Detachable drill rod

Abstract

The utility model discloses a detachable drill rod which comprises a drill rod head, a locking device, an outer sleeve, a drill rod sleeve, an inner sleeve and a front cylinder body. The drill rod head is detachably locked and fixed to one end of the drill rod sleeve through a locking device, the other end of the drill rod sleeve is inserted into the front cylinder body, the outer sleeve is arranged between the drill rod sleeve and the front cylinder body and is close to the drill rod head, the inner sleeve is arranged between the drill rod sleeve and the front cylinder body, and the inner sleeve is arranged between the drill rod sleeve and the front cylinder body. And the drill rod is far away from the drill rod head. The detachable drill rod can be detached and replaced through the locking device, when the drill rod head is damaged, only the drill rod head needs to be replaced, the whole drill rod does not need to be replaced, and therefore the use cost can be greatly reduced, the detachable drill rod and a common drill rod can be compatible and can be used on the same hydraulic breaking hammer, and when the drill rod head is abraded and blunt, the drill rod head can be replaced conveniently. The drill rod head can be replaced in time, the crushing efficiency is guaranteed, the use cost of the drill rod can be obviously reduced, and the locking effect is very good.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic breaker hammers, in particular to a detachable drill rod. Background Art

[0002] The drill rod is a consumable part of a hydraulic breaker. Located at the bottom of the hydraulic breaker, it directly contacts the object being broken and can transfer the impact energy of the piston to the object being broken. Since the force-bearing area of the drill rod head is small, the pressure generated is large, which can achieve a good crushing effect. At the same time, the lower end of the drill rod is also subject to high pressure and easily rubs against the object being broken, causing the lower end of the drill rod to shorten and become blunt, which will affect the crushing effect of the hydraulic breaker. When the drill rod is consumed to a certain extent, it should be replaced with a new drill rod in time to ensure the continued stable operation of the hydraulic breaker.

[0003] The existing drill rod has the following disadvantages:

[0004] 1. The existing drill rod is made of iron as a whole, which is heavy in weight and volume, and has a high cost. Frequent replacement of the drill rod will cause great economic losses to the manufacturer.

[0005] 2. The existing drill rod and the front cylinder body may collide directly and be damaged.

[0006] 3. The existing drill rod and the front cylinder body have poor locking effect, and are easily loosened by impact during use.

[0007] 4. The existing drill rod is difficult to disassemble and replace, which greatly reduces the efficiency of crushing.

[0008] 5. There are many existing drill rod sizes and models that cannot be used together. Utility Model Content

[0009] The purpose of the utility model is to provide a detachable drill rod, which can be disassembled and replaced by a locking device. When the drill rod head is damaged, only the drill rod head needs to be replaced without replacing the entire drill rod, thereby greatly reducing the cost of use. The detachable drill rod and the ordinary drill rod are also compatible and can be used on the same hydraulic breaker hammer. When the drill rod head is worn and becomes blunt, the drill rod head can be replaced in time to ensure the crushing efficiency and significantly reduce the cost of use of the drill rod. The locking effect is very good, which solves the problem of loosening due to impact force during use.

[0010] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a detachable drill rod, comprising a drill rod head, a locking device, an outer sleeve, a drill rod sleeve, an inner sleeve, and a front cylinder body; the drill rod head is provided with a tail portion at one end close to the drill rod sleeve, and the tail portion is detachably locked and fixed to one end of the drill rod sleeve through the locking device, and the other end of the drill rod sleeve is inserted into the front cylinder body, the outer sleeve is arranged between the drill rod sleeve and the front cylinder body and is arranged close to the drill rod head, the inner sleeve is arranged between the drill rod sleeve and the front cylinder body and is arranged away from the drill rod head, and the drill rod head is provided with a tail portion at one end close to the drill rod sleeve.

[0011] Further preferably, the locking device includes a locking screw, a pin with a slot in the middle, a pin slot, a pin hole, and a threaded hole arranged on the tail of the drill rod head, the pin hole and the threaded hole are opened on one end of the drill rod sleeve, and the threaded hole is arranged perpendicular to the central axis of the drill rod sleeve, and the pin hole is arranged parallel to the central axis of the drill rod sleeve, the pin is inserted into the pin hole and passes through the pin slot, the locking screw is inserted into the threaded hole, and the bottom surface of the locking screw abuts against the slot in the middle of the pin.

[0012] Further preferably, the tail portion is inserted into one end of the drill rod sleeve.

