CN114199555A

CN114199555A - Top dead center testing equipment and testing method thereof

Info

Publication number: CN114199555A
Application number: CN202210027180.7A
Authority: CN
Inventors: 谭迎涛; 王笃文
Original assignee: Guangzhou New Century Electric Technique Co ltd
Current assignee: Guangzhou New Century Electric Technique Co ltd
Priority date: 2022-01-11
Filing date: 2022-01-11
Publication date: 2022-03-18

Abstract

The invention provides top dead center testing equipment and a testing method thereof, wherein the equipment comprises a conveying belt, a material tray, a testing support, a testing lifting platform, a top dead center measuring mechanism, a crankcase pressing mechanism and a rotor rotating mechanism; the rotor rotating mechanism is arranged right below the conveying belt, and the crankcase pressing mechanism is arranged right above the rotor rotating mechanism; the upper stop point measuring mechanism comprises a testing telescopic driving piece and a testing component, and the testing component comprises a testing shell, a measuring head mandrel, a return spring and a displacement sensor; the measuring head core shaft can touch the detection end of the displacement sensor in sliding motion; according to the invention, the rotor is grasped by the rotor rotating mechanism and rotates, the rotor drives the piston to move, the height of the piston moving to the top dead center is detected by utilizing the displacement sensor and the measuring head mandrel, the detection accuracy is high, the whole process is automatically controlled, the labor cost is reduced, and the working efficiency is high.

Description

Top dead center testing equipment and testing method thereof

Technical Field

The invention relates to the technical field of compressor detection, in particular to top dead center testing equipment and a testing method thereof.

Background

The compressor is the heart of a refrigeration device such as a refrigerator and an air conditioner. In recent years, our country is shifting from a large country of manufacture of products such as refrigerators and air conditioners to a strong country of manufacture. The design and scale of the compressor plays a key role for the development of the field, and the advanced manufacturing automation assembly and test production equipment technology in the scale manufacturing is an important factor for promoting the structure transformation. The piston of compressor is when the motion, the top dead center of piston can surpass the case face of crankcase, if the case face direct mount cylinder cap at the crankcase, will lead to piston striking cylinder cap, not only produce the noise, but also can lead to the structure not hard up, the scheduling problem that breaks of cylinder cap takes place, consequently, need place the gasket of accurate thickness and come the cooperation top dead center and surpass the distance of crankcase, just can guarantee the stability of compressor function and do not have a no abnormal sound, the test method of top dead center is simple at present, need professional to participate in the detection, the cost of labor is high, and the precision that detects is lower, work efficiency is low.

Disclosure of Invention

In view of the above defects, the present invention provides an upper dead point testing apparatus and a testing method thereof, which solve the problems of low upper dead point detection precision, high labor cost and low working efficiency in the prior art.

In order to achieve the purpose, the invention adopts the following technical scheme:

an upper stop test device comprises a conveying belt, a material tray, a test support, a test lifting platform, an upper stop measuring mechanism, a crankcase pressing mechanism and a rotor rotating mechanism;

the material tray is slidably arranged on the conveying belt, and the conveying belt is arranged above the test support;

the rotor rotating mechanism is arranged on the test support and is positioned right below the conveying belt;

the crankcase pressing mechanism is arranged above the conveying belt and is positioned right above the rotor rotating mechanism;

the test lifting platform is arranged on the test support and is positioned on one side of the rotor rotating mechanism;

the upper stop point measuring mechanism comprises a testing telescopic driving piece and a testing assembly, the testing assembly is slidably arranged on the testing lifting platform, and the telescopic driving piece drives the testing assembly to be close to or far away from the conveying belt;

the test assembly comprises a test shell, a probe mandrel, a return spring and a displacement sensor; the measuring head core shaft is slidably arranged at the front end of the testing shell, the displacement sensor is arranged in the testing shell, and the measuring head core shaft can touch the detection end of the displacement sensor in sliding motion;

the reset spring is arranged between the measuring head core shaft and the displacement sensor, and the measuring head core shaft has a trend of being far away from the displacement sensor under the elastic force action of the reset spring.

