A device for drilling blind holes horizontally

Abstract

The invention discloses a device for transversely drilling blind holes, and relates to the technical field of drilling tools. One end of an upper rod is rotatably connected to one end of a lower rod, and the upper rod and the lower rod can rotate relative to each other. At least one middle rod is fixed to the outer periphery of the lower rod. A gear set includes an active bevel gear and at least one driven bevel gear. The active bevel gear is coaxially fixedly sleeved on the outer periphery of the upper rod, and the driven bevel gear is coaxially sleeved on the outer periphery of the middle rod, and the driven bevel gear is rotatably connected to the middle rod. The outer peripheries of the active bevel gear and the driven bevel gear are meshed. A drill bit is fixed to the middle part of the driven bevel gear, and the drill bit and the driven bevel gear are coaxially arranged. The drill bit is used to face the inner wall of a workpiece. A driving element can drive the upper rod to rotate and drive the active bevel gear to rotate. The active bevel gear can drive the driven bevel gear and the drill bit to rotate. A guide assembly is used to drive the drill bit to move in a direction close to or away from the inner wall of the workpiece. The device for transversely drilling blind holes can improve the efficiency of drilling blind holes, and has a simple structure and reduces costs.

Description

Technical Field

[0001] The invention relates to the technical field of drilling tools, and in particular to a device for transversely drilling blind holes. Background Art

[0002] As gas actuators are increasingly used in folding-wing cruise missiles, folding-wing drones, and other fields, the demand for products is growing rapidly. The processing of small-diameter deep blind holes inside the pressure-bearing cylinder, a key part of the gas actuator, is a key process for this part. In addition, the transverse blind holes of the rock drill cylinder, the blind holes of the column heads of the single-unit hydraulic props for mining, and the blind holes at the excitation end of the engine rotor all require a more accurate and convenient processing method.

[0003] At present, there are two main ways to process blind holes: one is to use traditional mechanical processing methods such as drilling machines and grinders; the other is electrospark machining. Traditional mechanical processing methods are sometimes powerless to process some blind holes. For example, when drilling blind holes inside cylindrical parts, traditional mechanical processing methods use drilling machines. If it is to process through holes, drilling machines can easily do it, but if it is to process non-through holes, the drill bit needs to be inserted into the inside of the part for processing. At this time, the drilling machine cannot achieve this processing method. The reason is that the processing position cannot be determined, and the drill bit cannot be inserted into the inside of the workpiece to achieve horizontal drilling; and the electrospark machining method has the problem of electrode loss, and it is difficult to accurately control the processing volume. At the same time, the establishment of the electrospark drilling model is very complicated, time-consuming and labor-intensive, and the deviation is large. Summary of the invention

[0004] The purpose of the present invention is to provide a device for transversely drilling blind holes to solve the problems existing in the above-mentioned prior art, improve the efficiency of drilling blind holes, and have a simple structure and reduce costs.

[0005] To achieve the above object, the present invention provides the following solutions:

[0006] The present invention provides a device for transversely drilling a blind hole, comprising a driving element, an upper rod, a lower rod, a gear set, a drill bit and a guide assembly, wherein one end of the upper rod is rotatably connected to one end of the lower rod, and the upper rod and the lower rod can rotate relative to each other, at least one middle rod is fixed to the outer periphery of the lower rod, the gear set comprises an active bevel gear and at least one driven bevel gear, the active bevel gear is coaxially fixedly sleeved on the outer periphery of the upper rod, the driven bevel gear is coaxially sleeved on the outer periphery of the middle rod, and the driven bevel gear is rotatably connected to the middle rod, the active bevel gear and the driven bevel gear are meshed with the outer periphery of the middle rod, the drill bit is fixed to the middle part of the driven bevel gear, and the drill bit and the driven bevel gear are coaxially arranged, the drill bit is used to face the inner wall of a workpiece, the driving element can drive the upper rod to rotate and drive the active bevel gear to rotate, the active bevel gear can drive the driven bevel gear and the drill bit to rotate, and the guide assembly is used to drive the drill bit to move in a direction close to or away from the inner wall of the workpiece.

