Bit shank sleeve and anchor rod drilling device

Abstract

The utility model discloses a bit shank sleeve and an anchor rod drilling device, the bit shank sleeve comprises a sleeve body, one end of the sleeve body is internally provided with a first internal connection threaded hole section and a tool withdrawal groove located on the inner side of the first internal connection threaded hole section, the other end of the sleeve body is internally provided with a second internal connection threaded hole section, and the second internal connection threaded hole section is a straight internal connection threaded hole section; the inner side end of the second inner connecting threaded hole section is communicated with the tool withdrawal groove, the outer side end of the second inner connecting threaded hole section straightly penetrates through the end portion of the other end of the sleeve body, the inner diameter of the first inner connecting threaded hole section is larger than that of the second inner connecting threaded hole section, and the first inner connecting threaded hole section and the second inner connecting threaded hole section are the same in rotating direction. The first internal connection threaded hole section is used for connecting an anchor rod, and the second internal connection threaded hole section is used for connecting a shank of a rock drill; the cushion block is installed in the tool withdrawal groove through the first inner connection threaded hole section of the sleeve body, and a first installation gap is formed between the cushion block and the end portion of the inner side of the second inner connection threaded hole section.

Description

TECHNICAL FIELD

[0001] The utility model relates to civil engineering equipment technical field, specifically relates to a drill collar and anchor rod drilling device. BACKGROUND

[0002] At present, anchor rod drilling device needs to be used in anchoring construction, the anchor rod drilling device is composed of anchor rod, rock drill and connecting sleeve, adopts the way of drilling every root to construct, needs to remove the connection between anchor rod and rock drill after drilling every root anchor rod to install and drill next anchor rod until drilling to the predetermined depth. In the construction process, the rock drill and the anchor rod are fixedly connected through the drill collar, when the anchor rod needs to be disassembled, the next anchor rod is installed, the anchor rod is clamped and fixed by means of hydraulic clamp, the reverse rotation of the drill tail of the rock drill is controlled to realize the disconnection with the anchor rod, so that the disassembly is realized.

[0003] The drill tail of the existing rock drill is generally a variable-diameter shaft body structure with a thin end and a thick root, in order to adapt to the drill tail connection of the rock drill, the end connected with the variable-diameter shaft body structure of the drill tail sleeve has a variable-diameter hole section matched with the variable-diameter shaft body structure. In the actual drilling process, the variable-diameter shaft body structure of the drill tail is more and more tightly screwed with the variable-diameter hole section of the drill tail sleeve, when disassembling, the drill tail of the rock drill and the drill tail sleeve often appear locked and screwed, so that the drill tail of the rock drill cannot be disconnected with the drill tail sleeve.

[0004] Therefore, the utility model patent is proposed. UTILITY MODEL CONTENT

[0005] In order to solve the above technical problems, the utility model provides a drill collar and anchor rod drilling device, which can solve the problem that the drill tail of the rock drill and the drill tail sleeve are locked and screwed and cannot be disconnected when the anchor rod is drilled and the drill tail sleeve is disassembled. Specifically, the following technical scheme is adopted:

[0006] A drill collar, comprising:

[0007] A sleeve body, one end of the sleeve body has a first inner connecting threaded hole section and a tool withdrawal groove inside, the other end of the sleeve body has a second inner connecting threaded hole section inside, the second inner connecting threaded hole section is a flat inner connecting threaded hole section, the inner side end of the second inner connecting threaded hole section communicates with the tool withdrawal groove, the outer side end of the second inner connecting threaded hole section is flat and penetrates the end of the other end of the sleeve body, the inner diameter of the tool withdrawal groove is greater than the inner diameter of the first inner connecting threaded hole section, the inner diameter of the first inner connecting threaded hole section is greater than the inner diameter of the second inner connecting threaded hole section, the rotation directions of the first inner connecting threaded hole section and the second inner connecting threaded hole section are the same, the first inner connecting threaded hole section is used for connecting the anchor rod, and the second inner connecting threaded hole section is used for connecting the drill tail of the rock drill;

[0008] The spacer is installed in the tool withdrawal groove by the first inner connecting threaded hole section of the sleeve body, and has a first installation gap between the inner side end of the second inner connecting threaded hole section.

[0009] As an optional embodiment of the utility model, the axial width of the tool withdrawal groove is greater than the axial thickness of the spacer, the spacer is installed in the tool withdrawal groove by the first inner connecting threaded hole section of the sleeve body, and has a first installation gap between the inner side end of the first inner connecting threaded hole section.

