A screwdriver capable of preventing artificial disassembly

Abstract

The utility model provides an electric screwdriver capable of preventing artificial disassembly, which comprises an upper shell, a lower shell, a connecting piece, a motor, a transmission assembly and a screwdriver bit fixing assembly, the lower shell is detachably connected to the bottom of the upper shell through the connecting piece, the motor is installed in the upper shell, the transmission assembly and the screwdriver bit fixing assembly are installed in the lower shell, the two ends of the transmission assembly are respectively connected with the output end of the motor and the screwdriver bit fixing assembly, and the outer wall of the upper shell or the outer wall of the lower shell is provided with a first clamping part; the utility model further comprises a cover, the inner wall of the cover is provided with a second clamping part, the second clamping part is clamped and matched with the first clamping part, and the cover shields the connecting piece. Compared with the prior art, the electric screwdriver of the utility model can greatly avoid artificial disassembly by arranging the cover.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the electric wrench technical field, concretely relates to an electric wrench capable of preventing artificial disassembly. BACKGROUND

[0002] In order to make the structure of electric wrench compact, facilitate assembly simultaneously, the shell of electric wrench will be provided with segmented structure, such as the hand-held servo electric wrench provided in authorization announcement No. CN222553413U, the shell mainly includes motor body and electric wrench hand-held part. At present, the motor body and electric wrench hand-held part of the electric wrench are connected through screw, and the screw is exposed outside. However, in factory application, some workers will randomly disassemble screw, and disassemble the motor body and electric wrench hand-held part, which is easy to cause damage to motor and transmission assembly, resulting in equipment damage. SUMMARY

[0003] The utility model aims at overcoming the deficiency in prior art, and provides an electric wrench capable of preventing artificial disassembly.

[0004] In order to achieve the above object, the utility model discloses an electric wrench capable of preventing artificial disassembly, which comprises an upper shell, a lower shell, a connecting piece, a motor, a transmission assembly and a wrench head fixing assembly, the lower shell is detachably connected to the bottom of the upper shell through the connecting piece, the motor is installed in the upper shell, the transmission assembly and the wrench head fixing assembly are installed in the lower shell, and the two ends of the transmission assembly are connected with the output end of the motor and the wrench head fixing assembly respectively, characterized in that:

[0005] A first clamping part is arranged on the outer wall of the upper shell or the outer wall of the lower shell;

[0006] Further, the utility model also comprises a cover, the inner wall of the cover is provided with a second clamping part, the second clamping part is clamped and matched with the first clamping part, and the cover shields the connecting piece.

[0007] Further, the cover is a plastic structural part.

[0008] Further, the contour of the upper shell is larger than that of the lower shell;

[0009] The top of the lower shell is provided with a connecting lug part extending outward, and the connecting piece connects the connecting lug part to the upper shell from the lower side of the connecting lug part;

[0010] The first clamping part is arranged on the bottom surface of the connecting lug part, and the cover is connected to the bottom surface of the connecting lug part.

[0011] Further, the inner wall of the cover comprises an inner side wall and an inner top wall, the inner side wall is in contact with the outer side wall of the lower shell, and the inner top wall is in contact with the bottom surface of the connecting lug part.

[0012] Furthermore, the outer wall of the connecting ear is connected to the outer wall of the upper housing; and / or

[0013] The outer wall of the cover is connected to the outer wall of the connecting ear and the outer wall of the lower shell on both sides along the vertical direction.

[0014] Furthermore, the connecting ear is provided with multiple through holes, which are spaced apart circumferentially. The bottom surface of the upper housing is provided with multiple threaded holes, which correspond one-to-one with the multiple through holes. The connector is a screw.

[0015] Furthermore, the upper housing includes a motor housing, a light-transmitting element, and an end cap connected sequentially from bottom to top, and the motor is installed inside the motor housing;

[0016] An indicator light is provided on the top of the motor housing, and a light transmission channel is provided between the indicator light and the light-transmitting component.

[0017] Furthermore, the top and bottom surfaces of the light-transmitting component are each provided with a first positioning part, and the top surface of the motor housing and the bottom surface of the end cover are provided with a second positioning part that cooperates with the corresponding first positioning part.

