Punching machine needle with replaceable needle head

Abstract

The trepanning machine needle comprises the needle head and a needle rod, a sharp portion used for penetrating through cloth is arranged on the lower end face of the needle head, a plurality of knife edge portions are arranged on the sharp portion, the knife edge portions are arranged on the periphery of the sharp portion, grooves are formed by the knife edge portions and the sharp portion, and the needle head is detachably connected with the needle rod. The needle head is provided with an inclined groove used for discharging scraps, the upper end face of the needle head is provided with a connecting rod, the outer wall of the connecting rod is symmetrically provided with fixing grooves, protruding blocks are arranged in the fixing grooves, springs are arranged between the protruding blocks and the fixing grooves, one ends of the springs are connected with the inner walls in the fixing grooves, and the other ends of the springs are connected with the protruding blocks. Compared with the prior art, the needle head and the needle rod are detachably connected, when the needle head is abraded and needs to be scrapped, only the needle head needs to be detached, a new needle head needs to be replaced, and cost is greatly saved.

Description

Technical Field

[0001] The utility model relates to the technical field of cloth processing equipment, and more specifically, to a perforating machine needle with a replaceable needle head. Background Art

[0002] Composite fabric is a new type of material made by bonding one or more layers of textile materials, non-woven materials and other functional materials. It is suitable for making sofas, clothing and other textiles, and is one of the indispensable fabrics for people's home life. Composite fabrics apply the high technology and new materials of "new synthetic fibers" and have many excellent properties (compared with ordinary synthetic fibers), such as the fabric is fine, delicate, elegant, and warm. The fabric has a plump appearance, is windproof, and breathable, and has a certain waterproof function. Its main characteristics are warmth retention and good breathability. In some usage scenarios, it is usually necessary to punch holes. Since the toughness and strength of composite fabrics are relatively high, special hole punching machine needles are required.

[0003] For example, patent No. 202220676378.3 discloses a special hole-opening machine needle for composite fabrics, which adopts a two-end opening. When the tip is inserted into the fabric, the blade first cuts the fabric, and then the blade of the blade part squeezes and punches the fabric again, ensuring the hole-opening efficiency.

[0004] However, during use, the fabric will cause certain wear and tear on the needle, resulting in a decrease in the sharpness of the needle. At this time, the entire hole-punching machine needle needs to be replaced and scrapped, but the needle bar can still be used. The overall scrapping of the hole-punching machine needle increases production costs. Utility Model Content

[0005] In view of the shortcomings of the prior art, the purpose of the utility model is to provide a hole-opening machine needle with a replaceable needle head which reduces the use cost of the hole-opening machine.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A hole punching machine needle with a replaceable needle head comprises a needle head and a needle bar, wherein the lower end surface of the needle head is provided with a sharp portion for penetrating fabrics, the sharp portion is provided with a plurality of knife edges, the knife edges are arranged on the outer periphery of the sharp portion, the knife edges and the sharp portions form grooves, the needle head and the needle bar are detachably connected, and an inclined groove for discharging waste chips is provided on the needle head.

[0008] A connecting rod is provided on the upper end surface of the needle, and a fixing groove is symmetrically provided on the outer wall of the connecting rod. A convex block is provided in the fixing groove, and a spring is provided between the convex block and the fixing groove. One end of the spring is connected to the inner wall of the fixing groove, and the other end is connected to the convex block.

[0009] The end surface of the needle bar is provided with a mounting hole for the connecting rod to extend into, and the inner wall of the mounting hole is provided with a positioning hole for the protrusion to extend into corresponding to the protrusion.

[0010] The utility model is further configured as follows: a fixing hole penetrating the connecting rod is opened on one side of the fixing groove, a docking hole penetrating the needle rod is opened on the outer wall of the needle rod corresponding to the fixing hole, and the needle rod and the needle head are further fixed by a screw rod penetrating the fixing hole and the docking hole.

[0011] The utility model is further configured as follows: the end of the protrusion is hemispherical, a rubber sheet is adhered to the outer wall of the protrusion, and the end surface of the rubber sheet is inclined.

[0012] The utility model is further configured as follows: the connecting rod is hollow.

[0013] Compared with the shortcomings of the prior art, the beneficial effects of the utility model are:

[0014] The punching needle is divided into two parts: a needle head and a needle rod. The needle head and the needle rod are detachably connected. When the needle head is worn and needs to be scrapped, you only need to remove the needle head and replace it with a new one, which greatly saves costs. The connecting rod is hollow inside, which increases the structural strength of the needle rod while saving production costs. An oblique groove is provided on the needle head to receive fabric debris generated during the punching process to prevent the debris from blocking the groove formed between the blade and the sharp part, which would result in a reduction in cutting strength. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a cross-sectional view of the hole opening machine needle;

[0016] Figure 2 Schematic diagram of the bump structure.

[0017] Needle head 1, needle rod 2, sharp part 3, knife edge part 4, oblique groove 5, connecting rod 6, fixing groove 7, protrusion 8, spring 9, mounting hole 10, positioning hole 11, fixing hole 12, docking hole 13, screw rod 14, rubber sheet 15. DETAILED DESCRIPTION

[0018] Reference Figure 1 to Figure 2 The utility model is further described in detail.

