Thickness measuring mechanism

Abstract

The utility model belongs to the technical field of battery cell thickness measurement, and discloses a thickness measuring mechanism, in which a support member is arranged on a rack and is used for supporting an object to be measured; the pressing plate is slidably arranged on the rack in the vertical direction, and the lower surface of the pressing plate can make contact with the upper surface of an object to be detected. The pressure sensor is used for reading the pressure between the lower surface of the pressing plate and the upper surface of the to-be-detected object; the displacement sensor comprises a fixed end and a measuring end, the fixed end is arranged on the pressing plate, the measuring end can abut against the supporting piece, when the thickness of the to-be-measured object needs to be measured, the pressing plate can be controlled to press downwards so that the pressing plate can make contact with the to-be-measured object, and when the reading of the pressure sensor reaches a preset value, the thickness of the to-be-measured object can be measured by reading the reading of the displacement sensor. In addition, the lower surface of the pressing plate is provided with an air outlet hole, and the air outlet hole can discharge air entering the air flow channel to the position between the lower surface of the pressing plate and the upper surface of the to-be-measured object, so that adhesion of the pressing plate and the to-be-measured object is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of cell thickness measurement, in particular to a thickness measurement mechanism. Background Art

[0002] During the production process of a cell, it is necessary to measure its thickness. In this regard, the prior art provides a cell pressing thickness detection device. Among them, the cell to be detected is placed on a jig, a reference block is arranged on the jig, and in addition, an upper pressing plate, a pressure sensor arranged on the upper pressing plate, and a displacement sensor are also arranged. When measuring the thickness, the air cylinder drives the upper pressing plate to move downward and abut against the upper surface of the cell. The pressure sensor is used to obtain the pressure applied by the upper pressing plate to the cell. When the reading of the pressure sensor reaches a preset value, the displacement sensor has already contacted the reference block and generated a certain displacement, and the thickness measurement value of the cell is obtained based on the reading of the displacement sensor. In addition, in order to prevent the upper pressing plate from sticking to the surface of the cell, the upper pressing plate adopts an anti-sticking pressing plate. However, the surface of the anti-sticking pressing plate needs to be made of an anti-sticking material, and the cost is relatively high. Summary of the Utility Model

[0003] According to one aspect of the present utility model, the present utility model provides a thickness measurement mechanism to solve the problem in the prior art that the upper pressing plate needs to adopt an anti-sticking pressing plate, and the surface of the anti-sticking pressing plate needs to be made of an anti-sticking material, resulting in a relatively high cost.

[0004] To achieve the above object, the present utility model adopts the following technical solutions:

[0005] A thickness measurement mechanism for measuring the thickness of an item to be measured, comprising:

[0006] A frame;

[0007] A support member arranged on the frame and used to support the item to be measured;

[0008] A pressing plate slidably arranged in the vertical direction on the frame, the lower surface of the pressing plate can contact the upper surface of the item to be measured, the pressing plate has an air flow channel for gas to enter, and the lower surface of the pressing plate has air outlet holes for the gas in the air flow channel to be discharged;

[0009] A pressure sensor for reading the pressure between the lower surface of the pressing plate and the upper surface of the item to be measured;

[0010] A displacement sensor including a fixed end and a measuring end, the fixed end is arranged on the pressing plate, and the measuring end can abut against the support member.

[0011] As a preferred solution of the thickness measurement mechanism, an air inlet hole is opened on the side wall of the pressing plate, and the air inlet hole is communicated with the air flow channel and used to connect a gas source.

[0012] As a preferred solution of the thickness measuring mechanism, a plurality of air outlets are provided.

[0013] As a preferred solution of the thickness measuring mechanism, it further includes a pressing plate driving member for driving the pressing plate to reciprocate vertically relative to the frame.

[0014] As a preferred solution of the thickness measuring mechanism, the frame has a first guide rail extending in the horizontal direction, and the support member is slidably engaged with the first guide rail.

[0015] As a preferred solution of the thickness measuring mechanism, it further includes a position detection mechanism arranged on one side of the first guide rail. The position detection mechanism has a transmitting end and a receiving end. The transmitting end is used for emitting light, and the receiving end is used for receiving the light emitted by the transmitting end and reflected by the support member.

[0016] As a preferred solution of the thickness measuring mechanism, the support member includes a support platform and a reference block. The support platform is used for supporting the item to be measured, and the measuring end of the displacement sensor can abut against the reference block.

