A steering hand drill

Abstract

The invention discloses a steering hand electric drill, which comprises a gun body and an external switching device, the gun body is rotatably connected with the external switching device, the gun body is provided with a transmission device, two internal switching devices, a first bevel gear set and a second bevel gear set, a drill fixture is rotatably connected below the external switching device, the first bevel gear set and the second bevel gear set both comprise a plurality of bevel gears of different sizes, the two internal switching devices are respectively arranged in the gun body and the external switching device, the first bevel gear set is located inside the gun body, the second bevel gear set is located inside the external switching device, and the bevel gears of the second bevel gear set are both provided with a connector for connecting the drill fixture. The application has the effect of enabling the drill bit of the hand electric drill to achieve multi-angle steering and adapt to a variety of working conditions.

Description

Technical Field

[0001] The invention relates to the field of hand electric drill technology, in particular to a steering hand electric drill. Background Art

[0002] During the construction of engineering buildings, home decoration, etc., workers often use electric drills as construction tools. Depending on the parts installed on the drill fixture, the electric drill can be used to drill holes in objects or walls, or to install or remove screws and other parts. Workers only need to hold the electric drill and turn on the electric drill switch, which saves manpower and material resources, and the electric drill is convenient to carry.

[0003] The drill bit installation direction of the hand drill is generally parallel to the output shaft direction of the hand drill. If there are obstacles outside the drilling direction or screw installation direction (refer to Figure 1 ), the drill bit of the electric drill cannot be in line with the drilling direction or the screw installation direction, which may easily cause the drilled hole to not meet expectations or the screw installation direction to deviate. Therefore, the electric drill can be equipped with a corner cutter. The two ends of the corner cutter are respectively connected to the drill bit fixture and the drill bit of the electric drill, so that the drill bit and the output axis direction of the electric drill are at a certain angle, expanding the use range of the electric drill.

[0004] Currently, a single corner cutter can only change the drill bit angle by a single angle. Figure 1 and Figure 2 In the working conditions shown, workers need to assemble and use two different types of corner turners. A single corner turner is suitable for a small range of working conditions. To ensure that the electric drill can adapt to different working conditions, workers need to carry multiple types of corner turners, which increases the carrying burden. Frequent replacement of corner turners makes the construction steps more complicated, reducing the work efficiency of workers. Summary of the invention

[0005] In order to enable the drill bit of a hand electric drill to achieve multi-angle steering and adapt to various working conditions, the present application provides a steering hand electric drill.

[0006] The present application provides a steering hand electric drill, which adopts the following technical solution:

[0007] A steering hand electric drill, comprising a gun body and an external switching device, wherein the gun body is rotatably connected to the external switching device, the gun body is provided with a transmission device, two internal switching devices, a first bevel gear set and a second bevel gear set, a drill fixture is rotatably connected below the external switching device, the first bevel gear set and the second bevel gear set both comprise a plurality of bevel gears of different sizes, the two internal switching devices are respectively arranged in the gun body and the external switching device, the internal switching device comprises a driving member, a moving rod, a conversion disk, an elastic clamping member and a limiting plate, the first bevel gear set and the second bevel gear set are respectively detachably arranged on the two internal bevel gear sets On the conversion disk of the switching device, all bevel gears are arranged at equal angles around the center of the corresponding conversion disk. The conversion disk is provided with a plurality of moving holes for the moving rod to pass through. The driving member and the elastic clamping member are respectively arranged at both ends of the moving rod. The two limit plates are respectively rotatably connected to the gun body and the external switching device. The bevel gears of the first bevel gear group and the bevel gears of the second bevel gear group are both provided with clamping grooves that cooperate with the elastic clamping member. The first bevel gear group is located inside the gun body, and the second bevel gear group is located inside the external switching device. The bevel gears of the second bevel gear group are both provided with connecting members for connecting the drill clamp.

[0008] By adopting the above technical solution, the transmission device is used to provide the driving force for the drill bit clamp and the drill bit to rotate, and the driving member drives the moving rod to extend and retract, completing the connection and separation between the moving rod and the internal gear of the first bevel gear group or the internal gear of the second bevel gear group. When the driving member drives the moving rod to move in the direction close to the driving member, the moving rod drives the corresponding bevel gear to move in the direction close to the conversion disk, so that the bevel gear is connected to the conversion disk, and at the same time, the bevel gear is separated from the moving rod, and the conversion disk rotates to make the other bevel gear move to correspond to the moving rod, and the driving member drives the moving rod to move in the direction away from the driving member. Under the limiting action of the limiting plate, the new bevel gear is connected to the moving rod, and at the same time, the new bevel gear is separated from the conversion disk to complete the switching of the bevel gears. The two internal switching devices switch the bevel gears at the same time, and rotate the outer switching device to make two new bevel gears of the same model mesh, and finally complete the angle change between the drill bit direction and the gun body, so that the hand drill can adapt to different working conditions.

