Die reset rod with buffering function

Abstract

The utility model discloses a mould reset rod with buffering function belongs to mould technical field. Reset rod includes installation base, installation rod, top rod, buffer mechanism and locking mechanism, buffer mechanism sets up between installation base and installation rod, is used for absorbing impact. Locking mechanism sets up on the top end of installation rod, and it includes shell, and the sliding assembly and spring that accommodate in the shell, and sliding assembly includes slide rail and the ball that sets up on the slide rail. Through pressing shell can make sliding assembly move to compress spring, drive ball radial retreat to unlock top rod, after releasing shell, spring resets and promotes sliding assembly, makes ball radial clamping top rod under the action of slide rail to realize automatic locking. The utility model solves the problem of big reset rod impact, unstable operation and inconvenient dismounting and maintenance in the prior art, has the advantages of good buffering and damping effect, stable operation, quick dismounting, convenient maintenance.

Description

Technical Field

[0001] This utility model relates to the field of mold technology, and in particular to a mold reset rod with a buffer function. Background Technology

[0002] The mold return rod is a standard component widely used in injection molds and stamping dies. Its main function is to ensure that the ejection mechanism can accurately and reliably return to its initial position after the mold has opened and the workpiece has been ejected, preparing for the next mold closing, injection, or stamping. The performance of the return rod directly affects the production efficiency and service life of the mold.

[0003] In existing technologies, traditional mold reset rods typically employ an integral, rigid structure. Under the high-speed, high-frequency production cycles of modern manufacturing, the reset rod will experience a rigid collision with other components of the mold at the end of its reset action. This instantaneous impact not only generates significant noise and vibration but also causes cumulative damage to the mold's precision positioning references. Over the long term, this can easily lead to a decrease in mold accuracy and even affect the quality stability of the final product.

[0004] Furthermore, as a part that frequently comes into contact with the moving parts of the mold, the top part of the reset rod is prone to wear and requires regular inspection or replacement. However, existing reset rods are mostly installed using threaded connections or pin fixation. Their disassembly and installation not only require specialized tools, but also often operate in confined spaces. The entire maintenance process is time-consuming and labor-intensive, severely impacting the continuity and overall efficiency of the production line.

[0005] Therefore, existing mold reset rods generally suffer from functional defects due to insufficient structural design. They fail to provide a solution that balances the two key requirements of ensuring operational stability and improving maintenance convenience, which has become a technical bottleneck restricting mold production efficiency and service life.

[0006] Therefore, this utility model proposes a mold reset rod with a buffer function to overcome the shortcomings of the prior art. Utility Model Content

[0007] In view of the problems of large operating impact, poor stability, complex disassembly and assembly structure, and inconvenient maintenance caused by rigid connection in the existing mold reset rod, this utility model aims to provide a mold reset rod with buffer function with improved structure that can effectively solve the above problems.

[0008] This utility model provides a mold reset rod with a buffer function, including a mounting base, a mounting rod vertically fixedly connected to the upper end of the mounting base, a push rod that is detachably coaxially mounted with the mounting rod during installation, and a buffer mechanism disposed between the mounting base and the mounting rod; it also includes a locking mechanism for quickly locking and unlocking the push rod.

[0009] The locking mechanism has a sophisticated internal structure, which includes a housing coaxially fitted onto the upper end of the mounting rod, and a sliding component and a spring housed within the housing; the sliding component consists of a slide rail and balls that are rotatably mounted on the slide rail.

[0010] Furthermore, the spring, sliding assembly, housing, and push rod are combined in the following manner: the spring abuts against the housing and the sliding assembly, applying a preload to the sliding assembly. The preload drives the slide rail to move axially along the mounting rod, and pushes the ball to move radially inward through the guide structure of the slide rail, thereby locking the push rod into a locked state. When the housing is subjected to external pressure, the external force overcomes the preload of the spring, causing the sliding assembly to undergo a reverse axial displacement. This displacement provides space for the ball to retract radially outward, thereby releasing the lock on the push rod and unlocking the device.

[0011] Preferably, in order to enable the ball to reliably limit the axial movement of the push rod, the outer periphery of the push rod is provided with an annular groove that matches the ball. In the locked state, the ball can be partially embedded in the annular groove to form a firm engagement and lock.

[0012] Preferably, in order to efficiently convert the axial force applied by the spring into a radial locking force on the ball, the guide structure of the slide rail is a circumferentially distributed inclined guide groove. The axial elastic force of the spring is precisely through the inclined structure of these inclined guide grooves, which smoothly and powerfully pushes the ball to produce radial displacement.