Preferably, the testing assembly further comprises a taper sliding block, a protection spring, a spring limiting seat and a spring adjusting knob;

the taper slider is convexly provided with a limiting flange and is arranged at the front end of the testing shell in a sliding manner;

the displacement sensor is fixedly arranged inside the taper sliding block;

the spring limiting seat is slidably arranged at the rear end of the testing shell, two ends of the protection spring are respectively connected with the spring limiting seat and the taper sliding block, and the spring limiting seat and the taper sliding block have a trend of being away from each other under the elastic force action of the protection spring;

the spring limiting seat is connected with one end of a spring adjusting knob, and the spring adjusting knob is in threaded connection with the testing shell.

Preferably, the upper dead point measuring mechanism further comprises a buffer assembly, and the buffer assembly comprises a hydraulic buffer and a buffer mounting block;

the hydraulic buffer is arranged on the test lifting platform, the buffer mounting block is arranged at the output end of the hydraulic buffer, and the buffer mounting block is connected with the test assembly.

Preferably, the rotor rotating mechanism comprises a lifting mechanism and a rotating mechanism; the rotating mechanism drives the lifting mechanism to do lifting motion along the vertical direction;

the rotating mechanism comprises a rotating driving assembly, a lifting plate, a bearing sleeve, a rotating mandrel, a floating mechanism and a clamping jaw mechanism;

the lifting plate is arranged at the output end of the lifting mechanism, the bearing sleeve is arranged in the center of the lifting plate, and the rotating mandrel is rotatably arranged inside the bearing sleeve;

the lower end of the rotating mandrel is in transmission connection with the rotary driving assembly, the upper end of the rotating mandrel is connected with the floating mechanism, and the clamping jaw mechanism is arranged at the upper end of the floating mechanism.

Preferably, the floating mechanism is provided with a rotating through hole, the clamping jaw mechanism is fixedly connected with the floating mechanism through a connecting block, the upper end of the rotating mandrel passes through the rotating through hole and is connected with the connecting block, and the rotating mandrel is connected with the connecting block through a universal coupling.

Preferably, the lifting mechanism comprises a lifting driving piece, a cylinder mounting plate and a plurality of linear bearings, and the rotating mechanism is provided with a plurality of guide shafts;

the cylinder mounting plate is fixedly arranged on the test bracket;

the lifting driving piece is fixedly arranged below the air cylinder mounting plate, and the output end of the lifting driving piece is connected with the rotating mechanism;

the linear bearings are fixedly arranged on the cylinder mounting plate, the linear bearings are respectively sleeved outside the guide shafts, and the guide shafts are driven by the lifting driving piece to move up and down in the linear bearings in a sliding manner.

Preferably, the rotary driving component comprises a rotary driving motor, a driving wheel, a synchronous belt and a driving wheel;

the rotary driving motor is fixedly arranged on the lifting plate, the driving wheel is arranged at the output end of the rotary driving motor, the driving wheel is arranged at one end of the rotating mandrel, and the driving wheel are connected through the synchronous belt in a transmission mode.

Preferably, the test lifting platform comprises a lifting seat, a fixed seat and a lifting driving assembly;

the lifting seat is arranged on one side of the fixed seat in a sliding manner along the vertical direction;

the lifting driving assembly comprises a rotating wheel, a lifting screw rod and a lifting nut;

the lifting screw rod is rotatably arranged on the other side of the fixed seat through a bearing seat, and the rotating wheel is connected with one end of the lifting screw rod;

the lifting nut is sleeved outside the lifting screw rod and is connected with the lifting screw rod in a matching way;

and a lifting connecting plate is convexly arranged on one side of the lifting seat and fixedly connected with the lifting nut.

Preferably, the crankcase pressing mechanism comprises a supporting column, a pressing fixing plate and a plurality of pressing components;

the pressing fixing plate is arranged above the conveying belt through the supporting columns;

the compaction assembly comprises a compaction driving part, a driving mounting plate, an adjusting plate and a compression bar;

the adjusting plate is provided with a transverse adjusting groove, the adjusting plate is fixed on the pressing fixing plate through mounting bolts in the transverse adjusting groove, the driving mounting plate is provided with a vertical adjusting groove, and the driving mounting plate is fixed on the adjusting plate through mounting bolts in the vertical adjusting groove; the compressing driving piece is fixedly arranged on the driving mounting plate, the pressing rod is arranged at the output end of the compressing driving piece, and the compressing driving piece drives the pressing rod to move in a stretching and retracting manner along the vertical direction.

