Automatic feed transmission and switching mechanism of mini horizontal drilling machine

Abstract

The invention provides an automatic feed transmission and switching mechanism of a mini horizontal drilling machine, and relates to the field of horizontal drilling machines, the automatic feed transmission and switching mechanism comprises a drilling machine, a drill bit seat vertically and slidably mounted at the end of the drilling machine, and a lifting shaft horizontally and rotatably mounted in the middle of the drilling machine, and the middle of the lifting shaft is meshed with the drill bit seat through a lifting gear; the automatic cutter feeding mechanism comprises a driving part and a driven gear which are installed at the bottom of the drilling machine, the driven gear is coaxial with the end of the lifting shaft, the output end of the driving part and the driven gear are in transmission through a gear set, and a set of limiting holes are annularly formed in the end of the lifting shaft at equal intervals; balls are installed in the limiting holes in a sliding mode and connected with the inner wall of the driven gear in a matched and clamped mode. According to the mini horizontal drilling machine, automatic mode switching is achieved, manual intervention is not needed, the conversion efficiency and the overall practicability of the mini horizontal drilling machine among different working scenes are greatly improved, and the operation complexity is reduced.

Description

Technical Field

[0001] This invention relates to the field of horizontal drilling machines, and more specifically, to an automatic feed transmission and switching mechanism for a mini horizontal drilling machine. Background Technology

[0002] Horizontal magnetic drill, also known as magnetic drill or magnetic electric drill, is a mobile power tool that uses electromagnetic principles to adhere to the surface of steel parts for drilling. Because its motor and drill bit are arranged in a "horizontal" layout parallel to the workpiece surface, the overall height of the machine is significantly reduced, making it suitable for working in narrow spaces where ordinary vertical equipment cannot enter.

[0003] Currently, most mini horizontal drilling machines on the market use a single feed method. The electric feed mode uses a built-in motor to drive the automatic feed, but the constant mechanical feed lacks the flexibility to respond to initial precise positioning and unexpected situations during cutting (such as uneven material or drill bit jamming). The manual feed mode uses a crank handle to drive the feed, and the operation is entirely dependent on human power. When performing large-volume, continuous drilling operations, the labor intensity of workers is high and the work efficiency is low. At the same time, the uniformity and accuracy of the feed pressure largely depend on the operator's experience, making it difficult to guarantee stable drilling quality. Some models that have the function of switching between electric and manual feed modes occupy a large space and cannot achieve quick, integrated in-situ switching, making it difficult to meet the dual requirements of convenient operation and process adaptability in modern small workshops, model making, and repair scenarios.

[0004] Therefore, we made improvements and proposed an automatic feed transmission and switching mechanism for a mini horizontal drilling machine. Summary of the Invention

[0005] The purpose of this invention is to address the problem that most existing horizontal drilling machines use a single feeding mode, either electric or manual, which has certain limitations in practical applications and limited applicability.

[0006] To achieve the above-mentioned objectives, the present invention provides an automatic feed transmission and switching mechanism for a mini horizontal drilling machine to improve the aforementioned problems.

[0007] The application is as follows: An automatic feed transmission and switching mechanism for a mini horizontal drilling machine includes a drilling rig, a drill bit holder vertically slidably mounted at the end of the drilling rig, and a lifting shaft horizontally rotatably mounted in the middle of the drilling rig. The middle part of the lifting shaft meshes with the drill bit holder via a lifting gear. The mechanism also includes: The automatic feed mechanism includes a drive component and a driven gear installed at the bottom of the drilling rig. The driven gear is coaxial with the end of the lifting shaft. The output end of the drive component is connected to the driven gear through a gear set. The end of the lifting shaft is provided with a set of limiting holes at equal intervals in an annular shape. A ball is slidably installed in the limiting hole. The ball is adapted to engage with the inner wall of the driven gear. The manual feed mechanism includes a crank handle rotatably mounted on one side of the bottom of the drilling rig. The end of the crank handle has a locking block. A slide rail is provided through the middle of the lifting shaft along its axial direction. A connecting rod is slidably mounted in the slide rail. The end of the connecting rod is provided with a slot that matches the locking block. The control switching mechanism includes a control component installed in the slide rail and used to control the linear sliding of the connecting rod. The side wall of the connecting rod is provided with an annular groove. The limiting hole is connected to the slide rail. When the ball falls into the annular groove and separates from the driven gear, the locking block engages with the locking slot.

