Double-extrusion-pin mechanism of aluminum alloy die-casting die

Abstract

The utility model provides a double-extrusion-pin mechanism of an aluminum alloy die-casting die, and relates to the technical field of die-casting dies, the double-extrusion-pin mechanism comprises a base and a vertical supporting frame, and the vertical supporting frame is welded in the middle of the upper portion of the base; a vertically-arranged first semicircular die sleeve is welded to the center of the interior of the vertical supporting frame. One vertical side rod of the vertical supporting frame is provided with a second semicircular die sleeve sliding transversely, and the middle section of the vertical side rod is rotationally provided with a threaded sleeve in a penetrating mode; the second semicircular die sleeve is vertically supported, and a threaded propelling shaft is welded to the outer side of the middle part of the second semicircular die sleeve; and when the second semicircular die sleeve faces the first semicircular die sleeve, the second semicircular die sleeve abuts against the first semicircular die sleeve and is in butt joint with the first semicircular die sleeve to form a complete circular die sleeve. And the arc-shaped bevel rack slides towards the outer side to be separated from the second bevel gear and the transverse threaded shaft and is subjected to power decoupling, so that the arc-shaped bevel rack can be prevented from being driven by the two extrusion pins to be statically limited, and the normal and effective implementation of the one-time driving function of the arc-shaped bevel rack can be ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of die-casting dies, in particular to a double extrusion pin mechanism of an aluminum alloy die-casting die. Background Art

[0002] The middle shaft sleeve on the main structure of the mountain bike aluminum alloy pedal needs to be mass-produced and manufactured efficiently through an aluminum alloy die-casting mold in the form of a double extrusion pin.

[0003] The existing double extrusion pin mechanism is equipped with a telescopic drive mechanism for telescopically driving the two extrusion pins and an opening and closing drive mechanism for driving the die sleeve for use with the extrusion pin sleeve to open and close. However, there is often a lack of a synchronous drive mechanism between the two drive mechanisms that can transmit driving force to implement synchronous drive. As a result, before and after die-casting, the telescopic drive mechanism and the opening and closing drive mechanism need to be driven step by step in sequence to respectively perform telescopic operations and opening operations on the two extrusion pins and the die sleeve. The operation is relatively cumbersome and inconvenient, which indirectly reduces the overall production efficiency of the mechanism. Utility Model Content

[0004] In view of this, the utility model provides a double extrusion pin mechanism for an aluminum alloy die-casting mold to solve the problem that the telescopic drive mechanism and the opening and closing drive mechanism need to be driven step by step in sequence to perform telescopic operations and opening and closing operations on the two extrusion pins and the mold sleeve respectively, which is cumbersome and inconvenient to operate.

[0005] The technical solution proposed by the utility model is: a double extrusion pin mechanism of an aluminum alloy die-casting mold, specifically comprising: a base and an upright support frame, wherein the upright support frame is welded to the middle position above the base;

[0006] A first semicircular die sleeve is welded to the inner center of the vertical support frame; a second semicircular die sleeve is installed on a vertical side rod of the vertical support frame for sliding laterally, and a threaded sleeve is rotatably installed through the middle section of the vertical side rod; the second semicircular die sleeve is vertically supported and a threaded propulsion shaft is welded on the outer side of the middle part, a first bevel gear is welded on the outer end of the threaded sleeve, and the threaded propulsion shaft and the threaded sleeve are screwed together; when the second semicircular die sleeve faces the first semicircular die sleeve, it abuts against and contacts the first semicircular die sleeve and docks to form a complete circular die sleeve;

[0007] Two extrusion pins are symmetrically and slidably installed in the middle sections of the two horizontal support side bars of the vertical support frame. When in use, the two extrusion pins are slidably docked together and inserted into the circular mold sleeve together;

[0008] A transverse threaded shaft is rotatably mounted on the outer side of the middle part of the first semicircular die sleeve, a second bevel gear is mounted on the head end of the transverse threaded shaft, and a threaded ring is screwed onto the transverse threaded shaft; two sets of connecting rods are symmetrically rotatably connected between the threaded ring and the two extrusion pins; a driving ring is rotatably mounted on the outer side of the middle part of the vertical support frame, and an arc-shaped bevel rack is slidably mounted on the top end of the driving ring, which rotates with the driving ring and engages with the two bevel gears in turn.

