankshaft runout detection device comprises:

a mounting seat, which is used for installing the crankshaft runout detection device on the side of the crankshaft,

a first measurement table, the first measurement table is a dial indicator or a dial indicator, and the shown first measurement table is arranged on the mounting seat;

and a transmission mechanism, the transmission mechanism is provided with a beating input part and a beating output part, the beating input part is always pressed at the measured position under the action of elastic force, and the measuring head of the first measuring table is pressed against the beating an output part, the transmission mechanism is used for transmitting the displacement generated by the beating input part when the crankshaft rotates to the beating output part according to a designed ratio.

Optionally, the transmission mechanism includes at least one stage of sub-transmission mechanisms, and each stage of the sub-transmission mechanism includes:

The sub-transmission mechanism includes:

a rotating shaft, which is arranged on the mounting seat;

a rotating member, which is rotatably mounted on the rotating shaft, and is provided with a first contact portion for inputting rotational torque and a second contact portion for outputting rotational torque,

and a spring, the spring is used to automatically balance the resultant moment generated by the first and second force parts on the rotating member, one end of the spring is arranged on the mounting seat, and the The other end is arranged on the rotating member;

When a first-stage sub-transmission mechanism is included, the beating input portion is the first stress portion of the sub-transmission mechanism, and the beating output portion is the second stress portion of the sub-transmission mechanism; when two sub-transmission mechanisms are included When the sub-transmission mechanism is above one level, in the adjacent two sub-transmission mechanisms, the second contact point on the sub-transmission mechanism of the previous level is pressed against the first contact force of the sub-transmission mechanism of the subsequent level. In terms of parts, the beating input part is the first stressing part of the sub-transmission mechanism of the first stage, and the beating output part is the second stressing part of the sub-transmission mechanism of the last stage.

Optionally, the transmission mechanism includes a first-stage sub-transmission mechanism and a second-stage sub-transmission mechanism, the first-stage sub-transmission mechanism is used to transmit the displacement generated by the beating input part in a direction away from the crankshaft, and the first-stage sub-transmission mechanism The secondary sub-transmission mechanism is used to make the beating output direction face the direction where the measuring head of the first measuring table is located, and the front side of the first measuring table faces upwards.

Optionally, in the first-stage sub-transmission mechanism, the corresponding rotating member is a balance lever, the balance lever uses the corresponding rotating shaft as a rotation fulcrum, and one end of the balance lever is located at the measured journal. Or in the measurement space around the measured end face, and the beating input part of the balance lever is located below the position of the corresponding journal, and the other end of the balance lever corresponds to the second stage sub-transmission mechanism. A focus part abuts against each other.

Optionally, an input pressure head is provided at the beating input portion of the balance lever, a transition pressure head is provided at the second force portion of the balance lever, and the materials of the input pressure head and the transition pressure head are hard. quality alloy.

Optionally, in the first-stage sub-transmission mechanism, the rotating fulcrum is located in an area of the mounting seat close to the support seat, the spring is a tension spring, and the balance lever is provided with a The tension arm of the tension arm of the tension spring, the tension arm is perpendicular to the balance lever, and the tension arm and the rotation fulcrum are collinear, one end of the tension spring is installed on the tension arm, the tension arm is The other end of the spring is mounted on the mount.

Optionally, in the second-stage sub-transmission mechanism, the rotating member includes a central rotating portion, an input plate disposed on the central rotating portion, and an output plate disposed on the central rotating portion. An angle is formed between the input plate and the output plate, the corresponding second force portion on the balance lever abuts on one side of the input plate, and the measuring head of the first measuring table abuts on the output the side of the plate away from the crankshaft.

Optionally, in the second-stage sub-transmission mechanism, the spring is a tension spring, one end of the tension spring is set on the mounting seat, and the other end is connected to the input plate, so that the input plate is pressed against the mounting seat. on the corresponding second stress position of the first-stage sub-transmission mechanism.

Optionally, the mounting seat includes a first mounting portion for mounting the crankshaft runout device on the side surface of the support seat, a second mounting portion for mounting the transmission mechanism, and a second mounting portion for mounting the first mounting portion. A third installation part of a measuring meter, the first installation part, the second installation part and the third installation part are connected in sequence, and the first installation part, the second installation part and the third installation part are formed with a middle part which is easy to disassemble The avoidance space for installing the mounting seat.