[0009] Optionally, the connecting piece for connecting the drill bit clamp is a push rod, and the connecting piece for connecting the drill bit clamp is fixedly connected to the small end side of the bevel gear of the second bevel gear group. The cross-section of the push rod is polygonal, and the upper end surface of the drill bit clamp is provided with a groove that is compatible with the push rod.

[0010] By adopting the above technical solution, the push rod is inserted into the groove. When the transmission device drives the moving rod in the gun body to rotate, the push rod drives the drill clamp to rotate through the meshing transmission between the bevel gears of the first bevel gear group and the bevel gears of the second bevel gear group.

[0011] Optionally, the conversion disk in the gun body is slidably connected with a transmission rod, one end of the transmission rod passes through the conversion disk in the external switching device and is slidably connected to the conversion disk in the external switching device, and the transmission rod is located between the center of the conversion disk and the bevel gear.

[0012] By adopting the above technical solution, when the conversion disk in the gun body rotates, the conversion disk limits the transmission rod, so that the transmission rod drives the conversion disk in the outer switching device to rotate, so that the conversion disks of the two inner switching devices rotate at the same time, ensuring that the bevel gears of the first bevel gear group and the bevel gears of the second bevel gear group can still match and mesh with each other after synchronous switching.

[0013] Optionally, the transmission rod includes a horizontal rod and a vertical rod, and conversion devices are provided between the horizontal rod and the vertical rod, and between the gun body and the external switching device. The conversion device includes an inner plate, an outer plate and a limit member. The limit member includes a rotating ball, a connecting block and a limit spring. Both ends of the limit spring are respectively fixedly connected to the inner plate and the connecting block. The rotating ball is rotatably connected to the end of the connecting block away from the limit spring. The outer plate is rotatably connected to the outer side of the inner plate. The outer plate is provided with a plurality of limit grooves compatible with the ball.

[0014] By adopting the above technical solution, when the external switching device and the gun body rotate, the horizontal bar and the vertical bar rotate synchronously, and the inner disk and the outer disk rotate relatively. The outer disk exerts a force on the limit member, causing the limit spring to contract. When the outer disk rotates to the required angle, the rotating ball enters the corresponding limit groove, so that the transmission rod and the external switching device will not rotate easily at this time and remain relatively fixed.

[0015] Optionally, the snap-in grooves are all opened at the large end of the bevel gear, and the groove walls of the snap-in grooves include an upper wall and a lower wall. The upper wall is located at one end of the lower wall close to the bottom of the snap-in groove, the upper wall is smoothly connected to the lower wall, and the connection between the upper wall and the lower wall is the smallest diameter of the snap-in groove, and the curvature of the upper wall is greater than the curvature of the lower wall.

[0016] By adopting the above technical solution, the curvature of the upper wall is larger, so that the resistance encountered when the moving rod is separated from the bevel gear is larger, thereby ensuring that the connection between the bevel gear and the conversion plate is relatively stable. The curvature of the lower wall is smaller, so that the resistance encountered when the moving rod is connected to the bevel gear is smaller, so that the moving rod can be connected to the bevel gear more easily.

[0017] Optionally, the elastic clamping part includes a plurality of clamping springs, a plurality of moving blocks and a plurality of balls, the two ends of the clamping spring are respectively fixedly connected to the moving block and the moving rod, the balls are rotatably connected to one end of the moving block away from the clamping spring, the moving rod is provided with a moving groove adapted to the moving block, and the clamping spring is located in the corresponding moving groove.

[0018] By adopting the above technical solution, the ball first comes into contact with the inner wall of the clamping groove, and the inner wall of the limiting groove exerts a force on the ball, causing the clamping spring to contract, and the moving block slides in the moving groove. When the ball passes through the smallest diameter of the clamping groove, the moving block moves away from the bottom of the clamping groove under the elastic force of the clamping spring, so that the elastic clamping part is located in the clamping groove, and the bevel gear is connected to the moving rod.

[0019] Optionally, the external switching device is externally connected to an adjustable bracket, which includes a plurality of legs and a sleeve. The sleeve is slidably connected to the outside of the external switching device, and an adjustment device for adjusting the angle of the legs is provided between the legs and the sleeve.

