Handheld pressing type intelligent electric screwdriver

Abstract

The utility model provides a handheld down-pressing type intelligent electric screwdriver which comprises a main shell, a driving motor, a transmission assembly, a screwdriver rod fixing assembly, an elastic piece, a magnetic piece, a control circuit board and a Hall switch, and the driving motor and the transmission assembly are arranged in the main shell; the head end of the transmission assembly is connected with an output shaft of the driving motor, and the head end of the batch rod fixing assembly is in axial sliding connection with the tail end of the transmission assembly and is driven by the driving motor and the transmission assembly to rotate. The elastic piece is installed between the screwdriver rod fixing assembly and the transmission assembly. The magnetic part is fixed to the screwdriver rod fixing assembly and moves synchronously along with the screwdriver rod fixing assembly, the Hall switch is electrically connected with the control circuit board, and the Hall switch outputs a preset level to the control circuit board when sensing that a magnetic field signal of the magnetic part is larger than a preset threshold value so that the control circuit board can conduct locking turn number counting. The screw locking precision of the down-pressing type intelligent electric screwdriver can be improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of electric tools, more particularly to a hand-held down-pressing type intelligent electric screwdriver. BACKGROUND

[0002] In modern industrial production and assembly operations, electric screwdrivers, as a commonly used tool, are widely used in screw tightening and disassembly operations. The traditional electric screwdriver has some deficiencies in use, such as errors in the number of locking during screw locking, which leads to failure to lock or over-tightening. SUMMARY

[0003] The utility model solves the technical problem that the number of locking is not accurate when the electric screwdriver is used to lock screws, and provides a hand-held down-pressing type intelligent electric screwdriver.

[0004] The utility model solves the technical problem that the number of locking is not accurate when the electric screwdriver is used to lock screws, and provides a hand-held down-pressing type intelligent electric screwdriver.

[0005] The first end of the transmission assembly is connected to the output shaft of the drive motor, the first end of the screw rod fixing assembly is inserted into the main shell and axially slidingly connected to the tail end of the transmission assembly, and the screw rod fixing assembly rotates under the drive of the drive motor and the transmission assembly; the elastic member is installed between the screw rod fixing assembly and the transmission assembly and pushes the tail end of the screw rod fixing assembly to move away from the transmission assembly;

[0006] The magnetic member is fixed on the screw rod fixing assembly and moves synchronously with the screw rod fixing assembly, the Hall switch is electrically connected to the control circuit board, and the Hall switch is located on the axial movement path of the magnetic member and outputs a preset level to the control circuit board to count the number of locking when the magnetic field signal of the magnetic member is greater than the preset threshold.

[0007] As a further improvement of the utility model, the transmission assembly includes a speed reducer, a torque sensor, and a transmission rod; the input end of the speed reducer is connected to the output shaft of the drive motor, one end of the torque sensor is connected to the output end of the speed reducer, the other end of the torque sensor is connected via the transmission rod, and the first end of the screw rod fixing assembly is axially slidingly connected to the transmission rod; the control circuit board is electrically connected to the sampling board of the torque sensor.

[0008] As a further improvement of the utility model, the main casing is internally provided with a bracket connecting piece, the bracket connecting piece is provided with a central through hole, the control circuit board is annular, the Hall switch is welded on the control circuit board, and the control circuit board is fixed on the end face of the bracket connecting piece towards the batch rod fixing assembly in a coaxial manner with the bracket connecting piece and with the Hall switch facing away from the bracket connecting piece; the transmission rod is connected with the batch rod fixing assembly after penetrating through the central through hole of the bracket connecting piece and the control circuit board.

[0009] As a further improvement of the utility model, the tail end of the main casing is provided with a fixing seat, the batch rod fixing assembly comprises a batch rod mounting head and a bearing; the fixing seat comprises a containing cavity, a first opening at the head end of the containing cavity and a second opening at the tail end of the containing cavity, and the first opening of the fixing seat faces the transmission assembly; the head end of the batch rod mounting head is inserted into the containing cavity of the fixing seat through the second opening and is assembled with the fixing seat through the bearing in the containing cavity; the tail end of the transmission rod is inserted into the containing cavity through the first opening and is axially slidably connected with the head end of the batch rod mounting head.

[0010] As a further improvement of the utility model, the Hall switch is inserted into the containing cavity through the first opening, and the magnetic member is annular and is sleeved on the outer periphery of the portion of the batch rod mounting head located in the containing cavity.