[0018] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0019] By installing a cover at the connection point between the upper and lower housings, the cover blocks the connecting parts, preventing workers from directly accessing them and thus effectively preventing them from disassembling the upper and lower housings at will. This greatly alleviates the problem of damage to the internal transmission structure and even the damage to internal parts caused by human-caused disassembly.

[0020] The second snap-fit ​​part of the cover is located on its inner wall. When the cover snaps onto the first snap-fit ​​part, both the first and second snap-fit ​​parts are simultaneously covered by the cover. The two snap-fit ​​parts are concealed, ensuring the effect of preventing unauthorized disassembly. Attached Figure Description

[0021] Figure 1 This is a front view of an electric screwdriver designed to prevent unauthorized disassembly, as shown in the embodiment.

[0022] Figure 2 for Figure 1 A cross-sectional view of an electric screwdriver designed to prevent unauthorized disassembly.

[0023] Figure 3 for Figure 1 A three-dimensional structural diagram of the lower and middle shells;

[0024] Figure 4 for Figure 1A three-dimensional structural diagram of the upper and middle shells;

[0025] Figure 5 A schematic diagram of the three-dimensional structure of the cap;

[0026] Figure 6 for Figure 4 A three-dimensional exploded view of the upper shell;

[0027] Upper housing 100; motor housing 110; threaded hole 111; second positioning part 112; light-transmitting element 120; inner baffle 121; first positioning part 122; end cover 130; second annular connecting ear 131; third snap-fit ​​part 132; circuit board 140; indicator light 150; aviation plug 160;

[0028] Lower housing 200; first connecting ear 210; first snap-fit ​​part 211; through hole 212;

[0029] Motor 300;

[0030] Transmission assembly 400;

[0031] Bit retaining assembly 500;

[0032] 600; 610; 611; 620;

[0033] Start / stop switch 700;

[0034] 800-degree forward / reverse switch. Detailed Implementation

[0035] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0036] An electric screwdriver that prevents unauthorized disassembly; see [link / reference]. Figures 1-6 It includes an upper housing 100, a lower housing 200, a connector, a motor 300, a transmission assembly 400, a bit fixing assembly 500, and a cover 600.

[0037] The lower housing 200 is detachably connected to the bottom of the upper housing 100 via a connector. The motor 300 is installed inside the upper housing 100, and the transmission assembly 400 and the bit fixing assembly 500 are installed inside the lower housing 200. Both ends of the transmission assembly 400 are connected to the output end of the motor 300 and the bit fixing assembly 500, respectively. In operation, the motor 300 drives the bit fixing assembly 500 to rotate via the transmission assembly 400. The outer wall of either the upper housing 100 or the lower housing 200 is provided with a first engaging portion 211, and the inner wall of the cover 600 is provided with a second engaging portion 611. The second engaging portion 611 engages with the first engaging portion 211. Specifically, in this embodiment, the first engaging portion 211 is a slot, and the second engaging portion 611 is a block, which engages within the slot. After the cover 600 is assembled, it covers the connector.

[0038] By providing a cover 600 at the connection point between the upper housing 100 and the lower housing 200, the cover 600 conceals the connecting parts, preventing workers from directly accessing them and effectively preventing unauthorized disassembly. This greatly alleviates the problem of damage to internal transmission structures and even arbitrary damage to internal components (such as the motor 300, reducer, circuit board 140, etc.) caused by unauthorized disassembly. The second latching part 611 of the cover 600 is located on its inner wall. When the cover 600 latches onto the first latching part 211, both the first and second latching parts 211 are simultaneously concealed by the cover 600. The two latching parts are concealed, ensuring the effectiveness of preventing unauthorized disassembly.

[0039] In this embodiment, the cover 600 is a plastic structural component. When maintenance is required, the cover 600 can be destroyed with tools, and then replaced with a new cover 600 after the maintenance is completed. The cover 600 is made of plastic, which facilitates maintenance. Furthermore, although maintenance requires destroying the cover 600 and replacing it with a new one, the cost loss is smaller compared to the losses caused by workers carelessly damaging the cover 600.

