CN219708376U - Winding core blanking needle clamping device - Google Patents

Abstract

The utility model relates to the technical field of battery cell production, in particular to a winding core blanking needle clamping device. The blanking needle clamping device comprises a needle clamping assembly and a thrust unit, wherein the needle clamping assembly comprises two clamping pieces which are symmetrically arranged, each clamping piece comprises an outer needle clamping and an inner needle clamping which are arranged at intervals, an installation space for installing a winding core is formed between each outer needle clamping and each inner needle clamping, and at least one of two opposite wall surfaces of each outer needle clamping and each inner needle clamping is a soft contact surface; the thrust unit is connected with the soft contact surface and is used for driving the soft contact surface to enable two opposite wall surfaces of the outer clamp needle and the inner clamp needle to be close to or far away from each other. The embodiment of the utility model provides a winding core blanking needle clamping device, which is used for solving the problem of folds and folds caused by uneven stress release during winding core clamping blanking in the related art.

Description

Winding core blanking needle clamping device

Technical Field

The utility model relates to the technical field of battery cell production, in particular to a winding core blanking needle clamping device.

Background

At present, in the battery industry, when an electrode assembly (the electrode assembly comprises a positive plate, a negative plate and a diaphragm) is wound to form an electric core, an elliptical winding needle is generally adopted by a winding machine, and after winding is completed, two corner parts of the winding core are required to be clamped by a blanking clamping needle for blanking.

However, in the prior art, most of the blanking pins are round rod-shaped pins or flat plate-shaped pins, and the surface of the pins contacting the corner portion of the winding core is a hard contact surface. Therefore, the clamping needle can damage the winding core; meanwhile, due to the fact that the shapes of the blanking clamp needle and the corner portion are not matched, the blanking stress of the coil core is unevenly released, and the problem of wrinkling and folding is easily caused. The problem is that microscopic defects such as short circuit, lithium precipitation and the like are easily formed by point discharge after high voltage is carried out in the subsequent working procedure of the battery, and finally the battery is caused to show performance such as poor K value, low capacity and the like and safety risks.

Disclosure of Invention

The embodiment of the utility model provides a winding core blanking needle clamping device, which aims to solve the problem of folds and folds caused by uneven stress release during winding core clamping and blanking in the related art.

In order to achieve the above object, the present utility model provides a winding core blanking needle clamping device, which comprises:

the clamping needle assembly comprises two clamping pieces which are symmetrically arranged, wherein each clamping piece comprises an outer clamping needle and an inner clamping needle which are arranged at intervals, an installation space for installing a winding core is formed between each outer clamping needle and each inner clamping needle, and at least one of two opposite wall surfaces of each outer clamping needle and each inner clamping needle is a soft contact surface;

and the pushing unit is connected with the soft contact surface and is used for driving the soft contact surface so that two opposite wall surfaces of the outer clamp needle and the inner clamp needle can be mutually close to or far away from each other.

In some embodiments, the outer clip needle inner cavity is hollow, and the soft contact surface comprises a first soft contact surface on the outer clip needle;

the thrust unit comprises a first thrust unit arranged in the inner cavity of the outer clamp needle, one end of the first thrust unit is fixed on the inner wall of the outer clamp needle, and the other end of the first thrust unit faces the first soft contact surface and can support the first soft contact surface.

In some embodiments, the first thrust unit comprises at least one first thrust unit, the first thrust unit comprises a first cylinder and a first supporting piece, one end of the first cylinder is fixed on the inner wall of the outer needle clamp, the other end of the first cylinder is connected with the first supporting piece, and the first cylinder drives the first supporting piece to move along the direction towards or away from the inner needle clamp.

In some embodiments, the shape of the side of the first support facing the first soft contact surface matches the shape of the outer sidewall of the winding core, such that the first soft contact surface conforms to the outer sidewall when the first support moves toward the first soft contact surface.

In some embodiments, the first thrust unit further comprises a first thrust rod connected between the first cylinder and the first support.

In some embodiments, a first spring is sleeved on the first thrust rod, and two ends of the first spring are respectively abutted to the first cylinder and the first supporting piece.