[0010] As an optional embodiment of the utility model, the outer periphery of the spacer has an outer connecting thread, the outer connecting thread of the spacer is matched with the first inner connecting threaded hole section, the spacer is screwed by the first inner connecting threaded hole section until the first inner connecting threaded hole section is separated, and the spacer is retracted into the tool withdrawal groove.

[0011] As an optional embodiment of the utility model, the second installation gap is between the inner side end of the first inner connecting threaded hole section and the spacer in the tool withdrawal groove.

[0012] The utility model discloses simultaneously provides a kind of anchor rod drilling device with the tool holder, comprising:

[0013] Rock drill, including rock drill host and the tool holder connected with rock drill host, the tool holder is connected with the second inner connecting threaded hole section of tool holder set screw thread;

[0014] Anchor rod, with the first inner connecting threaded hole section of tool holder set screw thread is connected;

[0015] The end of the tool holder of the rock drill, anchor rod respectively with the spacer of the tool holder abuts.

[0016] As an optional embodiment of the utility model, a kind of anchor rod drilling device of the utility model, the tool holder of the rock drill includes integrally formed outer thread connecting section, transition connecting section and tool holder base section, the tool holder base section is connected with rock drill host, the outer diameter of the outer thread connecting section is less than the outer diameter of the tool holder base section, the transition connecting section connects the outer thread connecting section, tool holder base section;

[0017] The outer thread connecting section of the tool holder is connected with the second inner connecting threaded hole section of tool holder set screw thread, and the transition connecting section is located outside the second inner connecting threaded hole section of tool holder.

[0018] As optional implementation of the utility model, the utility model discloses a kind of anchor rod drilling device, the transition connecting section includes cylindrical shaft section and circular table-like shaft section, cylindrical shaft section is integrally connected with outer thread connecting section, the large diameter end of circular table-like shaft section is integrally connected with shank base section, the small diameter end of circular table-like shaft section is integrally connected with cylindrical shaft section.

[0019] The outer thread connecting section of the shank is threadedly connected with the second inner connecting threaded hole section of the shank sleeve, at least part of the cylindrical shaft section extends into the inside of the second inner connecting threaded hole section, and the circular table-like shaft section is located outside the second inner connecting threaded hole section of the shank sleeve.

[0020] As optional implementation of the utility model, the utility model discloses a kind of anchor rod drilling device, the outer diameter of the cylindrical shaft section is less than the outer diameter of the outer thread connecting section.

[0021] As optional implementation of the utility model, the utility model discloses a kind of anchor rod drilling device, the large diameter end outer diameter of the circular table-like shaft section is greater than the outer diameter of the outer thread connecting section.

[0022] Compared with prior art, the utility model has the beneficial effects that:

[0023] The shank sleeve of the utility model is used for connecting the second inner connecting threaded hole section of the shank of rock drill, the outside end of the second inner connecting threaded hole section is straight and penetrates the end of the other end of the sleeve body, so that the second inner connecting threaded hole section is connected with only the section of the shank having connecting thread, and a variable-diameter hole section is no longer arranged to cooperate with the variable-diameter shaft body structure of the shank, so that the variable-diameter shaft body structure of the shank and the variable-diameter hole section of the shank sleeve are prevented from being more and more tightly screwed during drilling, to avoid the phenomenon that the shank of the rock drill and the shank sleeve are tightly screwed and locked and cannot be separated.

[0024] The shank sleeve of the utility model is provided with a pad block inside:

[0025] 1, the shank of the rock drill directly contacts the pad block, the pad block contacts the end surface of the anchor rod, so that the impact force of the rock drill is directly transmitted through the end surface, instead of being transmitted through thread connection, to avoid deformation of the thread.

[0026] 2, because the pad block has a first installation gap d between the inside end of the second inner connecting threaded hole section, when the anchor rod needs to be disassembled, the shank of the rock drill is reversed, and the shank of the rock drill is more easily separated.

[0027] In addition, the shank sleeve of the utility model, the first inner connecting threaded hole section and the second inner connecting threaded hole section are communicated through a tool withdrawal groove. In this way, the first inner connecting threaded hole section and the second inner connecting threaded hole section realize a through channel, slurry can be injected through the through channel during drilling, a grouting hole is arranged on the outer wall of the anchor rod, drilling and grouting are realized simultaneously during the drilling process of the anchor rod, and the drilling effect is greatly improved. BRIEF DESCRIPTION OF DRAWINGS

[0028] Figure 1 The structural schematic diagram of the anchor rod drilling device in the embodiment of the present application is shown in the figure.

