Novel knockout piston fastening structure of die-casting machine

Abstract

The utility model discloses a novel knockout piston fastening structure of a die casting machine. The novel knockout piston fastening structure comprises a piston, a piston sleeve and a bolt. A first screw hole and a second screw hole are respectively formed in the piston and the piston sleeve; the bolt is suitable for penetrating through the first screw hole to be connected with the second screw hole in a matched mode, so that the piston sleeve tends to move in the direction of the piston. The novel knockout piston has the beneficial effects that compared with an existing knockout piston, the novel knockout piston is provided with the bolt and the screw hole; the connection mode between the bolt and the screw hole is changed by changing the arrangement direction of the bolt and the relative position or arrangement direction of the piston and the screw hole in the piston sleeve; or an elastic piece is arranged between the piston and the piston sleeve; by means of the arrangement, connection between the piston and the piston sleeve is tighter, and therefore the sealing performance and the shockproof performance are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of pistons, in particular to a new type of material hitting piston fastening structure of die casting machine. BACKGROUND

[0002] The material hitting piston in the die casting machine mainly plays a role in storing and releasing energy.

[0003] The material hitting piston will vibrate and be impacted by oil when working; the existing material hitting pistons are mainly connected through threads and thread glue, but the connection mode of threads and thread glue will cause the material hitting piston to fall off after long-term use, thereby affecting the work efficiency.

[0004] Therefore, it is necessary to transform the existing material hitting piston. CONTENT OF THE INVENTION

[0005] The purpose of the present application is to provide a material hitting piston that can solve at least one of the defects in the background art.

[0006] To achieve the above at least one purpose, the technical scheme adopted by the present application is: a new type of material hitting piston fastening structure of die casting machine, comprising a piston, a piston sleeve and a bolt; the piston and the piston sleeve are respectively provided with first screw holes and second screw holes; the bolt is adapted to pass through the first screw hole and the second screw hole to be connected, so that the piston sleeve has a tendency to move towards the piston.

[0007] Preferably, the bolt passes through the first screw hole and the second screw hole to be interference fit, so that the piston sleeve has a tendency to move towards the piston.

[0008] Preferably, a rubber pad is arranged between the abutting end of the piston and the piston sleeve, and the bolt passes through the first screw hole and the second screw hole to be connected, so that the rubber pad is in a deformed state.

[0009] Preferably, the bolt, the first screw hole and the second screw hole are all arranged perpendicular to the axis of the piston sleeve.

[0010] Preferably, the bolt, the first screw hole and the second screw hole are inclined to one side away from the abutting end of the piston sleeve.

[0011] Preferably, the bolt, the first screw hole and the second screw hole are inclined to one side of the abutting end of the piston sleeve.

[0012] Preferably, the angle between the axis of the bolt, the first screw hole and the second screw hole and the radial plane of the piston sleeve is 10° to 30°.

[0013] Preferably, the abutting ends of the piston and the piston sleeve are provided with corresponding inclined surfaces.

[0014] Preferably, the bolt, the first screw hole and the second screw hole are provided with a plurality of; the plurality of bolts, the plurality of first screw holes and the plurality of second screw holes are arranged at equal intervals along the circumferential direction of the piston sleeve.

[0015] Compared with the prior art, the application has the beneficial effects that:

[0016] Compared with the prior art, the application has the beneficial effects that: BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the utility model.

[0018] Figure 2 It is a schematic diagram of the cross section of the first screw hole and the second screw hole arranged in a staggered manner in the first embodiment of the utility model.

[0019] Figure 3 It is a schematic diagram of the cross section of the first screw hole and the second screw hole arranged in a staggered manner in the first embodiment of the utility model. Figure 2 It is a schematic diagram of the cross section of the first screw hole and the second screw hole arranged in a staggered manner in the first embodiment of the utility model.

[0020] Figure 4 It is a schematic diagram of the cross section of the first screw hole and the second screw hole arranged in a staggered manner in the first embodiment of the utility model.

[0021] Figure 5 It is a schematic diagram of the cross section of the first screw hole and the second screw hole arranged in a staggered manner in the first embodiment of the utility model.

[0022] Figure 6 It is a schematic diagram of the cross section of the first screw hole and the second screw hole arranged in a staggered manner in the first embodiment of the utility model. Figure 5 It is a schematic diagram of the cross section of the first screw hole and the second screw hole arranged in a staggered manner in the first embodiment of the utility model.

[0023] Figure 7 It is a schematic diagram of the cross section of the first screw hole and the second screw hole arranged in a staggered manner in the first embodiment of the utility model.

[0024] Figure 8 It is a schematic diagram of the cross section of the first screw hole and the second screw hole arranged in a staggered manner in the first embodiment of the utility model.

[0025] Figure 9 It is a schematic diagram of the cross section of the first screw hole and the second screw hole arranged in a staggered manner in the first embodiment of the utility model.

[0026] In the figure: piston 1, first screw hole 10, first inclined surface 11, piston sleeve 2, second screw hole 20, second inclined surface 21, bolt 3, rubber pad 4. DETAILED DESCRIPTION

[0027] Hereinafter, the present application will be further described in conjunction with specific embodiments, and it should be noted that the following described embodiments or technical features can be combined in any manner to form new embodiments without conflict.