[0011] As a further improvement of the utility model, the batch rod mounting head comprises an axial through hole, and the transmission rod is axially slidably connected with the batch rod mounting head in a manner that the head end of the transmission rod is inserted into the axial through hole.

[0012] The batch rod fixing assembly comprises a limiting piece, the limiting piece is inserted into the axial through hole from the tail end of the axial through hole and is fixed with the batch rod mounting head, the elastic piece is composed of a spring located in the axial through hole, and the two ends of the spring are respectively abutted with the transmission rod and the limiting piece.

[0013] As a further improvement of the utility model, the batch rod fixing assembly comprises an appearance fixing ring and a loose batch rod movable ring, and the batch rod of the hair clip is locked and fixed with the batch rod mounting head through the appearance fixing ring and the loose batch rod movable ring.

[0014] As a further improvement of the utility model, the main casing comprises a handle main body and a fixing ring, the driving motor and the transmission assembly are assembled in the handle main body, and the fixing seat is assembled with the handle main body through the fixing ring.

[0015] As a further improvement of the utility model, the head end of the main casing is provided with an aviation socket and a connecting hanging rod.

[0016] As a further improvement of the utility model, the outer surface of the main shell is provided with a pressing key, and the pressing key triggers the switch element on the control circuit board through the rod passing through the main shell.

[0017] The utility model has the advantages that: through the cooperation of the magnetic member and the Hall switch, a signal for counting the locking circle number is generated when the bit head overcomes the elastic force of the elastic member, thereby improving the screw locking precision of the down-pressing type intelligent electric screwdriver. BRIEF DESCRIPTION OF DRAWINGS

[0018] Figure 1 is the schematic diagram of the hand-held down-pressing type intelligent electric screwdriver provided by the utility model embodiment.

[0019] Figure 2 is the exploded structure schematic diagram of the hand-held down-pressing type intelligent electric screwdriver provided by the utility model embodiment.

[0020] Figure 3 is the connection schematic diagram of the bit rod mounting head and the transmission assembly in the hand-held down-pressing type intelligent electric screwdriver provided by the utility model embodiment.

[0021] Figure 4 is the cross-sectional structure schematic diagram of the connection of the bit rod mounting head and the transmission assembly in the hand-held down-pressing type intelligent electric screwdriver provided by the utility model embodiment. DETAILED DESCRIPTION

[0022] In order to make the purpose, technical scheme and advantages of the utility model clearer and more apparent, the utility model will be further described in detail below in combination with the drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the utility model and not to limit the utility model.

[0023] As Figures 1-4 shown, is the structure schematic diagram of the hand-held down-pressing type intelligent electric screwdriver provided by the utility model embodiment, and the hand-held down-pressing type intelligent electric screwdriver can be used for screw locking. The hand-held down-pressing type intelligent electric screwdriver in the embodiment includes a main shell 10, a driving motor 20, a transmission assembly 30, a bit rod fixing assembly 40, an elastic member 53, a magnetic member 51, a control circuit board 52 and a Hall switch 521, wherein the main shell 10 is made of metal, engineering plastic or other hard materials and is in a cylindrical shape for easy holding, the driving motor 20 and the transmission assembly 30 are respectively arranged in the main shell 10. Specifically, the driving motor 20 can adopt a servo motor, which can accurately control the speed and phase, and the first end of the transmission assembly 30 is connected with the output shaft of the driving motor 20, that is, the transmission assembly 30 can rotate synchronously with the output shaft of the driving motor 20, in particular, in order to reduce the radial size of the hand-held down-pressing type intelligent electric screwdriver for easy holding, the above-mentioned transmission assembly 30 and driving motor 20 are coaxial in the main shell 10. In addition, the above-mentioned main shell 10 can adopt an ergonomic design to improve the grip feeling.

