Adjusting mechanism for speed difference between rollers

Abstract

The utility model relates to an inter-roller speed difference adjusting mechanism, and belongs to the technical field of battery manufacturing. The utility model provides an inter-roller speed difference adjusting mechanism which comprises a first roller assembly, a second roller assembly, a third roller assembly and a fourth roller assembly. The second roller assembly comprises a second motor, a second passing roller, a second transmission wheel and a speed reducer, the speed reducer comprises an input shaft and an output shaft, the second motor is used for driving the input shaft to rotate, and the output shaft and the second passing roller are in transmission connection and synchronously rotate; wherein the first motor is in transmission connection with the first transmission wheel and the second transmission wheel through transmission parts, and the second motor is configured to output the rotating speed based on the preset speed difference ratio between the first passing roller and the second passing roller and the rotating speed of the second transmission wheel. According to the speed difference adjusting mechanism between the rollers, the tension fluctuation amplitude in the material belt conveying process can be reduced, and therefore the undesirable phenomenon that the material belt is damaged due to tension fluctuation is relieved.

Description

Technical Field

[0001] The present application relates to the technical field of battery manufacturing, and in particular to a roller speed difference adjustment mechanism. Background Art

[0002] During the conveying process of material strips such as diaphragms, the tension of the material strips such as diaphragms needs to be adjustable due to the different processes in each stage.

[0003] At present, the tension control of the material belt during conveying mainly relies on the speed difference between two adjacent rollers. Since each roller uses an independent motor to control the speed, if the peak and valley of the speed of the two adjacent motors are superimposed, the tension fluctuation of the material belt will be large. If the tension of the material belt is too large, it may cause the material belt to tear or burst; if the tension of the material belt is insufficient, it may cause the material belt to wrinkle, which will cause damage to the material belt. Utility Model Content

[0004] To this end, the present application proposes a roller speed difference adjustment mechanism and a material belt conveying device, which can reduce the tension fluctuation amplitude during the material belt conveying process, thereby alleviating the undesirable phenomenon of material belt damage caused by tension fluctuation.

[0005] Some embodiments of the present application provide a roller speed difference adjustment mechanism, comprising: a first roller assembly, comprising a first motor, a first roller and a first transmission wheel; a second roller assembly, comprising a second motor, a second roller, a second transmission wheel and a reducer, wherein the reducer comprises an input shaft, an output shaft and a base, wherein the second transmission wheel is mounted on the base, wherein the second motor is used to drive the input shaft to rotate, wherein the output shaft is transmission-connected to the second roller and rotates synchronously; wherein the first motor is transmission-connected to the first transmission wheel and the second transmission wheel through a transmission member, and the second motor is configured to output a rotational speed based on a preset speed difference ratio between the first roller and the second roller and a rotational speed of the second transmission wheel.

[0006] According to some embodiments of the present application, a first output wheel is provided at the output end of the first motor, and the first output wheel, the first transmission wheel and the second transmission wheel are connected by a first synchronous belt transmission.

[0007] According to some embodiments of the present application, the reducer further includes: a base, and the second transmission wheel is sleeved on the base.

[0008] According to some embodiments of the present application, a second output wheel is provided at the output end of the second motor, and the second output wheel and the input shaft are connected via a second synchronous belt transmission.

[0009] According to some embodiments of the present application, it also includes: a control device configured to adjust the output speed of the second motor based on the speed difference ratio between the first roller and the second roller and the output speed of the first motor.

[0010] According to some embodiments of the present application, at least two second roller assemblies are provided, and the second transmission wheel of each second roller assembly rotates synchronously with the first transmission wheel through a transmission member.

[0011] According to some embodiments of the present application, the reducer further includes two bearing seats, one of which is used to rotatably support the input shaft, and the other of which is used to rotatably support the output shaft.

[0012] According to some embodiments of the present application, the inter-roller speed difference adjustment mechanism is applied to a diaphragm slitting device, the first roller is a driving roller, and the second roller is a slitting contact roller.

[0013] According to some embodiments of the present application, the speed of the second motor is equal to the speed w of the input shaft. 输入 , the speed of the second roller is equal to the speed w of the output shaft 输出 The reduction ratio of the reducer is i, and the speed of the second transmission wheel (123) is w 主线 , the speed difference ratio between the first roller (112) and the second roller (122) is △, which satisfies:

[0014]

[0015] According to some embodiments of the present application, the outer diameters of the first transmission wheel and the second transmission wheel are the same, and the outer diameters of the first passing roller and the second passing roller are the same.

