Shock absorber and rotary drill

Abstract

The utility model discloses a shock absorber and a rotary drill. The shock absorber comprises: a joint assembly, which defines a receiving space, in which a plurality of guide rods are installed, and the plurality of guide rods are arranged at intervals around the circumference; an upper shock-absorbing pad and a lower shock-absorbing pad, both of which are installed in the receiving space and are slidably sleeved on the guide rod; a lower joint, a first end in the length direction of which is provided with a connecting ring, and a second end in the length direction is used to connect a rotary drill rod; a connecting ring is arranged between the upper shock-absorbing pad and the lower shock-absorbing pad, and the connecting ring is provided with a guide hole for the guide rod to pass through, and the connecting ring can be raised and lowered relative to the guide rod. According to the shock absorber of the utility model, the thread of the rotary drill rod can be prevented from being sintered and damaged when the rod is connected and unconnected, and the influence of the vibration in the circumferential direction of the rotation on the rotary power head can be effectively reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of shock absorbers, in particular to a shock absorber and a rotary drill. Background Art

[0002] In a rotary drill, the shock absorber is used to connect the rotary power head and the rotary drill rod. When the rotary drill rod is rotating downward to break rocks, the vibration generated during the operation will be transmitted back to the rotary power head, causing damage to the rotary power head or shortening the service life of the rotary power head. The purpose of the shock absorber is to reduce the impact of this vibration on the rotary power head. However, the current shock absorbers for rotary drills do not have floating space and shock absorption function in the circumferential direction of rotation. The lack of floating space makes it easy to cause thread damage when the rotary drill rod is screwed in and out during the process of connecting and unloading the rod, and the lack of shock absorption function in the circumferential direction of rotation easily causes damage to the rotary power head. Utility Model Content

[0003] The utility model aims to solve at least one of the technical problems existing in the prior art. To this end, the utility model provides a shock absorber that can prevent the thread of the cone drill rod from being sintered and damaged when the rod is connected and disconnected, and can also effectively reduce the impact of the vibration in the circumferential direction of the rotation on the rotary power head.

[0004] The utility model also discloses a rotary drill comprising the shock absorber.

[0005] The shock absorber according to the first embodiment of the utility model comprises:

[0006] The joint assembly defines a receiving space, wherein a plurality of guide rods are installed in the receiving space, and the plurality of guide rods are arranged at intervals around a circumference;

[0007] The upper shock-absorbing pad and the lower shock-absorbing pad are both installed in the accommodation space and are both slidably sleeved on the guide rod;

[0008] The lower joint has a connecting ring at the first end in the length direction and is used to connect a roller drill rod at the second end in the length direction; the connecting ring is arranged between the upper shock-absorbing pad and the lower shock-absorbing pad, and the connecting ring is provided with a guide hole for the guide rod to pass through, and the connecting ring can be lifted and lowered relative to the guide rod.

[0009] The shock absorber according to the embodiment of the utility model has at least the following beneficial effects:

[0010] By installing a guide rod in the accommodating space of the joint assembly and the guide rod passing through the lower joint, sliding guidance of the lower joint is achieved; a plurality of guide rods are provided, and the plurality of guide rods are arranged at intervals around the circumference, and an upper shock-absorbing pad and a lower shock-absorbing pad are also installed in the accommodating space, which can effectively reduce the damage of the rotary power head to the vibration in the rotating circumferential direction; the lower joint is movably arranged between the upper shock-absorbing pad and the lower shock-absorbing pad, so that the lower joint has a floating space, which effectively avoids thread damage caused by the cone drill rod being screwed in and out during the process of connecting and disconnecting the rod.

[0011] According to some embodiments of the utility model, the joint assembly includes an upper joint, an outer shell and a lower end cover, the upper joint and the lower end cover are respectively connected to two ends of the outer shell, and the two ends of the guide rod are respectively installed on the upper joint and the lower end cover.

[0012] According to some embodiments of the present invention, the shell is provided with a center hole axially penetrating the shell, the upper joint portion extends into the center hole, and / or the lower end cover portion extends into the center hole.

[0013] According to some embodiments of the utility model, the upper joint is provided with a first insertion hole for inserting the first end of the guide rod, and the lower end cover is provided with a second insertion hole for inserting the second end of the guide rod.

