angle sensing device for rock drilling jumbo

Abstract

The application provides a special angle sensing device on a rock drilling jumbo, which comprises a mounting seat, a central hole is arranged on the mounting seat, a shaft sleeve is arranged in the central hole, the target rotating shaft can be sleeved in the central hole through the shaft sleeve, an adapter seat is mounted on the mounting seat along the axial direction of the target rotating shaft, an adapter hole is arranged on the adapter seat and is communicated with the central hole, an angle sensor is mounted on the side of the adapter seat away from the mounting seat, the angle sensor has an input shaft corresponding to the adapter hole, an auxiliary connecting assembly is arranged, the input shaft can be connected with the target rotating shaft through the auxiliary connecting assembly, the input shaft of the angle sensor can rotate synchronously with the target rotating shaft, the auxiliary connecting assembly has an elastic compression function along the axial direction of the input shaft, the auxiliary connecting assembly compensates the axial spacing deviation of the two in the assembling or running process, and the technical problems that the connection of the angle sensor and the target rotating shaft is difficult, the measurement precision is reduced and the maintenance frequency is high due to the axial error are solved.

Description

Technical Field

[0001] This application relates to the technical field of measuring accessories for rock drilling rigs, and more particularly to a dedicated angle sensing device for rock drilling rigs. Background Technology

[0002] A rock drilling rig is a highly efficient rock drilling device widely used in drill-and-blast construction of tunnels and underground engineering projects. It typically consists of a mobile chassis, a hydraulic system, a control system, and multiple rock drills and their supporting drill arms. This equipment boasts excellent mobility, moving along tracks or autonomously within the tunnel, and supports multiple rock drills simultaneously, significantly improving drilling efficiency and construction progress. Through its flexible drill arm system, the rock drilling rig can precisely locate and drill blast holes at different positions, angles, and depths, making it one of the core pieces of equipment in modern mechanized tunnel construction. With the development of intelligent technology, rock drilling rigs are gradually evolving towards automation and intelligence to achieve more efficient and safer construction operations.

[0003] In the control system of an intelligent rock drilling rig, the angle sensor, as a key sensing element, plays a crucial role in real-time acquisition of the rotation angle information of each joint of the drill arm. This angle data is used to provide feedback and control the spatial attitude of the drill arm, enabling intelligent operation functions such as automatic positioning, path planning, and collision avoidance. Therefore, the measurement accuracy of the angle sensor directly determines the accuracy of the drilling rig's borehole positioning, thus affecting the overall blasting effect and construction quality. Furthermore, in complex and narrow tunnel environments, deviations in angle feedback can lead to malfunctions of the drill arm, threatening the personal safety of on-site construction personnel. Therefore, high-precision, high-reliability angle sensors are essential for ensuring the safe and efficient operation of intelligent rock drilling rigs.

[0004] However, existing angle sensors still have significant drawbacks in practical installation and application. Due to factors such as machining and assembly errors, structural deformation, or vibration, there is often an axial deviation (i.e., coaxiality error) between the input shaft of the angle sensor and the rotating shaft of the target being measured on the rock drilling rig. This causes additional stress when the two are connected, affecting the measurement accuracy of the sensor and even causing mechanical damage. Currently, sensors are generally installed using manual adjustment or rigid connections, which cannot effectively compensate for such axial errors. Frequent calibration and maintenance are required, increasing operating costs and reducing system reliability. This problem is particularly prominent under harsh working conditions. Therefore, how to design an angle sensor mounting structure that can adaptively compensate for axial errors and ensure stable and accurate measurements has become a pressing technical challenge in this field. Utility Model Content

[0005] This application provides a dedicated angle sensing device for rock drilling rigs, which solves the technical problems in the prior art such as difficulty in connection, decreased measurement accuracy, and frequent maintenance caused by axial error between the angle sensor input shaft and the target rotation shaft. The technical solution is as follows:

