CN115371614A

CN115371614A - Floating measuring head and battery can body measuring equipment

Info

Publication number: CN115371614A
Application number: CN202211117511.2A
Authority: CN
Inventors: 林巨广; 刘哲; 杨路生
Original assignee: Anhui Juyi Technology Co Ltd
Current assignee: Anhui Juyi Technology Co Ltd
Priority date: 2022-09-14
Filing date: 2022-09-14
Publication date: 2022-11-22

Abstract

The invention relates to the technical field of flexible measurement, in particular to a floating measuring head and a measuring device for a battery pack shell, wherein the floating measuring head comprises a fixed plate, a floating plate, a telescopic assembly, a plurality of floating rods, a first position sensor and at least three reference blocks; one end of each floating rod is fixed on the floating plate, the other end of each floating rod extends to the side where the fixing plate is located and penetrates through a preset through hole in the fixing plate, each floating rod is provided with a rod body with a large diameter section and a small diameter section, the floating plate is close to a workpiece to be detected, so that a reference block of the floating plate is in contact with the workpiece to be detected, the fixing plate is pushed and extruded to move to the rod body with the small diameter section along the floating rods to achieve floating adjustment, and when the fixing plate moves to the lowest position of the rod body with the small diameter section, the first position sensor detects position signals of the floating rods and starts detection; the floating measuring head provided by the invention can realize floating at a certain angle when being attached to a workpiece to be measured, so that the floating measuring head is ensured to be perfectly attached to the workpiece to be measured, and the accuracy of measured data is further ensured.

Description

Floating measuring head and battery can body measuring equipment

Technical Field

The invention relates to the technical field of flexible measurement, in particular to a floating measuring head and a measuring device for a battery pack shell.

Background

The measuring station needs to have a reference for measurement during measurement, and the reference generally has two designs: 1) The numerical values of the two surfaces relative to the reference are measured by taking the equipment as the reference, and then calculation is carried out. Due to the fact that extra reference is intervened, measurement interference factors are increased, and the method is not often used for measurement with high precision; 2) Taking the workpiece itself as a reference, directly measuring the value of the other surface relative to the reference surface, which is most commonly used in the method;

for the conventional measuring method 2), the measured surface of the product workpiece is taken as a reference, and floating measurement is used. For float measurements, two categories are distinguished: (1) Workpieces float and are often used under the conditions that the workpieces are light and the positioning of the workpieces is poor; (2) The measuring head floats, the application is wide, and the measuring station is commonly used for detection.

However, the prior art lacks flexible measurements, especially for applications in robotic measurement stations in battery production lines; in addition, present floating is mostly the spring, and is not high to the work piece positioning accuracy that awaits measuring, and measurement station that measurement accuracy required is higher, and controllable degree is good inadequately.

Disclosure of Invention

Aiming at the problems in the prior art, the invention aims to provide a floating measuring head which can measure a workpiece to be measured with low positioning precision and ensure the realization of high-precision measurement.

In order to achieve the above object, the present invention provides a floating probe, comprising:

the fixing plate is used for connecting the supporting component;

the floating plate is arranged close to the fixed plate at intervals, and a measuring assembly is arranged on the floating plate and used for measuring a workpiece to be measured;

a telescopic assembly disposed between the floating plate and the fixed plate, the telescopic assembly being compressible to bring the floating plate and the fixed plate close to each other;

one end of each floating rod is fixed on the floating plate, and the other end of each floating rod extends to the side where the fixed plate is located and penetrates through a through hole preset in the fixed plate;

the first position sensor is arranged on the fixing plate and used for detecting a position signal of the floating rod which is penetrated through the through hole; and the number of the first and second groups,

the at least three reference blocks are arranged on one side, away from the fixed plate, of the floating plate and are used for contacting a workpiece to be measured so as to construct a measurement reference surface;

the floating plates are close to a workpiece to be detected, so that the reference blocks of the floating plates contact the workpiece to be detected, the fixing plates are pushed to move to the small-diameter section rod body along the floating rods to achieve floating adjustment, and when the fixing plates move to the lowest position of the small-diameter section rod body, the first position sensor detects position signals of the floating rods and starts detection.

