Electric drilling box for coal mine anchor rod drilling machine

Abstract

The invention relates to the technical field of coal mine underground anchor rod supporting equipment, and particularly discloses an electric drill box for a coal mine anchor rod drilling machine, which comprises an electric control drill bushing, a second planetary reducer, a drill box support, a first planetary reducer, a transmission shaft and a driving motor, a rotor of the driving motor is connected with the first planetary reducer; the electric control drill bushing comprises a fixed shell, a shell end cover, a bearing assembly, a sealing assembly, a self-lubricating supporting ring and a drill bushing assembly. The drill bushing assembly comprises an input shaft, a supporting shell, a shell end cover, a drill bushing motor stator, a drill bushing motor rotor, a pressing ring, a reset spring, an output pressing block and a pressing block pin. The underground narrow space can be utilized to the maximum extent, the length of a single-section drill rod is increased, the rod connecting frequency is reduced, and the drilling efficiency is improved.

Description

Technical Field

[0001] The invention specifically relates to the technical field of coal mine underground anchor support equipment, in particular to an electric drill box for a coal mine anchor drill. Background Art

[0002] With the continuous improvement of the intelligence level of coal mines and the continuous promotion of technologies such as intelligent rapid excavation, the speed of mine excavation has been greatly improved, and the level of intelligent excavation has also been greatly improved. As one of the construction processes that consumes the longest man-hours in the excavation process, bolt support construction has reduced the impact of bolt support construction on the efficiency of tunnel excavation to a certain extent by adopting a large number of bolt drills in parallel and some bolts lagging support. However, with the use of a large number of bolt drills, the contradiction between the small number of people and the large number of equipment to be operated in coal mines has become prominent. Some coal mine underground excavation teams have repeatedly encountered the problem of a large number of equipment and a serious shortage of operators.

[0003] Anchor drilling rigs are the most widely used equipment in a complete set of rapid excavation equipment. In some rapid excavation equipment, in a single system, the number of anchor drilling rigs can reach more than 12. Generally, due to the limitation of work stations, some drilling rigs can be operated by one person at two times, but most drilling rigs can only be operated by one person at one time, resulting in a large number of people required for anchor operation, and the labor intensity of some people operating two drilling rigs at the same time is too high.

[0004] In addition, the existing anchor drills for coal mines are mainly divided into two categories: pneumatic and hydraulic. Pneumatic anchor drills are mainly single-body anchor drills, which have the advantages of light weight, convenient and flexible movement, but because of the slow construction speed, they are obsolete models in fast tunneling tunnels, and are only used in individual mines to supplement the anchors in individual positions. Hydraulic anchor drills are the mainstream anchor drill models currently installed on complete equipment such as tunneling machines and anchor boring machines. Generally, the whole machine adopts full hydraulic action, and some models have added functions such as electro-hydraulic control, which can reduce the labor intensity of workers to a certain extent. However, due to the characteristics that various parameters in hydraulic transmission are not easy to accurately measure and control, it is difficult for hydraulic anchor drills to improve their control level. Even if the anchor drill with an electro-hydraulic control system is added, it is basically mainly operated manually and frequently underground, and it is difficult to automatically control and realize the automation of anchor construction.

[0005] The drill box is the most important core component of the anchor drilling rig. In pneumatic anchor drilling rigs and hydraulic anchor drilling rigs, pneumatic drill boxes and hydraulic drill boxes are mainly used respectively. When the above-mentioned pneumatic and hydraulic powered drill boxes are applied to automatic anchor drilling rigs, due to the limitations of the drill box power source and its structure, there are the following problems: 1. It is difficult to control the hydraulic drill box and the gas drill box in real time, and the drilling parameters cannot be adjusted in real time according to the drilling status; 2. Due to the structural limitations of the drill box, the drill rod can only be installed from one side of the drill box, and the rod connection process is more complicated. At the same time, the drill box is relatively long, which will affect the single available drill rod length. When the tunnel is low, it has a greater impact on the drilling efficiency; 3. The drill rod connection hole in the drill sleeve is a fixed structure, and the drill sleeve components must be replaced when using different drill rods. Summary of the invention

[0006] The object of the present invention is to provide an electric drill box for a coal mine anchor drill to solve the problems raised in the above-mentioned background technology.