[0006] This application provides a dedicated angle sensing device for a rock drilling rig, used to measure the rotation angle of a target rotating shaft on the rock drilling rig. The device includes: a mounting base for mounting on a rotating shaft seat of the target rotating shaft, the mounting base having a central hole; a shaft assembly disposed within the central hole, allowing the target rotating shaft to be fitted into the central hole and rotate within the central hole based on the mounting base; an adapter seat mounted on the mounting base along the axial direction of the target rotating shaft, the adapter seat having an adapter hole communicating with the central hole; an angle sensor mounted on the side of the adapter seat away from the mounting base, the angle sensor having an input shaft corresponding to the adapter hole, the central axis of the input shaft coinciding with the central axis of the target rotating shaft; and an auxiliary connection assembly, the input shaft being connected to the target rotating shaft via the auxiliary connection assembly, so that the input shaft of the angle sensor can rotate synchronously with the target rotating shaft, and the auxiliary connection assembly having an elastic compression function along the axial direction of the input shaft.

[0007] In one embodiment, the auxiliary connection assembly includes: a positioning pin for being fitted onto the end of the target rotating shaft; a flexible coupling having a first connection port and a second connection port, and a compression part capable of compression or springback between the first connection port and the second connection port; the first connection port is sleeved on the input shaft, and the second connection port is sleeved on the positioning pin, so that the compression part can adapt to different distances between the input shaft and the target rotating shaft.

[0008] In one embodiment, the adapter hole includes: a first receiving cavity disposed on the side of the adapter near the mounting base, the first receiving cavity being used to receive the end of the target rotating shaft; and a second receiving cavity disposed on the side of the first receiving cavity away from the mounting base and communicating with the first receiving cavity, the second receiving cavity being used to receive the input shaft.

[0009] In one embodiment, the radial dimension of the first receiving cavity is greater than the radial dimension of the second receiving cavity.

[0010] In one embodiment, it further includes: a first sealing ring disposed in a first receiving cavity, the first sealing ring being arranged around a target rotation axis for sealing the installation gap between the adapter and the target rotation axis.

[0011] In one embodiment, the device further includes a second sealing ring disposed between the adapter and the angle sensor, and the second sealing ring surrounds the second receiving cavity to seal the installation gap between the adapter and the angle sensor.

[0012] In one embodiment, it further includes a sheath component mounted on the angle sensor for covering the angle sensor.

[0013] In one embodiment, the sheath component is configured as a U-shaped structure so that it can be flipped onto the angle sensor.

[0014] In one embodiment, the inner wall of the sheath component is further provided with a ring-shaped pressure sleeve; the angle sensor also has a signal line, which is bent and then inserted into the pressure sleeve to fix the signal line by clamping.

[0015] Compared with existing technologies, the dedicated angle sensing device for rock drilling rigs proposed in the above-mentioned technical solution, by setting a shaft assembly within the mounting base, allows the target rotating shaft to rotate stably within the central hole, ensuring that the sensing device can measure angles without affecting the movement of the original mechanical structure. Simultaneously, an adapter is used to mount the angle sensor on the axial side of the mounting base, ensuring that the input shaft of the angle sensor coincides with the central axis of the target rotating shaft. This structural layout maximizes coaxiality requirements, improving the accuracy and stability of installation. The core innovation of this application lies in the introduction of an auxiliary connecting component with axial elastic compression function. This auxiliary connecting component not only enables synchronous rotational transmission between the angle sensor input shaft and the target rotating shaft, but more importantly, its elastic structure automatically compensates for axial spacing deviations generated during assembly or operation. This adaptive compensation mechanism avoids problems such as assembly stress, jamming, and even sensor damage caused by small axial errors in traditional rigid connections, significantly improving the reliability and service life of the angle sensor.

[0016] In summary, the technical solution of this application not only improves the measurement accuracy and system stability of the angle sensor under complex working conditions and reduces the frequency of on-site debugging and maintenance, but also provides reliable data support for the high-precision automated operation of rock drilling rigs, and has good engineering application prospects and promotion value.

[0017] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of this application will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0018] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0019] Figure 1 This is a three-dimensional structural diagram of the dedicated angle sensing device on the rock drilling rig in the embodiments of this application;

[0020] Figure 2 This is a cross-sectional view of a dedicated angle sensing device on a rock drilling rig in an embodiment of this application.