The utility model also provides a crankshaft journal coaxiality detection assembly, comprising an end journal runout detection device for detecting the runout of any journal at both ends of the crankshaft and any of the above crankshaft runout detection devices, the The input part of the crankshaft runout detection device abuts against the measured journal during measurement.

The crankshaft runout detection device of the utility model uses the transmission mechanism to transmit the runout of the measured position when the crankshaft rotates to the side head of the first measuring table on the periphery of the crankshaft, which can detect the runout of the crankshaft journal in the narrow surrounding space, which is beneficial to control the crankshaft. Finished quality. The crankshaft journal coaxiality detection assembly of the utility model detects the circular runout of the intermediate journal and the end journal respectively through the crankshaft runout detection device and the end journal runout detection device, and can obtain the real-time difference by calculating the real-time difference between the two circular runouts. The coaxiality of the two measured journals.

Description of drawings

Fig. 1 shows the use state diagram of the crankshaft runout detection device of the present invention;

Fig. 2 shows the schematic diagram of the distribution of the first force position and the second force position of each sub-transmission mechanism in the crankshaft runout detection device of the present invention;

Fig. 3 shows the use state diagram of the crankshaft journal coaxiality detection assembly of the present invention;

FIG. 4 is a left side view of the middle-end journal runout detection device of FIG. 3 .

Description of reference numerals in the examples:

Crankshaft A, support seat B, support roller B1;

Mounting seat 1, first measuring table 2, transmission mechanism 3;

a first installation part 11, a second installation part 12, a third installation part 13, and an escape space 14;

Measuring head 21;

The beating input part 301a, the beating output part 301b, the first stress part 301, the second stress part 302;

The first-stage sub-transmission mechanism 31, the second-stage sub-transmission mechanism 32, the balance lever 311, the first rotating shaft 312, the first tension spring 313, the input pressure head 314, the transition pressure head 315, the tension arm 316, the second rotating member 321 , the second rotating shaft 322, the second tension spring 323, the central rotating part 321a, the input plate 321b, and the output plate 321c;

The end journal runout detection device 400, the bracket 410, the second measuring table 420, the opening 410a, the first clamping arm 411, the second clamping arm 412, and the limiting hole 410b.

Detailed ways

In the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art that the present invention may be practiced without one or more of these details. In other instances, some technical features known in the art are not described in order to avoid confusion with the present invention.

It should be understood that the present invention may be embodied in different forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided so that this disclosure will be thorough and complete, and will fully convey the scope of the invention to those skilled in the art. In the drawings, the same reference numerals refer to the same components throughout.

This embodiment discloses a crankshaft runout detection device. Referring to FIG. 1 and FIG. 2 in combination, the crankshaft A is rotatably mounted on the support base B, and the crankshaft runout detection device includes:

A mounting seat 1, which is used to install the crankshaft runout detection device on the side of the crankshaft A,

The first measurement table 2, the first measurement table 2 is a dial indicator or a dial indicator, and the first measurement table 2 is arranged on the mounting seat 1;

And the transmission mechanism 3, the transmission mechanism 3 is provided with a beating input part 301a and a beating output part 301b, the beating input part 301a is always pressed at the measured position under the action of elastic force, the measuring head of the first measuring table 2 21 abuts against the beating output portion 301b, and the transmission mechanism is used to transmit the displacement generated by the beating input portion 301a when the crankshaft A rotates to the beating output portion 301b in a designed proportion.

During detection, install the crankshaft A on the support base B, so that the crankshaft A can rotate on the support base B, and install the entire crankshaft runout detection device on the side of the crankshaft A through the installation base 1, so that the runout of the transmission mechanism is input. The measuring part 301a extends into the space around the measured position, the beating input part 301a is pressed on the measured position, the measuring head 21 of the first measuring table 2 is pressed against the beating output part 301b, the crankshaft A is rotated, and the reading of the first measuring table 2 is read. , the actual runout of the measured position is equal to the change value of the first measurement table 2 divided by the design ratio.

Wherein, the design ratio is determined according to the specific structural dimensions of the transmission mechanism.

Among them, the support base B can adopt the following solutions: the support base B includes two sub-support bases, and each sub-support base includes a support base body and at least two rotatable support rollers B1 arranged on the support base body. The support rollers B1 are distributed On both sides of the crankshaft end journal, the journals at each end of the crankshaft A to be tested are supported by the rollers on the corresponding sides. In this way, only the journals at both ends of the crankshaft A under test are directly placed on the corresponding support rollers B1, and the crankshaft A under test can rotate under the action of external force. Of course, in the actual implementation process, the support seat B also A form similar to the bearing seat can be used, which can make the crankshaft A rotate on the support seat B.