[0014] According to some embodiments of the present invention, the second insertion hole is connected to a threaded hole, and a clamping bolt is installed in the threaded hole; the clamping bolt abuts against the second end of the guide rod inserted in the second insertion hole.

[0015] According to some embodiments of the present invention, the threaded hole is concentrically arranged with the second insertion hole.

[0016] According to some embodiments of the present invention, the thickness of the upper shock-absorbing pad is not less than the thickness of the lower shock-absorbing pad.

[0017] According to some embodiments of the utility model, a guide tube is installed in the guide hole, and the guide rod passes through the guide tube.

[0018] According to some embodiments of the present invention, the guide tube is made of non-metallic material.

[0019] The rotary drill according to the second embodiment of the utility model comprises a rotary power head, a drill rod and the above-mentioned shock absorber, wherein the rotary power head is connected to the drill rod via the shock absorber.

[0020] According to the embodiment of the utility model, the rotary drill includes the above-mentioned shock absorber, so it has at least all the beneficial effects of the shock absorber. The shock absorber realizes the sliding guidance of the lower joint by installing a guide rod in the accommodating space of the joint assembly, and the guide rod passes through the lower joint; there are multiple guide rods, and the multiple guide rods are arranged at intervals around the circumference, and the upper shock-absorbing pad and the lower shock-absorbing pad are also installed in the accommodating space, which can effectively reduce the damage to the rotary power head caused by the vibration in the rotating circumferential direction; the lower joint is movably arranged between the upper shock-absorbing pad and the lower shock-absorbing pad, so that the lower joint has a floating space, which effectively avoids the thread damage caused by the rotary drill rod being screwed in and out during the process of connecting and unloading the rod; the rotary drill of this embodiment prolongs the service life and reduces the maintenance cost by adopting the above-mentioned shock absorber.

[0021] Additional aspects and advantages of the present invention will be given in part in the following description, and in part will become apparent from the following description, or will be learned through the practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The present invention is further described below with reference to the accompanying drawings and embodiments, wherein:

[0023] Figure 1 It is a schematic diagram of the structure of an embodiment of the utility model;

[0024] Figure 2 It is a schematic diagram of the assembly of an embodiment of the utility model;

[0025] Figure 3 A cross-sectional view of an embodiment of the utility model;

[0026] Figure 4 for Figure 3 The enlarged view of point A in the middle;

[0027] Figure 5 for Figure 3 Enlarged view of point B in the middle.

[0028] Figure Number:

[0029] Joint assembly 100, guide rod 101, upper shock absorbing pad 102, lower shock absorbing pad 103, upper joint 110, first plug hole 111, housing 120, center hole 121, lower end cover 130, second plug hole 131, threaded hole 132, locking bolt 140;

[0030] Lower joint 200 , connecting ring 210 , guide hole 211 , guide tube 220 . DETAILED DESCRIPTION

[0031] The embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.

[0032] In the description of the present invention, it should be understood that the descriptions involving orientation, such as the orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0033] In the description of the present utility model, "a plurality" means more than two. If there is a description of "first" or "second", it is only for the purpose of distinguishing the technical features, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.

[0034] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.

[0035] Reference Figures 1 to 5 The shock absorber of the first embodiment of the utility model comprises a joint assembly 100 and a lower joint 200 movably mounted on the joint assembly 100, the joint assembly 100 is used to connect the rotary power head, and the lower joint 200 is used to connect the roller drill pipe. Specifically, the joint assembly 100 defines a receiving space, a connecting ring 210 is provided at the first end of the lower joint 200 in the length direction, and the second end in the length direction is used to connect the roller drill pipe; the receiving space is cylindrical, the connecting ring 210 is also cylindrical, the diameter of the connecting ring 210 is larger than the diameter of the lower joint 200, and the connecting ring 210 protrudes in the radial direction of the lower joint 200. A plurality of guide rods 101 are installed in the receiving space, the plurality of guide rods 101 are arranged at intervals around the circumference, the connecting ring 210 is provided with a guide hole 211 for the guide rod 101 to pass through, and the connecting ring 210 can be raised and lowered relative to the guide rod 101; the torque of the rotary power head is transmitted to the lower joint 200 through the plurality of guide rods 101, and then transmitted to the roller drill pipe.

