Holding shell assembly of impact wrench

Abstract

The utility model discloses a holding shell assembly of an impact wrench. The holding shell assembly comprises a left shell and a right shell. The left shell and the right shell are each sequentially provided with an upper installation cavity, a grab handle cavity and a lower installation cavity. In the upper mounting cavity, the first hole position is used for mounting the front-end shell assembly; the first protrusion is used for allowing the planetary gear reduction gearbox to abut backwards. The second bulge is used for fixing the brushless motor; and the second hole site is used for mounting the rear cover. In the grab handle cavity, the third bulge is used for fixing the adjusting module; the first through groove is used for forward extension of the debugging switch; the second through groove is used for the rotary switch to extend out; a power line of a light source of the front-end shell assembly penetrates into the threading groove. And in the lower mounting cavity, the upper cavity is used for fixing the brushless motor driver, the conductive part of the brushless motor driver enters the lower cavity through communication of the upper cavity and the lower cavity, and the lower cavity is used for mounting the storage battery. The utility model has the beneficial effects of simple structure, stable installation, convenient assembly and convenient mold opening.

Description

TECHNICAL FIELD

[0001] The utility model relates to impact wrench, especially impact wrench's holding casing subassembly. BACKGROUND

[0002] The impact wrench generally includes: holding casing subassembly, front end casing subassembly, planetary gear reduction box, brushless motor, adjustment module, brushless motor driver, battery and drill bit etc. The front end casing subassembly, planetary gear reduction box, brushless motor, adjustment module, brushless motor driver and battery are all installed in the holding casing subassembly. More specifically, the front part of the planetary gear reduction box is sleeved into the front end casing subassembly, the front end of the output shaft is a chuck for clamping and fixing the drill bit, the chuck passes out from the front end casing subassembly; the output shaft of the brushless motor is connected with the input shaft of the planetary gear reduction box; the adjustment module adjusts the rotating speed and direction of the brushless motor; the battery supplies power for the brushless motor and the light source on the front end casing subassembly. The existing holding casing subassembly is generally divided into left and right two housings for assembling the above-mentioned components installed in the holding casing subassembly, and after the two housings are connected together, these components are also relatively fixed. SUMMARY

[0003] The application provides an impact wrench holding casing subassembly, which can solve the problems of complex structure, inconvenient assembly and inconvenient mold opening of the existing two housings.

[0004] In the application, an impact wrench holding casing subassembly is provided, which includes: detachably connected left and right housings; the left and right housings both sequentially have: an upper mounting cavity, a handle cavity and a lower mounting cavity;

[0005] In the upper mounting cavity, the left and right housings both have: a first hole position on the front end face for mounting the front end casing subassembly, a first protrusion on the inner wall for the planetary gear reduction box to abut against from behind, and a group of second protrusions on the inner wall for fixing the brushless motor, and a second hole position on the rear end face for mounting the rear cover;

[0006] In the handle cavity, the left and right housings both have: a part corresponding to the brushless motor in the upper mounting cavity, a first through slot on the upper position of the inner wall for the speed adjustment switch of the adjustment module to extend forward, and a second through slot on the inner wall for the rotation switch of the adjustment module to extend left / right; the left housing also has: a group of third protrusions on the upper position of the inner wall for fixing the adjustment module, and a threading groove on the inner wall above the second through slot for communication with the outside;

[0007] In the lower mounting cavity, the left and right housings both have: the inner wall has an upper cavity body for fixing the brushless motor driver and communicating with the handle cavity, and a lower cavity body for mounting the battery and communicating with the upper cavity body.

[0008] In some embodiments, the first protrusion of the left shell and the right shell each has a concave notch concave to the back, which can be disassembled from the front-back or left-right direction and the planetary gear reduction box.

[0009] In some embodiments, the third protrusion is four L-shaped protrusions on the same rectangular track, and the two L-shaped protrusions on the back side form a wire bundling position between the inner wall of the left shell.

[0010] In some embodiments, the inner wall of the left shell has an extension part extending to the right shell at the wire bundling position.

[0011] In some embodiments, the left shell and the right shell each have a first heat dissipation hole in the upper mounting cavity corresponding to the brushless motor.

[0012] In some embodiments, the left shell and the right shell each have a second heat dissipation hole in the upper cavity.