[0007] To achieve the above object, the present invention provides the following technical solutions: An electric drill box for a coal mine anchor drill, comprising an electric drill sleeve, a second planetary reducer, a drill box support, a first planetary reducer, a transmission shaft and a drive motor, wherein the stator of the drive motor is fixedly installed in the drill box support, and the rotor of the drive motor is connected to the first planetary reducer; both ends of the transmission shaft are processed with external splines, the outer diameter of the transmission shaft is smaller than the inner hole diameter of the main shaft of the drive motor, the inner diameter of the transmission shaft is larger than the circumscribed circle diameter of the maximum specification drill rod that the electric drill sleeve can adapt to, and one end of the transmission shaft is matched with the spline of the planetary carrier output shaft of the first planetary reducer, and the other end is matched with the input spline hole of the sun gear of the second planetary reducer; The electric-controlled drill sleeve includes a fixed shell, a shell end cover, a bearing assembly, a sealing assembly, a self-lubricating support ring and a drill sleeve assembly; the drill sleeve assembly includes an input shaft, a support shell, a shell end cover, a drill sleeve motor stator, a drill sleeve motor rotor, a pressure ring, a return spring, an output pressure block and a pressure block pin.

[0008] As a further solution of the present invention: the two ends of the drill box support are respectively connected to the first planetary reducer and the second planetary reducer, and the middle part of the outer side of the drill box support is welded and processed to form a slider; the first planetary reducer is installed at the bottom of the drill box support, and the first planetary reducer adopts a planetary carrier to output power outward, and the planetary carrier output shaft of the first planetary reducer is processed with splines, and the planetary carrier of the first planetary reducer is connected with the transmission shaft through the splines in the output shaft.

[0009] As a further solution of the present invention: one end of the second planetary reducer is connected to the drill box support, and the other end is provided with a shell, which is connected to the outer shell of the electric control drill sleeve through fine machining, and the shell is provided with a mounting surface of the electric control drill sleeve thrust bearing. The second planetary reducer includes a sun gear for input and a planetary carrier for output. The planetary carrier output shaft of the second planetary reducer is a hollow structure. The inner diameter of the planetary carrier output shaft is larger than the inner hole diameter of the transmission shaft. The outer surface of the planetary carrier output shaft is processed with splines for matching with the input shaft hole of the electric control drill sleeve.

[0010] As a further solution of the present invention: the fixed shell is used to support the drill sleeve assembly, and the drill sleeve assembly is supported inside the fixed shell through a bearing. The end of the fixed shell is processed with a flange for connecting to the output end housing of the second planetary reducer, and the inner surface of the fixed shell is processed with a mounting surface of the outer ring of the needle bearing; the shell end cover is connected to the end face of the fixed shell, and the inner hole of the shell end cover forms a seal at the output shaft position of the shell end cover of the drill sleeve assembly through a sealing assembly, and a self-lubricating support ring is installed between the end faces of the shell end cover and the shell end cover.

[0011] As a further solution of the present invention: the bearing assembly consists of a pair of thrust bearings and a pair of needle roller bearings, the inner ring of the needle roller bearing is installed on the outer surface of the supporting shell of the drill sleeve assembly, and the outer ring of the needle roller bearing is installed on the inner surface of the fixed shell; one end of the thrust bearing is installed on the output end shell of the second planetary reducer, and the other end of the thrust bearing is installed on the end face of the input shaft of the drill sleeve assembly.

[0012] As a further solution of the present invention: the input shaft, the support shell and the shell end cover are fixedly connected into a whole, the end of the input shaft is connected to the support shell, the inside of the axial hole of the input shaft is processed with splines for matching with the splines of the planetary carrier output shaft of the second planetary reducer, and the outer cylindrical surface and end face of the input shaft match with the thrust bearing.