[0008] As a preferred technical solution of this application, the drilling rig further includes a housing, the lifting shaft is rotatably mounted on the bottom of the housing, the bottom of the housing also has a mounting cavity, the side of the mounting cavity has a mounting groove, the driving component is mounted in the mounting cavity and its output end passes through and extends into the mounting groove, the mounting groove also has a transmission shaft mounted in the mounting groove, the gear set includes a driving gear mounted on the output end of the driving component and a pair of transmission gears mounted on the transmission shaft, one of the transmission gears meshing with the driving gear, and the other transmission gear meshing with the driven gear.

[0009] As a preferred technical solution of this application, a first side cover is adapted to be installed at the outer end of the mounting groove, and the crank handle is rotatably installed on the first side cover.

[0010] As a preferred technical solution of this application, the inner wall of the driven gear is provided with a set of arc-shaped slots at equal intervals in an annular shape. In the automatic feed mode, the outer end of the ball abuts against the inner wall of the arc-shaped slot, and the inner end of the ball abuts against the side wall of the connecting rod.

[0011] As a preferred technical solution of this application, the control component includes an electric telescopic component fixedly installed in the middle of the slide, and an electrical connector fixedly installed on the housing. The electrical connector is rotatably connected to the opposite end of the electric telescopic component, and the output end of the electric telescopic component is fixed to the end of the connecting rod.

[0012] As a preferred technical solution of this application, a second side cover is installed on the side of the housing, the electrical connector is detachably installed inside the second side cover and opposite to the slide rail, there is a gap between the slide rail and the electrical connector, the side of the housing is provided with a connection hole communicating with the mounting cavity, the wire of the electrical connector passes through the connection hole and extends into the mounting cavity and is electrically connected to the control system of the drilling rig along with the drive component.

[0013] As a preferred technical solution of this application, the two sidewalls of the annular groove are arc surfaces that push the ball to move along the limiting hole.

[0014] As a preferred technical solution of this application, the outer end of the connecting rod is integrally formed with a regular prism, the slot is opened at the end of the regular prism, and the end of the lifting shaft is provided with a regular polygonal groove that matches the regular prism.

[0015] As a preferred technical solution of this application, a fixing hole is provided on the lifting shaft, and a fixing groove is provided on the side of the electric telescopic component. Fasteners for fixing the position of the electric telescopic component are installed in the fixing hole and the fixing groove.

[0016] As a preferred technical solution of this application, the side of the drill bit holder is provided with a lifting gear assembly that meshes with the lifting gear.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows: In the scheme of this application: 1. By incorporating an automatic feed mechanism, a manual feed mechanism, and a control switching mechanism on the drilling rig, in automatic feed mode, the electric telescopic component first pulls the connecting rod axially inward, lifting the ball bearing and engaging it with the arc-shaped groove on the driven gear. At this time, the drive component drives the driven gear and the lifting shaft to rotate, achieving automatic feed. In manual feed mode, the electric telescopic component pushes the connecting rod axially outward until the annular groove on the connecting rod is opposite to the ball bearing. The ball bearing is located in the limiting hole of the lifting shaft and the annular groove of the connecting rod. At this time, the ball bearing is completely disengaged from the driven gear. The user only needs to crank the handle to directly drive the lifting shaft to rotate, realizing automated mode switching without manual intervention. This significantly improves the conversion efficiency and overall practicality of the mini horizontal drilling machine in different working scenarios and reduces the complexity of operation.

[0018] 2. By rotating the crank handle on the first side cover, which is fixedly installed on the side of the drilling rig, the crank handle and the drilling rig are integrated for easy transfer, eliminating the need to place the crank handle separately. This improves the practicality of the drilling rig and allows for quick manual feed by the user. The operation is convenient. Furthermore, the connecting rod separates from the locking block on the crank handle when it lifts the ball bearings to engage with the driven gear for automatic feed. This prevents accidental operation of the crank handle by the user in automatic feed mode, thus ensuring the safety of the equipment and the user. Attached Figure Description