[0028] In the description of the present application, it should be noted that for orientation words, such as the terms "center", "transverse", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc. indicate the orientation and positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and cannot be understood as limiting the specific protection scope of the present application.

[0029] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application are used to distinguish similar objects, and do not necessarily describe a specific order or sequence.

[0030] The terms "include" and "have" and any variations thereof in the specification and claims of the present application are intended to cover non-exclusive inclusion, for example, a process, method, system, product or device that includes a series of steps or units does not have to be limited to only those steps or units clearly listed, but can include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] One preferred embodiment of the present application, as shown in Figures 1 to 9 A new type of material hitting piston fastening structure of die casting machine, including piston 1, piston sleeve 2 and bolt 3. The piston 1 and the piston sleeve 2 are respectively provided with first screw hole 10 and second screw hole 20. The bolt 3 can be connected through the first screw hole 10 and the second screw hole 20 to make the piston sleeve 2 have a tendency to move towards the piston 1.

[0032] It should be known that the main function of the material hitting piston in the die casting machine is to store and release energy. The material hitting piston will vibrate and be impacted by oil when working; but the existing material hitting pistons are mainly connected by threads and thread glue, but the connection mode of threads and thread glue will cause the material hitting piston to fall off after a long time of use, thereby affecting the work efficiency.

[0033] Therefore, in this embodiment, the connection between the bolt 3 and the screw hole is changed by changing the setting direction of the bolt 3 and the relative position or setting direction of the screw hole on the piston 1 and the piston sleeve 2; or an elastic element is set between the piston 1 and the piston sleeve 2; the connection between the piston 1 and the piston sleeve 2 is made tighter by the above settings.

[0034] It should be understood that there are many ways to set the screw holes and bolts 3 on piston 1 and piston sleeve 2, and the specific structure of each way is different; for ease of understanding, two embodiments are used to illustrate this below.

[0035] Example 1:

[0036] like Figures 2 to 7 As shown, the piston 1 and piston sleeve 2 are respectively provided with a first screw hole 10 and a second screw hole 20; the bolt 3, the first screw hole 10 and the second screw hole 20 are all set perpendicular to the axis of the piston sleeve 2.

[0037] It should be understood that the bolt 3 can pass through the first threaded hole 10 and engage with the second threaded hole 20, thereby giving the piston sleeve 2 a tendency to move toward the piston 1, and thus making the connection between the piston 1 and the piston sleeve 2 tighter.

[0038] Therefore, in this embodiment, as Figure 3 As shown, the distance between the second screw hole 20 and the mating end of the piston sleeve 2 is greater than the distance between the first screw hole 10 and the mating end of the piston sleeve 2. However, there are various specific implementation methods for the bolt 3 to pass through the first screw hole 10 and the second screw hole 20 for mating connection. The following describes two specific embodiments, but the specific implementation methods for the bolt 3 to pass through the first screw hole 10 and the second screw hole 20 for mating connection are not limited to these two examples.

[0039] Example 1: such as Figures 2 to 4 As shown, the bolt 3 passes through the first screw hole 10 and is press-fitted to the side of the second screw hole 20 near the piston sleeve 2.

[0040] Specifically, because the bolt 3 and the second threaded hole 20 are interference-fitted on the side near the contact end of the piston sleeve 2, the piston sleeve 2 can move to a certain extent towards the piston 1 when the bolt 3 is connected to the second threaded hole 20 due to the interference fit, thus making the fit between the piston 1 and the piston sleeve 2 tighter. At the same time, it can also improve the sealing performance of the connection between the piston 1 and the piston sleeve 2.

[0041] Example 2: such as Figures 5 to 7 As shown, a rubber pad 4 is provided between the mating ends of piston 1 and piston sleeve 2. Bolt 3 passes through the first screw hole 10 and engages with the second screw hole 20 to make the rubber pad 4 deform.

[0042] Specifically, because the rubber pad 4 is arranged between the piston 1 and the abutting end of the piston sleeve 2, the distance between the second screw hole 20 and the abutting end of the piston sleeve 2 is farther than the distance between the first screw hole 10 and the abutting end of the piston sleeve 2; however, because the rubber pad 4 has a certain elasticity, the piston sleeve 2 can drive the second screw hole 20 to move towards the piston 1 by pressing the piston sleeve 2 to extrude the rubber pad 4. When the first screw hole 10 of the piston 1 and the second screw hole 20 of the piston sleeve 2 are in position, the bolt 3 is connected through the first screw hole 10 and the second screw hole 20, so that the rubber pad 4 remains in the extruded deformed state; and the deformed rubber pad 4 generates a force away from the abutting direction of the piston sleeve 2 and the piston 1 under the elastic force of its own elasticity, so that the second screw hole 20 generates a force in the same direction on the bolt 3; however, the bolt 3 and the second screw hole 20 have been connected, so the bolt 3 generates a relative force towards the abutting end of the piston sleeve 2, thereby making the abutment between the piston sleeve 2 and the piston 1 more compact, and because the rubber pad 4 is arranged, the sealing performance and shockproof performance between the piston 1 and the piston sleeve 2 are improved.