[0021] Figure label:

[0022] 1. Mounting bracket;

[0023] 2. Shaft assembly;

[0024] 3. Adapter socket;

[0025] 30. Adapter hole; 301. First receiving cavity; 302. Second receiving cavity;

[0026] 4. Angle sensor;

[0027] 41. Input shaft; 42. Signal line;

[0028] 5. Positioning pin;

[0029] 6. Flexible coupling;

[0030] 7. First sealing ring;

[0031] 8. Second sealing ring;

[0032] 9. Sheath components;

[0033] 91. Wire clamping sleeve;

[0034] B1, Target rotation axis. Detailed Implementation

[0035] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0036] Reference Figure 1 and Figure 2As shown, an embodiment of this application proposes a dedicated angle sensing device for a rock drilling rig, used to measure the rotation angle of a target rotating shaft B1 on the rock drilling rig. This angle sensing device may include: a mounting base 1, configured on a rotating shaft seat of the target rotating shaft B1, the mounting base 1 having a central hole; a shaft fitting 2, configured within the central hole, allowing the target rotating shaft B1 to be fitted into the central hole, enabling the target rotating shaft B1 to rotate within the central hole based on the mounting base 1 via the shaft fitting 2; and an adapter 3, mounted on the mounting base 1 along the axial direction of the target rotating shaft B1. The adapter 3 is provided with an adapter hole 30, which is connected to the center hole; the angle sensor 4 is installed on the side of the adapter 3 away from the mounting base 1, the angle sensor 4 has an input shaft 41 corresponding to the adapter hole 30, and the central axis of the input shaft 41 can coincide with the central axis of the target rotation shaft B1; and an auxiliary connection assembly, through which the input shaft 41 can be connected to the target rotation shaft B1, so that the input shaft 41 of the angle sensor 4 can rotate synchronously with the target rotation shaft B1, and the auxiliary connection assembly has an elastic compression function along the axial direction of the input shaft 41.

[0037] Specifically, in the technical solution adopted in this application, the mounting base 1 can be detachably mounted on the rotating shaft seat of the target rotating shaft B1 by bolts to prevent the mounting base 1 from rotating with the target rotating shaft B1. A central hole for fitting the target rotating shaft B1 is provided on the mounting base 1, and a shaft assembly 2 for assisting the rotation of the target rotating shaft B1 is arranged in the central hole, so that the target rotating shaft B1 can rotate based on the mounting base 1 through the shaft assembly 2 in the central hole, so as to avoid the daily rotation of the target rotating shaft B1 being restricted by the mounting base 1. Angle sensor 4 is mounted on one side of the mounting base 1 along the axial direction of the target rotation shaft B1 via an adapter 3. An adapter hole 30 is provided on the adapter 3 to accommodate the input shaft 41 of angle sensor 4. The adapter hole 30 is connected to the center hole so that the central axis of the input shaft 41 can coincide with the central axis of the target rotation shaft B1. In this application, the adapter 3 can be a flange so that the adapter 3 can be detachably mounted on the mounting base 1 by bolts. Angle sensor 4 can also be mounted on the adapter 3 by bolts. The through hole in the middle of the flange can be used as the adapter hole 30, thereby saving the manufacturing cost of processing the adapter 3. Standard parts can be purchased directly. The key technical point of this application is that the input shaft 41 and the target rotating shaft B1 are connected by an auxiliary connecting assembly. This assembly allows the input shaft 41 and the target rotating shaft B1 to rotate synchronously, enabling the angle sensor 4 to measure the rotation angle of the target rotating shaft B1. Because the auxiliary connecting assembly has an elastic compression function, and the compression direction is the axial direction of the input shaft 41, the elastic compression amount of the auxiliary connecting assembly can be adapted to the distance between the input shaft 41 and the target rotating shaft B1, thus compensating for axial errors between them. This effectively avoids unreliable factors caused by axial errors when the input shaft 41 and the target rotating shaft B1 are rigidly connected. For example, problems such as mismatch between the connection dimensions between the input shaft 41 and the target rotating shaft B1 and the distance between the angle sensor 4 and the target rotating shaft B1, preventing effective connection, or ineffective compensation for changes in axial dimensions due to environmental factors, leading to excessively frequent maintenance and calibration of the angle sensor 4, can also be avoided.

