An online thickness measurement mechanism

Abstract

This invention discloses an online thickness measurement mechanism, comprising a frame, a roller, an upper thickness sensor, a horizontal moving mechanism for the upper thickness sensor, a lower thickness sensor, a horizontal moving mechanism for the lower thickness sensor, and a synchronous drive mechanism. The roller is rotatably mounted on both sides of the frame. The upper thickness sensor is driven by the horizontal moving mechanism to move back and forth horizontally, and the lower thickness sensor is also driven by the same mechanism to move back and forth horizontally. Both the upper and lower thickness sensor horizontal moving mechanisms are connected to and synchronously driven by the synchronous drive mechanism. This invention achieves thickness detection along the width of the electrode sheet by moving two thickness sensors back and forth in opposite directions along the width of the electrode sheet, thereby improving the accuracy of electrode sheet thickness measurement.

Description

Technical Field

[0001] This utility model relates to a thickness measuring mechanism, and more particularly to an online thickness measuring mechanism, belonging to the field of lithium battery processing technology. Background Technology

[0002] In the lithium battery production process, there is a rolling process that compacts the electrode sheets, increasing their density and thus improving the cell's energy density. The thickness H of the rolled electrode sheets is crucial, affecting the alignment of subsequent winding processes and the cell's thickness. Therefore, it is necessary to measure the thickness of the rolled electrode sheets. Electrode thickness measurement uses two laser sensors, positioned on the top and bottom of the electrode sheet respectively. Laser sensor A measures the distance La from the top surface of the electrode sheet, and laser sensor B measures the distance Lb. The distance between laser sensors A and B is L. Therefore, the electrode thickness H = L - La - Lb. Traditional thickness measurement mechanisms, where the two laser sensors are fixed to the top and bottom of the electrode sheet by brackets, can only measure the thickness along the length of the electrode sheet. When the electrode sheet is wide, the thickness variation along the width is also significant, which traditional thickness measurement mechanisms cannot detect, resulting in low accuracy in actual electrode thickness measurement. Utility Model Content

[0003] The technical problem to be solved by this utility model is to provide an online thickness measurement mechanism to improve the accuracy of thickness measurement of wide-width lithium battery electrode sheets.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is as follows: An online thickness measurement mechanism includes a frame, a roller, an upper thickness sensor, a horizontal moving mechanism for the upper thickness sensor, a lower thickness sensor, a horizontal moving mechanism for the lower thickness sensor, and a synchronous drive mechanism. The two ends of the roller are rotatably mounted on the two sides of the frame. The upper thickness sensor is mounted on the horizontal moving mechanism for the upper thickness sensor and is driven by the horizontal moving mechanism to move back and forth in the horizontal direction. The lower thickness sensor is mounted on the horizontal moving mechanism for the lower thickness sensor and is driven by the horizontal moving mechanism to move back and forth in the horizontal direction. The upper and lower thickness sensors are arranged vertically opposite each other and located on the upper and lower sides of the roller. Both the horizontal moving mechanisms for the upper and lower thickness sensors are connected to the synchronous drive mechanism and are driven synchronously by the synchronous drive mechanism.

[0005] Furthermore, the upper thickness sensor horizontal moving mechanism and the lower thickness sensor horizontal moving mechanism respectively include a horizontal frame, an X-axis slider, a Y-axis slider, a synchronous belt, a first synchronous wheel, and a second synchronous wheel. The upper or lower thickness sensor is mounted on the X-axis slider, which is slidably mounted within the horizontal frame and can slide back and forth in the left-right direction. The Y-axis slider is slidably mounted on the X-axis slider and can slide back and forth in the front-back direction. The Y-axis slider is connected to the synchronous belt. The first and second synchronous wheels are rotatably mounted at both ends of the horizontal frame, and the synchronous belt is mounted on the first and second synchronous wheels.

[0006] Furthermore, the upper thickness sensor horizontal moving mechanism and the lower thickness sensor horizontal moving mechanism also include two X-axis slide rails. The two X-axis slide rails are respectively arranged along the left and right directions of the frame and fixed on the front and rear inner walls of the horizontal frame. The front and rear sides of the X-axis slider are respectively slidably arranged on the two X-axis slide rails.

[0007] Furthermore, the upper thickness sensor horizontal moving mechanism and the lower thickness sensor horizontal moving mechanism also include two Y-axis slide rails. The two Y-axis slide rails are arranged on the X-axis slider along the front-back direction of the frame, and the Y-axis slider is slidably arranged on the two Y-axis slide rails.

