Magnesium alloy machine head

Abstract

The utility model discloses a magnesium alloy machine head, belongs to the technical field of machine head components, and provides a lighter magnesium alloy machine head which comprises a main shell made of a magnesium alloy material, the main shell is provided with a thin sleeve and a thick sleeve which are integrated, a transition ring is arranged between the thin sleeve and the thick sleeve, and an inner steel sleeve is embedded in the thick sleeve. Two connecting plates are arranged on the outer side face of the end, away from the thin sleeve, of the thick sleeve and are in central symmetry about the axis of the thick sleeve, a main shaft sleeve is arranged on the outer side face of the end, away from the thick sleeve, of the thin sleeve, and the axis of the main shaft sleeve and the axis of the thin sleeve are perpendicular in different planes. A pair of long rib plates is arranged between the outer side faces of the main shaft sleeve, the thin sleeve and the thick sleeve and the end face of one connecting plate. The machine head main body part is subjected to material updating and upgrading, a traditional cast iron machine head is replaced with lighter magnesium alloy, the defect that an original iron machine head is too heavy is overcome, the inner steel sleeve is embedded in the machine head, the abrasion resistance of parts is improved, and the service life of the parts is prolonged.

Description

Technical Field

[0001] This application relates to the field of machine head components, and in particular to a magnesium alloy machine head. Background Technology

[0002] The function of the head assembly is to support the machine, hold the drill rod, rotate the drill, and maintain the powder blowing capacity. The tail of the drill rod is inserted into the hexagonal hole of the rotating sleeve. The hexagonal sealing ring seals all six sides of the drill rod to maintain the powder blowing pressure. The drill clamp supports the drill rod, and the bent foot spring is used to support the machine.

[0003] Most rock drill heads on the market are made of cast iron, which are relatively heavy, weighing up to 3.5 kg, making installation and maintenance relatively inconvenient. Summary of the Invention

[0004] The purpose of this application is to provide a lighter magnesium alloy head.

[0005] To achieve the above objectives, this application provides a magnesium alloy head: comprising a main housing made of magnesium alloy material, the main housing having an integral thin sleeve and a coarse sleeve, a transition ring between the thin sleeve and the coarse sleeve, an inner steel sleeve embedded in the coarse sleeve, a connecting plate on the outer side of the end of the coarse sleeve away from the thin sleeve, two connecting plates, symmetrical about the axis of the coarse sleeve, a main bushing on the outer side of the end of the thin sleeve away from the coarse sleeve, the axis of the main bushing being perpendicular to the axis of the thin sleeve, a pair of long ribs between the outer sides of the main bushing, the thin sleeve and the coarse sleeve and the end face of one of the connecting plates, and a pair of short ribs between the end face of the other connecting plate and the outer side of the coarse sleeve, which can improve structural strength while reducing material consumption.

[0006] As a preferred embodiment, the end face of the transition ring located inside the coarse sleeve has a thickened ring, and an embedded groove is formed between the inner wall of the thickened ring and the end face of the transition ring. One end face of the inner steel sleeve has an embedded ring, which is suitable for fitting with the embedded groove, thereby improving the stability of the fit.

[0007] As a preferred embodiment, the main body of the coarse sleeve is an outer cylinder. The end of the outer cylinder away from the fine sleeve is connected to a swivel ring via a retaining ring. A recessed groove is formed between the inner wall of the swivel ring and the end face of the retaining ring. The outer side of the other end of the inner steel sleeve has a recessed ring, which is suitable for engaging with the recessed ring to form a stepped engagement structure.

[0008] As a preferred embodiment, the thickness of the sinking ring along the axial direction is less than that of the sinking groove, and the inner wall of the sinking groove is also provided with internal threads, which are suitable for engaging with the external threads of the mounting base, and can be fixed by short-distance tightening.

[0009] As a preferred embodiment, the axes of the thin sleeve and the thick sleeve are collinear, and the outer surface of the thin sleeve also has an extension block. The extension direction of the extension block is perpendicular to the axial direction of the thin sleeve, which is used to indicate the direction of the alloy head and reduce the probability of incorrect assembly.

[0010] As a preferred embodiment, each of the long ribs is provided with a pin hole, the axes of the two pin holes are collinear and both are close to the main bushing, for use with the rotating shaft structure.

