A rocker arm guide mechanism and a cold header

Abstract

The utility model belongs to the field of cold header, provide a swing arm guide mechanism and cold header, include: guide seat, be provided with a plurality of parallelly arranged guide hole, guide column and knock out swing arm, guide column is set up in the guide hole movably, and is connected with the material knocking off rod, and is formed with the guide surface in the guide column, the top of knock out swing arm is installed with the pin seat, the arc surface is formed on the pin seat symmetry, the pin seat moves to the guide column in, make the arc surface moves and is tightly in the guide surface, the arc surface can be because knock out swing arm's rotation and always tangent to the guide surface, to drive guide column together with material knocking off rod reciprocating movement along the guide hole axis direction. Compared with prior art, the utility model has the advantages that through the arc surface and the guide surface always keep tangent contact, cooperate the guide hole and guide and limit function of guide column, the stability and repeat positioning accuracy of material knocking off rod movement are improved significantly, ensure that the quality of material knocking off long size product satisfies the use requirement of user.

Description

Technical Field

[0001] This utility model belongs to the field of cold heading machines, specifically relating to a rocker arm guide mechanism and a cold heading machine. Background Technology

[0002] A cold heading machine is an automated special-purpose pressure processing equipment used to plastically deform metal wires or bars at room temperature. It uses high-speed, high-force impact and extrusion to make the metal material flow and take shape in the mold cavity, producing fasteners and irregular parts with various complex shapes.

[0003] In the existing cold heading machine structure, since the linear stroke of the ejector bar is converted from the swing angle of the ejector arm through the linkage mechanism, when dealing with longer products, the increase in ejector stroke directly leads to a significant increase in the swing angle required by the ejector arm, which will also produce obvious lateral separation, thereby destroying the accuracy and stability of the ejector bar when it moves back and forth in a straight line. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a rocker arm guide mechanism and cold heading machine that features a simple structure, good stability, and improved stability and repeatability of the feeding rod movement.

[0005] The objective of this utility model can be achieved by addressing the following technical problem: proposing a rocker arm guide mechanism, comprising: a guide seat, which is configured with a plurality of parallel guide holes;

[0006] The guide post and the ejector rocker arm are provided. The guide post is movably disposed in the guide hole and connected to the feeding rod, and a guide surface is formed in the guide post. A pin seat is installed at the top of the ejector rocker arm. A curved surface is symmetrically formed on the pin seat. The pin seat extends movably into the guide post, so that the curved surface is movably pressed against the guide surface.

[0007] The arc-shaped surface can always be tangent to the guide surface due to the rotation of the ejector rocker arm, so as to drive the guide post and the feeding rod to reciprocate along the axis of the guide hole.

[0008] In the aforementioned rocker arm guide mechanism, the two arc-shaped surfaces are connected by a plane.

[0009] In the aforementioned rocker arm guide mechanism, the bottom wall of the guide seat is further provided with an oblong hole, which communicates with the guide hole so that the pin seat can pass through and extend into the guide hole.

[0010] In the aforementioned rocker arm guiding mechanism, the pin seat is provided with a pin shaft and a locking block. The pin shaft is connected to the ejector rocker arm, and the locking block causes the pin seat to be tightly attached to the side wall of the ejector rocker arm.

[0011] In the aforementioned rocker arm guide mechanism, the guide post has a clearance hole along its radial direction, the waist-shaped hole communicates with the clearance hole, the guide surface is distributed on the inner walls of both sides of the clearance hole facing the axis of the guide post, and a drive part with the arc-shaped surface is formed on the pin seat, the drive part extends movably into the clearance hole.

[0012] In the aforementioned rocker arm guide mechanism, a pull rod seat is movably provided inside the guide seat, and a push rod connected to the guide column is provided inside the pull rod seat. The push rod is connected to the feeding rod.

[0013] In the aforementioned rocker arm guide mechanism, the outer wall of the guide seat is further provided with several reinforcing ribs.

[0014] In the aforementioned rocker arm guide mechanism, an extension plate is formed at the end of the guide seat, and a mounting hole is provided on the extension plate for fasteners to pass through, so as to limit the displacement of the guide seat.

[0015] In the aforementioned rocker arm guiding mechanism, the ejector rocker arm is further provided with an assembly hole, and a forward-pumping copper sleeve is provided in the assembly hole.

[0016] The technical solution adopted by this utility model to solve its technical problem is to also propose a cold heading machine, including one of the rocker arm guide mechanisms mentioned above.

