An anchor excavating machine

Abstract

The application provides a tunnel anchor machine and relates to the technical field of tunnel anchor machine equipment. The tunnel anchor machine comprises an upper body of the tunnel anchor machine and a lower body of the tunnel anchor machine, the lower end of the upper body of the tunnel anchor machine is provided with a self-lubricating part, the lower body of the tunnel anchor machine is provided with a connecting shaft, the length direction of the connecting shaft is used for being consistent with the tunneling direction of the tunnel anchor machine, one end of the connecting shaft is arranged on the lower body of the tunnel anchor machine, the other end penetrates through the self-lubricating part and is in sliding connection with the self-lubricating part, and the self-lubricating part slides on the connecting shaft through an oil cylinder. In this way, the sliding connection between the self-lubricating part and the connecting shaft realizes the movement of the upper body of the tunnel anchor machine relative to the lower body of the tunnel anchor machine, so that the tunnel anchor machine can realize the fixed-point cutting operation and has the functions of cutting compensation and section shaping, thereby avoiding the movement of the whole tunnel anchor machine and improving the tunneling efficiency.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of anchor excavator, in particular to an anchor excavator. BACKGROUND

[0002] At present, few of the existing anchor excavators at home and abroad have the function of sliding on the lower body of the anchor excavator, and the connection mode of the anchor excavator upper body and the anchor excavator lower body is mostly slide rail connection. In the slide rail connection, the slide rail forms a rectangular groove, the slider is a corresponding rectangular structure, and the anchor excavator upper body slides in the groove through the slider. However, the groove and the slider are in a relative sliding friction state during work, and after a period of use, there will be a lot of wear. Since both the groove and the slider are designed in a rectangular shape, it is difficult to compensate and correct after wear. The gap between the groove and the slider becomes larger and larger with the increase of the use time, and even the contact between the slider and the groove changes from surface contact to line contact, which causes rapid wear, unstable work of the anchor excavator, and even severe damage due to the alternating load impact caused by long-time cutting. At the same time, after the slider is severely worn, it must be disassembled and replaced, which is time-consuming and laborious, and affects the tunneling efficiency. SUMMARY

[0003] The problem solved by the present application is how to improve the tunneling efficiency of the anchor excavator in the related art.

[0004] To solve the above problems, the present application provides an anchor excavator, which comprises an anchor excavator upper body and an anchor excavator lower body. The lower end of the anchor excavator upper body is provided with a self-lubricating part, the anchor excavator lower body is provided with a connecting shaft, the length direction of the connecting shaft is used to be consistent with the tunneling direction of the anchor excavator, one end of the connecting shaft is arranged on the anchor excavator lower body, the other end penetrates through the self-lubricating part and is in sliding connection with the self-lubricating part, and the self-lubricating part slides on the connecting shaft through an oil cylinder.

[0005] Optionally, the anchor excavator upper body is provided with a first connecting seat at each end in the tunneling direction, the anchor excavator lower body is located between the first connecting seats, the self-lubricating part is arranged on the first connecting seat, and the anchor excavator lower body is provided with two second connecting seats at each end in the tunneling direction, and the two ends of the connecting shaft are connected with the two second connecting seats respectively.

[0006] Optionally, the connecting shaft comprises a first shaft segment and a second shaft segment, the anchor excavator upper body is provided with a first connecting seat corresponding to the first shaft segment and the second shaft segment respectively, and the first connecting seat is in sliding connection with the connecting shaft through the self-lubricating part.

[0007] Optionally, a supporting seat is arranged at the connection between the first shaft segment and the second shaft segment, and the supporting seat is arranged on the anchor excavator upper body.

[0008] Optionally, the self-lubricating part is a self-lubricating bearing, which is arranged on the first connecting seat and is provided with a sealing ring at both ends in the length direction of the connecting shaft.

[0009] Optionally, the first connecting seat is provided with an end cover at both ends in the length direction of the connecting shaft, the end cover is used for limiting the movement of the self-lubricating bearing on the first connecting seat, and the sealing ring is arranged on the end cover.

[0010] Optionally, the self-lubricating bearing is provided with a hole, which is in communication with the surface of the connecting shaft, and the hole is used for embedding solid lubricating material.

[0011] Optionally, the surface of the connecting shaft is provided with a hard chromium layer.

