Winding needle expansion structure

Abstract

The utility model relates to a winding needle expansion structure which comprises a winding needle A and a winding needle B. The front end of the winding needle A is provided with a telescopic rod, the front end of the winding needle B is provided with a hollow column for the telescopic rod to stretch in, a plurality of expansion assemblies are arranged between the telescopic rod and the hollow column, and each expansion assembly comprises a sleeving sliding ring, an expansion sliding block and an expansion block. A telescopic rod is installed on the outer side of the winding needle A, a sleeving sliding ring is installed on the peripheral side of the telescopic rod, an inclined sliding groove is formed in the sleeving sliding ring, the inner end of an expansion sliding block is installed in the inclined sliding groove in a sliding mode, the outer end of the expansion sliding block is connected with an expansion block, a movable groove is formed in the hollow column, and the expansion block is located in the movable groove. After the whole winding needle enters the core rod, when the telescopic rod drives the sleeving sliding ring to move, the sleeving sliding ring drives the expansion block to stretch out of or retract into the movable groove through cooperation of the inclined sliding groove and the expansion sliding block, the stretching expansion block expands the interior of the core rod, the winding needle can drive the core rod to move together when moving, and stability and reliability are achieved.

Description

Technical Field

[0001] The utility model relates to the field of lithium battery manufacturing equipment, and particularly relates to a needle expanding and tightening structure for winding needles. Background Art

[0002] At present, the central holes of lithium battery cells on the market are relatively small, easy to deform, and usually cannot meet the process requirements of the cells. Keeping the central hole of the cell unchanged is important for the cell. For example, the central hole of a cylindrical battery helps with exhaust, allowing the gas generated inside the battery to be discharged smoothly, thereby reducing the pressure inside the battery and preventing the battery from exploding violently. At the same time, this hole also promotes heat dissipation, better dissipating the heat generated when the battery is working. Another example is that by inserting a steel needle into the central hole of a cylindrical battery, the performance of the battery can be improved because the instability of the internal structure of the battery may lead to poor electrode contact, affecting the conductivity and energy transmission efficiency of the battery. Therefore, the applicant wants to develop a lithium battery winding machine. The main idea of this machine is to use a mandrel inserted into the central hole of the cell to make it not easily deform. Among them, how to make the winding needle cooperate with the hollow mandrel so that the winding needle can drive the mandrel when winding is the key. Therefore, it is necessary to develop a needle expanding and tightening structure for winding needles. Summary of the Utility Model

[0003] In view of the above-mentioned defects existing in the prior art, the utility model provides a needle expanding and tightening structure for winding needles, and the specific technical solution is as follows:

[0004] A needle expanding and tightening structure for winding needles includes a winding needle A and a winding needle B. An expansion rod is provided at the front end of the winding needle A, and a hollow column for the expansion rod to extend into is provided at the front end of the winding needle B. A plurality of expanding and tightening components are provided between the expansion rod and the hollow column. Each expanding and tightening component includes a tightening sliding ring, an expanding sliding block, and an expanding block. The tightening sliding ring is installed on the outer peripheral side of the expansion rod. The tightening sliding ring is provided with an inclined sliding groove. The inner end of the expanding sliding block is slidably inserted into the inclined sliding groove. The outer end of the expanding sliding block is connected to the expanding block. The hollow column is provided with a movable groove. The expanding block is located in the movable groove. When the expansion rod drives the tightening sliding ring to move, the tightening sliding ring drives the expanding block to extend or retract into the movable groove through the cooperation of the inclined sliding groove and the expanding sliding block.

[0005] As a preferred solution of the utility model, a large ring spacer sleeve and a small ring spacer sleeve are installed on the outer peripheral side of the expansion rod. The large ring spacer sleeve separates two adjacent tightening sliding rings, and the small ring spacer sleeve prevents the frontmost tightening sliding ring from coming off.

[0006] As a preferred solution of the utility model, a limit screw is installed on the front thread of the expansion rod, and the limit screw presses against the limit small ring spacer sleeve

[0007] As a preferred solution of the utility model, a non-circular through groove is provided inside the tightening sliding ring, and the non-circular through groove is inserted into the expansion rod.