[0009] Further,

[0010] An annular sealing plate is welded on one end of the extrusion pin away from the second semicircular die sleeve. When the extrusion pin is plugged and assembled with the circular die sleeve, the annular sealing plate abuts against an opening at one end of the circular die sleeve for sealing.

[0011] An L-shaped hexagonal vertical support shaft is welded to one end of the annular sealing plate away from the extrusion pin, and the hexagonal vertical support shaft is slidably fitted through the horizontal support side rods of the vertical support frame;

[0012] The tail ends of the two groups of connecting rods are respectively rotatably connected to the tail ends of the two hexagonal vertical support shafts.

[0013] Further,

[0014] The top part of the second semicircular mold sleeve is welded with an L-shaped sliding rod for horizontal support. The L-shaped sliding rod slides through and fits with the vertical side rods at corresponding positions on the vertical support frame, and the tail end is welded and fixed to the head end of the threaded propulsion shaft.

[0015] Further,

[0016] A transverse support injection pipe is welded to the top portion of the first semicircular die sleeve, and the transverse support injection pipe is penetrated and fixed to the vertical side rod pipe at the corresponding position on the vertical support frame by welding.

[0017] Further,

[0018] A horizontal positioning ring is welded and sleeved on the outer side of the middle part of the vertical support frame, and the driving ring is rotatably matched with the horizontal positioning ring.

[0019] Further,

[0020] Two positioning sleeves are symmetrically welded in the peripheral space of the driving ring, and a horizontally arranged U-shaped driving frame is welded on the outer side of the arc-shaped tapered rack. The U-shaped driving frame penetrates and slides with the two positioning sleeves.

[0021] The double extrusion pin mechanism of an aluminum alloy die-casting mold provided by the utility model has the following beneficial effects:

[0022] 1. Through two bevel gears, the driving ring and the arc-shaped bevel rack can rotate forward and backward and engage in sequence to drive the transverse threaded shaft and the threaded propulsion shaft to rotate forward and backward, drive and control the two extrusion pins and the second semicircular die sleeve to slide toward each other and slide back and forth laterally in sequence, and complete the telescopic cooperation of the two extrusion pins and the circular die sleeve and the opening and closing of the circular die sleeve at one time. Compared with the existing technology that lacks a synchronous driving mechanism similar to the driving ring between the transverse threaded shaft and the threaded propulsion shaft, it can save the trouble of driving the transverse threaded shaft and the threaded propulsion shaft in steps before and after die-casting to respectively perform the telescopic cooperation of the two extrusion pins and the circular die sleeve and the opening and closing of the circular die sleeve. The operation is more convenient and time-saving, which helps to indirectly improve the overall production and use efficiency of the double extrusion pin mechanism.

[0023] Second, the arcuate bevel rack slides outward to separate from the second bevel gear and the transverse threaded shaft and is dynamically decoupled, which can prevent the arcuate bevel rack from being statically limited by the two extrusion pins and unable to continuously rotate past the second bevel gear, and continue to implement meshing drive on the threaded propulsion shaft in the subsequent process, which helps to ensure the normal and effective implementation of the one-time drive function of the arcuate bevel rack. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings of the embodiments will be briefly introduced below.

[0025] The drawings described below only relate to some embodiments of the present invention, but are not intended to limit the present invention.

