A rocker arm mechanism for easy ejection of the push rod and a cold heading machine

Abstract

This utility model belongs to the field of cold heading machines, and provides a rocker arm mechanism and a cold heading machine that facilitates the ejection of a push rod. The mechanism includes: a rocker arm; a push block connected to the rocker arm, the push block having an arc surface; and a pull rod mechanism rotatably mounted on the rocker arm, connected to one end of the push rod. When the rocker arm swings, the pull rod mechanism supports the push rod, ensuring that the push rod is tangent to the arc surface, so that the thrust applied by the push block to the push rod is always collinear with the axis of the push rod. Compared with the prior art, the advantage of this utility model is that the pull rod mechanism supports the push rod, ensuring that the push rod remains tangent to the arc surface of the push block. Simultaneously, under the action of the arc surface of the push block, the thrust applied by the push block is always collinear with the axis of the push rod, preventing damage or even breakage of the push rod due to thrust at an angle to its axis, extending the service life of the push rod, and improving work efficiency.

Description

Technical Field

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

[0002] With the development of technology, new energy vehicles are the main development direction of the future automotive industry. New energy vehicles are cars that use power batteries and drive motors to replace traditional power sources, which can effectively reduce exhaust emissions.

[0003] The manufacturing process of new energy vehicles requires various irregularly shaped parts (connectors, fasteners). In industrial production, molds are often used to process these parts, and then the molded parts are separated from the male mold. The traditional demolding method is to use a rocker arm to swing and drive the ejector block to push the ejector rod for demolding. During the process of the ejector block pushing the ejector rod, the ejector rod itself is relatively long, which makes the end of the ejector rod near the ejector block prone to sagging. Furthermore, because the ejector block swings with the rocker arm, it will inevitably apply a thrust in the tilt direction of the ejector rod, which will cause the thrust on the ejector rod to be set at an angle with its axis. This will eventually cause damage or even breakage of the ejector rod, resulting in poor overall stability. Moreover, the replacement of the ejector rod affects production efficiency and increases manufacturing costs. Utility Model Content

[0004] The purpose of this invention is to address the aforementioned problems in the existing technology by proposing a rocker arm mechanism and a cold heading machine that facilitates the ejection of products by pushing the push rod to move.

[0005] The objective of this utility model can be achieved through the following technical solution: a rocker arm mechanism that facilitates the ejection of the push rod is proposed, comprising:

[0006] rocker arm;

[0007] A top block, which is connected to the rocker arm, has an arc surface on it;

[0008] A pull rod mechanism is rotatably mounted on the rocker arm. The pull rod mechanism is connected to one end of the push rod. When the rocker arm swings, the pull rod mechanism supports the push rod, so that the push rod is tangent to the arc surface, so that the thrust applied by the top block to the push rod is always collinear with the axial direction of the push rod.

[0009] In the aforementioned rocker arm mechanism that facilitates the ejection of the push rod, the rocker arm includes pull rod seats on both sides thereon, and each pull rod seat has an arc-shaped groove at one end. The pull rod mechanism includes a rotating block, and a guide arc surface is formed on the rotating block. The rotating block is located in the arc-shaped groove and moves against the inner wall of the arc-shaped groove through the guide arc surface.

[0010] In the aforementioned rocker arm mechanism that facilitates the ejection of the push rod, the pull rod mechanism includes:

[0011] A pull rod, which passes through the rotating block and the pull rod seat;

[0012] An elastic element is sleeved on the pull rod, with one end of the elastic element connected to the end of the pull rod away from the top rod, and the other end connected to the moving block.

[0013] In the aforementioned rocker arm mechanism that facilitates the ejection of the push rod, the pull rod seat includes a U-shaped groove, which is connected to the arc-shaped groove, and the pull rod is movably disposed within the U-shaped groove.

[0014] In the aforementioned rocker arm mechanism that facilitates the ejection of the push rod, the end of the pull rod is provided with a pull rod pin and a locking plate, the end of the push rod is provided with a connecting hole, the pull rod pin passes through the connecting hole, and the locking plate restricts the movement of the pull rod relative to the push rod.

