Clearance control mechanism of mechanical structure

Abstract

The utility model belongs to the technical field of roller presses, and particularly relates to a clearance control mechanism of a mechanical structure. The device comprises a rack, and a lower pressing roller assembly is installed on the rack; the upper compression roller assemblies are installed above the lower compression roller assemblies at intervals, and driving devices are connected to the upper compression roller assemblies so as to drive the upper compression roller assemblies to be close to or away from the lower compression roller assemblies; the gap control device comprises a first block, a second block and an adjusting device, the first block and the second block are installed on the lower press roller assembly and the upper press roller assembly respectively, the distance between the first block and the second block is smaller than that between the lower press roller assembly and the upper press roller assembly, and the output end of the adjusting device is connected with the first block or the second block so as to change the distance between the first block and the second block. The feedback device comprises a stop block and a feedback sensor which are respectively arranged on the lower compression roller assembly and the upper compression roller assembly; and an inductive probe of the feedback sensor is arranged opposite to the stop block. The roller press distance adjusting device is used for solving the problems that roller press distance adjusting operation is complex and verification is troublesome.

Description

Technical Field

[0001] The utility model belongs to the technical field of roller presses, and in particular relates to a mechanical structure gap control mechanism. Background Art

[0002] The thickness of lithium battery pole sheets significantly impacts battery performance, resulting in extremely stringent thickness precision requirements. Rolling is a key process for controlling the thickness of lithium battery pole sheets. In a roller press, the pressure and gap between the upper and lower rollers directly determine the degree of compaction and ultimate thickness of the pole sheet. Of course, the optimal thickness of pole sheets varies with different materials, requiring continuous testing and verification.

[0003] Generally speaking, the thickness of battery electrodes is at the micron level. To ensure the accuracy of the electrode thickness, the detection and control accuracy must be at this level. However, the pressure adjustment between the upper and lower rollers in the current roller press still relies on manual adjustment. In the face of different products and changes in working conditions, it is necessary to repeatedly readjust the distance between the upper and lower rollers, repeatedly debug and verify, and the adjustment operation is cumbersome and inconvenient. In addition, the current precision requirements for roller presses are high, and the adjustment is difficult. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a mechanical structure gap control mechanism for solving the problem that the roller press spacing adjustment operation is complicated and difficult to verify.

[0005] The technical solution of the utility model to solve the above technical problems is as follows: a mechanical structure gap control mechanism, which includes: a frame;

[0006] A lower pressure roller assembly is installed on the frame;

[0007] An upper pressure roller assembly is installed above the lower pressure roller assembly at intervals, and a driving device is connected to the upper pressure roller assembly to drive the upper pressure roller assembly to move closer to or away from the lower pressure roller assembly;

[0008] A gap control device, comprising a block 1, a block 2, and an adjusting device, wherein the block 1 and the block 2 are respectively mounted on the lower pressure roller assembly and the upper pressure roller assembly, and the spacing between the block 1 and the block 2 is smaller than the spacing between the lower pressure roller assembly and the upper pressure roller assembly. The output end of the adjusting device is connected to the block 1 or the block 2 to change the spacing between the block 1 and the block 2.

[0009] The feedback device comprises a stopper and a feedback sensor respectively arranged on the lower pressure roller assembly and the upper pressure roller assembly, wherein the sensing probe of the feedback sensor is arranged opposite to the stopper.

[0010] Compared with the existing technology, the above technical solution has the following beneficial effects:

[0011] By setting up a sensor in the feedback device used in conjunction with the gap control device, firstly, the sensor can more intuitively reflect the gap information through numerical display, making the gap control device more intuitive in adjusting the distance between block one and block two; secondly, the change amount after each adjustment is fed back in real time by the sensor, and after being sent to the subsequent control system, the adjustment amount of the adjustment device can be adjusted again according to the change amount, thereby forming a control closed loop to ensure that the amount of each adjustment can quickly meet the corresponding requirements.

[0012] Based on the above technical solution, the embodiment of the present application can also be improved as follows:

[0013] In one embodiment, a guide groove is provided in the frame in the same direction as the movement direction of the driving device, and an upper roller guide mechanism connected between the driving device and the upper pressure roller assembly is provided in the guide groove.

[0014] In one embodiment, the upper pressure roller assembly and the lower pressure roller assembly have the same structure, both including a roller body and an axle seat connected to both ends of the roller body, and the axle seat of the upper pressure roller assembly is slidably connected to the guide groove through the upper roller guide mechanism.