[0026] In the attached figure:

[0027] Figure 1 Shows a schematic diagram of the overall structure of the utility model;

[0028] Figure 2 It shows a schematic diagram of the sliding installation position of the second semicircular mold sleeve of the utility model;

[0029] Figure 3 A schematic diagram showing the disassembly state of the extrusion pin of the present invention is shown;

[0030] Figure 4 It shows a schematic diagram of the second semicircular mold sleeve of the utility model in a disassembled state;

[0031] Figure 5 A schematic diagram of the disassembled driving ring of the present invention is shown.

[0032] List of reference numerals:

[0033] 1. Base;

[0034] 2. Vertical support frame; 201. Threaded sleeve; 2011. First bevel gear; 202. Horizontal positioning ring;

[0035] 3. First semicircular die sleeve; 301. Horizontal threaded shaft; 3011. Second bevel gear; 302. Threaded ring; 303. Horizontal support injection pipe; 304. Connecting rod;

[0036] 4. Second semicircular die sleeve; 401. L-shaped slide rod; 402. Threaded propulsion shaft;

[0037] 5. Extrusion pin; 501. Annular sealing plate; 502. Hexagonal vertical support shaft;

[0038] 6. Driving ring; 601. Positioning sleeve; 602. Arc-shaped tapered rack; 6021. U-shaped driving frame. DETAILED DESCRIPTION

[0039] To make the purpose, technical solutions, and advantages of the present invention more clear, the technical solutions of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the described embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0040] Please refer to Figures 1 to 5 ;

[0041] Example 1:

[0042] The utility model proposes a double extrusion pin mechanism for an aluminum alloy die-casting mold, comprising: a base 1 and an upright support frame 2, wherein the upright support frame 2 is welded to the middle position above the base 1;

[0043] A first semicircular die sleeve 3 is welded to the inner center of the vertical support frame 2; a second semicircular die sleeve 4 is installed on a vertical side rod of the vertical support frame 2 for transverse sliding, and a threaded sleeve 201 is rotatably installed through the middle section of the vertical side rod; the second semicircular die sleeve 4 is vertically supported and a threaded propulsion shaft 402 is welded to the outer side of the middle part, and a first bevel gear 2011 is welded to the outer end of the threaded sleeve 201, and the threaded propulsion shaft 402 is threadedly engaged with the threaded sleeve 201; when the second semicircular die sleeve 4 faces the first semicircular die sleeve 3, it abuts against and contacts the first semicircular die sleeve 3 and docks to form a complete circular die sleeve;

[0044] The threaded sleeve 201 is rotated forward and backward to drive the threaded propulsion shaft 402 and the second semicircular die sleeve 4 to slide back and forth laterally, thereby controlling the second semicircular die sleeve 4 to be docked, assembled, disassembled, or separated from the first semicircular die sleeve 3, thereby opening and closing the circular die sleeve.

[0045] Two extrusion pins 5 are symmetrically and slidably installed in the middle section of the two horizontal bracing side bars of the vertical support frame 2. When in use, the two extrusion pins 5 are slidably docked together and inserted into the circular mold sleeve together;

[0046] A transverse threaded shaft 301 is rotatably mounted on the outer side of the middle portion of the first semicircular die sleeve 3, a second bevel gear 3011 is sleeved on the head end of the transverse threaded shaft 301, and a threaded ring 302 is screwed onto the transverse threaded shaft 301; two sets of connecting rods 304 are symmetrically rotatably connected between the threaded ring 302 and the two extrusion pins 5; a driving ring 6 is rotatably mounted on the outer side of the middle portion of the vertical support frame 2, and an arcuate bevel rack 602 is slidably mounted on the top end of the driving ring 6. As the driving ring 6 rotates, the arcuate bevel rack 602 engages with the two bevel gears in sequence;

[0047] The two sets of connecting rods 304, the threaded ring 302 and the two extrusion pins 5 are connected together to form two crank slider mechanisms. Through these two crank slider mechanisms, the horizontal reciprocating sliding of the threaded ring 302 can drive the two extrusion pins 5 to slide up and down toward each other, and cooperate with the circular mold sleeve in telescopic manner; the positive and negative rotation of the horizontal threaded shaft 301 can drive the threaded ring 302 to slide horizontally back and forth;

