Split rifle direct-drive mechanism and die

Abstract

The utility model relates to the technical field of dies, in particular to a split type rifle rod direct drive mechanism and a die, which comprises a rifle rod, a rifle sleeve, a rifle rod axial bearing, a threaded core and a core axial bearing, the rifle rod is screwed into the rifle sleeve and is in transmission connection through a thread pair, the rifle rod axial bearing is arranged on the rifle rod, and the threaded core is arranged on the rifle rod axial bearing. The rifle rod and the threaded core are in torsion connection through a torsion connection feature, the core axial bearing is installed on the threaded core, when the torsion connection feature is a non-concentric torsion connection feature, a radial bearing needs to be arranged on each of the rifle rod and the threaded core, and the rifle rod and the threaded core are connected through the radial bearing. When the torsion connection characteristic is a concentric torsion connection characteristic, at least one radial bearing needs to be arranged at any position of the rifle rod or the threaded core; the split type rifle rod direct drive mechanism is used in the die.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, and relates to a split rifle rod direct drive mechanism and a mold. A mold is a variety of molds and tools used in industrial production to obtain the desired products by injection molding, blow molding, extrusion, die casting or forging molding, smelting, stamping and other methods. It is a tool that makes the blank become a part with a specific shape and size under the action of external force. It is widely used in blanking, die forging, cold heading, extrusion, powder metallurgy pressing, pressure casting, and compression molding or injection molding of engineering plastics, rubber, ceramics and other products. Background Art

[0002] The rifle rod mechanism used in the mold is a threaded motion pair mechanism composed of a rifle rod (long-lead multi-start screw) and a rifle sleeve (screw nut). The rifle rod mechanism converts the linear motion of the mold template into the rotational motion of the rifle rod, and then drives the thread core to rotate through the transmission mechanism. The rotational motion of the thread core causes the product's thread to unscrew from the thread core. Rifle rod direct drive is to use a set of rifle rod mechanisms to directly drive a thread core to rotate.

[0003] In the existing integral structure, the threaded rod and the threaded core are made into an integral whole, which is difficult to process and has high manufacturing cost. Moreover, if there is any partial damage, the entire structure needs to be scrapped, which causes great waste and increases maintenance cost. The existing structure is unreasonable and the transmission efficiency is very low. When the rectilinear motion of the mold template is converted into the rotational motion of the rifle rod by the rifle rod mechanism, the mold template generates a large axial thrust or pull on the rifle rod mechanism, and the spiral structure of the rifle rod mechanism generates a radial force. However, the existing rifle rod mechanism is directly installed on the mold template, and the rotating surface is in direct contact with the template surface, and is subject to great friction resistance on both the axial and radial contact surfaces. The transmission efficiency of the rifle rod mechanism is originally low, and the unreasonable existing structure leads to even lower transmission efficiency, and it is easy to wear and fail, and it is also particularly easy to get stuck and damage the mold and the rifle rod mechanism itself, which seriously limits the application and promotion of this mechanism and mold. Summary of the invention

[0004] In view of the defects existing in the above background technology, the utility model provides a split-type rifle rod direct-drive mechanism and mold, which reduces the processing difficulty, reduces the manufacturing and maintenance costs, improves the transmission efficiency, greatly reduces the risk of wear failure and jamming damage, and is more conducive to the application and promotion of this mechanism and mold.

[0005] To achieve the above technical objectives, the utility model adopts the following technical solution for a split-type rifle rod direct-drive mechanism, including: a rifle rod, a rifle sleeve, a rifle rod axial bearing, a threaded core, and a core axial bearing. The rifle rod is screwed into the rifle sleeve and connected through a threaded pair transmission, thereby converting the linear motion of the rifle sleeve into the rotational motion of the rifle rod. The rifle rod axial bearing is installed on the rifle rod, axially supports the rifle rod, and withstands the axial force of the rifle rod. The rifle rod and the threaded core are torsionally connected through a torsional connection feature, thereby making the threaded core and the rifle rod perform synchronous rotational motion. The core axial bearing is installed on the threaded core, axially supports the threaded core, and withstands the axial force of the threaded core. When the When the torsional connection feature is a non-concentric torsional connection feature, a rifle rod radial bearing is also required to be provided on the rifle rod to radially support the rifle rod and bear the radial force of the rifle rod. At the same time, a core radial bearing is provided on the threaded core to radially support the threaded core and bear the radial force of the threaded core. When the torsional connection feature is a concentric torsional connection feature, at least one radial bearing is required to be provided at any position of the rifle rod or the threaded core to radially support the rifle rod and the threaded core and bear the radial force of the rifle rod and the threaded core. If one radial bearing is provided on the rifle rod, it is called a rifle rod radial bearing. If one radial bearing is provided on the threaded core, it is called a core radial bearing.

