CN213828770U - Electric ratchet wrench - Google Patents

Abstract

The application relates to an electric ratchet wrench, relates to the field of wrench tools, and comprises a machine shell and a machine core, wherein the machine shell is fixedly connected with the machine core through a radial screw towards an axis. Fix casing and core through the screw for casing and core closely laminate, prevent that motor operation in-process torsion is too big to lead to the casing fracture.

Description

Electric ratchet wrench

Technical Field

The present application relates to the field of wrench tools, and more particularly, to an electric ratchet wrench.

Background

An electric ratchet wrench is a tool for automatically tightening and loosening screws by operating a motor, and is often used for tightening and loosening high-strength screws. An electric ratchet wrench is used to rotate screws or nuts placed in narrow or difficult to access locations, the wrench being rotatably connected to the end of the lever.

The utility model with the current publication number of CN204954707U discloses an electric ratchet wrench, which comprises a ratchet head, a transmission component, a motor end cover, a motor, a casing and a battery, wherein the ratchet head, the transmission component, the motor end cover, the motor and the battery are sequentially connected and accommodated in the casing, the transmission component comprises a planet carrier, a sun gear, a gear ring and a planetary gear, the planet carrier, the sun gear and the planetary gear are all positioned in the gear ring, three planetary gear shafts are uniformly arranged on one side end surface of the planet carrier around the circle center, the planetary gear is sleeved on the planetary gear shafts, the planetary gear is simultaneously meshed with a central gear arranged on the output shaft of the motor and an inner gear ring at one side of the gear ring, a motor end cover is arranged between the motor and the gear ring, the two ends of the motor end cover are symmetrically provided with positioning blocks, and the positioning blocks are embedded in corresponding flat grooves on the axial end faces of the gear rings.

With respect to the related art among the above, the inventors consider that the following drawbacks exist: the two parts of the machine shell are fixed through radial screws, and the radial screws clamp the machine core to achieve a fixing effect. However, when the torque generated by the operation of the motor is large, the structure is not stable enough, a gap is generated on the surface of the casing, and the gap disappears after the motor stops operating, so that the palm held on the casing may be pinched.

SUMMERY OF THE UTILITY MODEL

In order to make the connection between casing and the core more firm, can not ftracture when the motor operates, this application provides an electric ratchet spanner.

The application provides an electric ratchet spanner adopts following technical scheme:

an electric ratchet wrench comprises a shell and a machine core, wherein the shell is fixedly connected with the machine core through a plurality of screws along the radial direction.

The general connecting structure is that screws are transversely connected and fixed with two symmetrical shell parts to clamp the movement, but when the torsion of the movement is too large, the connecting structure between the two shell parts is unstable, a gap can be generated, and when the motor stops working, the gap disappears along with the reduction of the torsion, so that a palm held on the shell is clamped possibly, and a larger potential safety hazard exists. Through adopting above-mentioned technical scheme, the screw is direct to be fixed casing and core, has avoided the casing to produce the gap in the motor operation process.

Optionally, several of said screws are symmetrical about the diameter of the cross-sectional circle of the movement.

Through adopting above-mentioned technical scheme, the mode of arranging of screw is for being about diameter symmetry, and this kind of mode makes the global atress of core even, and then the mounted position of this kind of screw can reach more stable fixed effect.

Optionally, the head of the screw is in an inverted cone shape, and the shell is provided with a conical hole matched with the screw.

Through adopting above-mentioned technical scheme, the head of screw is the toper, and the hole that supplies the screw to pass on the casing simultaneously also is the toper. Compare for the grub screw with general screw, can reach better pressfitting effect, consequently conical being provided with does benefit to the connection effect of casing and core more stable.

Optionally, the movement comprises a core shell, a gear ring and a motor, and the screw penetrates through the core shell and is fixed with the gear ring.

Through adopting above-mentioned technical scheme, the screw not only can be fixed with the core shell of casing and core, and it also can go deep into in the inside ring gear of core moreover. This allows the ring gear to be secured to the motor in the core without requiring additional screws.

Optionally, a positioning hole is formed in the core shell, a first corresponding positioning groove is formed in the gear ring, and a matched positioning pin penetrates through the positioning hole and the positioning groove.

Through adopting above-mentioned technical scheme, the setting of locating hole and constant head tank for in case when inserting locating pin in locating hole and constant head tank, screw hole on the core shell and the screw hole on the ring gear can both the one-to-one, have made things convenient for the installation of screw fixed, save installation time.

Optionally, the casing is provided with a caulking groove for embedding the pin head of the positioning pin.

Through adopting above-mentioned technical scheme, pass through the locating pin location back when core shell and ring gear, the round pin head protrusion of locating pin is outside the core shell, and the casing can be through the mounted position of the quick alignment casing of the caulking groove that supplies the locating pin embedding that is equipped with on the casing for the inside mounted position of casing, core shell and core is synchronous to be confirmed, and the follow-up installation of being convenient for is fixed.