[0019] Figure 1 A schematic diagram of the front side of the mini horizontal drilling machine with automatic feed transmission and switching mechanism provided in this application; Figure 2 A schematic diagram of the back structure of the mini horizontal drilling machine with automatic feed transmission and switching mechanism provided in this application; Figure 3 This is a schematic diagram of the bottom of the housing of the automatic feed transmission and switching mechanism of the mini horizontal drilling machine provided in this application; Figure 4 A schematic diagram of the crank handle and the first side cover of the automatic feed transmission and switching mechanism of the mini horizontal drilling machine provided in this application; Figure 5 A schematic diagram showing the separation of the second side cover from the housing of the automatic feed transmission and switching mechanism of the mini horizontal drilling machine provided in this application; Figure 6 A schematic diagram of the installation of the second side cover and electrical connector of the automatic feed transmission and switching mechanism of the mini horizontal drilling machine provided in this application; Figure 7 A schematic diagram showing the separation of the lifting shaft and driven gear in the automatic feed transmission and switching mechanism of the mini horizontal drilling machine provided in this application; Figure 8 A schematic diagram of the internal structure of the lifting shaft of the automatic feed transmission and switching mechanism of the mini horizontal drilling machine provided in this application; Figure 9 This is a schematic diagram showing the connection between the lifting shaft and the drill bit holder of the automatic feed transmission and switching mechanism of the mini horizontal drilling machine provided in this application.

[0020] The image shows: 100. Drilling rig; 101. Drill bit holder; 102. Lifting shaft; 103. Lifting gear; 104. Housing; 105. Mounting cavity; 106. Mounting slot; 107. Lifting gear assembly; 200. Automatic feed mechanism; 201. Driving component; 202. Driven gear; 203. Limiting hole; 204. Ball bearing; 205. Drive shaft; 206. Driving gear; 207. Transmission gear; 208. Arc-shaped groove; 300. Manual feed mechanism; 301. Handle; 302. Locking block; 303. Slide rail; 304. Connecting rod; 305. Slot; 306. First side cover; 307. Regular prism; 308. Regular polygonal slot; 400. Control switching mechanism; 401. Annular groove; 402. Electric telescopic component; 403. Electrical connector; 404. Second side cover; 405. Connecting hole; 406. Arc surface; 407. Fastener. Detailed Implementation

[0021] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the scope of protection of the present invention.

[0022] The present invention will be further described below with reference to embodiments.

[0023] Example: Please refer to Figures 1 to 9 As shown, the automatic feed transmission and switching mechanism of the mini horizontal drilling machine includes a drilling machine 100, a drill bit holder 101 vertically slidably mounted at the end of the drilling machine 100, and a lifting shaft 102 horizontally rotatably mounted in the middle of the drilling machine 100. The drill bit holder 101 is used to mount the drilling tool. The middle part of the lifting shaft 102 meshes with the drill bit holder 101 through a lifting gear 103. The side of the drill bit holder 101 is provided with a lifting gear set 107 that meshes with the lifting gear 103. By manually or electrically driving the lifting shaft 102 to rotate forward and reverse, the drill bit holder 101 can be driven to make corresponding lifting and lowering movements in the vertical direction.

[0024] Please refer to Figure 3 , Figure 7 and Figure 8 As shown, it also includes an automatic feed mechanism 200, which is used to realize electric automatic feed and improve the convenience of user operation. It includes a drive component 201 and a driven gear 202 installed at the bottom of the drilling rig 100. The driven gear 202 is coaxial with the end of the lifting shaft 102. The output end of the drive component 201 is connected to the driven gear 202 through a gear set. The end of the lifting shaft 102 is provided with a set of limiting holes 203 in an annular shape. A ball bearing 204 is slidably installed in the limiting hole 203. The ball bearing 204 is adapted to engage with the inner wall of the driven gear 202. That is, when the ball bearing 204 is located in the limiting hole 203 and engaged with the inner wall of the driven gear 202, the drive component 201 drives the driven gear 202 to rotate. The corresponding driven gear 202 will drive the lifting shaft 102 to rotate through the ball bearing 204. Please refer to Figure 1 , Figure 4 and Figure 7 As shown, it also includes a manual feed mechanism 300, which provides users with more options for manual feed operation and improves the operational flexibility of the drilling rig 100. It includes a crank handle 301 rotatably mounted on one side of the bottom of the drilling rig 100. The end of the crank handle 301 has a locking block 302. A slide rail 303 is provided through the middle of the lifting shaft 102 along its axial direction. A connecting rod 304 is slidably mounted in the slide rail 303. The end of the connecting rod 304 has a slot 305 that matches the locking block 302. The crank handle 301 is rotatably mounted on the drilling rig 100, which is convenient for transfer. There is no need to place the crank handle 301 separately, which improves the practicality of the drilling rig 100 and facilitates quick manual feed operation. When the connecting rod 304 is engaged with the locking block 302 on the crank handle 301, the user can crank the crank handle 301 to manually feed the tool. The operation is quick and convenient. It also includes a control switching mechanism 400, which allows users to select automatic or manual feed mode according to different drilling scenarios. This includes a control component installed in the slide rail 303 to control the linear sliding of the connecting rod 304. The side wall of the connecting rod 304 has an annular groove 401, and the limiting hole 203 is connected to the slide rail 303. When the ball 204 falls into the annular groove 401 and separates from the driven gear 202, the locking block 302 engages with the locking groove 305. Correspondingly, when the ball is lifted and engaged, the locking block 302 separates from the locking groove 305, thus avoiding interference with the operation of the drilling rig 100 caused by the user accidentally touching the rocker arm 301 in the automatic feed mode, and ensuring the safety of the equipment and the user. With the automatic feed mechanism 200, manual feed mechanism 300, and control switching mechanism 400, when the outer end of the ball 204 engages with the driven gear 202, the driven gear 202 and the lifting shaft 102 can rotate synchronously under the drive of the drive component 201, thus achieving the automatic feed function. When the ball 204 retracts into the limiting hole 203 on the lifting shaft 102 and disengages from the driven gear 202, the rotation of the lifting shaft 102 is no longer constrained by the driven gear 202. At this time, the connecting rod 304 and the lifting shaft 102 can be directly driven to rotate by the crank handle 301, thus achieving the manual feed function. Through the combination of the above structures, the adaptability of the mini horizontal drilling machine to different processing scenarios is enhanced, and the operational flexibility and practicality of the mini horizontal drilling machine are improved.

