WO2021196202A1

WO2021196202A1 - Shaft connecting device and lithium battery cell winding system

Info

Publication number: WO2021196202A1
Application number: PCT/CN2020/083301
Authority: WO
Inventors: 汤辉; 汤志为; 杨凯; 郑付成; 黄东海; 揭海林; 朱纬亚; 琚云东; 高云峰
Original assignee: 大族激光科技产业集团股份有限公司
Priority date: 2020-04-03
Filing date: 2020-04-03
Publication date: 2021-10-07
Also published as: CN215118994U

Abstract

The present invention relates to the technical field of shaft connection and, in particular, to a shaft connecting device and a lithium battery cell winding system. The shaft connecting device comprises a first shaft (100) having a first hole (101) and a second shaft (200) sleeved on the first shaft (100) and having a second hole (201), wherein the diameter of the second hole (201) is larger than the diameter of the first hole (101), and the second hole (201) and the first hole (101) are in communication and form a step structure when the second shaft (200) is sleeved on the first shaft (100). The shaft connecting device further comprises a step positioning pin (310) clamped in the step structure and a fixing member (320) fixed to the second hole (201) and abutting against the step positioning pin (310). The shaft connecting device has the advantageous effects that compared with the prior art, the formed step structure reduces the thickness of the first shaft (100), and especially, can make the first shaft (100) form a hollow structure, thereby meeting the space requirement of a large amount of wiring in the hollow structure; and in addition, the shaft connecting device can be compatible with shafts of different sizes, thereby improving the applicability of the shaft connecting device.

Description

Shaft connecting device and lithium battery cell winding system

Technical field

The utility model relates to the technical field of shaft connection, in particular to a shaft connection device and a lithium battery cell winding system.

Background technique

With the rapid development of the lithium battery industry, the integration of lithium battery cell winding equipment used to realize lithium battery cell winding is getting higher and higher, and it is also necessary to consider compatibility with different types and sizes of cells. When the compatible size becomes larger and larger, the size of the lithium battery cell winding equipment will continue to increase.

Therefore, in order to meet more and more functions of lithium battery cell winding equipment, more and more functional modules are integrated, and the size of the equipment will inevitably increase accordingly. Therefore, it has become one of the key requirements of mechanical equipment manufacturing at this stage that the size of the equipment must be controlled within a certain range while meeting more and more functions.

Therefore, when designing the structure of each component, it is necessary to not only realize the function, but also further optimize it. Through the compact structure design, the size of each component is reduced, and finally the size of the whole machine is reduced. It is a person skilled in the art. The key research problem, especially the connection structure between the shaft and the shaft, is also a crucial part.

technical problem

The technical problem to be solved by the present utility model is to provide a shaft connection device and a lithium battery cell winding system in view of the above-mentioned defects of the prior art to solve the problem that the existing integrated functional modules are also increasing, and the equipment size is inevitable. Correspondingly increase the problem.

Technical solutions

The technical solution adopted by the utility model to solve its technical problem is to provide a shaft connecting device, which includes a first shaft with a first hole and a second shaft sleeved on the first shaft and having a second hole. Two shafts, the diameter of the second hole is larger than the diameter of the first hole, and the second hole and the first hole communicate with each other and form a stepped structure when the second shaft is sleeved on the first shaft; the shaft connecting device is also The utility model comprises a step positioning pin clamped on the step structure, and a fixing member which is fixed at the second hole and abuts against the step positioning pin.

Among them, a preferred solution is that the second hole includes an internal thread structure, and the fixing member includes an external thread structure and is threadedly matched with the internal thread structure.

Among them, a preferred solution is that the step positioning pin includes a threaded groove, and the fixing member includes a threaded nail that can be inserted into the threaded groove.

Among them, a preferred solution is that the step positioning pin is in interference fit with the first hole and the second hole.

Among them, a preferred solution is that there are a plurality of the first hole and the second hole.

Among them, a preferred solution is: the second shaft includes a shaft body with a hollow structure in which the first shaft can be sleeved, the shaft body includes a covering part, a fixing part and a flange part, and the second hole is arranged in the Ministry.

Among them, a preferred solution is that: the hole diameter of the hollow structure of the covering portion and the fixing portion is smaller than the hole diameter of the hollow structure of the flange portion; the hollow structure of the flange portion is further provided with a limiting groove.

Among them, a preferred solution is that: a second shaft is sleeved on both sides of the first shaft, and both ends of the first shaft are provided with first holes.

The technical solution adopted by the utility model to solve its technical problem is to provide a lithium battery cell winding system. The lithium battery cell winding system includes the shaft connection device and a driving mechanism. It is connected with the second shaft of the shaft connecting device and drives the second shaft to rotate.