[0048] Through the two bevel gears, the driving ring 6 and the arcuate bevel rack 602 can rotate forward and reverse and engage in sequence to drive the horizontal threaded shaft 301 and the threaded propulsion shaft 402 to rotate forward and reverse, drive and control the two extrusion pins 5 and the second semicircular die sleeve 4 to slide toward each other and slide back and forth laterally in sequence, and complete the telescopic cooperation of the two extrusion pins 5 and the circular die sleeve and the opening and closing of the circular die sleeve at one time. Compared with the existing technology that does lack a synchronous driving mechanism similar to the driving ring 6 between the horizontal threaded shaft 301 and the threaded propulsion shaft 402, it can save the trouble of driving the horizontal threaded shaft 301 and the threaded propulsion shaft 402 in steps before and after die casting to respectively perform the telescopic cooperation of the two extrusion pins 5 and the circular die sleeve and the opening and closing of the circular die sleeve. The operation is more convenient and time-saving, which helps to indirectly improve the overall production and use efficiency of the double extrusion pin mechanism;

[0049] It is worth noting that: in the initial state, the arc-shaped tapered rack 602 is located at ( Figure 1 ), in the process of driving the transverse threaded shaft 301 and the threaded propulsion shaft 402 in sequence at one time, it first engages with the second bevel gear 3011; when it engages with the second bevel gear 3011 and drives the two extrusion pins 5 to slide close to each other, abutting and blocking the upper and lower openings of the first semicircular die sleeve 3, causing the two extrusion pins 5 and the transverse threaded shaft 301 to be abutted and limited, it needs to slide outward to separate from the second bevel gear 3011 and the transverse threaded shaft 301 and be dynamically decoupled;

[0050] In the above situation, the arcuate bevel rack 602 slides outward and separates from the second bevel gear 3011 and the transverse threaded shaft 301 and is dynamically decoupled, which can prevent the arcuate bevel rack 602 from being statically limited by the two extrusion pins 5 and unable to continuously rotate through the second bevel gear 3011. In the subsequent process, it continues to implement meshing drive on the threaded propulsion shaft 402, which helps to ensure the normal and effective implementation of the one-time driving function of the arcuate bevel rack 602.

[0051] Preferably,

[0052] An annular sealing plate 501 is welded to the end of the extrusion pin 5 away from the second semicircular die sleeve 4. When the extrusion pin 5 is plugged and assembled with the circular die sleeve, the annular sealing plate 501 abuts against an opening of the circular die sleeve for sealing.

[0053] An L-shaped hexagonal vertical support shaft 502 is welded to one end of the annular sealing plate 501 away from the extrusion pin 5. The hexagonal vertical support shaft 502 is slidably fitted through the horizontal support side rods of the vertical support frame 2.

[0054] The tail ends of the two sets of connecting rods 304 are rotatably connected to the tail ends of the two hexagonal vertical support shafts 502 respectively.

[0055] Based on the first embodiment, the second embodiment:

[0056] The top part of the second semicircular die sleeve 4 is welded with an L-shaped sliding rod 401 for horizontal support, and the L-shaped sliding rod 401 is slidably matched with the vertical side rod at the corresponding position on the vertical support frame 2, and the tail end is welded and fixed to the head end of the threaded propulsion shaft 402; the top part of the first semicircular die sleeve 3 is welded with a horizontal support injection tube 303, and the horizontal support injection tube 303 is welded and fixed to the vertical side rod tube at the corresponding position on the vertical support frame 2.

[0057] Preferably,

[0058] A horizontal positioning ring 202 is welded and sleeved on the outer side of the middle part of the vertical support frame 2, and the driving ring 6 is rotatably matched with the horizontal positioning ring 202.