[0038] Furthermore, refer to Figure 2 As shown, in some embodiments, the auxiliary connection component includes: a positioning pin 5 for being embedded in the end of the target rotating shaft B1; a flexible coupling 6 having a first connection port and a second connection port, and a compression part being provided between the first connection port and the second connection port; the first connection port is sleeved on the input shaft 41, and the second connection port is sleeved on the positioning pin 5, so that the compression part can adapt to different distances between the input shaft 41 and the target rotating shaft B1.

[0039] Specifically, in the technical solution adopted in this application, in order to achieve a stable connection between the input shaft 41 and the target rotating shaft B1 through an auxiliary connecting assembly, and to solve the above-mentioned problems using elastic compression function, the auxiliary connecting assembly may include a positioning pin 5 and a flexible coupling 6. The positioning pin 5 can be embedded in the outer end of the target rotating shaft B1 so that the positioning pin 5 can rotate synchronously with the target rotating shaft B1. Preferably, the central axis of the positioning pin 5 coincides with the central axis of the target rotating shaft B1. The flexible coupling 6 can be an existing corrugated coupling. It should be explained that the flexible coupling 6 has a first connecting port and a second connecting port located at both ends, respectively, for connecting between the input shaft 41 and the positioning pin 5. The first connecting port can be sleeved on the input shaft 41, and the second connecting port can be sleeved on the positioning pin 5, so that the input shaft 41 and the positioning pin 5 can rotate synchronously through the connection of the flexible coupling 6. In use, the locating pin 5 rotates synchronously with the target rotating shaft B1, and the locating pin 5 drives the input shaft 41 to rotate through the flexible coupling 6, thereby measuring the rotation angle of the target rotating shaft B1 through the angle sensor 4. It should be further explained that the flexible coupling 6 has a bellows-shaped compression section that compensates for axial misalignment, located in the middle between the first and second connection ports. Since the bellows-shaped coupling is prior art, its more specific structure will not be described in detail.

[0040] In one embodiment, in order to make the overall structure of the angle sensing device on the rock drilling rig of this application more compact, a relief groove can be opened at the end of the target rotating shaft B1, and a positioning pin 5 can be embedded in the bottom of the relief groove, so that the relief groove can accommodate the flexible coupling 6, thereby shortening the installation space in the axial direction.

[0041] Furthermore, refer to Figure 2 As shown, in some embodiments, the adapter hole 30 includes: a first receiving cavity 301, disposed on the side of the adapter 3 near the mounting base 1, the first receiving cavity 301 being used to receive the end of the target rotating shaft B1; and a second receiving cavity 302, disposed on the side of the first receiving cavity 301 away from the mounting base 1 and communicating with the first receiving cavity 301, the second receiving cavity 302 being used to receive the input shaft 41.

[0042] Furthermore, refer to Figure 2 As shown, in some embodiments, the radial dimension of the first receiving cavity 301 is larger than the radial dimension of the second receiving cavity 302.

[0043] Furthermore, refer to Figure 2 As shown, in some embodiments, it further includes: a first sealing ring 7, disposed in the first receiving cavity 301, the first sealing ring 7 being arranged around the target rotating shaft B1, for sealing the installation gap between the adapter 3 and the target rotating shaft B1.