Beneficial effect

The beneficial effect of the present utility model is that compared with the prior art, the present utility model reduces the thickness of the first shaft through the stepped structure, especially the first shaft can be formed into a hollow structure, which satisfies a large number of routing space for the hollow structure. Requirements; At the same time, it can be compatible with shafts of different sizes to improve the applicability of the shaft connection device; at the same time, it can realize the shaft and shaft (first shaft and second shaft) connection structure with the smallest axial size (especially the optimization of the first shaft Size) in order to control the size of the device.

Description of the drawings

In the following, the utility model will be further described in conjunction with the accompanying drawings and embodiments. In the accompanying drawings:

Figure 1 is a schematic diagram of the front structure of the shaft connecting device of the present invention;

Figure 2 is a schematic view of the three-dimensional structure of the shaft connecting device of the present invention;

Figure 3 is a schematic cross-sectional structure diagram of the shaft connecting device of the present invention;

Fig. 4 is a schematic diagram of a partially enlarged cross-sectional structure of the shaft connecting device of the present invention.

The best mode of the present invention

The preferred embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

As shown in Figures 1 to 4, the present invention provides a preferred embodiment of a shaft connecting device. A shaft connecting device includes a first shaft 100 having a first hole 101 and a second shaft 200 sleeved on the first shaft 100 and having a second hole 201. The hole diameter is larger than the hole diameter of the first hole 101. The second hole 201 communicates with the first hole 101 when the second shaft 200 is sleeved on the first shaft 100 and forms a stepped structure, wherein the stepped structure is embedded by the fixing structure 300 , The fixation of the first shaft 100 and the second shaft 200.

The shaft connection device further includes a step positioning pin 310 clamped on the step structure, and a fixing member 320 fixed at the second hole 201 and abutting against the step positioning pin 310.

Specifically, the second shaft 200 is sleeved on the outer side of the first shaft 100, and after sleeved in place, the central axes of the first hole 101 and the second hole 201 overlap. The aperture of the second hole 201 is larger than the aperture of the first hole 101, forming a step structure; the step positioning pin 310 is clamped into the step structure to fix the first shaft 100 and the second shaft 200, wherein the step positioning The boss of the pin 310 is clamped into the first hole 101, and the table surface abuts against the outside of the first shaft 100; in order to prevent the step positioning pin 310 from falling off, on the outside of the step positioning pin 310 (outside the second hole 201), The fixing member 320 is fixed at the second hole 201 and abuts against the step positioning pin 310.

Among them, one end of the step positioning pin 310 is restricted by the first shaft 100 and the other end is restricted by the fixing member 320 to realize the positioning of the first shaft 100 and the second shaft 200. Through the constructed step structure, there is no need to provide thread structure and limit structure (such as bumps arranged along the edge, blocking block arranged at the bottom) on the first hole 101 of the first shaft 100, etc., so that the first The shaft 100 forms a hollow structure, and the thickness of the body does not need to be too thick, which meets the space requirement of a large number of wiring of the hollow structure; at the same time, it can be compatible with shafts of different sizes to realize a compact structure design.

At the same time, a shaft-to-shaft (first shaft 100 and second shaft 200) connection structure can be realized, with the smallest axial size (especially optimizing the size of the first shaft 100) in order to control the size of the device.

In this embodiment, the second hole 201 includes an internal thread structure, and the fixing member 320 includes an external thread structure and is threadedly matched with the internal thread structure. Specifically, the fixing ability of the fixing member 320 in the second hole 201 is improved through the threaded fit, and the distance between the fixing member 320 and the step positioning pin 310 can be adjusted to realize the zero distance (fitting) arrangement of the two. Of course, the fixing cooperation between the second hole 201 and the fixing member 320 may be other structures, such as a snap-fit structure, a nested structure, and so on. Further, the step positioning pin 310 includes a threaded groove, and the fixing member 320 includes a threaded nail that can be inserted into the thread groove, so as to optimize the stability of the step positioning pin 310 and the fixing member 320.

In this embodiment, the step positioning pin 310 is interference fit with the first hole 101 and the second hole 201. Since the first shaft 100 and the second shaft 200 need to be rotated when working, the interference fit of the three prevents axial sliding of the first shaft 100 and the second shaft 200, and improves the stability of the shaft connection device.

In this embodiment, there are multiple first holes 101 and second holes 201. Through positioning in multiple directions, stable positioning of the entire shaft surface is realized, and the stability of the shaft connecting device is improved. For example, a first hole 101 is provided at opposite ends of the first shaft 100 (the second hole 201 of the second shaft 200 is correspondingly provided), and the cross section of the first shaft 100 is divided into three, four, or even more first holes.孔101.