[0012] Optionally, the upper body and the lower body of the anchor excavator are both arranged in a frame type plate welding structure.

[0013] Optionally, the upper body of the anchor excavator is further provided with a rotary supporting structure, a rotary oil cylinder and a cutting part, the rotary oil cylinder is drivingly connected with the rotary supporting structure, the rotary supporting structure is drivingly connected with the cutting part, and the rotary oil cylinder drives the cutting part to rotate on the upper body of the anchor excavator through the rotary supporting structure.

[0014] Compared with the prior art, the anchor excavator of the present application is arranged at the lower end of the upper body of the anchor excavator through a self-lubricating part, and is slidingly connected with the connecting shaft on the lower body of the anchor excavator, and the length direction of the connecting shaft is consistent with the advancing direction of the anchor excavator, so as to realize the movement of the upper body of the anchor excavator relative to the lower body of the anchor excavator in the advancing direction. When the self-lubricating part slides on the connecting shaft through the oil cylinder, the self-lubricating part can reduce the roughness of the surface of the connecting shaft. Therefore, the sliding connection between the self-lubricating part and the connecting shaft realizes the movement of the upper body of the anchor excavator relative to the lower body of the anchor excavator, so as to realize the fixed-point cutting operation of the anchor excavator and has the functions of compensating cutting and repairing the cutting surface, thereby avoiding the movement of the whole anchor excavator, improving the advancing efficiency, and meeting the requirements of high advancing speed, high flexibility and strong adaptability of the anchor excavator to a certain extent. In addition, compared with the sliding mode of the guide rail and the sliding block, the sliding wear between the self-lubricating part and the connecting shaft is reduced, and the service life is prolonged. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 The structure of the anchor excavator in the embodiment of the present application is shown in the figure Figure 1 ;

[0016] Figure 2 is a side view of the excavating and anchoring machine in the embodiment of the present application;

[0017] Figure 3 is a top view of the excavating and anchoring machine in the embodiment of the present application;

[0018] Figure 4 is a structural schematic of the excavating and anchoring machine in the embodiment of the present application Figure 2 ;

[0019] Figure 5 is an enlarged view of A in the embodiment of the present application. Figure 4

[0020] BRIEF DESCRIPTION OF DRAWINGS

[0021] 1 - upper body of the excavating and anchoring machine; 11 - self-lubricating part; 12 - first connecting seat; 13 - sealing ring; 14 - end cover; 15 - slewing bearing structure; 16 - slewing oil cylinder; 17 - cutting part; 2 - lower body of the excavating and anchoring machine; 21 - connecting shaft; 211 - first shaft section; 212 - second shaft section; 22 - second connecting seat; 23 - supporting seat. DETAILED DESCRIPTION

[0022] In order to make the above object, features and advantages of the present application more obvious and easy to understand, the specific embodiments of the present application are described in detail below with reference to the drawings.

[0023] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connection" should be understood in a broad sense, for example, it can be fixed connection, or detachable connection, or integrally connected; it can be directly connected, or indirectly connected through an intermediate medium. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0024] In the description of the present application, the description of the terms "embodiment", "one embodiment", "some embodiments", "exemplarily" and "one embodiment" means that the specific features, structures, materials or characteristics described in connection with the embodiment or embodiment are included in at least one embodiment or embodiment of the present application. In the present application, the illustrative description of the above terms does not necessarily refer to the same embodiment or embodiment. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or embodiments in a suitable manner.

[0025] The terms "first", "second", etc. are only for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features.​

[0026] In the drawings, the Z-axis represents the vertical direction, i.e. the up-down position, and the positive direction of the Z-axis, i.e. the direction in which the arrow of the Z-axis points, represents up, and the negative direction of the Z-axis, i.e. the direction opposite to the positive direction of the Z-axis, represents down; the X-axis represents the horizontal direction, i.e. the left-right position, and the positive direction of the X-axis, i.e. the direction in which the arrow of the X-axis points, represents the left side, and the negative direction of the X-axis, i.e. the direction opposite to the positive direction of the X-axis, represents the right side; the Y-axis represents the front-rear position, and the positive direction of the Y-axis, i.e. the direction in which the arrow of the Y-axis points, represents the front side, and the negative direction of the Y-axis, i.e. the direction opposite to the positive direction of the Y-axis, represents the rear side; it should be noted that the above-mentioned meanings of the Z-axis, the Y-axis and the X-axis are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0027] In combination with Figure 1 and Figure 2 As shown in the drawings, the embodiment of the present application provides a tunnel anchor machine, which comprises an upper body 1 of the tunnel anchor machine and a lower body 2 of the tunnel anchor machine, the lower end of the upper body 1 of the tunnel anchor machine is provided with a self-lubricating part 11, the lower body 2 of the tunnel anchor machine is provided with a connecting shaft 21, the length direction of the connecting shaft 21 is used to be consistent with the tunneling direction of the tunnel anchor machine, one end of the connecting shaft 21 is arranged on the lower body 2 of the tunnel anchor machine, the other end penetrates through the self-lubricating part 11 and is in sliding connection with the self-lubricating part 11, and the self-lubricating part 11 slides on the connecting shaft 21 through an oil cylinder.