[0013] As a further solution of the present invention: the shell end cover is connected to the supporting shell, and the inner outer cylindrical surface of the shell end cover is processed with an external thread, and the thread is a fine thread, which cooperates with the internal thread of the pressure ring; the outer surface of the supporting shell is processed with a bearing mounting surface, and the inner surface of the supporting shell is tightly matched with the outer surface of the drill sleeve motor stator, and a mounting plate is provided inside the supporting shell, and the mounting plate is processed with a pressure block pin mounting hole and a sliding groove for the spring mounting rod of the output pressure block.

[0014] As a further solution of the present invention: the drill sleeve motor stator is installed on the inner surface of the support shell, and is tightly matched and fixed with the inner surface of the support shell; the drill sleeve motor rotor is coaxially installed in the inner hole of the stator, and the inner hole of the drill sleeve motor rotor is a regular polygon, which is used to match with the regular polygon after the outer circle of the pressure ring is processed. During the rotation of the drill sleeve motor rotor, the pressure ring is driven to rotate flexibly along the thread that matches with the shell end cover.

[0015] As a further solution of the present invention: the inner surface of the pressure ring is processed into a regular polygon, which matches the regular polygon of the inner hole of the drill sleeve motor rotor, and the inner surface of the lower end of the pressure ring is processed into a smooth conical surface; the reset spring is a tension spring, a total of six pieces, one end of which is installed on the support shell, and the other end is connected to the spring mounting rod of the output pressure block, which is used to ensure the timely reset of the output pressure block; the output pressure block is made of high-strength steel, a total of six pieces, and is hingedly installed in the space formed by the support shell and the shell end cover through a pressure block pin.

[0016] As a further solution of the present invention: the outer side of the output pressure block has a conical surface, and after the pressure ring rotates downward, the output pressure blocks swing toward the central axis at the same time, so that the size of the regular hexagonal hole composed of the six output pressure blocks is reduced; after the pressure ring rises, the output pressure block is reset under the action of the spring, so that the regular hexagonal hole is adjusted to increase.

[0017] Compared with the prior art, the present invention has the following beneficial effects: 1. The drill box uses an electric motor as the driving device, and the main shaft of the motor adopts a hollow structure. When working, the drill rod can pass through the drill box. When working in the narrow space underground in the coal mine, the narrow space underground can be used to the maximum extent, the length of a single drill rod can be increased, the number of rod connections can be reduced, and the drilling efficiency can be improved.

[0018] 2. The drill box is installed with an electric-controlled drill sleeve, and the opening and closing status of the drill sleeve can be adjusted in time according to work needs. It is convenient to cooperate with the drill clamping mechanism of the coal mine anchor drilling rig, and the relative position of the drill box and the drill rod can be adjusted in time. At the same time, it is used in conjunction with the hollow structure of the drill box to facilitate the connection of the drill rod from the tail of the drill box.

[0019] 3. The hole size of the electric-controlled drill sleeve can be adjusted electrically, which is suitable for different types of hexagonal drill rods and is easy to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 This is a schematic diagram of the structure of an electric drill box for a coal mine anchor drill.

[0021] Figure 2 This is a structural cross-section diagram of an electric drill box for a coal mine anchor drill.

[0022] Figure 3 This is a structural cross-sectional view of the electric-controlled drill sleeve in the electric drill box for coal mine anchor drilling rigs.

[0023] Figure 4 The structure diagram of the drill sleeve assembly in the electric drill box for coal mine anchor drilling rig Figure 1 .

[0024] Figure 5 The structure diagram of the drill sleeve assembly in the electric drill box for coal mine anchor drilling rig Figure 2 .

[0025] Figure 6 This is a schematic diagram of the structure of the output pressing block in the electric drill box for coal mine anchor drilling rigs. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] See also Figure 1-Figure 6 In an embodiment of the present invention, an electric drill box for a coal mine anchor drill comprises an electric-controlled drill sleeve 1, a second planetary reducer 2, a drill box support 3, a first planetary reducer 4, a transmission shaft 5 and a drive motor 6. In this embodiment, the electrical control of the electric drill box 1 is provided by the host computer; The drive motor 6 adopts a high-speed motor, the stator of the drive motor 6 is fixedly installed in the drill box support 3, the rotor of the drive motor 6 adopts a hollow structure, and the rotor of the drive motor 6 is connected to the first planetary reducer 4. The motor control system can monitor the input parameters of the motor in real time, and can adjust the motor input parameters in real time according to the parameter requirements during drilling.