[0017] Compared with the prior art, the present invention has the following beneficial effects:

[0018] (1) The rocker arm guide mechanism and cold heading machine of this utility model maintain tangential contact between the arc surface and the guide surface, and with the guide hole, guides and limits the guide column, which significantly improves the stability of the feeding rod movement and the repeatability of the positioning accuracy, and ensures that the quality of the feeding long-size products meets the user's requirements.

[0019] (2) The clearance hole is connected to the waist-shaped hole, which facilitates the installation and movement clearance of the drive unit. At the same time, the embedded structure effectively protects the contact area between the guide surface and the arc surface, reduces the intrusion of external dust, oil and other impurities, and improves the mechanism's anti-pollution ability and long-term operational reliability.

[0020] (3) By utilizing the excellent wear resistance and self-lubricating properties of the front punch copper bushing, the friction coefficient during the rotation of the ejector rocker arm is significantly reduced, thus reducing wear and heat generation and extending the service life of the moving parts. Attached Figure Description

[0021] Figure 1 This is an exploded view of the area between the ejector arm and the guide seat;

[0022] Figure 2This is a schematic diagram of the overall structure of the ejector rocker arm;

[0023] Figure 3 This is a structural diagram of the guide post and tie rod seat;

[0024] Figure 4 This is a schematic diagram of the guide seat.

[0025] In the diagram, 1 is the guide seat; 10 is the guide hole; 11 is the waist-shaped hole; 12 is the reinforcing rib; 13 is the extension plate; 130 is the mounting hole; 2 is the guide post; 20 is the guide surface; 21 is the clearance hole; 3 is the ejector rocker arm; 30 is the pin seat; 300 is the drive unit; 300a is the arc surface; 300b is the plane; 301 is the pin shaft; 302 is the locking block; 31 is the assembly hole; 310 is the front punch copper sleeve; 4 is the tie rod seat; 40 is the ejector rod. Detailed Implementation

[0026] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0027] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present invention are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indication will also change accordingly.

[0028] like Figure 1 As shown, this solution mainly describes a rocker arm guide mechanism used in a cold heading machine. However, this rocker arm guide mechanism is not limited to use in cold heading machines, but can also be applied to other equipment that requires a guide mechanism.

[0029] like Figures 1 to 4 As shown, a rocker arm guide mechanism includes a guide seat 1, a guide post 2, and an ejector rocker arm 3.

[0030] The guide seat 1 is provided with several parallel guide holes 10; the guide post 2 is movably disposed in the guide holes 10 and connected to the feeding rod, and a guide surface 20 is formed in the guide post 2; a pin seat 30 is installed at the top of the ejector rocker arm 3, and an arc surface 300a is symmetrically formed on the pin seat 30. The pin seat 30 extends movably into the guide post 2, so that the arc surface 300a is movably pressed against the guide surface 20; the arc surface 300a can always be tangent to the guide surface 20 due to the rotation of the ejector rocker arm 3, so as to drive the guide post 2 together with the feeding rod to reciprocate along the axial direction of the guide hole 10.

[0031] In this embodiment, the ejector rocker arm 3 is rotatably mounted in the cold heading machine, while the guide seat 1 is detachably mounted above the ejector rocker arm 3. By setting a guide surface 20 inside the guide post 2 and using a symmetrical arc-shaped surface 300a on the pin seat 30, the arc-shaped surface 300a and the guide surface 20 are always in tangential contact. That is, as the rocker arm continues to swing, the point of tangency moves forward along the guide surface 20, and the direction of the thrust applied to the guide surface 20 is always perpendicular to the normal direction of the contact point. Therefore, the continuous contact between the arc-shaped surface 300a and the guide surface 20 ensures the smoothness of the transmission process and the precision of the guidance. This significantly improves the response speed and repeatability of the ejection action. With the rotation of the ejection rocker arm 3, this tangential drive method efficiently and smoothly converts the rotational motion of the ejection rocker arm 3 into the linear reciprocating motion of the guide post 2 (which in turn drives the ejection rod). Combined with the guide hole 10's further guiding and limiting function for the guide post 2's movement, it avoids significant lateral separation during reciprocating movement, thus preventing damage to the accuracy of the ejection rod's linear reciprocating movement. This significantly improves the stability and repeatability of the ejection rod's movement, ensuring that the quality of longer-sized products meets the user's requirements.

[0032] like Figure 2 As shown, in this embodiment, the two arc surfaces 300a are connected by a plane 300b. The plane 300b can avoid the guide surface 20 when the pin seat 30 rotates to a certain limit position with the ejector arm, thus avoiding stress concentration or jamming during the reversing stage. This structure optimizes the transmission path, improves the transmission smoothness, and also facilitates the processing and manufacturing of the contact part between the pin seat 30 and the guide block, reducing production costs.