Optionally, the casing is composed of a first half casing and a second half casing which are symmetrical, and a limiting block and a limiting groove which are matched with each other are respectively arranged on the connecting surface of the first half casing and the second half casing.

Through adopting above-mentioned technical scheme, when installing the casing in the core outside, can assemble the quick fixing of follow-up screw of being convenient for through spacing groove and stopper with two parts symmetry casings.

Optionally, a second positioning column and a second positioning groove corresponding to each other are arranged on the connecting surface of the first half shell and the second half shell.

Through adopting above-mentioned technical scheme, when assembling the shell, because be equipped with a plurality of assorted spacing grooves and stopper on the face of connecting of first half casing and second half casing, can cause the dislocation to assemble. And this kind of possibility can be stopped in the setting of reference column and constant head tank two, directly matches the concatenation with reference column and constant head tank two, and the spacing groove on connecting the face also can aim at with the stopper naturally, need not spend time again to go to match spacing groove and stopper on connecting the face.

Optionally, the core casing is provided with a plurality of air inlets along the circumferential surface.

Through adopting above-mentioned technical scheme, in motor working process, can produce the heat, the setting up of air intake makes the heat effectively give off, avoids motor overheat to damage.

Optionally, the air inlet on the core shell is communicated with a gap between the motor and the gear ring.

By adopting the technical scheme, the air inlet is arranged at the gap between the motor and the gear ring, so that the air inside and outside the air inlet is communicated, and the heat generated by the motor in operation can be timely dissipated.

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

1. the shell and the machine core are fixed by the screws, so that the fixing effect is better, and the shell is not easy to crack in the working process to cause injury to a user;

2. the arrangement of the positioning pin ensures that the connection positions of the shell, the machine core shell and the gear ring in the machine core are fixed, thereby facilitating the installation process;

3. the clamping structure on the two symmetrical shell parts enables the assembly of the shell to be more time-saving and convenient;

4. the setting of air intake makes the effective heat dissipation of motor, the protection motor.

Drawings

Fig. 1 is an internal structural view of an electric ratchet wrench according to an embodiment of the present application;

FIG. 2 is a cross-sectional view taken along line C-C of FIG. 1;

FIG. 3 is a schematic view of the overall structure of the electric ratchet wrench;

FIG. 4 is a schematic view of a housing construction;

fig. 5 is a schematic view of the movement structure.

Description of reference numerals: 1. a housing; 11. a tapered hole; 12. caulking grooves; 13. a limiting groove; 14. a limiting block; 15. positioning a second groove; 16. a positioning column; 17. a first housing half; 18 a second half-shell; 2. a movement; 21. a core shell; 22. a ring gear; 23. a motor; 211. positioning holes; 221. positioning a first groove; 24. positioning pins; 241. a pin head; 212. an air inlet; 3. a screw; 4. a ratchet head.

Detailed Description

The present application is described in further detail below with reference to figures 1-5.

The embodiment of the application discloses an electric ratchet wrench. An electric ratchet wrench, referring to fig. 1 and 2, comprises a housing 1, a movement 2 and a ratchet head 4. The movement 2 includes a core case 21, and a ring gear 22 and a motor 23 inside the movement 2. The movement 2 is arranged in the machine shell 1, the gear ring 22 and the motor 23 are arranged in the movement 2 along the axial direction, and the gear ring 22 is positioned on one side of the motor 23 close to the ratchet head 4.

The machine shell 1 and the movement 2 are fixed by radial screws 3, and the screws 3 radially extend into the movement 2 from the outside of the machine shell 1. This application is provided with four screws 3 about cross-sectional circle diameter symmetry, and four screws 3 are the X type and arrange. The setting of radial screw 3 is direct to be connected casing 1 and core 2 and is fixed for the global atress of core 2 is even, and fixed effect is better, and the torsion that prevents motor 23 conveying when electric ratchet spanner operates is too big and makes two parts casing 1 fracture, avoids casing 1 fracture automatic closure again behind motor 23 stop work, causes the injury to user's palm.

The head shape of the screw 3 is the back taper, and the shape of the screw 3 hole arranged on the machine shell 1 is the back taper matched with the screw 3. The matching of the screw hole and the screw 3 is better than the matching of a common flat head screw, and the generated tight surface pressing effect is better, so that the fixing effect between the machine shell 1 and the machine core 2 is more stable.

Meanwhile, the bottom end of the screw 3 penetrates through the core shell 2 and extends into the gear ring 22 in the core 2, the shell 1, the core shell 21 and the gear ring 22 in the core 2 are fixed at the same time, and the fixation of the gear ring 22 is the key for the normal operation of the electric ratchet wrench. The conventional manner of fixing the ring gear 22 directly fixes the ring gear 22 and the motor 23 by axial screws, which requires additional screw connections. The end of the gear ring 22 inside the machine core 2 close to the ratchet head 4 is provided with a transmission gear and three planetary gears surrounding the transmission gear, the axes of the three planetary gears are provided with three rotating shafts, and simultaneously, the gear ring 22 and the planetary gears are sleeved with a gear ring meshed with the gear ring 22 and the planetary gears, so that the planetary gears continuously rotate along the gear ring while continuously rotating, and the operation of the ratchet head 4 is driven.