Optionally, the floating probe further comprises:

and the second position sensor is arranged on the fixed plate and used for detecting the position signal of the floating rod after the telescopic assembly restores and closing the detection.

Optionally, the telescopic assembly is an air cylinder, the air cylinder is fixed on the floating plate, and the end of the piston rod of the air cylinder is fixed on the fixed plate.

Optionally, the telescopic assembly is a spring, one end of the spring is fixed on the floating plate, and the other end of the spring is fixed on the fixed plate.

Optionally, the floating probe further comprises:

and the in-place sensors are arranged on two sides of the floating plate and used for detecting in-place signals of the workpiece to be detected.

Optionally, a positioning bushing is arranged in the through hole of the fixing plate, and the positioning bushing and the large-diameter section rod body of the floating rod form guiding and limiting matching.

Optionally, a stopper is disposed at an upper end of the floating rod and used for stopping and limiting the upper plate surface of the fixing plate.

Optionally, the measuring assembly is a plurality of displacement sensors arranged on one side of the floating plate away from the fixed plate;

the displacement sensor comprises a first displacement sensor arranged on the plane of the reference block and a second displacement sensor far away from the plane of the reference block.

Optionally, the support assembly is a robot, a KBK telescopic arm or a vertical skid.

The invention also provides a battery pack shell measuring device which is provided with the floating measuring head.

Compared with the prior art, the floating measuring head provided by the invention can realize floating at a certain angle when being attached to a workpiece to be measured, so that the floating measuring head is ensured to be perfectly attached to the workpiece to be measured, and the accuracy of measured data is further ensured; in addition, the floating measuring head provided by the invention specifically uses at least three reference blocks to be attached to a workpiece to be measured so as to construct a measuring reference surface, namely the workpiece to be measured is used as a measuring reference, so that the accuracy and repeatability of measuring data are ensured.

Based on the application of the floating measuring head on the battery pack shell measuring equipment, the flexible measurement of the shell in the existing battery pack production line is realized, and the technical blank is filled.

In addition, the floating measuring head provided by the invention also effectively avoids the defects of poor controllability and poor measuring precision caused by the dependence of the existing floating measurement on a spring;

the floating measuring head provided by the invention can fully play the advantage of high-precision measurement when the positioning precision of the workpiece to be measured is not high due to the fact that the workpiece to be measured is heavy, and further has a good application prospect.

Drawings

Fig. 1 is a schematic structural diagram of a floating probe according to an embodiment of the present invention;

fig. 2 is a bottom view of a floating probe according to an embodiment of the present invention;

FIG. 3 isbase:Sub>A cross-sectional view of section A-A of FIG. 2;

fig. 4 is a schematic diagram of a floating probe measurement battery pack housing with a robot as a support assembly according to an embodiment of the present invention;

FIG. 5 is an enlarged schematic view of position B of FIG. 4;

figure 6 is a cross-sectional view of a floating probe measurement battery pack housing according to an embodiment of the present invention;

description of the reference numerals

1. A workpiece to be measured; 10. a fixing plate; 11. a through hole; 111. positioning the bushing; 12. a first position sensor; 13. a second position sensor; 14. a mounting base; 20. a support assembly; 30. a floating plate; 31. a reference block; 32. a displacement sensor; 321. a first displacement sensor; 322. a second displacement sensor; 33. an in-situ sensor; 34. a slider fixing bracket; 35. a pneumatic slider; 36. a third displacement sensor; 37. a support; 38. a spherical contact; 39. a slider guide bar; 40. a telescopic assembly; 50. a floating rod; 51. a rod body of a small diameter section; 52. a rod body of a large-diameter section; 53. and a stop block.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further clarified below by combining the specific drawings.