[0011] As a preferred embodiment, each of the connecting plates also has a reinforcing plate on its outer side, the reinforcing plate having a positioning hole that passes through both end faces, the connecting plate located between the two long ribs having a connecting hole between the two long ribs, and the connecting plate located between the two short ribs having a connecting hole between the two long ribs, for bolts to pass through for fastening.

[0012] As a preferred embodiment, the axes of the connecting hole and the positioning hole are parallel to the axis of the coarse sleeve, the end faces of the connecting plate and the reinforcing plate are flush with the end face of the screw ring, and the thickness of the reinforcing plate along the axis is greater than that of the connecting plate, which can better disperse shear stress.

[0013] Compared with the prior art, the beneficial effects of this application are as follows:

[0014] (1) By updating and upgrading the materials of the main body of the machine head, a lighter magnesium alloy is used to replace the traditional cast iron machine head, which solves the problem of the original iron machine head being too heavy. In addition, a steel sleeve is inlaid inside the machine head to improve the wear resistance and service life of the parts. Since the weight of the machine head has been effectively reduced, the installation and maintenance operations will be more convenient.

[0015] (2) By adopting a stepped fit structure between the inner steel sleeve and the magnesium alloy shell, the main stress-bearing parts of the machine head have good structural strength and stability, thereby ensuring the reliability of the machine head during use. Attached Figure Description

[0016] Figure 1 This is a three-dimensional structural diagram of the magnesium alloy head.

[0017] Figure 2 This is a three-dimensional sectional view of the magnesium alloy head.

[0018] Figure 3 This is a schematic diagram of the first three-dimensional structure of the main housing of the magnesium alloy head.

[0019] Figure 4 This is a schematic diagram of the second three-dimensional structure of the main housing of the magnesium alloy head.

[0020] Figure 5 This is a three-dimensional sectional view of the main housing of the magnesium alloy head.

[0021] Figure 6 This is a three-dimensional cross-sectional view of the inner cylinder liner of the magnesium alloy engine head.

[0022] In the diagram: 1. Inner steel sleeve; 101. Embedded ring; 102. Sinking ring; 2. Main housing; 210. Fine sleeve; 211. Outer extension block; 212. Main shaft sleeve; 220. Coarse sleeve; 221. Outer cylinder; 222. Retaining ring; 223. Engagement ring; 224. Sinking groove; 230. Connecting plate; 231. Connecting hole; 240. Reinforcing plate; 241. Positioning hole; 250. Long rib; 251. Pin hole; 206. Short rib; 270. Transition ring; 271. Thickened ring; 272. Embedded groove. Detailed Implementation

[0023] The present application will be further described below with reference to specific embodiments. It should be noted that, without conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0024] In the description of this application, it should be noted that the directional terms such as "center", "lateral", "longitudinal", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this application.

[0025] It should be noted that the terms "first," "second," etc., in the specification and claims of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence.

[0026] The terms “comprising” and “having”, and any variations thereof, in the specification and claims of this 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 is not necessarily limited to those steps or units that are explicitly listed, but may include other steps or units that are not explicitly listed or that are inherent to such process, method, product, or device.

[0027] like Figure 1-6The magnesium alloy head shown includes a main housing 2 made of magnesium alloy material, which is integrally cast. The main housing 2 has an integral thin sleeve 210 and a coarse sleeve 220. The axes of the thin sleeve 210 and the coarse sleeve 220 are collinear. A transition ring 270 is provided between the thin sleeve 210 and the coarse sleeve 220. The two end faces of the transition ring 270 are flat. An inner steel sleeve 1, which can be made of cast iron, is embedded inside the coarse sleeve 220. The end face of the transition ring 270 inside the coarse sleeve 220 has a thickened ring 271. An embedded groove 272 is formed between the inner wall of the thickened ring 271 and the end face of the transition ring 270. One end face of the inner steel sleeve 1 has a coaxial embedded ring 1. 01, used to fit with the inner groove 272, the main body of the coarse sleeve 220 is the outer cylinder 221, the outer cylinder 221 fits tightly with the coarse sleeve 220, the end of the outer cylinder 221 away from the fine sleeve 210 is connected to the engagement ring 223 through the retaining ring 222, the inner wall of the engagement ring 223 and the end face of the retaining ring 222 form a recessed groove 224, the other end of the inner steel sleeve 1 has a recessed ring 102 on the outer side, which fits perfectly with the recessed ring 102, the thickness of the recessed ring 102 along the axial direction is less than the recessed groove 224, the inner circumferential wall of the recessed groove 224 is also provided with internal threads, which can fit with the external threads on the rock drill power arm mounting seat, and can be fixed by tightening.

