A kind of retention device
Technical field
The utility model relates to technical field of battery production more particularly to a kind of retention devices.
Background technique
With the development of science and technology, the application demand of battery is increasing, wherein coiling type lithium battery is as a kind of important
Battery kind, the market demand are also increasing.In order to adapt to the big demand in market, it is necessary to realize the automatic of coiling type lithium battery
Metaplasia produces.And in prior art automated production, when not can guarantee volume needle disengaging core, core core will not be in friction masterpiece
With lower extraction, when especially diaphragm has electrostatic in wrapup procedure, in this way, seriously reducing the quality and production of coiling type lithium battery
Product qualification rate.
Utility model content
In view of this, core quality and product when being detached from core the purpose of this utility model is to provide a kind of guarantee volume needle
The retention device of qualification rate.
In order to achieve the above objectives, the utility model uses following technical scheme:
A kind of retention device, the separation of the coiled strip for rolling up needle and being wound on the volume needle, including blocking portion, the resistance
Stopper can fix position in the axial direction of the coiled strip, with when the volume needle is along the axial movement of the coiled strip to the volume
Material is stopped, so that the coiled strip and the volume needle be separated.
Preferably, the blocking portion includes blocking surface, when the volume needle is along the axial movement of the coiled strip, the coiled strip
End face be resisted against on the blocking surface.
Preferably, the blocking portion includes arcuate structure, and the arcuate structure includes opposite in the axial direction of the coiled strip
The first side wall and second sidewall, the first side wall form the blocking surface.
Preferably, the blocking portion includes two arcuate structures, and the blocking portion includes two arcuate structures
At least rounding state mutually drawn close of the opening state that is located remotely from each other of one end and two arcuate structures at least one end, described
The end face of rounding state, the coiled strip can be resisted against on the blocking surface.
Preferably, the arcuate structure is switched to described beat by the rounding state under gravity or biasing member effect
Open state.
Preferably, the arcuate structure further includes limiting section, and the limiting section is used to limit the arcuate structure in institute
State opening state.
Preferably, the limiting section includes confined planes, and opposite end face forms institute to two arcuate structures in the circumferential
State confined planes.
Preferably, the retention device further includes mounting portion, and the blocking portion is rotatablely installed by the mounting portion.
Preferably, the mounting portion includes the mounting hole or mounting groove being arranged on the arcuate structure, the installation
Hole or the mounting groove penetrate through the first side wall and the second sidewall.
Preferably, the retention device further includes the force section being connected with the arcuate structure, and the force section can be
Drive the arcuate structure from the opening state to be switched to rounding state under the action of the volume needle so that the coiled strip against
On the blocking surface.
Preferably, the force section is elongated, one end of the elongated force section and one end phase of the arcuate structure
Even.
Preferably, the arcuate structure includes holding part, and the holding part is for accommodating and another described arcuate structure
The connected force section.
In the retention device of the utility model, the blocking portion can be when rolling up needle along the axial movement of the coiled strip to institute
When stating coiled strip to be stopped, and then guaranteeing that the volume needle is detached from from the coiled strip, the core of the coiled strip will not be made to rub
It is extracted under power effect, and then improves the quality and product qualification rate of the coiled strip.
Detailed description of the invention
By referring to the drawings to the description of the utility model embodiment, the above-mentioned and other mesh of the utility model
, feature and advantage will be apparent from.
Fig. 1 is knot of the retention device in the arcuate structure in the open state in specific embodiment of the present invention
Structure schematic diagram;
Fig. 2 be in specific embodiment of the present invention retention device the arcuate structure be in rounding state stop institute
State structural schematic diagram when coiled strip.
In figure:
1, blocking portion;11, blocking surface;12, arcuate structure;121, the first side wall;122, second sidewall;123, limiting section;
1231, confined planes;124, holding part;125, third side wall;126, the 4th side wall;
2, mounting portion;21, mounting hole;22, pin shaft;
3, force section;31, force-applying piece;
4, needle is rolled up;
5, coiled strip.
Specific embodiment
The utility model is described below based on embodiment, it should be understood by one skilled in the art that mentioning herein
The attached drawing of confession is provided to the purpose of explanation, and attached drawing is not necessarily drawn to scale.