[0025] Furthermore, such as Figure 3As shown, the drilling rig 100 also includes a housing 104, a lifting shaft 102 rotatably mounted on the bottom of the housing 104, a mounting cavity 105 at the bottom of the housing 104, a mounting groove 106 on the side of the mounting cavity 105, a drive unit 201 mounted in the mounting cavity 105 with its output end extending through into the mounting groove 106, the drive unit 201 preferably being a small, low-speed, high-torque DC motor or a stepper motor, a transmission shaft 205 also mounted in the mounting groove 106, and a gear set including an active gear mounted on the output end of the drive unit 201. The wheel 206 and a pair of transmission gears 207 mounted on the transmission shaft 205, one of which meshes with the driving gear 206 and the other meshes with the driven gear 202, can drive the lifting shaft 102 to rotate through the power transmission of the driving gear 206, the two transmission gears 207 and the driven gear 202, thus realizing the function of automatic feed. The automatic and manual feed and switching mechanism is integrated into the bottom of the housing 104, which is compact and saves space, forming a mini drilling machine model.

[0026] Furthermore, such as Figure 1 and Figure 4 As shown, a first side cover 306 is fitted to the outer end of the mounting groove 106, and a crank handle 301 is rotatably mounted on the first side cover 306. In daily use, the crank handle 301 is integrated with the drilling machine 100, avoiding the need for separate storage of the crank handle 301 and facilitating quick manual feed operations for users, thereby improving the convenience and practicality of the drilling machine 100.

[0027] Furthermore, such as Figure 3 and Figure 7 As shown, the inner wall of the driven gear 202 is provided with a set of arc-shaped slots 208 at equal intervals in an annular shape. The cross-sectional profile of the arc-shaped slots 208 is a concave arc that matches the ball 204. In the automatic feed mode, the outer end of the ball 204 abuts against the inner wall of the arc-shaped slots 208, and the inner end of the ball 204 abuts against the side wall of the connecting rod 304. That is, when the driven gear 202 rotates, the ball 204 is squeezed by the inner wall of the arc-shaped slots 208. The ball 204 squeezes the inner wall of the limiting hole 203, which drives the lifting shaft 102 to rotate synchronously. Preferably, the ball 204 is made of high carbon chromium steel to ensure hardness and wear resistance. The rolling friction of the ball 204 is used to achieve engagement and separation, resulting in low wear, fast response, and good force transmission characteristics and durability.