[0020] By adopting the above technical solution, the legs are adjustable, so that the adjustable bracket can be adjusted according to the actual working conditions, which is beneficial to improving the versatility of the adjustable bracket. At the same time, the adjustable bracket is beneficial to ensuring that the forward direction of the drill bit is not offset, which is beneficial to ensuring the construction effect.

[0021] Optionally, the adjusting device includes a moving part, a first moving ring, a second moving ring, a plurality of transmission parts and a plurality of rotating parts cooperating with the transmission parts. The moving part is fixedly connected to the outside of the sleeve, all the transmission parts are fixedly connected to the first moving ring, the legs are respectively fixedly connected to the corresponding rotating parts, the second moving ring is a polygonal ring, and the rotating parts are rotatably connected to the second moving ring at equal intervals.

[0022] By adopting the above technical solution, the moving member drives the first moving ring to move, and then drives the transmission member to drive the rotating member to rotate, so that the supporting leg rotates with the rotating member, thereby realizing the angle adjustment between the supporting leg and the external switching device.

[0023] In summary, the present application includes at least one of the following beneficial technical effects:

[0024] 1. By setting an internal switching device, the bevel gear connected to the moving rod can be switched, and by setting an external switching device, the angle between the external switching device and the gun body can be changed to ensure that the bevel gears after switching can still mesh with each other, so that the drill bit and the gun body can form a variety of angles to adapt to a variety of working conditions;

[0025] 2. By setting a transmission rod, the two conversion disks located in the gun body and the external switching device can rotate synchronously and at the same rotation angle, ensuring that the two internal switching devices can be switched at the same time and the bevel gears after switching match each other;

[0026] 3. By setting up the adjustable bracket, when the hand drill is in use, the adjustable bracket plays a supporting and limiting role to ensure that the forward direction of the drill bit is not deviated. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1These are two special working conditions in the background technology.

[0028] Figure 2 It is a schematic diagram of the overall structure of a steering electric drill when bevel gear three is meshing with bevel gear six.

[0029] Figure 3 It is a schematic diagram of the structure of the first bevel gear set and the second bevel gear set.

[0030] Figure 4 It is a schematic diagram of the internal structure of the gun body and the external switching device.

[0031] Figure 5 It is a cross-sectional schematic diagram of the moving rod and the bevel gear.

[0032] Figure 6 This is an exploded diagram of the conversion device.

[0033] Explanation of reference numerals: 1, gun body; 2, external switching device; 3, internal switching device; 31, driving member; 32, moving rod; 33, conversion plate; 331, moving hole; 34, elastic clamping member; 341, clamping spring; 342, moving block; 343, ball bearing; 35, limit plate; 36; transmission rod; 361, cross bar; 362, vertical bar; 4, transmission device; 41, driving motor; 42, worm wheel; 43, worm; 44, transmission plate; 5, first bevel gear set; 51, bevel gear second; 511, clamping groove ;512, upper wall;513, lower wall;52, bevel gear three;6, second bevel gear set;61, bevel gear five;62, bevel gear six;611, connecting piece;7, conversion device;71, inner plate;72, outer plate;73, limit piece;731, rotating ball;732, connecting block;733, limit spring;8, adjustable bracket;81, support leg;82, sleeve;831, moving piece;832, first moving ring;833, second moving ring;834, transmission piece;835, rotating piece;9, drill fixture. DETAILED DESCRIPTION

[0034] The present application is further described in detail below in conjunction with all the accompanying drawings.

[0035] The embodiment of the present application discloses a steering electric hand drill. Example

[0036] Reference Figure 2 and Figure 3A steering hand-held electric drill comprises a gun body 1 and an external switching device 2. The gun body 1 is provided with a first bevel gear set 5 and a second bevel gear set 6. The first bevel gear set 5 and the second bevel gear set 6 both comprise a plurality of bevel gears of different sizes. The first bevel gear set 5 is located inside the gun body 1, and the second bevel gear set 6 is located inside the external switching device 2. In this embodiment, for the convenience of description, it is assumed that the first bevel gear set 5 and the second bevel gear set 6 both comprise three bevel gears of different sizes. The first bevel gear set 5 comprises a bevel gear 1, a bevel gear 2 51 and a bevel gear 3 52. The second bevel gear set 6 comprises a bevel gear 4, a bevel gear 5 61 and a bevel gear 6 62. The bevel gear 1 and the bevel gear 4 can mesh with each other and the angle formed by the rotation axis is an acute angle. The bevel gear 2 51 and the bevel gear 5 61 can mesh with each other and the angle formed by the rotation axis is a right angle. The bevel gear 3 52 and the bevel gear 6 62 can mesh with each other and the angle formed by the rotation axis is an obtuse angle.