[0007] Preferably, a bearing seat is fixed on one end of the lower rod close to the upper rod, a bearing is installed in the bearing seat, one end of the upper rod close to the lower rod extends into the bearing and is fixed, and the upper rod can rotate relative to the lower rod.

[0008] Preferably, the bearing is a one-way bearing, and the rotation direction of the upper rod is divided into a drilling direction and an adjustment direction. When the upper rod rotates along the drilling direction, the upper rod can rotate relative to the lower rod. When the upper rod rotates along the adjustment direction, the upper rod can drive the lower rod to rotate.

[0009] Preferably, an angle disc is also sleeved on the outer circumference of the upper rod, and the angle disc is used to measure the angle of rotation of the upper rod along the adjustment direction.

[0010] Preferably, a threaded hole is provided in the middle of a side of the driven bevel gear away from the center rod, a thread is provided on the outer periphery of one end of the drill bit, and the drill bit is connected to the threaded hole through threads.

[0011] Preferably, one end of the middle rod away from the lower rod is rotatably connected to the driven bevel gear via a ball bearing.

[0012] Preferably, the middle rod is fixed to one end of the lower rod close to the upper rod, and the lower rod can be extended and retracted along the axial direction of the lower rod, and the extension amount is fixed by a clamping element, and the middle rod is driven to reciprocate along the axial direction of the lower rod.

[0013] Preferably, there are two driven bevel gears, two middle rods, and the two middle rods are symmetrically arranged about the central axis of the lower rod, the central axis of each driven bevel gear is perpendicular to the central axis of the active bevel gear, and the driven bevel gears are arranged on both sides of the active bevel gear back to back, a drill bit is fixed in the middle of each driven bevel gear, and each drill bit is coaxially arranged with each driven bevel gear.

[0014] Preferably, the guide assembly comprises an upper chassis, a lower chassis and an electromagnet, the upper chassis and the lower chassis are arranged side by side along the axial direction of the lower rod, and a protrusion is provided on the side of the upper chassis close to the lower chassis, the protrusion and the upper chassis are arranged coaxially, and a groove is provided on the lower chassis at a position corresponding to the protrusion, the groove and the lower chassis are arranged coaxially, and the protrusion is embedded in the groove and rotatably connected with the groove, and a plurality of the electromagnets are also fixed on the side of the lower chassis close to the upper chassis, and the electromagnets are used to be electrically connected to an external power supply, and the electromagnets can fix the upper chassis on the lower chassis after energization, and the end of the lower rod away from the upper rod is slidably connected to the middle part of the upper chassis, the lower rod can slide on the upper chassis, and the lower rod can drive the upper chassis to rotate.

[0015] Preferably, a slide rail is provided on the side of the upper chassis away from the lower chassis, and a slider is fixed on the end of the lower rod away from the upper rod. The slider can slide back and forth in the slide rail and drive the drill bit to move towards or away from the inner wall of the workpiece.

[0016] Compared with the prior art, the present invention has achieved the following technical effects:

[0017] The device for drilling blind holes transversely provided by the present invention comprises: one end of an upper rod is rotatably connected to one end of a lower rod, and the upper rod and the lower rod can rotate relative to each other; at least one middle rod is fixed to the outer periphery of the lower rod; one end of the middle rod is fixed to the outer wall of the lower rod, and the other end extends in a direction away from the lower rod; the gear set comprises a driving bevel gear and at least one driven bevel gear; the driving bevel gear is coaxially sleeved on the outer periphery of the upper rod and can rotate with the upper rod; the driven bevel gear is coaxially sleeved on the outer periphery of the middle rod, and the outer peripheries of the driving bevel gear and the driven bevel gear are meshed, so that the driven bevel gear and the driving bevel gear are meshed. The rotation planes are different, which makes it easy to extend the device for transversely drilling blind holes into the workpiece, and by controlling the upper rod outside the workpiece, the driving bevel gear and the driven bevel gear are engaged to realize the rotation of the driven bevel gear around an axis perpendicular to the central axis of the workpiece, thereby drilling a blind hole in a direction perpendicular to the inner wall of the workpiece, and at the same time, the guide component drives the drill bit to move in a direction close to or away from the inner wall of the workpiece, realizing the rotation and feeding of the drill bit, thereby completing the blind hole drilling action, and the overall structure is simple, easy to process, while improving the efficiency of blind hole drilling, it also reduces costs, and has a simple structure. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a structural schematic diagram of a device for transversely drilling blind holes provided by the present invention;

[0020] Figure 2 is a top view of a guide assembly in the device for transversely drilling blind holes provided by the present invention;

[0021] Figure 3 It is a top view of the angle plate in the device for transversely drilling blind holes provided by the present invention;

[0022] Figure 4 It is a structural schematic diagram of a lower rod in a device for transversely drilling blind holes provided by the present invention;

[0023] In the figure: 100-a device for drilling a blind hole transversely, 1-a driving element, 2-an angle plate, 3-an upper rod, 4-an active bevel gear, 5-a one-way bearing, 6-a driven bevel gear, 7-a drill bit, 8-a workpiece, 9-a ball bearing, 10-an upper chassis, 11-an electromagnet, 12-a lower chassis, 13-a motor, 14-a lower rod, 15-a middle rod, 16-a drilling section, 17-a scale line, 18-a clamping device, 19-a connecting section, 20-a slider, 21-a slide rail. DETAILED DESCRIPTION

[0024] 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.

[0025] The purpose of the present invention is to provide a device for transversely drilling blind holes, so as to solve the technical problems of existing blind hole drilling tools, such as difficulty in drilling holes, low efficiency and high production cost.

[0026] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0027] like Figure 1-Figure 3As shown, the present invention provides a device 100 for drilling blind holes horizontally, which is mainly used for drilling blind holes horizontally. When in use, it needs to extend into the interior of a workpiece 8 and drill holes on the inner wall of the workpiece 8, including a driving element 1, an upper rod 3, a lower rod 14, a gear set, a drill bit 7 and a guide assembly. One end of the upper rod 3 is rotatably connected to one end of the lower rod 14, and the upper rod 3 and the lower rod 14 can rotate relative to each other to facilitate the conversion of the rotation plane, so as to facilitate direct radial drilling in the axial direction of the workpiece 8. At least one middle rod 15 is fixed on the outer periphery of the lower rod 14. Preferably, the middle rod 1 The central axis of the middle rod 15 is perpendicular to the central axis of the lower rod 14. After the device 100 for transversely drilling a blind hole provided by the present invention is placed in the workpiece 8, the upper rod 3 and the lower rod 14 are parallel to the axial direction of the workpiece 8, that is, perpendicular to the axial direction of the blind hole to be drilled. The central axis of the middle rod 15 is located on the same straight line as the central axis of the blind hole to be drilled. The gear set includes a driving bevel gear 4 and at least one driven bevel gear 6. Preferably, there are two driven bevel gears 6 to facilitate the drilling of symmetrical blind holes. The driving bevel gear 4 is coaxially fixedly sleeved on the outer periphery of the upper rod 3, and the driving bevel gear 4 can follow the The upper rod 3 rotates, and the driven bevel gear 6 is coaxially sleeved on the outer periphery of the middle rod 15, and the driven bevel gear 6 is rotatably connected with the middle rod 15, and the active bevel gear 4 is meshed with the outer periphery of the driven bevel gear 6, so that when the upper rod 3 drives the active bevel gear 4 to rotate, the active bevel gear 4 drives the driven bevel gear 6 to rotate, thereby converting the rotation plane, which is convenient for drilling blind holes inside the workpiece 8. The structure is simple, the processing is convenient, and the efficiency of drilling blind holes is improved. The drill bit 7 is fixed in the middle of the driven bevel gear 6, and the drill bit 7 and the driven bevel gear 6 are coaxially arranged. The drill bit 7 is used to face the inner wall of the workpiece 8. In order to contact the inner wall of the workpiece 8 and drill a blind hole on the inner wall of the workpiece 8, the driving element 1 can drive the upper rod 3 to rotate and drive the active bevel gear 4 to rotate. The active bevel gear 4 can drive the driven bevel gear 6 and the drill bit 7 to rotate. The guide assembly is used to drive the drill bit 7 to move toward or away from the inner wall of the workpiece 8, thereby realizing the rotation and feeding of the drill bit 7, and then completing the blind hole drilling action. The overall structure is simple and easy to process. While improving the efficiency of blind hole drilling, it also reduces costs. More preferably, the driving element 1 is a motor, and the output shaft of the motor is fixedly connected to the upper end of the upper rod 3.