The application also provides a top dead center testing method, which is applied to the top dead center testing equipment, wherein the crankcase is fixed on the material tray, and the testing comprises the following steps:

the material tray is conveyed to the position right above the rotor rotating mechanism through the conveying belt, and the material tray stops conveying;

the crankcase pressing mechanism presses a crankcase in the material tray;

the test lifting platform lifts the upper stop test mechanism to a test position parallel to a piston of the crankcase;

starting a testing telescopic driving piece of the upper stop point measuring mechanism, enabling a measuring head core shaft of the testing assembly to be tightly attached to a testing surface of a crankcase, and detecting first section displacement data of the measuring head core shaft by a displacement sensor;

the rotor rotating mechanism starts a rotor clamping the crankcase and drives the rotor to rotate, the rotor drives a piston to move towards the direction of the measuring head mandrel, the piston pushes the measuring head mandrel and triggers a displacement sensor, and the displacement sensor detects second-section displacement data of the measuring head mandrel;

obtaining the distance between the top dead center of the piston and the surface of the crankcase through the difference value of the second section of displacement data and the first section of displacement data detected by the displacement sensor;

and (3) repeatedly rotating the rotor for three times by using a rotor rotating mechanism, and averaging the difference values calculated by the displacement sensors for three times to obtain the final testing distance between the top dead center and the surface of the crankcase.

One of the above technical solutions has the following advantages or beneficial effects:

the rotor is grasped by the rotor rotating mechanism and rotates, the rotor drives the piston to move, the height of the piston moving to the top dead center is detected by the aid of the displacement sensor and the measuring head mandrel, detection accuracy is high, manual participation is reduced through automatic control in the whole process, labor cost is reduced, the height of the top dead center of the piston is measured accurately, and therefore the most appropriate gasket can be selected when the cylinder cover is used, and the compressor runs more stably.

Drawings

FIG. 1 is a perspective view of the overall structure of one embodiment of the top dead center testing apparatus of the present invention;

FIG. 2 is a top view of a top dead center measuring mechanism of one embodiment of the top dead center testing apparatus set forth in the present invention;

FIG. 3 is a cross-sectional view of an upper dead center measuring mechanism of one embodiment of the proposed upper dead center testing apparatus;

fig. 4 is a schematic perspective view of a rotor rotating mechanism of an embodiment of the top dead center testing apparatus according to the present invention;

fig. 5 is a sectional view of a rotor rotating mechanism of one embodiment of the top dead center testing apparatus proposed by the present invention;

fig. 6 is a schematic perspective view of a test lifting platform of an embodiment of the top dead center test equipment provided in the present invention;

FIG. 7 is a side schematic view of a crankcase hold down mechanism of one embodiment of the top dead center testing apparatus set forth in the disclosure;

fig. 8 is a partial perspective view of a crankcase hold down mechanism of one embodiment of the top dead center testing apparatus of the present invention.

Wherein: the device comprises a conveying belt 1, a material tray 2, a test support 3, a test lifting platform 4, a lifting seat 41, a lifting connecting plate 411, a fixed seat 42, a lifting driving component 43, a rotating wheel 431, a lifting screw rod 432, a lifting nut 433, an upper stop measuring mechanism 5, a test telescopic driving component 51, a test component 52, a test shell 521, a measuring head mandrel 522, a return spring 523, a displacement sensor 524, a taper slider 525, a protection spring 526, a spring limit seat 527, a spring adjusting knob 528, a buffer component 53, a hydraulic buffer 531, a buffer mounting block 532, a crankcase pressing mechanism 6, a support column 61, a pressing fixing plate 62, a pressing component 63, a pressing driving component 631, a driving mounting plate 632, an adjusting plate 633, a pressing rod 634, a transverse adjusting groove 601, a vertical adjusting groove 602, a rotor rotating mechanism 7, a lifting mechanism 71, a lifting driving component 711, a cylinder mounting plate 712, a linear bearing 713, a lifting driving component 631, a driving component 527, a protective spring, a hydraulic buffer component, a hydraulic buffer mounting plate, a hydraulic buffer, a hydraulic device, a test device, a, The device comprises a rotating mechanism 72, a guide shaft 720, a rotating drive assembly 721, a rotating drive motor 7211, a drive wheel 7212, a synchronous belt 7213, a driving wheel 7214, a lifting plate 722, a bearing sleeve 723, a rotating mandrel 724, a floating mechanism 725, a clamping jaw mechanism 726, a rotating through hole 727, a connecting block 728 and a universal coupling 729.