[0013] Preferably, the spring is installed as a compression spring, with its axis coinciding with the axis of the mounting rod. Its two ends abut against the inner limiting step of the housing and the bearing end face of the sliding component, respectively. This coaxial, double-end supported arrangement ensures the stability and directional accuracy of the elastic force during transmission, avoiding off-center loading.

[0014] Preferably, to facilitate unlocking operations for users, the outer shell is a hollow cylindrical structure with operation windows or deformable areas made of elastic material on its side walls for users to apply pressure, providing a clear and effortless point of application for manual unlocking.

[0015] Preferably, the specific structure of the buffer mechanism is a urethane or high-elasticity polymer buffer ring fixed to the top of the mounting base and surrounding the bottom of the mounting rod. This material has excellent elasticity and damping characteristics, which can efficiently absorb the impact energy generated when the top rod is reset, thus protecting the equipment.

[0016] Preferably, in order to improve the alignment accuracy and smoothness of the installation process of the push rod, the upper end of the installation rod is formed with a central hole for initial guidance of the push rod, and the lower end of the push rod first forms a sliding fit with the central hole during installation, ensuring smooth docking with the locking mechanism later.

[0017] Preferably, the mounting base is a rectangular flat plate structure with mounting through holes at its four corners, which are used to securely mount the entire mold reset rod to the worktable or mold base of the external equipment by bolts, providing a reliable mounting foundation.

[0018] This utility model has the following beneficial effects: 1. This utility model, by setting a locking mechanism consisting of a housing, a sliding component, and a spring working in concert, allows the operator to simply press the housing to disengage or lock the internal ball bearings onto the push rod. This solves the problems of cumbersome disassembly and assembly, tool dependence, and low maintenance efficiency of the mold reset rod in the prior art, achieving the effects of quick disassembly and assembly, automatic locking, and convenient operation, greatly shortening maintenance time and improving work reliability.

[0019] 2. This utility model solves the problems of large impact, strong vibration and unstable equipment operation caused by the rigid connection of the reset rod in the prior art by adding a buffer mechanism between the mounting base and the mounting rod. It achieves the technical effect of effective buffering and shock absorption, significantly improves the stability of equipment operation and extends the service life of mold and related components.

[0020] 3. This utility model integrates the quick-locking mechanism and the buffer mechanism into a single design, organically combining the buffering function with the quick-assembly and disassembly function. This solves the problems of single function and scattered structure in existing technical solutions, achieving a compact structure and comprehensive functions. It also takes into account operational stability and ease of maintenance, and has high practical value. Attached Figure Description

[0021] Figure 1 This is a three-dimensional schematic diagram of a mold reset rod with buffer function proposed in this utility model; Figure 2 This is a schematic diagram of the slide rail with buffer function for a mold reset rod proposed in this utility model; Figure 3 for Figure 2 A cross-sectional view at point A in the middle.

[0022] Legend: 1. Mounting base; 2. Buffer mechanism; 3. Locking mechanism; 31. Top rod; 32. Mounting rod; 33. Sliding component; 331. Slide rail; 332. Ball bearing; 34. Spring; 35. Housing; Detailed Implementation Example

[0023] Please refer to Figures 1 to 3 This utility model provides a mold reset rod with a buffer function, which aims to solve the problems of poor equipment operation stability caused by rigid connection of the mold reset rod in the prior art, and insufficient maintenance convenience due to its complex disassembly and assembly structure.