[0028] The drill box support 3 is the main supporting structure of the electric drill box. The two ends of the drill box support 3 are respectively connected to the first planetary reducer 4 and the second planetary reducer 2. A slider is welded and processed in the middle of the outer side of the drill box support 3. The slider is used to install the guide on the drilling rig and withstand the overturning moment during drilling; the first planetary reducer 4 is installed at the bottom of the drill box support 3, and the first planetary reducer 4 uses a planetary carrier to output power outward. The planetary carrier output shaft of the first planetary reducer 4 is processed with splines, and the planetary carrier of the first planetary reducer 4 is connected with the transmission shaft 5 through the splines in the output shaft.

[0029] The transmission shaft 5 is a hollow structure, and both ends of the transmission shaft 5 are processed with external splines. The outer diameter of the transmission shaft 5 is smaller than the inner hole diameter of the main shaft of the driving motor 6, and the inner diameter of the transmission shaft 5 is larger than the circumscribed circle diameter of the maximum specification drill rod that the electric control drill sleeve 1 can adapt to. One end of the transmission shaft 5 cooperates with the spline of the planetary carrier output shaft of the first planetary reducer 4, and the other end cooperates with the input spline hole of the sun gear of the second planetary reducer 2.

[0030] One end of the second planetary reducer 2 is connected to the drill box support 3, and the other end is provided with a shell, which is connected to the outer shell of the electric control drill sleeve 1 through fine machining. At the same time, the shell is processed with a mounting surface for the thrust bearing of the electric control drill sleeve 1. The second planetary reducer 2 includes a sun gear for input and a planetary carrier for output. The planetary carrier output shaft of the second planetary reducer 2 is a hollow structure. The inner diameter of the planetary carrier output shaft is larger than the inner hole diameter of the transmission shaft 5. The outer surface of the planetary carrier output shaft is processed with splines for matching with the input shaft hole of the electric control drill sleeve 1.

[0031] The electric control drill sleeve 1 is fixedly mounted on the output end housing of the second planetary reducer 2, and the input shaft of the electric control drill sleeve 1 is splined with the output shaft of the second planetary reducer 2. The electric control drill sleeve 1 includes a fixed housing 11, a housing end cover 12, a bearing assembly 13, a sealing assembly 14, a self-lubricating support ring 15 and a drill sleeve assembly 16, wherein: The fixed housing 11 is used to support the drill sleeve assembly 16, and the drill sleeve assembly 16 is supported inside the fixed housing 11 through a bearing. The fixed housing 11 is a steel cylindrical structure with a flange processed at the end for connecting the output end housing of the second planetary reducer 2. The inner surface of the fixed housing 11 is processed with a mounting surface of the outer ring of the needle bearing; the housing end cover 12 is connected to the end face of the fixed housing 11, and the inner hole of the housing end cover 12 forms a seal at the output shaft position of the housing end cover 163 of the drill sleeve assembly 16 through a sealing assembly 14. A self-lubricating support ring 15 is installed between the end faces of the housing end cover 12 and the housing end cover 163. The self-lubricating support ring 15 is used to support the drill sleeve assembly when withdrawing the drill to prevent excessive axial displacement; The bearing assembly 13 is composed of a pair of thrust bearings and a pair of needle bearings, which are used to support the axial and radial movement of the drill sleeve assembly respectively; the inner ring of the needle bearing is installed on the outer surface of the supporting shell of the drill sleeve assembly 16, and the outer ring of the needle bearing is installed on the inner surface of the fixed shell 11; one end of the thrust bearing is installed on the output end shell of the second planetary reducer 2, and the other end of the thrust bearing is installed on the input shaft end face of the drill sleeve assembly 16.

