Retaining structure of mechanical shoveling machine

Abstract

The utility model relates to the technical field of dies, in particular to a mechanical shovel machine retaining structure which comprises a push rod installed on a die, the telescopic end of the push rod is connected with a shovel machine, the shovel machine is pushed to move forwards when the push rod stretches, a groove is formed in the rear end, close to the push rod, of the shovel machine, and the telescopic end of the push rod stretches into the groove to push the shovel machine to move forwards. A through hole is formed in the front end of the side wall of the groove, a retaining block penetrates through the through hole in a sliding mode, when the telescopic end of the push rod stretches to push the shoveling machine to move in place, the telescopic end of the push rod makes contact with the retaining block and pushes the retaining block outwards to penetrate out of the through hole to be clamped into a positioning groove formed in the die, and the retaining block and the end of the telescopic end of the oil cylinder type push rod are stopped. Therefore, the shovel machine does not retreat after the inner sliding block is stressed.

Description

Technical Field

[0001] The utility model relates to the technical field of molds, in particular to a mechanical shovel machine back-off stop structure. Background Art

[0002] The ejection structure of the mold directly adopts the oil cylinder to drive the shovel, and uses the oil pressure in the oil cylinder to support the slide insert to retreat.

[0003] In order to solve the problem of the inner slider retreating, a new mechanical shovel anti-retraction structure is developed. A movable anti-retraction block is made at the top of the cylinder push rod. When the product is being molded and the injection molding pressure is maintained, the cylinder pushes the internal anti-retraction block of the shovel back to its position, and the anti-retraction block returns to the positioning groove to support the overall slider structure from retreating. In actual mold production, when the anti-retraction block is subjected to the reverse force brought by the injection molding pressure, it will stop and move to prevent the shovel from retreating, and the product will not have any defects after molding. Utility Model Content

[0004] The utility model aims at least to solve the problem in the prior art that the oil pressure in the oil cylinder is used to support the sliding block so as not to retreat, and the stability is poor.

[0005] The present invention provides a mechanical shovel stop structure, which is achieved by the following specific technical means: it includes a push rod installed on the mold, the telescopic end of the push rod is connected to the shovel, and when the push rod is extended, the shovel is pushed forward to push the inner sliding block in the mold, which is located below the shovel and in sliding contact with the inclined surface of the bottom side of the shovel, out obliquely in the mold; the shovel is provided with a groove near the rear end of the push rod, and the telescopic end of the push rod extends into the groove to push the shovel forward, and a through hole is provided at the front end of the side wall of the groove, and a stop block is slidably penetrated in the through hole, and when the telescopic end of the push rod is extended to push the shovel into place, the telescopic end of the push rod contacts the stop block and pushes the stop block outward to pass through the through hole and snap into the positioning groove provided on the mold.

[0006] Preferred technical solution one: guide strips are fixed on both sides of the shovel in the mold, and a channel for the shovel to slide is formed between the two groups of guide strips. The positioning grooves are opened on the sides of the two groups of guide strips that are close to each other. Before the push rod is extended, the telescopic end of the push rod contacts the inner end of the stop block in the groove, and the through hole on the shovel is opposite to the positioning groove. At this time, the outer end of the stop block extends from the through hole and is inserted into the positioning groove to lock the position of the shovel.

[0007] Preferred technical solution two: the inner end of the stop block is a sloped structure, and the front part of the telescopic end of the push rod is a slope. When the through hole is facing the positioning groove, the stop block can slide along the sloped surface of the front part of the telescopic end of the push rod to the straight surface on the middle and rear side of the telescopic end.

[0008] Preferred technical solution three: the middle part of the stop block is provided with a pin-inserting movable groove opened along the length direction of the stop block, the limiting pin fixed in the through hole is inserted into the pin-inserting movable groove, and the setting of the limiting pin prevents the stop block from escaping from the through hole.

[0009] Preferred technical solution four: the positioning groove is a trapezoidal inner groove, and the outer end of the stop block is a trapezoidal structure adapted to the trapezoidal inner groove.

[0010] Preferred technical solution five: a rear stopper protrusion is fixed in the groove, and the telescopic end of the push rod slides in the space enclosed between the rear stopper protrusion and the front end of the groove.