As described above, referring to fig. 1, 2 and 3, the present invention provides a floating probe, which includes a fixed plate 10, a floating plate 30, a telescopic assembly 40, a plurality of floating rods 50, a first position sensor 12 and at least three reference blocks 31.

The fixed plate 10 and the floating plate 30 mainly play a role in supporting and fixing, and are used for installing and arranging parts such as the telescopic assembly 40, the floating rod 50, the first position sensor 12, the reference block 31 and the like; the fixed plate 10 is used for connecting a support assembly 20, the floating probe is close to or far away from a workpiece 1 to be measured through the support assembly 20, the floating plate 30 and the fixed plate 10 are arranged at intervals, a telescopic assembly 40 is arranged between the floating plate 30 and the fixed plate 10, and the telescopic assembly 40 can be compressed to enable the floating plate 30 and the fixed plate 10 to be close to each other; one end of the floating rod 50 is fixed on the floating plate 30, and the other end extends to the side of the fixed plate 10 and penetrates through a through hole 11 preset on the fixed plate 10; the first position sensor 12 is disposed on the fixing plate 10, and is configured to detect a position signal of the floating rod 50 that is inserted through the through hole 11; the reference block 31 is arranged on one side of the floating plate 30 away from the fixed plate 10 and is used for contacting the workpiece 1 to be measured to construct a measurement reference surface; the floating rods 50 are provided with a large-diameter rod body and a small-diameter rod body, after the floating plate 30 is close to the workpiece 1 to be measured and the reference block 31 of the floating plate is in contact with the workpiece 1 to be measured, the fixed plate 10 is pushed and extruded to move to the small-diameter rod body 51 of the floating plate along the floating rods 50 to achieve floating adjustment, and when the fixed plate 10 moves to the lowest position of the small-diameter rod body 51, the first position sensor 12 detects position signals of the floating rods 50 and starts detection.

When the floating measuring head provided by the invention works specifically, the whole floating measuring head is driven to be inserted into a workpiece 1 to be measured through the supporting assembly 20 for measurement, the reference block 31 arranged on the floating plate 30 is firstly contacted with the workpiece 1 to be measured, because the reference block is blocked, the telescopic assembly 40 arranged between the floating plate 30 and the fixed plate 10 is compressed at the moment, the fixed plate 10 moves along the rod length direction of the floating rod 50, and when the fixed plate moves to the small-diameter section rod body 51 of the floating rod 50, a gap exists between the through hole 11 reserved on the fixed plate 10 and the small-diameter section rod body 51 to allow the floating adjustment of the floating plate 30, so that the reference block 31 arranged on the fixed plate is better attached to the workpiece 1 to be measured to construct a measurement reference surface, and when the fixed plate 10 moves to the lowest position of the small-diameter section rod body 51, the first position sensor 12 detects a position signal of the floating rod 50 and starts detection.

The floating measuring head provided by the invention can realize floating at a certain angle when being attached to the workpiece 1 to be measured, so that the floating measuring head is ensured to be perfectly attached to the workpiece 1 to be measured, and the accuracy of measured data is further ensured.

According to the floating measuring head provided by the invention, the main body structure of the floating measuring head is constructed by the floating plate 30 and the fixed plate 10 which are arranged at intervals, the telescopic component 40 and the floating rod 50 which are arranged between the floating plate 30 and the fixed plate 10 are matched, reverse thrust when the floating measuring head is close to a workpiece 1 to be measured is ingeniously utilized, the telescopic component 40 is compressed, the fixed plate 10 moves on the floating rod 50, and then the floating adjustment of the floating plate 30 on the surface of the workpiece 1 to be measured is realized, so that the tolerance of the workpiece 1 to be measured during production and manufacturing is adapted, and the accuracy of measured data is ensured; the floating measuring head has the advantages of simple structure and convenience in use, and can meet the measuring requirements of various workpiece depth sizes.