In some embodiments, the inner needle cavity is hollow, and the soft contact surface includes a second soft contact surface on the inner needle;

the thrust unit comprises a second thrust unit arranged in the inner clamping needle, one end of the second thrust unit is fixed on the inner wall of the inner clamping needle, and the other end of the second thrust unit is arranged towards the second soft contact surface.

In some embodiments, the second thrust unit includes a second cylinder and a second support, the second support is disposed towards an end near the second soft contact surface, the second cylinder is connected to an end of the second support away from the second soft contact surface, and the second cylinder drives the second support to move in a direction towards or away from the second soft contact surface.

In some embodiments, a shape of a face of the second support facing the second soft contact surface matches a shape of an inner sidewall of the winding core such that the second soft contact surface conforms to the inner sidewall when the second support moves toward the second soft contact surface.

In some embodiments, two clamping motors are respectively connected with the two clamping pieces and used for driving the clamping pieces to move.

The technical scheme provided by the utility model has the beneficial effects that:

the embodiment of the utility model provides a winding core blanking needle clamping device, as two clamping pieces which are symmetrically arranged are provided, each clamping piece comprises an outer clamping needle and an inner clamping needle, one of two wall surfaces of each outer clamping needle and each inner clamping needle is a soft contact surface, the soft contact surface can adapt to the shape of a winding core and cannot damage the winding core, meanwhile, an installation space for installing the winding core is arranged between each outer clamping needle and each inner clamping needle, the winding core is arranged in the installation space, the inner wall of the winding core can be under the tension of the inner clamping needle, the occurrence of wrinkles is reduced, the outer wall of the winding core can be under the pressure of the outer clamping needle, and the wrinkles possibly generated can be smoothed to a certain extent;

because the clamping pieces are provided with two groups, the two inner clamping needles and the two outer clamping needles are respectively arranged on the inner wall of the winding core, namely the two inner clamping needles are positioned on the long axis of the ellipse, and the outer clamping needles are positioned on the extension line of the long axis, the installation space is enlarged or reduced by pushing or shrinking the thrust unit;

when the inner clamping needle and the outer clamping needle are pushed by the thrust unit to move towards the opposite direction, the winding core is simultaneously subjected to internal tension and external pressure, so that the clamping action has an additional shaping function, and the correct plasticity of the winding core corner can be helped, and therefore, the problems of wrinkling and folding caused by uneven release of the winding core clamping blanking stress in the related art can be solved.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present utility model, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a top view of a blanking pin holder provided in an embodiment of the present utility model;

FIG. 2 is a schematic diagram illustrating the cooperation between a set of clamping members and a winding core according to an embodiment of the present utility model;

FIG. 3 is a perspective view showing the positional relationship between an inner clip needle and an outer clip needle according to an embodiment of the present utility model;

FIG. 4 is an interior perspective view of an inner clip needle provided in an embodiment of the present utility model;

fig. 5 is a schematic diagram of cooperation between a blanking pin clamping device including a clamping motor and a winding core according to an embodiment of the present utility model.

In the figure: 1. a winding core; 2. a clamping member; 3. an outer clip needle; 31. a first soft contact surface; 4. an inner clip needle; 41. a second soft contact surface; 5. an installation space; 6. a first thrust unit; 61. a first cylinder; 62. a first thrust rod; 63. a first support; 64. a first spring; 7. a second thrust unit; 71. a second cylinder; 72. a second thrust rod; 73. a second support; 74. a second spring; 8. clamping the motor; 9. a lifting motor; 91. an outer needle clamping lifting motor; 92. an inner needle clamping lifting motor; 10. a translation motor; 11. a main body portion; 12. corner portions; 121. an inner sidewall; 122. an outer sidewall.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be clear that the winding core 1 formed by elliptical winding is generally of the shape illustrated in fig. 1. The winding core comprises a main body part 11 and two corner parts 12 positioned at two sides of the main body part. Each corner 12 has an inner side wall 121 and an outer side wall 122 disposed opposite to each other, and in the present utility model, the inner side wall 121 of the corner is defined as a side wall near the center of the winding core 1; naturally, the outer side wall 122 is a side wall remote from the center of the winding core 1.