[0044] Specifically, in the technical solution adopted in this application, since the radial dimension of the first receiving cavity 301 is larger than that of the second receiving cavity 302, a support position for the angle mounting seat 1 can be formed on the side of the adapter 3 away from the mounting seat 1. This support position can be arranged around the second receiving cavity 302 to facilitate the assembly of the angle sensor 4 onto the adapter 3 and the insertion of the input shaft 41 of the angle sensor 4 into the first receiving cavity 301. The first receiving cavity 301 is used to adapt the target rotating shaft B1, while the second receiving cavity 302 is used to accommodate the input shaft 41 of the angle sensor 4. The target rotating shaft B1 can be extended into the first receiving cavity 301, and a first sealing ring 7 is arranged in the first receiving cavity 301 to effectively prevent unknown liquids or other particulate impurities from entering through the first receiving cavity 301 and affecting the accuracy of the angle sensor 4. It can be explained that when an unknown liquid or other particulate matter enters the installation gap between the mounting base 1 and the adapter base 3, it is blocked by the first sealing ring 7 and thus cannot contact the input shaft 41 of the angle sensor 4, the flexible coupling 6, or the positioning pin 5.

[0045] Furthermore, refer to Figure 2 As shown, in some embodiments, it further includes: a second sealing ring 8, disposed between the adapter 3 and the angle sensor 4, and the second sealing ring 8 surrounds the second receiving cavity 302 to close the installation gap between the adapter 3 and the angle sensor 4.

[0046] Specifically, in the technical solution adopted in this application, the second sealing ring 8 can effectively prevent unidentified liquids or other particulate impurities from entering through the second receiving cavity 302 and affecting the accuracy of the angle sensor 4. This can be explained as follows: after being blocked by the second sealing ring 8, unidentified liquids or other particulate impurities cannot enter the installation gap between the angle sensor 4 and the adapter 3, and therefore cannot contact the input shaft 41 of the angle sensor 4, the flexible coupling 6, or the positioning pin 5 through the second receiving cavity 302.

[0047] Furthermore, refer to Figure 1 As shown, in some embodiments, it also includes: a sheath component 9, mounted on the angle sensor 4, for covering the angle sensor 4.

[0048] Specifically, in the technical solution adopted in this application, the protective sleeve component 9 can ensure that the angle sensor 4 is not directly impacted by falling foreign objects, thereby protecting the angle sensor 4 and extending its service life.

[0049] Furthermore, refer to Figure 1 As shown, in some embodiments, the sheath component 9 is configured as a U-shaped structure so that it can be upside down onto the angle sensor 4.

[0050] Furthermore, refer to Figure 2 As shown, in some embodiments, the inner wall of the sheath component 9 is also provided with a ring-shaped pressure sleeve 91; the angle sensor 4 is also provided with a signal line 42, which is bent and inserted into the pressure sleeve 91 so as to fix the signal line 42 by the pressure sleeve 91 in a pressing manner.

[0051] Specifically, in the technical solution adopted in this application, a U-shaped sheath component 9 is preferably used and is inverted and fastened onto the angle sensor 4 to achieve the purpose of protection. A wire clamping sleeve 91 can also be provided on the inner wall of the sheath component 9. After the signal line 42 is bent, it can pass through the wire clamping sleeve 91 from one side of the sheath component 9 and then exit from the other side of the sheath component 9. Finally, a bolt is used to pass through the sheath component 9 and lock it onto the angle sensor 4 at the position corresponding to the wire clamping sleeve 91. In use, the bolt can be tightened so that the wire clamping sleeve 91 presses against the signal line 42, so that the root position of the signal line 42 connected to the angle sensor 4 will not be damaged even when the outer end of the signal line 42 vibrates for a long time. This avoids the situation where the root of the signal line 42 is severely worn and the angle sensor 4 needs to be replaced frequently.

[0052] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0053] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0054] Any process or method description in the flowchart or otherwise herein can be understood as representing a module, segment, or portion of code comprising one or more executable instructions for implementing a particular logical function or process. Furthermore, the scope of the preferred embodiments of this application includes additional implementations in which functions may be performed not in the order shown or discussed, including substantially simultaneously or in reverse order depending on the functionality involved.

[0055] The logic and / or steps represented in the flowchart or otherwise described herein, for example, can be considered as a sequenced list of executable instructions for implementing logical functions, and can be embodied in any computer-readable medium for use by, or in conjunction with, an instruction execution system, apparatus or device (such as a computer-based system, a processor-included system or other system that can fetch and execute instructions from, an instruction execution system, apparatus or device).