[0029] Figure 2 The present application Figure 1 The local enlarged view of the middle A position.

[0030] Figure 3 The three-dimensional structural schematic diagram of the shank sleeve in the embodiment of the present application (one implementation manner) is shown in the figure. DETAILED DESCRIPTION

[0031] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in combination with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments.

[0032] Therefore, the following detailed description of the embodiments of the present application is not intended to limit the scope of the claimed present application, but only represents some embodiments of the present application. All other embodiments obtained by those skilled in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0033] It should be noted that the embodiments in the present application and the features and technical schemes in the embodiments can be combined with each other without conflict.

[0034] It should be noted that: similar labels and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0035] In the description of the present application, it should be noted that the orientation or position relationship indicated by the terms "upper", "lower" and the like is based on the orientation or position relationship shown in the drawings, or the orientation or position relationship commonly placed when the product of the present application is used, or the orientation or position relationship commonly understood by those skilled in the art. Such terms are only for the convenience of describing the present application and simplifying the description, and are not intended to indicate or imply that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the present application. In addition, the terms "first", "second" and the like are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0036] Referring to Figures 1-2 The shank sleeve of the present embodiment includes:

[0037] The sleeve body 101 has a first inner connecting threaded hole section 102 and a tool withdrawal groove 103 inside one end of the sleeve body 101, and has a second inner connecting threaded hole section 104 inside the other end of the sleeve body 101, the second inner connecting threaded hole section 104 is a flat inner connecting threaded hole section, the inner side end of the second inner connecting threaded hole section 104 is communicated with the tool withdrawal groove 103, and the outer side end of the second inner connecting threaded hole section 104 is flat through the end of the other end of the sleeve body 101, the inner diameter of the tool withdrawal groove 103 is larger than the inner diameter of the first inner connecting threaded hole section 102, the inner diameter of the first inner connecting threaded hole section 102 is larger than the inner diameter of the second inner connecting threaded hole section 104, the first inner connecting threaded hole section 102 and the second inner connecting threaded hole section 104 have the same rotation direction, the first inner connecting threaded hole section 102 is used for connecting the anchor rod 200, and the second inner connecting threaded hole section 104 is used for connecting the drill bit 301 of the rock drill 300.

[0038] The spacer 105 is arranged in the tool withdrawal groove 103 of the first inner connecting threaded hole section 102 of the sleeve body 101, and has a first installation gap d between the inner side end of the second inner connecting threaded hole section 104.

[0039] The drill bit sleeve is used for the second inner connecting threaded hole section 104 of the drill bit 301 of the rock drill 300, and the outer side end of the second inner connecting threaded hole section 104 is flat through the end of the other end of the sleeve body 101, so that the second inner connecting threaded hole section 104 is only connected with a threaded section of the drill bit 301, and a variable-diameter hole section is no longer arranged to match the variable-diameter shaft body structure of the drill bit, so that the variable-diameter shaft body structure of the drill bit is prevented from being more tightly rotated with the variable-diameter hole section of the drill bit sleeve in the drilling process, and the drill bit of the rock drill and the drill bit sleeve are prevented from being locked and unable to be separated.

[0040] The spacer 105 is arranged in the drill bit sleeve:

[0041] 1. The drill bit 301 of the rock drill 300 directly contacts the spacer 105, and the spacer 105 contacts the end surface of the anchor rod 200, so that the impact force of the rock drill 300 is directly transmitted through the end surface, instead of being transmitted through threaded connection, and deformation of the thread is avoided.

[0042] 2. Because the spacer 105 has the first installation gap d between the inner side end of the second inner connecting threaded hole section 104, when the anchor rod needs to be disassembled, the drill bit 301 of the rock drill 300 is reversed to be separated first, the axial locking force of the spacer 105 disappears, and the anchor rod 200 is more easily separated from the drill bit sleeve.

[0043] In addition, the first inner connecting threaded hole section 102 and the second inner connecting threaded hole section 104 are communicated through the relief groove 103. In this way, the first inner connecting threaded hole section 102 and the second inner connecting threaded hole section 104 realize a through channel, and slurry can be injected through the through channel during drilling, and a grouting hole is formed on the outer wall of the anchor rod, so that grouting is realized during drilling, which greatly improves the drilling effect.