[0037] Reference Figure 3 and Figure 4 The gun body 1 is also provided with two internal switching devices 3, which are respectively arranged on the gun body 1 and the external switching device 2 (refer to Figure 2 ), the internal switching device 3 includes a driving member 31, a moving rod 32, a conversion disk 33 and a limit plate 35 (refer to Figure 2 ), the first bevel gear set 5 and the second bevel gear set 6 are respectively detachably arranged on the conversion disks 33 of the two inner switching devices 3, and all bevel gears are arranged at equal angles around the center of the corresponding conversion disk 33, that is, bevel gear one, bevel gear two 51 and bevel gear three 52 are detachably connected to the conversion disk 33 in the gun body 1 at equal angles, and bevel gear four, bevel gear five 61 and bevel gear six 62 are detachably connected to the conversion disk 33 of the outer switching device 2 at equal angles. In the initial state, the two inner switching devices 3 use bevel gear two 51 and bevel gear five 61 respectively.

[0038] Reference Figure 3 and Figure 5 The internal switching device 3 also includes an elastic clamping piece 34, which is arranged at one end of the moving rod 32. The bevel gear of the first bevel gear set 5 and the bevel gear of the second bevel gear set 6 are both provided with a clamping groove 511 that matches the elastic clamping piece 34. The moving rod 32 can be connected to the corresponding bevel gear through the cooperation between the elastic clamping piece 34 and the clamping groove 511. The internal switching device 3 can switch the bevel gear connected to the moving rod 32.

[0039] Reference Figure 2 and Figure 4The gun body 1 is rotatably connected to the external switching device 2. When the bevel gear connected to the moving rod 32 is switched, the external switching device 2 is rotated to make the two bevel gears that can match each other engage, ensuring that when the moving rod 32 in the gun body 1 rotates, it can be smoothly transmitted through the meshing transmission between the bevel gears, thereby driving the moving rod 32 in the external switching device 2 to rotate. When the moving rod 32 in the gun body 1 rotates, by switching different bevel gears, the moving rod 32 in the external switching device 2 can be rotated around axes at different angles.

[0040] Reference Figure 3 and Figure 4 The gun body 1 is also provided with a transmission device 4, which is used to drive the moving rod 32 in the gun body 1 to rotate. At this time, the moving rod 32 in the gun body 1 rotates, driving the bevel gear 2 51 to rotate together, and the bevel gear 1 and the bevel gear 5 61 are meshed with each other, thereby driving the bevel gear 5 61 and the external switching device 2 (refer to Figure 2 ) in the moving rod 32 is rotated, the external switching device 2 (refer to Figure 2 ) is rotatably connected with a drill clamp 9 below, and the bevel gears of the second bevel gear set 6 are all provided with a connecting piece 611 for connecting the drill clamp 9. The bevel gear five 61 drives the drill clamp 9 to rotate through the connecting piece 611 connected to the drill clamp 9, thereby rotating the drill bit clamped in the drill clamp 9, thereby realizing functions such as drilling holes or disassembling screws of the drill bit.

[0041] Reference Figure 3 and Figure 4 In this embodiment, taking the switching of bevel gear 2 51 to bevel gear 3 52 as an example, a detailed description of the process of switching bevel gears of the internal switching device 3 is given. The conversion disk 33 is provided with a plurality of moving holes 331 for the moving rod 32 to pass through. The driving member 31 and the elastic clamping member 34 are respectively arranged at both ends of the moving rod 32. The driving member 31 is rotatably connected to the gun body 1. The driving member 31 is used to drive the moving rod 32 to move along its own length direction. The moving rod 32 vertically passes through the moving hole 331 on the conversion disk 33. The driving member 31 drives the moving rod 32 to move in the direction close to the driving member 31, so that the moving rod 32 and the conversion disk 33 slide relative to each other, and the bevel gear 2 51 moves with the moving rod 32.

[0042] Reference Figure 3 and Figure 4 The large ends of all bevel gears are fixedly connected with convex rings, and the conversion disk 33 is provided with an annular groove adapted to the convex ring. When the bevel gear 2 51 moves with the moving rod 32 to conflict with the conversion disk 33, the convex ring corresponds to the annular groove. When the moving rod 32 continues to move, the convex ring enters the annular groove, so that the bevel gear 2 51 is connected to the conversion disk 33.

