Electric screwdriver

Abstract

The utility model discloses an electric screwdriver which comprises a motor sleeve, a fluted disc sleeve and a tool bit sleeve which are sequentially connected in a clamping mode and further comprises a plurality of sets of planetary gear assemblies arranged in the fluted disc sleeve, an inner cavity of the tool bit sleeve is connected with a tool bit connector in a rotating mode, a sealing disc is arranged at the height of the outer side end of the motor sleeve, and a motor is arranged in the motor sleeve. The power end of the motor movably penetrates through the sealing disc and then is fixedly connected with a power gear driving the planetary gear assembly to rotate. According to the electric screwdriver structure designed by the utility model, a plurality of groups of planetary gear assemblies are additionally arranged between the motor and the screwdriver head, and the planetary gear assemblies are clamped and fixedly arranged between the motor sleeve and the screwdriver head sleeve in cooperation with the gear sleeve, so that the electric screwdriver can be operated for a long time during large-torsion operation; the concentricity of the electric screwdriver during rotation can be effectively guaranteed through the planetary gear assembly.

Description

Technical Field

[0001] The utility model relates to the field of screwdrivers, in particular to an electric screwdriver. Background Art

[0002] An electric screwdriver is an electric screw tightening tool, which is widely used in industry and daily life. It can make the disassembly and assembly of screws simple and efficient, saving time and effort. The power source of the electric screwdriver is a servo motor, which drives the torque output shaft (also called tightening shaft, screwdriver bit, etc.) to rotate to turn the screw.

[0003] At present, the main driving components of a traditional electric screwdriver are composed of a motor, a screwdriver connecting sleeve, and a cutter head. The motor directly drives the screwdriver connecting sleeve to drive the cutter head to rotate for operation. However, the overall concentricity of the electric screwdriver with this structural design is poor, and it is easy to deviate when rotating with large torque. Utility Model Content

[0004] The utility model designs an electric screwdriver to solve the technical problems raised in the background technology and proposes the following technical solutions:

[0005] An electric screwdriver comprises a motor sleeve, a toothed disc sleeve, and a cutter head sleeve which are sequentially snap-connected, and also comprises a plurality of planetary gear assemblies arranged inside the toothed disc sleeve, wherein a cutter head connector is rotatably connected to the inner cavity of the cutter head sleeve, a sealing disc is arranged at a height on the outer end of the motor sleeve, a motor is built in the motor sleeve, and a power gear for driving the planetary gear assembly to rotate is fixedly connected to the power end of the motor after movably passing through the sealing disc.

[0006] Preferably, snap-fit ​​grooves are provided on both sides of the toothed disc sleeve, and the toothed disc sleeve is snap-fitted with the motor sleeve and the cutter head sleeve respectively through the snap-fit ​​grooves on both sides.

[0007] Preferably, the planetary gear assembly includes multiple sets of rotating disks clamped in the inner cavity of the gear disk sleeve, multiple sets of plug-in rods are fixedly connected to the inner side of the rotating disk, and multiple sets of movable gears are also arranged on the inner side of the rotating disk, and a plug-in groove is arranged through the center position of the movable gear, and the movable gear is movably connected to the outer side of the plug-in rod through the plug-in groove.

[0008] Preferably, a groove is provided at the center position of the inner side surface of the rotating disk, and a central gear docked in the groove is fixedly connected to the outer side surface of the rotating disk.

[0009] Preferably, the inner wall of the gear disc sleeve is evenly provided with latching teeth, which mesh with the multiple groups of movable gears.

[0010] Preferably, a rectangular groove is provided on the inner side surface of the cutter head connector, and a rectangular head which is clamped in the rectangular groove is fixedly connected to the outer side of the outermost rotating disk.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] The electric screwdriver structure designed by the utility model is characterized by adding multiple sets of planetary gear assemblies between the connection of the motor and the cutter head, and cooperating with the toothed disc sleeve to fix the assembly between the motor sleeve and the cutter head sleeve. Under long-term operation and high-torque operation, the concentricity of the electric screwdriver during rotation can be effectively guaranteed through the planetary gear assembly. The overall installation of the planetary gear assembly and the connection of the outer toothed disc sleeve are cleverly coordinated, the installation operation is also simple, the overall structural setting is reasonable, and the practical effect is significantly improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the structure of the utility model;

[0014] Figure 2 It is a schematic diagram of the structural section of the utility model;

[0015] Figure 3 This is a schematic diagram of the cross-sectional structure of the toothed disc sleeve of the utility model;

[0016] Figure 4 This is a schematic diagram of the structure of the planetary gear assembly of the utility model.

[0017] In the figure: 1-motor sleeve, 2-toothed disc sleeve, 201-clamping groove, 202-clamping teeth, 3-cutter head sleeve, 4-cutter head connector, 401-rectangular groove, 5-sealing disc, 6-motor, 7-power gear, 8-planetary gear assembly, 801-rotating disc, 802-center gear, 803-groove, 804-movable gear, 805-plug-in groove, 806-plug-in rod, 807-rectangular head. DETAILED DESCRIPTION

[0018] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0019] In the description of the present invention, "plurality" means two or more than two, unless otherwise clearly and specifically defined.