In the present invention, the planar floating amount of the floating plate 30 on the surface of the workpiece 1 to be measured depends on the gap between the rod body 51 of the small diameter section of the floating rod 50 and the through hole 11 and the opening distance between the floating rods 50; the angular floating of the floating plate 30 depends on the ratio of the guide length (i.e., the length of the small-diameter rod body 51) to the floating clearance (i.e., the clearance between the small-diameter rod body 51 and the through hole 11).

According to the floating measuring head provided by the present invention, the telescopic assembly 40 is used for driving the floating plate 30 and the fixed plate 10 to move away from each other to an initial position, in the process, the fixed plate 10 moves from the small-diameter section rod body 51 to the large-diameter section rod body 52 along the rod length direction of the floating rod 50 and forms a guiding limit fit with the large-diameter section rod body 52, in order to provide a closing signal for the measuring assembly, in some embodiments, the floating measuring head further includes a second position sensor 13, and the second position sensor 13 is disposed on the fixed plate 10 and is used for detecting the position signal of the floating rod 50 after the telescopic assembly 40 is restored and closing the detection, that is, closing the measuring assembly.

In some embodiments, the telescopic assembly 40 is a cylinder fixed to the floating plate 30 and the end of its piston rod is fixed to the fixed plate 10. When the floating measuring head is close to the workpiece 1 to be measured, the reference block 31 arranged on the floating plate 30 is firstly close to the workpiece 1 to be measured, and due to being blocked, the air cylinder at the moment starts to be compressed, the fixed plate 10 starts to move to the rod body 51 of the small-diameter section along the floating rod 50 so as to realize the floating adjustment of the floating plate 30, and when the fixed plate 10 moves to the lowest position of the rod body 51 of the small-diameter section, the first position sensor 12 detects a position signal of the floating rod 50 and starts the detection.

After the detection is finished, the floating measuring head begins to be separated from the workpiece 1 to be detected, at the moment, the air cylinder provides restoring force to enable the fixed plate 10 and the floating plate 30 to be away from each other, and the fixed plate 10 moves to the rod body 52 of the large-diameter section along the rod length direction of the floating rod 50 to achieve guiding and limiting matching.

It should be noted that, in the present invention, the supporting assembly 20 brings the whole floating probe into contact with the workpiece 1 to be measured to perform measurement, and in order to avoid generating additional torque to ensure more stable measurement, the installation position of the air cylinder is preferably the central position of the floating plate 30. Furthermore, in order to measure the parameters of the center position of the workpiece 1 to be measured, an indirect measurement assembly is further arranged on the floating measurement head, as shown in fig. 4 and 5, the indirect measurement assembly includes a slider fixing support 34 extending in the direction away from the floating plate 30, a pneumatic slider 35 is arranged on the slider fixing support 34, a third displacement sensor 36 and a support 37 extending to the side where the air cylinder is located are arranged on the pneumatic slider 35, and a spherical contact 38 is arranged on the support 37.

In the specific use process, before the cylinder is compressed, the spherical contact 38 on the bracket 37 contacts the workpiece 1 to be measured, pushes the bracket 37 and drives the pneumatic slide block 35 to move until the bracket 37 contacts the cylinder and then starts to push the compressed cylinder, and the third displacement sensor 36 arranged on the pneumatic slide block 35 can record the movement amount of the compressed cylinder; the parameter to be measured of the central position corresponding to the air cylinder is converted into the movement amount of the pneumatic slide block 35 through the indirect measurement component, and the parameter measurement of the central position is indirectly realized.

It should be noted that, in order to ensure that the pneumatic slider 35 can be quickly and stably returned, a spring (not shown in the figure) is sleeved on the slider guide rod 39 of the pneumatic slider 35, the spring is compressed during the movement of the bracket 37 and the contact with the air cylinder, and after the measurement is completed, the elastic force of the spring can drive the pneumatic slider 35 to return to the initial position to wait for the measurement of the next workpiece 1 to be measured.