[0033] The pin seat 30 is provided with a pin 301 and a locking block 302. The pin 301 is connected to the ejector rocker arm 3, and the locking block 302 makes the pin seat 30 fit tightly against the side wall of the ejector rocker arm 3.

[0034] like Figure 2 As shown, this embodiment employs a fixing method combining the pin 301 and the locking block 302. This not only achieves a reliable hinge connection between the pin seat 30 and the ejector rocker arm 3, but also presses the pin seat 30 firmly against the side wall of the ejector rocker arm 3 via the locking block 302. This effectively prevents the pin seat 30 from loosening or falling off due to vibration when the ejector rocker arm 3 rotates frequently, thus improving the reliability and safety of the connection. Therefore, this structure enhances the overall connection rigidity, improving transmission accuracy and operational stability, and facilitating the disassembly and maintenance of the overall structure. It also ensures that the arc-shaped surface 300a on the pin seat 30 can be promptly disassembled and replaced when wear or damage occurs.

[0035] The bottom wall of the guide seat 1 also has a waist-shaped hole 11, which is connected to the guide hole 10 so that the pin seat 30 can pass through and extend into the guide hole 10.

[0036] like Figure 4 As shown, the design of the waist-shaped hole 11 in this embodiment allows the pin seat 30 to be easily inserted from the bottom of the guide seat 1 and extend into the guide hole 10 to cooperate with the guide post 2, which greatly simplifies the assembly process. The connection between the ejector rocker arm 3 and the guide post 2 can be completed without disassembling the entire guide seat 1. At the same time, the waist-shaped hole 11 provides the necessary space for the pin seat 30 to move, ensuring that it swings freely during the rotation of the ejector rocker arm 3 without structural interference, thus ensuring smooth transmission.

[0037] The guide post 2 has a clearance hole 21 in its radial direction. The waist-shaped hole 11 communicates with the clearance hole 21. The guide surface 20 is distributed on the inner walls of both sides of the clearance hole 21 facing the axis of the guide post 2. A drive part 300 with an arc-shaped surface 300a is formed on the pin seat 30. The drive part 300 extends movably into the clearance hole 21.

[0038] like Figure 1 , Figure 3 as well as Figure 4 As shown, in this embodiment, the guide surface 20 is disposed on the inner wall of both ends of the guide post 2 along the axial direction (see reference). Figure 3 The drive unit 300 on the pin seat 30 extends into it for contact transmission, achieving a compact internal drive structure design. Furthermore, the clearance hole 21 communicates with the oblong hole 11, facilitating the installation and movement clearance of the drive unit 300. Simultaneously, this embedded structure effectively protects the contact area between the guide surface 20 and the arc-shaped surface 300a, reducing the intrusion of external dust, oil, and other impurities, thus improving the mechanism's anti-contamination capability and long-term operational reliability. Therefore, this structure ensures effective contact and force transmission between the arc-shaped surface 300a and the guide surface 20, improving transmission efficiency and response speed.

[0039] The guide seat 1 is also equipped with a pull rod seat 4, and the pull rod seat 4 is equipped with a push rod 40 connected to the guide column 2. The push rod 40 is connected to the material feeding rod.

[0040] like Figure 3 As shown, this embodiment introduces a tie rod seat 4 and a top rod 40 structure to form a modular transmission chain, so that the linear motion of the guide column 2 is reliably transmitted to the ejector rod through the top rod 40. At the same time, the tie rod seat 4 is movably set in the guide seat 1, which further enhances the guiding accuracy, improves the transmission efficiency of the ejector force, and ensures that the quality of the ejector of longer-sized products meets the user's requirements.

[0041] Preferably, such as Figure 4 As shown, in this embodiment, a reinforcing rib 12 is provided on the outer wall of the guide seat 1, which significantly improves the overall structural rigidity and deformation resistance of the guide seat 1, effectively suppresses structural fatigue cracking caused by vibration, extends the service life of the guide seat 1, and ensures that the parallelism between multiple guide holes 10 is maintained for a long time, thereby maintaining the consistency and synchronization of the actions of each feeding unit.

[0042] An extension plate 13 is also formed at the end of the guide seat 1. The extension plate 13 has a mounting hole 130 for fasteners to pass through, so as to limit the displacement of the guide seat 1.