[0028] Specifically, a bearing seat is fixed on one end of the lower rod 14 close to the upper rod 3, a bearing is installed in the bearing seat, one end of the upper rod 3 close to the lower rod 14 extends into the bearing and is fixed, and the upper rod 3 can rotate relative to the lower rod 14, and the bearing and the bearing seat are used to ensure the stability of the connection and rotation.

[0029] The bearing is a one-way bearing 5, which can rotate freely in one direction and is locked in another direction. Therefore, the rotation direction of the upper rod 3 is divided into a drilling direction and an adjustment direction. When the upper rod 3 rotates in the drilling direction, the upper rod 3 is driven to rotate by the driving element 1, and the one-way bearing 5 can rotate, thereby realizing the rotation of the upper rod 3 relative to the lower rod 14, that is, the upper rod 3 rotates and the lower rod 14 is fixed, thereby realizing the rotation of the drill bit 7, which is convenient for drilling blind holes. When the upper rod 3 rotates in the adjustment direction, this action is directly manually operated by the worker, and the one-way bearing 5 is locked, thereby realizing that the upper rod 3 can drive the lower rod 14 to rotate together, and then the lower rod 14 drives the middle rod 15, the driven bevel gear 6 and the drill bit 7 to rotate along the axial direction of the lower rod 14, realizing the change of the position of the drill bit 7, and then realizing drilling holes at different horizontal positions of the inner wall of the workpiece 8, realizing the multi-angle drilling function, and improving the scope of application.

[0030] An angle disk 2 is also sleeved on the outer circumference of the upper rod 3, and the angle disk 2 is used to measure the rotation angle of the upper rod 3 along the adjustment direction. When the worker manually controls the upper rod 3 to rotate along the adjustment direction, under the action of the one-way bearing 5, the lower rod 14 rotates with the upper rod 3, thereby realizing the adjustment of the drilling position. At the same time, the angle disk 2 can directly measure the rotation angle of the upper rod 3, thereby accurately controlling the drilling position.

[0031] A threaded hole is provided in the middle of the side away from the middle rod 15 on the driven bevel gear 6, and a thread is provided on the outer periphery of one end of the drill bit 7, and the drill bit 7 is connected to the threaded hole through a thread, so as to realize the fixed connection between the drill bit 7 and the driven bevel gear 6. More preferably, when the driven bevel gear 6 drives the drill bit 7 to rotate, it rotates in the tightening direction of the drill bit 7, so a tightening force is always applied to the drill bit 7 to prevent the drill bit 7 from falling off and affecting the drilling efficiency.

[0032] One end of the middle rod 15 away from the lower rod 14 is rotatably connected to the driven bevel gear 6 via the ball bearing 9, so that the middle rod 15 and the driven bevel gear 6 are rotatably connected and the stability of the connection is ensured.