[0013] Further preferably, it also includes a short tail portion with a diameter smaller than the tail portion of the drill rod head, and the locking device includes a locking screw, a pin with a slot in the middle, a pin groove, a pin hole, and a threaded hole provided on the short tail portion. The pin hole and the threaded hole are opened on one end of the drill rod sleeve, and the threaded hole is arranged perpendicular to the central axis of the drill rod sleeve, and the pin hole is arranged parallel to the central axis of the drill rod sleeve. The short tail portion is connected to or integrally formed with the tail portion of the drill rod head, the pin is inserted into the pin hole, the locking screw is inserted into the threaded hole, and the bottom surface of the locking screw is against the groove in the middle of the pin.

[0014] Further preferably, the short tail is inserted into one end of the drill rod sleeve.

[0015] Further preferably, the contact surface of the tail portion of the drill rod head does not contact the inner bottom surface of the drill rod sleeve.

[0016] Further preferably, it also includes a long tail portion with a diameter larger than the tail portion of the drill rod head, and the locking device includes a pressure plate screw and a pressure plate. The long tail portion is connected to or integrally formed with the tail portion of the drill rod head, and the long tail portion is inserted into one end of the drill rod sleeve. The pressure plate is sleeved on the outside of the tail portion of the drill rod head, and the pressure plate is fixedly connected to the end surface of one end of the drill rod sleeve by a pressure plate screw.

[0017] Further preferably, the inner diameter of the pressing plate is the same as the diameter of the tail end of the drill rod head.

[0018] Further preferably, the number of the locking devices is one or more.

[0019] Further preferably, when there are multiple locking devices, they are evenly distributed along the central axis of the drill rod sleeve.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. The drill rod head of the utility model can directly contact the object to be crushed and can be disassembled and replaced through a locking device. In addition, an inner sleeve and an outer sleeve are provided between the drill rod sleeve and the front cylinder body, which can fix the drill rod sleeve and the front cylinder body on the one hand and protect the drill rod sleeve and the front cylinder body on the other hand to avoid direct collision and damage between the drill rod sleeve and the front cylinder body when crushing objects.

[0022] 2. The traditional drill rod is made of iron as a whole, which is heavy and bulky, and the cost is high. Frequent replacement of the drill rod will cause great economic losses to the manufacturer. The utility model improves the traditional drill rod structure into a detachable drill rod head and drill rod sleeve structure. When the drill rod head is damaged, only the drill rod head needs to be replaced, and there is no need to replace the entire drill rod, thus greatly reducing the cost of use.

[0023] 3. The design of the utility model is compatible with both detachable drill rods and ordinary drill rods, and both can be used on the same type of hydraulic breaker. When the drill rod head is worn and becomes blunt, the drill rod head can be replaced in time to ensure the crushing efficiency and significantly reduce the cost of using the drill rod.

[0024] 4. In order to prevent the pin from vibrating out of the pin slot due to vibration, the locking device in Examples 2-3 of the present invention has a threaded hole on the drill rod sleeve. When the screw is tightened in the screw hole, the bottom surface of the screw will press against the slot in the middle of the pin, thereby preventing the pin from being disengaged from the pin hole and the pin slot due to vibration, thereby solving the problem of being easily loosened due to impact force during use.

[0025] 5. The locking device in Examples 2-3 of the present invention has a vertical pin and a vertical screw. When the pin needs to be replaced, the screw needs to be screwed outward a certain distance first so that the bottom of the screw is away. In this way, the pin can be removed, and then the drill rod head can be removed and replaced with a new one. This design has a very good fastening effect and will not loosen due to impact force during use. It is very convenient to use and greatly improves the replacement efficiency.

[0026] 6. The locking device in Example 4 of the present invention has a diameter of the long tail portion that is larger than the diameter of the tail portion of the drill rod head, which results in a step between the long tail portion and the tail portion of the drill rod head. The inner diameter of the pressure plate is smaller than the diameter of the long tail portion, so that the long tail portion can be firmly clamped, thereby clamping the drill rod head inside the drill rod sleeve to play a fixing role. When disassembly is required, unscrew the pressure plate screw, remove the pressure plate, and replace the drill rod head. This design has a very good fastening effect and will not loosen due to impact force during use. It is very convenient to use and the replacement efficiency is greatly improved.