[0017] As a preferred solution of the thickness measuring mechanism, a plurality of displacement sensors are provided, and a plurality of reference blocks are provided. The upper surfaces of the plurality of reference blocks are at the same height relative to the support platform, and the measuring ends of the plurality of displacement sensors can abut against the plurality of reference blocks one by one.

[0018] As a preferred solution of the thickness measuring mechanism, the support member further includes a limiting rod arranged on the support platform, and the limiting rod can abut against the lower surface of the pressing plate in the vertical direction.

[0019] As a preferred solution of the thickness measuring mechanism, the frame is provided with a buffer block, and the buffer block is located below the pressing plate.

[0020] The beneficial effects of the present utility model are:

[0021] The present utility model provides a thickness measuring mechanism for measuring the thickness of an article to be measured. The thickness measuring mechanism includes a frame, a support member, a pressing plate, a pressure sensor, and a displacement sensor. The support member is disposed on the frame and is used to support the article to be measured. The pressing plate is slidably disposed on the frame in the vertical direction, and the lower surface of the pressing plate can contact the upper surface of the article to be measured. The pressing plate has an air flow channel for gas to enter, and the lower surface of the pressing plate has air outlet holes for discharging the gas in the air flow channel. The pressure sensor is used to read the pressure between the lower surface of the pressing plate and the upper surface of the article to be measured. The displacement sensor includes a fixed end and a measuring end. The fixed end is disposed on the pressing plate, and the measuring end can abut against the support member. When it is necessary to measure the thickness of the article to be measured, the pressing plate can be controlled to press down so that the pressing plate contacts the upper surface of the article to be measured. The pressure sensor can read the pressure between the lower surface of the pressing plate and the upper surface of the article to be measured. After the reading of the pressure sensor reaches a preset value, the reading of the displacement sensor is read, and the measured value of the thickness of the article to be measured is obtained based on the reading of the displacement sensor. In addition, air outlet holes are provided on the lower surface of the pressing plate, and the air outlet holes can discharge the gas entering the air flow channel to the space between the lower surface of the pressing plate and the upper surface of the article to be measured to avoid adhesion between the two, and the cost is lower compared with the scheme of using an anti-adhesion pressing plate. Description of the Drawings

[0022] Figure 1 is a schematic view of a partial structure of the thickness measuring mechanism in an embodiment of the present utility model Figure 1 ;

[0023] Figure 2 is Figure 1 an enlarged view of part A in

[0024] Figure 3 is a schematic structural view of the thickness measuring mechanism in an embodiment of the present utility model;

[0025] Figure 4 is a schematic view of a partial structure of the thickness measuring mechanism in an embodiment of the present utility model Figure 2 .

[0026] In the figure:

[0027] 100, article to be measured;

[0028] 1, frame; 11, first guide rail; 12, second guide rail;

[0029] 2, support member; 21, support platform; 22, reference block; 23, limiting rod;

[0030] 3, pressing plate; 31, air outlet hole; 32, air inlet hole;

[0031] 4, pressure sensor;

[0032] 5, displacement sensor; 51, fixed end; 52, measuring end;

[0033] 6. In-place detection mechanism;

[0034] 71. Pressing plate driving member; 72. Support driving member;

[0035] 8. Buffer block. Detailed implementation manner

[0036] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. In addition, it should be noted that, for the sake of convenience of description, only the parts related to the present utility model are shown in the drawings, rather than all the structures.

[0037] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected", and "fixed" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0038] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above", and "on" the second feature includes that the first feature is directly above and obliquely above the second feature, or only indicates that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below", and "under" the second feature includes that the first feature is directly below and obliquely below the second feature, or only indicates that the horizontal height of the first feature is lower than that of the second feature.

[0039] In the description of this embodiment, the orientation or positional relationship such as "above", "below", "left", and "right" is based on the orientation or positional relationship shown in the drawings, and is only for the convenience of description and simplifying the operation, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0040] The prior art provides a cell pressurized thickness detection device. Among them, the cell to be detected is placed on a jig, and a reference block is provided on the jig. In addition, an upper pressure plate, a pressure sensor provided on the upper pressure plate, and a displacement sensor are also provided. When measuring the thickness, the air cylinder drives the upper pressure plate to move downward and abut against the upper surface of the cell. The pressure sensor is used to obtain the pressure applied by the upper pressure plate to the cell. When the reading of the pressure sensor reaches a preset value, the displacement sensor has already contacted the reference block and generated a certain displacement, and the thickness measurement value of the cell is obtained based on the reading of the displacement sensor. In addition, in order to prevent the upper pressure plate from sticking to the surface of the cell, the upper pressure plate uses an anti-sticking pressure plate. However, the surface of the anti-sticking pressure plate needs to be made of an anti-sticking material, resulting in a high cost.