Unless the context clearly requires otherwise, "include", "comprise" otherwise throughout the specification and claims etc. are similar
Word should be construed as the meaning for including rather than exclusive or exhaustive meaning;That is, be " including but not limited to " contains
Justice.
Shown in referring to Figures 1 and 2, the utility model provides a kind of retention device, for rolling up needle 4 and wound on volume needle 4
Coiled strip 5 separation, coiled strip 5 for example can be the battery core of lithium battery, and retention device installation may be implemented automatic on the winder
Metaplasia produces.
As illustrated in fig. 1 and 2, retention device includes blocking portion 1, and blocking portion 1 can be fixed position in the axial direction of coiled strip 5,
To stop when rolling up needle 4 along the axial movement of coiled strip 5 to coiled strip 5, so that coiled strip 5 and volume needle 4 be separated, guarantee volume needle 4
When being detached from from coiled strip 5, the core of coiled strip 5 will not be made to be extracted under frictional force effect, and then improve the quality and production of coiled strip 5
Product qualification rate.
Blocking portion 1 includes arcuate structure 12, and as illustrated in fig. 1 and 2, arcuate structure 12 includes opposite in the axial direction of coiled strip 5
The first side wall 121 and second sidewall 122, arcuate structure 12 further include opposite on the radially consistent direction with coiled strip 5
Third side wall 125 and the 4th side wall 126, third side wall 125 and the 4th side wall 126 are preferably a part on cylindrical surface, i.e. arc
Structure 12 is formed as fanning annular plate-like or fans annular strip structure, and the first side wall 121 forms blocking surface 11, in volume needle 4 along coiled strip
When 5 axial movement, the end face of coiled strip 5 is resisted against on blocking surface 11, and blocking surface 11 only stops the end face of coiled strip 5, resistance
Block face 11 preferably fans planar annular, at this point, the outer diameter of blocking surface 11 is preferably greater than or equal to the outer diameter of coiled strip 5, blocking surface 11
Internal diameter is preferably equal to or is slightly less than the internal diameter of coiled strip 5.In a specific embodiment, the internal diameter of blocking surface 11 is slightly less than coiled strip 5
Internal diameter, volume needle 4 have elasticity, blocking surface 11 and volume needle 4 between there is no interference problems.
Retention device further includes mounting portion 2, as shown in Fig. 2, blocking portion 1 is rotatablely installed by mounting portion 2, mounting portion 2 is excellent
Choosing includes that perhaps the extending direction of the axis of mounting groove mounting hole 21 or mounting groove is consistent with the axis of coiled strip 5 for mounting hole 21,
Perhaps mounting hole 21 is arranged on arcuate structure 12 in mounting groove to mounting hole 21 or mounting groove penetrates through the first side wall 121 and second
Side wall 122 makes the rotational installation of blocking portion 1 on the winder by the pin shaft 22 in insertion mounting hole 21 or mounting groove, tears open
It fills easy to maintenance.
Blocking portion 1 includes two arcuate structures 12, and blocking portion 1 includes what two arcuate structures 12 at least one end was located remotely from each other
The rounding state that opening state and two arcuate structures 12 at least one end are mutually drawn close, as illustrated in fig. 1 and 2, in rounding state, volume
The end face of material 5 can be resisted against on blocking surface 11, and the third side wall 125 of two arcuate structures 12 is oppositely arranged, at this point, arc knot
The third side wall 125 of structure 12 coats volume needle 4 along the circumferential of coiled strip 5, and in opening state, the end face of coiled strip 5 is not against blocking
4th side wall 126 in face 11, arcuate structure 12 is preferably oppositely arranged, and arcuate structure 12 passes through the pin shaft that is arranged in mounting hole 21
22 rotations are realized to be switched between rounding state and opening state, wherein arcuate structure 12 is acted in gravity or biasing member
Under opening state is switched to by rounding state, not only reduce energy consumption, and ensure that the reset of arcuate structure 12.Arc
Shape structure 12 further includes limiting section 123, and limiting section 123 includes confined planes 1231, it is preferable that two arcuate structures 12 are in the circumferential
Opposite end face forms confined planes 1231, and confined planes 1231 are preferably provided to the plane with the radial intersection of arcuate structure 12,
Opening state, the confined planes 1231 on two arcuate structures 12 lean, so that the limit of one of arcuate structure 12
Face 1231 can limit another arcuate structure 12 in opening state, and the confined planes 1231 of two arcuate structures 12 are respectively to another
One arcuate structure 12 is limited, to guarantee that arcuate structure 12 is in the open state.