The embodiment of the utility model provides a winding core blanking needle clamping device which can solve the problem of folds and folds caused by uneven stress release of winding core clamping blanking in the related art.

Referring to fig. 1 to 5, an embodiment of the present utility model provides a winding core blanking needle device, which includes a needle assembly and a thrust unit, wherein the needle assembly includes two symmetrically disposed clamping members 2, and, in combination with fig. 1, the clamping members 2 include an outer needle 3 and an inner needle 4 which are disposed at intervals, and an installation space 5 as shown in fig. 3 is formed between the outer needle 3 and the inner needle 4, and in use, the winding core 1 is installed in the installation space 5.

Further, at least one of the two opposite wall surfaces of the outer clamping needle 3 and the inner clamping needle 4 is a soft contact surface, and the thrust unit is in contact with the soft contact surface, so that the two opposite wall surfaces of the outer clamping needle 3 and the inner clamping needle 4 can be mutually close to or far away from each other, the size change of the installation space 5 is realized, the winding core 1 enters or leaves the installation space 5, and meanwhile, the soft contact surface can not damage the winding core 1.

It should be clear that the "soft contact surface" in the present utility model can be defined as: at least one of the two opposite wall surfaces of the outer clip needle 3 and the inner clip needle 4 can be deformed under the action of the thrust unit, so that the two opposite wall surfaces of the outer clip needle 3 and the inner clip needle 4 can be close to or far from each other.

When the thrust unit drives the soft contact surface to enable the two opposite wall surfaces of the outer clamping needle 3 and the inner clamping needle 4 to be far away from each other, the installation space 5 is enlarged, so that the winding core 1 smoothly enters or exits; when the pushing unit pushes the soft contact surface to enable the two opposite wall surfaces of the outer clamping needle 3 and the inner clamping needle 4 to be close to each other, the winding core 1 is limited in the installation space 5, and the blanking of the winding core 1 can be performed.

The embodiment of the utility model provides a winding core blanking needle clamping device, as two symmetrically arranged clamping pieces 2 are provided, the clamping pieces 2 comprise an outer clamping needle 3 and an inner clamping needle 4, one of two opposite wall surfaces of the outer clamping needle 3 and the inner clamping needle 4 is a soft contact surface, the soft contact surface can adapt to the shape of a winding core 1 and cannot damage the winding core 1, meanwhile, an installation space 5 for installing the winding core 1 is arranged between the outer clamping needle 3 and the inner clamping needle 4, the winding core 1 is arranged in the installation space 5, the inner wall of the winding core can be under the tension of the inner clamping needle 4, the occurrence of wrinkles is reduced, the outer wall of the winding core can be under the pressure of the outer clamping needle 3, and the wrinkles possibly generated can be smoothed to a certain extent.

Since there are two clamping members 2, there are two inner clamping pins 4 and two outer clamping pins 3, respectively. Specifically, the two inner clamping pins 4 are respectively located at the inner side walls 121 of the two corner portions 12 of the winding core 1, the two outer clamping pins 3 are respectively located at the outer side walls 122 of the two corner portions of the winding core 1, so that the winding core 1 is integrally shown in fig. 1, that is, the two inner clamping pins 4 are located on the long axis of the ellipse, and meanwhile, the outer clamping pins 3 are located on the extension line of the long axis, and the installation space 5 is enlarged or reduced by pushing or shrinking of the thrust unit.

When the inner clamping needle 4 and the outer clamping needle 3 are pushed by the thrust unit to move towards the opposite directions, the winding core 1 is simultaneously subjected to internal tension and external pressure, so that the clamping action is accompanied with a shaping function, and the correct plasticity of the corner 12 of the winding core 1 can be helped, and therefore, the problem of fold and discount caused by uneven release of the clamping and blanking stress of the winding core 1 in the related art can be solved.

