Durable punching needle

Abstract

The utility model relates to the technical field of automobile part production, and discloses a durable punch pin which comprises a pin rod and a pin head which are integrally connected, a movable cavity is formed in the pin rod, a through hole communicated with the movable cavity is formed in the pin head, a push rod which moves in a reciprocating mode in the length direction of the pin rod is connected in the movable cavity in a sliding mode, and the push rod is connected with the pin rod. The push rod can penetrate through the through hole and extend outwards. In the punching and withdrawing process of the punching needle, the push rod can be ejected out in the movable cavity in the length direction of the needle rod and push waste materials located at the end of the needle head outwards, so that the waste materials are prevented from being taken back, meanwhile, the waste materials can be pushed towards a certain direction in a directional mode, and the situation that the waste materials fly around and influence the surrounding working environment is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of automobile parts production, and particularly relates to a durable punch pin. Background Art

[0002] Automobile parts, as the foundation of the automobile industry, are necessary factors to support the sustainable and healthy development of the automobile industry. Especially the current independent development and innovation in the automobile industry, which is in full swing, requires a strong parts system as support.

[0003] When producing automobile parts, a punch pin is usually used for processing. A flanging hole with certain size and strength requirements is processed on the wall part of the automobile part by the punch pin, and the flanging hole is usually used as the bottom hole for connecting threads. The conventional punch pin includes a needle rod and a needle head. The needle head is a cylinder, and its bottom is a flat structure. When processing with this kind of needle head, the needle head is easy to bring back waste after punching. Due to the backhaul effect of the needle head, the brought-back waste scatters everywhere, affecting the surrounding working environment and not being easy to be centrally cleaned manually.

[0004] Secondly, since the end of the needle head directly impacts on the automobile part every time the needle head impacts the automobile part, after long-term impact use, the end of the needle head is easy to wear, thus affecting the service life of the needle head; if the punch pin is not replaced in time, it is also easy to result in a low finished product rate of punching due to the wear degree of the end of the needle head, which cannot meet the actual production needs. Summary of the Utility Model

[0005] The utility model aims to provide a durable punch pin that can prevent waste from being brought back when the needle rod is retracted.

[0006] To achieve the above object, each aspect of the present application can be implemented in one or more of the following embodiments:

[0007] 1) A durable punch pin, comprising a needle rod and a needle head integrally connected. An activity chamber is arranged in the needle rod, and a through hole communicating with the activity chamber is arranged in the needle head. A push rod that reciprocates along the length direction of the needle rod is slidably connected in the activity chamber, and the push rod can pass through the through hole and extend outwards.

[0008] The needle bar designed by the present utility model has a movable chamber, and the needle head is communicated with the movable chamber and has a through hole, so that the integrally connected needle bar and needle head are of a hollow structure as a whole, thereby reducing the weight of the entire punching needle, saving materials and being convenient to install; at the same time, when punching holes with the punching needle, the push rod in the movable chamber of the needle bar will be squeezed and retracted to the position of the through hole of the needle head; during the process of withdrawing the punching needle after punching, the push rod can eject in the movable chamber along the length direction of the needle bar and push the waste material at the end of the needle head outward, thereby preventing the waste material from being brought back, and at the same time, the waste material can be pushed in a certain direction, reducing the scattering of the waste material everywhere and affecting the surrounding working environment.

[0009] 2) For a durable punching needle according to 1), wherein:

[0010] A retaining cylinder is sleeved on the outer surface of the needle head, the retaining cylinder can reciprocate along the length direction of the needle head, and several fixing structures are evenly distributed along the circumferential direction of the retaining cylinder, and all the fixing structures can synchronously lock the retaining cylinder on the outer surface of the needle head.

[0011] The retaining cylinder designed by the present utility model can adjust the punching thickness of the needle head according to the thickness of the automotive parts. When the thickness of the automotive parts is relatively narrow, by moving the retaining cylinder gradually closer to the punching end of the needle head, the exposed thickness of the needle head is made equal to the thickness of the automotive parts. After determining the position of the retaining cylinder, all the fixing structures of the retaining cylinder along the circumferential direction are sequentially used to lock the retaining cylinder on the outer surface of the needle head, so that the force on the front part of the needle head can be offset by the retaining cylinder, thereby prolonging the service life of the needle head.

[0012] 3) For a durable punching needle according to 1), wherein:

[0013] There is also an adapter cylinder between the needle bar and the needle head. The two ends of the adapter cylinder are respectively detachably connected to the needle bar and the needle head. The longitudinal section of the adapter cylinder is of an isosceles trapezoid structure. The adapter cylinder has a connecting hole connecting the connecting movable chamber and the through hole. The longitudinal section of the connecting hole is of an isosceles trapezoid structure, and the inner diameter of the through hole is equal to the diameter of the push rod.