[0028] Specifically, the Y-axis direction is the tunneling direction, the upper body 1 of the tunnel anchor machine can realize the section of the roadway and cut down the coal or coal rock; the lower body 2 of the tunnel anchor machine realizes the support of the upper body 1 of the tunnel anchor machine. The lower end of the upper body 1 of the tunnel anchor machine, i.e. the end of the upper body 1 of the tunnel anchor machine towards the negative direction of the Z-axis, is provided with the self-lubricating part 11, the lower body 2 of the tunnel anchor machine is provided with the connecting shaft 21 at the position corresponding to the self-lubricating part 11, the length direction of the connecting shaft 21 is consistent with the Y-axis direction, the self-lubricating part 11 is provided with a through hole matched with the radial dimension of the connecting shaft 21, the end of the connecting shaft 21 towards the positive direction of the Y-axis penetrates through the through hole and can be detachably connected with the lower body 2 of the tunnel anchor machine through a mounting bracket, etc., the end of the connecting shaft 21 towards the negative direction of the Y-axis can be detachably connected with the lower body 2 of the tunnel anchor machine through a mounting bracket, etc., and the self-lubricating part 11 slides on the connecting shaft 21 through an oil cylinder, wherein the self-lubricating part 11 can be a self-lubricating graphite copper sleeve, a self-lubricating bearing or a sleeve with self-lubricating function, etc. During tunneling, the oil cylinder drives the self-lubricating part 11 to slide on the connecting shaft 21 to realize the front-rear movement of the upper body 1 of the tunnel anchor machine relative to the lower body 2 of the tunnel anchor machine, wherein the sliding distance of the self-lubricating part 11 on the connecting shaft 21 can be set to 400 mm.

[0029] The self-lubricating part 11 is arranged at the lower end of the upper body 1 of the anchor excavator and is in sliding connection with the connecting shaft 21 on the lower body 2 of the anchor excavator. The length direction of the connecting shaft 21 is consistent with the advancing direction of the anchor excavator, so that the movement of the upper body 1 of the anchor excavator relative to the lower body 2 of the anchor excavator in the advancing direction is realized. When the self-lubricating part 11 slides on the connecting shaft 21 through the oil cylinder, the roughness of the surface of the connecting shaft 21 can be reduced. Thus, the sliding connection between the self-lubricating part 11 and the connecting shaft 21 realizes the movement of the upper body 1 of the anchor excavator relative to the lower body 2 of the anchor excavator, so as to realize the fixed-point cutting operation of the anchor excavator and have the functions of cutting compensation and cross section modification, thereby avoiding the movement of the whole anchor excavator, improving the advancing efficiency, and meeting the requirements of high advancing speed, high flexibility, and strong adaptability of the anchor excavator to a certain extent. In addition, compared with the sliding mode of the guide rail and the sliding block, the sliding wear between the self-lubricating part 11 and the connecting shaft 21 is reduced, and the service life is prolonged.

[0030] Optionally, in combination with the self-lubricating part 11 shown in Figure 1 and Figure 2 , the upper body 1 of the anchor excavator is provided with a first connecting seat 12 at each end in the advancing direction. The lower body 2 of the anchor excavator is located between the first connecting seats 12. The self-lubricating part 11 is arranged on the first connecting seat 12. The lower body 2 of the anchor excavator is provided with two second connecting seats 22 at each end in the advancing direction. The two ends of the connecting shaft 21 are connected with the two second connecting seats 22, respectively.