[0027] 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 learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a structural diagram of the utility model;

[0029] Figure 2 This is a schematic diagram of the internal structure of Example 2 of the present utility model;

[0030] Figure 3 This is a schematic structural diagram of a drill rod head according to Example 2 of the present utility model;

[0031] Figure 4 This is a schematic structural diagram of the locking device of Example 2 of the present utility model;

[0032] Figure 5 This is a structural diagram of a drill rod sleeve according to Example 2 of the present utility model;

[0033] Figure 6 for Figure 5 Middle AA section view;

[0034] Figure 7 for Figure 6 Schematic diagram of the structure in which the locking screw and the pin are inserted;

[0035] Figure 8 This is a schematic diagram of the pin structure of the present utility model;

[0036] Figure 9 This is a schematic diagram of the internal structure of Example 3 of the present utility model;

[0037] Figure 10 This is a schematic diagram of the connection between the drill rod head and the drill rod sleeve in Example 3 of the present utility model;

[0038] Figure 11 This is a schematic structural diagram of a drill rod head according to Example 3 of the present utility model;

[0039] Figure 12 This is a schematic structural diagram of the locking device of Example 3 of the present utility model;

[0040] Figure 13 This is a schematic diagram of the internal structure of Example 4 of the present utility model;

[0041] Figure 14 This is a structural diagram of a drill rod head according to Example 4 of the present utility model;

[0042] Figure 15 This is a schematic structural diagram of the locking device of Example 4 of the present utility model;

[0043] Figure 16 This is a structural diagram of a drill rod sleeve according to Example 4 of the present utility model;

[0044] Figure 17 This is a schematic structural diagram of the pressure plate of Example 4 of the present utility model.

[0045] Among them, 1. Drill rod head; 3. Threaded hole; 4. Contact surface; 5. Outer sleeve; 6. Drill rod sleeve; 7. Inner sleeve; 8. Front cylinder body; 9. Pin hole; 111. Short tail; 112. Long tail; 113. Pin groove; 211. Locking screw; 212. Pin; 221. Pressure plate screw; 222. Pressure plate. DETAILED DESCRIPTION

[0046] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0047] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integral connection; mechanical connection or electrical connection; direct connection or indirect connection through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0048] Example 1

[0049] In order to solve the above problems, the present invention provides a technical solution: Figure 1-2A detachable drill rod comprises a drill rod head 1, a locking device, an outer sleeve 5, a drill rod sleeve 6, an inner sleeve 7, and a front cylinder body 8; the drill rod head 1 is provided with a tail at one end close to the drill rod sleeve 6, and the tail is detachably locked and fixed to one end of the drill rod sleeve 6 through a locking device, and the other end of the drill rod sleeve 6 is inserted into the front cylinder body 8, the outer sleeve 5 is arranged between the drill rod sleeve 6 and the front cylinder body 8, and is arranged close to the drill rod head 1, and the inner sleeve 7 is arranged between the drill rod sleeve 6 and the front cylinder body 8, and is arranged away from the drill rod head 1.

[0050] The drill rod head 1 in the present invention can directly contact the object to be crushed and can be disassembled and replaced by a locking device. In addition, an inner sleeve 7 and an outer sleeve 5 are provided between the drill rod sleeve 6 and the front cylinder body 8. On the one hand, the drill rod sleeve 6 and the front cylinder body 8 can be fixed. On the other hand, both the drill rod sleeve 6 and the front cylinder body 8 can be protected to avoid direct collision and damage between the drill rod sleeve 6 and the front cylinder body 8 when the object is crushed.

[0051] Example 2

[0052] like Figure 2-8 As shown, the difference between this embodiment and embodiment 1 is that the locking device includes a locking screw 211, a pin 212 with a slot in the middle, a pin slot, a pin hole 9, and a threaded hole 3. The pin slot is provided on the tail of the drill rod head 1, the pin hole 9 and the threaded hole 3 are provided on one end of the drill rod sleeve 6, and the threaded hole 3 is provided perpendicular to the central axis of the drill rod sleeve 6, the pin hole 9 is provided parallel to the central axis of the drill rod sleeve 6, the tail is inserted into one end of the drill rod sleeve 6, the pin 212 is inserted into the pin hole 9 and passes through the pin slot, the locking screw 211 is inserted into the threaded hole 3, and the bottom surface of the locking screw 211 is against the slot in the middle of the pin 212.

[0053] When the drill rod head 1 and the drill rod sleeve 6 are combined, the pin 212 can be installed in the pin hole 9 and the pin groove from the side, so that the drill rod head 1 can be fixed in the drill rod sleeve 6. At this time, in order to prevent the pin 212 from vibrating out from the pin 212 grooves due to vibration, a threaded hole 3 is opened on the drill rod sleeve 6. When the screw is tightened into the screw hole, the bottom surface of the screw can resist the groove in the middle part of the pin 212, thereby preventing the pin 212 from vibrating out of the pin hole 9 and the pin groove. When it is necessary to replace the pin 212, it is necessary to first screw the screw outwards a certain distance so that the bottom of the screw leaves. Then, the pin 212 can be removed, and the drill rod head 1 can be removed afterwards. The new drill rod head 1 is replaced, which is very convenient to use.