[0041] In view of the above problems, the present embodiment provides a thickness measurement mechanism to solve the problem in the prior art that the upper pressure plate needs to use an anti-sticking pressure plate, and the surface of the anti-sticking pressure plate needs to be made of an anti-sticking material, resulting in a high cost. It can be used in the technical field of cell thickness measurement.

[0042] Refer to Figures 1 - 4 , the thickness measurement mechanism is used to measure the thickness of the item to be measured 100. In this embodiment, the item to be measured 100 is a cell. In other embodiments, the item to be measured 100 can also be other structures. The thickness measurement mechanism includes a frame 1, a support member 2, a pressure plate 3, a pressure sensor 4, and a displacement sensor 5. The support member 2 is provided on the frame 1 and is used to support the item to be measured 100; the pressure plate 3 is slidably provided on the frame 1 in the vertical direction, and the lower surface of the pressure plate 3 can contact the upper surface of the item to be measured 100. The pressure plate 3 has an air flow channel for gas to enter, and the lower surface of the pressure plate 3 has air outlet holes 31 for the gas in the air flow channel to be discharged; the pressure sensor 4 is used to read the pressure between the lower surface of the pressure plate 3 and the upper surface of the item to be measured 100. Specifically, the pressure sensor 4 can be provided between the frame 1 and the pressure plate 3 and is used to directly read the magnitude of the pressure between the frame 1 and the pressure plate 3. The sum of this value and the gravity of the pressure plate 3 can obtain the magnitude of the pressure applied by the upper surface of the item to be measured 100 to the lower surface of the pressure plate 3, so as to obtain the pressure between the lower surface of the pressure plate 3 and the upper surface of the item to be measured 100. The displacement sensor 5 includes a fixed end 51 and a measurement end 52. The fixed end 51 is provided on the pressure plate 3, and the measurement end 52 can abut against the support member 2.

[0043] When it is necessary to measure the thickness of the item to be measured 100, the pressure plate 3 can be controlled to press down so that the pressure plate 3 contacts the upper surface of the item to be measured 100. The pressure sensor 4 can read the pressure between the lower surface of the pressure plate 3 and the upper surface of the item to be measured 100. After the reading of the pressure sensor 4 reaches a preset value, by reading the reading of the displacement sensor 5, the measurement value of the thickness of the item to be measured 100 is obtained based on the reading of the displacement sensor 5.

[0044] Specifically, a reference value can be set, and the measured value of the thickness of the article 100 to be measured is obtained by subtracting the reference value from the reading of the displacement sensor 5. In this embodiment, the support member 2 includes a support platform 21 and a reference block 22. The support platform 21 is used to support the article 100 to be measured, and the measuring end 52 of the displacement sensor 5 can abut against the reference block 22. When the article 100 to be measured is not placed on the support platform 21, as the pressing plate 3 is pressed down, the lower surface of the pressing plate 3 contacts the support platform 21, and when the reading of the pressure sensor 4 reaches a preset value, the measuring end 52 of the displacement sensor 5 abuts against the upper surface of the reference block 22. At this time, the reading of the displacement sensor 5 is the reference value. After the article 100 to be measured is installed on the support platform 21, when the reading of the pressure sensor 4 reaches a preset value, the thickness of the article 100 to be measured is the reading of the displacement sensor 5 minus the reference value, which is convenient for reading. In addition, different reference blocks 22 can be used as needed to adjust the height of the upper surface of the reference block 22 relative to the support platform 21, that is, to adjust the height difference between the upper surface of the article 100 to be measured and the upper surface of the reference block 22.

[0045] In addition, air outlet holes 31 are provided on the lower surface of the pressing plate 3. The air outlet holes 31 can discharge the gas entering the air flow channel to the space between the lower surface of the pressing plate 3 and the upper surface of the article 100 to be measured, so as to avoid adhesion between the two, and the cost is relatively low compared with the scheme of using an anti-sticking pressing plate.

[0046] Continue to refer to Figures 1 - 4 , an air inlet hole 32 is provided on the side wall of the pressing plate 3. The air inlet hole 32 is communicated with the air flow channel and is used to connect to a gas source. External gas can enter the air flow channel through the air inlet hole 32. Setting the air inlet hole 32 on the side wall of the pressing plate 3 facilitates the connection of the pressing plate 3 with structures such as an air inlet pipe.