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0021] A hole punching machine needle with a replaceable needle head comprises a needle head 1 and a needle rod 2. A sharp portion 3 for penetrating cloth is provided on the lower end face of the needle head 1. A plurality of blade portions 4 are provided on the sharp portion 3. The blade portions 4 are arranged on the outer periphery of the sharp portion 3. The blade portions 4 and the sharp portion 3 form grooves for facilitating all-round punching of cloth. A plurality of blade portions 4 and the sharp portion 3 simultaneously apply force to punch holes in the cloth.

[0022] The needle 1 and the needle rod 2 are detachably connected, so that the operator can replace the needle 1 according to the usage of the needle 1. The connecting rod 6 is hollow, which increases the structural strength of the needle rod 2 and saves production costs.

[0023] The needle head 1 is provided with an inclined groove 5 for discharging waste scraps, so as to prevent the cloth scraps from clogging the groove formed by the blade portion 4 and the sharp portion 3 during the punching process, thereby affecting the punching effect.

[0024] A connecting rod 6 is provided on the upper end surface of the needle 1, and a fixing groove 7 is symmetrically provided on the outer wall of the connecting rod 6. A protrusion 8 is provided in the fixing groove 7, and a spring 9 is provided between the protrusion 8 and the fixing groove 7. One end of the spring 9 is connected to the inner wall of the fixing groove 7 and the other end is connected to the protrusion 8. A mounting hole 10 for the connecting rod 6 to extend into is provided on the end surface of the needle rod 2, and a positioning hole 11 for the protrusion 8 to extend into is provided on the inner wall of the mounting hole 10 corresponding to the protrusion 8. The needle 1 is fixed to the needle rod 2 by extending the protrusion 8 into the positioning hole 11. The end of the protrusion 8 is hemispherical, and a rubber sheet 15 is adhered to the outer wall of the protrusion 8. The end face of the rubber sheet 15 is inclined, which increases the friction between the protrusion 8 and the inner wall of the positioning hole 11, making the connection between the two more stable.

[0025] A fixing hole 12 penetrating the connecting rod 6 is provided on one side of the fixing groove 7, and a docking hole 13 penetrating the needle rod 2 is provided on the outer wall of the needle rod 2 corresponding to the fixing hole 12. A screw rod 14 penetrating the fixing hole 12 and the docking hole 13 is used to further fix the needle rod 2 and the needle head 1.

[0026] Working principle: During installation, the protrusion 8 is squeezed inward. Since one end of the protrusion 8 is connected to a spring 9, when it is subjected to pressure, the spring 9 contracts inward, and the protrusion 8 is embedded in the fixing groove 7. At this time, the connecting rod 6 is extended into the installation hole 10. When the protrusion 8 moves to the positioning hole 11, under the elastic force of the spring 9, the protrusion 8 pops out from the fixing groove 7 and embeds into the positioning hole 11, connecting the needle body and the rod body. Subsequently, the screw 14 is passed through the fixing hole 12 and the connecting hole to further strengthen the fixation of the needle head 1 and the needle rod 2.

[0027] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any common changes and substitutions made by those skilled in the art within the technical solution of the present invention should be included in the protection scope of the present invention.

Claims

1. A perforating machine needle with a replaceable needle head, comprising a needle head (1) and a needle bar (2), wherein the lower end surface of the needle head (1) is provided with a sharp portion (3) for penetrating a cloth, the sharp portion (3) is provided with a plurality of cutting edges (4), the cutting edges (4) are arranged on the outer periphery of the sharp portion (3), the cutting edges (4) and the sharp portion (3) form a groove, and the characteristics are as follows: The needle head (1) is detachably connected to the needle rod (2), and the needle head (1) is provided with an inclined groove (5) for discharging waste chips. The upper end surface of the needle (1) is provided with a connecting rod (6), the outer wall of the connecting rod (6) is symmetrically provided with a fixing groove (7), a protrusion (8) is provided in the fixing groove (7), a spring (9) is provided between the protrusion (8) and the fixing groove (7), one end of the spring (9) is connected to the inner wall of the fixing groove (7) and the other end is connected to the protrusion (8), The end surface of the needle rod (2) is provided with a mounting hole (10) for the connecting rod (6) to extend into, and the inner wall of the mounting hole (10) is provided with a positioning hole (11) corresponding to the protrusion (8) for the protrusion (8) to extend into.

2. A perforating needle with a replaceable needle tip according to claim 1, characterized in that: A fixing hole (12) penetrating the connecting rod (6) is formed on one side of the fixing groove (7); a docking hole (13) penetrating the needle rod (2) is formed on the outer wall of the needle rod (2) corresponding to the fixing hole (12); and a screw rod (14) penetrating the fixing hole (12) and the docking hole (13) is used to further fix the needle rod (2) and the needle head (1).

3. A perforating needle with a replaceable needle tip according to claim 2, characterized in that: The end of the protrusion (8) is hemispherical, a rubber sheet (15) is adhered to the outer wall of the protrusion (8), and the end surface of the rubber sheet (15) is inclined.

4. A perforating needle with a replaceable needle tip according to claim 3, characterized in that: The connecting rod (6) is hollow.

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