[0036] Further, in the embodiment of the utility model, a guide tube 220 is installed in the guide hole 211, and the guide rod 101 is inserted into the guide tube 220, and the guide tube 220 is made of non-metallic material, such as polytetraethylene. The guide tube 220 is fixedly installed on the inner wall of the guide hole 211, and the inner diameter of the guide tube 220 is slightly larger than the diameter of the guide rod 101. The guide tube 220 is provided, and the guide tube 220 is made of non-metallic material, which can effectively reduce the friction when the lower joint 200 is raised and lowered relative to the guide rod 101, thereby reducing the wear of both.

[0037] In the embodiment of the utility model, an upper shock-absorbing pad 102 and a lower shock-absorbing pad 103 are also installed in the accommodation space, the upper shock-absorbing pad 102 is arranged above the lower shock-absorbing pad 103, the upper shock-absorbing pad 102 and the lower shock-absorbing pad 103 are both slidably sleeved on the guide rod 101, and the connecting ring 210 is arranged between the upper shock-absorbing pad 102 and the lower shock-absorbing pad 103. By arranging the upper shock-absorbing pad 102 and the lower shock-absorbing pad 103, the damage to the rotary power head caused by the vibration in the circumferential direction of rotation can be effectively reduced; the lower joint 200 is movably arranged between the upper shock-absorbing pad 102 and the lower shock-absorbing pad 103, so that the lower joint 200 has a floating space, which effectively avoids the thread damage caused by the screwing in and out of the cone drill rod during the process of connecting and unloading the rod.

[0038] In the embodiment of the present invention, the joint assembly 100 includes an upper joint 110, a housing 120 and a lower end cover 130. The upper joint 110 and the lower end cover 130 are respectively connected to the two ends of the housing 120, and the two ends of the guide rod 101 are respectively installed on the upper joint 110 and the lower end cover 130. Figures 1 to 3 As shown, the top of the upper joint 110 is connected to the rotary power head by threads and is fixed with an opening and closing clamp; the lower joint 200 is threadedly connected to a transition joint, and the transition joint is connected to the roller drill pipe. The connection between the lower joint 200 and the transition joint is also fixed with an opening and closing clamp.

[0039] In the embodiment of the utility model, the upper shock-absorbing pad 102 and the lower shock-absorbing pad 103 are made of the same or different materials, and the thickness of the upper shock-absorbing pad 102 is not less than the thickness of the lower shock-absorbing pad 103. Specifically, it is preferred that the upper shock-absorbing pad 102 and the lower shock-absorbing pad 103 are made of the same material, such as polyurethane material. The upper shock-absorbing pad 102 and the lower shock-absorbing pad 103 are made of the same material to reduce the manufacturing cost; similarly, since the roller drill rod is supporting the upper shock-absorbing pad 102 upward during operation, it is preferred that the thickness of the upper shock-absorbing pad 102 is greater than the thickness of the lower shock-absorbing pad 103, so that a better shock-absorbing effect can be achieved.

[0040] In the embodiment of the utility model, the housing 120 is cylindrical, and the housing 120 is provided with a center hole 121 that runs through the housing 120 in the central axial direction, the upper joint 110 is connected to the top of the housing 120, and the lower end cover 130 is connected to the bottom of the housing 120. The upper joint 110 and the lower end cover 130 are connected to the housing 120 by fasteners, and the fasteners can be bolts and other structures. The accommodation space is formed in the center hole 121 and is formed between the upper joint 110 and the lower end cover 130.

[0041] In the embodiment of the present invention, the upper joint 110 partially extends into the center hole 121, and / or the lower end cover 130 partially extends into the center hole 121. Figures 3 to 5 As shown, the upper joint 110 and the lower end cover 130 of the present embodiment are connected to the outer shell 120 by bolts. After a long period of operation of the rotary drill, the bolts at the connection between the upper joint 110 and the outer shell 120 are prone to loosening. The loosening of the bolts will cause the distance between the connection between the upper joint 110 and the outer shell 120 to increase. If the upper joint 110 does not extend to the part inside the center hole 121, there is a risk that the upper shock-absorbing pad 102 will be clamped at the connection between the upper joint 110 and the outer shell 120. The upper joint 110 partially extends into the center hole 121 to effectively avoid this risk. Similarly, the lower end cover 130 partially extends into the center hole 121 to effectively avoid the risk of the lower shock-absorbing pad 103 being clamped at the connection between the lower end cover 130 and the outer shell 120.