[0040] In this embodiment, the motor 300 is a servo motor, which is larger in size than traditional brushless or brushed small motors. Therefore, the upper housing 100 is larger, and its outline is larger than that of the lower housing 200. The top of the lower housing 200 has an outwardly extending first connecting lug 210 with multiple through holes 212 spaced circumferentially. The bottom surface of the upper housing 100 has multiple threaded holes 111, each corresponding to one of the through holes 212. The connector is a screw, which passes through the through holes 212 from the underside of the first connecting lug 210 and is threaded into the threaded holes 111 of the upper housing 100, thereby fixing the lower housing 200 to the bottom of the upper housing 100. The aforementioned first snap-fit ​​portion 211 is located on the bottom surface of the first connecting lug 210, and the cover 600 is connected to the bottom surface of the first connecting lug 210, thereby concealing the connector. The above fully utilizes the dimensional difference between the upper housing 100 and the lower housing 200. Specifically, a cover 600 is provided at the position between the outer side wall of the lower housing 200 and the first connecting ear 210. The cover 600 forms a good transition at this position, so that the outer side of the electric screwdriver has a good appearance.

[0041] Furthermore, the outer wall of the first connecting ear 210 is flush with the outer wall of the upper housing 100, and the outer walls of the cover 600 are flush with the outer walls of the first connecting ear 210 and the outer walls of the lower housing 200 on both sides along the vertical direction, so that the first connecting ear 210 and the upper housing 100, and the cover 600 and the outer walls of the first connecting ear 210 and the lower housing 200 are smoothly transitioned, so that the outer side of the electric screwdriver has a good appearance.

[0042] In this embodiment, the inner wall of the cover 600 includes an inner side wall 620 and an inner top wall 610. The inner side wall 620 contacts the outer side wall of the lower housing 200, and the inner top wall 610 contacts the bottom surface of the first connecting ear 210. The aforementioned second snap-fit ​​portion 611 is provided on the inner top wall 610. The inner side wall 620 and the inner top wall 610 of the cover 600 respectively contact the outer side wall of the lower housing 200 and the bottom surface of the first connecting ear 210, making the assembly more stable and reliable.

[0043] In this embodiment, the through hole 212 is a countersunk hole. After the screw passes through the through hole 212 and connects with the threaded hole 111, the head of the screw can be hidden inside the through hole 212, avoiding interference with the cover 600 and ensuring that the cover 600 can cover the screw.

[0044] In this embodiment, the upper housing 100 includes a motor housing 110, a light-transmitting element 120, and an end cap 130 connected sequentially from bottom to top. The motor is installed inside the motor housing 110, and a circuit board 140 is also installed inside the motor housing 110. The circuit board 140 is located above the motor, and an indicator light 150 is connected to the circuit board 140. The light-transmitting element is annular, and there is a light transmission channel between the indicator light 150 and the entire light-transmitting element 120, so that the light can directly illuminate the light-transmitting element 120, allowing the operator to directly observe the various operating states of the electric screwdriver. The light-transmitting element 120 is annular, so the operator can observe the light from the indicator light 150 regardless of the angle from which they hold the electric screwdriver, resulting in a better indicator effect.

[0045] The top of the end cap 130 is equipped with an aviation plug 160, which allows it to interface with an external connector for powering an electric screwdriver, etc. The bottom of the end cap 130 has a second connecting lug, through which screws pass to secure the two components: the second connecting lug, the light-transmitting element, and the motor housing 110. A cover 600, as described above, can also be provided between the outer wall of the end cap 130 and the second connecting lug. In addition to its anti-tampering properties, the cover 600 also provides waterproofing, preventing water from seeping into the interior through the connection holes and affecting the circuit board 140, electronic components, and motor.

[0046] The second annular connecting ear 131 of the end cap 130 is provided with a third snap-fit ​​part 132, which is also a snap-fit ​​groove. In order to facilitate the processing of the snap-fit ​​groove, the snap-fit ​​groove passes through the upper and lower surfaces of the second connecting ear and the bottom is connected to the inner sidewall 620 of the second annular connecting ear 131.