[0011] The above structure enables this solution to have the following beneficial effects:

[0012] 1. After the shovel machine is closed, the stop block and the telescopic end of the cylinder push rod are stopped, so that the shovel machine does not retreat after the inner slide is stressed;

[0013] 2. This structure has a larger force-bearing surface, and the inner slider is suitable for larger structures. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The accompanying drawings are used to provide a further understanding of the present invention and constitute a part of the specification. Together with the embodiments of the present invention, they are used to explain the present invention and do not constitute a limitation of the present invention. In the accompanying drawings:

[0015] Figure 1 This is a schematic diagram of the overall structure of this scheme;

[0016] Figure 2 This is a top view of the shovel machine of this scheme;

[0017] Figure 3 This is the main view of the shovel in this scheme;

[0018] Figure 4 This is a cross-sectional view of the shovel machine of this scheme;

[0019] Figure 5 This is a schematic diagram of the structure of the telescopic end of the push rod and the stop block of this solution.

[0020] Among them, 1. mold, 2. push rod, 21. telescopic end, 3. shovel, 31. groove, 32. rear stop protrusion, 33. through hole, 34. limit pin, 4. stop block, 41. pin movable groove, 5. inner slide block, 6. guide strip, 61. positioning groove. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all of the embodiments; based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the utility model.

[0022] See also Figure 1-Figure 4 The mechanical shovel stop structure includes a cylinder push rod 2 fixedly mounted on the mold 1, a groove 31 is provided at the rear end of the shovel 3 near the push rod 2, and the telescopic end of the push rod 2 extends into the groove 31, driving the shovel 3 to move forward and backward. When the push rod 2 is extended, the shovel 3 is pushed forward to push the inner slider 5 located below the shovel 3 in the mold 1 and in sliding contact with the bottom inclined surface of the shovel 3 obliquely out of the mold 1, so that the inner slider 5 extends from the mold groove to eject the injection molded product in the mold groove; a through hole 33 is provided at the front end of the side wall of the groove 31, and a stop block 4 is slidably penetrated in the through hole 33. When the push rod 2 extends the telescopic end to push the shovel 3 forward to the position, the telescopic end of the push rod 2 contacts the stop block 4 and pushes the stop block 4 outward to pass through the through hole 33 and snap into the positioning groove 61 provided on the mold 1;

[0023] The inner end of the stop block 4 is a bevel structure, and the front part of the telescopic end head 21 of the push rod 2 is a bevel, so that when the through hole 33 is directly opposite to the positioning groove 61, the stop block 4 can slide along the bevel of the front part of the telescopic end head 21 of the push rod 2 to the straight surface of the middle and rear side of the telescopic end head 21, so that the stop block 4 can be smoothly extended from the through hole 33. A rear stop protrusion 32 is fixed in the groove 31, and the telescopic end head 21 of the push rod 2 is in the space enclosed between the rear stop protrusion 32 and the front end of the groove 31. The push rod 2 slides occasionally, and the through hole 33 is located in front of the rear stop convex block 32. When the push rod 2 retracts, the rear end convex ridge of the telescopic end head 21 contacts the rear stop convex block 32 and is blocked by the rear stop convex block 32, limiting the moving space of the telescopic end head 21 of the push rod 2 in the groove 31. When the rear end convex ridge of the telescopic end head 21 of the push rod 2 contacts the rear stop convex 32, the inner end of the stop block 4 moves to contact the front inclined surface of the telescopic end head 21, and the outer end of the stop block 4 can be disengaged from the positioning groove 61.

[0024] The positioning groove 61 is a trapezoidal inner groove 31, and the outer end of the backstop block 4 is a trapezoidal structure adapted to the trapezoidal inner groove 31. The setting of the trapezoidal structure enables the backstop block 4 to smoothly withdraw from the positioning groove 61 when the telescopic end of the push rod 2 retracts to drive the shovel 3 to move back.