[0059] Preferably,

[0060] Two positioning sleeves 601 are symmetrically welded in the outer space of the driving ring 6. A horizontally arranged U-shaped driving frame 6021 is welded to the outer side of the arc-shaped tapered rack 602. The U-shaped driving frame 6021 slides through the two positioning sleeves 601.

[0061] The arc-shaped bevel rack 602 and the drive ring 6 can be driven to rotate forward and backward through the U-shaped drive frame 6021;

[0062] It is worth noting that: when the arc-shaped bevel rack 602 engages with the two bevel gears in turn and implements forward and reverse rotation driving on the transverse threaded shaft 301 and the threaded propulsion shaft 402, the staff needs to manually push the arc-shaped bevel rack 602 through the U-shaped drive frame 6021 to keep it in a state of clamping engagement with the first bevel gear 2011 or the second bevel gear 3011 to ensure that the arc-shaped bevel rack 602 and the first bevel gear 2011 or the second bevel gear 3011 maintain continuous and effective transmission.

[0063] The working principle of this embodiment: the cross-bracing injection tube 303 is connected to the external high-temperature metal liquid extrusion feeding system. When in use, first slide the second semicircular die sleeve 4 against the first semicircular die sleeve 3, so that the second semicircular die sleeve 4 and the first semicircular die sleeve 3 form a complete circular die sleeve, and then drive and control the two extrusion pins 5 to slide close to each other and dock them in the circular die sleeve. When the two extrusion pins 5 are inserted into the circular die sleeve, the two annular sealing plates 501 are pressed against and blocked at the upper and lower ends of the circular die sleeve, and a closed annular die-casting cavity for die-casting the bicycle pedal axle sleeve is formed between the two extrusion pins 5 and the circular die sleeve. Then the extrusion feeding system is turned on. The system extrude and inject the high-temperature metal liquid into the annular die-casting cavity, and then wait for the high-temperature metal liquid to cool and take shape. When the high-temperature metal liquid cools to form the middle shaft sleeve of the bicycle pedal, the second semicircular die sleeve 4 and the two extrusion pins 5 are driven in sequence, and the second semicircular die sleeve 4 and the two extrusion pins 5 are controlled to slide back and reset and slide up and down in sequence, and the circular die sleeve is opened and the two extrusion pins 5 are pulled out of the circular die sleeve. After the circular die sleeve is opened, the formed middle shaft sleeve is exposed to the first semicircular die sleeve 3, and finally the formed middle shaft sleeve is removed from the first semicircular die sleeve 3 to complete a die-casting operation, and the above operation process can be repeated to continuously implement die-casting production of the middle shaft sleeve;

[0064] Through two bevel gears, the drive ring 6 and the arc-shaped bevel rack 602 can rotate forward and reverse to engage in sequence to drive the transverse threaded shaft 301 and the threaded propulsion shaft 402 to rotate forward and reverse, driving and controlling the two extrusion pins 5 and the second semicircular die sleeve 4 to slide toward each other and slide back and forth laterally in sequence, completing the telescopic cooperation of the two extrusion pins 5 and the circular die sleeve and the opening and closing of the circular die sleeve at one time, and the arc-shaped bevel rack 602 and the drive ring 6 can be driven to rotate forward and reverse through the U-shaped drive frame 6021.

[0065] In this article, there are several points to note:

[0066] 1. The drawings of the embodiments of the present invention only relate to the structures related to the embodiments of the present invention. Other structures may refer to conventional designs.

[0067] 2. In the absence of conflict, the embodiments of the present invention and the features therein may be combined with each other to form new embodiments.

[0068] The above are merely specific embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any modifications or substitutions that can be easily conceived by a person skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be based on the scope of protection of the claims.