In some alternative embodiments, see fig. 2 and 3, the thrust unit is provided on the outer clip needle 3:

as shown in fig. 2 and 3, the inner cavity of the outer clip needle 3 is hollow, the inner cavity is used for arranging a thrust unit, and the soft contact surface is a first soft contact surface 31 positioned on the outer clip needle 3;

further, the thrust unit comprises a first thrust unit arranged in the inner cavity of the outer clamping needle 3, one end of the first thrust unit is fixed on the inner wall of the outer clamping needle 3, the other end of the first thrust unit is arranged towards the first soft contact surface 31 and can support the first soft contact surface 31, and the first soft contact surface 31 is close to or far away from the wall surface, opposite to the inner clamping needle 4, of the outer clamping needle 3 through the telescopic first thrust unit.

Further, referring to fig. 2 and 3, the first thrust unit includes at least one first thrust unit 6, the first thrust unit 6 includes a first cylinder 61 and a first support 63, one end of the first cylinder 61 is fixed on the inner wall of the outer clip needle 3, and the other end is connected to the first support 63, and the first cylinder 61 drives the first support 63 to move in a direction toward or away from the inner clip needle 4.

Specifically, as shown in fig. 3, the first soft contact surface 31 is in a circular arc shape to form the installation space 5, and meanwhile, the shape of the first support member 63 is consistent with that of the first soft contact surface 31, and is also in a circular arc shape to form a support for the first soft contact surface 31, meanwhile, the first support member 63 is driven by the expansion and contraction of the first cylinder 61 to prop up the first soft contact surface 31 or loosen the first soft contact surface 31, the first support member 63 may be in a sheet shape, and the shape of the surface of the first support member 63 facing the first soft contact surface 31 is adapted to the shape of the outer side wall 122, so that when the first support member 63 props up the first soft contact surface 31, the first soft contact surface 31 can be attached to the outer side wall 122, so that the force for clamping the corner portion of the winding core 1 is provided, and the corner portion of the winding core 1 is clamped and shaped by the profiling shape. Preferably, when the first cylinder 61 travels to the maximum stroke, the first soft contact surface 31 can be tightly attached to the outer side wall 122, i.e., each portion of the first soft contact surface 31 can be completely attached to the outer side wall 122.

The present utility model provides a preferred embodiment, namely, the outer needle 3 is provided with three first thrust units 6 as shown in fig. 2, and the three first thrust units 6 are uniformly distributed in the outer needle 3 at intervals, so that the first supporting piece 63 is uniformly contacted with the first soft contact surface 31, and the force application is relatively average; alternatively, the coaxial arrangement of the first cylinder 61 and the first support 63 facilitates the exertion of force.

Specifically, the three first thrust units 6 are divided into three directions to form a support for the first soft contact surface 31, and along the expansion and contraction direction of each first cylinder 61, as shown in fig. 2 and 3, with the intersection point of the major axis and the minor axis of the elliptical winding core 1 as a midpoint, the expansion and contraction directions of the three first thrust units 6 may form three central lines, the extension lines of the three central lines intersect at the midpoint, and the extension lines of the three central lines and the minor axis of the elliptical winding core 1 form included angles of 30 °, 90 ° and 150 ° respectively; and the projections of the three first supports 63 on the outer side wall 122 should have a small partially overlapping position, the design purpose is: providing a shaping action to the outer side wall 122 when clamping the winding core 1 and protecting the outer side wall 122 from damage.

Optionally, the surface shape of the side of the three first supporting members 63 near the first soft contact surface 31 should be matched with the shape of the outer side wall 122, so that when the first supporting members 63 support the first soft contact surface 31, the first soft contact surface 31 can be closely attached to the outer side wall 122, and the design purpose is that: providing better shaping during clamping.

And, the first support 63 should be mounted taking into account the relative distance of the stroke of the first cylinder 61 from the corner 12 of the winding core 1, so that the stroke of the first cylinder 61 has a shaping effect on the corner 12 of the winding core 1 during clamping and does not cause damage to the winding core 1 due to too close proximity to the winding core 1.