[0043] like Figure 4 As shown, in this embodiment, the extension plate 13 and its mounting holes 130 provide an independent and stable mounting reference for the guide seat 1, allowing the guide seat 1 to be directly fixed to the main structure of the cold heading machine using fasteners. This avoids positional displacement caused by vibration or impact during operation, improving the convenience and reliability of the mechanism installation. It also ensures that the axis of the guide hole 10 remains precisely aligned with the feeding direction, thereby guaranteeing the accuracy of the feeding action and the safety of the equipment operation. It should be noted that the fasteners in this embodiment can be replaced by screws, bolts, or other connecting components.

[0044] The ejector rocker arm 3 is also provided with an assembly hole 31, and a front punch copper sleeve 310 is provided in the assembly hole 31.

[0045] like Figure 2 As shown, in this embodiment, a forward-pumping copper sleeve 310 is provided in the assembly hole 31 of the ejector rocker arm 3. Utilizing the excellent wear resistance and self-lubricating properties of the copper sleeve, the friction coefficient between the pin 301 and the assembly hole 31 is significantly reduced, reducing wear and heat generation, and extending the service life of the moving parts. At the same time, the copper sleeve has good anti-galling performance and can maintain stable operation under high temperature and heavy load conditions, improving the durability and maintenance cycle of the entire rocker arm guide mechanism and reducing equipment downtime maintenance costs.

[0046] It should be noted that in this invention, the use of terms such as "first," "second," and "a" is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this invention, "a plurality of" means at least two, such as two, three, etc., unless otherwise explicitly specified. The terms "connection," "fixed," etc., should be interpreted broadly. For example, "fixed" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two elements or the interaction between two elements, unless otherwise explicitly specified. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0047] Furthermore, the technical solutions of the various embodiments of the present invention can be combined with each other, but only if they are feasible for those skilled in the art. If the combination of technical solutions is contradictory or cannot be implemented, it should be considered that such combination of technical solutions does not exist and is not within the scope of protection claimed by the present invention.

[0048] The specific embodiments described herein are merely illustrative of the spirit of the invention. Those skilled in the art to which this invention pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of the invention or exceeding the scope defined by the appended claims.

Claims

1. A rocker arm guiding mechanism, characterized in that, include: The guide seat is equipped with several parallel guide holes; The guide post and the ejector rocker arm are provided. The guide post is movably disposed in the guide hole and connected to the feeding rod, and a guide surface is formed in the guide post. A pin seat is installed at the top of the ejector rocker arm. A curved surface is symmetrically formed on the pin seat. The pin seat extends movably into the guide post, so that the curved surface is movably pressed against the guide surface. The arc-shaped surface can always be tangent to the guide surface due to the rotation of the ejector rocker arm, so as to drive the guide post and the feeding rod to reciprocate along the axis of the guide hole.

2. The rocker arm guide mechanism according to claim 1, characterized in that, The two arc-shaped surfaces are connected by a plane.

3. The rocker arm guide mechanism according to claim 1, characterized in that, The bottom wall of the guide seat is also formed with an oblong hole, which communicates with the guide hole so that the pin seat can pass through and extend into the guide hole.

4. The rocker arm guide mechanism according to claim 2, characterized in that, The pin seat is provided with a pin shaft and a locking block. The pin shaft is connected to the ejector rocker arm, and the locking block makes the pin seat tightly attached to the side wall of the ejector rocker arm.

5. The rocker arm guide mechanism according to claim 3, characterized in that, The guide post has a clearance hole along its radial direction, the waist-shaped hole communicates with the clearance hole, the guide surface is distributed on the inner walls of both sides of the clearance hole facing the axis of the guide post, and a driving part with the arc-shaped surface is formed on the pin seat, the driving part extends movably into the clearance hole.

6. The rocker arm guide mechanism according to claim 4, characterized in that, The guide seat is also movably provided with a pull rod seat, and the pull rod seat is provided with a top rod connected to the guide column. The top rod is connected to the feeding rod.

7. The rocker arm guide mechanism according to claim 1, characterized in that, The outer wall of the guide seat is also formed with several reinforcing ribs.

8. A rocker arm guide mechanism according to claim 6, characterized in that, The end of the guide seat is also formed with an extension plate, and the extension plate has a mounting hole for fasteners to pass through, so as to limit the displacement of the guide seat.

9. A rocker arm guide mechanism according to claim 1, characterized in that, The ejector rocker arm is also provided with an assembly hole, and a front punch copper sleeve is provided in the assembly hole.

10. A cold heading machine, characterized in that, Includes a rocker arm guide mechanism as described in any one of claims 1-9.

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