[0015] In the aforementioned rocker arm mechanism that facilitates the ejection of the push rod, the push block includes:

[0016] Impact head;

[0017] A movable rod, the end of which is connected to the impact head, and the movable rod is movably connected to the rocker arm, thereby adjusting the relative position between the impact head and the rocker arm;

[0018] A locking nut and a locking block are provided, the locking block being connected to the moving rod and abutting against the rocker arm, and the locking nut restricting the movement of the moving rod relative to the top rod.

[0019] In the aforementioned rocker arm mechanism that facilitates the ejection of the push rod, the impact head is provided with a positioning pin, and the moving rod is provided with a locking groove. The positioning pin is movably engaged in the locking groove to prevent the impact head from disengaging from the moving rod.

[0020] In the aforementioned rocker arm mechanism that facilitates the ejection of the push rod, the rocker arm includes:

[0021] Rocker arm body;

[0022] The pin seat, the pull rod seat, the moving rod and the locking nut are all set on the pin seat, and the bottom of the pin seat is provided with a pin shaft, which is connected to the rocker arm body;

[0023] When the pin seat is close to the rocker arm body, the locking member passes through the pin seat and connects to the rocker arm body, so that the pin seat and the rocker arm body are fixedly connected.

[0024] In the aforementioned rocker arm mechanism that facilitates the ejection of the push rod, the pin seat includes a support block, which is movably mounted on the pin seat and movably abuts against the bottom wall of the impact head.

[0025] The technical solution adopted by this utility model to solve its technical problem is to also propose a cold heading machine, including a rocker arm mechanism that facilitates the ejection of the push rod as described above.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] (1) A tie rod mechanism is provided on the rocker arm. The tie rod seats on both sides of the rocker arm are provided with arc grooves. In conjunction with the guide arc surface of the rotating block, the tie rod mechanism supports the top rod, ensuring that the top rod and the arc surface of the top block remain tangent. At the same time, under the action of the arc surface, the thrust applied by the top block is always collinear with the axis of the top rod, avoiding damage or even breakage of the top rod due to the thrust at an angle to its axis, thus extending the service life of the top rod and improving work efficiency.

[0028] (2) The tie rod pin and locking plate at the end of the tie rod are matched with the connecting hole of the top rod, which can effectively limit the relative movement of the tie rod and the top rod and ensure a stable connection.

[0029] (3) The positioning pin inside the impact head engages with the locking groove of the moving rod to prevent the impact head from falling off, thus enabling the rapid installation and disassembly of the impact head. Attached Figure Description

[0030] Figure 1 This is a schematic diagram of a rocker arm mechanism that facilitates the ejection of the push rod in this utility model;

[0031] Figure 2 This is a schematic diagram of the installation structure of the tie rod mechanism;

[0032] Figure 3 This is a schematic diagram of the installation structure of the top block.

[0033] In the diagram, 1 is the rocker arm; 10 is the rocker arm body; 11 is the pin seat; 110 is the support block; 111 is the pin shaft; 12 is the tie rod seat; 120 is the arc groove; 121 is the U-shaped groove; and 13 is the locking component.

[0034] 2. Top block; 20. Arc surface; 21. Impact head; 210. Positioning pin; 22. Moving rod; 220. Locking groove; 23. Locking nut; 24. Locking block;

[0035] 3. Pull rod mechanism; 30. Pull rod; 31. Pull rod pin; 32. Locking plate; 33. Rotating block; 330. Guide arc surface; 34. Elastic element. Detailed Implementation

[0036] 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.

[0037] 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.

[0038] like Figure 1 As shown, this solution mainly describes a rocker arm mechanism for easy ejection of push rods on a cold heading machine. However, this rocker arm mechanism for easy ejection of push rods is not limited to use in cold heading machines, but can also be applied to other push rod ejection equipment.