[0024] like Figure 1 and Figure 2 As shown, the mold reset rod with buffer function includes a mounting base 1 and a mounting rod 32 vertically fixed to the upper end of the mounting base 1. The mounting base 1 is a rectangular flat plate structure with mounting through holes at its four corners for fixing the entire mold reset rod to external equipment with bolts. The mounting rod 32 serves as the main body, supporting the upper functional structure of the reset rod. A buffer mechanism 2 is provided between the mounting base 1 and the mounting rod 32. The buffer mechanism 2 is a urethane or high-elasticity polymer buffer ring fixed to the top of the mounting base 1 and surrounding the bottom of the mounting rod 32, used to absorb and attenuate the impact energy generated during the reset process. A push rod 31 is detachably coaxially mounted on the upper end of the mounting rod 32. The push rod 31 is the component that directly performs the reset action. To achieve quick installation and removal of the push rod 31, the mold reset rod also includes a locking mechanism 3. The locking mechanism 3 can quickly lock and unlock the push rod 31. The locking mechanism 3 includes a rod coaxially sleeved on the mounting base 1. The upper end of the rod 32 has a housing 35, and a sliding assembly 33 and a spring 34 are housed within the housing 35. The housing 35 is a hollow cylindrical structure. The sliding assembly 33 includes a slide rail 331 and a ball bearing 332 that is rotatably disposed on the slide rail 331. The spring 34 abuts against the housing 35 and the sliding assembly 33 and applies a continuous preload force to the sliding assembly 33. The preload force drives the slide rail 331 to move axially along the mounting rod 32, and pushes the ball bearing 332 to move radially inward through the guide structure of the slide rail 331 to hold the top rod 31, thereby forming a stable and reliable locking state. When it is necessary to disassemble or install the top rod 31, an external extrusion force is applied to the hollow cylindrical housing 35. The external force overcomes the preload force of the spring 34, causing the sliding assembly 33 to undergo a reverse axial displacement. This displacement provides the ball bearing 332 with a space to move radially outward, thereby causing the ball bearing 332 to disengage from the top rod 31, thus releasing the locking state and achieving quick operation.

[0025] Reference Figure 2 and Figure 3The outer shell 35 of the locking mechanism 3 is fixedly connected to the upper end of the mounting rod 32. The side wall of the outer shell 35 is provided with an operation window for the user to apply pressure or a deformable area made of elastic material to facilitate unlocking. The sliding component 33 and the spring 34 are both located in the internal cavity of the outer shell 35. The slide rail 331 of the sliding component 33 has inclined guide grooves evenly distributed along its inner wall. The balls 332 are respectively housed in these inclined guide grooves and can perform radial and axial compound movements along the inclined surface of the guide grooves. The spring 34 is a compression spring, and its axis coincides with the axis of the mounting rod 32. The two ends of the spring 34 abut against the internal limiting step of the outer shell 35 and the bearing end face of the sliding component 33, respectively. This arrangement ensures that the spring 34 always applies axial thrust to the slide rail 331.

[0026] Meanwhile, the outer periphery of the push rod 31 is provided with an annular groove that matches the ball 332. In the assembled state, the lower end of the push rod 31 first forms a sliding fit with the upper end of the mounting rod 32 to form a central hole for initial guidance of the push rod 31, so as to ensure the coaxiality of the assembly. Under the continuous force of the spring 34, the axial position of the slide rail 331 causes its inclined guide groove to forcefully push the ball 332 inward radially and finally embed it into the annular groove of the push rod 31. This embedded fit structure of the ball and the groove ensures that the push rod 31 is firmly axially limited in the locked state, thus having extremely high connection reliability.

[0027] To achieve a more reliable radial locking force conversion, the guide structure of the slide rail 331 is preferably a sloping guide groove evenly distributed along its inner wall circumferentially. The axial elastic force applied by the spring 34 is efficiently converted into a radial locking force on the ball 332 through the sloping surface of the guide groove. To ensure that the ball 332 can stably hold the push rod 31, an annular groove adapted to the ball 332 is provided on the outer periphery of the push rod 31. The ball 332 can be partially embedded in the annular groove in the locked state, thereby achieving a firm axial limit on the push rod 31.

[0028] Specifically, the spring 34 is installed as a compression spring, with its axis coinciding with the axis of the mounting rod 32. The two ends of the spring 34 abut against the inner limiting step of the housing 35 and the bearing end face of the sliding component 33, respectively. This arrangement ensures the stability and accurate transmission of the elastic force. To facilitate the user's unlocking operation, the side wall of the housing 35 is provided with an operation window for the user to apply squeezing force or a deformable area made of elastic material.

[0029] Furthermore, in order to improve the centering accuracy and smoothness of the top rod 31 during installation, the upper end of the mounting rod 32 is formed with a central hole for initial guidance of the top rod 31, and the lower end of the top rod 31 slides into the central hole during installation. As a specific implementation of the buffer mechanism 2, it is a buffer ring of urethane or high elastic polymer fixed to the top of the mounting base 1 and surrounding the bottom of the mounting rod 32. The mounting base 1 itself is a rectangular flat plate structure, and mounting through holes are opened at its four corners for fixing it firmly to external equipment such as machine tools with bolts.