Detailed Description

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.

In the description of the present invention, it is to be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used merely for convenience of description and for simplicity of description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention. Furthermore, features defined as "first" and "second" may explicitly or implicitly include one or more of the features for distinguishing between descriptive features, non-sequential, non-trivial and non-trivial.

In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

An upper dead point testing device according to an embodiment of the present invention is described below with reference to fig. 1 to 8, and includes a conveyor belt 1, a material tray 2, a testing support 3, a testing lifting platform 4, an upper dead point measuring mechanism 5, a crankcase pressing mechanism 6, and a rotor rotating mechanism 7;

the material tray 2 is slidably arranged on the conveyer belt 1, and the conveyer belt 1 is arranged above the test bracket 3;

the rotor rotating mechanism 7 is arranged on the test bracket 3 and is positioned right below the conveying belt 1;

the crankcase pressing mechanism 6 is arranged above the conveyer belt 1, and the crankcase pressing mechanism 6 is positioned right above the rotor rotating mechanism 7;

the test lifting platform 4 is arranged on the test bracket 3 and is positioned on one side of the rotor rotating mechanism 7;

the upper stop measuring mechanism 5 comprises a testing telescopic driving piece 51 and a testing component 52, the testing component 52 is slidably arranged on the testing lifting platform 4, and the telescopic driving piece drives the testing component 52 to be close to or far away from the conveying belt 1;

the testing component 52 comprises a testing shell 521, a measuring head mandrel 522, a return spring 523 and a displacement sensor 524; the probe core shaft 522 is slidably disposed at the front end of the testing shell 521, the displacement sensor 524 is disposed inside the testing shell 521, and the probe core shaft 522 touches the detection end of the displacement sensor 524 in a sliding motion;

the return spring 523 is disposed between the measuring head core shaft 522 and the displacement sensor 524, and under the elastic force of the return spring 523, the measuring head core shaft 522 tends to be away from the displacement sensor 524.

In the specific work, the material tray 2 is transported on the transport belt 1, when the material tray is transported to the position right above the rotor rotating mechanism 7, the transport belt 1 stops the transportation of the material tray 2, a crankcase in the material tray 2 is compressed and positioned through a crankcase compressing mechanism 6, and the upper stop point testing mechanism is lifted to a testing position parallel to a piston of the crankcase by the testing lifting platform 4; starting the testing telescopic driving part 51 of the upper stop point measuring mechanism 5, tightly attaching the measuring head core shaft 522 of the testing component 52 to the testing surface of the crankcase, wherein the measuring head core shaft 522 touches the displacement sensor 524 at the moment, and the displacement sensor 524 is used for detecting the first section displacement data of the measuring head core shaft 522;

then, the rotor rotating mechanism 7 is started, the rotor of the crankcase is clamped and drives the rotor to rotate, the rotor drives the piston of the crankcase to move towards the direction of the measuring head mandrel 522, the piston can push the measuring head mandrel 522 and trigger the displacement sensor 524, and the displacement sensor 524 detects second-stage displacement data of the measuring head mandrel 522 when the piston moves to a top dead center; the distance between the top dead center of the piston and the surface of the crankcase is obtained by the difference between the second section of displacement data and the first section of displacement data detected by the displacement sensor 524.

It should be noted that, when the piston strikes the measuring head core shaft 522, the measuring head core shaft 522 moves towards the displacement sensor 524, at this time, the return spring 523 is further compressed, and then returns to the initial state under the elastic force of the return spring 523, and the displacement sensor 524 is triggered to perform measurement when the measuring head core shaft 522 moves next time.

In order to improve the accuracy of the test, the rotor rotating mechanism 7 is used for repeatedly rotating the rotor for at least three times, the displacement sensor 524 can detect data of at least three groups of difference values, the difference value data is averaged, so that the test distance between the final top dead center and the surface of the crankcase is obtained, and then a gasket with the corresponding thickness is selected according to the measured height distance of the top dead center when a cylinder cover is assembled on the test surface, so that the running stability of the compressor is ensured; the top dead center test equipment has high detection accuracy, reduces manual participation and labor cost through automatic control in the whole process, and accurately measures the height of the top dead center of the piston, so that the most appropriate gasket can be selected when the cylinder cover is used, and the compressor runs more stably.