[0039] like Figures 1 to 3 As shown, a rocker arm 1 mechanism for facilitating the ejection of a push rod is used to push the push rod to move and eject the product. It is characterized by comprising: a rocker arm 1; a push block 2 connected to the rocker arm 1, the push block 2 having an arc surface 20; and a pull rod mechanism 3 rotatably mounted on the rocker arm 1, the pull rod mechanism 3 being connected to one end of the push rod. When the rocker arm 1 swings, the pull rod mechanism 3 supports the push rod, making the push rod tangent to the arc surface 20, so that the thrust applied by the push block 2 to the push rod is always collinear with the axial direction of the push rod.

[0040] like Figure 1 As shown, when the rocker arm 1 swings counterclockwise, the pull rod mechanism 3 can swing relative to the rocker arm 1, so that the pull rod mechanism 3 provides stable support for the push rod, always keeping the push rod tangent to the arc surface 20 of the top block 2. The top block 2 applies a thrust to the push rod through the arc surface 20. When the push rod is subjected to a thrust at the center position of the arc surface 20, the direction of the thrust applied by the top block 2 is on the same plane as the axis of the push rod (i.e., on the same straight line); when the push rod is subjected to a thrust at a position other than the center position of the arc surface 20, the direction of the thrust applied by the top block 2 is parallel to the axis of the push rod. This effectively solves the problem of the thrust applied by the top block 2 to the push rod in the tilt direction when the rocker arm swings with the traditional structure, preventing the push rod from being damaged or even broken, avoiding frequent replacement of the push rod and increasing manufacturing costs, extending the service life of the push rod, and improving the overall production efficiency.

[0041] The rocker arm 1 includes a pull rod seat 12 on both sides, and each pull rod seat 12 has an arc groove 120 at one end. The pull rod mechanism 3 includes a rotating block 33, and a guide arc surface 330 is formed on the rotating block 33. The rotating block 33 is located in the arc groove 120 and moves against the inner wall of the arc groove 120 through the guide arc surface 330.

[0042] When the rocker arm 1 swings, the rotating block 33 moves within the arc groove 120 along with the movement of the pull rod mechanism 3. At this time, the guide arc surface 330 slides along the inner wall of the arc groove 120, and the movement direction of the rotating block 33 is constrained by the trajectory of the arc groove 120, ensuring that the rotating block 33 rotates relative to the rocker arm 1 within the arc groove 120 as the rocker arm 1 swings, thereby stably supporting the top rod and maintaining the tangential relationship between the top rod and the arc surface 20 of the top block 2 without being disrupted.

[0043] The lever mechanism 3 includes: a lever 30, which passes through the rotating block 33 and the lever seat 12; and an elastic element 34, which is sleeved on the lever 30. One end of the elastic element 34 is connected to the end of the lever 30 away from the top rod, and the other end is connected to the rotating block 33.

[0044] When the rocker arm 1 swings, causing the position of the pull rod 30 to change relative to the pull rod seat 12, the elastic element 34 will undergo elastic deformation (tension or compression) with the displacement of the pull rod 30, providing buffer force through its own elasticity. At the same time, the preload of the elastic element 34 can ensure that the rotating block 33 always abuts against the inner wall of the arc groove 120, avoiding instability of support due to gaps, and maintaining the tangential state between the top rod and the top block 2.

[0045] The pull rod seat 12 includes a U-shaped groove 121, which is connected to an arc-shaped groove 120, and the pull rod 30 is movably disposed in the U-shaped groove 121.

[0046] like Figure 2 As shown, the U-shaped groove 121 provides a clear linear motion guide for the pull rod 30, and cooperates with the arc-shaped groove 120 to guide the arc-shaped motion of the rotating block 33. That is, when the rotating block 33 slides in the arc-shaped groove 120, the pull rod 30 moves along the U-shaped groove 121. Figure 2 The vertical movement prevents the lever 30 from deviating and ensures that the lever 30 moves only in the preset direction, further improving the accuracy of the lever's movement.

[0047] The end of the pull rod 30 is provided with a pull rod pin 31 and a locking piece 32, and the end of the top rod is provided with a connecting hole. The pull rod pin 31 passes through the connecting hole and the locking piece 32 restricts the movement of the pull rod 30 relative to the top rod.