Retention device further includes the force section 3 being connected with arcuate structure 12, and force section 3 includes force-applying piece 31, such as Fig. 1 and 2
It is shown, force-applying piece 31 be it is elongated, one end of elongated force-applying piece 31 is connected with one end of arcuate structure 12, and force section 3 can be
Arcuate structure 12 is driven to turn to rounding state so that coiled strip 5 is resisted against blocking surface 11 from opening state under the action of volume needle 4
On.In opening state, force-applying piece 31 is arranged in a crossed manner, and volume needle 4 is moved down along the radial direction of coiled strip 5, and the lateral wall of volume needle 4 acts on force
On part 31, and then moving down with volume needle 4, so that the angle between two force-applying pieces 31 becomes larger, between force-applying piece 31
Angle becomes larger, and blocking portion 1 is rotated around pin shaft 22, so that two arcuate structures 12 are gradually collapsed will roll up needle 4 and coat, preferably
Ground, force section 3 and blocking portion 1 are integrally formed or are welded together, and arcuate structure 12 further includes holding part 124, an arc
Holding part 124 in shape structure 12 is for accommodating the force-applying piece 31 being connected with another arcuate structure 12, in this way, working as force-applying piece
When angle between 31 becomes larger, force-applying piece 31 will not influence the smoothly cladding volume needle 4 of blocking portion 1, and then guarantee that volume needle 4 is detached from coiled strip
After 5, the quality of coiled strip 5.The force section 3 being preferably located on same arcuate structure 12 and holding part 124 are along mounting hole 21
The extending direction of axial direction or mounting groove arrangement, and the arrangement side for the force section 3 and holding part 124 being arranged on two arcuate structures 12
Formula is just on the contrary, so that force section 3 can smoothly be accommodated in holding part 124 when arcuate structure 12 is in rounding state.
The course of work of the retention device of the utility model:The winding of coiled strip 5 is completed, and two arcuate structures 12 are in gravity
Under it is in the open state, when volume needle 4 is moved down along the radial direction of coiled strip 5, the lateral wall card of volume needle 4 lean against two force-applying pieces 31 from
By on end, as volume needle 4 continues to move down along the radial direction of coiled strip 5, force-applying piece 31 drives arcuate structure 12 under the action of rolling up needle 4
It is rotated together around pin shaft 22, so that the arc-shaped depression portion of arcuate structure 12 coats volume needle 4 along the circumferential of coiled strip 5, at this point,
Arcuate structure 12 is in rounding state, and when rolling up needle 4 along the axial movement of coiled strip 5, the end face of coiled strip 5 is resisted against arcuate structure 12
The first side wall 121 on, prevent coiled strip 5 with volume needle 4 movement and move so that volume needle 4 be detached from from coiled strip 5, roll up needle
4 continue along coiled strip 5 move axially to volume needle 4 lateral wall and force section 3 do not block by when, arcuate structure 12 is in self gravity
Under the action of rotated backward around pin shaft 22 so that arcuate structure 12 is in the open state, complete the de- of a secondary volume needle 4 and coiled strip 5
From.
The retention device structure of the utility model is simple, meets the needs of automated production, dismounts easy to maintain and helps
In raising 5 mass of coiled strip and qualification rate.
Those skilled in the art will readily recognize that above-mentioned each preferred embodiment can be free under the premise of not conflicting
Ground combination, superposition.
The above is only the preferred embodiment of the present invention, is not intended to limit the utility model, for this field
For technical staff, the utility model can have various modifications and changes.All institutes within the spirit and principle of the utility model
Any modification, equivalent substitution, improvement and etc. of work, should be included within the scope of protection of this utility model.