[0031] Specifically, the X-axis is the left and right ends of the upper body 1 of the anchor excavator and the lower body 2 of the anchor excavator. The upper body 1 of the anchor excavator is provided with a first connecting seat 12 at each end. The self-lubricating part 11 is arranged on the first connecting seat 12. The lower body 2 of the anchor excavator is located between the first connecting seats 12. The lower body 2 of the anchor excavator is provided with two second connecting seats 22 at each end in the advancing direction. The two ends of the connecting shaft 21 are connected with the two second connecting seats 22, respectively. The self-lubricating parts 11 on the left and right sides are in sliding connection with the corresponding connecting shafts 21, respectively.

[0032] Thus, the first connecting seat 12 is arranged at both ends of the upper body 1 of the roof bolter in the tunneling direction, the second connecting seat 22 is arranged at both ends of the lower body 2 of the roof bolter in the tunneling direction, and the mounting space of the self-lubricating part 11 and the connecting shaft 21 is provided on the left and right sides of the upper body 1 and the lower body 2 of the roof bolter; and the lower body 2 of the roof bolter is located between the first connecting seat 12, the self-lubricating part 11 is arranged on the first connecting seat 12, and the connecting shaft 21 is arranged between the second connecting seat 22 and is in sliding connection with the self-lubricating part 11, so that the number of the connecting shaft 21 and the corresponding self-lubricating part 11 can be increased to improve the sliding efficiency.

[0033] Optionally, in combination with Figure 1 and Figure 2 , the connecting shaft 21 comprises a first shaft section 211 and a second shaft section 212, the first connecting seat 12 is arranged on the upper body 1 of the roof bolter corresponding to the first shaft section 211 and the second shaft section 212, and the first connecting seat 12 is in sliding connection with the connecting shaft 21 through the self-lubricating part 11.

[0034] Specifically, the first shaft section 211 is a section of the connecting shaft 21 towards the positive direction of the Y-axis, the second shaft section 212 is a section of the connecting shaft 21 towards the negative direction of the Y-axis, the first connecting seat 12 is arranged on the upper body 1 of the roof bolter corresponding to the first shaft section 211, the first connecting seat 12 is also arranged on the upper body 1 of the roof bolter corresponding to the second shaft section 212, and the first connecting seat 12 is in sliding connection with the first shaft section 211 and the second shaft section 212 through the self-lubricating part 11.

[0035] Thus, the first connecting seat 12 is arranged at both ends of the upper body 1 of the roof bolter in the tunneling direction, the second connecting seat 22 is arranged at both ends of the lower body 2 of the roof bolter in the tunneling direction, and the mounting space of the self-lubricating part 11 and the connecting shaft 21 is provided on the left and right sides of the upper body 1 and the lower body 2 of the roof bolter; and the lower body 2 of the roof bolter is located between the first connecting seat 12, the self-lubricating part 11 is arranged on the first connecting seat 12, and the connecting shaft 21 is arranged between the second connecting seat 22 and is in sliding connection with the self-lubricating part 11, so that the number of the connecting shaft 21 and the corresponding self-lubricating part 11 can be increased to improve the sliding efficiency.

[0036] Optionally, in combination with Figure 1 and Figure 2 , the first shaft section 211 and the second shaft section 212 are connected with the support seat 23 arranged on the upper body 1 of the roof bolter.

[0037] Specifically, the support seat 23 is located between the rear end of the first shaft section 211 and the front end of the second shaft section 212 and is connected with the first shaft section 211 and the second shaft section 212, respectively, and the support seat 23 is welded on the upper body 1 of the roof bolter.

[0038] Thus, the support seat 23 is arranged at the joint of the first shaft segment 211 and the second shaft segment 212 and on the body 1 of the roof bolter, and the support seat 23 is supported by the body 1 of the roof bolter to support the first shaft segment 211 and the second shaft segment 212, so that the support seat 23 supports the middle part of the connecting shaft 21 when the body 1 of the roof bolter slides, thereby improving the structural strength of the connecting shaft 21.

[0039] Optionally, as shown in Figure 1 , Figure 4 and Figure 5 , the self-lubricating part 11 is arranged as a self-lubricating bearing, the self-lubricating bearing is arranged on the first connecting seat 12, and the self-lubricating bearing is provided with a sealing ring 13 at both ends in the length direction of the connecting shaft 21.