[0054] Example 3

[0055] like Figure 9-12As shown, the difference between this embodiment and Example 1 is that it also includes a short tail portion 111 with a diameter smaller than that of the tail of the drill rod head 1, and the locking device includes a locking screw 211, a pin 212 with a slot in the middle, a pin slot 113, a pin hole 9, and a threaded hole 3. The pin slot 113 is provided on the short tail portion 111, the pin hole 9 and the threaded hole 3 are provided on one end of the drill rod sleeve 6, and the threaded hole 3 is provided perpendicular to the central axis of the drill rod sleeve 6, and the pin hole 9 is provided parallel to the central axis of the drill rod sleeve 6. The short tail portion 111 is connected to or integrally formed with the tail of the drill rod head 1, the short tail portion 111 is inserted into one end of the drill rod sleeve 6, the pin 212 is inserted into the pin hole 9, the locking screw 211 is inserted into the threaded hole 3, and the bottom surface of the locking screw 211 is against the groove in the middle of the pin 212, and the contact surface 4 at the tail of the drill rod head 1 does not contact the inner bottom surface of the drill rod sleeve 6.

[0056] The main difference between this embodiment and embodiment 2 is that:

[0057] 1) Whether the contact surface 4 at the rear end of the drill rod head 1 is in contact with the inner bottom surface of the drill rod sleeve 6. In Example 2, the contact surface 4 at the rear end of the drill rod head 1 is in contact with the inner bottom surface of the drill rod sleeve 6 and is inside the drill rod sleeve 6; in this embodiment, the contact surface 4 at the rear end of the drill rod head 1 is not in contact with the inner bottom surface of the drill rod sleeve 6.

[0058] 2) This embodiment adopts a short tail portion 111 having a diameter smaller than that of the tail portion of the drill rod head 1, and the short tail portion 111 is connected to or integrally formed with the tail portion of the drill rod head 1; when the short tail portion 111 and the tail portion of the drill rod head 1 are connected, the connection method can be other firm detachable connection methods such as threads and snaps. When the drill rod head 1 is damaged, the drill rod head 1 can be directly removed from the short tail portion 111; when the short tail portion 111 and the tail portion of the drill rod head 1 are integrally formed, when the drill rod head 1 is damaged, it can be removed and replaced through a locking device, and its removal and replacement method refers to Example 2.

[0059] Such a structure makes the detachable drill rod compatible with ordinary drill rods (ordinary drill rods with suitable diameters can be directly provided with a pin groove to be inserted into the drill rod sleeve 6 and locked for use, refer to Example 2; those with unsuitable diameters can be used after being connected with the short tail 111 or the long tail 112, refer to Examples 3-4). Both can be used on the same type of hydraulic breaker. When the drill rod head 1 is worn and becomes blunt, the drill rod head 1 can be replaced in time to ensure the crushing efficiency and significantly reduce the cost of using the drill rod.

[0060] Example 4

[0061] like Figure 13-17As shown, the difference between this embodiment and embodiment 1 is that: it also includes a long tail portion 112 with a diameter larger than the tail of the drill rod head 1, and the locking device includes a pressure plate screw 221 and a pressure plate 222. The long tail portion 112 is connected to the tail of the drill rod head 1 or is integrally formed with the long tail portion 112, and the long tail portion 112 is inserted into one end of the drill rod sleeve 6. The pressure plate 222 is sleeved on the outside of the tail of the drill rod head 1, and the pressure plate 222 is fixedly connected to the end surface of one end of the drill rod sleeve 6 by the pressure plate screw 221; the inner diameter of the pressure plate 222 is the same as the diameter of the tail of the drill rod head 1.

[0062] In this embodiment, the contact surface 4 at the rear end of the drill tool head 1 does not contact the inner bottom surface of the drill tool sleeve 6. The extended tail portion 112 is connected to or integrally formed with the rear end of the drill tool head 1. When the extended tail portion 112 is connected to the rear end of the drill tool head 1, the connection method may be a threaded connection, a snap-fit connection, or other secure, detachable connection method. If the drill tool head 1 is damaged, the drill tool head 1 can be directly removed from the extended tail portion 112. If the extended tail portion 112 is integrally formed with the rear end of the drill tool head 1, the drill tool head 1 can be removed and replaced using a locking device. The removal and replacement method is similar to that of Example 2.

