Ejection structure of a hydraulic retarder impeller sand core mold

Abstract

The utility model relates to provide a kind of ejection structure of hydraulic retarder impeller sand core mould, its simple structure can realize sand core disposable stripping, improve stripping efficiency under the premise of effectively preventing sand core damage, it is characterized by: it includes briquetting, oil cylinder connects the briquetting, guiding sleeve one end connects oil cylinder piston rod, the guiding sleeve other end connects top block, the guiding sleeve can rotate around the oil cylinder piston rod, the guiding sleeve both sides are provided with the helical groove of opposite direction, the bracket is provided on the briquetting, the guide column is provided on the bracket, the guide column is passed through the helical groove, when the guiding sleeve moves up and down, the helical groove is guided to realize guiding sleeve rotation by the guide column.

Description

Technical Field

[0001] This utility model relates to the technical field of sand core forming molds, and in particular to an ejection structure for a hydraulic retarder blade mold. Background Technology

[0002] The impeller of the hydraulic retarder consists of multiple blades, and the blades are arranged at a certain angle to the blade shaft. When making the sand core mold of the hydraulic retarder impeller, because the blades are at a certain angle to the blade shaft, the ejection mechanism ejects in a straight line when forming the sand core mold, and the impeller sand core mold cannot be demolded. It needs to be demolded multiple times, and it is also easy to damage the sand core mold. Summary of the Invention

[0003] To address the aforementioned technical problems, this utility model provides an ejection structure for a hydraulic retarder impeller sand core mold. Its structure is simple, enabling one-time demolding of the sand core, effectively preventing damage to the sand core while improving demolding efficiency.

[0004] The technical solution is as follows: an ejection structure for a hydraulic retarder impeller core mold, characterized in that: it includes a pressure block, a hydraulic cylinder connected to the pressure block, a guide sleeve connected at one end to the piston rod of the hydraulic cylinder, and a top block connected at the other end of the guide sleeve. The guide sleeve can rotate around the piston rod of the hydraulic cylinder. Helical grooves with opposite directions are provided on both sides of the guide sleeve. A bracket is provided on the pressure block, and a guide post is provided on the bracket. The guide post passes through the helical groove. When the guide sleeve moves up and down, the helical groove is guided by the guide post to realize the rotation of the guide sleeve.

[0005] A further feature is that the cylinder piston rod is connected to the support shaft, and the guide sleeve is connected to the support shaft via a bearing; the helical groove forms a 5-15 degree angle with the center of the guide sleeve; and the support shaft is connected to the cylinder piston rod via a thread.

[0006] This utility model adopts the above-mentioned structure. The hydraulic cylinder is connected to the pressure block, one end of the guide sleeve is connected to the piston rod of the hydraulic cylinder, and the other end of the guide sleeve is connected to the top block. The guide sleeve can rotate around the piston rod of the hydraulic cylinder. The two sides of the guide sleeve are provided with spiral grooves in opposite directions. A bracket is provided on the pressure block, and a guide post is provided on the bracket. The guide post passes through the spiral groove. When the guide sleeve moves up and down, the spiral groove is guided by the guide post to achieve rotation. When the sand core mold is demolded, the top block is driven by the hydraulic cylinder to move linearly while the guide sleeve is guided by the spiral groove and the guide post to achieve rotation. This ensures that the top block moves linearly and rotates at the same time, thereby ejecting the blade sand core with a certain tilt angle. This can achieve one-time demolding of the sand core and improve demolding efficiency while effectively preventing damage to the sand core. Attached Figure Description

[0007] Figure 1 This is a schematic diagram of the impeller sand core mold for the hydraulic retarder of the present invention;

[0008] Figure 2 for Figure 1 A top-down view. Detailed Implementation

[0009] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0010] See Figure 1 and Figure 2 An ejection structure for a hydraulic retarder impeller core mold includes a pressure block 1, a hydraulic cylinder 2 connected to the pressure block 1, a guide sleeve 3 connected at one end to a piston rod 4 of the hydraulic cylinder, and a top block 5 connected at the other end of the guide sleeve 3. The guide sleeve 3 can rotate around the piston rod 4 of the hydraulic cylinder. Spiral grooves 6-1 and 6-2 with opposite directions are provided on both sides of the guide sleeve 3. A bracket 7 is provided on the pressure block 1, and a guide post 8 is provided on the bracket 7. The guide post 8 passes through the spiral grooves 6-1 and 6-2. When the guide sleeve 3 moves up and down, the spiral grooves 6-1 and 6-2 are guided by the guide post to achieve rotation of the guide sleeve. When the core mold is demolded, the top block moves linearly with the guide sleeve driven by the hydraulic cylinder, while the guide sleeve rotates through the spiral grooves and the guide post, thus ensuring that the top block rotates while moving linearly. This ejects the impeller core with a certain tilt angle, achieving one-time demolding of the core. This effectively prevents damage to the core and improves demolding efficiency.

[0011] The piston rod 4 of the hydraulic cylinder is connected to the support shaft 9, and the guide sleeve 3 is connected to the support shaft 9 through the bearing 10 to ensure the stability of the rotation of the guide sleeve.

[0012] The preferred embodiment of this invention has spiral grooves 6-1 and 6-2 at an angle of 5-15 degrees to the center of the guide sleeve.

[0013] The support shaft 9 is connected to the cylinder piston rod 4 via thread 11, which enables simple and convenient installation of the guide sleeve and easy replacement of the support shaft, effectively reducing costs.

[0014] The present invention and its embodiments have been described above in an illustrative manner. This description is not restrictive. The figures shown are only one embodiment of the present invention. The actual structure is not limited to this. As long as those skilled in the art are inspired by this description and design similar structures and embodiments without departing from the spirit of the invention, they should all fall within the protection scope of the present invention.

Claims

1. An ejection structure for a hydraulic retarder impeller core mold, characterized in that: It includes a pressure block, a hydraulic cylinder connected to the pressure block, a guide sleeve with one end connected to the piston rod of the hydraulic cylinder and the other end connected to a top block. The guide sleeve can rotate around the piston rod of the hydraulic cylinder. The guide sleeve has spiral grooves with opposite directions on both sides. A bracket is provided on the pressure block, and a guide post is provided on the bracket. The guide post passes through the spiral groove. When the guide sleeve moves up and down, the spiral groove is guided by the guide post to realize the rotation of the guide sleeve.

2. The ejection structure of a hydraulic retarder impeller core mold according to claim 1, characterized in that: The piston rod of the hydraulic cylinder is connected to the support shaft, and the guide sleeve is connected to the support shaft through a bearing.

3. The ejection structure of a hydraulic retarder impeller core mold according to claim 1, characterized in that: The spiral groove forms an angle of 5-15 degrees with the center of the guide sleeve.

4. The ejection structure of a hydraulic retarder impeller core mold according to claim 2, characterized in that: The support shaft is threadedly connected to the cylinder piston rod.

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