[0024] The batch rod fixing assembly 40 is used for mounting the batch head 60, and specifically, the batch head 60 can be mounted to the tail end of the batch rod fixing assembly 40. The head end of the batch rod fixing assembly 40 is inserted into the main housing 10 and axially slidably connected to the tail end of the transmission assembly 30, so that the transmission assembly 30 can transmit the torque output by the driving motor 20 to the batch rod fixing assembly 40, so that the batch rod fixing assembly 40 rotates under the driving of the driving motor 20 and the transmission assembly 30, and the batch rod fixing assembly 40 can move axially relative to the transmission assembly 30. The elastic member 53 is mounted between the batch rod fixing assembly 40 and the transmission assembly 30, and pushes the tail end of the batch rod fixing assembly 40 to move away from the transmission assembly 30 by the elastic restoring force of the elastic member 53, that is, the batch rod fixing assembly 40 is pushed to move towards the transmission assembly 30 (for example, when the screw is locked), so that the elastic member 53 is compressed and deformed; after the batch rod fixing assembly 40 is released, the elastic member 53 pushes the batch rod fixing assembly 40 to move away from the transmission assembly 30 by the elastic restoring force.

[0025] The magnetic member 51 is fixed on the batch rod fixing assembly 40 and moves synchronously with the batch rod fixing assembly 40, the Hall switch 521 is electrically connected to the control circuit board 52, and the Hall switch 521 is located on the axial movement path of the magnetic member 51 (that is, the magnetic member 51 passes through the Hall switch 521 when moving axially with the batch rod fixing assembly 40), and the Hall switch 521 outputs a preset level to the control circuit board 52 to make the control circuit board 52 count the locking turns when sensing that the magnetic field signal of the magnetic member 51 is greater than a preset threshold. Specifically, the Hall switch 521 is located on the axial movement path of the magnetic member 51 close to the end point of the transmission assembly 30.

[0026] In this way, when the screw is locked by the above-mentioned handheld down-pressing type intelligent electric batch, the batch head 60 abuts against the screw and is pressed down, the magnetic member 51 moves axially synchronously and triggers the Hall switch 521 to generate a corresponding signal, the driving motor 20 starts to rotate, and at the same time, the control circuit board 52 starts to count the number of rotations (for example, by calculating the number of rotations of the driving motor 20), thereby improving the screw locking accuracy of the handheld down-pressing type intelligent electric batch. The Hall switch 521 and the control circuit board 52 can both adopt the conventional technology in the art, which will not be described here.

[0027] In an embodiment of the utility model, the transmission assembly 30 comprises speed reducer 31, torque sensor 32 and transmission rod 34, wherein, the input of speed reducer 31 is connected with the output shaft of driving motor 20, one end (axial) of torque sensor 32 is connected with the output of speed reducer 31, the other end (axial) of torque sensor 32 is connected with transmission rod 34, and the leading end of batch rod fixing assembly 40 is axially slidingly connected with transmission rod 34. Control circuit board 52 is electrically connected with the sampling board of torque sensor 32. By using speed reducer 31 and torque sensor 32 in transmission assembly 30, on the one hand, the output torque of the handheld down-pressing type intelligent electric batcher can be increased, and on the other hand, the output torque of the handheld down-pressing type intelligent electric batcher can be monitored, thereby further improving the screw locking accuracy. The speed reducer 31 and torque sensor 32 can all adopt the conventional structure in the art, which will not be described here.

[0028] In an embodiment of the utility model, a support connecting piece 33 is arranged in the main shell 10, the support connecting piece 33 has a central through hole, the control circuit board 52 is annular (i.e. the control circuit board 52 has a through hole), the Hall switch 521 is welded on the control circuit board 52, the control circuit board 52 is fixed on the end face of the support connecting piece 33 towards the batch rod fixing assembly 40, and the control circuit board 52 is coaxial with the support connecting piece 33 and the Hall switch 521 faces away from the support connecting piece 33. The transmission rod 34 is connected with the batch rod fixing assembly 40 after passing through the central through hole of the support connecting piece 33 and the control circuit board 52. The above structure facilitates the assembly of the control circuit board 52 and the Hall switch 521.

[0029] In an embodiment of the utility model, the main shell 10 comprises a fixing seat 13, correspondingly, the batch rod fixing assembly 40 comprises a batch rod mounting head 42 and a bearing 43, specifically, the batch rod mounting head 42 can be cylindrical as a whole. The fixing seat 13 comprises a containing cavity 131, a first opening at the leading end (axial) of the containing cavity 131 and a second opening at the trailing end (axial) of the containing cavity 131, and the fixing seat 13 is connected to the trailing end of the main shell 10 with the first opening facing the main shell 10; the leading end of the batch rod mounting head 42 is inserted into the containing cavity 131 of the fixing seat 13 through the second opening and assembled with the fixing seat 13 through the bearing 43 in the containing cavity 131; the transmission rod 34 is inserted into the containing cavity 131 through the first opening and axially slidingly connected with the leading end of the batch rod mounting head 42. Specifically, the leading end of the batch rod mounting head 42 can have an axial sliding groove, the transmission rod 34 and the sliding groove have the same non-circular cross section (for example, hexagonal), and the end of the transmission rod 34 is inserted into the sliding groove of the batch rod mounting head 42, so that the batch rod mounting head 42 can move axially relative to the transmission rod 34 and can rotate under the driving of the transmission rod 34.