It should be noted that, the first soft contact surface 31 should be made of a soft contact material with relatively strong soft toughness, and the material of the first soft contact surface 31 may be plastics, rubber, teflon, etc., which functions as follows: the clamping shaping force is provided, and the first supporting piece 63 is prevented from being directly contacted with the winding core 1, so that the protection and soft contact effects are realized; optionally, the first soft contact surface 31 is kept smooth by more than 1.0 on the side of the winding core 1;

further, the material of the first soft contact surface 31 does not include a metal material.

Further, the surface of the first soft contact surface 31 may be further provided with a surface plating layer, wherein the material of the surface plating layer does not include a metal-based material.

Optionally, the first thrust unit further includes a first thrust rod 62, where the first thrust rod 62 is connected between the first cylinder 61 and the first support 63, and the first cylinder 61 performs a telescopic motion along an axial direction thereof, and the first support 63 is used for transmitting a telescopic force of the first cylinder 61.

Further, a first spring 64 is sleeved on the first thrust rod 62, and two ends of the first spring 64 are respectively abutted against the first cylinder 61 and the first support 63; the first spring 64 provides a buffering capacity when the first cylinder 61 expands and contracts so as not to hurt the winding core 1 by the first cylinder 61 with a large force.

In some alternative embodiments, see fig. 2-4, a thrust unit is provided on the inner needle 4:

as shown in fig. 2 to 4, the inner cavity of the inner clip needle 4 is hollow, the inner cavity is used for arranging a thrust unit, and the soft contact surface is a second soft contact surface 41 positioned on the inner clip needle 4;

further, the thrust unit comprises a second thrust unit 7 arranged in the inner clamping needle 4, one end of the second thrust unit 7 is fixed on the inner wall of the inner clamping needle 4, the other end of the second thrust unit is arranged towards the second soft contact surface 41 and is contacted with the second soft contact surface 41 to support the second soft contact surface 41, and the second soft contact surface 41 is close to or far away from the wall surface of the inner clamping needle 4 opposite to the outer clamping needle 3 through the telescopic second thrust unit 7.

Further, as shown in fig. 2 and 3 in combination, the second thrust unit 7 includes a second cylinder 71 and a second support 73, and in the group of clamps 2, the second support 73 is disposed toward the second soft contact surface 41, the second cylinder 71 is connected to an end of the second support 73 away from the second soft contact surface 41, and the second cylinder 71 drives the second support 73 to move in a direction toward or away from the outer clamp needle 3.

Specifically, as shown in fig. 3, in the group of holders 2, the second soft contact surface 41 can be protruded toward the side where the outer clip needle 3 is located by the pushing of the second pushing unit 7 to support the winding core 1 sleeved on the inner clip needle 4, and as such, the shape of the surface of the second support 73 near the side of the second soft contact surface 41 should be adapted to the shape of the inner side wall 121 so that the second soft contact surface 41 can be fitted to the outer side wall 122 when the second support 73 supports the second soft contact surface 41, which functions to clamp and shape the corner 12 of the winding core 1 by the profiling shape. Preferably, when the second cylinder 71 travels to the maximum stroke, the second soft contact surface 41 can be closely attached to the inner side wall 121, i.e., each portion of the second soft contact surface 41 can be completely attached to the inner side wall 121.

Alternatively, the second thrust unit 7 includes a second thrust rod 72, the second thrust rod 72 is connected between the second cylinder 71 and a second support 73, the second cylinder 71 performs telescopic movement along its axial direction, and the second support 73 is used for transmitting telescopic force of the second cylinder 71.

Further, a second spring 74 is sleeved on the second thrust rod 72, and two ends of the second spring 74 are respectively abutted against the second cylinder 71 and the second support 73; the second spring 74 provides a buffering capacity when the second cylinder 71 expands and contracts so as not to hurt the winding core 1 by the second cylinder 71 with a large force.

Note that, when the second cylinder 71 is mounted to the second spring 74, the relative distance between the maximum stroke of the second cylinder 71 and the corner 12 of the winding core 1 should be noted, so that the stroke of the second thrust unit 7 has a shaping effect on the corner 12 of the winding core 1 in the clamped state, and the winding core 1 is not damaged due to too close to the winding core 1.