[0016] Compared with the prior art, this solution has the following beneficial effects:

[0017] The roller speed difference adjustment mechanism of the embodiment of the present application is used to convey the material belt, and the first motor is connected to the first transmission wheel and the second transmission wheel through a transmission member, and the output speed of the second motor is adjusted with reference to the speed difference ratio between the first roller and the second roller and the output speed of the second transmission wheel, that is, the linear speed of the first roller is used as the reference conveying speed of the material belt, and the speed difference ratio between the two rollers is used as the evaluation standard of the fluctuation amplitude of the material belt tension, and then the linear speed of the second roller is adjusted to maintain the linear speed of the second roller and the speed difference ratio of the first roller at a fixed value, thereby ensuring that the fluctuation amplitude of the material belt tension falls within a preset range. Since the second motor is connected to the second roller through a reducer, the accuracy and stability of the speed difference adjustment can be improved, thereby stabilizing the conveying of the material belt and reducing the risk of quality problems of the material belt during the conveying process.

[0018] Additional aspects and advantages of the present application will be given in part in the description below, and in part will become apparent from the description below, or will be learned through the practice of the present application. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings required for use in the embodiments will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the present application and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 A schematic diagram of a roller speed difference adjustment mechanism provided in an embodiment of the present application from one viewing angle;

[0021] Figure 2 A schematic diagram of the structure of the reducer in the roller speed difference adjustment mechanism provided in the embodiment of the present application;

[0022] Figure 3 A schematic diagram of another perspective of the inter-roller speed difference adjustment mechanism provided in an embodiment of the present application;

[0023] Figure 4 This is an electrical connection diagram of the control device of the inter-roller speed difference adjustment mechanism provided in an embodiment of the present application.

[0024] Icons: 100-speed difference adjustment mechanism between rollers; 110-first roller assembly; 111-first motor; 112-first roller; 113-first transmission wheel; 114-first output wheel; 115-first synchronous belt; 120-second roller assembly; 121-second motor; 122-second roller; 123-second transmission wheel; 124-second output wheel; 125-second synchronous belt; 126-reducer; 1261-input shaft; 1262-output shaft; 1263-base; 1264-bearing seat; 130-control device; 200-material belt. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings here can be arranged and designed in various different configurations.

[0026] Therefore, the following detailed description of the embodiments of the present application provided in the accompanying drawings is not intended to limit the scope of the present application for which protection is sought, but merely represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in the field without creative work are within the scope of protection of the present application.

[0027] In the related art, two adjacent rollers are driven by independent motors, and the speed difference between the rollers is adjusted by directly controlling the output speed of each motor. However, the servo motor itself has a speed fluctuation range of at least 3‰. Compared with the single motor drive method, the superposition of the output speed fluctuation range of the two motors leads to a further increase in the speed difference fluctuation range of the two rollers, resulting in unstable tension of the material strip, which causes quality problems.

[0028] After research, the inventors found that if a new method for controlling the speed difference between rollers can be provided, and the linear speed of one roller is used as a reference to adjust the linear speed of the other roller, the above phenomenon will be alleviated and the speed difference fluctuation amplitude between the two adjacent rollers will be reduced, thereby ensuring that the tension is stable during the conveying process of the material belt.

[0029] like Figure 1 , Figure 2 and Figure 3 As shown, the roller speed difference adjustment mechanism 100 of some embodiments of the present application includes a first roller assembly 110 and a second roller assembly 120, the first roller assembly 110 includes a first motor 111, a first roller 112 and a first transmission wheel 113, the first transmission wheel 113 is installed at the end of the first roller 112; the second roller assembly 120 includes a second motor 121, a second roller 122, a second transmission wheel 123 and a reducer 126, the reducer 126 includes an input shaft 1261, an output shaft 1262 and a base 1263, the second transmission wheel 123 is installed on the base 1263, the second motor 121 is used to drive the input shaft 1261 to rotate, and the output shaft 1262 is transmission-connected to the second roller 122 and rotates synchronously. The first motor 111 is connected to the first transmission wheel 113 and the second transmission wheel 123 through a transmission member, and the second motor 121 is configured to output a rotation speed according to the speed difference ratio between the first roller 112 and the second roller 122 and the rotation speed of the second transmission wheel 123.

[0030] In some embodiments of the present application, the material belt 200 is a diaphragm, an important component of a lithium battery; in other embodiments, the roller speed difference adjustment mechanism 100 of the embodiments of the present application may also be applicable to other types of material belts that need to control the tension fluctuation amplitude during transportation.