[0030] In particular, the Hall switch 521 is inserted into the accommodating cavity 131 through the first opening of the fixing seat 13, and the magnetic member 51 is annular and sleeved on the outer periphery of the portion of the batch rod mounting head 42 located in the accommodating cavity 131. In this way, when the batch rod mounting head 42 moves axially, the magnetic member 51 moves axially synchronously with the batch rod mounting head 42. In order to avoid wear of the magnetic member 51, the magnetic member 51 can be fixed with the batch rod mounting head 42, that is, when the batch rod mounting head 42 rotates, the magnetic member 51 rotates synchronously, and the annular magnetic member 51 does not affect the stability of the rotation of the batch rod mounting head 42.

[0031] In an embodiment of the utility model, the batch rod mounting head 42 comprises an axial through hole 421 (that is, the sliding groove is formed by a part of the axial through hole 421, and the shape of the cross section of the axial through hole 421 is same as the shape of the batch rod of the batch head 60), and the transmission rod 34 is inserted into the leading end of the axial through hole 421, so as to be axially slidingly connected with the batch rod mounting head 42. Correspondingly, the batch rod fixing assembly 40 further comprises a limiting member 44, the leading end of the limiting member 44 is inserted into the axial through hole 421 from the trailing end of the axial through hole 421 and is fixed with the batch rod mounting head 42, and the batch rod of the batch head 60 can be inserted into the axial through hole 421 and abut against the trailing end of the limiting member 44. The elastic member 53 is formed by a spring located in the axial through hole 421, and the two ends of the spring abut against the transmission rod 34 and the limiting member 44 respectively.

[0032] In addition, the batch rod fixing assembly 40 further comprises an appearance fixing ring 45 and a loose batch rod movable ring 46, and the batch rod of the batch head 60 is locked and fixed with the batch rod mounting head 42 through the appearance fixing ring 45 and the loose batch rod movable ring 46. Through the appearance fixing ring 45 and the loose batch rod movable ring 46, different specifications of batch heads 60 can be assembled on the handheld down-pressing type intelligent electric batcher. The appearance fixing ring 45 and the loose batch rod movable ring 46 can adopt existing structures, which will not be described here.

[0033] In an embodiment of the utility model, the main shell 10 further comprises a handle main body 11 and a fixing ring 12, wherein the driving motor 20 and the transmission assembly 30 are assembled in the handle main body 11, and the fixing seat 13 is assembled with the handle main body 11 through the fixing ring 12.

[0034] In addition, the leading end of the main shell 10 is provided with an aviation socket 15 and a connecting hanging rod 16. Through the aviation socket 15, the handheld down-pressing type intelligent electric batcher can be connected with a host computer, so that relevant data can be read through the host computer or control data such as the number of turns and torque of screw locking can be written into the handheld down-pressing type intelligent electric batcher through the host computer. The connecting hanging rod 16 can realize hanging placement of the handheld down-pressing type intelligent electric batcher. In particular, as shown in FIG. 6, the connecting hanging rod 16 is provided with a plurality of hanging holes 161, and the hanging holes 161 are arranged in a staggered manner. Figure 1 、 Figure 2As shown, the above-mentioned aviation socket 15 and connecting boom 16 can be assembled to the head end of the handle main body 11 through the end cover 17.

[0035] The outer side surface of the main housing 10 has a press key 18, and the press key 18 triggers the switch element on the control circuit board 52 through the rod 19 running in the main housing 10. Through the press key 18, the rod 19 can be pushed to move axially, and the switch element on the control circuit board 52 is pushed by the rod 19, so as to trigger the start of the handheld down-pressing smart electric screwdriver. After the start of the handheld down-pressing smart electric screwdriver, the screw is pressed by the bit 60, so that the driving motor 20 is started to perform screw locking.

[0036] The above is only the preferred specific implementation of the present application, but the protection scope of the present application is not limited to this. Any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered in the protection scope of the present application. Therefore, the protection scope of the present application should be subject to the protection scope of the claims.