[0014] The present utility model uses an adapter cylinder to connect the needle bar and the needle head, thereby increasing the overall length of the punching needle. At the same time, the adapter cylinder serves as a demarcation section between the needle bar and the needle head and is detachably connected to the needle bar and the needle head. In this way, the needle head can be directly replaced after being damaged, thereby saving the materials of the punching needle.

[0015] At the same time, the connecting hole provided in the adapter cylinder connects the connecting movable chamber and the through hole, which is convenient for the push rod to sequentially pass through the connecting hole and the through hole and eject outward along the length direction of the needle bar. The inner diameter of the through hole is equal to the diameter of the push rod, so as to use the through hole to limit the ejection position of the push rod, ensuring that the push rod can accurately eject and push out the waste material after the punching needle completes punching.

[0016] 4) A durable punch pin according to 1), wherein:

[0017] A return spring is provided in the movable chamber. One end of the return spring is fixed to the inner end wall of the movable chamber, and the other end is fixed with a slider. The slider can reciprocate along the length direction of the needle rod. The side surface of the slider away from the return spring is fixedly connected to the push rod.

[0018] The utility model utilizes the elastic potential energy of the return spring to push the slider to move outward along the length direction of the needle rod. The slider drives the push rod to extend outward along the length direction of the needle rod. In this way, the waste material is pushed out through the push rod, avoiding the punch pin from bringing back the waste material; during processing, the push rod is subjected to the punching impact force and returns to the through hole of the needle tip, which is convenient for the punch pin to perform punching processing.

[0019] 5) A durable punch pin according to 2), wherein:

[0020] A rubber ring is embedded on the inner ring of the retaining cylinder. The rubber ring is sleeved on the outer surface of the needle tip. The retaining cylinder is provided with several mounting holes arranged in the radial direction along its circumferential direction. The mounting holes correspond to the fixing structures one by one. The fixing structures pass through the mounting holes and push the rubber ring to closely adhere to the outer surface of the needle tip, so that the inner ring of the rubber ring fits and fixes with the outer surface of the needle tip.

[0021] In the utility model, the rubber ring is sleeved on the outer surface of the needle tip, and the friction force between the two realizes the preliminary fitting and fixing of the retaining cylinder and the needle tip; in order to strengthen the fixing of the retaining cylinder on the outer surface of the needle tip, the fixing structures pass through the mounting holes on the retaining cylinder and push the rubber ring to closely adhere to the outer surface of the needle tip, so as to realize the fitting and fixing of the inner ring of the rubber ring and the outer surface of the needle tip, more firmly fixing the position of the retaining cylinder, avoiding the movement of the retaining cylinder due to the force during the impact of the needle tip, so that the force on the front part of the needle tip can be offset by the retaining cylinder, thereby prolonging the service life of the needle tip.

[0022] 6) A durable punch pin according to 5), wherein:

[0023] The fixing structure includes an extrusion block arranged in the mounting hole. The extrusion block can move up and down along the axis direction of the mounting hole. The surface of the extrusion block facing the needle tip can abut against the outer ring of the rubber ring.

[0024] When the extrusion block designed in the utility model moves downward along the axis direction of the mounting hole, the extrusion block will gradually approach the rubber ring and abut against the rubber ring. Since the surface contact between the extrusion block and the rubber ring increases the friction force between the two, and at the same time, the extrusion force of the extrusion block is transmitted to the outer surface of the needle tip through the rubber ring, further fixing the retaining cylinder on the outer surface of the needle tip.

[0025] 7) A durable punch pin according to 6), wherein:

[0026] The installation hole includes a movable hole and a threaded hole communicating with the movable hole. The inner diameter of the movable hole is twice that of the inner diameter of the threaded hole. The movable hole allows the extrusion block to move up and down along its axis. A threaded rod is threadedly connected in the threaded hole. The threaded rod moves up and down along its axis and can abut against the extrusion block.

[0027] The installation hole designed by the utility model is formed by combining a movable hole and a threaded hole to form an inverted T-shaped structure. At the same time, the extrusion block is located in the movable hole and moves up and down in the axial direction of the movable hole. Therefore, when the extrusion block is not subjected to a force, the extrusion block will not exert an extrusion force on the rubber ring; when the threaded rod moves downward along the axis of the threaded hole, the threaded rod passes through the threaded hole and pushes the extrusion block in the movable hole to move towards the rubber ring, thereby realizing the extrusion and fixation of the rubber ring by the extrusion block.