In some embodiments, the retraction assembly 40 is a spring having one end fixed to the floating plate 30 and the other end fixed to the stationary plate 10. The working principle of the floating measuring head is the same as that of the telescopic assembly 40 which is a cylinder, and the details are not described here.

It should be noted that, after the detection is completed, the spring provides the restoring force to move the fixed plate 10 and the floating plate 30 away from each other. The inventor of the application finds that in the floating measuring head provided by the invention, the cylinder is used as the telescopic assembly 40, and compared with a spring, the high-precision accurate measurement can be realized under the condition that the positioning precision of the workpiece 1 to be measured is not high.

In some embodiments, the floating probe further includes in-place sensors 33, and the in-place sensors 33 are disposed on two sides of the floating plate 30 and are used for detecting in-place signals of the workpiece 1 to be measured. The signal of the workpiece 1 to be measured is detected by the position sensor 33, and then the detection of the measuring assembly is enabled. It should be noted that the two in-situ sensors 33 are arranged to detect the workpiece 1 to be measured and interlock measurement values, so that error data uploading to a system caused by equipment abnormality can be well avoided, and influence on a subsequent production process is avoided.

In some embodiments, a positioning bushing 111 is disposed in the through hole 11 of the fixing plate 10, and the positioning bushing 111 forms a guiding and limiting fit with the rod body 52 of the large-diameter section of the floating rod 50.

In some embodiments, a stopper 53 is disposed at the upper end of the floating rod 50 for limiting the upper plate surface of the fixing plate 10. By the arrangement of the stop 53, the floating rod 50 is prevented from being separated from the through hole 11 of the fixing plate 10 due to the excessive restoring force of the telescopic assembly 40.

In the present invention, the measuring component is used for measuring the workpiece 1 to be measured, and in a specific embodiment of the present invention, the measuring component is a plurality of displacement sensors 32 arranged on one side of the floating plate 30 away from the fixed plate 10; the displacement sensor 32 includes a first displacement sensor 321 disposed on the plane of the reference block 31 and a second displacement sensor 322 disposed away from the plane of the reference block 31.

In a specific application, the reference plane is measured by the first displacement sensor 321 located on the plane of the reference block 31, and the depth measurement of the workpiece 1 to be measured is realized by the second displacement sensor 322 located far away from the plane of the reference block 31.

In a specific application example of the invention, the workpiece 1 to be measured is a battery pack shell, and accurate input is provided for a servo constant delivery pump in a subsequent gluing process of the heat-conducting glue through accurate measurement of the battery pack shell, so that the battery module and the battery pack shell are tightly attached through the heat-conducting glue, and further good heat dissipation is realized.

More specifically, three first displacement sensors 321 are arranged, and are used for correspondingly measuring reference surfaces formed by the three reference blocks 31 on the upper end surface of the battery pack shell; the second displacement sensor 322 is arranged with a plurality of zones to refine the bottom of the battery pack housing as much as possible to achieve a more accurate depth measurement of the battery pack housing. In a specific embodiment of the present invention, 9 second displacement sensors 322 are arranged. It should be noted that when the glue coating amount is input to the servo constant delivery pump, the number of the second displacement sensors 322 can be increased or decreased according to the number of the specific data points, and the glue coating amount of more points can be calculated through linear simulation, for example, the depth of the battery pack shell measured at the point a is 100mm, the depth of the battery pack shell measured at the point B is 99mm, the depth of the battery pack shell measured at the intermediate point between the point a and the point B can be linearly simulated to be 99.5mm, and then the glue coating amount is calculated with the height of the battery module corresponding to the point, so that the glue coating amount is obtained.

In some embodiments, the support assembly 20 is a robot, a KBK telescopic arm, or a vertical skid.

