Winding and unwinding device and pole piece manufacturing equipment

Abstract

The utility model relates to a winding and unwinding device and pole piece manufacturing equipment. The winding and unwinding device comprises a driving piece, a transmission shaft, a winding and unwinding shaft and a pin tooth transmission pair. The pin tooth transmission pair comprises a main gear and a driven gear. The output end of the driving part is connected with a main gear which is in meshed connection with a driven gear, the driven gear is connected to one end of a transmission shaft, and the other end of the transmission shaft is connected to a winding and unwinding shaft. Wherein the main gear is a pin wheel. According to the winding and unwinding device and the pole piece manufacturing equipment, the stability of the tension of the pole piece can be improved.

Description

Technical Field

[0001] The present application relates to the technical field of battery production equipment, and in particular to a winding and unwinding device and pole piece manufacturing equipment. Background Art

[0002] In the process of manufacturing and slitting, die-cutting, etc. of the pole piece, a winding and unwinding device is required to wind the pole piece and unwind or rewind the pole piece. In the process of unwinding or rewinding the pole piece, the traditional winding and unwinding device cannot ensure the stability of the pole piece tension, which affects the processing quality of the pole piece. Utility Model Content

[0003] Based on this, it is necessary to provide a winding and unwinding device and a pole piece manufacturing equipment that can improve the stability of the pole piece tension in order to address the above-mentioned problems.

[0004] A winding and unwinding device, the winding and unwinding device comprising a driving member, a transmission shaft, a winding and unwinding shaft and a pin-tooth transmission pair, the pin-tooth transmission pair comprising a main gear and a driven gear;

[0005] The output end of the driving member is connected to the main gear, the main gear is meshedly connected to the driven gear, the driven gear is connected to one end of the transmission shaft, and the other end of the transmission shaft is connected to the retractable reel;

[0006] Wherein, the main gear is a pin gear.

[0007] In some embodiments, the main gear is a pin wheel, and the main gear includes a base, pin teeth and a bearing. There are two bases, and the two bases are opposite to each other and spaced apart. There are multiple pin teeth and bearings, and all the pin teeth are spaced apart circumferentially around the base, and the pin teeth are rotatably connected to the two bases through the bearings.

[0008] In some embodiments, the reeling and unreeling device further comprises a support seat, the support seat comprises a support plate, a first side plate and a second side plate, the first side plate and the second side plate are spaced apart and arranged at opposite ends of the support plate;

[0009] The transmission shaft passes through the first side plate and the second side plate, and has a first end and a second end protruding from the first side plate and the second side plate on both sides away from each other, the driven gear is located on the side of the first side plate facing away from the second side plate, and is connected to the first end, and the retractable reel is located on the side of the second side plate facing away from the first side plate, and is connected to the second end.

[0010] In some embodiments, the driven gear is arranged closer to the support plate relative to the main gear.

[0011] In some embodiments, the support seat further includes a mounting plate, which is mounted on the first side plate and is used for assembling the driving member.

[0012] In some embodiments, the reeling and winding device further includes a protective cover, which is disposed on the support plate and between the first side plate and the second side plate. The protective cover is disposed outside the transmission shaft and is spaced apart from the transmission shaft.

[0013] In some embodiments, the reeling and unwinding device further includes a connecting flange, which is disposed on a side of the second side plate facing away from the first side plate and is used to connect the second end and the reeling and unwinding shaft.

[0014] In some of the embodiments, the connecting flange protrudes from the circumferential side surface of the retractable reel and the transmission shaft in the radial direction of the retractable reel, and is used to abut against the wound pole piece.

[0015] In some embodiments, the first side plate, the second side plate and the support plate are integrally formed.

[0016] A pole piece manufacturing device comprises a winding and unwinding device as described in any one of the above embodiments.