[0056] It should be understood that various parts of this application can be implemented using hardware, software, firmware, or a combination thereof. In the above embodiments, multiple steps or methods can be implemented using software or firmware stored in memory and executed by a suitable instruction execution system. All or part of the steps of the methods in the above embodiments can be implemented by a program instructing related hardware, the program being stored in a computer-readable storage medium, which, when executed, includes one or a combination of the steps of the method embodiments.

[0057] Furthermore, the functional units in the various embodiments of this application can be integrated into a processing module, or each unit can exist physically separately, or two or more units can be integrated into a module. The integrated module can be implemented in hardware or as a software functional module. If the integrated module is implemented as a software functional module and sold or used as an independent product, it can also be stored in a computer-readable storage medium. This storage medium can be a read-only memory, a disk, or an optical disk, etc.

[0058] The above description is merely a specific embodiment of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A special angle sensing device for a jumbo, for measuring the angle of rotation of a target axis of rotation on the jumbo, characterized in that include: A mounting base is provided for mounting on a rotating shaft seat of the target rotating shaft, and the mounting base is provided with a central hole; A shaft assembly is disposed within the central hole, through which the target rotating shaft can be sleeved within the central hole, and the target rotating shaft can rotate within the central hole based on the mounting base via the shaft assembly; An adapter is mounted on the mounting base along the axial direction of the target rotation axis. The adapter has an adapter hole that communicates with the center hole. An angle sensor is installed on the side of the adapter away from the mounting base. The angle sensor has an input shaft corresponding to the adapter hole, and the central axis of the input shaft can coincide with the central axis of the target rotation shaft. as well as, An auxiliary connection component is provided, through which the input shaft can be connected to the target rotation shaft, so that the input shaft of the angle sensor can rotate synchronously with the target rotation shaft, and the auxiliary connection component has an elastic compression function along the axial direction of the input shaft.

2. A special angle sensing device for a jumbo as claimed in claim 1, characterized in that, The auxiliary connection component includes: A locating pin is used to be fitted into the end of the target rotating shaft; A flexible coupling has a first connection port and a second connection port, and a compression part capable of compression or springback is provided between the first connection port and the second connection port. The first connection port is sleeved on the input shaft, and the second connection port is sleeved on the positioning pin, so that the compression part can adapt to different distances between the input shaft and the target rotation shaft.

3. A special angle sensing device for a jumbo, according to claim 1 or 2, characterized in that, The adapter hole includes: A first receiving cavity is disposed on the side of the adapter near the mounting base, and the first receiving cavity is used to receive the end of the target rotating shaft; The second receiving cavity is located on the side of the first receiving cavity opposite to the mounting base and communicates with the first receiving cavity. The second receiving cavity is used to receive the input shaft.

4. The angle sensing device for a rock drilling rig according to claim 3, characterized in that, The radial dimension of the first receiving cavity is greater than the radial dimension of the second receiving cavity.

5. An angle sensing device for a jumbo as claimed in claim 3, wherein, Also includes: A first sealing ring is disposed in the first receiving cavity. The first sealing ring is arranged around the target rotation axis and is used to seal the installation gap between the adapter and the target rotation axis.

6. An angle sensing device for a jumbo as claimed in claim 3, characterised in that, Also includes: A second sealing ring is disposed between the adapter and the angle sensor, and the second sealing ring surrounds the second receiving cavity to seal the installation gap between the adapter and the angle sensor.

7. An angle sensing device for a jumbo as claimed in claim 1, characterised in that, Also includes: A protective sleeve component is mounted on the angle sensor to cover the angle sensor.

8. The angle sensing device for a rock drilling rig according to claim 7, characterized in that, The sheath component is configured with a U-shaped structure so that it can be inverted and attached to the angle sensor.

9. A special angle sensing device for a rock drilling rig according to claim 8, characterized in that, The inner wall of the sheath component is also provided with a ring-shaped pressure line sleeve; The angle sensor is further provided with a signal line, which is bent and inserted into the pressure line rubber sleeve to fix the signal line in the pressure line rubber sleeve in a compressed manner.

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