[0063] In addition, in this embodiment, the diameter of the long tail portion 112 is larger than the diameter of the tail of the drill rod head 1, which results in a step between the long tail portion 112 and the tail of the drill rod head 1. During installation, the drill rod head 1 and the drill rod sleeve 6 are first connected, that is, the long tail portion 112 is inserted into one end of the drill rod sleeve 6, and then the pressure plate 222 is pressed on and the pressure plate screw 221 is tightened. The inner diameter of the pressure plate 222 is the same as the diameter of the tail of the drill rod head 1, that is, the inner diameter of the pressure plate 222 is smaller than the diameter of the long tail portion 112, so that the long tail portion 112 can be firmly clamped, so that the drill rod head 1 can be clamped inside the drill rod sleeve 6 to play a fixing role. When disassembly is required, unscrew the pressure plate screw 221, remove the pressure plate 222, and replace the drill rod head 1.

[0064] Example 5

[0065] The difference between this embodiment and embodiment 1 is that the number of locking devices is one or more.

[0066] Example 6

[0067] The difference between this embodiment and embodiment 5 is that when there are multiple locking devices, they are evenly distributed along the central axis of the drill rod sleeve 6. Figure 2-12 As shown, there are two locking devices.

[0068] In the description of the present invention, it should be understood that the indicated orientations or positional relationships are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the present invention.

[0069] Throughout this specification, reference to terms such as "one embodiment," "some embodiments," "examples," "specific examples," or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0070] Although the embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A detachable drill rod, characterized in that: It includes a drill rod head, a locking device, an outer sleeve, a drill rod sleeve, an inner sleeve, and a front cylinder body; the drill rod head is provided with a tail portion at one end close to the drill rod sleeve, and the tail portion is detachably locked and fixed to one end of the drill rod sleeve through the locking device; the other end of the drill rod sleeve is inserted into the front cylinder body; the outer sleeve is arranged between the drill rod sleeve and the front cylinder body and is arranged close to the drill rod head; the inner sleeve is arranged between the drill rod sleeve and the front cylinder body and is arranged away from the drill rod head.

2. The detachable drill rod according to claim 1, characterized in that: The locking device includes a locking screw, a pin with a slot in the middle, a pin slot, a pin hole, and a threaded hole arranged on the tail of the drill rod head. The pin hole and the threaded hole are opened on one end of the drill rod sleeve, and the threaded hole is arranged perpendicular to the central axis of the drill rod sleeve, and the pin hole is arranged parallel to the central axis of the drill rod sleeve. The pin is inserted into the pin hole and passes through the pin slot. The locking screw is inserted into the threaded hole, and the bottom surface of the locking screw abuts against the slot in the middle of the pin.

3. The detachable drill rod according to claim 2, characterized in that: The tail portion is inserted into one end of the drill rod sleeve.

4. The detachable drill rod according to claim 1, characterized in that: It also includes a short tail portion with a diameter smaller than that of the tail portion of the drill rod head, and the locking device includes a locking screw, a pin with a slot in the middle, a pin groove, a pin hole, and a threaded hole provided on the short tail portion. The pin hole and the threaded hole are opened on one end of the drill rod sleeve, and the threaded hole is arranged perpendicular to the central axis of the drill rod sleeve, and the pin hole is arranged parallel to the central axis of the drill rod sleeve. The short tail portion is connected to or integrally formed with the tail portion of the drill rod head, the pin is inserted into the pin hole, the locking screw is inserted into the threaded hole, and the bottom surface of the locking screw is against the groove in the middle of the pin.

5. The detachable drill rod according to claim 4, characterized in that: The short tail portion is inserted into one end of the drill rod sleeve.

6. The detachable drill rod according to claim 4, characterized in that: The contact surface of the tail of the drill rod head does not contact the inner bottom surface of the drill rod sleeve.

7. The detachable drill rod according to claim 1, characterized in that: It also includes a long tail portion with a diameter larger than the tail portion of the drill rod head, and the locking device includes a pressure plate screw and a pressure plate. The long tail portion is connected to or integrally formed with the tail portion of the drill rod head, and the long tail portion is inserted into one end of the drill rod sleeve. The pressure plate is sleeved on the outside of the tail portion of the drill rod head, and the pressure plate is fixedly connected to the end surface of one end of the drill rod sleeve by a pressure plate screw.

8. The detachable drill rod according to claim 7, characterized in that: The inner diameter of the pressing plate is the same as the diameter of the tail end of the drill rod head.

9. The detachable drill rod according to claim 1, characterized in that: The number of the locking devices is one or more.

10. The detachable drill rod according to claim 9, characterized in that: When there are multiple locking devices, they are evenly distributed along the central axis of the drill rod sleeve.

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