Referring to fig. 2 and 3, a first positioning groove 211 is formed on the circumferential surface of the core casing 2, and the first positioning groove 211 and the screw hole of the core casing 2 are located on the same radial surface. The positioning pin 24 penetrates through the first positioning groove 211 of the core shell 2 and extends into the gear ring 22, the pin head 241 of the positioning pin 24 is attached to the outside of the core shell 2, and the casing 1 is provided with a caulking groove 12 for the pin head 241 of the positioning pin 24 to be embedded. Therefore, during assembly, the positioning pin 24 is inserted into the positioning grooves I211 of the core shell 2 and the gear ring 22, the screw holes of the core shell 2 and the gear ring 22 are naturally aligned, then the head of the positioning pin 24 is embedded into the caulking groove 12 of the casing 1, the screw holes on the casing 1 can also be aligned with the screw holes of the movement 2, and the positioning pin 24 enables the mounting positions of the casing 1, the core shell 2 and the gear ring 22 to be fixed, so that the screw holes on the three parts are prevented from being installed in a staggered mode, rapid positioning is achieved, and the mounting time is saved.

Referring to fig. 4, the casing 1 outside the movement 2 is formed by assembling a first half casing 17 and a second half casing 18 which are symmetrical, wherein two connecting surfaces of the second half casing are provided with limiting grooves 13 which are matched with the edge profile along the axial direction, and the end part of the connecting surface of the part of the casing 1, which is far away from the ratchet head 4, is provided with a second positioning groove 15. Correspondingly, a limiting block 14 matched with the limiting groove 13 is arranged on the connecting surface of the first half case 18, and a positioning column 16 matched with a second positioning groove 15 is arranged at the end part of the connecting surface far away from the ratchet head 4. When the machine shell 1 is installed, the pin head 241 of the positioning pin 24 is embedded into the embedding groove 12 of one half of the machine shell 1, one part of the machine shell 1 is fixed firstly, the other half of the machine shell 1 is fixed in position through the clamping of the positioning column 16 and the positioning groove two 15, the two parts of the machine shell 1 are assembled through the limiting groove 13 and the limiting block 14 on the connecting surface, and finally the two parts of the machine shell 1 are fixed through the screw 3.

Referring to fig. 5, a circle of air inlets 212 are formed in the core casing 2 along the circumferential surface of the core casing 2, and four air inlets 212 are formed in the present application, wherein the positions of the air inlets 212 are located on one side of the screw 3 away from the ratchet head 4 and communicated with a gap between the gear ring 22 and the motor 23. The air inlet 212 can fully dissipate heat generated by the operation of the motor 23, and effectively prevent the motor 23 from being damaged.

The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.

Claims (10)

1. An electric ratchet wrench, characterized in that: the novel multifunctional motor comprises a shell (1) and a core (2), wherein the shell (1) is fixedly connected with the core (2) through a plurality of radial screws (3).

2. The electric ratchet wrench of claim 1, wherein: the plurality of screws (3) are symmetrical about the diameter of the cross-section circle of the movement (2).

3. The electric ratchet wrench of claim 1, wherein: the head of screw (3) all is the back taper, be equipped with on casing (1) with screw (3) assorted bell mouth (11).

4. The electric ratchet wrench of claim 1, wherein: the movement (2) comprises a core shell (21), a gear ring (22) and a motor (23), and the screw (3) penetrates through the core shell (21) and is fixed with the gear ring (22).

5. The electric ratchet wrench of claim 4, wherein: the core shell (21) is provided with a positioning hole (211), the gear ring (22) is provided with a corresponding positioning groove (221), and the positioning hole (211) and the positioning groove (221) are provided with a matched positioning pin (24) in a penetrating manner.

6. The electric ratchet wrench of claim 5, wherein: the machine shell (1) is provided with a caulking groove (12) for embedding a pin head (241) of the positioning pin (24).

7. The electric ratchet wrench of claim 1, wherein: the shell (1) is composed of a first half shell (17) and a second half shell (18) which are symmetrical, and a limiting block (14) and a limiting groove (13) which are matched with each other are respectively arranged on the connecting surface of the first half shell (17) and the second half shell (18).

8. The electric ratchet wrench of claim 1, wherein: and a positioning column (16) and a positioning groove II (15) which are matched with each other are arranged on the connecting surface of the first half shell (17) and the second half shell (18).

9. The electric ratchet wrench of claim 4, wherein: the core shell (21) is provided with a plurality of air inlets (212) along the peripheral surface.

10. The electric ratchet wrench of claim 9, wherein: an air inlet (212) on the core shell (21) is communicated with a gap between the motor (23) and the gear ring (22).

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