In some preferred embodiments, as shown in fig. 2 to 4, the thrust unit is provided on both the outer needle 3 and the inner needle 4:

as shown in fig. 2 to 4, the inner cavities of the outer clamping needle 3 and the inner clamping needle 4 are hollow, and are respectively used for setting the first thrust unit 6 and the second thrust unit 7, meanwhile, the outer clamping needle 3 is provided with a first soft contact surface 31, and the inner clamping needle 4 is provided with a second soft contact surface 41.

It can be known that the thrust units in the outer clamping needle 3 and the inner clamping needle 4 can be used for laminating the clamping piece 2 and the corner of the winding core 1 through the stamping operation of the air cylinder, so that the clamping operation is completed, and after the winding core 1 reaches the logistics belt, the air cylinder is decompressed, so that the clamping piece 2 is contracted to recover to the original state, and the inner clamping needle 4 is pulled out.

In particular, the first thrust unit 6 comprises a first support 63 for supporting the first soft contact surface 31 and the second thrust unit 7 comprises a second support 73 for supporting the second soft contact surface 41, wherein the first support 63 and the second support 73 are curved, shaped to follow or resemble the shape of the corner 12 of the winding core 1, and a better shaping is obtained when clamping.

In some alternative embodiments, referring to fig. 5, the blanking pin apparatus further includes two clamping motors 8, where the two clamping motors 8 are respectively connected to the two clamping members 2 and are used to drive the clamping members 2 to move, clamp the winding core 1 or release the winding core 1.

Specifically, as shown in fig. 5, the holding motor 8 includes a lifting motor 9 and a translation motor 10, and the lifting motor 9 is connected to the holding member 2; in the embodiment, the lifting motor 9 comprises an outer clamping needle lifting motor 91 and an inner clamping needle lifting motor 92, wherein the outer clamping needle lifting motor 91 is connected with the outer clamping needle 3, the inner clamping needle lifting motor 92 is connected with the inner clamping needle 4, and the lifting of the outer clamping needle 3 and the inner clamping needle 4 is controlled respectively to enable the inner clamping needle 4 to deviate from or clamp the winding core 1; specifically, the outer needle lift motor 91 and the inner needle lift motor 92 move up and down in the arrow direction shown in fig. 5;

further, a translation motor 10 is connected to the holders 2 for controlling the distance between the two holders 2 to accommodate winding cores 1 of different sizes, specifically, the translation motor 10 moves in the direction of the arrow shown in fig. 5 to bring the two holders 2 toward or away from each other.

Specifically, the working steps of the blanking needle clamping device are as follows: the clamping piece 2 is moved to the blanking position of the winding core 1 through the cooperation of the lifting motor 9 and the translation motor 10, the first thrust unit 6 and the air cylinder in the second thrust unit 7 work in a stamping mode, the soft contact surface is attached to the corner 12 of the winding core 1, and the clamping work is completed; when the winding core is required to be taken out, the cylinder is used for decompressing, the soft contact surface is far away from the wall surface of the outer clamping needle 3 opposite to the inner clamping needle 4, the installation space 5 is further enlarged, and finally the outer clamping needle 3 and the inner clamping needle 4 are dislocated through the moving cooperation of the lifting motor 9, so that the winding core 1 is taken out.

In the description of the present utility model, it should be noted that the azimuth or positional relationship indicated by the terms "upper", "lower", etc. are based on the azimuth or positional relationship shown in the drawings, and are merely for convenience of describing the present utility model and simplifying the description, and are not indicative or implying that the apparatus or element in question must have a specific azimuth, be constructed and operated in a specific azimuth, and thus should not be construed as limiting the present utility model. Unless specifically stated or limited otherwise, the terms "mounted," "connected," and "coupled" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model can be understood by those of ordinary skill in the art according to the specific circumstances.

It should be noted that in the present utility model, relational terms such as "first" and "second" and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Moreover, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one … …" does not exclude the presence of other like elements in a process, method, article, or apparatus that comprises the element.