[0028] Furthermore, such as Figure 2 , Figure 5 , Figure 6 and Figure 8As shown, the control component includes an electric telescopic member 402 fixedly installed in the middle of the slide 303, and an electrical connector 403 fixedly installed on the housing 104. The electrical connector 403 and the electric telescopic member 402 are rotatably connected at opposite ends, and the output end of the electric telescopic member 402 is fixed to the end of the connecting rod 304. Preferably, in this application, the electric telescopic component 402 is a miniature linear electric cylinder or an electromagnetic linear actuator, which can accurately position the connecting rod 304 in two fixed positions: "manual position" and "automatic position". The electrical connector 403 is a conductive slip ring. The conductive slip ring is an electromechanical component that solves the problem of continuous and stable transmission of current, signals or data between the fixed structure and the rotating part. By setting the conductive slip ring, the problem of wire winding is avoided, and the electric telescopic component 402 can be stably powered so as to control the relative position between the connecting rod 304, the locking block 302 and the ball 204. Furthermore, the automatic or manual feed mode can be switched via a switch button on the panel of the drilling rig 100. When the "automatic feed" mode is selected, the control system first controls the electric telescopic component 402 to retract, pulling the connecting rod 304 to the automatic position (lifting the ball 204), and then sends a signal after reaching the position, at which point the automatic feed function is ready. When the "manual" mode is selected, the electric telescopic component 402 is controlled to extend, pushing the connecting rod 304 to the manual position (the ball 204 falls into the annular groove 401, and the locking block 302 engages with the locking groove 305), and then locks in place.

[0029] Furthermore, such as Figure 2 , Figure 5 , Figure 6 and Figure 8 As shown, a second side cover 404 is installed on the side of the housing 104. An electrical connector 403 is detachably installed inside the second side cover 404 and opposite to the slide rail 303. The conductive slip ring is generally composed of a stator and a rotor. The second side cover 404 provides support for the stator on the conductive slip ring. The rotor is connected to the tail end of the electric cylinder and rotates relative to the stator. There is a gap between the slide rail 303 and the electrical connector 403. A connection hole 405 communicating with the mounting cavity 105 is opened on the side of the housing 104. The wire of the electrical connector 403 passes through the connection hole 405 and extends into the mounting cavity 105 and is electrically connected to the control system of the drilling rig 100 along with the drive component 201.

[0030] Furthermore, such as Figure 8 As shown, the two side walls of the annular groove 401 are arc surfaces 406 that lift the ball 204 to move along the limiting hole 203, so that the ball 204 can be lifted and engaged with the arc groove 208 on the driven gear 202 during the movement of the connecting rod 304.

[0031] Furthermore, such as Figure 8As shown, the outer end of the connecting rod 304 is integrally formed with a regular prism 307, and a slot 305 is opened at the end of the regular prism 307. The end of the lifting shaft 102 is provided with a regular polygonal slot 308 that is adapted to the regular prism 307. After the slot 305 is inserted into the block 302, the regular prism 307 can be rotated by manually shaking the rocker handle 301. The regular prism 307 can drive the lifting shaft 102 to rotate synchronously to achieve manual feed.

[0032] Furthermore, such as Figure 8 As shown, a fixing hole is provided on the lifting shaft 102, and a fixing groove is provided on the side of the electric telescopic component 402. Fasteners 407 for fixing the position of the electric telescopic component 402 are installed in the fixing hole and the fixing groove, locking the position of the electric telescopic component 402 (i.e., the electric cylinder) so that the electric telescopic component 402 can rotate stably with the connecting rod 304 and the lifting shaft 102, avoiding relative friction between the electric telescopic component 402 and the inner wall of the slide 303, thus reducing its service life.

[0033] In this invention, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this invention according to the specific circumstances.

[0034] Obviously, the embodiments described above are merely some embodiments of the present invention, not all embodiments. The accompanying drawings show preferred embodiments of the present invention, but do not limit the patent scope of the present invention. The present invention can be implemented in many different forms; rather, these embodiments are provided to provide a more thorough and complete understanding of the disclosure of the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing specific embodiments, or make equivalent substitutions for some of the technical features. Any equivalent structures made using the content of this specification and drawings, directly or indirectly applied to other related technical fields, are similarly within the patent protection scope of this invention.