In addition, the measured position may be the journal of the crankshaft A, or may be the end faces on both sides of the journal of the crankshaft A.

In some embodiments, referring to FIG. 1 and FIG. 2 in combination, the transmission mechanism 3 includes at least one sub-transmission mechanism, and the sub-transmission mechanism includes:

a rotating shaft, which is arranged on the mounting seat 1;

The rotating member is rotatably mounted on the rotating shaft, and the rotating member is provided with a first stressing part 301 for inputting a torque and a second stressing part 302 for outputting a torque;

and a spring, the spring is used to automatically balance the resultant moment generated by the first force part 301 and the second force part 302 on the rotating member, one end of the spring is set on the mounting seat 1, so The other end of the spring is arranged on the rotating member;

Here, the transmission mechanism includes two or more stages of sub-transmission mechanisms. In two adjacent sub-transmission mechanisms, the second force portion 302 on the sub-transmission mechanism of the previous stage is pressed against the latter stage. On the first exertion part 301 of the sub-transmission mechanism, the beating input part 301a is the first exertion part 301 of the first-stage sub-transmission mechanism, and the beating output part 301b is the last stage. The second force portion 302 of the sub-transmission mechanism.

In the actual implementation process, the transmission mechanism may also only include a first-stage sub-transmission mechanism. Correspondingly, the beating input portion is the first force portion of the sub-transmission mechanism, and the beating output portion is the sub-transmission mechanism. the second stress part of the transmission mechanism.

The shape of the rotating parts of the sub-transmission mechanisms of each stage can be cylindrical, plate-shaped, rod-shaped or other shapes, and the rotating parts of the first-stage sub-transmission mechanism 31 can also be disc-shaped, plate-shaped, rod-shaped or other shapes. shape, as long as it can protrude into the space around the measured location.

And the design ratio i=i ₁ i ₂ ... i _n , wherein, i ₁ represents the transmission ratio of the first-stage sub-transmission mechanism 31 , i _n represents the transmission ratio of the last-stage sub-transmission mechanism, and the subscript n represents the corresponding transmission stage number, that is, the design ratio is equal to the product of the transmission ratios of each stage, and the transmission ratio of each stage i _n =L _nsc /L _nsr , where L _nsc represents the distance from the second force point 302 in the n-th stage sub-transmission mechanism to the corresponding rotating shaft The lever arm, L _nsr represents the lever arm from the first force-applying part 301 to the corresponding rotating shaft in the n-th stage sub-transmission mechanism.

In some embodiments, the transmission ratio of each sub-transmission mechanism is equal to 1, and the change value of the first measurement table 2 is the runout value of the position of the passive side, and no conversion is required.

In some embodiments, referring to FIG. 1 and FIG. 2 in combination, the transmission mechanism 3 includes a first-stage sub-transmission mechanism 31 and a second-stage sub-transmission mechanism 32 , and the first-stage sub-transmission mechanism 31 is used to input the beating The displacement generated by the part 301a is transmitted to the direction away from the crankshaft A, and the second stage sub-transmission mechanism 32 is used to make the beating output direction toward the direction where the measuring head 21 of the first measuring table 2 is located. 2 face up. In order to facilitate the installation of crankshaft A before testing, the height of the support base B is usually much lower than the height of the human eye when standing. When the front of the first measurement table 2 is facing upwards, the inspector only needs to lower his head to read the first measurement. The reading of Table 2 is easy to operate on the one hand, and on the other hand, it is convenient for the operator to look at the first measurement table 2 after lowering his head, which is conducive to a more accurate reading.

In the following embodiments, for ease of understanding, the rotating member and the rotating shaft in the first-stage sub-transmission mechanism are referred to as the first rotating member and the first rotating shaft 312 respectively, and the rotating member and the rotating shaft in the second-stage sub-transmission mechanism 32 are respectively referred to as the first rotating member and the first rotating shaft 312 . It is called the second rotating member 321 and the second rotating shaft 322 .