[0008] As a preferred embodiment of the present utility model, the front end of the inclined chute is high and the rear end is low.

[0009] As a preferred embodiment of the present utility model, there are multiple inclined chutes and they are circumferentially distributed around the central axis of the sleeve sliding ring.

[0010] As a preferred embodiment of the present utility model, the cross-sectional shape of the inclined chute is arc-shaped.

[0011] As a preferred embodiment of the present utility model, the expansion block is integrally installed with the expansion sliding block through screws.

[0012] Beneficial effects: The needle winding tightening structure of the present utility model is reasonably designed. In the initial state, the telescopic rod of the A needle winding extends into the hollow column of the B needle winding. When the whole needle winding enters the inside of the mandrel, when the telescopic rod drives the sleeve sliding ring to move, the sleeve sliding ring drives the expansion block to extend or retract into the movable groove through the cooperation of the inclined chute and the expansion sliding block. The extended expansion block tightens the inside of the mandrel, so that the needle winding can drive the mandrel to move together during movement, which is stable and reliable. Description of the Drawings

[0013] Figure 1 is the exploded view of the present utility model;

[0014] Figure 2 is the structural sectional view of the A needle winding of the present utility model;

[0015] Figure 3 is the three-dimensional view of the cooperation between the A needle winding and the tightening assembly of the present utility model;

[0016] Figure 4 is the three-dimensional view of the B needle winding of the present utility model;

[0017] Figure 5 is the structural sectional view of the B needle winding of the present utility model;

[0018] Figure 6 is the three-dimensional view of the tightening assembly of the present utility model;

[0019] Figure 7 is the working flow chart of the present utility model. Detailed Embodiments

[0020] The following further describes the detailed embodiments of the present utility model in conjunction with the drawings:

[0021] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the indicated position or element must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.

[0022] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installation", "connection", and "coupling" 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 directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0023] As Figures 1 to 7 shown, a needle expanding and tightening structure includes a roll needle A 1 and a roll needle B 2. A telescopic rod 3 is provided at the front end of the roll needle A 1, and a hollow column 4 for the telescopic rod 3 to extend into is provided at the front end of the roll needle B 2. A plurality of tightening components are provided between the telescopic rod 3 and the hollow column 4. Each tightening component includes a tightening sliding ring 5, a tightening sliding block 6, and a tightening block 7. The tightening sliding ring 5 is installed on the outer peripheral side of the telescopic rod 3. The tightening sliding ring 5 is provided with an inclined chute 51. The inner end of the tightening sliding block 6 is slidably inserted into the inclined chute 51. The outer end of the tightening sliding block 6 is connected to the tightening block 7. The hollow column 4 is provided with a movable groove 8. The tightening block 7 is located in the movable groove 8. When the telescopic rod 3 drives the tightening sliding ring 5 to move; the tightening sliding ring 5 drives the tightening block 7 to extend or retract into the movable groove through the cooperation of the inclined chute 51 and the tightening sliding block 6.

[0024] As Figure 3 shown, a large ring spacer sleeve 9 and a small ring spacer sleeve 10 are installed on the outer peripheral side of the telescopic rod 3. The large ring spacer sleeve 9 separates two adjacent tightening sliding rings 5. The large ring spacer sleeve 9 abuts against two adjacent tightening sliding rings 5 to prevent displacement. The small ring spacer sleeve 10 prevents the frontmost tightening sliding ring 5 from coming off. A limit screw 11 is installed on the front thread of the telescopic rod 3. The limit screw 11 presses against the limit small ring spacer sleeve 10, thereby determining the positions of each tightening sliding ring 5.

[0025] As Figure 6 shown, a non-circular through groove 12 is provided inside the tightening sliding ring 5. The non-circular through groove 12 is inserted into the telescopic rod 3. When the roll needle rotates, it can drive the tightening sliding ring 5 to rotate. In addition, the front end of the inclined chute 51 is high and the rear end is low. In this way, when the tightening sliding ring 5 moves back and forth, the tightening block 7 moves in a direction perpendicular to the axis of the roll needle, completing the action of expanding and fixing the mandrel.