[0033] The middle rod 15 is fixed to one end of the lower rod 14 close to the upper rod 3, which is convenient for the meshing of the active bevel gear 4 and the driven bevel gear 6. The lower rod 14 can be extended and retracted along the axial direction of the lower rod 14, so as to facilitate the radial adjustment of the position of the drill bit 7 in the workpiece 8, and then adjust the drilling position, and fix the extension amount by the clamping element to achieve the fixation of the extension amount, which is convenient for the lower rod 14 to extend and retract during the drilling process, affecting the drilling efficiency. More preferably, the extension principle of the lower rod 14 is similar to the adjustment of the camera bracket. The lower rod 14 is divided into a drilling section 16 and a connecting section 19. The connecting section 19 is a hollow tube body, and the outer wall of the drilling section 16 is provided with a through hole, and the outer periphery of the connecting section 19 is provided with a plurality of through holes. The lower end of the drilling section 16 extends into the connecting section 19 and is connected through a clamping device 1 8 passes through the through holes on the connecting section 19 and the through holes on the drilling section 16 in sequence to achieve connection and fixation of the drilling section 16 and the connecting section 19, the middle rod 15 is fixed on the drilling section 16, and the through holes on the drilling section 16 are connected with different through holes on the connecting section 19 to achieve adjustment of the height of the drill bit 7, and the device 100 for transversely drilling blind holes provided by the present invention completes the adjustment of the height of the drill bit 7 before being placed into the part to be drilled with a blind hole, so as to facilitate adjustment, and a scale line 17 is provided on the side wall of the drilling section 16 to accurately control the distance that the drilling section 16 extends into the connecting section 19, thereby accurately controlling the drilling height of the drill bit 7, but the telescopic method of the lower rod 14 provided by the present invention is not limited to the above limitation, as long as stable telescopic and fixation can be achieved.

[0034] There are two driven bevel gears 6 and two middle rods 15. Each driven bevel gear 6 is respectively sleeved on the outer circumference of each middle rod 15 to fix the position of the driven bevel gear 6, and the two middle rods 15 are symmetrically arranged about the central axis of the lower rod 14. The central axis of each driven bevel gear 6 is perpendicular to the central axis of the active bevel gear 4, and the driven bevel gears 6 are arranged on both sides of the active bevel gear 4 back to back. A drill bit 7 is fixed in the middle of each driven bevel gear 6, and the drill bit 7 is coaxially arranged with each driven bevel gear 6, so that two blind holes symmetrical along the axial direction of the upper rod 3 can be drilled.

[0035] The guide assembly includes an upper chassis 10, a lower chassis 12 and an electromagnet 11. The upper chassis 10 and the lower chassis 12 are arranged side by side along the axial direction of the lower rod 14, and a protrusion is provided on the side of the upper chassis 10 close to the lower chassis 12, and the protrusion and the upper chassis 10 are coaxially arranged. A groove is provided at a position corresponding to the protrusion on the lower chassis 12, and the groove and the lower chassis 12 are coaxially arranged, and the protrusion is embedded in the groove and rotatably connected with the groove. More preferably, a plurality of electromagnets 11 are fixed on the side of the lower chassis 12 close to the upper chassis 10, and the electromagnet 11 is used to be electrically connected to an external power supply. After the electromagnet 11 is energized, the upper chassis 10 can be fixed on the lower chassis 12, that is, the electromagnet 11 is used to control whether the upper chassis 10 and the lower chassis 12 are relatively rotated or synchronously rotated. The end of the lower rod 14 away from the upper rod 3 is slidably connected to the middle part of the upper chassis 10, and the lower rod 14 can be on the upper chassis 10. The upper chassis 10 and the lower chassis 12 are fixed by the electromagnet 11, that is, the two cannot rotate relative to each other. When the upper rod 3 rotates in the drilling direction, the lower rod 14 is fixed, and the upper chassis 10 also limits the rotation of the lower rod 14, directly controlling the upper rod 3 and the lower rod 14 to drive the drill bit 7 to move in the drilling direction to achieve drilling. When the angle of the drill bit 7 needs to be adjusted, the electromagnet 11 is not energized, and the upper chassis 10 can rotate on the lower chassis 12, and the upper rod 3 rotates in the adjustment direction, driving the lower rod 14 and the drill bit 7 to rotate, and then the lower rod 14 drives the upper chassis 10 to rotate, reducing the resistance during rotation, and the friction between the upper chassis 10 and the lower chassis 12 can be reduced by adding lubricating oil, fine-machining the contact surface to reduce the friction coefficient, etc., to facilitate the adjustment of the angle.