[0017] The above-mentioned winding and unwinding device and pole piece manufacturing equipment are designed to have a pin wheel as the main gear. During the process of the pin wheel meshing with the driven gear and transmitting, the contact area between the pin teeth of the pin wheel and the teeth of the driven gear is reduced, so that the sliding friction between the pin teeth of the pin wheel and the teeth of the driven gear is reduced. In this case, the transmission efficiency and transmission stability are improved to a certain extent, so that the driving part can accurately control the winding and unwinding reel to unwind or rewind the pole piece, the pole piece tension is stable, and the pole piece processing quality is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 Schematic diagram of the structure of a winding and unwinding device in one embodiment of the present application.

[0019] Figure 2 for Figure 1 The schematic diagram of the structure of the pin-tooth transmission pair in the rewinding and unwinding device is shown.

[0020] Figure Number:

[0021] 1. Rewinding and unwinding device;

[0022] 10. Support seat; 20. Pin gear transmission pair; 30. Driving member; 40. Transmission shaft; 50. Retractable reel; 60. Protective cover; 70. Connecting flange;

[0023] 11. Support plate; 12. First side plate; 13. Second side plate; 14. Mounting plate;

[0024] 21. Main gear; 211. Base; 212. Pin gear; 213. Bearing; 22. Driven gear. DETAILED DESCRIPTION

[0025] In order to make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the specific implementation methods of the present application are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present application. However, the present application can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present application, so the present application is not limited by the specific embodiments disclosed below.

[0026] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0027] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of this application, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0028] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0029] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0030] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. When an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are for illustrative purposes only and are not intended to be the only implementation method.

[0031] At present, from the perspective of market development, the application of batteries is becoming more and more extensive. Batteries are not only used in energy storage power systems such as hydropower, thermal power, wind power and solar power stations, but also widely used in electric vehicles such as electric bicycles, electric motorcycles, electric cars, as well as military equipment and aerospace and other fields. With the continuous expansion of battery application areas, its market demand is also constantly expanding.

[0032] The battery includes pole pieces. During the process of pole piece manufacturing, slitting, die cutting, etc., a winding and unwinding device is required to wind the pole pieces and unwind or rewind the pole pieces. During the process of unwinding or rewinding the pole pieces, the traditional winding and unwinding device cannot ensure the stability of the pole piece tension, which affects the processing quality of the pole pieces.

[0033] The applicant has carefully studied and found that one of the reasons why the winding and unwinding device cannot ensure the stability of the pole piece tension is that the reduction gear pair used to reduce the rotation speed of the driving member and transmit it to the winding and unwinding shaft in the winding and unwinding device is formed by the meshing of spur gears and helical gears. When the spur gears and helical gears mesh and rotate, there is slippage between the spur gears and the helical gears, which affects the power transmission efficiency and transmission stability, and thus makes it impossible for the driving member to accurately control the winding and unwinding shaft to unwind or rewind the pole piece, and the pole piece tension is unstable, affecting the pole piece processing quality.

[0034] Please also read Figure 1 and Figure 2In order to alleviate the problem of unstable tension in unwinding or winding of the pole piece, the applicant has designed a winding and unwinding device 1 after in-depth research. The winding and unwinding device 1 includes a driving member 30, a transmission shaft 40, a winding and unwinding shaft 50 and a pin gear transmission pair 20. The pin gear transmission pair 20 includes a main gear 21 and a driven gear 22; the output end of the driving member 30 is connected to the main gear 21, the main gear 21 is meshedly connected to the driven gear 22, the driven gear 22 is connected to one end of the transmission shaft 40, and the other end of the transmission shaft 40 is connected to the winding and unwinding shaft 50; wherein the main gear 21 is a pin wheel.

[0035] The reeling and unwinding device 1 may be a reeling device, or an unwinding device, or an integrated reeling and unwinding device.

[0036] The driving member 30 may be a servo motor, a motor, etc., which is not specifically limited here.