[0006] The utility model mold adopts a split-type rifle rod direct-drive mechanism of the utility model. BRIEF DESCRIPTION OF THE DRAWINGS

[0007] Figure 1 It is a structural cross-sectional view of the first embodiment of a split-type rifle rod direct-drive mechanism of the utility model.

[0008] Figure 2 This is a first embodiment of a split rifle rod direct drive mechanism of the utility model and an appearance diagram of some parts in an exploded state.

[0009] Figure 3 It is a partial schematic diagram of the mold corresponding to the first embodiment of a split-type rifle rod direct-drive mechanism of the utility model.

[0010] Figure 4 It is a structural cross-sectional view of the second embodiment of a split-type rifle rod direct-drive mechanism of the utility model.

[0011] Figure 5 This is a second embodiment of a split rifle rod direct drive mechanism of the utility model and an appearance diagram of some parts in an exploded state.

[0012] Figure 6It is a partial schematic diagram of the mold corresponding to the second embodiment of a split-type rifle rod direct-drive mechanism of the utility model. DETAILED DESCRIPTION

[0013] In order to more clearly illustrate the technical solution of the present utility model, a non-limiting embodiment will be further described below in conjunction with the accompanying drawings.

[0014] It should be noted that some embodiments of the present invention described below are only used for illustration and are not intended to limit the scope of protection of the present invention. All other equivalent embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0015] It should be noted that all directional indications in the embodiments of the present invention (such as positive, reverse, forward, backward, end face, side face, etc.) are only used to explain the relative position relationship, movement status, etc. between the components in a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0016] The utility model is a first embodiment of a split-type rifle rod direct drive mechanism, referring to Figure 1 , 2, comprising: a rifle rod (1), a rifle sleeve (2), a rifle rod axial bearing (3), a rifle rod radial bearing (4), a threaded core (5), a core axial bearing (6), and a core radial bearing (7); the rifle rod (1) is screwed into the rifle sleeve (2) and connected by a threaded pair transmission, thereby converting the linear motion of the rifle sleeve (2) into the rotational motion of the rifle rod (1); the rifle rod axial bearing (3) is mounted on the rifle rod (1), axially supports the rifle rod (1), and bears the axial force of the rifle rod (1); the rifle rod radial bearing (4) is mounted on the rifle rod (1), radially supports the rifle rod (1), and bears the radial force of the rifle rod (1); the rifle rod (1) and the threaded core (5) are torsionally connected by setting a "straight" torsion connection feature. The torsional connection is realized by a rotational connection, so that the threaded core (5) and the rifle rod (1) perform synchronous rotational motion. The torsional connection feature comprises a "straight-shaped" protrusion (1-1) provided on the rifle rod (1) and a matching "straight-shaped" groove (5-1) provided on the threaded core (5), which are used to transmit torque after being matched and connected. The torsional connection feature cannot keep the rifle rod (1) and the threaded core (5) concentric in the radial direction, which is referred to as a non-concentric torsional connection feature in this article. The core axial bearing (6) is installed on the threaded core (5), axially supports the threaded core (5) and bears the axial force of the threaded core (5). The core radial bearing (7) is installed on the threaded core (5), radially supports the threaded core (5) and bears the radial force of the threaded core (5).

[0017] The utility model is a split-type rifle rod direct drive mechanism. The mold embodiment corresponding to the first embodiment is shown in FIG. Figure 3 The utility model discloses a split-type rifle rod direct drive mechanism, which is installed between a template 2 (B) and a template 3 (C) through the core radial bearing (7) and the rifle rod radial bearing (4), wherein the template 2 (B) and the template 3 (C) are fixed together by bolts, and the rifle sleeve (2) is fixedly installed on the template 1 (A), and the rifle sleeve (2) cannot rotate.

[0018] The utility model is a first embodiment of a split-type rifle rod direct drive mechanism and a corresponding mold embodiment. The working principle of the embodiment is described. The template 1 (A) performs a linear translation motion relative to the template 2 (B) and the template 3 (C), approaching or moving away, driving the rifle sleeve (2) to drive the rifle rod (1) to perform a rotational motion. The rifle rod (1) then drives the threaded core (5) to perform a rotational motion through the torsion connection feature, so that the thread of the product (not shown) is unscrewed from the threaded core (5). When the rifle sleeve (2) drives the rifle rod (1) to perform a rotational motion, a large axial force and radial force are generated. The rifle rod axial bearing (3), the rifle rod radial bearing (4), the core axial bearing (6), and the core radial bearing (7) play a very important contact support role, significantly reducing friction resistance, improving mechanical efficiency, and reducing the risk of wear failure and jamming damage.