[0043] Reference Figure 3 and Figure 5When the moving rod 32 continues to move, the elastic clamping member 34 is deformed, so that the elastic clamping member 34 is separated from the clamping groove 511 of the bevel gear 2 51. At this time, the external switching device 2 (refer to Figure 2 ) The driving member 31 in the inner part drives the moving rod 32 to move, so that the bevel gear five 61 is connected to the conversion disk 33, and the bevel gear five 61 is separated from the moving rod 32.

[0044] Reference Figure 3 and Figure 5 The elastic clamping member 34 includes a plurality of clamping springs 341, a plurality of moving blocks 342 and a plurality of balls 343. The clamping springs 341 are fixedly connected to the moving blocks 342 and the moving rod 32, respectively. The moving rod 32 is provided with a moving groove adapted to the moving block 342. The clamping springs 341 are located in the corresponding moving grooves. The balls 343 are rotatably connected to one end of the moving block 342 away from the clamping springs 341. When the moving rod 32 and the bevel gear 2 51 are relatively displaced, the clamping grooves 511 exert a force on the balls 343 toward the inside of the moving grooves, so that the balls 343 drive the moving blocks 342 to move into the moving grooves and compress the clamping springs 341 at the same time. When the elastic clamping member 34 is separated from the clamping grooves 511, the moving blocks 342 are reset under the elastic force of the clamping springs 341.

[0045] Reference Figure 2 and Figure 4 The gun body 1 is fixedly connected with a rotating motor, and the output shaft of the rotating motor is fixedly connected with the conversion disk 33 in the gun body 1. The rotating motor drives the conversion disk 33 in the gun body 1 to rotate, so that the bevel gear 51 (refer to Figure 3 ) rotates with the conversion disk 33, and the bevel gear 3 52 (refer to Figure 3 ) is rotated to a position corresponding to the moving rod 32. The conversion disk 33 in the gun body 1 is slidably connected with a transmission rod 36, and one end of the transmission rod 36 passes through the conversion disk 33 in the external switching device 2 and is slidably connected with the conversion disk 33 in the external switching device 2.

[0046] Reference Figure 3 and Figure 4 The conversion disk 33 in the gun body 1 rotates, driving the transmission rod 36 to slide relative to the conversion disk 33, and at the same time, the other end of the rotating rod slides relative to the conversion disk 33 in the external switching device 2, thereby driving the external switching device 2 (refer to Figure 2 ) rotates, so that the bevel gear 62 moves to a position corresponding to the moving rod 32. The transmission rod 36 is located between the center of the conversion disk 33 and the bevel gear, so that the rotation track of the transmission rod 36 does not interfere with the connecting piece 611, ensuring the normal operation of the transmission rod 36. At the same time, the moving rod 32 in the gun body 1 is located below the output shaft of the rotating motor, and the external switching device 2 (refer to Figure 2) is located at the side of the rotating disk center away from the gun body 1.

[0047] Reference Figure 4 and Figure 6 The transmission rod 36 includes a horizontal rod 361 and a vertical rod 362, between which the gun body 1 and the external switching device 2 (refer to Figure 2 ) are provided with a conversion device 7, the conversion device 7 includes an inner disk 71, an outer disk 72 and a stopper 73, the outer disk 72 is rotatably connected to the outer side of the inner disk 71, and the two inner disks 71 are respectively connected to the cross bar 361 and the outer switching device 2 (refer to Figure 2 ) are fixedly connected, the two outer disks 72 are fixedly connected to the vertical rod 362 and the gun body 1 respectively, and the inner disk 71 and the outer disk 72 rotate relative to each other to change the angle between the cross bar 361 and the vertical rod 362 and the angle between the gun body 1 and the external switching device 2 (refer to Figure 2 ), by providing the limiting member 73, the inner disk 71 and the outer disk 72 are not easily rotated relative to each other during the operation of the hand drill.

[0048] Reference Figure 6 The limiting member 73 includes a rotating ball 731, a connecting block 732 and a limiting spring 733. The two ends of the limiting spring 733 are fixedly connected to the inner disk 71 and the connecting block 732 respectively. The rotating ball 731 is rotatably connected to the end of the connecting block 732 away from the limiting spring 733. The outer disk 72 is provided with a plurality of limiting grooves adapted to the ball 343. In the initial state, the ball 343 is located in the limiting groove. When the outer disk 72 and the inner disk 71 rotate relative to each other, the limiting groove exerts a force on the ball 343 toward the center of the inner disk 71, so that the ball 343 and the connecting block 732 move, and the limiting spring 733 is compressed, so that the outer disk 72 and the inner disk 71 rotate relative to each other smoothly. At the same time, the limiting groove can limit the ball 343, so that when the hand drill is working, the inner disk 71 and the outer disk 72 do not rotate easily.