[0020] In the description of the present utility model, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "set / connected", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0021] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0022] Reference Manual Attached Figure 1-4 , an electric screwdriver, comprising a motor sleeve 1, a toothed disc sleeve 2, and a cutter head sleeve 3 that are connected in sequence by snapping, and also comprising a plurality of planetary gear assemblies 8 arranged inside the toothed disc sleeve 2, the inner cavity of the cutter head sleeve 3 is rotatably connected with a cutter head connector 4, a sealing disc 5 is arranged at the outer end height of the motor sleeve 1, and a motor 6 is built into the motor sleeve 1, and the power end of the motor 6 is movably penetrated through the sealing disc 5 and is fixedly connected with a power gear 7 that drives the planetary gear assembly 8 to rotate, both sides of the toothed disc sleeve 2 are provided with snap-fitting grooves 201, and the toothed disc sleeve 2 is snap-fitted with the motor sleeve 1 and the cutter head sleeve 3 through the snap-fitting grooves 201 on both sides, the planetary gear assembly 8 comprises a plurality of rotating discs 801 snap-fitted to the inner cavity of the toothed disc sleeve 2, and the inner side of the rotating disc 801 is fixedly connected with There are multiple groups of plug-in rods 806, and the inner side surface of the rotating disk 801 is also provided with multiple groups of movable gears 804, the center position of the movable gear 804 is penetrated by a plug-in groove 805, and the movable gear 804 is movably connected to the outer side of the plug-in rod 806 through the plug-in groove 805, a groove 803 is provided at the center position of the inner side surface of the rotating disk 801, and the outer side surface of the rotating disk 801 is fixedly connected to the central gear 802 docked with the groove 803, the inner wall of the gear disk sleeve 2 is also evenly provided with latch teeth 202, the latch teeth 202 are meshed with the multiple groups of movable gears 804, the inner side surface of the cutter head connector 4 is provided with a rectangular groove 401, and the outer side of the outermost rotating disk 801 is fixedly connected to a rectangular head 807 that is latched in the rectangular groove 401.

[0023] When the device is in use, the power gear 7 at the power end is driven to rotate by the motor 6, and the connecting structure drives the multiple sets of planetary gear assemblies 8 in the gear disc sleeve 2 to rotate synchronously, thereby finally driving the tool head connector 4 to rotate and the connected screwdriver head to rotate.

[0024] When the planetary gear assembly 8 is installed in the toothed disc sleeve 2, the rotating disc 801 with the rectangular head 807 is pre-connected to the left side of the toothed disc sleeve 2 (no central gear is provided on the outer side of the rotating disc 801 of the group), and a stopper is provided on the inner wall of the toothed disc sleeve 2 on this side. The rectangular head 807 is movable through the stopper to facilitate the engagement with the rectangular groove 401 of the inner groove of the cutter head connector 4. At this time, the inner side surface of the rotating disc 801 of the group is still provided with a plug-in rod 806, and then the three groups of movable gears 804 are sleeved on the outer side of the plug-in rod 806 at the inner end of the rotating disc 801, and then the second group of rotating discs 801 and the toothed disc sleeve are connected. 2, the central gear 802 on the outer side of the second group is connected to the groove 803 on the inner side of the upper group of rotating disks 801. In this way, the multiple sets of planetary gear assemblies 8 are fixedly installed in the toothed disc sleeve 2, and then the clamping groove 201 on the right end of the toothed disc sleeve 2 is connected to the outer side of the motor sleeve 1, and the clamping groove 201 on the left side of the toothed disc sleeve 2 is connected to the cutter head sleeve 3, and the power gear 7 at the power end of the motor 6 is meshed and connected between the three sets of movable gears 804 on the inner side of the planetary gear assembly 8 on the right side, and then a special extrusion device is used to squeeze the motor sleeve 1, the toothed disc sleeve 2, and the cutter head sleeve 3 in turn so that the three are clamped and fixed together.

[0025] In the description of the present invention, it is necessary to understand that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention.

Claims

1. An electric screwdriver, comprising a motor sleeve (1), a toothed disc sleeve (2), and a cutter head sleeve (3) which are connected in sequence by snap-fitting, and also comprising a plurality of planetary gear assemblies (8) arranged inside the toothed disc sleeve (2), characterized in that: The inner cavity of the cutter head sleeve (3) is rotatably connected to a cutter head connector (4), a sealing disk (5) is arranged at a height on the outer end of the motor sleeve (1), and a motor (6) is built into the motor sleeve (1), and a power end of the motor (6) is movably penetrated through the sealing disk (5) and is fixedly connected to a power gear (7) that drives the planetary gear assembly (8) to rotate.

2. An electric screwdriver according to claim 1, characterized in that: Both sides of the toothed disc sleeve (2) are provided with snap-fitting grooves (201), and the toothed disc sleeve (2) is snap-fitted with the motor sleeve (1) and the cutter head sleeve (3) respectively through the snap-fitting grooves (201) on both sides.

3. An electric screwdriver according to claim 2, characterized in that: The planetary gear assembly (8) comprises a plurality of rotating disks (801) clamped in the inner cavity of the gear disk sleeve (2), the inner side surface of the rotating disk (801) being fixedly connected to a plurality of plug-in rods (806), and the inner side surface of the rotating disk (801) is also provided with a plurality of movable gears (804), the movable gears (804) having plug-in slots (805) penetrating the center positions thereof, and the movable gears (804) being movably sleeved on the outer sides of the plug-in rods (806) through the plug-in slots (805).

4. The electric screwdriver according to claim 3, characterized in that: A groove (803) is provided at the center position of the inner side surface of the rotating disk (801), and a central gear (802) docked in the groove (803) is fixedly connected to the outer side surface of the rotating disk (801).

5. The electric screwdriver according to claim 4, characterized in that: The inner wall of the gear disc sleeve (2) is also evenly provided with latch teeth (202), and the latch teeth (202) are meshed with the plurality of sets of movable gears (804).

6. The electric screwdriver according to claim 5, characterized in that: The inner side surface of the cutter head connector (4) is provided with a rectangular groove (401), and the outer side of the outermost rotating disk (801) is fixedly connected with a rectangular head (807) that is clamped in the rectangular groove (401).

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