[0040] Specifically, the self-lubricating bearing is embedded in the first connecting seat 12, and the self-lubricating bearing is provided with a sealing ring 13 on the front and back sides, respectively, wherein the sealing ring 13 is made of TPU polyurethane material, NMK high-quality dustproof sealing ring, wear-resistant, pressure-resistant and oil-resistant, the hardness of the sealing ring 13 is HS85±5°A, the working temperature is between-40 and 120℃, and the maximum working pressure is 32MPa.

[0041] Thus, by arranging the self-lubricating part 11 as a self-lubricating bearing, arranging the self-lubricating bearing on the first connecting seat 12, and arranging the sealing ring 13 at both ends of the self-lubricating bearing in the length direction of the connecting shaft 21, when the self-lubricating bearing slides on the connecting shaft 21, the sealing ring 13 isolates the self-lubricating bearing from the external environment, thereby avoiding the influence of the external environment on the sliding connection between the self-lubricating bearing and the connecting shaft 21, improving the sliding efficiency of the self-lubricating bearing, and the self-lubricating bearing has very small wear and tear, can be used for a long time without frequent replacement, reduces economic losses caused by maintenance and replacement of bearings, and directly improves the driving efficiency.

[0042] Optionally, as shown in Figure 1 , Figure 4 and Figure 5 , the first connecting seat 12 is provided with an end cover 14 at both ends in the length direction of the connecting shaft 21, the end cover 14 is used to limit the movement of the self-lubricating bearing on the first connecting seat 12, and the end cover 14 is provided with a sealing ring 13.

[0043] Specifically, the first connecting seat 12 is provided with an end cover 14 at both ends, the self-lubricating bearing is arranged between the end covers 14, the two end covers 14 limit the movement of the self-lubricating bearing on the first connecting seat 12, and the sealing ring 13 is connected with the end cover 14 and the connecting shaft 21, respectively.

[0044] Thus, the end cover 14 is arranged at both ends of the first connecting seat 12 in the length direction of the connecting shaft 21, and the self-lubricating bearing is limited from moving on the first connecting seat 12, and the sealing ring 13 is arranged on the end cover 14, so that the end cover 14 realizes synchronous movement of the first connecting seat 21, the self-lubricating bearing and the sealing ring 13, thereby improving the connection stability of the self-lubricating bearing and the sealing ring 13 with the first connecting seat 12 when the body 1 slides on the anchor excavator.

[0045] Optionally, the self-lubricating bearing is provided with a hole communicating with the surface of the connecting shaft 21, and the hole is used for embedding the solid lubricating material.

[0046] Specifically, the self-lubricating bearing is a JDB series embedded solid lubricating bearing, which takes metal material as a matrix, and a hole with proper size and order is opened on the matrix, and then graphite or molybdenum disulfide particles containing oil are embedded as solid lubricating materials. When the high-strength self-lubricating bearing works under the condition of no oil lubrication, the solid lubricating materials will gradually transfer to the working surface of the friction pair due to the effect of friction heat, thereby reducing the friction coefficient.

[0047] Thus, the hole on the self-lubricating bearing communicates with the surface of the connecting shaft 21, and the hole can embed the solid lubricating material, so that when the body 1 slides on the anchor excavator, the solid lubricating material will gradually transfer to the working surface of the friction pair, thereby reducing the friction coefficient and improving the sliding efficiency.

[0048] Optionally, the surface of the connecting shaft 21 is provided with a hard chromium layer.

[0049] Thus, the surface of the connecting shaft 21 is provided with a hard chromium layer, so that the bending resistance of the connecting shaft 21 is strong, and the connecting shaft 21 can bear the load from the body 1 of the anchor excavator and resist the alternating impact caused by severe cutting, thereby improving the structural strength of the connecting shaft 21.

[0050] Optionally, the body 1 of the anchor excavator and the body 2 of the anchor excavator are both provided with a frame type plate welding structure. Thus, the overall strength of the body 1 of the anchor excavator and the body 2 of the anchor excavator is high.

[0051] Optionally, in combination with Figures 1 to 3 As shown in the figure, the body 1 of the anchor excavator is further provided with a rotary supporting structure 15, a rotary oil cylinder 16 and a cutting part 17. The rotary oil cylinder 16 is drivingly connected with the rotary supporting structure 15, the rotary supporting structure 15 is drivingly connected with the cutting part 17, and the rotary oil cylinder 16 drives the cutting part 17 to rotate on the body 1 of the anchor excavator through the rotary supporting structure 15.