[0032] Further, in the embodiment of the present application, the drill sleeve assembly 16 includes an input shaft 161, a support housing 162, a housing end cover 163, a drill sleeve motor stator 164, a drill sleeve motor rotor 165, a pressure ring 166, a return spring 167, an output pressure block 168 and a pressure block pin 169, wherein: The input shaft 161, the support housing 162 and the housing end cover 163 are fixedly connected as a whole, the end of the input shaft 161 is connected to the support housing 162, the shaft hole of the input shaft 161 is processed with splines for matching with the splines of the planetary carrier output shaft of the second planetary reducer 2, and the outer cylindrical surface and end face of the input shaft 161 are processed to match with the thrust bearing.

[0033] The shell end cover 163 is connected to the support shell 162, and the inner outer cylindrical surface of the shell end cover 163 is processed with an external thread, and the thread is a fine thread, which cooperates with the internal thread of the pressure ring 166; the outer surface of the support shell 162 is processed with a bearing mounting surface, and the inner surface of the support shell 162 is tightly matched with the outer surface of the drill sleeve motor stator 164. A mounting plate is provided inside the support shell 162, and the inner surface of the mounting plate is processed smoothly, and is processed with a mounting hole for the pressure block pin 169 and a sliding groove for the spring mounting rod of the output pressure block 168.

[0034] The drill sleeve motor stator 164 is installed on the inner surface of the support shell 162, and is tightly matched and fixed with the inner surface of the support shell 162; the drill sleeve motor rotor 165 is coaxially installed in the inner hole of the stator and can rotate flexibly after installation. The inner hole of the drill sleeve motor rotor 165 is a regular polygon, which is used to match with the regular polygon after the outer circle of the pressure ring 166 is processed. During the rotation of the drill sleeve motor rotor 165, the pressure ring 166 is driven to rotate flexibly along the thread matching with the shell end cover 163.

[0035] The pressure ring 166 is made of high-strength copper material, and its outer surface is processed with fine-pitch threads for cooperating with the shell end cover 163. It can be flexibly rotated to achieve movement along the axis of the thread. The inner surface of the pressure ring 166 is processed into a regular polygon to cooperate with the regular polygon of the inner hole of the drill sleeve motor rotor 165. The inner surface of the lower end of the pressure ring 166 is processed into a smooth conical surface; the reset spring 167 is a tension spring, a total of six pieces, one end of which is installed on the support shell 162, and the other end is connected to the spring mounting rod of the output pressure block 168, which is used to ensure the timely reset of the output pressure block 166; the output pressure block 168 is made of high-strength steel, a total of six pieces, and is hingedly installed on the support shell 162 and the shell end cover through the pressure block pin 169 In the space formed by 163, after installation, the output pressure block 168 can swing flexibly along the pressure block pin 169, and the six output pressure blocks 168 are evenly arranged in the hole. After installation, the working surfaces of the six output pressure blocks 168 are combined into a regular hexagonal hole; the outer side of the output pressure block 168 has a longer cone surface, and after the pressure ring 166 rotates downward, the output pressure blocks 168 can swing toward the central axis at the same time, so that the size of the regular hexagonal hole composed of the six output pressure blocks 168 is reduced; after the pressure ring 166 rises, the output pressure block 168 can be reset under the action of the spring, so that the regular hexagonal hole can be adjusted to increase, and the working surface of the output pressure block 168 is machined with a series of smaller teeth and quenched, and has higher hardness and toughness.

[0036] In an embodiment of the present application, a method for using an electric drill box for a coal mine anchor drill comprises the following steps: S101, inserting the drill rod: In the initial state, the rotary pressure ring 166 is raised to the highest position, and the output pressure block 168 is at the maximum position of the drill sleeve output shaft under the action of the return spring 167; from the drill sleeve direction of the electric drill box, the drill rod is inserted into the electric control drill sleeve 1, and the tail of the drill rod passes through the output pressure block 168 area in the electric control drill sleeve; The electrical control system supplies power to the drill sleeve motor of the electric-controlled drill sleeve 1, and the drill sleeve motor rotor 165 rotates, driving the pressure ring 166 to move downward, and the working surface of the output pressure block 168 swings inward, and the drill sleeve hole shrinks until the drill sleeve hole contacts the drill rod until the drill sleeve hole can no longer shrink, and then power is continuously supplied to the drill sleeve motor to maintain the output torque of the motor; The electric drill box drives the drill rod to start rotating and rising, and slowly starts drilling construction; under the action of external load during drilling construction, the drill rod and the drill sleeve hole that initially shrinks and clamps the drill rod rotate relative to each other, and the drill sleeve hole further shrinks in real time under the action of the drill sleeve motor to achieve drill rod clamping.