[0019] The second embodiment of the split-type rifle rod direct drive mechanism of the utility model refers to Figure 4 , 5 , which is different from the first embodiment of the split-type rifle rod direct drive mechanism of the utility model in that: a concentric torsional connection feature is provided between the rifle rod (1) and the threaded core (5), and a rifle rod radial bearing (4) is not provided. The specific difference is that: a "hexagonal" torsional connection feature is provided between the rifle rod (1) and the threaded core (5), so that the threaded core (5) and the rifle rod (1) perform synchronous rotational motion, and the torsional connection feature includes a "hexagonal" protrusion (1-2) provided on the rifle rod (1) and a matching "hexagonal" hole (5-2) provided on the threaded core (5), which are used to transmit torque after being matched and connected, and also includes an outer cylindrical surface of the shaft (1-3) provided on the rifle rod (1) and a matching inner cylindrical surface of the hole (5-3) provided on the threaded core (5), which are used to make the rifle rod (1) and the threaded core (5) rotate synchronously after being matched and connected. The threaded core (5) remains concentric in the radial direction, that is, the torsion connection feature of the second embodiment can keep the rifle rod (1) and the threaded core (5) concentric in the radial direction, which is referred to as the concentric torsion connection feature in this article. With the concentric torsion connection feature, at least one radial bearing is provided, which is provided at any position of the rifle rod (1) or the threaded core (5), so as to support the rifle rod (1) and the threaded core (5) in the radial direction and withstand the radial force of the rifle rod (1) and the threaded core (5). If a radial bearing is provided on the rifle rod (1), it is called a rifle rod radial bearing (4, see Figure 1 , 2), if a radial bearing is provided on the threaded core (5), it is called a core radial bearing (7). Of course, with the concentric torsional connection feature, if it is not wasteful or other requirements are pursued, it is also possible to provide a radial bearing on the rifle rod (1) and the threaded core (5) respectively. The second embodiment preferably provides a core radial bearing (7) on the threaded core (5).

[0020] The mold embodiment corresponding to the second embodiment of the split-type rifle rod direct drive mechanism of the utility model is shown in FIG. Figure 6 The utility model discloses a split-type rifle rod direct drive mechanism, which is installed between a template 2 (B) and a template 4 (D) through the core radial bearing (7) and the rifle rod axial bearing (3), wherein the template 2 (B) and the template 4 (D) are fixed together by bolts, and the rifle sleeve (2) is fixedly installed on the template 1 (A), and the rifle sleeve (2) cannot rotate.

[0021] The operating principles of the second embodiment of the split-type rifle rod direct-drive mechanism and the corresponding mold embodiment of the utility model are the same as the operating principles of the first embodiment of the split-type rifle rod direct-drive mechanism and the corresponding mold embodiment of the utility model, and are not repeated here. The rifle rod axial bearing (3), the core axial bearing (6), and the core radial bearing (7) play a very important contact support role, significantly reducing friction resistance, improving mechanical efficiency, and reducing the risk of wear failure and jamming damage.

[0022] In the first and second embodiments of a split-type rifle rod direct-drive mechanism of the utility model, the torsional connection features, in addition to the "straight-shaped" and "hexagonal" ones, can also be other torsional connection features that can transmit torque, such as "D-shaped" connection, spline connection, pin connection, rivet connection, adhesive bonding, etc. In extreme cases, it can also be a connection that is difficult to disassemble, such as welding. The torsion connection feature can be divided into two types, namely, a fixed torsion connection feature and a non-fixed torsion connection feature, according to whether the rifle rod (1) and the threaded core (5) are fixed together. The fixed torsion connection feature needs to ensure radial concentricity, otherwise it cannot rotate normally, and belongs to a concentric torsion connection feature, such as a pin connection, a rivet connection, an adhesive bonding, a welding connection, etc. To determine whether a non-fixed torsion connection feature, such as a "straight" connection, a "hexagonal" connection, a "D-shaped" connection, a spline connection, etc., is a concentric torsion connection feature or a non-concentric torsion connection feature, it is necessary to see whether a hole or an axial matching surface for maintaining radial concentricity is set between the rifle rod (1) and the threaded core (5). If not, it is a non-concentric torsion connection feature. If so, it is a concentric torsion connection feature. When the torsional connection feature is a non-concentric torsional connection feature, a rifle rod radial bearing (4) is required to be provided on the rifle rod (1) to radially support the rifle rod (1) and bear the radial force of the rifle rod (1). At the same time, a core radial bearing (7) is required to be provided on the threaded core (5) to radially support the threaded core (5) and bear the radial force of the threaded core (5). When the torsional connection feature is a concentric torsional connection feature, at least one radial bearing is required to be provided at any position of the rifle rod (1) or the threaded core (5) to radially support the rifle rod (1) and the threaded core (5) and bear the radial force of the rifle rod (1) and the threaded core (5). If one radial bearing is provided on the rifle rod (1), it is called a rifle rod radial bearing (4). If one radial bearing is provided on the threaded core (5), it is called a core radial bearing (7).