[0047] Continue to refer to Figures 1 - 4 , a plurality of air outlet holes 31 are provided, so that gas is sprayed from different positions to the space between the lower surface of the pressing plate 3 and the upper surface of the article 100 to be measured through the plurality of air outlet holes 31 to improve the anti-sticking effect. In this embodiment, the plurality of air outlet holes 31 are arranged in an array.

[0048] Continue to refer to Figures 1 - 4 , the thickness measuring mechanism further includes a pressing plate driving member 71 for driving the pressing plate 3 to reciprocate vertically relative to the frame 1, so that the pressing plate 3 can be driven to move vertically by the pressing plate driving member 71. Among them, the pressing plate driving member 71 can be a cylinder, and has a cylinder fixed end connected to the frame 1 and a telescopic end connected to the pressing plate 3. The telescopic end can reciprocally extend and retract vertically relative to the cylinder fixed end. In addition, the pressure sensor 4 can be arranged between the telescopic end and the pressing plate 3. As an alternative solution, the pressing plate driving member 71 can also be a motor, and the motor drives the pressing plate 3 to move vertically through a gear-rack structure.

[0049] Continue to refer to Figures 1 - 4 As shown in Figures 1 - 4 , the rack 1 has a first guide rail 11 extending in the horizontal direction. The support member 2 is slidably engaged with the first guide rail 11 so that the support member 2 can move horizontally relative to the rack 1. By sliding the support member 2 along the first guide rail 11, the article 100 to be measured can be driven to move under the pressing plate 3 or moved out from under the pressing plate 3. In addition, through the sliding fit between the first guide rail 11 and the support member 2, the stability of the support member 2 sliding relative to the rack 1 can be improved.

[0050] Optionally, the thickness measuring mechanism further includes a support driving member 72 for driving the support member 2 to reciprocate horizontally relative to the rack 1, so that the support member 2 can be driven to move horizontally relative to the rack 1 by the support driving member 72. Among them, the support driving member 72 can be a cylinder and has a cylinder fixed end connected to the rack 1 and a telescopic end connected to the support member 2. The telescopic end can reciprocally extend and retract horizontally relative to the cylinder fixed end. As an alternative solution, the support driving member 72 can also be a motor, and the motor drives the support member 2 to move horizontally through a gear and rack structure.

[0051] Optionally, the rack 1 further has a second guide rail 12 extending in the vertical direction. The pressing plate 3 is slidably engaged with the second guide rail 12, thereby improving the stability of the pressing plate 3 sliding relative to the rack 1.

[0052] Continue to refer to Figures 1 - 4 As shown in Figures 1 - 4 , the thickness measuring mechanism further includes a position detection mechanism 6 provided on one side of the first guide rail 11. The position detection mechanism 6 has a transmitting end and a receiving end. The transmitting end is used to emit light, and the receiving end is used to receive the light emitted by the transmitting end and reflected by the support member 2. The thickness measuring mechanism has a thickness measuring station. When the support member 2 moves along the first guide rail 11 to the thickness measuring station, the support member 2 and the article 100 to be measured are located under the pressing plate 3, and at this time, the thickness measurement operation can be performed. Among them, the position detection mechanism 6 can be used to detect whether the support member 2 has reached the thickness measuring station and send a first in-place signal when it detects that the support member 2 is in place. After receiving the first in-place signal, the controller automatically controls the pressing plate driving member 71 to work to drive the pressing plate 3 to press down, thereby realizing the thickness measurement. Or, the position detection mechanism 6 is provided outside the thickness measuring station and is used to detect whether the support member 2 has reached the initial position. When the support member 2 reaches the initial position, a second in-place signal is sent. After receiving the second in-place signal, the controller automatically controls the support driving member 72 to work to convey the support member 2 to the thickness measuring station, and then the controller controls the pressing plate driving member 71 to work to drive the pressing plate 3 to press down, thereby realizing the thickness measurement.

[0053] Optionally, the thickness measuring mechanism has a plurality of thickness measuring stations, and a pressing plate 3, a pressing plate driving member 71, a pressure sensor 4, and a displacement sensor 5 are correspondingly arranged at each thickness measuring station. In this way, it is convenient for the thickness measuring mechanism to measure the thicknesses of a plurality of articles to be measured 100 simultaneously, or to repeatedly measure the thickness of the same article to be measured 100 to eliminate errors.