[0037] S102, taking out the drill rod: the electrical control system supplies power to the drill sleeve motor, the drill sleeve motor rotor 165 rotates, driving the pressure ring 166 to move upward, and the output pressure block 168 swings outward under the action of the return spring 167, the drill sleeve hole becomes larger, and the drill rod is taken out.

[0038] S103, drilling: supply power to the drill box drive motor, drive the drill sleeve to drive the drill rod to rotate at the set output speed, and monitor the output speed of the motor in real time to achieve drilling. During the drilling process, the electrical system can control the output parameters of the drill box drive motor.

[0039] It will be apparent to those skilled in the art that the invention is not limited to the details of the exemplary embodiments described above and that the invention can be implemented in other specific forms without departing from the spirit or essential features of the invention. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of the invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations falling within the meaning and scope of the equivalent elements of the claims be included in the invention. Any reference numeral in a claim should not be considered as limiting the claim to which it relates.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. An electric drill box for a coal mine anchor drill, characterized in that: The invention comprises an electric-controlled drill sleeve (1), a second planetary reducer (2), a drill box support (3), a first planetary reducer (4), a transmission shaft (5) and a drive motor (6), wherein the stator of the drive motor (6) is fixedly installed in the drill box support (3), and the rotor of the drive motor (6) is connected to the first planetary reducer (4); both ends of the transmission shaft (5) are processed with external splines, the outer diameter of the transmission shaft (5) is smaller than the inner diameter of the main shaft of the drive motor (6), the inner diameter of the transmission shaft (5) is larger than the circumscribed circle diameter of the maximum specification drill rod that the electric-controlled drill sleeve (1) can adapt to, and one end of the transmission shaft (5) is matched with the spline of the planetary carrier output shaft of the first planetary reducer (4), and the other end is matched with the input spline hole of the sun gear of the second planetary reducer (2); The electric-controlled drill sleeve (1) comprises a fixed housing (11), a housing end cover (12), a bearing assembly (13), a sealing assembly (14), a self-lubricating support ring (15) and a drill sleeve assembly (16); the drill sleeve assembly (16) comprises an input shaft (161), a support housing (162), a housing end cover (163), a drill sleeve motor stator (164), a drill sleeve motor rotor (165), a pressure ring (166), a return spring (167), an output pressure block (168) and a pressure block pin (169).

2. The electric drill box for coal mine bolt drill according to claim 1, characterized in that: The two ends of the drill box support (3) are respectively connected to the first planetary reducer (4) and the second planetary reducer (2), and a sliding block is welded and processed in the middle of the outer side of the drill box support (3); the first planetary reducer (4) is installed at the bottom of the drill box support (3), and the first planetary reducer (4) uses a planetary carrier to output power outwards, and the output shaft of the planetary carrier of the first planetary reducer (4) is processed with splines, and the planetary carrier of the first planetary reducer (4) is connected with the transmission shaft (5) through the splines in the output shaft.

3. The electric drill box for coal mine anchor drilling machine according to claim 2, characterized in that: One end of the second planetary reducer (2) is connected to the drill box support (3), and the other end is provided with a shell, which is connected to the outer shell of the electric control drill sleeve (1) through fine processing, and the shell is processed with a mounting surface for the thrust bearing of the electric control drill sleeve (1). The second planetary reducer (2) includes a sun gear for input and a planetary carrier for output. The output shaft of the planetary carrier of the second planetary reducer (2) is a hollow structure, and the inner diameter of the output shaft of the planetary carrier is larger than the inner hole diameter of the transmission shaft (5). The outer surface of the output shaft of the planetary carrier is processed with splines for matching with the input shaft hole of the electric control drill sleeve (1).