In some embodiments, referring to FIG. 1 and FIG. 2 in combination, in the first-stage sub-transmission mechanism 31 , the first rotating member is a balance lever 311 , and the balance lever 311 uses the corresponding first rotating shaft 312 as a Rotating the fulcrum, one end of the balance lever 311 is located in the measurement space around the measured journal or the measured end face, and the beating input portion 301a of the balance lever 311 is located below the corresponding journal position, the balance lever The other end of 311 abuts against the first force-applying portion 301 corresponding to the second-stage sub-transmission mechanism 32 . The balance lever 311 here refers not only to the rod-shaped balance lever 311, but also to a plate-shaped or other shape. The space is detected, and the beating input portion 301a is located below the position of the corresponding journal, and during the detection process, the balance lever 311 will not block the inspection personnel from viewing the crankshaft.

In some embodiments, referring to FIGS. 1 and 2 in combination, an input pressure head 314 is provided at the beating input portion 301a of the balance lever 311 , and a transition pressure head is provided at the second force portion of the balance lever 311 315, the input indenter 314 and the transition indenter 315 are made of cemented carbide. The wear resistance of the contact part is enhanced, and the life of the entire detection device is improved.

In some embodiments, referring to FIGS. 1 and 2 , the input pressure head 314 is detachably mounted on the balance lever 311 through screws, and can be quickly replaced after wear.

In some implementations, referring to FIG. 1 , in the first-stage sub-transmission mechanism 31 , the rotation fulcrum (the center of the first rotation shaft 312 ) is located in the area of the mounting base 1 close to the support base B. During the process, the larger the transmission ratio of the sub-transmission mechanisms at all levels, the greater the reading transformation of the first measurement table 2, and the easier it is for the inspector to read the change value of the first measurement table 2. The transmission ratios are all less than one, and the reading transformation of the first measuring table 2 may not be quickly recognized by the naked eye, and the rotation fulcrum of the first-stage sub-transmission mechanism 31 is set in the area close to the support base B, which is beneficial to shorten the input force arm, Thus, the transmission ratio of the first-stage sub-transmission mechanism 31 is increased.

In some embodiments, referring to FIG. 1 , the spring is a first tension spring 313 , the balance lever 311 is provided with a tension arm 316 for increasing the force arm of the first tension spring 313 , the tension arm 316 Perpendicular to the balance lever 311, and the tension arm 316 is collinear with the pivot point, one end of the first tension spring 313 is installed on the tension arm 316, and the other end of the first tension spring 313 is installed on the mount 1. When the pivot point of the first stage sub-transmission mechanism 31 is set in the area close to the support seat B, the first tension spring 313 can only be installed on the side where the mounting seat 1 is located (otherwise the first tension spring 313 may interfere with the crankshaft A ), if you want to balance the lever 311, you need to apply enough balance tension to the balance lever, and setting the tension arm 316 can not only install the first tension spring 313 on the side where the mounting seat 1 is located, but also increase the first tension The force arm of the spring 313 is beneficial to reduce the size of the first tension spring 313 . Of course, in the actual implementation process, in the first-stage sub-transmission mechanism 31, the spring can also be a compression spring, but compared with the compression spring, the installation structure when the tension spring is adopted is simpler.

In some embodiments, referring to FIG. 1 , the axis of the first tension spring 313 of the first stage sub-transmission mechanism 31 is flush with the balance lever 311 , at this time, the tension arm 316 of the first tension spring 313 is almost vertical, A larger elastic moment can be provided, which is beneficial to ensure the balance of the entire balance lever 311 .

In some embodiments, referring to FIGS. 1 and 2 , in the second-stage sub-transmission mechanism 32 , the second rotating member 321 includes a central rotating portion 321 a and an input plate disposed on the central rotating portion 321 a 321b and the output plate 321c disposed on the central rotating part 321a, the input plate 321b and the output plate 321c form an angle β, and the corresponding second force part 302 on the balance lever 311 abuts against On one side of the input plate 321b, the measuring head 21 of the first measuring meter 2 abuts on the side of the output plate 321c away from the crankshaft A. Since the second rotating member 321 has a certain moment of inertia during the detection process, the second rotating member 321 with this structure is used in the second stage sub-transmission mechanism 32, the second rotating member 321 has a light weight and a small moment of inertia. , which is conducive to more accurate detection of the beating value of the measured position.

In some embodiments, referring to FIG. 1 and FIG. 2 in combination, in the second-stage sub-transmission mechanism 32, the corresponding spring is also a second tension spring 323, and one end of the second tension spring 323 is provided at the On the mounting base 1 , the other end is connected to the input plate 321 b , so that the input plate 321 b is pressed against the corresponding second force portion 302 of the first-stage sub-transmission mechanism 31 .