[0048] The push rod is fitted onto the pull rod pin 31 through the connecting hole. When the rocker arm 1 swings, the pull rod 30 is displaced relative to the rocker arm 1, keeping the pull rod pin 31 supporting the push rod so that the push rod is tangent to the arc surface 20. The locking piece 32 constrains the relative position of the pull rod 30 and the push rod, preventing axial or radial relative displacement between the pull rod 30 and the push rod when the rocker arm 1 swings. This ensures that the support of the pull rod 30 for the push rod and the transmission of force are stable and reliable, and avoids the tangential relationship between the push rod and the arc surface 20 being destroyed due to the relative movement of the two.

[0049] The top block 2 includes: an impact head 21; a moving rod 22, the end of which is connected to the impact head 21 and is movably connected to the rocker arm 1, and the relative position between the impact head 21 and the rocker arm 1 is adjusted by the moving rod 22; a locking nut 23 and a locking block, the locking block being connected to the moving rod 22 and abutting against the rocker arm 1, and the moving rod 22 being restricted from moving relative to the top rod by the locking nut 23.

[0050] The worker pushes the moving rod 22 so that the impact head 21 can extend and retract on the rocker arm 1. After adjusting to the required position, a locking block 24 is fitted onto the other end of the moving rod 22 so that the locking block 24 abuts against the rocker arm 1. The locking nut 23 passes through the locking block 24 and is threadedly connected to the rocker arm 1 to restrict the movement of the moving rod 22 relative to the push rod. This allows the mechanism to adapt to the ejection requirements of different products, increasing versatility and reducing manufacturing costs.

[0051] The impact head 21 is provided with a positioning pin 210, and the moving rod 22 is provided with a locking groove 220. The positioning pin 210 is movably engaged in the locking groove 220 to prevent the impact head 21 from disengaging from the moving rod 22.

[0052] like Figure 3 As shown, the positioning pin 210 and locking groove 220 can be used to quickly install and remove the impact head 21, maintain the accuracy of the impact head 21, prevent excessive wear of the arc surface 20 from affecting its tangential relationship with the push rod, ensure the accuracy and quality during operation, and also provide convenience for the maintenance and replacement of the impact head.

[0053] The rocker arm 1 includes: a rocker arm body 10; a pin seat 11, a pull rod seat 12, a moving rod 22, and a locking nut 23, all of which are mounted on the pin seat 11. A pin shaft 111 is provided at the bottom of the pin seat 11, and the pin shaft 111 is connected to the rocker arm body 10; and a locking member 13, which passes through the pin seat 11 and connects to the rocker arm body 10 when the pin seat 11 is close to the rocker arm body 10, so that the pin seat 11 and the rocker arm body 10 are fixedly connected.

[0054] Specifically, the locking element 13 is a screw. When the pin seat 11 is close to the rocker arm body 10, the screw passes through the pin seat 11 and connects with the rocker arm body 10 to prevent the pin seat 11 from shifting relative to the rocker arm body 1, ensuring that the position of each component of the rocker arm 1 is stable during operation and improving the stability of the rocker arm 1.

[0055] The pin seat 11 includes a support block 110, which is movably mounted on the pin seat 11 and movably abuts against the bottom wall of the impact head 21.

[0056] When the impact head 21 pushes the push rod to eject the product, the impact head 21 will be subjected to the reaction force of the push rod. At this time, the support block 110 abuts against the impact head 21 from the bottom, providing upward support force for the impact head 21, reducing the shaking of the impact head 21. In addition, because the weight of the side with the impact head 21 is too large, the support block 110 is set below the impact head 21 to prevent it from shifting downward, ensuring the stability of the impact head 21 when pushing the push rod.

[0057] The working principle of the rocker arm mechanism and cold heading machine that facilitate the ejection of the push rod according to this utility model is as follows:

[0058] During operation, the rocker arm 1 swings, and the rotating block 33 moves against the arc groove 120 of the tie rod seat 12 on both sides of the rocker arm 1 through the guide arc surface 330. The tie rod 30 passes through the movable block and through the U-shaped groove 121. The tie rod 30 rotates relative to the rocker arm 1 and is connected to the top rod through the tie rod pin 31 set on it. The support top rod is always tangent to the arc surface 20, ensuring that the thrust applied by the top block 2 is always in the length direction of the top rod (i.e., the axial direction). This effectively solves the problem of the thrust applied to the top rod in the tilt direction when the top block 2 swings with the rocker arm in the traditional structure, preventing the top rod from being damaged or even broken. It avoids the frequent replacement of the top rod, which increases manufacturing costs, extends the service life of the top rod, and also improves the overall production efficiency.