[0028] The outer side of the end of the coarse sleeve 220 away from the fine sleeve 210 has an integral connecting plate 230. The connecting plate 230 is located outside the engagement ring 223. The thickness of the connecting plate 230 is uniform and consistent with the thickness of the engagement ring 223. There are two connecting plates 230, which are symmetrical about the axis of the coarse sleeve 220. The outer side of each connecting plate 230 also has an integral reinforcing plate 240. The reinforcing plate 240 has a positioning hole 241 that passes through both ends, which is used to engage with the positioning pin on the rock drill power arm mounting seat, so as to achieve pre-positioning during installation and can quickly and accurately fit together. The end faces of the connecting plate 230 and the reinforcing plate 240 are flush with the end face of the engagement ring 223. The thickness of the reinforcing plate 240 along the axis is larger than that of the connecting plate 230, but the cross-sectional area of ​​the reinforcing plate 240 is smaller than that of the connecting plate 230. Both the connecting plate 230 and the reinforcing plate 240 can be fixed to the end of the rock drill power arm by the constraint members.

[0029] The outer side of the end of the thin sleeve 210 away from the coarse sleeve 220 has a main sleeve 212. The axis of the main sleeve 212 is perpendicular to the axis of the thin sleeve 210. The main sleeve 212 can pass through the shaft structure and is movably connected to the steel cone structure of the rock drill. The outer side of the thin sleeve 210 also has an extension block 211, which is the part left by the riser during the casting process. The extension direction of the extension block 211 is perpendicular to the axis of the thin sleeve 210. Since the extension block 211 can be used as a direction indicator when installing the drill head, it does not need to be cut off, saving the cutting operation step and improving the production efficiency. Moreover, the volume of the extension block 211 is relatively small, which will not excessively increase the weight of the entire drill head. On the other hand, the extension block 211 is located in the middle of the entire drill head and will not interfere with the movement of other components.

[0030] The outer surfaces of the main sleeve 212, the fine sleeve 210, and the coarse sleeve 220 are connected to the end face of a connecting plate 230 by a pair of long ribs 250. The two long ribs 250 are parallel to each other and symmetrical in structure. Each long rib 250 has a pin hole 251. The axes of the two pin holes 251 are collinear and close to the main sleeve 212, allowing the limit pin to pass through and constrain the rotatable parts. The connecting plate 230 located between the two long ribs 250 has a connecting hole 231 between the two long ribs 250, allowing bolts and other connecting parts to pass through for installation and fixation. The other connecting plate 230... There is a pair of short ribs 206 between the end face of the connector and the outer side of the coarse sleeve 220. The short ribs 206 extend from the outside of the connecting plate 230 to the outside of the transition ring 270 and gradually approach the coarse sleeve 220. The connecting plate 230 located between the two short ribs 206 also has a connecting hole 231 between the two long ribs 250, which allows bolts and other connecting parts to pass through for installation and fixation. The axes of the connecting hole 231 and the positioning hole 241 are parallel to the axis of the coarse sleeve 220. In this way, the entire magnesium alloy head can be connected to the rock drill power arm in a very uniform and smooth manner.

[0031] Installation method: During installation, first use a press to press the inner steel sleeve 1 into the main housing 2 until the inner ring 101 is embedded in the inner groove 272 and the sinking ring 102 abuts against the bottom of the sinking groove 224. Then, let the positioning pin on the end mount of the rock drill arm pass through the positioning holes 241 of the two reinforcing plates 240. Then, let the hollow screw pass through the center of the end mount of the rock drill arm and engage with the internal thread of the coarse sleeve 220. At this time, the connecting holes 231 of the two connecting plates 230 are aligned with the through holes on the end mount of the rock drill arm. The bolt passes through the connecting holes 231 and the through holes and is tightened with the nut to complete the fixing of the magnesium alloy drill head. Finally, the other parts are configured on the drill head in sequence for use. Except for the inner steel sleeve 1, the rest of the drill head is made of magnesium alloy, which has good structural strength and lightweight characteristics.