[0043] Meanwhile, the abutting ends of the piston 1 and the piston sleeve 2 are respectively provided with the first inclined surface 11 and the second inclined surface 21 corresponding in shape. As known, the abutment area between the inclined surfaces is larger, so the abutment area of the first inclined surface 11 and the second inclined surface 21 is larger, thereby making the connection between the piston 1 and the piston sleeve 2 more compact and the improvement effect of the sealing performance greater.

[0044] It can be understood that the two examples described above can both meet the requirements of the present application, and those skilled in the art can choose according to actual needs.

[0045] Embodiment Two:

[0046] Compared with Embodiment One: the difference between Embodiment Two is that, as shown in Figure 8 and Figure 9 , the bolt 3, the first screw hole 10 and the second screw hole 20 are all arranged obliquely relative to the axis of the piston sleeve 2.

[0047] It can be understood that there are various specific ways for the bolt 3, the first screw hole 10 and the second screw hole 20 to be arranged obliquely relative to the axis of the piston sleeve 2, including but not limited to the following two.

[0048] Method One: as shown in Figure 8 and Figure 9 , the bolt 3, the first screw hole 10 and the second screw hole 20 are arranged obliquely towards the side away from the abutting end of the piston sleeve 2.

[0049] Method Two: the bolt 3, the first screw hole 10 and the second screw hole 20 are arranged obliquely towards the side of the abutting end of the piston sleeve 2.

[0050] It should be known that the above two ways can meet the needs of the present application, and those skilled in the art can choose according to actual needs; in the embodiment, the first way is preferred.

[0051] However, in the embodiment, the setting mode of the first way can make the bolt 3 generate a force in the direction of the piston sleeve 2 when the bolt 3 is connected through the first screw hole 10 and the second screw hole 20, whether it is interference connection or setting rubber pad 4, so that the fit between the piston 1 and the piston sleeve 2 is more compact, and the sealing performance and shockproof performance are more improved.

[0052] Therefore, in the embodiment, the bolt 3, the first screw hole 10 and the second screw hole 20 are preferably set to be inclined to the side away from the fitting end of the piston sleeve 2.

[0053] In the embodiment, the inclination angle of the bolt 3, the first screw hole 10 and the second screw hole 20 needs to be limited.

[0054] It can be understood that if the inclination angle of the bolt 3, the first screw hole 10 and the second screw hole 20 is set too large, the length of the bolt 3 itself needs to be elongated; but the wall thickness of the piston sleeve 2 is relatively thin, so the installation depth is not enough.

[0055] Therefore, in the embodiment, the angle between the axis of the bolt 3, the first screw hole 10 and the second screw hole 20 and the radial plane of the piston sleeve 2 is limited to 10° to 30°.

[0056] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited to the above embodiments, and the above embodiments and descriptions in the specification are only the principles of the present application. Without departing from the spirit and scope of the present application, various changes and improvements can be made to the present application, and these changes and improvements all fall within the scope of the claimed present application. The scope of protection claimed by the present application is defined by the appended claims and their equivalents.

Claims

1. A novel piston fastening structure for a die-casting machine, characterized in that, include: A piston, a piston sleeve, and a bolt; the piston and the piston sleeve are respectively provided with a first threaded hole and a second threaded hole; the bolt passes through the first threaded hole and is interference-fitted with the second threaded hole so that the piston sleeve has a tendency to move in the direction of the piston.

2. The novel feeding piston fastening structure for a die-casting machine as described in claim 1, characterized in that: A rubber pad is provided between the mating ends of the piston and the piston sleeve. The bolt passes through the first screw hole and engages with the second screw hole to deform the rubber pad.

3. A novel piston fastening structure for a die-casting machine as described in claim 1 or 2, characterized in that: The bolt, the first threaded hole, and the second threaded hole are all arranged perpendicular to the axis of the piston sleeve.

4. A novel piston fastening structure for a die-casting machine as described in claim 1 or 2, characterized in that: The bolt, the first screw hole, and the second screw hole are inclined toward the side away from the piston sleeve contact end.

5. A novel piston fastening structure for a die-casting machine as described in claim 1 or 2, characterized in that: The bolt, the first screw hole, and the second screw hole are inclined toward the side of the piston sleeve fitting end.

6. The novel feeding piston fastening structure for a die-casting machine as described in claim 4, characterized in that: The angle between the axes of the bolt, the first threaded hole, and the second threaded hole and the radial plane of the piston sleeve is 10° to 30°.

7. The novel feeding piston fastening structure for a die-casting machine as described in claim 2, characterized in that: The piston and the piston sleeve are respectively provided with beveled surfaces of corresponding shapes at their mating ends.

8. The novel feeding piston fastening structure for a die-casting machine as described in claim 1, characterized in that: Multiple bolts, multiple first screw holes, and multiple second screw holes are provided; the multiple bolts, multiple first screw holes, and multiple second screw holes are arranged at equal intervals along the circumferential direction of the piston sleeve.

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