[0008] Furthermore, the Y-axis slider is connected to the timing belt via a rotating pin. The rotating pin includes a pin base and a pin clamp. One end of the pin clamp is rotatably mounted on one end of the pin base, and the other end of the pin clamp is clamped onto the timing belt and locked in place by bolts. The other end of the pin base is fixed to the Y-axis slider.

[0009] Furthermore, the synchronous drive mechanism includes a first transmission wheel, a second transmission wheel, a first transmission belt, a second transmission belt, a first drive wheel, a second drive wheel, a drive spindle, and a drive motor. The first transmission wheel is coaxially connected to the second synchronous wheel of the upper thickness sensor horizontal movement mechanism, and the second transmission wheel is coaxially connected to the second synchronous wheel of the lower thickness sensor horizontal movement mechanism. The first drive wheel and the second drive wheel are respectively fixed to the upper and lower ends of the drive spindle. The drive spindle is rotatably mounted on the outside of the frame, and the lower end of the drive spindle is connected to the drive motor and driven to rotate by the drive motor. The first transmission belt is mounted on the first transmission wheel and the first drive wheel, and the second transmission belt is mounted on the second transmission wheel and the second drive wheel.

[0010] Furthermore, an upper side shaft bracket is provided at the upper end of the side of the frame, and a lower side shaft bracket is provided at the lower end of the side of the frame. The upper end of the drive spindle is rotatably mounted on the upper side shaft bracket, and the lower end of the drive spindle is rotatably mounted on the lower side shaft bracket.

[0011] Furthermore, the drive motor is a stepper motor.

[0012] Compared with the prior art, this utility model has the following advantages and effects: This utility model discloses an online thickness measurement mechanism, which realizes the thickness detection in the width direction of the electrode by moving two thickness sensors back and forth along the width of the electrode, thereby improving the accuracy of electrode thickness measurement; it adopts a decoupled structure of two sliders on the X and Y axes in conjunction with a synchronous belt for back and forth driving, and the drive motor only needs to rotate in the same direction, without the need for the motor to rotate forward and backward like the conventional lead screw structure, which reduces the cost of the motor, and the structure is simple and low cost due to synchronous driving by a single motor. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of an online thickness measuring mechanism according to this utility model.

[0014] Figure 2 This is a schematic diagram of the horizontal moving mechanism of the upper thickness sensor of this utility model.

[0015] Figure 3 This is a side view of the horizontal moving mechanism of the upper thickness sensor of this utility model. Detailed Implementation

[0016] To elaborate on the technical solutions adopted by this utility model to achieve the intended technical objectives, the technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Furthermore, the technical means or technical features in the embodiments of this utility model can be replaced without creative effort. The utility model will be described in detail below with reference to the accompanying drawings and embodiments.

[0017] like Figure 1 As shown, this utility model discloses an online thickness measurement mechanism, comprising a frame 1, a roller 2, an upper thickness sensor 3, an upper thickness sensor horizontal moving mechanism, a lower thickness sensor 4, and a synchronous drive mechanism. The roller 2 is rotatably mounted on both sides of the frame 1, and lithium battery electrodes move back and forth from the upper side of the roller 2. The upper thickness sensor 3 is mounted on the upper thickness sensor horizontal moving mechanism and is driven by the mechanism to move back and forth horizontally. The lower thickness sensor 4 is mounted on the lower thickness sensor horizontal moving mechanism and is driven by the mechanism to move back and forth horizontally. The upper and lower thickness sensors 3 and 4 are vertically opposite each other and located on the upper and lower sides of the roller, moving synchronously left and right. Both the upper and lower thickness sensor horizontal moving mechanisms are connected to the synchronous drive mechanism and are driven synchronously by it.

[0018] like Figure 2 and Figure 3 As shown, the upper thickness sensor horizontal moving mechanism and the lower thickness sensor horizontal moving mechanism respectively include a horizontal frame 5, an X-axis slider 6, a Y-axis slider 7, a synchronous belt 8, a first synchronous wheel 9, and a second synchronous wheel 10. The upper thickness sensor 3 or the lower thickness sensor 4 is mounted on the X-axis slider 6. The X-axis slider 6 is slidably mounted within the horizontal frame 5 and can slide back and forth in the left-right direction. The Y-axis slider 7 is slidably mounted on the X-axis slider 6 and can slide back and forth in the front-back direction. The Y-axis slider 7 is connected to the synchronous belt 8. The first synchronous wheel 9 and the second synchronous wheel 10 are rotatably mounted at both ends of the horizontal frame 5. The synchronous belt 8 is mounted on the first synchronous wheel 9 and the second synchronous wheel 10.