[0047] In this embodiment, the inner ring of the light-transmitting element 120 is provided with an inner baffle 121, which extends towards the end cover 130. By providing the inner baffle 121, the light guiding effect and the indicator light 150 indication effect can be improved. On the other hand, since the third latching part 132 penetrates through the upper and lower surfaces of the second connecting ear, if water seeps into the housing from the third latching part 132, it can easily damage the circuit board 140 and corresponding electronic components. The inner baffle 121 blocks the seeping water, further improving the protection effect.

[0048] In this embodiment, the top and bottom surfaces of the light-transmitting element 120 are each provided with a first positioning part 122, and the top surface of the motor housing 110 and the bottom surface of the end cover 130 are provided with a second positioning part 112 that cooperates with the corresponding first positioning part 122. Specifically, the first positioning part 122 and the second positioning part 112 are a positioning post and a positioning groove, respectively.

[0049] In this embodiment, the outer wall of the upper housing 100 is provided with a start / stop switch 700 and a forward / reverse switch 800. The motor can be connected to the transmission assembly 400 through a reducer (not shown in the figure). The above, as well as the transmission assembly 400 and the bit fixing assembly 500, adopt existing structures, such as the contents disclosed in the prior art such as the authorization announcement numbers CN218364424U and CN204160391U. This embodiment will not repeat them.

[0050] Obviously, the above embodiments of this utility model are merely examples for clearly illustrating this utility model, and are not intended to limit the implementation of this utility model. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of this utility model should be included within the protection scope of the claims of this utility model.

Claims

1. An electric screwdriver capable of preventing unauthorized disassembly, comprising an upper housing, a lower housing, a connector, a motor, a transmission assembly, and a bit fixing assembly, wherein the lower housing is detachably connected to the bottom of the upper housing via the connector, the motor is installed inside the upper housing, and the transmission assembly and bit fixing assembly are installed inside the lower housing, wherein both ends of the transmission assembly are respectively connected to the output end of the motor and the bit fixing assembly, characterized in that: The outer wall of the upper housing or the outer wall of the lower housing is provided with a first snap-fit ​​portion; It also includes a cover, the inner wall of which is provided with a second snap-fit ​​portion, the second snap-fit ​​portion engaging with the first snap-fit ​​portion, the cover covering the connector.

2. The electric screwdriver according to claim 1, characterized in that: The cover is a plastic structural component.

3. The electric screwdriver according to claim 1, characterized in that: The outline of the upper housing is larger than the outline of the lower housing; The top of the lower housing is provided with an outwardly extending connecting lug, and the connector connects the connecting lug to the upper housing from the lower side of the connecting lug; The first snap-fit ​​portion is located on the bottom surface of the connecting ear portion, and the cover is connected to the bottom surface of the connecting ear portion.

4. The electric screwdriver according to claim 3, characterized in that: The inner wall of the cover includes an inner side wall and an inner top wall. The inner side wall contacts the outer side wall of the lower housing, and the inner top wall contacts the bottom surface of the connecting ear.

5. The electric screwdriver according to claim 3, characterized in that: The outer wall of the connecting ear is connected to the outer wall of the upper housing; and / or The outer wall of the cover is connected to the outer wall of the connecting ear and the outer wall of the lower shell on both sides along the vertical direction.

6. The electric screwdriver according to claim 3, characterized in that: The connecting ear is provided with multiple through holes, which are spaced apart circumferentially. The bottom surface of the upper housing is provided with multiple threaded holes, which correspond one-to-one with the multiple through holes. The connector is a screw.

7. The electric screwdriver according to claim 1, characterized in that: The upper housing includes a motor housing, a light-transmitting element, and an end cap connected sequentially from bottom to top, and the motor is installed inside the motor housing; An indicator light is provided on the top of the motor housing, and a light transmission channel is provided between the indicator light and the light-transmitting component.

8. The electric screwdriver according to claim 7, characterized in that: The top and bottom surfaces of the light-transmitting component are each provided with a first positioning part, and the top surface of the motor housing and the bottom surface of the end cover are provided with a second positioning part that cooperates with the corresponding first positioning part.

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