[0030] The working principle is as follows: When installing or removing the top rod 31, the user applies a squeezing force to the housing 35. The force is transmitted through the housing 35 and overcomes the preload of the spring 34, causing the spring 34 to be compressed. After the spring 34 is compressed, its axial thrust on the sliding assembly 33 is reduced or eliminated, causing the sliding assembly 33 to move in the opposite direction along the axis of the mounting rod 32 under the action of external force. The movement of the slide rail 331 provides space for the ball bearings 332 in the inclined guide groove inside to move radially outward. The ball bearings 332 exit from the annular groove of the top rod 31. At this time, the locking of the top rod 31 is released, and the top rod 31 can be smoothly inserted or pulled out from the central hole of the mounting rod 32.

[0031] After installation or during normal operation, when the user releases the pressure applied to the housing 35, the spring 34, freed from external force, instantly rebounds and resets. Its elasticity pushes the sliding component 33 back to the locked position. During the reset process, the inclined structure of the inclined guide groove of the slide rail 331 forcibly pushes the ball 332 radially inward until the ball 332 is re-embedded and held in the annular groove of the push rod 31, thereby completing the automatic locking and fixing of the push rod 31 and ensuring the stability of the connection. During the operation of the mold reset rod, when the push rod 31 is subjected to axial impact, the impact force will be transmitted along the mounting rod 32 to the bottom buffer mechanism 2. The urethane or high-elasticity polymer buffer ring absorbs most of the impact energy through its own elastic deformation, thereby playing a role in buffering and shock absorption, protecting the equipment and improving the smoothness of operation.

Claims

1. A mold reset rod with a buffer function, comprising a mounting base (1) and a mounting rod (32) vertically fixedly connected to the upper end of the mounting base (1), wherein a top rod (31) is detachably coaxially mounted on the upper end of the mounting rod (32), and the mold reset rod further comprises a buffer mechanism (2) disposed between the mounting base (1) and the mounting rod (32); characterized in that, It also includes a locking mechanism (3), which is used to quickly lock and unlock the top rod (31). The locking mechanism (3) includes a housing (35) coaxially sleeved on the upper end of the mounting rod (32), and a sliding assembly (33) and a spring (34) housed in the housing (35). The sliding assembly (33) includes a slide rail (331) and a ball bearing (332) rotatably disposed on the slide rail (331). The spring (34) abuts against the housing (35) and the sliding assembly (33) and engages the top rod (31). The sliding assembly (33) applies a preload force, which drives the slide rail (331) to move axially along the mounting rod (32) and pushes the ball (332) to move radially inward through the guide structure of the slide rail (331) to lock the top rod (31) into a locked state. When the housing (35) is subjected to external pressure, the external force overcomes the preload force of the spring (34), causing the sliding assembly (33) to undergo a reverse axial displacement, thereby providing space for the ball (332) to retract radially outward, and thus releasing the locking of the top rod (31).

2. The mold reset rod with buffer function according to claim 1, characterized in that, The outer periphery of the push rod (31) is provided with an annular groove that is adapted to the ball (332). The ball (332) is partially embedded in the annular groove in the locked state to achieve axial positioning of the push rod (31).

3. The mold reset rod with buffer function according to claim 1, characterized in that, The guide structure of the slide rail (331) is a sloping guide groove evenly distributed along its inner wall circumferentially. The axial elastic force applied by the spring (34) is converted into a radial locking force on the ball (332) via the sloping surface of the sloping guide groove.

4. The mold reset rod with buffer function according to claim 1, characterized in that, The spring (34) is a compression spring (34), whose axis coincides with the axis of the mounting rod (32). The two ends of the spring (34) abut against the inner limiting step of the outer shell (35) and the bearing end face of the sliding component (33), respectively.

5. The mold reset rod with buffer function according to claim 1, characterized in that, The outer shell (35) is a hollow cylindrical structure, with an operation window or a deformable area made of elastic material on its side wall for the user to apply pressure, so as to unlock the locking mechanism (3).

6. The mold reset rod with buffer function according to claim 1, characterized in that, The buffer mechanism (2) is a urethane or high-elasticity polymer buffer ring fixed to the top of the mounting base (1) and surrounding the bottom of the mounting rod (32), used to absorb the impact energy generated when the top rod (31) is reset.

7. The mold reset rod with buffer function according to claim 1, characterized in that, The upper end of the mounting rod (32) has a central hole for initial guidance of the top rod (31), and the lower end of the top rod (31) slides in conjunction with the central hole during installation to ensure coaxiality of the assembly.

8. The mold reset rod with buffer function according to claim 1, characterized in that, The mounting base (1) is a rectangular flat plate structure with mounting through holes at its four corners, which are used to fix the mold reset rod to the external equipment by bolts.

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