[0044] Specifically, the axial width D of the relief groove 103 is greater than the axial thickness of the pad 105, and the pad 105 is installed in the relief groove 103 by the first inner connecting threaded hole section 102 of the sleeve body 101, and has a first installation gap d between the inner side end of the first inner connecting threaded hole section 102.

[0045] Specifically, the first installation gap d is in the range of 3-5 mm.

[0046] As an optional embodiment of the present embodiment, the pad 105 has an outer connecting thread on the outer periphery, the outer connecting thread of the pad 105 matches the first inner connecting threaded hole section 102, and the pad 105 is screwed by the first inner connecting threaded hole section 102 until it is separated from the first inner connecting threaded hole section 102 and retracts into the relief groove 103. During installation, the pad 105 is screwed with the first inner connecting threaded hole section 102 until it is separated from the thread, and is sleeved into the relief groove 103. At the same time, because the outer surface of the pad 105 is provided with an outer connecting thread, it is not easy to fall out of the drill collar.

[0047] As an optional embodiment of the present embodiment, the pad 105 has a second installation gap between the inner side end of the first inner connecting threaded hole section 102 in the relief groove 103. Because the pad 105 has a second installation gap between the inner side end of the first inner connecting threaded hole section 102, when the anchor rod 200 needs to be disassembled, the drilling machine is reversed, and the drill collar 301 is separated by a distance first. At this time, the axial locking force on the thread of the anchor rod 200 is greatly reduced, and the anchor rod 200 and the drill collar 100 will be separated with the reverse rotation of the rock drill.

[0048] Referring to Figure 3As shown, the easy-to-disassemble anchor rod drill bit tail sleeve of the embodiment comprises a sleeve body 101, the inner wall of one end of the sleeve body 101 is provided with a first inner connecting threaded hole section 102, the inner wall of the other end of the sleeve body 101 is provided with a second inner connecting threaded hole section 104, the first inner connecting threaded hole section 102 and the second inner connecting threaded hole section 104 are of the same rotation direction, the first inner connecting threaded hole section 102 is used for connecting an anchor rod, and the second inner connecting threaded hole section 104 is used for connecting the output end of a rock drill.

[0049] The easy-to-disassemble anchor rod drill bit tail sleeve of the embodiment cuts off part or the whole axial section of the first inner connecting threaded hole section 102 by providing the through groove 103 on the inner wall of the first inner connecting threaded hole section 102, so that the first inner connecting threaded hole section 102 is no longer continuous, the locking force of the first inner connecting threaded hole section 102 is reduced, and it is easier to separate the anchor rod from the drill bit tail sleeve when the anchor rod is disassembled.

[0050] Therefore, the easy-to-disassemble anchor rod drill bit tail sleeve of the embodiment is more convenient for disassembling the anchor rod when used for connecting the rock drill and the anchor rod, time is saved, and the efficiency of anchoring construction is greatly improved.

[0051] As an optional embodiment of the embodiment, the easy-to-disassemble anchor rod drill bit tail sleeve of the embodiment comprises a first through groove 103A provided on the inner wall of the first inner connecting threaded hole section 102, and the first through groove 103A cuts off the whole axial section of the first inner connecting threaded hole section 102.

[0052] The first through groove 103A of the embodiment cuts off the whole axial section of the first inner connecting threaded hole section 102, the locking force of the whole axial direction of the first inner connecting threaded hole section 102 is reduced, and it is easier to separate the anchor rod from the drill bit tail sleeve when the anchor rod is disassembled.

[0053] Further, the first through groove 103A of the embodiment is provided along the axial direction of the first inner connecting threaded hole section 102. It should be understood by those skilled in the art that the first through groove 103A of the embodiment can also be provided on the inner wall of the first inner connecting threaded hole section 102 in an inclined manner, as long as the whole axial section of the first inner connecting threaded hole section 102 can be cut off.

[0054] As an optional embodiment of the embodiment, the drill bit tail sleeve of the embodiment comprises a first through groove 103 provided on the inner wall of the first inner connecting threaded hole section 102, and the first through groove 103 cuts off part or the whole axial section of the first inner connecting threaded hole section 102.