[0031] The function of the transmission member is to drive the first transmission wheel 113 and the second transmission wheel 123 to rotate synchronously. The second roller 122 is located downstream of the first roller 112. In order to adjust the tension of the material belt 200 and meet the production requirements of different working conditions, it is necessary to set the second motor 121, which is used to adjust the speed of the second roller 122; that is, the first motor 111 is used as a power source for the rotation of the first roller 112 and the second roller 122, and the second motor 121 plays a role in assisting the adjustment of the speed of the second roller 122, so as to achieve the speed difference ratio between the first roller 112 and the second roller 122 to be maintained at a fixed value. It is understandable that for engineering and technical personnel, it is hoped that the speed difference ratio between the first roller 112 and the second roller 122 is maintained at a fixed value, that is, it is hoped that the material belt 200 maintains a constant tension. In order to maintain the preset speed difference ratio, it is necessary to set the second motor 121 to adjust the speed of the second roller 122.

[0032] The first transmission wheel 113 and the second transmission wheel 123 are rotated synchronously through the transmission member. For example, the first roller 112 and the second roller 122 have the same outer diameter, the first transmission wheel 113 and the second transmission wheel 123 have the same outer diameter, and the material belt 200 passes through the first roller 112 and the second roller 122 in sequence. In an ideal state, the first roller 112 and the second roller 122 rotate at the same speed to achieve the same linear speed, so as to stably convey the material belt 200.

[0033] The roller speed difference adjustment mechanism 100 of the embodiment of the present application is used to convey the material belt 200. The first motor 111 is connected to the first transmission wheel 113 and the second transmission wheel 123 through a transmission member, and the second motor 121 is connected to the second roller 122 through a reducer 126. The speed difference ratio between the first roller 112 and the second roller 122 is used as a standard for evaluating the tension of the material belt. The output speed of the second motor 121 is adjusted with reference to the output speed of the second transmission wheel 123, that is, the linear speed of the first roller 112 is used as the reference conveying speed of the material belt 200, and the linear speed of the second roller 122 is adjusted based on the speed difference, so that the linear speed of the second roller 122 maintains a difference with the linear speed of the first roller 112. Considering the fluctuation of the second motor 121 itself, the reducer 126 is used to reduce the influence of the fluctuation of the second motor 121 itself on the second roller 122, so as to stably convey the material belt 200, ensure that the tension fluctuation of the material belt 200 is small during the conveying process, and reduce the risk of quality problems of the material belt 200 during the conveying process.

[0034] As an example form, the inter-roller speed difference adjustment mechanism 100 is applied to a membrane slitting device, the first roller 112 is a driving roller, the second roller 122 is a slitting contact roller, and the rotation speed of the second roller 122 is slightly higher than that of the first roller 112 to maintain a certain tension in the material strip.

[0035] The reducer 126 also includes two bearing seats 1264 , one of which is used to rotatably support the input shaft 1261 , and the other is used to rotatably support the output shaft 1262 .

[0036] The second motor 121 adjusts the rotation speed of the second roller 122, and the second roller 122 drives the material belt 200 to move forward through the friction between the roller surface and the material belt 200. As a preferred embodiment, the linear speed of the second roller 122 is greater than the running speed of the material belt 200 itself, and the material belt 200 is driven to move forward through the sliding friction.

[0037] By providing the reducer 126 , the influence of the speed fluctuation of the second motor 121 on the speed of the second roller 122 can be reduced, thereby reducing the tension change of the material belt 200 caused by the speed fluctuation of the second motor 121 itself.

[0038] like Figure 3 As shown, in some embodiments of the present application, a first transmission wheel 113 is provided at the end of the first roller 112, and the first motor 111 is connected to the first transmission wheel 113 and the second transmission wheel 123 through a transmission member to realize synchronous rotation of the first transmission wheel 113 and the second transmission wheel 123.

[0039] The transmission member may be a synchronous belt or a plurality of meshingly connected gear assemblies.

[0040] With this arrangement, the outer circumferential surfaces of the first and second rollers 112 and 122 can be avoided so as to have a sufficient width range for conveying the material belt 200 .

[0041] In some embodiments of the present application, a first output wheel 114 is provided at the output end of the first motor 111, and the first output wheel 114, the first transmission wheel 113 and the second transmission wheel 123 are connected by a first synchronous belt 115; a second output wheel 124 is provided at the output end of the second motor 121, and the second output wheel 124 and the input shaft 1261 are connected by a second synchronous belt 125.