Claims

1. A hand-held, push-down, smart electric screwdriver, characterized in that Including main shell, drive motor, transmission assembly, batch rod fixed assembly, elastic piece, magnetic piece, control circuit board and hall switch, the main shell is cylindrical and is convenient for hand holding, and the drive motor and transmission assembly are respectively installed in the main shell; The first end of the transmission assembly is connected with the output shaft of the drive motor, the first end of the batch rod fixed assembly is inserted into the main shell and is axially slidably connected with the tail end of the transmission assembly, and the batch rod fixed assembly rotates under the drive of the drive motor and the transmission assembly; the elastic piece is installed between the batch rod fixed assembly and the transmission assembly and pushes the tail end of the batch rod fixed assembly to move away from the transmission assembly; The magnetic piece is fixed on the batch rod fixed assembly and moves synchronously with the batch rod fixed assembly, the hall switch is electrically connected with the control circuit board, and the hall switch is located on the axial movement path of the magnetic piece and outputs a preset level to the control circuit board when the magnetic field signal of the magnetic piece is greater than a preset threshold, so that the control circuit board performs lock number counting.

2. The hand held, smart screwdriver of claim 1, wherein, The transmission assembly includes a speed reducer, a torque sensor, and a transmission rod; the input end of the speed reducer is connected with the output shaft of the drive motor, one end of the torque sensor is connected with the output end of the speed reducer, the other end of the torque sensor is connected via the transmission rod, and the first end of the batch rod fixed assembly is axially slidably connected with the transmission rod; the control circuit board is electrically connected with the sampling board of the torque sensor.

3. The hand held, smart screwdriver of claim 2, wherein, The main shell is provided with a support connecting piece, the support connecting piece has a central through hole, the control circuit board is annular, the hall switch is welded on the control circuit board, and the control circuit board is fixed on the end face of the support connecting piece facing the batch rod fixed assembly in a coaxial manner with the support connecting piece and with the hall switch facing away from the support connecting piece; the transmission rod passes through the central through hole of the support connecting piece and the control circuit board and is connected with the batch rod fixed assembly.

4. The hand held down pressure smart electric screwdriver of claim 3, wherein, The tail end of the main shell has a fixing seat, the batch rod fixed assembly includes a batch rod mounting head and a bearing; the fixing seat includes a containing cavity, a first opening at the first end of the containing cavity, and a second opening at the tail end of the containing cavity, and the first opening of the fixing seat faces the transmission assembly; the first end of the batch rod mounting head is inserted into the containing cavity of the fixing seat through the second opening and is assembled with the fixing seat through the bearing in the containing cavity; the tail end of the transmission rod is inserted into the containing cavity through the first opening and is axially slidably connected with the first end of the batch rod mounting head.

5. The hand held down pressure smart electric screwdriver of claim 4, wherein, The hall switch is inserted into the containing cavity through the first opening, the magnetic piece is annular and is sleeved on the outer periphery of the portion of the batch rod mounting head in the containing cavity.

6. The hand held down pressure smart electric screwdriver of claim 4, wherein, The batch rod mounting head includes an axial through hole, and the transmission rod is axially slidably connected with the batch rod mounting head by inserting the first end into the axial through hole. The batch rod fixing assembly comprises a limiting piece inserted into the axial through hole from the tail end and fixed with the batch rod mounting head, and the elastic piece is composed of a spring located in the axial through hole, and the two ends of the spring are respectively in abutment with the transmission rod and the limiting piece.

7. The hand held down pressure smart electric screwdriver of claim 6, wherein, The batch rod fixing assembly comprises an appearance fixing ring and a loose batch rod movable ring, and the batch rod of the hairpiece is locked and fixed with the batch rod mounting head through the appearance fixing ring and the loose batch rod movable ring.

8. The hand held down pressure smart electric screwdriver of claim 4, wherein, The main shell comprises a handle main body and a fixing ring, the driving motor and the transmission assembly are assembled in the handle main body, and the fixing seat is assembled with the handle main body through the fixing ring.

9. The hand held down pressure smart electric screwdriver of claim 1, wherein, The first end of the main shell is provided with an aviation socket and a connecting hanging rod.

10. The hand held down pressure smart electric screwdriver of claim 1, wherein, The outer surface of the main shell is provided with a pressing key, and the pressing key triggers a switch element on the control circuit board through a rod passing through the main shell.

Images