[0026] Specifically, there are multiple inclined grooves 51 and they are distributed around the circumference of the central axis of the tightening sliding ring 5. In this embodiment, one tightening sliding ring 5 is provided with three inclined grooves 51. Correspondingly, one tightening sliding ring 5 is configured with three expansion sliding blocks 6 and three expansion blocks 7 to expand the inner wall of the core rod from three directions.

[0027] Specifically, the cross-sectional shape of the inclined slide groove 51 is arc-shaped, so that the tightening sliding block 6 cannot directly disengage from the inclined slide groove 51 by moving upward, and the tightening block 7 is installed integrally with the tightening sliding block 6 by screws 13, and the tightening block 7 is placed in the movable groove 8, and the inner diameter of the movable groove 8 is slightly larger than the tightening block 7.

[0028] like Figure 7 As shown, the working principle of the utility model is as follows: first, the telescopic rod 3 of the winding needle A 1 is extended into the hollow column of the winding needle B 2 to the front position, so that the winding needles A and B form a winding needle (at this time, the expansion block 7 is in the retracted state), and then a cylinder or other power can be used to drive the winding needle as a whole to enter the core rod (the core rod is also hollow), and then other cylinders can be used to drive the winding needle A 1 to move backward alone. When the tightening sliding ring 5 moves backward, the expansion block 7 is driven to extend out of the movable groove through the cooperation of the inclined sliding groove 51 and the expansion sliding block 6, thereby expanding the core rod to meet production requirements.

[0029] The above content is a further detailed description of the utility model in combination with specific preferred implementation methods. It cannot be determined that the specific implementation of the utility model is limited to these descriptions. For ordinary technicians in the technical field to which the utility model belongs, without departing from the concept of the utility model, they can also make several simple deductions or substitutions, which should be regarded as belonging to the protection scope of the utility model.

Claims

1. A coiling needle expansion structure, comprising a coiling needle A and a coiling needle B, characterized in that: A front end of the A coiling needle is provided with a telescopic rod, a front end of the B coiling needle is provided with a hollow column for the telescopic rod to extend into, and a plurality of expansion components are arranged between the telescopic rod and the hollow column. Each expansion component includes a tightening sliding ring, an expansion sliding block and an expansion block. The tightening sliding ring is installed on the outer peripheral side of the telescopic rod. The tightening sliding ring is provided with an inclined chute. The inner end of the expansion sliding block is slidably inserted into the inclined chute. The outer end of the expansion sliding block is connected to the expansion block. The hollow column is provided with a movable groove. The expansion block is located in the movable groove. When the telescopic rod drives the tightening sliding ring to move, the tightening sliding ring drives the expansion block to extend or retract into the movable groove through the cooperation of the inclined chute and the expansion sliding block.

2. The needle roller expanding structure according to claim 1, characterized in that: A large circular ring spacer sleeve and a small circular ring spacer sleeve are installed on the outer peripheral side of the telescopic rod. The large circular ring spacer sleeve separates two adjacent tightening sliding rings, and the small circular ring spacer sleeve prevents the frontmost tightening sliding ring from coming off.

3. The needle roller expanding structure according to claim 2, wherein: A limit screw is installed on the front end of the telescopic rod by means of threads, and the limit screw presses against the limit small circular ring spacer sleeve.

4. A kind of roll needle expansion structure according to claim 1 or 2, characterized in that: A non-circular through groove is arranged inside the tightening sliding ring, and the non-circular through groove is inserted into the telescopic rod.

5. The needle roller expanding and tightening structure according to claim 1, characterized in that: The front end of the inclined chute is high and the rear end is low.

6. The needle roller expanding structure according to claim 1 or 5, characterized in that: There are a plurality of the inclined chutes, and they are distributed circumferentially around the central axis of the tightening sliding ring.

7. The needle roller expanding structure according to claim 6, characterized in that: The cross-sectional shape of the inclined chute is arc-shaped.

8. A kind of roll needle expansion structure according to claim 1, characterized in that: The expansion block is integrally installed with the expansion sliding block by means of a screw.

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