In the preferred embodiment, the testing assembly 52 further includes a taper slider 525, a protection spring 526, a spring retainer 527, and a spring adjustment knob 528;

the taper slider 525 is convexly provided with a limiting flange 529, and the taper slider 525 is slidably arranged at the front end of the test shell 521;

the displacement sensor 524 is fixedly arranged inside the taper sliding block 525;

the spring limit seat 527 is slidably disposed at the rear end of the testing housing 521, two ends of the protection spring 526 are respectively connected with the spring limit seat 527 and the taper slider 525, and under the elastic force action of the protection spring 526, the spring limit seat 527 and the taper slider 525 have a tendency of being away from each other;

the spring limiting seat 527 is connected with one end of the spring adjusting knob 528, and the spring adjusting knob 528 is in threaded connection with the testing shell 521.

Specifically, the piston pushes the probe mandrel 522 to move so as to trigger the displacement sensor 524 to perform detection, when the distance between the top dead center of the piston is long, the displacement sensor 524 is suddenly impacted, which may damage the displacement sensor 524, thereby reducing the sensing sensitivity and solving the problem of inaccurate measurement, therefore, in this embodiment, the displacement sensor 524 is arranged in the center of the taper slider 525, the side surface of the taper slider 525 is an inclined surface provided with a taper, which provides a guiding function when the taper slider 525 slides, so as to ensure that the displacement sensor 524 and the probe mandrel 522 are on the same straight line, and the limit flange 529 abuts against the inner wall of the test housing 521, thereby preventing the taper slider 525 from falling out of the test housing 521; when the measuring head mandrel 522 impacts the displacement sensor 524, the taper sliding block 525 slides and compresses the protection spring 526, so that the displacement sensor 524 is displaced for a short distance, and then under the action of the elastic force of the protection spring 526, the taper sliding block 525 drives the sensor to recover to the initial position for detection, so that the displacement sensor 524 is effectively protected, and the service life of the displacement sensor 524 is prolonged; it should be noted that two ends of the protection spring 526 are respectively connected to the spring retainer 527 and the tapered slider 525, and the compression degree of the protection spring 526 can be adjusted by screwing the spring adjustment knob 528, so as to adjust the elastic force of the protection spring 526 and ensure that the tapered slider 525 is pressed against the front end of the test housing 521.

In the preferred embodiment, the upper dead center measuring mechanism 5 further includes a buffer assembly 53, and the buffer assembly 53 includes a hydraulic buffer 531 and a buffer mounting block 532;

the hydraulic buffer 531 is disposed on the test lifting platform 4, the buffer mounting block 532 is disposed at an output end of the hydraulic buffer 531, and the buffer mounting block 532 is connected to the test component 52.

Specifically, when the top dead center tests, the frequent striking of piston can cause the vibrations of test component 52, not only can send the noise influence environment, and can cause the not hard up problem of structure for a long time, be provided with buffering subassembly 53 in this embodiment, vibrations when the top dead center tests transmit to hydraulic buffer 531 through buffering installation piece 532, just can absorb the vibrations that produce in the top dead center test, thereby reduce the vibrations of test component 52, the noise reduction, avoid the not hard up of structure simultaneously, reduce the number of times of maintaining, and long service life.

In the preferred embodiment, the rotor rotating mechanism 7 includes a lifting mechanism 71 and a rotating mechanism 72; the rotating mechanism 72 drives the lifting mechanism 71 to do lifting motion along the vertical direction;

the rotating mechanism 72 comprises a rotating driving assembly 721, a lifting plate 722, a bearing sleeve 723, a rotating mandrel 724, a floating mechanism 725 and a clamping jaw mechanism 726;

the lifting plate 722 is arranged at the output end of the lifting mechanism 71, the bearing sleeve 723 is arranged at the center of the lifting plate 722, and the rotating mandrel 724 is rotatably arranged inside the bearing sleeve 723;

the lower end of the rotating mandrel 724 is in transmission connection with the rotating drive assembly 721, the upper end of the rotating mandrel 724 is connected with the floating mechanism 725, and the clamping jaw mechanism 726 is arranged at the upper end of the floating mechanism 725.