[0054] Continue to refer to Figures 1 - 4 , a plurality of displacement sensors 5 are provided, a plurality of reference blocks 22 are provided, and the upper surfaces of the plurality of reference blocks 22 are at the same height relative to the support platform 21. The measuring ends 52 of the plurality of displacement sensors 5 can be in contact with the plurality of reference blocks 22 one by one. When measuring the thickness of the article to be measured 100, the thicknesses of different positions of the article to be measured 100 can be detected by the plurality of displacement sensors 5, so as to facilitate the user to judge the flatness of the upper surface of the article to be measured 100 according to the measurement data.

[0055] Continue to refer to Figures 1 - 4 , the support member 2 further includes a limiting rod 23 arranged on the support platform 21. The limiting rod 23 can be in contact with the lower surface of the pressing plate 3 in the vertical direction. Such a setting can limit the maximum movement position of the pressing plate 3 to prevent the support platform 21 or the article to be measured 100 from being damaged due to excessive pressure. Specifically, in this embodiment, when there is no article to be measured 100 on the support platform 21, when the lower surface of the pressing plate 3 contacts the support platform 21 and the reading of the pressure sensor 4 reaches the preset value, the limiting rod 23 just contacts the lower surface of the pressing plate 3.

[0056] Continue to refer to Figures 1 - 4 , the pressing plate 3 needs to be repaired after working for a certain period of time. At this time, the pressing plate 3 has a risk of falling. In this regard, the frame 1 is provided with a buffer block 8, and the buffer block 8 is located below the pressing plate 3, so as to prevent the pressing plate 3 from being damaged due to falling.

[0057] Obviously, the above embodiments of the present invention are merely examples for clearly explaining the present invention, and are not limitations on the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included in the protection scope of the claims of the present invention.

Claims

1. Thickness measuring mechanism, used for measuring the thickness of an item to be measured (100), characterized in that, Comprising: A frame (1); A support member (2) provided on the frame (1) and for supporting the article to be measured (100); A pressing plate (3) slidably provided on the frame (1) in the vertical direction, the lower surface of the pressing plate (3) being capable of contacting the upper surface of the article to be measured (100), the pressing plate (3) having an air flow channel for gas to enter, and the lower surface of the pressing plate (3) having air outlet holes (31) for discharging the gas in the air flow channel; A pressure sensor (4) for reading the pressure between the lower surface of the pressing plate (3) and the upper surface of the article to be measured (100); A displacement sensor (5) including a fixed end (51) and a measuring end (52), the fixed end (51) being provided on the pressing plate (3), and the measuring end (52) being capable of abutting against the support member (2).

2. The thickness measuring mechanism according to claim 1, wherein An air inlet hole (32) is formed in the side wall of the pressing plate (3), and the air inlet hole (32) communicates with the air flow channel and is used for connecting to a gas source.

3. The thickness measuring mechanism according to claim 1, characterized in that, A plurality of the air outlet holes (31) are provided.

4. The thickness measuring mechanism according to any one of claims 1-3, characterized in that, Further included is a pressing plate driving member (71) for driving the pressing plate (3) to reciprocate in the vertical direction relative to the frame (1).

5. The thickness measuring mechanism according to any one of claims 1-3, characterized in that, The frame (1) has a first guide rail (11) extending in the horizontal direction, and the support member (2) is slidably engaged with the first guide rail (11).

6. The thickness measuring mechanism according to claim 5, characterized in that Further included is a position detection mechanism (6) provided on one side of the first guide rail (11), the position detection mechanism (6) having a transmitting end and a receiving end, the transmitting end being for emitting light, and the receiving end being for receiving the light emitted by the transmitting end and reflected by the support member (2).

7. The thickness measuring mechanism according to any one of claims 1-3, characterized in that, The support member (2) includes a support platform (21) and a reference block (22), the support platform (21) being for supporting the article to be measured (100), and the measuring end (52) of the displacement sensor (5) being capable of abutting against the reference block (22).

8. The thickness measuring mechanism according to claim 7, characterized in that, A plurality of the displacement sensors (5) are provided, a plurality of the reference blocks (22) are provided, and the upper surfaces of the plurality of reference blocks (22) are at the same height relative to the support platform (21), and the measuring ends (52) of the plurality of displacement sensors (5) can abut against the plurality of reference blocks (22) one by one.

9. The thickness measuring mechanism according to claim 7, characterized in that, The support member (2) further includes a limiting rod (23) provided on the support platform (21), and the limiting rod (23) can abut against the lower surface of the pressing plate (3) in the vertical direction.

10. The thickness measuring mechanism according to any one of claims 1-3, characterized in that, A buffer block (8) is provided on the frame (1), and the buffer block (8) is located below the pressing plate (3).

Images