[0055] The drill bit sleeve of the embodiment is characterized in that a through groove 103 is formed in the inner wall of the first inner connecting threaded hole section 102, and the through groove 103 cuts off part or all of the axial section of the first inner connecting threaded hole section 102, so that the first inner connecting threaded hole section 102 is no longer continuous, and the locking force of the first inner connecting threaded hole section 102 is reduced, and the anchor rod is more easily separated from the drill bit sleeve when the anchor rod is disassembled.

[0056] Therefore, the drill bit sleeve of the embodiment is more convenient for disassembling the anchor rod when used for connecting the rock drill and the anchor rod, time is saved, and the efficiency of anchoring construction is greatly improved.

[0057] As an optional embodiment of the embodiment, the drill bit sleeve of the embodiment is characterized in that the through groove 103 includes a first through groove formed in the inner wall of the first inner connecting threaded hole section 102, and the first through groove cuts off all of the axial section of the first inner connecting threaded hole section 102.

[0058] The first through groove of the embodiment cuts off all of the axial section of the first inner connecting threaded hole section 102, reduces the locking force of the first inner connecting threaded hole section 102 in the whole axial direction, and the anchor rod is more easily separated from the drill bit sleeve when the anchor rod is disassembled.

[0059] Further, the first through groove of the embodiment is formed in the axial direction of the first inner connecting threaded hole section 102. It should be understood by those skilled in the art that the first through groove of the embodiment can also be formed obliquely on the inner wall of the first inner connecting threaded hole section 102, as long as it can cut off all of the axial section of the first inner connecting threaded hole section 102.

[0060] As an optional embodiment of the embodiment, the drill bit sleeve of the embodiment is characterized in that the through groove 103 includes a second through groove formed in the inner wall of the first inner connecting threaded hole section 102, and the second through groove cuts off part of the axial section of the first inner connecting threaded hole section 102.

[0061] The second through groove of the embodiment cuts off part of the axial section of the first inner connecting threaded hole section 102, reduces the locking force of the first inner connecting threaded hole section 102 in the partial axial direction, and the anchor rod is more easily separated from the drill bit sleeve when the anchor rod is disassembled.

[0062] Further, a plurality of second through grooves are formed in the circumferential direction of the inner wall of the first inner connecting threaded hole section 102, the plurality of second through grooves are formed in different axial sections of the inner wall of the first inner connecting threaded hole section 102, and the projection of the plurality of second through grooves in the axial direction covers at least all of the axial section of the first inner connecting threaded hole section 102.

[0063] The single second through groove cuts part of the axial section of the first inner connecting threaded hole segment 102 in the embodiment, and the multiple second through grooves combine to cut the entire axial section of the first inner connecting threaded hole segment 102, thereby reducing the locking force of the first inner connecting threaded hole segment 102 in the entire axial direction.

[0064] In addition, the multiple second through grooves are arranged along the circumference of the inner wall of the first inner connecting threaded hole segment 102 in the embodiment, and the locking force of the first inner connecting threaded hole segment 102 in the entire circumferential direction is reduced.

[0065] Specifically, the through groove 103 of the drill bit sleeve in the embodiment comprises first arc-shaped sub-groove segments and second arc-shaped sub-groove segments that are alternately connected, and the maximum groove width of the first arc-shaped sub-groove segments is greater than the maximum groove width of the second arc-shaped sub-groove segments. The through groove 103 in the embodiment is an arc-shaped through groove, the groove width of the second arc-shaped sub-groove segments is smaller, so that the first inner connecting threaded hole segment 102 is locked to the anchor rod when the anchor rod is screwed in, and the maximum groove width of the first arc-shaped sub-groove segments is greater, so as to reduce the locking force of the first inner connecting threaded hole segment 102 to the anchor rod when the anchor rod is disassembled. Therefore, the structural design of the through groove 103 in the embodiment can not only ensure that the first inner connecting threaded hole segment 102 is locked to the anchor rod when the anchor rod is screwed in, but also reduce the locking force of the first inner connecting threaded hole segment 102 to the anchor rod when the anchor rod is disassembled, thereby facilitating the disassembly of the anchor rod.

[0066] Further, the minimum groove width of the through groove 103 in the embodiment is greater than the internal thread pitch of the first inner connecting threaded hole segment 102, so that the locking force of the first inner connecting threaded hole segment 102 to the anchor rod when the anchor rod is disassembled can be effectively reduced.