[0013] In summary, the impact wrench handle shell assembly in the present application comprises a left shell and a right shell. The left shell and the right shell each sequentially comprise an upper mounting cavity, a handle cavity, and a lower mounting cavity. In the upper mounting cavity: a first hole position is used for mounting the front end shell assembly; a first protrusion is used for the planetary gear reduction box to abut backward; a second protrusion is used for fixing the brushless motor; and a second hole position is used for mounting the rear cover. In the handle cavity: a third protrusion is used for fixing the adjustment module; a first through slot is used for the debugging switch to protrude forward; a second through slot is used for the rotary switch to protrude; and a wire slot is used for the power line of the light source of the front end shell assembly to enter. In the lower mounting cavity: an upper cavity is used for fixing the brushless motor driver, and through the communication between the upper cavity and the lower cavity, the conductive part of the brushless motor driver enters the lower cavity, and the lower cavity is used for mounting the battery. The impact wrench handle shell assembly has the beneficial effects of simple structure, stable installation, convenient assembly, and convenient mold opening. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to better illustrate the technical solutions in the embodiments or background of the present application, the drawings required to be used in the embodiments or background of the present application will be described below.

[0015] Figure 1 It is a view of the present application biased to the back side;

[0016] Figure 2 It is a view of the present application biased to the front side;

[0017] Figure 3 It is an inner side view of the left shell;

[0018] Figure 4 It is a setting diagram of the left shell;

[0019] Figure 5 It is an inner side view of the right shell;

[0020] Figure 6 The setting diagram of the right shell.

[0021] In the figure,

[0022] 1, left shell; 1a, first connecting part; 1b, extension part;

[0023] 2, right shell; 2a, stepped hole; 2b, groove;

[0024] 3, upper mounting cavity; 3a, first hole site; 3b, first protrusion; 3b1, notch; 3c, second protrusion; 3c1, clamping block; 3e, second hole site; 3f, first heat dissipation hole;

[0025] 4, handle cavity; 4a, first through slot; 4b, second through slot; 4c, third protrusion; 4c1, wire bundling position; 4d, wire threading slot;

[0026] 5, lower mounting cavity; 5a, upper cavity; 5b, lower cavity; 5c, second heat dissipation hole. DETAILED DESCRIPTION

[0027] Further description will be made in combination with the drawings, which are only examples and not drawn in strict proportion. Unless otherwise defined, the technical terms or scientific terms used in the present disclosure should be understood as the general meaning understood by the person skilled in the art to which the present disclosure belongs. The "first", "second" and similar words used in the present disclosure do not represent any order, quantity or importance, but are only used to distinguish different components. "Include" or "contain" and similar words mean that the elements or objects before the words cover the elements or objects listed after the words and their equivalents, without excluding other elements or objects. "Connected" or "connected" and similar words are not limited to physical or mechanical connection, but can include electrical connection, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to represent relative positional relationship, when the absolute position of the described object changes, the relative positional relationship may also change accordingly. In the case of no conflict, the embodiments in the present application can be combined with each other.

[0028] Please refer to Figure 1 and Figure 2 A holding shell assembly of an impact wrench, comprising a left shell 1 and a right shell 2.

[0029] Please refer to Figure 4 and Figure 6 The left shell 1 and the right shell 2 are detachably connected. More specifically, the right side surface of the left shell 1 and the left side surface of the right shell 2 can have the same shape, and the two side surfaces are aligned and fitted when the two shells are connected.

[0030] The detachable connection between the left housing 1 and the right housing 2 can be achieved by using self-tapping screws. More specifically, the left housing 1 has a first connecting part 1a protruding from the left side of the left housing 1, and the first connecting part 1a has a hole for the self-tapping screw to tap into. The right housing 2 has a second connecting part flush with the right side of the right housing 2, and the second connecting part has a stepped hole 2a for the self-tapping screw to pass through. The protruding part of the first connecting part 1a is inserted into the stepped hole 2a to achieve the positioning of the left housing 1 and the right housing 2 when they are connected.

[0031] Please refer to Figure 3 and Figure 5 , the left housing 1 and the right housing 2 each have, in order: an upper mounting cavity 3, a handle cavity 4, and a lower mounting cavity 5. That is, for the left housing 1 or the right housing 2 alone, the upper mounting cavity 3, the handle cavity 4, and the lower mounting cavity 5 are each a part, and when the two are connected, the complete upper mounting cavity 3, handle cavity 4, and lower mounting cavity 5 are formed. The front-end housing assembly, planetary gear reducer, brushless motor, adjustment module, rear cover, brushless motor driver, battery, etc. of the impact wrench need to be installed to both the left housing 1 and the right housing 2 at the same time.

[0032] Please refer to Figure 1 , Figure 2 , Figure 4 and Figure 6 , the left housing 1 and the right housing 2 have the same design in the upper mounting cavity 3, which is: the front end of the upper mounting cavity 3 has a first hole 3a, the inner wall of the upper mounting cavity 3 has a first protrusion 3b and a set of second protrusions 3c, and the rear end of the upper mounting cavity 3 has a second hole 3e.