[0019] The upper thickness sensor horizontal moving mechanism and the lower thickness sensor horizontal moving mechanism also include two X-axis slide rails 11. The two X-axis slide rails 11 are respectively set along the left and right directions of the frame 1 and fixed on the front and rear inner walls of the horizontal frame 5. The front and rear sides of the X-axis slider 6 are respectively slidably set on the two X-axis slide rails 11.

[0020] The upper thickness sensor horizontal moving mechanism and the lower thickness sensor horizontal moving mechanism also include two Y-axis slide rails 12. The two Y-axis slide rails 12 are arranged on the X-axis slider 6 along the front and rear direction of the frame 1, and the Y-axis slider 7 is slidably arranged on the two Y-axis slide rails 12.

[0021] Y-axis slider 7 is connected to synchronous belt 8 via rotating pin 13. Rotating pin 13 includes pin base and pin clamp. One end of pin clamp is rotatably set at one end of pin base, and the other end of pin clamp is clamped on synchronous belt 8 and locked and fixed by bolts. The other end of pin base is fixed on Y-axis slider 7.

[0022] The synchronous drive mechanism includes a first transmission wheel 14, a second transmission wheel 15, a first transmission belt 16, a second transmission belt 17, a first drive wheel 18, a second drive wheel 19, a drive spindle 20, and a drive motor 21. The first transmission wheel 14 is coaxially connected to the second synchronous wheel 10 of the upper thickness sensor horizontal movement mechanism, and the second transmission wheel 15 is coaxially connected to the second synchronous wheel 10 of the lower thickness sensor horizontal movement mechanism. The first drive wheel 18 and the second drive wheel 19 are respectively fixed to the upper and lower ends of the drive spindle 20. The drive spindle 20 is rotatably mounted on the outside of the frame 1, and the lower end of the drive spindle 20 is connected to the drive motor 21 and driven to rotate by the drive motor 21. The first transmission belt 16 is mounted on the first transmission wheel 14 and the first drive wheel 18, and the second transmission belt 17 is mounted on the second transmission wheel 15 and the second drive wheel 19.

[0023] An upper side shaft bracket 22 is provided on the upper end of the side of the frame 1, and a lower side shaft bracket 23 is provided on the lower end of the side of the frame 1. The upper end of the drive spindle 20 is rotatably mounted on the upper side shaft bracket 22, and the lower end of the drive spindle 20 is rotatably mounted on the lower side shaft bracket 23.

[0024] The drive motor 21 is a stepper motor.

[0025] This utility model discloses the working principle of an online thickness measuring mechanism as follows: A drive motor 21 drives a drive shaft 20 to rotate. The drive shaft 20 synchronously drives 14 first transmission wheels and 15 second transmission wheels 15 to rotate via a first drive wheel 18, a second drive wheel 19, a first transmission belt 16, and a second transmission belt 17. These first and second transmission wheels 14, in turn, drive the synchronous belts 8 of the upper and lower thickness sensor horizontal movement mechanisms. The thickness sensor mounted on the X-axis slider 6 moves left and right along the synchronous belt 8. When it reaches the synchronous wheel position, the transmission pin 13 moves back and forth. At this time, through the decoupling structure of the X-axis slider 6 and the Y-axis slider 7, the back and forth movement of the transmission pin 13 does not drive the X-axis slider 6, only achieving left and right drive of the X-axis slider 6. With this structure, the drive motor 21 only needs to rotate continuously in the forward direction, simplifying control, reducing motor design requirements, and lowering design costs.

[0026] This utility model discloses an online thickness measurement mechanism. By moving two thickness sensors back and forth along the width of the electrode sheet, the thickness of the electrode sheet in the width direction can be detected, thereby improving the accuracy of electrode sheet thickness measurement. The mechanism uses a decoupled structure of two sliders on the X and Y axes in conjunction with a synchronous belt for back-and-forth driving. The drive motor only needs to rotate in the same direction, eliminating the need for the motor to rotate in both directions as in conventional lead screw structures, thus reducing motor costs. Furthermore, the mechanism is simple in structure and low in cost because it is driven synchronously by a single motor.