[0059] It should be noted that the elastic element in this embodiment can be replaced by other elastic devices such as compression springs or return springs. Furthermore, the push rod in this embodiment moves reciprocally in the horizontal direction in the cold heading machine; its structure and working principle are the same as in the prior art, and will not be described in detail here.

[0060] 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.

[0061] 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.

[0062] 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 mechanism for facilitating the ejection of a push rod, used to move the push rod to eject a product; characterized in that, include: rocker arm; A top block, which is connected to the rocker arm, has an arc surface on it; A pull rod mechanism is rotatably mounted on the rocker arm. The pull rod mechanism is connected to one end of the push rod. When the rocker arm swings, the pull rod mechanism supports the push rod, so that the push rod is tangent to the arc surface, so that the thrust applied by the top block to the push rod is always collinear with the axial direction of the push rod.

2. The rocker arm mechanism for facilitating the ejection of the push rod according to claim 1, characterized in that, The rocker arm includes pull rod seats on both sides, and each pull rod seat has an arc-shaped groove at one end. The pull rod mechanism includes a rotating block with a guide arc surface formed on it. The rotating block is located in the arc-shaped groove and moves against the inner wall of the arc-shaped groove through the guide arc surface.

3. The rocker arm mechanism for facilitating the ejection of the push rod according to claim 2, characterized in that, The pull rod mechanism includes: A pull rod, which passes through the rotating block and the pull rod seat; An elastic element is sleeved on the pull rod, with one end of the elastic element connected to the end of the pull rod away from the top rod, and the other end connected to the rotating block.

4. The rocker arm mechanism for facilitating the ejection of the push rod according to claim 3, characterized in that, The pull rod seat includes a U-shaped groove, which is connected to the arc-shaped groove, and the pull rod is movably disposed within the U-shaped groove.

5. The rocker arm mechanism for facilitating the ejection of the push rod according to claim 4, characterized in that, The end of the pull rod is provided with a pull rod pin and a locking piece, and the end of the top rod is provided with a connecting hole. The pull rod pin passes through the connecting hole and the locking piece restricts the movement of the pull rod relative to the top rod.

6. The rocker arm mechanism for facilitating the ejection of the push rod according to claim 2, characterized in that, The top block includes: Impact head; A movable rod, the end of which is connected to the impact head, and the movable rod is movably connected to the rocker arm, thereby adjusting the relative position between the impact head and the rocker arm; A locking nut and a locking block are provided, the locking block being connected to the moving rod and abutting against the rocker arm, and the locking nut restricting the movement of the moving rod relative to the top rod.

7. The rocker arm mechanism for facilitating the ejection of the push rod according to claim 6, characterized in that, The impact head is provided with a positioning pin, and the moving rod is provided with a locking groove. The positioning pin is movably engaged in the locking groove to prevent the impact head from disengaging from the moving rod.

8. The rocker arm mechanism for facilitating the ejection of the push rod according to claim 6, characterized in that, The rocker arm includes: Rocker arm body; The pin seat, the pull rod seat, the moving rod and the locking nut are all set on the pin seat, and the bottom of the pin seat is provided with a pin shaft, which is connected to the rocker arm body; When the pin seat is close to the rocker arm body, the locking member passes through the pin seat and connects to the rocker arm body, so that the pin seat and the rocker arm body are fixedly connected.

9. A rocker arm mechanism for facilitating the ejection of the push rod according to claim 8, characterized in that, The pin seat includes a support block, which is movably mounted on the pin seat and movably abuts against the bottom wall of the impact head.

10. A cold heading machine, characterized in that, The rocker arm mechanism that facilitates the ejection of the push rod is described in any one of claims 1 to 9.

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