[0023] The utility model provides a first and second embodiments of a split-type rifle rod direct drive mechanism, wherein the rifle rod axial bearing (3) and the core axial bearing (6) can be plane thrust bearings, angular contact ball bearings, tapered roller bearings, etc., which can withstand axial force and are wear-resistant, and can even be wear-resistant sheets, etc., with or without lubricants; the rifle rod radial bearing (4) and the core radial bearing (7) can be sliding bearings, deep groove ball bearings, angular contact ball bearings, tapered roller bearings, etc., which can withstand radial force and are wear-resistant, and can even be wear-resistant sleeves. etc., with or without lubricant; it is obvious that if the rifle rod radial bearing (4) is provided, the rifle rod axial bearing (3) and the rifle rod radial bearing (4) can be replaced by a bearing capable of bearing both axial force and radial force, such as angular contact ball bearings, tapered roller bearings, etc. Similarly, if the core radial bearing (7) is provided, the core axial bearing (6) and the core radial bearing (7) can be replaced by a bearing capable of bearing both axial force and radial force. In addition, the most preferred application is that the bearings, i.e., the rifle rod axial bearing (3), the core axial bearing (6), the rifle rod radial bearing (4) and (or) the core radial bearing (7), are all configured together when manufacturing a split rifle rod direct drive mechanism of the utility model, but the non-most preferred application is not excluded, i.e., the bearings are partially or completely configured only at the stage of manufacturing the mold of the utility model.

Claims

1. A split rifle rod direct drive mechanism, characterized in that: include: A rifle rod, a rifle sleeve, a rifle rod axial bearing, a threaded core, and a core axial bearing. The rifle rod is screwed into the rifle sleeve and connected via a threaded pair transmission, thereby converting the linear motion of the rifle sleeve into the rotational motion of the rifle rod. The rifle rod axial bearing is installed on the rifle rod, axially supports the rifle rod, and withstands the axial force of the rifle rod. The rifle rod and the threaded core are torsionally connected via a torsional connection feature, thereby allowing the threaded core to perform synchronous rotational motion with the rifle rod. The core axial bearing is installed on the threaded core, axially supports the threaded core, and withstands the axial force of the threaded core.

2. A split-type rifle rod direct drive mechanism according to claim 1, characterized in that When the torsional connection feature is a non-concentric torsional connection feature, a rifle rod radial bearing is also required to be provided on the rifle rod to radially support the rifle rod and withstand the radial force of the rifle rod. At the same time, a core radial bearing is provided on the threaded core to radially support the threaded core and withstand the radial force of the threaded core. When the torsional connection feature is a concentric torsional connection feature, at least one radial bearing is required to be provided at any position of the rifle rod or the threaded core to radially support the rifle rod and the threaded core and withstand the radial force of the rifle rod and the threaded core. If one radial bearing is provided on the rifle rod, it is called a rifle rod radial bearing. If one radial bearing is provided on the threaded core, it is called a core radial bearing.

3. A split-type rifle rod direct drive mechanism according to claim 1 or 2, characterized in that: If the rifle rod radial bearing is provided, the rifle rod axial bearing and the rifle rod radial bearing can be replaced by a bearing capable of bearing both axial force and radial force at the same time.

4. A split-type rifle rod direct drive mechanism according to claim 1 or 2, characterized in that: If the core radial bearing is provided, the core axial bearing and the core radial bearing can be replaced by a bearing that can bear both axial force and radial force.

5. A mold, characterized in that: It comprises a split-type rifle rod direct drive mechanism as described in any one of claims 1 to 4.

Images