In some embodiments, referring to FIG. 1 , the mounting seat 1 includes a first mounting portion 11 for mounting the crankshaft runout device on the side of the support seat B, and a first mounting portion 11 for mounting the transmission mechanism 3 . Two mounting portions 12 and a third mounting portion 13 for mounting the first measuring meter 2 , the first mounting portion 11 is connected to the second mounting portion 12 and the third mounting portion 13 in sequence, and the first mounting portion 11 is connected to the second mounting portion 12 and the third mounting portion 13 in sequence. Between the part 11 , the second installation part 12 , and the third installation part 13 , an escape space 14 is formed to facilitate the installation and removal of the installation seat.

In some embodiments, the first installation portion 11 and the support base B are connected by bolts, and the avoidance space is used to avoid the bolts during disassembly.

In some embodiments, the input plate 321b is a horizontal horizontal plate, the output plate 321c is a vertical plate, and the input plate 321b is located below the second rotating shaft 322, so that the third mounting portion 13 and the first mounting portion 13 are installed The parts 11 are located on both sides of the avoidance space 14, respectively.

In some embodiments, the third mounting portion 13 is provided with a head limiting hole 410b, which is conducive to more accurate measurement of the beating of the measured position.

The present invention also provides a crankshaft journal coaxiality detection assembly, referring to FIG. 3 , comprising an end journal runout detection device 400 for detecting the runout of any journal at both ends of the crankshaft A, and any of the above crankshafts In the runout detection device, the input part of the crankshaft runout detection device abuts against the measured journal during measurement. During rotation, the crankshaft A is rotated, and the circular runout of the intermediate journal and the end journal are respectively detected by the crankshaft runout detection device and the end journal runout detection device 400. By calculating the real-time difference between the two circular runouts, the two measured journals can be obtained. of coaxiality.

In some embodiments, with reference to FIGS. 3 and 4 , the end journal runout detection device 400 includes a bracket 410 and a second measurement meter 420 , and the bracket 410 is provided with an opening for inserting the head of the second measurement meter 420 410a, a first clamping arm 411 and a second clamping arm 412 are formed on both sides of the opening 410a. In the limiting structure of the second measuring meter 420 of the meter head, a closing bolt for closing the opening 410a is detachably provided between the first clamping arm 411 and the second clamping arm 412 . The bracket 410 is provided with a fastening bolt for installing the end journal runout detection device 400 . During detection, the measuring head 21 of the second measuring table 420 abuts against the journal of the end to be measured, and the end journal runout detection device has a simple structure, reliable installation, convenient installation and disassembly, and is not easily damaged.

In some embodiments, referring to FIGS. 3 and 4 , the limiting structure is a limiting hole 410b surrounded by two semi-circular arc surfaces, and the two semi-circular arc surfaces are respectively disposed on the first clamping arm 411 The side facing the opening 410a and the side of the second clamping arm 412 facing the opening 410a.

In the actual implementation process, the end journal runout detection device may also adopt a detection device with the same structure as the crankshaft runout detection device described above.

In the description of the present invention, unless otherwise expressly specified and limited, the first feature "on" or "under" the second feature may include the direct contact between the first and second features, or may include the first and second features. The two features are not in direct contact but through another feature between them.

In describing the present invention, the singular forms "a", "an" and "the/the" are intended to include the plural forms as well, unless the context clearly dictates otherwise. It will also be understood that the terms "compose" and/or "include", when used in this specification, identify the presence of stated features, integers, steps, operations, components and/or parts, but do not exclude one or more other The presence or addition of features, integers, steps, operations, components, parts and/or groups.

The above-mentioned embodiments merely illustrate the principles and effects of the present invention, but are not intended to limit the present invention. Anyone skilled in the art can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical idea disclosed by the present invention should still be covered by the claims of the present invention.

Claims (10)