[0025] See also Figure 2-Figure 4, a mechanical shovel stop structure, a guide strip 6 is fixed on both sides of the shovel 3 in the mold 1, and a channel for the shovel 3 to slide is formed between the two groups of guide strips 6, and the two groups of positioning grooves 61 are respectively opened on the mutually close sides of the two groups of guide strips 6. Before the push rod 2 is extended, the outer protruding end of the stop block 4 slides in contact with the guide strip 6. At this time, the inclined surface of the telescopic end of the push rod 2 contacts the inner end of the stop block 4 located in the groove 31. When the push rod 2 is extended to push the shovel 3 forward in the channel, the through hole 33 on the shovel 3 is opposite to the positioning groove 61. At this time, the stop block 4 moves horizontally under the thrust of the telescopic end of the push rod 2, so that the inner end of the stop block 4 slides along the inclined surface of the front part of the telescopic end of the push rod 2 to the straight surface of the middle and rear part, thereby gradually pushing the outer end of the stop block 4 to extend from the through hole 33 and snap into the positioning groove 61 to lock the position of the shovel 3.

[0026] See also Figure 4-Figure 5 , a mechanical shovel machine back-off structure, a pin-inserting movable groove 41 is provided in the middle of the back-off block 4 along the length direction of the back-off block 4, a limiting pin 34 fixed in the through hole 33 is inserted into the pin-inserting movable groove 41, and when the back-off block 4 slides in the through hole 33, the limiting pin 34 slides in the pin-inserting movable groove 41, and the setting of the limiting pin 34 prevents the back-off block 4 from falling out of the through hole 33.

[0027] Compared with the conventional cylinder push rod 2 that directly drives the shovel 3, the overall shovel 3 retreats with the support of the oil pressure inside the cylinder, and the injection pressure pushes the position backward. In order to solve the problem of insufficient force of the cylinder, the push rod 2 drives the telescopic end head 21 to directly clamp the stop block 4, and the stop block 4 is positioned in the positioning groove 61, which effectively prevents the overall position from retreating after being subjected to force.

[0028] Although the embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A mechanical shovel back-stop structure, characterized in that: The invention comprises a push rod (2) installed on the mold (1), wherein the telescopic end of the push rod (2) is connected to a shovel (3), and when the push rod (2) is extended, the shovel (3) is pushed forward; a groove (31) is provided on the shovel (3) near the rear end of the push rod (2), and the telescopic end of the push rod (2) extends into the groove (31); a through hole (33) is provided on the front end of the side wall of the groove (31), and a stop block (4) is slidably penetrated in the through hole (33); when the push rod (2) extends the telescopic end to push the shovel (3) to move into position, the telescopic end head (21) of the push rod (2) contacts the stop block (4) and pushes the stop block (4) outward to pass through the through hole (33) and snap into the positioning groove (61) provided on the mold (1).

2. A mechanical shovel back-stop structure according to claim 1, characterized in that: Guide strips (6) are fixed on both sides of the shovel (3) in the mold (1), a channel for the shovel (3) to slide is formed between the two groups of guide strips (6), and the positioning grooves (61) are arranged on the sides of the two groups of guide strips (6) that are close to each other.

3. A mechanical shovel back-stop structure according to claim 2, characterized in that: The inner end of the stop block (4) is an inclined surface structure, and the front part of the telescopic end head (21) of the push rod (2) is an inclined surface, so that when the through hole (33) is directly opposite to the positioning groove (61), the stop block (4) can slide along the inclined surface of the front part of the telescopic end head (21) of the push rod (2) to the straight surface on the rear side of the telescopic end head (21).

4. A mechanical shovel back-stop structure according to claim 1, characterized in that: The middle part of the stop block (4) is provided with a pin-inserting movable groove (41) opened along the length direction of the stop block (4), and the limiting pin (34) fixed in the through hole (33) is inserted into the pin-inserting movable groove (41) to slide.

5. The mechanical shovel back-stop structure according to claim 2, characterized in that: The positioning groove (61) is a trapezoidal inner groove (31), and the outer end of the stop block (4) is a trapezoidal structure adapted to the trapezoidal inner groove (31).

6. A mechanical shovel back-stop structure according to claim 1, characterized in that: A rear stop lug (32) is fixed in the groove (31), the telescopic end head (21) of the push rod (2) slides in the space enclosed between the rear stop lug (32) and the front end of the groove (31), and the through hole (33) is located at the front side of the rear stop lug (32).

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