[0028] 8) A durable punch needle according to 1), wherein:

[0029] A needle cap is fixed at the end of the needle rod away from the needle tip. The needle cap in the utility model facilitates the installation of the punch needle.

[0030] Compared with the prior art, the technical principle and technical effect of the utility model are as follows:

[0031] The utility model increases a connecting cylinder between the needle rod and the needle tip, and uses the connecting cylinder to improve the strength of the punch needle so that it is not easy to break; in addition, the movable chamber provided in the needle rod, the connecting hole provided in the connecting cylinder, and the through hole provided in the needle tip make the punch needle achieve the characteristic of light weight, and a push rod that reciprocates along the length direction of the needle rod is provided in the movable chamber of the needle rod. The push rod uses the elastic potential energy of the return spring to achieve the characteristic of ejecting waste. It prevents the needle tip from carrying waste when punching automotive parts, resulting in the incomplete discharge of the punching waste of automotive parts and solving the problem of the needle tip bringing back waste. BRIEF DESCRIPTION OF THE DRAWINGS

[0032] Figure 1 It is a schematic structural diagram of a durable punch needle of the utility model. DETAILED DESCRIPTION OF THE INVENTION

[0033] The following is further detailed through specific embodiments:

[0034] The reference numerals in the accompanying drawings of the specification include: needle rod 1, connecting cylinder 2, needle tip 3, push rod 4, movable chamber 5, slider 6, return spring 7, needle cap 8, retaining cylinder 9, threaded rod 10, extrusion block 11, rubber ring 12.

[0035] Reference will now be made in detail to the embodiments disclosed by the present utility model. The examples disclosed by the present utility model are described herein and illustrated in the accompanying drawings. Although the present disclosure will be described in conjunction with embodiments and / or examples, they do not limit the present disclosure to these embodiments and / or examples. On the contrary, the present utility model disclosure covers alternatives, modifications, and equivalents.

[0036] In, for example Figure 1 In the embodiment generally shown, a durable punch pin includes a needle bar 1 and a needle tip 3 that are integrally connected. A needle cap 8 is fixed to the end of the needle bar 1 away from the needle tip 3. The use of the needle cap 8 facilitates the installation of the punch pin. An active chamber 5 is provided in the needle bar 1, and a through hole communicating with the active chamber 5 is provided in the needle tip 3. A push rod 4 that reciprocates along the length direction of the needle bar 1 is slidably connected in the active chamber 5. The push rod 4 can pass through the through hole and extend outwards.

[0037] In the needle bar 1 designed in this embodiment with the active chamber 5, and the needle tip 3 having a through hole communicating with the active chamber 5, the integrally connected needle bar 1 and needle tip 3 are of a hollow structure as a whole, thereby reducing the weight of the entire punch pin, saving materials and being easy to install. At the same time, when the punch pin punches a hole, the push rod 4 in the active chamber 5 of the needle bar 1 will be squeezed and retracted to the position of the through hole of the needle tip 3. During the process of withdrawing the punch pin after punching, the push rod 4 can be ejected in the active chamber 5 and along the length direction of the needle bar 1, and push the waste material at the end of the needle tip 3 outwards, thereby preventing the waste material from being brought back. At the same time, it can also push the waste material in a certain direction, reducing the waste material from flying around and affecting the surrounding working environment.

[0038] Among them, in this embodiment, there is also an adapter tube 2 between the needle bar 1 and the needle tip 3. The two ends of the adapter tube 2 are detachably connected to the needle bar 1 and the needle tip 3 respectively. The longitudinal section of the adapter tube 2 is in an isosceles trapezoid structure. A connection hole connecting the active chamber 5 and the through hole is provided in the adapter tube 2. The longitudinal section of the connection hole is in an isosceles trapezoid structure. The inner diameter of the through hole is equal to the diameter of the push rod 4.

[0039] The adapter tube 2 is used to connect the needle bar 1 and the needle tip 3, thereby increasing the overall length of the punch pin. At the same time, the adapter tube 2 serves as a demarcation section between the needle bar 1 and the needle tip 3 and is detachably connected to the needle bar 1 and the needle tip 3. In this way, the needle tip 3 can be directly replaced after it is damaged, thereby saving punch pin materials.

[0040] At the same time, the connection hole provided in the adapter tube 2 connects the active chamber 5 and the through hole, which facilitates the push rod 4 to sequentially pass through the connection hole and the through hole and eject outwards along the length direction of the needle bar 1. The inner diameter of the through hole is equal to the diameter of the push rod 4, so as to use the through hole to limit the ejection position of the push rod 4, ensuring that the push rod 4 can accurately eject and push out the waste material after the punch pin completes punching.