[0015] In one embodiment, the first block and the second block are both wedge-shaped blocks, and the inclined surfaces of the two wedge-shaped blocks are arranged opposite to each other.

[0016] In one embodiment, the adjustment device comprises:

[0017] a guide block fixed to the frame, the block being slidably connected to the guide block;

[0018] The output end of the lead screw driving unit is connected to the block 1 and is used to drive the block 1 to slide on the guide block.

[0019] In one embodiment, the slope of the wedge block is not greater than the static friction coefficient μ of the wedge block.

[0020] In one embodiment, a plurality of limit sensors are provided on the guide block at intervals along the axial direction of the lead screw drive unit, and a sensor baffle corresponding to the limit sensors is provided on the block 1 to limit the movement range of the block 1.

[0021] In one embodiment, the screw drive unit comprises:

[0022] a lead screw on which a lead screw nut connected to the block is mounted;

[0023] The output end of the screw reducer is connected to one end of the screw to drive the screw to rotate.

[0024] In one embodiment, a control unit is further included, which is connected to the regulating device and the sensor and is used to control the output of the regulating device according to the feedback value of the sensor.

[0025] One or more technical solutions provided in the embodiments of this application have at least the following technical effects or advantages:

[0026] 1. Through the cooperation of feedback sensor and stopper, the gap value between the two roller assemblies is displayed in real time, which is convenient for subsequent adjustment.

[0027] 2. The measurement value of the feedback sensor can be calculated by the control unit, and then the gap control device is controlled in real time to adjust the distance between the two pressure roller assemblies, and the closed-loop control of the roller gap value is achieved through the feedback sensor.

[0028] 3. The use of wedge blocks with lower inclination can not only better and more accurately adjust the distance between the two roller assemblies and make the control more precise, but also the two wedge blocks can achieve friction self-locking. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0030] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0031] Reference numerals:

[0032] 1. Frame; 2. Upper pressure roller assembly; 3. Lower pressure roller assembly; 4. Drive device; 5. Gap control device; 6. Feedback device; 7. Guide groove; 8. Upper roller guide mechanism;

[0033] 101. Upper wall panel; 102. Lower wall panel;

[0034] 501, block one; 502, block two; 503, regulating device;

[0035] 5031, guide block; 5032, lead screw; 5033, lead screw reducer;

[0036] 601. Block; 602. Feedback sensor.

[0037] 9. Limit sensor; 10. Sensor block. DETAILED DESCRIPTION

[0038] The following embodiments of the technical solution of the present invention are described in detail with reference to the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the present invention and are therefore only examples and are not intended to limit the scope of protection of the present invention.

[0039] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by those skilled in the art to which this utility model belongs.

[0040] In the description of this application, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, 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 on the present invention.

[0041] In addition, the terms "first," "second," etc. are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the technical features indicated. In the description of this utility model, "plurality" means more than two, unless otherwise specifically defined.

[0042] In this application, unless otherwise expressly specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0043] Example

[0044] like Figure 1 As shown, the present invention provides a mechanical structure gap control mechanism, which includes: a frame 1, a lower pressure roller assembly 3, an upper pressure roller assembly 2, a gap control device 5 and a feedback device 6.

[0045] The lower pressure roller assembly 3 and the upper pressure roller assembly 2 are installed on the frame 1, and the upper pressure roller assembly 2 is installed at intervals above the lower pressure roller assembly 3. The upper pressure roller assembly 2 is connected to a driving device 4, wherein the driving device 4 can be implemented by a hydraulic cylinder or an electric push rod, etc. In this embodiment, a hydraulic cylinder is used according to the required pressure. The driving device 4 is located at the top of the bracket, and the telescopic rod at its output end is connected to the upper pressure roller assembly 2 to drive the upper pressure roller assembly 2 to move up and down towards or away from the lower pressure roller assembly 3, and at the same time can continue to provide rated pressure after the upper pressure roller assembly 2 moves down into place.

[0046] The gap control device 5 includes a block 1 501, a block 2 502 and an adjustment device 503. The block 1 501 and the block 2 502 are respectively installed on the lower pressure roller assembly 3 and the upper pressure roller assembly 2, and the distance between the block 1 501 and the block 2 502 is smaller than the distance between the lower pressure roller assembly 3 and the upper pressure roller assembly 2, so as to ensure that the upper pressure roller assembly 2 contacts each other before the two pressure roller assemblies during the downward movement, thereby enabling the upper and lower pressure roller assemblies 3 to further squeeze each other and form a certain pressure after contact, and the block 1 501 and the block 2 502 play a limiting role;

[0047] The output end of the regulating device 503 is connected to the block 1 501 or the block 2 502 to change the distance between the block 1 501 and the block 2 502 to meet different requirements.