[0036] A slide rail 21 is provided on the side of the upper chassis 10 away from the lower chassis 12, and a slider 20 is fixed on the end of the lower rod 14 away from the upper rod 3. The slider 20 can slide back and forth in the slide rail 21 and drive the drill bit 7 to move toward or away from the inner wall of the workpiece 8. The cooperation between the slider 20 and the slide rail 21 can ensure stability during the drilling process. More preferably, the movement of the slider 20 is controlled by the motor 13, and the motor 13 is installed on the side of the upper chassis 10 away from the lower chassis 12. The reciprocating movement of the slider 20 is controlled by the motor 13, and the motor 13 is a small motor. The setting of the motor 13 should not hinder the normal rotation of the driven bevel gear 6.

[0037] As a specific embodiment, when the device 100 for drilling a blind hole transversely provided by the present invention is used to drill a blind hole transversely inside a workpiece 8, the following steps need to be performed:

[0038] S1: According to the actual position of the blind hole, by adjusting the distance of the drilling section 16 extending into the interior of the connecting section 19, the distance between the drill bit 7 and the lower end of the connecting section 19 is adjusted, thereby adjusting the drilling height, and in combination with the reading of the scale line 17, the drilling height is precisely controlled;

[0039] S2: The device 100 for drilling a blind hole transversely is placed inside the workpiece 8, and the driving element 1 is started. Under the action of the one-way bearing 5, the upper rod 3 rotates relative to the lower rod 14, thereby realizing the rotation of the drill bit 7. At the same time, the motor 13 controls the slider 20 to move toward the direction of the blind hole to be drilled, thereby realizing the drilling of the drill bit 7. When it is necessary to drill a blind hole symmetrically along the central axis of the workpiece 8, the moving direction of the slider 20 can be directly changed;

[0040] S3: When the blind holes to be drilled are multiple blind holes arranged circumferentially around the central axis of the workpiece 8, after a single drilling is completed, it is necessary to change the drilling direction of the drill bit 7, and directly manually control the rotation of the upper rod 3. At this time, the rotation direction of the upper rod 3 is opposite to that of the drill bit 7 when drilling, and the one-way bearing 5 is locked, so that the upper rod 3 drives the lower rod 14 to rotate synchronously, and the lower rod 14 drives the drill bit 7 to revolve around the central axis of the workpiece 8 to adjust the drilling angle. At this time, the above S2 step is performed again to drill the blind hole.

[0041] The present specification uses specific examples to illustrate the principles and implementation methods of the present invention. The above examples are only used to help understand the method and core idea of ​​the present invention. At the same time, for those skilled in the art, according to the idea of ​​the present invention, there will be changes in the specific implementation methods and application scope. In summary, the content of this specification should not be understood as limiting the present invention.