It should be noted that the floating measurement head of the present invention specifically approaches or leaves the workpiece 1 to be measured through the support assembly 20, that is, the support assembly 20 is a measurement moving unit of the floating measurement head of the present invention, so that different support assemblies 20 can be used under different conditions, for example, when manual measurement or standby measurement is performed, a KBK telescopic arm is used as the support assembly 20; if the number of the measurement positions of the workpiece 1 to be measured is small, the vertical sliding table is used as the supporting assembly 20; for example, when the workpiece 1 to be measured has a plurality of measurement positions, the robot may be used as the support assembly 20 to fully exert the flexibility of the robot, as shown in fig. 4 and 6.

Furthermore, in the present invention, the fixing plate 10 is further provided with a mounting seat 14 for connecting the supporting member 20.

The foregoing shows and describes the general principles, essential features, and inventive features of this invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A floating probe, comprising:

a fixing plate (10) for connecting the support assembly (20);

the floating plate (30) is arranged close to the fixed plate (10) at intervals, and a measuring component is arranged on the floating plate (30) and used for measuring a workpiece (1) to be measured;

a telescopic assembly (40) disposed between the floating plate (30) and the fixed plate (10), the telescopic assembly (40) being compressible to bring the floating plate (30) and the fixed plate (10) close to each other;

one end of each floating rod (50) is fixed on the floating plate (30), and the other end of each floating rod (50) extends towards the side where the fixed plate (10) is located and penetrates through a through hole (11) preset in the fixed plate (10);

a first position sensor (12) provided on the fixed plate (10) for detecting a position signal of the floating rod (50) inserted through the through hole (11); and the number of the first and second groups,

the three reference blocks (31) are arranged on one side, away from the fixed plate (10), of the floating plate (30) and used for contacting the workpiece (1) to be measured to construct a measuring reference surface;

wherein, many floating rods (50) all have a big, the little diameter section body of rod, after floating plate (30) are close to work piece (1) that awaits measuring and make its reference block (31) contact work piece (1) that awaits measuring, push fixed plate (10) move to its little diameter section body of rod (51) department along floating rod (50) in order to realize the adjustment of floating, and when fixed plate (10) moved the extreme lower position to little diameter section body of rod (51), first position sensor (12) detect the position signal of floating rod (50) and open the detection.

2. A floating probe according to claim 1, further comprising:

and the second position sensor (13) is arranged on the fixed plate (10) and is used for detecting the position signal of the floating rod (50) after the telescopic assembly (40) restores and closing the detection.

3. A floating probe according to claim 1, characterized in that said telescopic assembly (40) is a pneumatic cylinder fixed to said floating plate (30) and the end of its piston rod is fixed to said fixed plate (10).

4. A floating probe according to claim 1, characterized in that said telescopic assembly (40) is a spring fixed at one end to the floating plate (30) and at the other end to the fixed plate (10).

5. A floating probe according to claim 1, further comprising:

and the in-place sensors (33) are arranged on two sides of the floating plate (30) and are used for detecting in-place signals of the workpiece (1) to be detected.

6. The floating measuring head according to claim 1, characterized in that a positioning bush (111) is arranged in the through hole (11) of the fixing plate (10), and the positioning bush (111) and the rod body (52) of the large-diameter section of the floating rod (50) form a guiding and limiting fit.

7. A floating measuring head according to claim 1, characterized in that the upper end of the floating rod (50) is provided with a stop (53) for limiting against the upper plate surface of the fixed plate (10).

8. A floating probe according to claim 1, characterized in that said measuring means are a plurality of displacement sensors (32) arranged on the side of said floating plate (30) remote from the fixed plate (10);

the displacement sensor (32) comprises a first displacement sensor (321) arranged on the plane of the reference block (31) and a second displacement sensor (322) far away from the plane of the reference block (31).

9. A floating probe according to claim 1, characterized in that the support assembly (20) is a robot, a KBK telescopic arm or a vertical slide.

10. A battery can casing measuring device having a floating probe according to any one of claims 1 to 9.