[0049] Reference Figure 2 and Figure 4 When the external switching device 2 and the gun body 1 rotate relative to each other, the driving member 31 works again, and the driving member 31 drives the moving rod 32 to move toward the direction close to the conversion disk 33, and the moving rod 32 enters the bevel gear 3 52 (refer to Figure 3 ) in the movable hole 331 corresponding to the gun body 1, the limit plate 35 in the gun body 1 is rotatably connected to the gun body 1, and the limit plate 35 rotates so that one side of the limit plate 35 is connected to the bevel gear 3 52 (refer to Figure 3 )’s little end conflicts with the other.

[0050] Reference Figure 3 and Figure 5 At this time, the moving rod 32 continues to move, and the limit plate 35 (refer to Figure 2) ensures that the bevel gear 3 52 and the conversion plate 33 are not separated at this time, the elastic clamping member 34 enters the clamping groove 511 of the bevel gear 3 52, so that the bevel gear 3 52 is connected to the moving rod 32, and the limiting plate 35 (refer to Figure 2 ) rotates, the moving rod 32 continues to move, so that the bevel gear three 52 is separated from the conversion disk 33.

[0051] Reference Figure 2 and Figure 3 At the same time, the moving rod 32 in the outer switching device 2 is connected to the bevel gear 62, the limit plate 35 in the outer switching device 2 is rotatably connected to the outer switching device 2, and the bevel gear 62 is separated from the conversion plate 33 in the outer switching device 2, and the bevel gear 3 52 is meshed with the bevel gear 6 62, ensuring that the transmission device 4 (refer to Figure 4 ) can drive the drill fixture 9 to rotate.

[0052] Reference Figure 3 and Figure 4 The connecting piece 611 is a push rod, and the connecting piece 611 is fixedly connected to the small end side of the bevel gear of the second bevel gear set 6. The cross-section of the push rod is polygonal. The upper end surface of the drill bit fixture 9 is provided with a groove adapted to the push rod. When the bevel gear three 52 is engaged with the bevel gear six 62, the lower end of the push rod is inserted into the groove, so that the bevel gear six 62 can drive the drill bit fixture 9 to rotate through the push rod.

[0053] Reference Figure 4 and Figure 5 The clamping grooves 511 are all opened at the large end of the bevel gear. The groove wall of the clamping groove 511 includes an upper wall 512 and a lower wall 513. The upper wall 512 is located at one end of the lower wall 513 close to the bottom of the clamping groove 511. When the elastic clamping member 34 is connected to the clamping groove 511, the ball 343 first conflicts with the lower wall 513, and then enters the space between the upper wall 512 and the bottom of the groove. The upper wall 512 is smoothly connected to the lower wall 513, and the connection between the upper wall 512 and the lower wall 513 is the smallest diameter of the clamping groove 511. The curvature of the upper wall 512 is greater than the curvature of the lower wall 513, so that the elastic clamping member 34 is subjected to less resistance when entering the clamping groove 511, which is convenient for the connection between the moving rod 32 and the bevel gear. The elastic clamping member 34 is subjected to greater resistance when it is separated from the clamping groove 511, ensuring that the connection between the bevel gear and the conversion disk 33 is tighter.

[0054] Reference Figure 2The external switching device 2 is connected to an adjustable bracket 8, which includes a plurality of legs 81 and a sleeve 82. The sleeve 82 is slidably connected to the external switching device 2, and an adjustment device for adjusting the angle of the legs 81 is provided between the legs 81 and the sleeve 82. The worker uses the adjustment device to adjust the angle of the legs 81 so that the legs 81 are parallel to the external switching device 2, which facilitates the external switching device 2 to enter a relatively narrow space. At the same time, the adjustable legs 81 are opened outward, and the legs 81 are erected on a plane. When the hand drill is working, the external switching device 2 and the sleeve 82 slide relative to each other, and the sleeve 82 limits the external switching device 2 to ensure that the drill bit connected to the external switching device 2 does not deflect during the movement.