[0067] The embodiment also provides an anchor rod drilling device with the drill bit sleeve, which comprises:

[0068] The rock drill 300 comprises a rock drill main machine and a drill bit 301 connected to the rock drill main machine, and the drill bit 301 is threadedly connected to the second inner connecting threaded hole segment 104 of the drill bit sleeve 100.

[0069] The anchor rod 200 is threadedly connected to the first inner connecting threaded hole segment 102 of the drill bit sleeve 100.

[0070] The drill bit 301 of the rock drill 300 and the end of the anchor rod 200 are respectively abutted against the pad 105 of the drill bit sleeve 100.

[0071] The anchor rod drilling device of the embodiment, the second inner connecting threaded hole section 104 of the drill bit sleeve 100 is only connected with a section of the connecting thread of the drill bit 301, and the variable-diameter hole section is no longer arranged to match the variable-diameter shaft body structure of the drill bit 301, so that the variable-diameter shaft body structure of the drill bit 301 is prevented from being more and more tightly screwed with the variable-diameter hole section of the drill bit sleeve 100 in the drilling process, and the phenomenon that the drill bit 301 of the rock drill 300 is tightly screwed with the drill bit sleeve 100 and cannot be separated is avoided.

[0072] In addition, the drill bit sleeve is internally provided with a pad 105 in the embodiment:

[0073] 1. The drill bit 301 of the rock drill 300 directly contacts the pad 105, and the pad 105 contacts the end surface of the anchor rod 200, so that the impact force of the rock drill 300 is directly transmitted through the end surface, instead of being transmitted through the threaded connection, and the deformation of the thread is avoided.

[0074] 2. Because the pad 105 has a first installation gap d between the inner side end of the second inner connecting threaded hole section 104, when the anchor rod needs to be disassembled, the drill bit 301 of the rock drill 300 is reversed, and the drill bit 301 of the rock drill 300 is more easily separated.

[0075] In addition, the anchor rod drilling device of the embodiment, the first inner connecting threaded hole section 102 and the second inner connecting threaded hole section 104 are communicated through the tool withdrawal groove 103. In this way, the first inner connecting threaded hole section 102 and the second inner connecting threaded hole section 104 realize a through channel, the slurry can be injected through the through channel in the drilling process, the grouting hole is arranged on the outer wall of the anchor rod, and the drilling and grouting are realized in the drilling process of the anchor rod, so that the drilling effect is greatly improved.

[0076] Further, the drill bit 301 of the rock drill 300 includes an integrally formed outer threaded connection section 301A, a transition connection section (301B, 301C), and a drill bit base section 301D, the drill bit base section 301D is connected with the main machine of the rock drill, the outer diameter of the outer threaded connection section 301A is smaller than the outer diameter of the drill bit base section 301D, and the transition connection section (301B, 301C) transitions the outer threaded connection section 301A and the drill bit base section 301D.

[0077] The outer threaded connection section 301A of the drill bit 301 is threadedly connected with the second inner connecting threaded hole section 104 of the drill bit sleeve 100, and the transition connection section (301B, 301C) is located outside the second inner connecting threaded hole section 104 of the drill bit sleeve 100.

[0078] The shank 301 of the embodiment is screwed with the second inner connecting threaded hole section 104 of the shank sleeve 100, the transition connecting sections (301B, 301C) and the shank base section 301D are all located outside the second inner connecting threaded hole section 104, so as to avoid the shank 301 and the shank sleeve 100 from being screwed and locked and unable to be separated.

[0079] Specifically, the transition connecting section of the embodiment comprises a cylindrical shaft section 301B and a circular truncated cone shaft section 301C, the cylindrical shaft section 301B is integrally connected with the outer threaded connecting section 301A, the large diameter end of the circular truncated cone shaft section 301C is integrally connected with the shank base section 301D, and the small diameter end of the circular truncated cone shaft section 301C is integrally connected with the cylindrical shaft section 301B; the outer threaded connecting section 301A of the shank 301 is screwed with the second inner connecting threaded hole section 104 of the shank sleeve 100, at least part of the cylindrical shaft section 301B extends into the second inner connecting threaded hole section 104, and the circular truncated cone shaft section 301C is located outside the second inner connecting threaded hole section 104 of the shank sleeve 100.

[0080] The outer diameter of the cylindrical shaft section 301B of the embodiment is smaller than the outer diameter of the outer threaded connecting section 301A.