Claims

1. An automatic feed transmission and switching mechanism for a mini horizontal drilling machine, comprising a drilling rig (100), a drill bit holder (101) vertically slidably mounted at the end of the drilling rig (100), and a lifting shaft (102) horizontally rotatably mounted in the middle of the drilling rig (100), wherein the middle part of the lifting shaft (102) meshes with the drill bit holder (101) via a lifting gear (103), characterized in that, Also includes: The automatic feed mechanism (200) includes a drive component (201) and a driven gear (202) installed at the bottom of the drill (100). The driven gear (202) is coaxial with the end of the lifting shaft (102). The output end of the drive component (201) is connected to the driven gear (202) by a gear set. The end of the lifting shaft (102) is provided with a set of limiting holes (203) at equal intervals in an annular shape. A ball bearing (204) is slidably installed in the limiting hole (203). The ball bearing (204) is adapted to engage with the inner wall of the driven gear (202). The manual feed mechanism (300) includes a crank handle (301) rotatably mounted on one side of the bottom of the drill (100). The end of the crank handle (301) has a locking block (302). A slide rail (303) is provided through the middle of the lifting shaft (102) along its axial direction. A connecting rod (304) is slidably mounted in the slide rail (303). The end of the connecting rod (304) is provided with a slot that matches the locking block (302). The control switching mechanism (400) includes a control component installed in the slide rail (303) and used to control the linear sliding of the connecting rod (304). The side wall of the connecting rod (304) is provided with an annular groove (401). The limiting hole (203) is connected to the slide rail (303). When the ball (204) falls into the annular groove (401) and separates from the driven gear (202), the locking block (302) engages with the locking groove (305).

2. The automatic feed transmission and switching mechanism for the mini horizontal drilling machine according to claim 1, characterized in that, The drilling rig (100) also includes a housing (104), the lifting shaft (102) is rotatably mounted on the bottom of the housing (104), the bottom of the housing (104) also has a mounting cavity (105), the side of the mounting cavity (105) has a mounting groove (106), the driving member (201) is mounted in the mounting cavity (105) and its output end extends into the mounting groove (106), the mounting groove (106) also has a transmission shaft (205) mounted in it, the gear set includes a driving gear (206) mounted on the output end of the driving member (201) and a pair of transmission gears (207) mounted on the transmission shaft (205), one of the transmission gears (207) meshes with the driving gear (206), and the other transmission gear (207) meshes with the driven gear (202).

3. The automatic feed transmission and switching mechanism for the mini horizontal drilling machine according to claim 2, characterized in that, The outer end of the mounting groove (106) is fitted with a first side cover (306), and the rocker arm (301) is rotatably mounted on the first side cover (306).

4. The automatic feed transmission and switching mechanism for the mini horizontal drilling machine according to claim 3, characterized in that, The inner wall of the driven gear (202) is provided with a set of arc-shaped slots (208) at equal intervals in an annular shape. In the automatic feed mode, the outer end of the ball (204) abuts against the inner wall of the arc-shaped slot (208), and the inner end of the ball (204) abuts against the side wall of the connecting rod (304).

5. The automatic feed transmission and switching mechanism for the mini horizontal drilling machine according to claim 4, characterized in that, The control component includes an electric telescopic member (402) fixedly installed in the middle of the slide (303) and an electrical connector (403) fixedly installed on the housing (104). The electrical connector (403) is rotatably connected to the opposite end of the electric telescopic member (402), and the output end of the electric telescopic member (402) is fixed to the end of the connecting rod (304).

6. The automatic feed transmission and switching mechanism for the mini horizontal drilling machine according to claim 5, characterized in that, A second side cover (404) is installed on the side of the housing (104). The electrical connector (403) is detachably installed inside the second side cover (404) and opposite to the slide rail (303). There is a gap between the slide rail (303) and the electrical connector (403). A connection hole (405) communicating with the mounting cavity (105) is opened on the side of the housing (104). The wire of the electrical connector (403) passes through the connection hole (405) and extends into the mounting cavity (105) and is electrically connected to the control system of the drilling rig (100) along with the drive unit (201).

7. The automatic feed transmission and switching mechanism for the mini horizontal drilling machine according to claim 6, characterized in that, The two sidewalls of the annular groove (401) are arc surfaces (406) that push the ball (204) to move along the limiting hole (203).

8. The automatic feed transmission and switching mechanism for the mini horizontal drilling machine according to claim 7, characterized in that, The outer end of the connecting rod (304) is integrally formed with a regular prism (307), the slot (305) is opened at the end of the regular prism (307), and the end of the lifting shaft (102) is provided with a regular polygonal slot (306) that is adapted to the regular prism (307).

9. The automatic feed transmission and switching mechanism for the mini horizontal drilling machine according to claim 8, characterized in that, The lifting shaft (102) has a fixing hole, and the electric telescopic component (402) has a fixing groove on its side. Fasteners (407) for fixing the position of the electric telescopic component (402) are installed in the fixing hole and the fixing groove.

10. The automatic feed transmission and switching mechanism for the mini horizontal drilling machine according to claim 9, characterized in that, The drill bit holder (101) has a lifting gear set (107) on its side that meshes with the lifting gear (103).

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