1. a crankshaft beating detection device, the crankshaft is rotatably installed on the support base, it is characterized in that, comprising: a mounting seat, which is used for installing the crankshaft runout detection device on the side of the crankshaft, a first measurement table, the first measurement table is a dial indicator or a dial indicator, and the shown first measurement table is arranged on the mounting seat; and a transmission mechanism, the transmission mechanism is provided with a beating input part and a beating output part, the beating input part is always pressed at the measured position under the action of elastic force, and the measuring head of the first measuring table is pressed against the beating The output part, the transmission mechanism is used for transmitting the displacement generated by the beating input part when the crankshaft rotates to the beating output part according to the designed proportion. 2. The crankshaft runout detection device according to claim 1, wherein the transmission mechanism comprises at least one sub-transmission mechanism, and the sub-transmission mechanism comprises: a rotating shaft, which is arranged on the mounting seat; a rotating member, which is rotatably mounted on the rotating shaft, and is provided with a first contact portion for inputting rotational torque and a second contact portion for outputting rotational torque, and a spring, the spring is used to automatically balance the resultant moment generated by the first and second force parts on the rotating member, one end of the spring is arranged on the mounting seat, and the The other end is arranged on the rotating member; When a first-stage sub-transmission mechanism is included, the beating input portion is the first stress portion of the sub-transmission mechanism, and the beating output portion is the second stress portion of the sub-transmission mechanism; when two sub-transmission mechanisms are included When the sub-transmission mechanism is above one level, in the adjacent two sub-transmission mechanisms, the second contact point on the sub-transmission mechanism of the previous level is pressed against the first contact force of the sub-transmission mechanism of the subsequent level. In terms of parts, the beating input part is the first stressing part of the sub-transmission mechanism of the first stage, and the beating output part is the second stressing part of the sub-transmission mechanism of the last stage. 3 . The crankshaft runout detection device according to claim 2 , wherein the transmission mechanism comprises a first-stage sub-transmission mechanism and a second-stage sub-transmission mechanism, and the first-stage sub-transmission mechanism is used to input the runout. 4 . The displacement generated by the part is transmitted to the direction away from the crankshaft, and the second-stage sub-transmission mechanism is used to make the beating output direction toward the direction where the measuring head of the first measuring table is located, and the front side of the first measuring table faces upwards. 4 . The crankshaft runout detection device according to claim 3 , wherein in the first-stage sub-transmission mechanism, the corresponding rotating member is a balance lever, and the balance lever takes the corresponding rotating shaft as the balance lever. 5 . Turn the fulcrum, one end of the balance lever is located in the measurement space around the measured journal or the measured end face, and the beating input part of the balance lever is located below the corresponding journal position, and the other end of the balance lever The first force-applying parts corresponding to the second-stage sub-transmission mechanism abut against each other. 5 . The crankshaft runout detection device according to claim 4 , wherein the runout input portion of the balance lever is provided with an input pressure head, and the second force portion of the balance lever is provided with a transition pressure head. 6 . , the material of the input indenter and the transition indenter is cemented carbide. 6 . The crankshaft runout detection device according to claim 4 , wherein in the first-stage sub-transmission mechanism, the rotation fulcrum is located in an area of the mounting seat close to the support seat, and the spring It is a tension spring, the balance lever is provided with a tension arm for increasing the tension arm of the tension spring, the tension arm is perpendicular to the balance lever, and the tension arm is collinear with the rotation fulcrum, the One end of the tension spring is mounted on the tension arm, and the other end of the tension spring is mounted on the mounting seat. 7 . The crankshaft runout detection device according to claim 4 , wherein in the second-stage sub-transmission mechanism, the rotating member comprises a central rotating part, an input plate arranged on the central rotating part, and a an output plate arranged on the central rotating part, an angle is formed between the input plate and the output plate, and the corresponding second force portion on the balance lever abuts on one side of the input plate, The measuring head of the first measuring table abuts on the side of the output plate away from the crankshaft. 8 . The crankshaft runout detection device according to claim 7 , wherein in the second-stage sub-transmission mechanism, the spring is a tension spring, one end of the tension spring is arranged on the mounting seat, and the other end is arranged on the mounting seat. 9 . It is connected with the input plate, so that the input plate is pressed on the corresponding second stressing part of the first-stage sub-transmission mechanism. 9 . The crankshaft runout detection device according to claim 3 , wherein the installation seat comprises a first installation portion for installing the crankshaft runout device on the side surface of the support seat, for installing the crankshaft runout device. The second mounting portion of the transmission mechanism and the third mounting portion for mounting the first measuring meter, the first mounting portion, the second mounting portion and the third mounting portion are connected in sequence, and the first mounting portion, Between the second mounting portion and the third mounting portion, an escape space is formed to facilitate the mounting and dismounting of the mounting seat. 10. A crankshaft journal coaxiality detection assembly, characterized in that it comprises an end journal runout detection device for detecting the runout of any journal at both ends of the crankshaft and the crankshaft according to any one of claims 1 to 9 In the runout detection device, the input part of the crankshaft runout detection device abuts against the measured journal during measurement.

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