[0081] The outer diameter of the large diameter end of the circular truncated cone shaft section 301C of the embodiment is larger than the outer diameter of the outer threaded connecting section 301A.

[0082] The anchor drilling device of the embodiment comprises a drill bit 400, the drill bit 400 is installed at the end of the anchor rod 200, and the drill bit 400 drives the anchor rod to realize drilling.

[0083] The above embodiments are only used to illustrate the technical solutions described in the utility model and not to limit the utility model, although the utility model has been described in detail with reference to the above embodiments, the utility model is not limited to the above specific embodiments, therefore, any modification or equivalent replacement of the utility model, and all technical solutions and improvements without departing from the spirit and scope of the utility model are all covered in the claim range of the utility model.

Claims

1. A shank sleeve characterized in that, The application relates to a sleeve body and a rock drill. The sleeve body has a first inner connecting thread hole section and a tool withdrawal groove inside one end of the sleeve body, and has a second inner connecting thread hole section inside the other end of the sleeve body; the second inner connecting thread hole section is a flat inner connecting thread hole section; the inner side end of the second inner connecting thread hole section is communicated with the tool withdrawal groove; the outer side end of the second inner connecting thread hole section is flat and penetrates through the end of the other end of the sleeve body; the inner diameter of the tool withdrawal groove is larger than the inner diameter of the first inner connecting thread hole section; the inner diameter of the first inner connecting thread hole section is larger than the inner diameter of the second inner connecting thread hole section; the first inner connecting thread hole section and the second inner connecting thread hole section have the same rotation direction; the first inner connecting thread hole section is used for connecting an anchor rod; and the second inner connecting thread hole section is used for connecting a drill bit of a rock drill. A spacer is arranged in the tool withdrawal groove of the sleeve body and has a first installation gap between the inner side end of the second inner connecting thread hole section.

2. A sleeve according to claim 1, wherein The axial width of the tool withdrawal groove is larger than the axial thickness of the spacer; the spacer is arranged in the tool withdrawal groove of the sleeve body and has a first installation gap between the inner side end of the first inner connecting thread hole section.

3. A sleeve according to claim 1, wherein The outer periphery of the spacer has an outer connecting thread which is matched with the first inner connecting thread hole section; the spacer is screwed by the first inner connecting thread hole section until the spacer is separated from the first inner connecting thread hole section and is withdrawn into the tool withdrawal groove.

4. A sleeve according to claim 3, wherein The spacer has a second installation gap between the inner side end of the first inner connecting thread hole section in the tool withdrawal groove.

5. An anchor drilling apparatus having a shank sleeve as claimed in any one of claims 1 to 4, characterised in that, The application further relates to a rock drill. The rock drill comprises a rock drill main machine and a drill bit which is connected with the rock drill main machine; the drill bit is threadedly connected with the second inner connecting thread hole section of the drill bit sleeve; and the anchor rod is threadedly connected with the first inner connecting thread hole section of the drill bit sleeve. The end of the drill bit of the rock drill abuts against the spacer of the drill bit sleeve. The drill bit of the rock drill comprises an integral outer thread connecting section, a transition connecting section and a drill bit base section; the outer diameter of the outer thread connecting section is smaller than the outer diameter of the drill bit base section; and the transition connecting section connects the outer thread connecting section and the drill bit base section.

6. An anchor rod drilling apparatus as claimed in claim 5, characterised in that, The outer thread connecting section of the drill bit is threadedly connected with the second inner connecting thread hole section of the drill bit sleeve; and the transition connecting section is located outside the second inner connecting thread hole section of the drill bit sleeve. The transition connecting section comprises a cylindrical shaft section and a circular truncated cone shaft section; the cylindrical shaft section is integrally connected with the outer thread connecting section; the large-diameter end of the circular truncated cone shaft section is integrally connected with the drill bit base section; and the small-diameter end of the circular truncated cone shaft section is integrally connected with the cylindrical shaft section.

7. An anchor rod drilling apparatus as claimed in claim 6, characterised in that, The outer diameter of the cylindrical shaft section is smaller than the outer diameter of the outer thread connecting section. The outer diameter of the large-diameter end of the circular truncated cone shaft section is larger than the outer diameter of the outer thread connecting section.

8. An anchor rod drilling apparatus as claimed in claim 7, characterised in that, ​ 9. An anchor rod drilling apparatus as claimed in claim 7, characterised in that, ​

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