[0048] To achieve closed-loop control, the feedback device 6 includes a stopper 601 and a feedback sensor 602, which are respectively arranged on the lower pressure roller assembly 3 and the upper pressure roller assembly 2. The sensing probe of the feedback sensor 602 is arranged opposite to the stopper 601, wherein the feedback sensor 602 can adopt a high-precision contact displacement sensor with a measurement accuracy of 1μm. When the probe of the feedback sensor 602 contacts the stopper 601, it can accurately feedback the gap value between the two pressure roller assemblies when they are in contact.

[0049] By setting up a sensor in the feedback device 6 used in conjunction with the gap control device 5, firstly, the sensor can more intuitively reflect the gap information through numerical display, making the gap control device 5 more intuitive to adjust the spacing between block 1 501 and block 2 502; secondly, the change amount after each adjustment is fed back in real time by the sensor and sent to the subsequent control system. The adjustment amount of the adjustment device 503 can be adjusted again according to the change amount, thereby forming a control closed loop to ensure that the amount of each adjustment can quickly meet the corresponding requirements.

[0050] In this embodiment, a control unit is also included, which can be implemented using an editable logic controller or a single-chip microcomputer and its peripheral circuits. The control unit is connected to the adjustment device 503 and the sensor, and is used to control the output of the adjustment device 503 according to the feedback value of the sensor to achieve closed-loop control.

[0051] In order to ensure that the upper pressure roller assembly 2 on the frame 1 moves up and down smoothly, a guide groove 7 is opened in the frame 1 in the same direction as the movement direction of the driving device 4. The guide groove 7 is vertically arranged. An upper roller guide mechanism 8 connected between the driving device 4 and the upper pressure roller assembly 2 is provided in the guide groove 7. The upper roller guide mechanism 8 is used to fix the upper pressure roller assembly 2 and also plays a guiding role. The upper roller guide mechanism 8 is connected to the driving device 4.

[0052] Among them, the frame 1 includes an upper wall panel 101 and a lower wall panel 102, the guide groove 7 is located on the lower wall panel 102, and the frame 1 composed of the upper and lower wall panels 102 is located at both ends of the pressure roller assembly. The two ends of the pressure roller assembly are located in the frame 1 of the lower wall panel 102, the lower pressure roller assembly 3 is fixed at the bottom of the guide groove 7, and the upper pressure roller assembly 2 moves up and down in the guide groove 7. The frame 1 is set to be formed by the upper and lower wall panels 102, which is convenient for disassembly and maintenance of the upper and lower pressure roller assemblies 3 in the guide groove 7.

[0053] In this embodiment, the upper pressure roller assembly 2 and the lower pressure roller assembly 3 have the same structure, both including a roller body and an axle seat connected to both ends of the roller body. The axle seat of the upper pressure roller assembly 2 is slidably connected to the guide groove 7 through the upper roller guide mechanism 8, and the axle seat of the lower pressure roller assembly 3 is fixed in the guide groove 7.

[0054] The block 1 501 and the block 2 502 are both wedge-shaped blocks, and the inclined surfaces of the two wedge-shaped blocks are arranged relative to each other. When the wedge-shaped blocks are displaced along the inclined surfaces between batches, the distance between the bottom surfaces of the two wedge-shaped blocks will change. At the same time, the block 1 501 and the block 2 502 are respectively arranged on the shaft seats of the two pressure roller assemblies, driving the spacing between the pressure roller assemblies.

[0055] The adjusting device 503 includes a guide block 5031 and a lead screw 5032 driving unit, and the spacing adjustment is achieved through the cooperation of the lead screw 5032 driving unit, the guide block 5031 and the wedge block.

[0056] The guide block 5031 is fixed on the frame 1, and the block 1 501 is slidably connected to the guide block 5031. Specifically, the bottom of the block 1 501 away from its inclined surface is slidably connected to the guide block 5031. A horizontal slide groove is provided on the guide block 5031, and the length direction of the slide groove is located in the orthogonal plane of the inclined surface of the wedge block. When the two wedge blocks move back and forth on the guide block 5031, the contact parts thereof have different heights due to the inclined surface, thereby adjusting the spacing distance between the two pressure roller assemblies. The output end of the screw 5032 drive unit is connected to the block 1 501, and is used to drive the block 1 501 to slide on the guide block 5031.

[0057] The screw 5032 driving unit includes a screw 5032 and a screw reducer 5033 .