[0052] Specifically, the rotary oil cylinder 16 is hinged at the rear end of the upper body 1 of the excavator, the rotary bearing structure 15 is rotatably connected to the front end of the upper body 1 of the excavator, and the cutting part 17 is connected to the rotary bearing structure 15 by bolts, wherein two rotary oil cylinders 16 are symmetrically arranged on the upper body 1 of the excavator with the Y axis as the center, the rotary oil cylinder 16 is drivingly connected to the circumferential end of the rotary bearing structure 15, the rotary oil cylinder 16 drives the rotary bearing structure 15 to rotate in the XY plane, and further drives the cutting part 17 to rotate in the XY plane.

[0053] In this way, the rotary oil cylinder 16 drives the cutting part 17 to rotate on the upper body 1 of the excavator through the rotary bearing structure 15, and the deflection of the cutting part 17 is realized, so that the cutting part 17 can be horizontally deflected while moving forward and backward on the upper body 1 of the excavator, thereby improving the efficiency of excavation.

[0054] Although the present disclosure is disclosed as above, the protection scope of the present disclosure is not limited to this. Those skilled in the art can make various modifications and changes without departing from the spirit and scope of the present disclosure, and these modifications and changes shall fall within the protection scope of the present disclosure.

Claims

1. A rock drilling rig, characterized in that The invention relates to a tunneling and anchoring machine, which comprises an upper body (1) and a lower body (2), the lower end of the upper body (1) is provided with a self-lubricating part (11), the lower body (2) is provided with a connecting shaft (21), the length direction of the connecting shaft (21) is consistent with the tunneling direction of the tunneling and anchoring machine, one end of the connecting shaft (21) is arranged on the lower body (2), the other end penetrates through the self-lubricating part (11) and is in sliding connection with the self-lubricating part (11), and the self-lubricating part (11) slides on the connecting shaft (21) through an oil cylinder. The upper body (1) is provided with a first connecting seat (12) at each end in the tunneling direction. The self-lubricating part (11) is a self-lubricating bearing, which is arranged on the first connecting seat (12), and the self-lubricating bearing is provided with a sealing ring (13) at each end in the length direction of the connecting shaft (21). The first connecting seat (12) is provided with an end cover (14) at each end in the length direction of the connecting shaft (21), the end cover (14) is used to limit the movement of the self-lubricating bearing on the first connecting seat (12), and the end cover (14) is provided with the sealing ring (13).

2. A rock drilling rig according to claim 1, characterized in that The lower body (2) is located between the first connecting seats (12), the self-lubricating part (11) is arranged on the first connecting seats (12), and the lower body (2) is provided with two second connecting seats (22) at each end in the tunneling direction, and the two ends of the connecting shaft (21) are connected with the two second connecting seats (22) respectively.

3. A rock drilling rig according to claim 1, characterized in that The connecting shaft (21) comprises a first shaft section (211) and a second shaft section (212), the upper body (1) is provided with the first connecting seat (12) corresponding to the first shaft section (211) and the second shaft section (212), and the first connecting seat (12) is in sliding connection with the connecting shaft (21) through the self-lubricating part (11).

4. A rock drilling rig according to claim 3, characterized in that The first shaft section (211) and the second shaft section (212) are connected with a support seat (23), and the support seat (23) is arranged on the upper body (1).

5. A rock drilling rig according to claim 1, characterized in that The self-lubricating bearing is provided with a hole, which is in communication with the surface of the connecting shaft (21), and the hole is used to embed solid lubricating material.

6. A rock drilling rig according to claim 1, characterized in that The surface of the connecting shaft (21) is provided with a hard chromium layer.

7. A rock drilling rig according to claim 1, characterized in that The upper body (1) and the lower body (2) are both provided with a frame type plate welding structure.

8. A rock drilling rig according to claim 1, characterized in that The upper body (1) is further provided with a rotary supporting structure (15), a rotary oil cylinder (16) and a cutting part (17), the rotary oil cylinder (16) is in driving connection with the rotary supporting structure (15), the rotary supporting structure (15) is in transmission connection with the cutting part (17), and the rotary oil cylinder (16) drives the cutting part (17) to rotate on the upper body (1) through the rotary supporting structure (15).

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