[0042] With this arrangement, it is possible to simply and reliably realize that the first motor 111 drives the first roller 112 to rotate and drives the second roller 122 to rotate synchronously, while the second motor 121 drives the second roller 122 to rotate via the reducer 126 .

[0043] like Figure 2 As shown, in some embodiments of the present application, the reducer 126 also includes a base 1263 , and the second transmission wheel 123 is sleeved on the base 1263 .

[0044] Specifically, the second transmission wheel 123 is fixedly sleeved on the outer ring of the base 1263, and the second transmission wheel 123 drives the base 1263 to rotate synchronously. The second motor 121 is connected to the second roller 122 through the reducer 126, and the second motor 121 is fixedly installed on the external frame and connected to the input shaft 1261 of the reducer 126.

[0045] Through this form, the speed reducer 126 can be simply and reliably installed on the second roller 122.

[0046] In other embodiments, the second transmission wheel 123 may also be transmission-connected to the base 1263 via a transmission gear ring or the like.

[0047] like Figure 4 As shown, in some embodiments of the present application, the inter-roller speed difference adjustment mechanism 100 also includes a control device 130, which is configured to adjust the output speed of the second motor 121 according to the speed difference ratio between the first roller 112 and the second roller 122 and the output speed of the second transmission wheel 123.

[0048] The control device 130 is electrically connected to the first motor 111 and the second motor 121. The control device 130 controls the output speed of the first motor 111 according to the preset linear speed of the first roller 112 and the preset speed difference ratio. In order to maintain the speed difference between the second roller 122 and the first roller 112 at a fixed value, the output speed of the second motor 121 is further adjusted.

[0049] In some embodiments of the present application, at least two second roller assemblies 120 are provided, and the second roller 122 of each second roller assembly 120 rotates synchronously with the first roller 112 through a transmission member.

[0050] As an example, the roller speed difference adjustment mechanism 100 is applied to a material strip slitting system, the second roller assembly 120 is a contact roller, the first roller assembly 110 is a passing roller docked with the contact roller, and each second passing roller 122 receives a slit material strip.

[0051] The number of the second roller assemblies 120 may be two, three, four, or the like.

[0052] Through this form, the speed difference between the plurality of second rollers 122 and the first roller 112 can be synchronously adjusted to ensure that each second roller 122 and the first roller 112 can stably convey the material belt 200 .

[0053] The working principle of the roller speed difference adjustment mechanism 100 of the embodiment of the present application is as follows:

[0054] The first transmission wheel 113, the first output wheel 114 and the second transmission wheel 123 jointly support the first synchronous belt 115, so that the first motor 111 drives the first roller 112 and the second roller 122 to rotate;

[0055] The second output wheel 124 is connected to the input shaft 1261 through the second synchronous belt 125, the output shaft 1262 is connected to the second roller 122, and the second transmission wheel 123 drives the base 1263 to rotate synchronously, so that the second motor 121 adjusts the speed of the second roller 122 through the reducer 126;

[0056] The speed of the second roller 122 is equal to the speed w of the output shaft 1262 输出 , the reduction ratio of the reducer 126 is i, and the speed of the second transmission wheel 123 is w 主线 is the reference speed.

[0057] w 输出 The calculation formula is:

[0058]

[0059] For example, when w 输入 =w 主线 When 输出 =w 主线 , the rotation speed of the first roller 112 is the same as the rotation speed of the second roller 122, w 输入 The fluctuation of is also significantly reduced due to the influence of the reduction ratio i parameter; 输入 Subtract w 主线 Then divide by i, w 输入 The fluctuation value of w 输出 The impact has been effectively reduced.

[0060] The speed difference ratio between the first roller 112 and the second roller 122 is:

[0061] Δ=(w 输出 -w 主线 ) / w 主线

[0062] Through the above two formulas, we can get:

[0063] w 输入 =w 主线 ×(1+i×Δ)

[0064] The control device 130 automatically adjusts the rotation speed of the second motor 121 according to the instruction, thereby adjusting △ so that △ meets the preset range, and adjusts the tension of the material strip in real time so that the tension of the material strip meets the process requirements.

[0065] It can be understood that △ is a parameter input based on empirical values, and there is a relationship between the material strip tension and △. For example, the △ value is input based on a pre-prepared chart reflecting the relationship between the material strip tension and the △ value.