Claims

1. A device for drilling a blind hole transversely, characterized in that: The invention comprises a driving element, an upper rod, a lower rod, a gear set, a drill bit and a guide assembly, wherein one end of the upper rod is rotatably connected to one end of the lower rod, and the upper rod and the lower rod can rotate relative to each other, at least one middle rod is fixed to the outer periphery of the lower rod, the gear set comprises an active bevel gear and at least one driven bevel gear, the active bevel gear is coaxially fixedly sleeved on the outer periphery of the upper rod, the driven bevel gear is coaxially sleeved on the outer periphery of the middle rod, and the driven bevel gear is rotatably connected to the middle rod, the active bevel gear and the driven bevel gear are meshed with each other at the outer periphery, the drill bit is fixed to the middle part of the driven bevel gear, and the drill bit and the driven bevel gear are coaxially arranged, the drill bit is used to face the inner wall of the workpiece, the driving element can drive the upper rod to rotate, and drive the active bevel gear to rotate, the active bevel gear can drive the driven bevel gear and the drill bit to rotate, and the guide assembly is used to drive the drill bit to move in a direction close to or away from the inner wall of the workpiece; A bearing seat is fixed on one end of the lower rod close to the upper rod, a bearing is installed in the bearing seat, one end of the upper rod close to the lower rod extends into the bearing and is fixed, and the upper rod can rotate relative to the lower rod; The bearing is a one-way bearing, and the rotation direction of the upper rod is divided into a drilling direction and an adjustment direction. When the upper rod rotates along the drilling direction, the upper rod can rotate relative to the lower rod. When the upper rod rotates along the adjustment direction, the upper rod can drive the lower rod to rotate. The guide assembly comprises an upper chassis, a lower chassis and an electromagnet, the upper chassis and the lower chassis are arranged side by side along the axial direction of the lower rod, and a protrusion is provided on the side of the upper chassis close to the lower chassis, the protrusion and the upper chassis are arranged coaxially, a groove is provided on the lower chassis at a position corresponding to the protrusion, the groove and the lower chassis are arranged coaxially, and the protrusion is embedded in the groove and rotatably connected to the groove, a plurality of electromagnets are also fixed on the side of the lower chassis close to the upper chassis, and the electromagnets are used to be electrically connected to an external power supply, and the electromagnets can fix the upper chassis on the lower chassis after being energized, and an end of the lower rod away from the upper rod is slidably connected to the middle part of the upper chassis, the lower rod can slide on the upper chassis, and the lower rod can drive the upper chassis to rotate.

2. The device for transversely drilling blind holes according to claim 1, characterized in that: An angle disc is also sleeved on the outer circumference of the upper rod, and the angle disc is used to measure the angle of rotation of the upper rod along the adjustment direction.

3. The device for transversely drilling blind holes according to claim 1, characterized in that: A threaded hole is provided in the middle of one side of the driven bevel gear away from the middle rod, a thread is provided on the outer periphery of one end of the drill bit, and the drill bit is connected to the threaded hole through threads.

4. The device for transversely drilling blind holes according to claim 1, characterized in that: One end of the middle rod away from the lower rod is rotatably connected to the driven bevel gear via a ball bearing.

5. The device for transversely drilling blind holes according to claim 1, characterized in that: The middle rod is fixed to one end of the lower rod close to the upper rod, and the lower rod can be extended and retracted along the axial direction of the lower rod, and the extension amount is fixed by a clamping element, and the middle rod is driven to reciprocate along the axial direction of the lower rod.

6. The device for transversely drilling blind holes according to claim 1, characterized in that: There are two driven bevel gears and two middle rods, and the two middle rods are symmetrically arranged about the central axis of the lower rod. The central axis of each driven bevel gear is perpendicular to the central axis of the active bevel gear, and the driven bevel gears are arranged on both sides of the active bevel gear in opposite directions. A drill bit is fixed in the middle of each driven bevel gear, and each drill bit is coaxially arranged with each driven bevel gear.

7. The device for transversely drilling blind holes according to claim 1, characterized in that: A slide rail is provided on one side of the upper chassis away from the lower chassis, and a slider is fixed on one end of the lower rod away from the upper rod. The slider can slide back and forth in the slide rail and drive the drill bit to move toward or away from the inner wall of the workpiece.

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