[0042] In the embodiment of the utility model, the upper joint 110 is provided with a first plug hole 111 for inserting the first end of the guide rod 101, and the lower end cover 130 is provided with a second plug hole 131 for inserting the second end of the guide rod 101. Figures 3 to 5 As shown, the upper end of the guide rod 101 is inserted into the first insertion hole 111, and the lower end of the guide rod 101 is inserted into the second insertion hole 131. As can be seen from the above, there are multiple guide rods 101 and the multiple guide rods 101 are evenly spaced around the circumference, so there are multiple first insertion holes 111 corresponding to the guide rods 101, and there are multiple second insertion holes 131 corresponding to the guide rods 101. The guide rod 101 is limited only by inserting the two ends into the first insertion hole 111 and the second insertion hole 131 respectively, which facilitates the individual replacement of the guide rod 101, thereby reducing maintenance costs.

[0043] It is conceivable that the upper end of the guide rod 101 may be fixedly connected to the upper joint 110 , or the lower end of the guide rod 101 may be fixedly connected to the lower end cover 130 .

[0044] In the embodiment of the present utility model, the second insertion hole 131 is connected to a threaded hole 132, and a tightening bolt is installed in the threaded hole 132; the tightening bolt abuts against the second end of the guide rod 101 inserted in the second insertion hole 131. Figure 5As shown, the threaded hole 132 is concentrically arranged with the second insertion hole 131, so that the tightening bolt is pressed against the lower end of the guide rod 101, so that the upper end of the guide rod 101 is pressed against the upper joint 110, thereby preventing the guide rod 101 from moving in the vertical direction.

[0045] The rotary drill according to the second embodiment of the utility model comprises a rotary power head, a drill rod and the above-mentioned shock absorber, and the rotary power head and the drill rod are connected through the shock absorber. The rotary drill of the utility model embodiment comprises the above-mentioned shock absorber, and thus has at least all the beneficial effects of the shock absorber, which will not be described in detail here.

[0046] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "example", "specific example", or "some examples" etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in any one or more embodiments or examples in a suitable manner. In addition, those skilled in the art may combine and combine different embodiments or examples described in this specification.

[0047] The embodiments of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A shock absorber, characterized in that: include: The joint assembly defines a receiving space, wherein a plurality of guide rods are installed in the receiving space, and the plurality of guide rods are arranged at intervals around a circumference; The upper shock-absorbing pad and the lower shock-absorbing pad are both installed in the accommodation space and are both slidably sleeved on the guide rod; The lower joint has a connecting ring at the first end in the length direction and is used to connect a roller drill rod at the second end in the length direction; the connecting ring is arranged between the upper shock-absorbing pad and the lower shock-absorbing pad, and the connecting ring is provided with a guide hole for the guide rod to pass through, and the connecting ring can be lifted and lowered relative to the guide rod.

2. The shock absorber according to claim 1, characterized in that: The joint assembly comprises an upper joint, a shell and a lower end cover, wherein the upper joint and the lower end cover are respectively connected to two ends of the shell, and two ends of the guide rod are respectively installed on the upper joint and the lower end cover.

3. The shock absorber according to claim 2, characterized in that: The shell is provided with a central hole which axially passes through the shell, the upper joint portion extends into the central hole, and / or the lower end cover portion extends into the central hole.

4. The shock absorber according to claim 2, characterized in that: The upper joint is provided with a first plug hole for inserting the first end of the guide rod, and the lower end cover is provided with a second plug hole for inserting the second end of the guide rod.

5. The shock absorber according to claim 4, characterized in that: The second insertion hole is connected to a threaded hole, and a clamping bolt is installed in the threaded hole; the clamping bolt abuts against the second end of the guide rod inserted in the second insertion hole.

6. The shock absorber according to claim 5, characterized in that: The threaded hole is arranged concentrically with the second insertion hole.

7. The shock absorber according to claim 1, characterized in that: The thickness of the upper shock-absorbing pad is not less than the thickness of the lower shock-absorbing pad.

8. The shock absorber according to claim 1, characterized in that: A guide tube is installed in the guide hole, and the guide rod passes through the guide tube.

9. The shock absorber according to claim 8, characterized in that: The guide tube is made of non-metal material.

10. A rotary drill, characterized in that: The invention comprises a rotary power head, a drill rod and a shock absorber as claimed in any one of claims 1 to 9, wherein the rotary power head is connected to the drill rod via the shock absorber.

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