Specifically, in this embodiment, when the rotor needs to be grasped to rotate for performing the top dead center test, the lifting mechanism 71 lifts the rotating mechanism 72, so that the clamping jaw mechanism 726 is close to the rotor and opens the clamping jaws in advance, when the clamping jaws are lifted to the periphery of the rotor, the clamping jaw mechanism 726 is started to clamp the rotor, the clamping jaw mechanism 726 may be a three-jaw cylinder or the like, clamping of the rotor is completed by opening and closing the three jaws, friction force with the side wall of the rotor is increased, the problem of slipping and the like during clamping of the rotor is avoided, and meanwhile, the situation that the surface of the rotor is damaged due to a clamping tool is avoided; it should be noted that the floating mechanism may be a plane bearing, and the clamping jaw mechanism 726 and the bearing sleeve 723 are respectively installed at two ends of the plane bearing, so as to absorb errors generated by the clamping jaw mechanism 726 and the bearing sleeve 723 in the vertical direction;

in specific work, the lifting mechanism 71 drives the lifting plate 722 to do vertical lifting motion, power is transmitted to the rotating mandrel 724 through the rotary driving assembly 721, the rotating mandrel 724 rotates around the axis of the rotating mandrel 724, then the rotating power is transmitted to the clamping jaw mechanism 726, the rotor is driven to rotate, a bearing is installed in the bearing sleeve 723, the rotating mandrel 724 is installed through the bearing, the smoothness of the rotating motion is improved, further, the clamping jaw mechanism 726 is connected with the bearing sleeve 723 through the floating mechanism 725, the clamping jaw mechanism 726 has a floating function, when the clamping jaw mechanism 726 is not aligned with the axis of the rotor in the vertical direction, errors of a part of the rotor and the clamping jaw mechanism 726 in the vertical direction can be absorbed through the floating mechanism 725, the rotating mandrel 724 can effectively transmit the power to the clamping jaw mechanism 726, the transmission is more stable, and unstable transmission caused by deviation is avoided, Sloshing, and the like.

Preferably, the floating mechanism 725 is provided with a rotation through hole 727, the clamping jaw mechanism 726 is fixedly connected with the floating mechanism 725 through a connecting block 728, the upper end of the rotation mandrel 724 is connected with the connecting block 728 through the rotation through hole 727, and the rotation mandrel 724 is connected with the connecting block 728 through a universal coupling 729.

Specifically, in this embodiment, if the axes of the rotor and the rotating mandrel 724 are not on the same straight line, and there is an error, the floating mechanism 725 is used to absorb the error, and the rotating mandrel 724 is connected to the connecting block 728 of the clamping jaw mechanism 726 through the universal coupling 729, so that the universal coupling 729 is used to absorb the error between the rotor and the rotating mandrel 724, and the stability of the transmission of the rotating mandrel 724 to the clamping jaw mechanism 726 is further improved.

Further, the lifting mechanism 71 comprises a lifting driving member 711, a cylinder mounting plate 712 and a plurality of linear bearings 713, and the rotating mechanism 72 is provided with a plurality of guide shafts 720;

the cylinder mounting plate 712 is fixedly arranged on the test bracket 3;

the lifting driving member 711 is fixedly arranged below the cylinder mounting plate 712, and the output end of the lifting driving member 711 is connected with the rotating mechanism 72;

the linear bearings 713 are fixedly disposed on the cylinder mounting plate 712, and the linear bearings 713 are respectively sleeved outside the corresponding guide shafts 720, and the rotating mechanism 72 drives the guide shafts 720 to perform a sliding movement in the linear bearings 713 under the driving of the lifting driving member 711.

Specifically, in this embodiment, the lifting driving member 711 is started to directly drive the rotating mechanism 72 to move up and down, and during the lifting movement of the rotating mechanism 72, the guide shaft 720 of the rotating mechanism 72 is always limited in the linear bearing 713, so that the lifting movement of the rotating mechanism 72 is effectively guided and limited by the linear bearing 713, the stability of the lifting movement of the rotating mechanism 72 is improved, and meanwhile, the smoothness of the lifting movement of the rotating mechanism 72 can be improved by using the linear bearing 713.

Further, the rotary driving assembly 721 includes a rotary driving motor 7211, a driving wheel 7212, a timing belt 7213, and a driving wheel 7214;

the rotary drive motor 7211 is fixedly arranged on the lifting plate 722, the driving wheel 7212 is arranged at the output end of the rotary drive motor 7211, the driving wheel 7214 is arranged at one end of the rotating mandrel 724, and the driving wheel 7212 and the driving wheel 7214 are in transmission connection through the synchronous belt 7213.