[0041] On the other hand, a return spring 7 is provided inside the movable chamber 5. One end of the return spring 7 is fixed to the inner end wall of the movable chamber 5, and the other end is fixed with a slider 6. The slider 6 can reciprocate along the length direction of the needle bar 1. The side surface of the slider 6 away from the return spring 7 is fixedly connected to the push rod 4.

[0042] In this embodiment, the elastic potential energy of the return spring 7 is utilized to push the slider 6 to move outward along the length direction of the needle bar 1. The slider 6 drives the push rod 4 to extend outward along the length direction of the needle bar 1. In this way, the waste material is pushed out by the push rod 4, avoiding the needle punching from bringing back the waste material; during processing, the push rod 4 is subjected to the punching impact force and returns to the through hole of the needle tip 3, which is convenient for the needle punching to perform punching processing.

[0043] As another preferred solution, in this embodiment, a retaining cylinder 9 is sleeved on the outer surface of the needle tip 3. The retaining cylinder 9 can reciprocate along the length direction of the needle tip 3. A plurality of fixing structures are evenly distributed along the circumferential direction of the retaining cylinder 9, and all the fixing structures can synchronously lock the retaining cylinder 9 on the outer surface of the needle tip 3.

[0044] The designed retaining cylinder 9 can adjust the punching thickness of the needle tip 3 according to the thickness of the automotive parts. When the thickness of the automotive parts is relatively narrow, by moving the retaining cylinder 9 gradually closer to the punching end of the needle tip 3, the exposed thickness of the needle tip 3 is made equal to the thickness of the automotive parts. After determining the position of the retaining cylinder 9, all the fixing structures of the retaining cylinder 9 along the circumferential direction are used to lock the retaining cylinder 9 on the outer surface of the needle tip 3 in sequence. In this way, the force on the front part of the needle tip 3 can be offset by the retaining cylinder 9, thereby prolonging the service life of the needle tip 3.

[0045] A rubber ring 12 is embedded on the inner ring of the retaining cylinder 9. The rubber ring 12 is sleeved on the outer surface of the needle tip 3. The retaining cylinder 9 is provided with a plurality of mounting holes arranged in the radial direction along its circumferential direction, and the mounting holes correspond to the fixing structures one by one. The fixing structures pass through the mounting holes and push the rubber ring 12 to closely adhere to the outer surface of the needle tip 3, so that the inner ring of the rubber ring 12 is fixedly attached to the outer surface of the needle tip 3.

[0046] In this embodiment, the rubber ring 12 is sleeved on the outer surface of the needle tip 3, and the frictional force between the two realizes the preliminary fitting and fixing of the retaining cylinder 9 to the needle tip 3; in order to strengthen the fixing of the retaining cylinder 9 on the outer surface of the needle tip 3, the fixing structures pass through the mounting holes on the retaining cylinder 9 and push the rubber ring 12 to closely adhere to the outer surface of the needle tip 3, thereby realizing the fitting and fixing of the inner ring of the rubber ring 12 to the outer surface of the needle tip 3, making the position of the retaining cylinder 9 more stable, avoiding the movement of the retaining cylinder 9 due to the force during the impact of the needle tip 3, and thus realizing that the force on the front part of the needle tip 3 can be offset by the retaining cylinder 9, thereby prolonging the service life of the needle tip 3.

[0047] More specifically, in this embodiment, the fixing structure includes an extrusion block 11 disposed in the mounting hole. The extrusion block 11 can move up and down along the axis of the mounting hole, and the surface of the extrusion block 11 facing the needle 3 can abut against the outer ring of the rubber ring 12.

[0048] When the designed extrusion block 11 moves downward along the axis of the mounting hole in this embodiment, the extrusion block 11 will gradually approach the rubber ring 12 and abut against the rubber ring 12. Since the surface contact between the extrusion block 11 and the rubber ring 12 increases the friction between the two, at the same time, the extrusion force of the extrusion block 11 is transmitted to the outer surface of the needle 3 through the rubber ring 12, further fixing the retaining cylinder 9 on the outer surface of the needle 3.

[0049] In addition, the mounting hole includes a movable hole and a threaded hole communicating with the movable hole. The inner diameter of the movable hole is twice that of the threaded hole. The movable hole allows the extrusion block 11 to move up and down along its axis. A threaded rod 10 is threadedly connected in the threaded hole. The threaded rod 10 moves up and down along its axis and can abut against the extrusion block 11.