[0037] In the present application, the pin-tooth transmission pair 20 is arranged as a reduction gear pair between the driving member 30 and the transmission shaft 40, and the rotational speed of the driving member 30 is reduced and transmitted to the transmission shaft 40. Then, the reduced rotational speed is transmitted to the reel 50 through the transmission shaft 40 to realize the unwinding or rewinding of the pole piece.

[0038] By designing the main gear 21 as a pin wheel, the pin wheel has pin teeth 212. During the process of the pin wheel meshing with the driven gear 22 and transmitting, the contact area between the pin teeth 212 of the pin wheel and the teeth of the driven gear 22 is reduced, so that the sliding friction between the pin teeth 212 of the pin wheel and the teeth of the driven gear 22 is reduced. In this case, the transmission efficiency and transmission stability are improved to a certain extent, so that the driving member 30 can accurately control the winding and unwinding reel 50 to unwind or rewind the pole piece, the pole piece tension is stable, and the pole piece processing quality is high. Among them, the main gear 21 can be a fixed pin wheel, a rolling pin wheel, etc., which can be set according to needs.

[0039] For example, taking the main gear 21 as a fixed pin wheel, the fixed pin wheel includes a base 211 and pin teeth 212. There are two bases 211, and the two bases 211 are opposite to each other and spaced apart. There are multiple pin teeth 212, and all the pin teeth 212 are spaced apart circumferentially around the base 211, and the pin teeth 212 are fixedly connected to the two bases 211.

[0040] For example, taking the main gear 21 as a pin wheel, the pin wheel includes a base 211, pin teeth 212 and a bearing 213. There are two bases 211, and the two bases 211 are opposite and spaced apart. There are multiple pin teeth 212 and bearings 213. All pin teeth 212 are spaced apart circumferentially around the base 211, and the pin teeth 212 are rotatably connected to the two bases 211 through the bearings 213.

[0041] For the pin wheel, its pin teeth 212 can also rotate relative to the base 211. In the process of the pin wheel and the driven gear 22 meshing and transmitting, the pin teeth 212 of the pin wheel roll on the tooth surface of the driven gear 22, so that there is no sliding friction between the pin and the teeth of the driven gear 22. In this case, the transmission efficiency of the pin gear transmission pair 20 is high and the transmission is stable, which further improves the accuracy of the driving member 30 controlling the winding and unwinding reel 50 to unwind or rewind the pole piece, and the pole piece tension is more stable.

[0042] Please refer again Figure 1 In some optional embodiments of the present application, the reeling and unwinding device 1 further includes a support seat 10, the support seat 10 includes a support plate 11, a first side plate 12 and a second side plate 13, the first side plate 12 and the second side plate 13 are spaced apart at opposite ends of the support plate 11; the transmission shaft 40 passes through the first side plate 12 and the second side plate 13, and is rotatably connected to the first side plate 12 and the second side plate 13 through a bearing component such as a ball bearing, a deep groove ball bearing, etc. In addition, the transmission shaft 40 has a first end and a second end protruding from both sides of the first side plate 12 and the second side plate 13 away from each other, the driven gear 22 is located on a side of the first side plate 12 facing away from the second side plate 13, and is connected to the first end of the transmission shaft 40, and the reeling and unwinding shaft 50 is located on a side of the second side plate 13 facing away from the first side plate 12, and is connected to the second end of the transmission shaft 40.

[0043] As an example, the first side plate 12, the second side plate 13 and the support plate 11 are integrally formed, and the integral forming method is simple to manufacture and convenient to form. Of course, in some other embodiments, the first side plate 12, the second side plate 13 and the support plate 11 can also be formed separately and connected by welding, gluing, etc.

[0044] In this embodiment, in the arrangement direction of the first side plate 12 and the second side plate 13, components are installed on the side of the first side plate 12 facing away from the second side plate 13, between the first side plate 12 and the second side plate 13, and on the side of the second side plate 13 facing away from the first side plate 12. Therefore, the components of the reeling and unwinding device 1 can be arranged relatively evenly along the arrangement direction of the first side plate 12 and the second side plate 13, the weight distribution of the reeling and unwinding device 1 is even, the installation stability is good, and the reeling and unwinding device 1 is also more solid and reliable.