[0058] The lead screw 5032 is passed through the lower wall plate 102 of the bracket, and a lead screw nut 5032 is assembled on the lead screw 5032. The lead screw nut 5032 is connected to the block 1 501. The lead screw 5032 rotates to drive the block 1 501 to move back and forth. The block 1 501 is slidably connected to the guide block 5031 to limit the moving direction of the guide block 5031. The output end of the lead screw reducer 5033 is connected to one end of the lead screw 5032 to drive the lead screw 5032 to rotate.

[0059] In this embodiment, in order to achieve friction self-locking, the slope value of the inclined surface of the wedge block is not greater than the static friction coefficient μ of its surface. Due to the pressure contact between the two wedge blocks, friction self-locking is achieved. In this embodiment, the slope of the inclined surface of the wedge block is not greater than 1:50, and at the same time, higher precision adjustment control can be achieved.

[0060] In order to control the movement range of block 501 on the guide block 5031, a number of limit sensors 9 are arranged on the guide block 5031 at axial intervals along the lead screw 5032 drive unit. There are three limit sensors 9, left and right limit sensors 9 on the left and right sides, and a zero position sensor in the middle. A sensor baffle 10 corresponding to the limit sensor 9 is provided on the block 501. When the sensor baffle 10 contacts the three limit sensors 9, a signal is sent to limit the movement range of block 501 through the left and right limit sensors 9. The middle zero position sensor control position is used as a reference for the initial state. The three limit sensors 9 are connected to the control unit to provide real-time feedback on the position of block 501, so that the subsequent control unit can more accurately adjust the left and right translation position of block 501, and thus more accurately adjust the spacing between the upper and lower pressure roller assemblies.

[0061] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. A mechanical structure gap control mechanism, characterized in that: include: frame; A lower pressure roller assembly is installed on the frame; An upper pressure roller assembly is installed above the lower pressure roller assembly at intervals, and a driving device is connected to the upper pressure roller assembly to drive the upper pressure roller assembly to move closer to or away from the lower pressure roller assembly; A gap control device, comprising a block 1, a block 2, and an adjusting device, wherein the block 1 and the block 2 are respectively mounted on the lower pressure roller assembly and the upper pressure roller assembly, and the spacing between the block 1 and the block 2 is smaller than the spacing between the lower pressure roller assembly and the upper pressure roller assembly. The output end of the adjusting device is connected to the block 1 or the block 2 to change the spacing between the block 1 and the block 2. The feedback device comprises a stopper and a feedback sensor respectively arranged on the lower pressure roller assembly and the upper pressure roller assembly, wherein the sensing probe of the feedback sensor is arranged opposite to the stopper.

2. The mechanical structure gap control mechanism according to claim 1, characterized in that: A guide groove which is consistent with the movement direction of the driving device is provided in the frame, and an upper roller guide mechanism which is connected between the driving device and the upper pressure roller assembly is provided in the guide groove.

3. The mechanical structure gap control mechanism according to claim 2, characterized in that: The upper pressure roller assembly has the same structure as the lower pressure roller assembly, and both include a roller body and shaft seats connected to both ends of the roller body. The shaft seat of the upper pressure roller assembly is slidably connected to the guide groove through the upper roller guide mechanism.

4. The mechanical structure gap control mechanism according to claim 1, characterized in that: The first block and the second block are both wedge-shaped blocks, and the inclined surfaces of the two wedge-shaped blocks are arranged opposite to each other.

5. The mechanical structure gap control mechanism according to claim 4, characterized in that: The regulating device comprises: a guide block fixed to the frame, the block being slidably connected to the guide block; The output end of the lead screw driving unit is connected to the block 1 and is used to drive the block 1 to slide on the guide block.

6. The mechanical structure gap control mechanism according to claim 5, characterized in that: The slope of the wedge-shaped block is not greater than its surface static friction coefficient μ.

7. The mechanical structure gap control mechanism according to claim 5, characterized in that: A plurality of limit sensors are arranged at intervals along the axial direction of the screw drive unit on the guide block, and a sensor baffle corresponding to the limit sensors is arranged on the block 1 to limit the moving range of the block 1.

8. The mechanical structure gap control mechanism according to claim 5, characterized in that: The screw drive unit comprises: a lead screw on which a lead screw nut connected to the block is mounted; The output end of the screw reducer is connected to one end of the screw to drive the screw to rotate.

9. The mechanical structure gap control mechanism according to claim 1, characterized in that: It also includes a control unit, which is connected to the regulating device and the feedback sensor and is used to control the output of the regulating device according to the feedback value of the feedback sensor.

Images