[0033] The first hole 3a is used for installing the front-end housing assembly. More specifically, the front-end housing assembly can be installed to the first hole 3a using self-tapping screws.

[0034] The first protrusion 3b is used for the planetary gear reducer to abut against from the rear. More specifically, the front part of the planetary gear reducer can be inserted into the front-end housing assembly, and after the front-end housing assembly is connected to the first hole 3a, the front-end housing assembly and the first protrusion 3b respectively block the planetary gear reducer from the front and rear, and then limit the rotation of the planetary gear reducer relative to the holding housing assembly, thus completing the fixation of the planetary gear reducer.

[0035] It can be designed between the planetary gear reducer and the front-end housing assembly to limit the rotation of the planetary gear reducer relative to the front-end housing assembly, thereby achieving the limitation of the rotation of the planetary gear reducer relative to the holding housing assembly. Of course, it can also be designed between the planetary gear reducer and the holding housing assembly.

[0036] In some embodiments, the first protrusion 3b of the left shell 1 and the right shell 2 each has a concave notch 3b1 that is concave backward, and the concave notch 3b1 can be disassembled from the front and back or left and right directions and the planetary gear reduction box. That is, the concave notch 3b1 of the left shell 1 is the first protrusion 3b that penetrates itself to the right, and the concave notch 3b1 of the right shell 2 is the first protrusion 3b that penetrates itself to the left; the outer wall of the planetary gear reduction box has a first plug that is inserted into the concave notch 3b1.

[0037] The second protrusion 3c is used for fixing the brushless motor. More specifically, a set of second protrusions 3c can be two, and the outer wall of the stator of the brushless motor can have a second plug that enters between the two second protrusions 3c, blocking the brushless motor from front and back; there is also a connecting block 3c1 between the two second protrusions 3c, and the second plug has a gap for the connecting block 3c1 to enter, limiting the rotation of the stator of the brushless motor relative to the holding shell assembly.

[0038] The second hole 3e is used for installing the back cover. More specifically, self-tapping screws can be used.

[0039] In the handle cavity 4, the left shell 1 and the right shell 2 have the same design, which is that the handle cavity 4 is connected to the part of the upper installation cavity 3 corresponding to the brushless motor, and the upper part of the inner wall of the handle cavity 4 has a first through slot 4a and a second through slot 4b.

[0040] The brushless motor uses a wire (marked as the first wire) to connect the brushless motor driver, and the first wire needs to pass through the handle cavity 4 from the upper installation cavity 3. Therefore, the handle cavity 4 is connected to the part of the upper installation cavity 3 corresponding to the brushless motor.

[0041] The brushless motor driver is provided with a conductive part for electrical connection of the battery, and also uses a wire (marked as the second wire) to connect the adjustment module. The adjustment module is used to control the rotation of the brushless motor, and has a speed adjustment switch for adjusting the size of the rotation speed and a rotation switch for adjusting the direction of rotation. The first through slot 4a is used for the speed adjustment switch to protrude forward. The second through slot 4b is used for the rotation switch to protrude, that is, one end of the rotation switch protrudes from the second through slot 4b of the left shell 1 to the left, and the other end protrudes from the second through slot 4b of the right shell 2 to the right.

[0042] In the handle cavity 4, the left shell 1 is also designed separately as follows: the upper part of the inner wall of the handle cavity 4 has a set of third protrusions 4c, and the position of the inner wall of the handle cavity 4 above the second through slot 4b has a wire slot 4d that is connected to the outside.

[0043] The third protrusion 4c is used for fixing the adjustment module.

[0044] The wire slot 4d is used for the power line of the light source of the front end shell assembly to enter, and the power line bypasses the third protrusion 4c to be connected to the conductive part on the brushless motor driver.

[0045] Please refer toFigure 3 and Figure 4 In some embodiments, the third protrusion 4c is four L-shaped protrusions on the same rectangular track. That is, the four L-shaped protrusions are respectively at the four corners of the rectangular track. The shape of the adjustment module is a square, which is just put into the four L-shaped protrusions and then attached to the inner wall of the left shell 1 and the right shell 2 at this position. The debugging switch first passes between the two L-shaped protrusions on the front side and then extends from the first through slot 4a. The two L-shaped protrusions on the back side and the inner wall of the left shell 1 form a wire binding position 4c1.