[0055] Reference Figure 2 The adjusting device includes a moving member 831, a first moving ring 832, a second moving ring 833, a plurality of transmission members 834 and a plurality of rotating members 835 matched with the transmission member 834. The transmission member 834 is a rack. The rotating member 835 includes a hollow sleeve and a gear. The gear is fixedly connected to the hollow sleeve. The hollow sleeve is provided with a rotating cavity so that the gear can mesh with the rack. The moving member 831 is fixedly connected to the outside of the sleeve 82. All the transmission members 834 are fixedly connected to the first moving ring 832. The moving member 831 drives the first moving ring 832 to slide relative to the sleeve 82, so that all the transmission members 834 move downward with the first moving ring 832.

[0056] Reference Figure 2 The second moving ring 833 is a polygonal ring, and the rotating member 835 is rotatably connected to the second moving ring 833 at equal intervals, that is, the hollow sleeve is rotatably connected to the edge of the second moving ring 833 at equal intervals, and the rack is meshed with the gear, driving the gear to rotate, thereby driving the hollow sleeve to rotate, and the legs 81 are fixedly connected to the corresponding rotating member 835. When the gear rotates, the hollow sleeve and the corresponding edge of the second moving ring 833 rotate relative to each other, so that the legs 81 rotate together with the hollow sleeve, and the angle between the legs 81 and the external switching device 2 changes, so that the adjustable bracket 8 opens outward, playing a supporting and fixing role.

[0057] Reference Figure 4The transmission device 4 includes a driving motor 41, a worm wheel 42, a worm 43 and a transmission plate 44. The transmission plate 44 is fixedly connected to the moving rod 32 in the gun body 1. The transmission plate 44 is located between the worm wheel 42 and the driving member 31. The output shaft of the driving motor 41 is fixedly connected to the worm 43. The driving motor 41 drives the worm 43 to rotate, thereby driving the worm wheel 42 to rotate. A transmission groove adapted to the transmission plate 44 is provided on the side of the worm wheel 42 close to the driving member 31. When the driving member 31 drives the moving rod 32 to move so that the two bevel gears connected to the moving rod 32 are meshed, the transmission plate 44 is located in the transmission groove. When the internal switching device 3 switches between the bevel gears, the transmission plate 44 moves with the moving rod 32, and the transmission plate 44 is separated from the worm wheel 42 to avoid accidentally touching the switch during the switching process, which causes damage to the hand drill.

[0058] The implementation principle of a steering hand drill in the embodiment of the present application is as follows: the driving member 31 drives the moving rod 32 to move along the length direction of the moving rod 32, so that the moving rod 32 drives the bevel gear to move, so that the bevel gear is connected to the conversion disk 33 and separated from the moving rod 32 at the same time, and the conversion disk 33 is rotated again to rotate the other bevel gear to a position corresponding to the moving rod 32, and the moving rod 32 moves again to be connected to the other bevel gear, driving the bevel gear to move, and at the same time, the external switching device 2 and the gun body 1 rotate, and the horizontal rod 361 and the vertical rod 362 rotate, so that the new pair of bevel gears mesh with each other, ensuring that the transmission device 4 can drive the drill clamp 9 and the drill bit to rotate. The steering hand drill can make the drill bit and the gun body 1 present multiple angles, and the drill bit can achieve multi-angle steering, which can adapt to various working conditions and is more convenient to use.

[0059] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A steering hand drill, characterized in that: The invention comprises a gun body (1) and an external switching device (2), wherein the gun body (1) is rotatably connected to the external switching device (2), the gun body (1) is provided with a transmission device (4), a drill bit fixture (9) is rotatably connected to the lower part of the external switching device (2), a first bevel gear set (5) and a second bevel gear set (6) both comprise a plurality of bevel gears of different sizes, an internal switching device (3) is arranged inside the gun body (1) and the external switching device (2), the internal switching device (3) comprises a driving member (31), a moving rod (32), a conversion disk (33), an elastic clamping member (34) and a limit plate (35), the conversion disks (33) of the two internal switching devices (3) are respectively detachably connected to the first bevel gear set (5) and the second bevel gear set (6), and all the bevel gears rotate around corresponding The conversion disk (33) is arranged at equal angles to the center of the conversion disk (33), the conversion disk (33) is provided with a plurality of moving holes (331) for the moving rod (32) to pass through, the driving member (31) and the elastic clamping member (34) are respectively arranged at the two ends of the moving rod (32), the two limit plates (35) are respectively rotatably connected to the gun body (1) and the external switching device (2), the bevel gears of the first bevel gear group (5) and the bevel gears of the second bevel gear group (6) are both provided with clamping grooves (511) matched with the elastic clamping member (34), the first bevel gear group (5) is located inside the gun body (1), the second bevel gear group (6) is located inside the external switching device (2), and the bevel gears of the second bevel gear group (6) are both provided with connecting members (611) for connecting with the drill clamp (9); The first bevel gear set (5) comprises bevel gear 1, bevel gear 2 (51) and bevel gear 3 (52), and the second bevel gear set (6) comprises bevel gear 4, bevel gear 5 (61) and bevel gear 6 (62). Bevel gear 1 and bevel gear 4 can mesh with each other and the angle between their rotation axes is an acute angle, bevel gear 2 (51) and bevel gear 5 (61) can mesh with each other and the angle between their rotation axes is a right angle, and bevel gear 3 (52) and bevel gear 6 (62) can mesh with each other and the angle between their rotation axes is an obtuse angle.