The foregoing is only a specific embodiment of the utility model to enable those skilled in the art to understand or practice the utility model. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the utility model. Thus, the present utility model is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims (10)

1. The utility model provides a roll up core unloading needle holder device which characterized in that, it includes:

the clamping needle assembly comprises two clamping pieces (2) which are symmetrically arranged, wherein each clamping piece (2) comprises an outer clamping needle (3) and an inner clamping needle (4) which are arranged at intervals, an installation space (5) for installing a winding core (1) is formed between each outer clamping needle (3) and each inner clamping needle (4), and at least one of two opposite wall surfaces of each outer clamping needle (3) and each inner clamping needle (4) is a soft contact surface;

and the thrust unit is connected with the soft contact surface and is used for driving the soft contact surface so that two opposite wall surfaces of the outer clamping needle (3) and the inner clamping needle (4) can be close to or far away from each other.

2. The core blanking pin apparatus of claim 1, wherein:

the inner cavity of the outer clamp needle (3) is hollow, and the soft contact surface comprises a first soft contact surface (31) positioned on the outer clamp needle (3);

the thrust unit comprises a first thrust unit arranged in the inner cavity of the outer clamp needle (3), one end of the first thrust unit is fixed on the inner wall of the outer clamp needle (3), and the other end of the first thrust unit faces the first soft contact surface (31) and can form support for the first soft contact surface (31).

3. The core blanking pin apparatus of claim 2, wherein:

the first thrust unit comprises at least one first thrust unit (6), the first thrust unit (6) comprises a first air cylinder (61) and a first supporting piece (63), one end of the first air cylinder (61) is fixed on the inner wall of the outer clamping needle (3), the other end of the first air cylinder is connected with the first supporting piece (63), and the first air cylinder (61) drives the first supporting piece (63) to move along the direction towards or away from the inner clamping needle (4).

4. A core blanking pin apparatus as claimed in claim 3, wherein:

the shape of the first support piece (63) facing the first soft contact surface (31) is matched with the shape of the outer side wall (122) of the winding core (1), so that when the first support piece (63) moves towards the first soft contact surface (31), the first soft contact surface (31) is attached to the outer side wall (122).

5. A core blanking pin apparatus as claimed in claim 3, wherein:

the first thrust unit further comprises a first thrust rod (62), and the first thrust rod (62) is connected between the first cylinder (61) and the first support piece (63).

6. The core blanking pin apparatus of claim 5, wherein:

the first thrust rod (62) is sleeved with a first spring (64), and two ends of the first spring (64) are respectively abutted to the first cylinder (61) and the first supporting piece (63).

7. A winding core blanking pin apparatus according to claim 1 or 2, characterized in that:

the inner cavity of the inner clamping needle (4) is hollow, and the soft contact surface comprises a second soft contact surface (41) positioned on the inner clamping needle (4);

the thrust unit comprises a second thrust unit (7) arranged in the inner clamping needle (4), one end of the second thrust unit (7) is fixed on the inner wall of the inner clamping needle (4), and the other end of the second thrust unit is arranged towards the second soft contact surface (41).

8. The core blanking pin apparatus of claim 7, wherein:

the second thrust unit (7) comprises a second air cylinder (71) and a second supporting piece (73), the second supporting piece (73) is arranged towards one end close to the second soft contact surface (41), the second air cylinder (71) is connected to one end, far away from the second soft contact surface (41), of the second supporting piece (73), and the second air cylinder (71) drives the second supporting piece (73) to move along the direction towards or far away from the second soft contact surface (41).

9. The core blanking pin apparatus of claim 8, wherein:

the shape of the surface of the second support piece (73) facing the second soft contact surface (41) is matched with the shape of the inner side wall (121) of the winding core (1), so that the second soft contact surface (41) is attached to the inner side wall (121) when the second support piece (73) moves towards the second soft contact surface (41).

10. The core blanking pin apparatus of claim 1, further comprising:

and the two clamping motors (8) are respectively connected with the two clamping pieces (2) and are used for driving the clamping pieces (2) to move.