[0032] The basic principles, main features, and advantages of this application have been described above. Those skilled in the art should understand that this application is not limited to the above embodiments. The embodiments and descriptions in the specification are merely the principles of this application. Various changes and modifications can be made to this application without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claims. The scope of protection claimed by this application is defined by the appended claims and their equivalents.

Claims

1. A magnesium alloy machine head, characterized in that: The system includes a main housing (2) made of magnesium alloy, the main housing (2) having an integral thin sleeve (210) and a coarse sleeve (220), a transition ring (270) between the thin sleeve (210) and the coarse sleeve (220), an inner steel sleeve (1) embedded in the coarse sleeve (220), and a connecting plate (230) on the outer side of the end of the coarse sleeve (220) away from the thin sleeve (210), there are two connecting plates (230), which are symmetrical about the axis of the coarse sleeve (220). The outer side of the end of the sleeve (210) away from the coarse sleeve (220) has a main bushing (212), the axis of the main bushing (212) is perpendicular to the axis of the thin sleeve (210) in a different plane, the outer side of the main bushing (212), the thin sleeve (210) and the coarse sleeve (220) has a pair of long ribs (250) between the outer side of the main bushing (212), the thin sleeve (210) and the coarse sleeve (220) and the end face of one of the connecting plates (230), and the end face of the other connecting plate (230) has a pair of short ribs (206) between the outer side of the coarse sleeve (220).

2. The magnesium alloy die head as described in claim 1, characterized in that: The end face of the transition ring (270) located inside the coarse sleeve (220) has a thickened ring (271), and an embedded groove (272) is formed between the inner wall of the thickened ring (271) and the end face of the transition ring (270). One end face of the inner steel sleeve (1) has an embedded ring (101) adapted to fit into the embedded groove (272).

3. The magnesium alloy head as described in claim 1, characterized in that: The main body of the coarse sleeve (220) is the outer cylinder (221). The end of the outer cylinder (221) away from the fine sleeve (210) is connected to a swivel ring (223) through a retaining ring (222). A recessed groove (224) is formed between the inner wall of the swivel ring (223) and the end face of the retaining ring (222). The outer side of the other end of the inner steel sleeve (1) has a recessed ring (102) which is suitable for cooperating with the recessed ring (102).

4. The magnesium alloy die head as described in claim 3, characterized in that: The thickness of the sinking ring (102) along the axial direction is less than that of the sinking groove (224), and the inner wall of the sinking groove (224) is also provided with an internal thread, which is suitable for mating with the external thread of the mounting base.

5. The magnesium alloy die head as described in claim 1, characterized in that: The axes of the thin sleeve (210) and the coarse sleeve (220) are collinear. The outer surface of the thin sleeve (210) also has an extension block (211). The extension direction of the extension block (211) is perpendicular to the axial direction of the thin sleeve (210).

6. The magnesium alloy die head as described in any one of claims 1 to 5, characterized in that: Each of the long ribs (250) is provided with a pin hole (251), the axes of the two pin holes (251) are collinear and both are close to the main bushing (212).

7. The magnesium alloy die head as described in any one of claims 3 to 5, characterized in that: Each of the connecting plates (230) also has a reinforcing plate (240) on its outer side. The reinforcing plate (240) has a positioning hole (241) that passes through both end faces. The connecting plate (230) located between the two long ribs (250) has a connecting hole (231) between the two long ribs (250). The connecting plate (230) located between the two short ribs (206) has a connecting hole (231) between the two long ribs (250).

8. The magnesium alloy die head as described in claim 7, characterized in that: The axes of the connecting hole (231) and the positioning hole (241) are parallel to the axis of the coarse sleeve (220). The end faces of the connecting plate (230) and the reinforcing plate (240) are flush with the end face of the swivel ring (223). The thickness of the reinforcing plate (240) along the axis is greater than that of the connecting plate (230).

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