[0027] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make some modifications or alterations to the above-disclosed technical content to create equivalent embodiments without departing from the scope of the present utility model's technical solution. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments without departing from the scope of the present utility model's technical solution, based on the technical essence of the present utility model and within the spirit and principles of the present utility model, shall still fall within the protection scope of the present utility model's technical solution.

Claims

1. An on-line thickness measuring mechanism characterized by: The application relates to a thickness measuring device, which comprises a frame, a roller, an upper thickness sensor, an upper thickness sensor horizontal moving mechanism, a lower thickness sensor, a lower thickness sensor horizontal moving mechanism and a synchronous driving mechanism, both ends of the roller are rotatably arranged on the two side frames, the upper thickness sensor is arranged on the upper thickness sensor horizontal moving mechanism and is driven by the upper thickness sensor horizontal moving mechanism to move back and forth along the horizontal direction, the lower thickness sensor is arranged on the lower thickness sensor horizontal moving mechanism and is driven by the lower thickness sensor horizontal moving mechanism to move back and forth along the horizontal direction, the upper thickness sensor and the lower thickness sensor are oppositely arranged and located on the upper and lower sides of the roller, and the upper thickness sensor horizontal moving mechanism and the lower thickness sensor horizontal moving mechanism are connected with the synchronous driving mechanism and are synchronously driven by the synchronous driving mechanism.

2. An on-line thickness measuring mechanism according to claim 1, characterized in that: The upper thickness sensor horizontal moving mechanism and the lower thickness sensor horizontal moving mechanism respectively comprise a horizontal frame, an X-axis slider, a Y-axis slider, a synchronous belt, a first synchronous wheel and a second synchronous wheel, the upper thickness sensor or the lower thickness sensor is arranged on the X-axis slider, the X-axis slider is slidably arranged in the horizontal frame and can slide back and forth along the left-right direction, the Y-axis slider is slidably arranged on the X-axis slider and can slide back and forth along the front-rear direction, the Y-axis slider is connected with the synchronous belt, and the first synchronous wheel and the second synchronous wheel are rotatably arranged at the two ends of the horizontal frame, and the synchronous belt is arranged on the first synchronous wheel and the second synchronous wheel.

3. An on-line thickness measuring mechanism according to claim 2, wherein: The upper thickness sensor horizontal moving mechanism and the lower thickness sensor horizontal moving mechanism further comprise two X-axis sliding rails, the two X-axis sliding rails are arranged along the left-right direction of the frame and are fixed on the inner walls of the front-rear sides of the horizontal frame, and the front-rear sides of the X-axis slider are slidably arranged on the two X-axis sliding rails.

4. An on-line thickness measuring mechanism according to claim 2, wherein: The upper thickness sensor horizontal moving mechanism and the lower thickness sensor horizontal moving mechanism further comprise two Y-axis sliding rails, the two Y-axis sliding rails are arranged along the front-rear direction of the frame on the X-axis slider, and the Y-axis slider is slidably arranged on the two Y-axis sliding rails.

5. An on-line thickness measuring mechanism according to claim 2, wherein: The Y-axis slider is connected with the synchronous belt through a rotating pin shaft, the rotating pin shaft comprises a pin shaft base and a pin shaft clamp, one end of the pin shaft clamp is rotatably arranged at one end of the pin shaft base, the other end of the pin shaft clamp is clamped on the synchronous belt and is fixed through a bolt, and the other end of the pin shaft base is fixed on the Y-axis slider.

6. An on-line thickness measuring mechanism according to claim 2, wherein: The synchronous driving mechanism comprises a first transmission wheel, a second transmission wheel, a first transmission belt, a second transmission belt, a first driving wheel, a second driving wheel, a driving main shaft and a driving motor, the first transmission wheel is coaxially connected with the second synchronous wheel of the upper thickness sensor horizontal moving mechanism, the second transmission wheel is coaxially connected with the second synchronous wheel of the lower thickness sensor horizontal moving mechanism, the first driving wheel and the second driving wheel are respectively fixed on the upper end and the lower end of the driving main shaft, the driving main shaft is rotatably arranged outside the frame, the lower end of the driving main shaft is connected with the driving motor and is driven to rotate by the driving motor, the first transmission belt is arranged on the first transmission wheel and the first driving wheel, and the second transmission belt is arranged on the second transmission wheel and the second driving wheel.

7. An on-line thickness measuring mechanism according to claim 6, wherein: The upper end of the rack side is provided with an upper shaft support, and the lower end of the rack side is provided with a lower shaft support.

8. An on-line thickness measuring mechanism according to claim 6, wherein: The driving motor is a stepping motor.

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