2. A steering hand drill according to claim 1, characterized in that: The connecting piece (611) for connecting the drill bit fixture (9) is a push rod, and the connecting piece (611) for connecting the drill bit fixture (9) is fixedly connected to the small end side of the bevel gear of the second bevel gear set (6), the push rod has a polygonal cross section, and the upper end surface of the drill bit fixture (9) is provided with a groove adapted to the push rod.

3. A steering hand electric drill according to claim 1, characterized in that: The conversion disk (33) in the gun body (1) is slidably connected to a transmission rod (36), one end of the transmission rod (36) passes through the conversion disk (33) in the external switching device (2) and is slidably connected to the conversion disk (33) in the external switching device (2), and the transmission rod (36) is located between the center of the conversion disk (33) and the bevel gear.

4. A steering hand electric drill according to claim 3, characterized in that: The transmission rod (36) comprises a crossbar (361) and a vertical rod (362). A conversion device (7) is provided between the crossbar (361) and the vertical rod (362) and between the gun body (1) and the external switching device (2). The conversion device (7) comprises an inner disk (71), an outer disk (72) and a limiting member (73). The limiting member (73) comprises a rotating ball (731), a connecting block (732) and a limiting spring (733). Two ends of the limiting spring (733) are respectively fixedly connected to the inner disk (71) and the connecting block (732). The rotating ball (731) is rotatably connected to one end of the connecting block (732) away from the limiting spring (733). The outer disk (72) is rotatably connected to the outer side of the inner disk (71). The outer disk (72) is provided with a plurality of limiting grooves adapted to the ball bearings (343).

5. The steering hand electric drill according to claim 1, characterized in that: The clamping grooves (511) are all opened at the large end of the bevel gear, and the groove wall of the clamping groove (511) comprises an upper wall (512) and a lower wall (513), the upper wall (512) is located at one end of the lower wall (513) close to the groove bottom of the clamping groove (511), the upper wall (512) and the lower wall (513) are smoothly connected, and the connection between the upper wall (512) and the lower wall (513) is the smallest diameter of the clamping groove (511), and the curvature of the upper wall (512) is greater than the curvature of the lower wall (513).

6. The steering hand electric drill according to claim 1, characterized in that: The elastic clamping member (34) comprises a plurality of clamping springs (341), a plurality of moving blocks (342) and a plurality of balls (343); the two ends of the clamping spring (341) are respectively fixedly connected to the moving block (342) and the moving rod (32); the balls (343) are rotatably connected to one end of the moving block (342) away from the clamping spring (341); the moving rod (32) is provided with a moving groove adapted to the moving block (342); and the clamping spring (341) is located in the corresponding moving groove.

7. The steering hand electric drill according to claim 1, characterized in that: The external switching device (2) is externally connected to an adjustable bracket (8), the adjustable bracket (8) comprising a plurality of legs (81) and a sleeve (82), the sleeve (82) being slidably connected to the outside of the external switching device (2), and an adjustment device for adjusting the angle of the legs (81) being provided between the legs (81) and the sleeve (82).

8. The steering hand electric drill according to claim 7, characterized in that: The adjusting device comprises a moving member (831), a first moving ring (832), a second moving ring (833), a plurality of transmission members (834) and a plurality of rotating members (835) matched with the transmission members (834); the moving member (831) is fixedly connected to the outside of the sleeve (82); all the transmission members (834) are fixedly connected to the first moving ring (832); the legs (81) are respectively fixedly connected to the corresponding rotating members (835); the second moving ring (833) is a polygonal ring; the rotating members (835) are rotatably connected to the second moving ring (833) at equal intervals.

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