[0046] The first wire and the power line mentioned above both pass through the wire binding position 4c1. The width of the wire binding position 4c1 and the length of the first wire and the power line are reasonably designed so that the first wire and the power line can stably be in the left shell 1. When the right shell 2 and the left shell 1 are connected, the first wire and the power line will not be offset, avoiding the first wire or the power line entering between the right shell 2 and the left shell 1, which affects the attachment of the two.

[0047] Please refer to Figure 4 In some embodiments, the inner wall of the left shell 1 has an extension part 1b extending to the right shell 2 at the wire binding position 4c1. More specifically, the extension part 1b can be attached to the inner wall of the right shell 2 after the left shell 1 and the right shell 2 are connected, or the right shell 2 can have a groove 2b for the extension part 1b to enter.

[0048] The extension part 1b can better block the first wire and the power line at the wire binding position 4c1.

[0049] Please refer to Figure 4 and Figure 6 The left shell 1 and the right shell 2 have the same design at the lower installation cavity 5, which is that the inner wall has an upper cavity 5a communicating with the handle cavity 4 and a lower cavity 5b communicating with the upper cavity 5a.

[0050] The upper cavity 5a is used for fixing the brushless motor driver. Through the communication between the upper cavity 5a and the lower cavity 5b, the conductive part of the brushless motor driver enters the lower cavity 5b, and the lower cavity 5b is used for installing the battery.

[0051] Please refer to Figure 1 , Figure 2 and Figure 5 In some embodiments, the left shell 1 and the right shell 2 both have a first heat dissipation hole 3f in the part corresponding to the brushless motor in the upper installation cavity 3. More specifically, the rear end of the rotor of the brushless motor can be fixedly connected with an impeller, and the rear cover also has a hole communicating with the upper installation cavity 3.

[0052] When the brushless motor rotates, the impeller also rotates, so that air can pass through the part of the upper installation cavity 3 corresponding to the brushless motor to dissipate heat.

[0053] Referring to Figure 1 and Figure 2 In some embodiments, the upper cavities 5a of the left and right housings 1 and 2 are each provided with a second heat dissipation hole 5c for dissipating heat from the brushless motor driver.

Claims

1. A grip housing assembly for an impact wrench, comprising: The utility model relates to a detachable left shell (1) and right shell (2);The left shell (1) and the right shell (2) are in turn: upper mounting cavity (3), handle cavity (4) and lower mounting cavity (5); In upper mounting cavity (3), the left shell (1) and the right shell (2) are: the first hole position (3a) for the front end shell assembly installation has in the front end face, the first protrusion (3b) for the planetary gear reduction gearbox rearward resistance has in the inner wall and a group of second protrusions (3c) for brushless motor fixation, the second hole position (3e) for rear cover installation has in the rear end face; In handle cavity (4), the left shell (1) and the right shell (2) are: the part corresponding to the brushless motor in upper mounting cavity (3) is communicated, the first through slot (4a) for the speed adjustment switch of adjustment module forward protruding has in the upper position of the inner wall and the second through slot (4b) for the rotary switch of adjustment module left / right protruding;The left shell (1) is also separately: the third protrusion (4c) for adjustment module fixation has in the upper position of the inner wall, the threading groove (4d) for communicating with the outside is still in the position of the second through slot (4b) of the inner wall upper position; In lower mounting cavity (5), the left shell (1) and the right shell (2) are: the upper cavity (5a) for brushless motor driver fixation and communicating handle cavity (4) has in the inner wall, the lower cavity (5b) for battery installation and communicating upper cavity (5a) has in the inner wall. The first protrusion (3b) of the left shell (1) and the right shell (2) has the notch (3b1) that is concave to the rear, and the notch (3b1) can be disassembled from the front and rear or left and right directions with the planetary gear reduction gearbox.

2. A handle housing assembly for an impact wrench according to claim 1, wherein The third protrusion (4c) is: four L-shaped protrusions on the same rectangular track;The two L-shaped protrusions of rear side and the inner wall of the left shell (1) form the wire bundling position (4c1).

3. The impact wrench handle housing assembly of claim 1, wherein, The inner wall of the left shell (1) still has the extension part (1b) extending to the right shell (2) in the wire bundling position (4c1).

4. A handle housing assembly for an impact wrench as defined in claim 3, wherein The part corresponding to the brushless motor in upper mounting cavity (3) of the left shell (1) and the right shell (2) still has the first heat dissipation hole (3f).

5. The impact wrench handle housing assembly of claim 1, wherein, The upper cavity (5a) of the left shell (1) and the right shell (2) has the second heat dissipation hole (5c).

6. A handle housing assembly for an impact wrench as defined in claim 1, wherein ​

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