[0045] In some optional embodiments of the present application, the driven gear 22 is arranged close to the support plate 11 relative to the main gear 21 .

[0046] Since the pin gear transmission pair 20 is a reduction gear pair, the driven gear 22 has a larger diameter than the main gear 21. Generally speaking, the driven gear 22 with a larger diameter is heavier than the main gear 21 with a smaller diameter. The driven gear 22 is arranged close to the support plate 11 relative to the main gear 21, so that the weight of the winding and unwinding device 1 is concentrated near the support plate 11, and the support plate 11 can be stably installed on the ground, wall or the frame of the pole piece manufacturing equipment, etc., which is conducive to improving the stability of the installation of the winding and unwinding device 1.

[0047] In some optional embodiments of the present application, the support seat 10 further includes a mounting plate 14 , which is mounted on the first side plate 12 and is used to assemble the driving member 30 .

[0048] For example, the mounting plate 14 is mounted on the first side plate 12, and the mounting height of the mounting plate 14 is higher than the mounting height of the first side plate 12. The driving member 30 is located between the first side plate 12 and the second side plate 13, and is installed on one side of the mounting plate 14. The main gear 21 is installed on the side of the mounting plate 14 facing away from the driving member 30, and is located on the same side of the first side plate 12 as the driven gear 22.

[0049] The provision of the mounting plate 14 is beneficial to expanding the installation space and installation position of the support base 10 , and ensures that the driving member 30 and the pin gear transmission pair 20 can be effectively installed.

[0050] In some optional embodiments of the present application, the reeling and unwinding device 1 further includes a protective cover 60, which is disposed on the support plate 11 and between the first side plate 12 and the second side plate 13, and the protective cover 60 is sleeved outside the transmission shaft 40 and spaced apart from the transmission shaft 40. The provision of the protective cover 60 can protect the transmission shaft 40 and isolate the transmission shaft 40 from the outside as much as possible, thereby reducing the possibility of the transmission shaft 40 contacting with external water vapor and other substances, and facilitating the extension of the service life of the transmission shaft 40. In addition, the provision of the protective cover 60 and the transmission shaft 40 spaced apart can also avoid friction between the protective cover 60 and the transmission shaft 40, reduce the wear of the protective cover 60 and the transmission shaft 40, and help to extend the service life of the protective cover 60 and the transmission shaft 40.

[0051] In some optional embodiments of the present application, the reeling and unwinding device 1 further includes a connecting flange 70, which is disposed on a side of the second side plate 13 facing away from the first side plate 12 and is used to connect the second end of the transmission shaft 40 and the reeling and unwinding shaft 50. The connection flange 70 is used to connect the transmission shaft 40 and the reeling and unwinding shaft 50, and the reliability of the connection is high, which ensures the stability of the power transmission.

[0052] In some optional embodiments of the present application, the connecting flange 70 protrudes from the circumferential side of the retractable reel 50 and the transmission shaft 40 in the radial direction of the retractable reel 50, and is used to abut against the wound pole piece. Therefore, the connecting flange 70 can be used to position and limit the wound pole piece, reducing the risk of the wound pole piece sliding randomly along the axial direction of the retractable reel 50, so that the two ends of the wound pole piece are more neat.

[0053] The present application also provides a pole piece manufacturing device, which includes the unwinding and reeling device 1 described in any one of the above embodiments, and the unwinding and reeling device 1 is used for unwinding or reeling the pole piece during the process of pole piece slitting or die cutting.

[0054] The pole piece manufacturing equipment in the present application has the effects described in any of the above embodiments, so it will not be repeated here.