Specifically, in this embodiment, the operation principle of the rotation driving assembly 721 is as follows, the rotation driving motor 7211 is started to drive the driving wheel 7212 to rotate, the synchronous belt 7213 drives the driving wheel 7214 to rotate, the synchronous belt 7213 transmits the force, the driving wheel 7214 is fixed on the rotation mandrel 724, the axes of the driving wheel 7214 and the rotation mandrel 724 are located on the same straight line, the rotation of the driving wheel 7214 drives the rotation mandrel 724 to rotate around its own axis, the transmission efficiency is high, and the structure is compact.

In the preferred embodiment, the test lifting platform 4 includes a lifting seat 41, a fixed seat 42 and a lifting driving assembly 43;

the lifting seat 41 is slidably arranged on one side of the fixed seat 42 along the vertical direction;

the lifting driving assembly 43 comprises a rotating wheel 431, a lifting screw 432 and a lifting nut 433;

the lifting screw 432 is rotatably arranged at the other side of the fixed seat 42 through a bearing seat, and the rotating wheel 431 is connected with one end of the lifting screw 432;

the lifting nut 433 is sleeved outside the lifting screw 432 and is connected with the lifting screw 432 in a matching manner;

a lifting connecting plate 411 is convexly arranged on one side of the lifting seat 41, and the lifting connecting plate 411 is fixedly connected with the lifting nut 433.

Specifically, in order to ensure that the top dead center measuring mechanism 5 and the piston of the crankcase are located on the same horizontal plane, the height of the top dead center measuring mechanism 5 needs to be adjusted, in this embodiment, the rotating wheel 431 is manually rotated to drive the lifting screw rod 432 to rotate, so that the lifting nut 433 is driven to perform lifting motion along the axis direction of the lifting screw rod 432, and the lifting nut 433 is connected with the lifting seat 41 through the lifting connecting plate 411, so that the lifting motion of the lifting nut 433 can drive the lifting seat 41 to perform lifting motion synchronously, and the whole structure is compact and the cost is low; when the height of the upper dead point measuring mechanism 5 needs to be adjusted, the rotating wheel 431 only needs to be manually rotated, and the operation is simple and convenient.

Further, the crankcase pressing mechanism 6 comprises a supporting column 61, a pressing fixing plate 62 and a plurality of pressing assemblies 63;

the pressing fixing plate 62 is arranged above the conveyer belt 1 through the supporting columns 61;

the compaction assembly 63 comprises a compaction driving member 631, a driving mounting plate 632, an adjusting plate 633 and a pressing rod 634;

the adjusting plate 633 is provided with a transverse adjusting groove 601, the adjusting plate 633 is fixed on the pressing and fixing plate 62 by mounting bolts on the transverse adjusting groove 601, the driving mounting plate 632 is provided with a vertical adjusting groove 602, and the driving mounting plate 632 is fixed on the adjusting plate 633 by mounting bolts on the vertical adjusting groove 602; the pressing driving member 631 is fixedly disposed on the driving mounting plate 632, the pressing rod 634 is disposed at an output end of the pressing driving member 631, and the pressing driving member 631 drives the pressing rod 634 to move in a vertical direction in a telescopic manner.

Specifically, in this embodiment, the pressing assembly 63 is mounted on the fixing plate of the press, and is fixed right above the rotor rotating mechanism 7, so as to press and fix the crankcase on the material tray 2 downward; specifically, the adjusting plate 633 is fixed to the pressing and fixing plate 62 by mounting bolts in a horizontal adjusting groove 601, and the driving mounting plate 632 is fixed to the adjusting plate 633 by mounting bolts in a vertical adjusting groove 602; when the position that the pressing rod 634 compresses the crankcase is inaccurate, the adjusting of the position of the pressing rod 634 can be realized by loosening the bolts and utilizing the transverse adjustment of the adjusting plate 633 and the vertical adjustment of the driving mounting plate 632, the operation is simple and convenient, the whole structure is compact, and the cost can be reduced.