[0050] The designed mounting hole is formed by combining a movable hole and a threaded hole into an inverted T-shaped structure. At the same time, the extrusion block 11 is located in the movable hole and moves up and down along the axis of the movable hole. Therefore, when the extrusion block 11 is not subjected to a force, the extrusion block 11 will not exert an extrusion force on the rubber ring 12; when the threaded rod 10 moves downward along the axis of the threaded hole, the threaded rod 10 passes through the threaded hole and pushes the extrusion block 11 in the movable hole to move towards the rubber ring 12, thereby realizing the extrusion and fixation of the extrusion block 11 on the rubber ring 12.

[0051] In this embodiment, by adding an adapter cylinder 2 between the needle bar 1 and the needle 3, the adapter cylinder 2 is used to improve the strength of the punching needle and make it not easy to break; in addition, the movable chamber 5 provided in the needle bar 1, the connection hole provided in the adapter cylinder 2, and the through hole provided in the needle 3 make the punching needle achieve the characteristic of light weight. And a push rod 4 that reciprocates along the length direction of the needle bar 1 is provided in the movable chamber 5 of the needle bar 1. The push rod 4 utilizes the elastic potential energy of the return spring 7 to realize the characteristic of ejecting waste materials, preventing the needle 3 from carrying waste materials when punching automotive parts, resulting in incomplete discharge of the punching waste materials of the automotive parts and solving the problem of the needle 3 bringing back waste materials.

[0052] The above are only embodiments of the present utility model, and common general technical solutions and / or characteristics in the solution are not described in detail herein. It should be noted that for those skilled in the art, without departing from the technical solution of the present utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the present utility model, and these will not affect the implementation effect of the present utility model and the practicality of the patent. The protection scope required by this application shall be subject to the content of its claims, and the specific implementation manners and the like recorded in the specification can be used to interpret the content of the claims.

Claims

1. A durable punch pin, characterized in that, It includes an integrally connected needle rod and a needle head. An active chamber is provided inside the needle rod, and a through hole communicating with the active chamber is provided inside the needle head. A push rod that reciprocates along the length direction of the needle rod is slidably connected inside the active chamber, and the push rod can pass through the through hole and extend outwards.

2. A durable punch pin according to claim 1, characterized in that: A retaining cylinder is sleeved on the outer surface of the needle head. The retaining cylinder can reciprocate along the length direction of the needle head. Several fixing structures are evenly distributed along the circumferential direction of the retaining cylinder, and all the fixing structures can synchronously lock the retaining cylinder on the outer surface of the needle head.

3. A durable punch pin according to claim 1, characterized in that: There is also an adapter cylinder between the needle rod and the needle head. The two ends of the adapter cylinder are respectively detachably connected to the needle rod and the needle head. The longitudinal section of the adapter cylinder is in an isosceles trapezoid structure. The adapter cylinder has a connection hole connecting the active chamber and the through hole, and the longitudinal section of the connection hole is in an isosceles trapezoid structure. The inner diameter of the through hole is equal to the diameter of the push rod.

4. A durable punch pin according to claim 1, characterized in that: A return spring is provided inside the active chamber. One end of the return spring is fixed on the inner end wall of the active chamber, and the other end is fixed with a slider. The slider can reciprocate along the length direction of the needle rod, and the side of the slider away from the return spring is fixedly connected to the push rod.

5. The durable punch pin according to claim 2, wherein: A rubber ring is embedded on the inner ring of the retaining cylinder. The rubber ring is sleeved on the outer surface of the needle head. Several mounting holes are provided in the retaining cylinder along its circumferential direction and arranged in the radial direction. The mounting holes correspond to the fixing structures one by one. The fixing structures pass through the mounting holes and push the rubber ring to closely adhere to the outer surface of the needle head, so that the inner ring of the rubber ring fits and is fixed to the outer surface of the needle head.

6. The durable punch pin according to claim 5, wherein: The fixing structure includes a pressing block arranged in the mounting hole. The pressing block can move up and down along the axis of the mounting hole, and the surface of the pressing block facing the needle head can abut against the outer ring of the rubber ring.

7. A durable punch pin according to claim 6, characterized in that: The mounting hole includes an active hole and a threaded hole communicating with the active hole. The inner diameter of the active hole is twice the inner diameter of the threaded hole. The active hole allows the pressing block to move up and down along its axis. A threaded rod is threadedly connected in the threaded hole. The threaded rod moves up and down along its axis and can abut against the pressing block.

8. A durable punch pin according to claim 1, characterized in that: A needle cap is fixed to the end of the needle rod away from the needle head.

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