And, second shafts 200 are sleeved on both sides of the first shaft 100, first holes 101 are provided at both ends of the first shaft 100, and the second shafts 200 at both ends are aligned with the first The shaft 100 is fixed to form a shaft connection device.

In this embodiment, the second shaft 200 includes a shaft body with a hollow structure in which the first shaft 100 can be sleeved. The shaft body includes a covering portion 210, a fixing portion 220, and a flange portion 230. The hole 201 is provided on the fixing part 220. Specifically, the end of the shaft body of the second shaft 200 is also provided with a hollow structure that can be installed in cooperation with an external rotating mechanism (such as a motor rotating part), and the first shaft 100 is embedded in the hollow structure in the covering part 210 and the fixing part 220, The covering part 210 improves the surface coverage of the first shaft 100, improves the connection stability of the first shaft 100 and the second shaft 200, and reduces vibration during high-speed rotation; the fixing part 220 is thicker than the covering part 210, and the second hole 201 is provided On the fixing portion 220, the length of the step positioning pin 310 and the fixing member 320 can be appropriately increased, so as to improve the firmness of the step positioning pin 310 and the fixing member 320 and the stability of the connection to the second shaft 200; the covering portion 210 and The hole diameter of the hollow structure of the fixed part 220 is smaller than the hole diameter of the hollow structure of the flange part 230, which realizes the separation of the rotation part and the shaft part, further optimizes the overall structure, and realizes a compact design. In addition, the end face flange surface of the flange part 230 is convenient The connection with the external rotation mechanism facilitates the fixation of the second shaft 200 and improves its stability. In addition, the hollow structure of the flange portion 230 is also provided with a limiting groove to form a connection structure between the second shaft 200 and the external rotation mechanism.

In the present utility model, a preferred embodiment of a lithium battery cell winding system is provided.

A lithium battery cell winding system, the lithium battery cell winding system includes the shaft connection device and a driving mechanism, the driving mechanism is connected with the second shaft 200 of the shaft connection device, and drives the second shaft The shaft 200 rotates. The rotating part of the driving mechanism is connected to the second shaft 200 of the shaft connection device, and drives the second shaft 200 to rotate, thereby driving the first shaft 100 of the shaft connection device to rotate.

Preferably, a second shaft 200 is sleeved on both sides of the first shaft 100, and the second shaft 200 at the other end is connected with a follower portion, so that one end can rotate and the other end can follow.

It is suitable for all types of lithium battery winding equipment, and can also be extended to other mechanical equipment with a shaft-to-shaft connection structure. This is very conducive to the miniaturization and high integration of lithium battery winding equipment and other mechanical equipment. The production workshop accommodates more equipment and creates more production value with the smallest land space.

The above are only the best embodiments of the present utility model, and are not used to limit the scope of the present utility model. All equivalent changes or modifications made in accordance with the scope of the utility model's patent application are covered by the present utility model.

Claims

A shaft connection device, characterized in that: the shaft connection device comprises a first shaft with a first hole and a second shaft sleeved on the first shaft and having a second hole, and the second hole has a larger diameter than The aperture of the first hole, the second hole communicates with the first hole when the second shaft is sleeved on the first shaft and forms a stepped structure; the shaft connecting device further includes a stepped positioning pin clamped on the stepped structure, And a fixing part fixed at the second hole and abutting against the step positioning pin.
The shaft connection device according to claim 1, wherein the second hole includes an internal thread structure, and the fixing member includes an external thread structure and is threadedly matched with the internal thread structure.
The shaft connection device according to claim 2, wherein the step positioning pin includes a threaded groove, and the fixing member includes a threaded nail that can be inserted into the threaded groove.
The shaft connection device according to claim 1, wherein the step positioning pin is in interference fit with the first hole and the second hole.
The shaft connection device according to claim 1, wherein the first hole and the second hole are provided in multiples.
The shaft connection device according to any one of claims 1 to 5, wherein the second shaft includes a shaft body with a hollow structure in which the first shaft can be sleeved, and the shaft body includes a covering part, a fixing part and The flange part, the second hole is arranged on the fixing part.
The shaft connection device according to claim 6, wherein the hollow structure of the covering part and the fixing part has a hole diameter smaller than that of the hollow structure of the flange part; and the hollow structure of the flange part is further provided with a limiting groove.
The shaft connection device according to claim 1, wherein the second shaft is sleeved on both sides of the first shaft, and both ends of the first shaft are provided with first holes.
A lithium battery cell winding system, characterized in that: the lithium battery cell winding system comprises the shaft connection device according to any one of claims 1-8 and a drive mechanism, and the drive mechanism is connected to the shaft The second shaft of the device is connected and drives the second shaft to rotate.