The application also provides a top dead center testing method, which is applied to the top dead center testing equipment, wherein the crankcase is fixed on the material tray 2, and the testing comprises the following steps:

the material tray 2 is conveyed to the position right above the rotor rotating mechanism 7 through the conveying belt 1, and the material tray 2 stops conveying;

the crankcase pressing mechanism 6 presses the crankcase in the material tray 2;

the test lifting platform 4 lifts the upper stop test mechanism to a test position parallel to the piston of the crankcase;

starting the testing telescopic driving piece 51 of the upper stop point measuring mechanism 5, enabling the measuring head core shaft 522 of the testing component 52 to be tightly attached to the testing surface of the crankcase, and detecting first-section displacement data of the measuring head core shaft 522 by the displacement sensor 524;

the rotor rotating mechanism 7 starts a rotor clamping the crankcase and drives the rotor to rotate, the rotor drives a piston to move towards the direction of the measuring head mandrel 522, the piston pushes the measuring head mandrel 522 and triggers the displacement sensor 524, and the displacement sensor 524 detects second-stage displacement data of the measuring head mandrel 522;

obtaining the distance between the top dead center of the piston and the surface of the crankcase through the difference value between the second section of displacement data and the first section of displacement data detected by the displacement sensor 524;

and (3) repeatedly rotating the rotor for three times by using the rotor rotating mechanism 7, and averaging the difference values calculated by the displacement sensor 524 for three times to obtain the final testing distance between the top dead center and the surface of the crankcase.

Specifically, in this embodiment, in order to improve the accuracy of the test, the rotor is repeatedly rotated at least three times by using the rotor rotating mechanism 7, the displacement sensor 524 may detect data of at least three sets of difference values, and the difference value data is averaged to obtain a test distance between a final top dead center and a crankcase surface, and then a gasket with a corresponding thickness is selected according to the measured height distance between the top dead center when the cylinder cover is assembled on the test surface, so as to ensure the stability of the operation of the compressor; the top dead center testing method has high precision in detecting the distance of the top dead center, reduces the participation of manpower, reduces the labor cost, and accurately measures the height of the top dead center of the piston, so that the most appropriate gasket can be selected when the cylinder cover is used, and the compressor can run more stably.

Other configurations and operations of an upper dead point testing apparatus and a testing method thereof according to an embodiment of the present invention are known to those of ordinary skill in the art and will not be described in detail herein.

In the description herein, references to the description of the terms "embodiment," "example," etc., mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims

1. An upper dead point test apparatus characterized in that: the device comprises a conveyor belt, a material tray, a test bracket, a test lifting platform, an upper stop measuring mechanism, a crankcase pressing mechanism and a rotor rotating mechanism;

2. An upper dead point testing apparatus according to claim 1, characterized in that: the testing assembly also comprises a taper sliding block, a protection spring, a spring limiting seat and a spring adjusting knob;

the displacement sensor is fixedly arranged inside the taper sliding block;

3. An upper dead point testing apparatus according to claim 1, characterized in that: the upper stop point measuring mechanism also comprises a buffer assembly, and the buffer assembly comprises a hydraulic buffer and a buffer mounting block;

4. An upper dead point testing apparatus according to claim 1, characterized in that: the rotor rotating mechanism comprises a lifting mechanism and a rotating mechanism; the rotating mechanism drives the lifting mechanism to do lifting motion along the vertical direction;

5. An upper dead point testing apparatus according to claim 4, characterized in that: the floating mechanism is provided with a rotating through hole, the clamping jaw mechanism is fixedly connected with the floating mechanism through a connecting block, the upper end of the rotating mandrel passes through the rotating through hole and is connected with the connecting block, and the rotating mandrel is connected with the connecting block through a universal coupling.

6. An upper dead point testing apparatus according to claim 4, characterized in that: the lifting mechanism comprises a lifting driving piece, a cylinder mounting plate and a plurality of linear bearings, and the rotating mechanism is provided with a plurality of guide shafts;

the cylinder mounting plate is fixedly arranged on the test bracket;

7. An upper dead point testing apparatus according to claim 4, characterized in that: the rotary driving component comprises a rotary driving motor, a driving wheel, a synchronous belt and a driving wheel;

8. An upper dead point testing apparatus according to claim 1, characterized in that: the test lifting platform comprises a lifting seat, a fixed seat and a lifting driving assembly;

9. An upper dead point testing apparatus according to claim 1, characterized in that: the crankcase pressing mechanism comprises a supporting column, a pressing fixing plate and a plurality of pressing components;

10. A top dead center testing method, characterized by: in use in the top dead center testing apparatus of any one of claims 1 to 9, the crankcase being secured to the material tray, the testing comprising the steps of:

the crankcase pressing mechanism presses a crankcase in the material tray;