[0066] The first motor 111 is connected to the first roller 112 and the second roller 122. Since the first synchronous belt 115 is used to drive and connect the first transmission wheel 113 and the second transmission wheel 123, the speed of the first motor 111 itself fluctuates, thereby achieving synchronous fluctuations in the speed of the first roller 112 and the second roller 122, which can eliminate the speed difference between the rollers caused by the speed fluctuation of the first motor 111 itself; further, the second motor 121 is connected to the second roller 122 through the reducer 126, which reduces the adjustment range of the roller speed and increases the adjustment accuracy of the roller speed. After the deceleration effect of the reducer 126, the speed fluctuation value of the second motor 121 is significantly reduced. After the above two improvements, the speed difference adjustment mechanism 100 between rollers in the embodiment of the present application can significantly eliminate the influence of the speed fluctuation of the servo motor itself on the speed difference between rollers, thereby achieving stable conveying of the material belt 200 and reducing the risk of damage to the material belt 200 due to excessive tension fluctuation during conveying.

[0067] It should be noted that, in the absence of conflict, the features in the embodiments of this application may be combined with each other.

[0068] The above description is only the preferred embodiment of the present application and is not intended to limit the present application. For those skilled in the art, the present application may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A roller speed difference adjustment mechanism (100), characterized in that: include: A first roller assembly (110) comprises a first motor (111), a first roller (112) and a first transmission wheel (113), wherein the first transmission wheel (113) is mounted on an end of the first roller (112); The second roller assembly (120) comprises a second motor (121), a second roller (122), a second transmission wheel (123) and a reducer (126); the reducer (126) comprises an input shaft (1261), an output shaft (1262) and a base (1263); the second transmission wheel (123) is mounted on the base (1263); the second motor (121) is used to drive the input shaft (1261) to rotate; the output shaft (1262) is in transmission connection with the second roller (122) and rotates synchronously; The first motor (111) is connected to the first transmission wheel (113) and the second transmission wheel (123) through a transmission member, and the second motor (121) is configured to output a rotation speed based on a preset speed difference ratio between the first roller (112) and the second roller (122) and a rotation speed of the second transmission wheel (123).

2. The roller speed difference adjustment mechanism (100) according to claim 1, characterized in that: The output end of the first motor (111) is provided with a first output wheel (114), and the first output wheel (114), the first transmission wheel (113) and the second transmission wheel (123) are connected in transmission via a first synchronous belt (115).

3. The roller speed difference adjustment mechanism (100) according to claim 1, characterized in that: The second transmission wheel (123) is sleeved on the base (1263).

4. The roller speed difference adjustment mechanism (100) according to claim 1, characterized in that: The output end of the second motor (121) is provided with a second output wheel (124), and the second output wheel (124) and the input shaft (1261) are connected in transmission via a second synchronous belt (125).

5. The roller speed difference adjustment mechanism (100) according to claim 1, characterized in that: Also includes: The control device (130) is configured to adjust the output speed of the second motor (121) based on a preset speed difference ratio between the first roller (112) and the second roller (122) and the output speed of the second transmission wheel (123).

6. The roller speed difference adjustment mechanism (100) according to claim 1, characterized in that: At least two second roller assemblies (120) are provided, and the second transmission wheel (123) of each second roller assembly (120) is transmission-connected to the first transmission wheel (113) via a transmission member.

7. The roller speed difference adjustment mechanism (100) according to claim 1, characterized in that: The reducer (126) further includes two bearing seats (1264), one of which is used to rotatably support the input shaft (1261), and the other of which is used to rotatably support the output shaft (1262).

8. The roller speed difference adjustment mechanism (100) according to claim 1, characterized in that: The inter-roller speed difference adjustment mechanism (100) is applied to a diaphragm slitting device, wherein the first passing roller (112) is a driving roller, and the second passing roller (122) is a slitting contact roller.

9. The roller speed difference adjustment mechanism (100) according to claim 1, characterized in that: The rotation speed of the second motor (121) is equal to the rotation speed w of the input shaft (1261) 输入 , the rotation speed of the second roller (122) is equal to the rotation speed w of the output shaft (1262) 输出 The reduction ratio of the reducer (126) is i, and the rotation speed of the second transmission wheel (123) is w 主线 , the speed difference ratio between the first roller (112) and the second roller (122) is △, which satisfies: In 输入 =in 主线 ×(1+i×△)。 10. The roller speed difference adjustment mechanism (100) according to claim 1, characterized in that: The first transmission wheel (113) and the second transmission wheel (123) have the same outer diameter, and the first passing roller (112) and the second passing roller (122) have the same outer diameter.

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