Claims

1. A double extrusion pin mechanism for an aluminum alloy die-casting mold, comprising: A base (1) and an upright support frame (2), wherein the upright support frame (2) is welded to a middle position above the base (1); The invention is characterized in that a first semicircular die sleeve (3) is welded to the inner center position of the vertical support frame (2); a second semicircular die sleeve (4) is installed on a vertical side rod of the vertical support frame (2), and a threaded sleeve (201) is installed through the middle section of the vertical side rod; the second semicircular die sleeve (4) is vertically supported and a threaded propulsion shaft (402) is welded on the outer side of the middle part, a first bevel gear (2011) is welded on the outer end of the threaded sleeve (201), and the threaded propulsion shaft (402) and the threaded sleeve (201) are screwed through and matched; when the second semicircular die sleeve (4) faces the first semicircular die sleeve (3), it abuts against and contacts the first semicircular die sleeve (3) and docks to form a complete circular die sleeve; Two extrusion pins (5) are symmetrically and slidably mounted on the middle sections of the two horizontal bracing side bars of the vertical support frame (2). When in use, the two extrusion pins (5) are slidably docked together and inserted into the circular mold sleeve together. A transverse threaded shaft (301) is rotatably mounted on the outer side of the middle portion of the first semicircular die sleeve (3), a second bevel gear (3011) is sleeved on the head end of the transverse threaded shaft (301), and a threaded ring (302) is screwed onto the transverse threaded shaft (301); two sets of connecting rods (304) are symmetrically rotatably connected between the threaded ring (302) and the two extrusion pins (5); a driving ring (6) is rotatably mounted on the outer side of the middle portion of the vertical support frame (2), and an arcuate bevel rack (602) is slidably mounted on the top end of the driving ring (6), and the arcuate bevel rack (602) is meshed with the two bevel gears in sequence as the driving ring (6) rotates.

2. The double extrusion pin mechanism of an aluminum alloy die-casting mold according to claim 1, characterized in that: An annular sealing plate (501) is welded to one end of the extrusion pin (5) away from the second semicircular die sleeve (4); when the extrusion pin (5) is plugged and assembled with the circular die sleeve, the annular sealing plate (501) abuts against an opening at one end of the circular die sleeve for sealing; An L-shaped hexagonal vertical support shaft (502) is welded to one end of the annular sealing plate (501) away from the extrusion pin (5), and the hexagonal vertical support shaft (502) is slidably engaged with the horizontal support side rods of the vertical support frame (2); The tail ends of the two groups of connecting rods (304) are rotatably connected to the tail ends of the two hexagonal vertical support shafts (502).

3. The double extrusion pin mechanism of an aluminum alloy die-casting mold according to claim 1, characterized in that: The top portion of the second semicircular mold sleeve (4) is welded with an L-shaped sliding rod (401) for transverse support. The L-shaped sliding rod (401) is slidably fitted through the vertical side rod at the corresponding position on the vertical support frame (2), and the tail end is welded and fixed to the head end of the threaded propulsion shaft (402).

4. The double extrusion pin mechanism of an aluminum alloy die-casting mold according to claim 1, characterized in that: The top part of the first semi-circular die sleeve (3) is welded with a cross-bracing injection pipe (303), and the cross-bracing injection pipe (303) is fixedly welded through the vertical side rod pipe at the corresponding position on the vertical support frame (2).

5. The double extrusion pin mechanism of an aluminum alloy die-casting mold according to claim 1, wherein A horizontal positioning ring (202) is welded and sleeved on the outer side of the middle part of the vertical support frame (2), and the driving ring (6) is rotationally matched with the horizontal positioning ring (202).

6. The double extrusion pin mechanism of an aluminum alloy die-casting mold according to claim 1, wherein Two positioning sleeves (601) are symmetrically welded in the peripheral space of the driving ring (6), and a horizontally arranged U-shaped driving frame (6021) is welded on the outer side of the arc-shaped cone rack (602), and the U-shaped driving frame (6021) is slidably penetrated and matched with the two positioning sleeves (601).

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