4. The electric drill box for coal mine bolt drill according to claim 1, characterized in that: The fixed housing (11) is used to support the drill sleeve assembly (16). The drill sleeve assembly (16) is supported inside the fixed housing (11) via a bearing. A flange is machined at the end of the fixed housing (11) for connecting to the output end housing of the second planetary reducer (2). The inner surface of the fixed housing (11) is machined with a mounting surface for the outer ring of a needle bearing. The housing end cover (12) is connected to the end surface of the fixed housing (11). The inner hole of the housing end cover (12) forms a seal at the output shaft position of the housing end cover (163) of the drill sleeve assembly (16) via a sealing assembly (14). A self-lubricating support ring (15) is installed between the end surfaces of the housing end cover (12) and the housing end cover (163).

5. The electric drill box for coal mine bolt drill according to claim 4, characterized in that: The bearing assembly (13) is composed of a pair of thrust bearings and a pair of needle roller bearings. The inner ring of the needle roller bearing is mounted on the outer surface of the supporting shell of the drill sleeve assembly (16), and the outer ring of the needle roller bearing is mounted on the inner surface of the fixed shell (11); one end of the thrust bearing is mounted on the output end shell of the second planetary reducer (2), and the other end of the thrust bearing is mounted on the input shaft end face of the drill sleeve assembly (16).

6. The electric drill box for coal mine bolt drill according to claim 1, characterized in that: The input shaft (161), the support housing (162) and the housing end cover (163) are fixedly connected to form an integral body; the end of the input shaft (161) is connected to the support housing (162); a spline is machined inside the shaft hole of the input shaft (161) for mating with the spline of the planetary carrier output shaft of the second planetary reducer (2); and the outer cylindrical surface and end face of the input shaft (161) are mated with the thrust bearing.

7. The electric drill box for coal mine bolt drill according to claim 6, characterized in that: The shell end cover (163) is connected to the support shell (162), and the inner outer cylindrical surface of the shell end cover (163) is processed with an external thread, and the thread is a fine thread, which cooperates with the internal thread of the pressure ring (166); the outer surface of the support shell (162) is processed with a bearing mounting surface, and the inner surface of the support shell (162) is tightly matched with the outer surface of the drill sleeve motor stator (164), and a mounting plate is provided inside the support shell (162), and the mounting plate is processed with a mounting hole for the pressure block pin (169) and a sliding groove for the spring mounting rod of the output pressure block (168).

8. The electric drill box for coal mine bolt drill according to claim 7, characterized in that: The drill sleeve motor stator (164) is installed on the inner surface of the support shell (162) and is tightly matched and fixed with the inner surface of the support shell (162); the drill sleeve motor rotor (165) is coaxially installed in the inner hole of the stator, and the inner hole of the drill sleeve motor rotor (165) is a regular polygon, which is used to match with the regular polygon after the outer circle of the pressure ring (166) is processed. During the rotation of the drill sleeve motor rotor (165), the pressure ring (166) is driven to rotate flexibly along the thread matched with the shell end cover (163).

9. The electric drill box for coal mine bolt drill according to claim 8, characterized in that: The inner surface of the pressure ring (166) is processed into a regular polygon, which matches the inner hole regular polygon of the drill sleeve motor rotor (165), and the inner surface of the lower end of the pressure ring (166) is processed into a smooth conical surface; the reset spring (167) is a tension spring, a total of six pieces, one end of which is installed on the support shell (162), and the other end is connected to the spring mounting rod of the output pressure block (168) to ensure the timely reset of the output pressure block (166); the output pressure block (168) is made of high-strength steel, a total of six pieces, and is hingedly installed in the space formed by the support shell (162) and the shell end cover (163) through the pressure block pin (169).

10. The electric drill box for coal mine bolt drill according to claim 9, characterized in that: The outer side of the output pressing block (168) has a conical surface. When the pressing ring (166) rotates downward, the output pressing block (168) swings toward the central axis at the same time, so that the size of the regular hexagonal hole formed by the six output pressing blocks (168) is reduced; when the pressing ring (166) rises, the output pressing block (168) is reset under the action of the spring, so that the regular hexagonal hole is adjusted to increase.

Images