[0055] The above-mentioned winding and unwinding device 1 and the pole piece manufacturing equipment are designed to be a pin wheel by designing the main gear 21. During the process of the pin wheel meshing and transmitting with the driven gear 22, the contact area between the pin teeth 212 of the pin wheel and the teeth of the driven gear 22 is reduced, so that the sliding friction between the pin teeth 212 of the pin wheel and the teeth of the driven gear 22 is reduced. In this case, the transmission efficiency and transmission stability are improved to a certain extent, so that the driving member 30 can accurately control the winding and unwinding reel 50 to unwind or rewind the pole piece, the pole piece tension is stable, and the pole piece processing quality is high.

[0056] The technical features of the above-described embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above-described embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0057] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be construed as limiting the scope of the patent application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the patent application shall be subject to the attached claims.

Claims

1. A reeling and unreeling device, characterized in that: The reeling and unwinding device comprises a driving member (30), a transmission shaft (40), a reeling and unwinding shaft (50) and a pin-tooth transmission pair (20), wherein the pin-tooth transmission pair (20) comprises a main gear (21) and a driven gear (22); The output end of the driving member (30) is connected to the main gear (21), the main gear (21) is meshedly connected to the driven gear (22), the driven gear (22) is connected to one end of the transmission shaft (40), and the other end of the transmission shaft (40) is connected to the retractable reel (50); Wherein, the main gear (21) is a pin gear.

2. The reeling and unreeling device according to claim 1, characterized in that: The main gear (21) is a pin wheel, and the main gear (21) comprises a base (211), a pin tooth (212) and a bearing (213). There are two bases (211), and the two bases (211) are arranged opposite to each other and at intervals. There are multiple pin teeth (212) and bearings (213). All the pin teeth (212) are arranged at intervals around the circumference of the base (211), and the pin teeth (212) are rotatably connected to the two bases (211) through the bearings (213).

3. The reeling and unreeling device according to claim 1, characterized in that: The reeling and unreeling device further comprises a support seat (10), wherein the support seat (10) comprises a support plate (11), a first side plate (12) and a second side plate (13), wherein the first side plate (12) and the second side plate (13) are spaced apart at opposite ends of the support plate (11); The transmission shaft (40) passes through the first side plate (12) and the second side plate (13), and has a first end and a second end protruding from the first side plate (12) and the second side plate (13) on two sides facing away from each other; the driven gear (22) is located on a side of the first side plate (12) facing away from the second side plate (13), and is connected to the first end; the retractable reel (50) is located on a side of the second side plate (13) facing away from the first side plate (12), and is connected to the second end.

4. The reeling and unreeling device according to claim 3, characterized in that: The driven gear (22) is arranged relative to the main gear (21) and close to the support plate (11).

5. The reeling and unreeling device according to claim 3, characterized in that: The support seat (10) also includes a mounting plate (14), wherein the mounting plate (14) is mounted on the first side plate (12) and is used to assemble the driving member (30).

6. The reeling and unreeling device according to claim 3, characterized in that: The reeling and unreeling device further comprises a protective sleeve (60), wherein the protective sleeve (60) is arranged on the support plate (11) and is located between the first side plate (12) and the second side plate (13); the protective sleeve (60) is sleeved outside the transmission shaft (40) and is spaced apart from the transmission shaft (40).

7. The reeling and unreeling device according to claim 3, characterized in that: The reeling and unwinding device further comprises a connecting flange (70), which is arranged on the side of the second side plate (13) facing away from the first side plate (12) and is used to connect the second end and the reeling and unwinding shaft (50).

8. The reeling and unreeling device according to claim 7, characterized in that: The connecting flange (70) protrudes from the peripheral side surface of the retractable reel (50) and the transmission shaft (40) in the radial direction of the retractable reel (50) and is used to abut against the wound pole piece.

9. The reeling and unreeling device according to claim 3, characterized in that: The first side plate (12), the second side plate (13) and the support plate (11) are integrally formed.

10. A pole piece manufacturing device, characterized in that It comprises a winding and unwinding device as described in any one of claims 1 to 9 above.

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