Limiting structure of electric wrench

Abstract

The utility model discloses a limiting structure of an electric wrench, which relates to the technical field of limiting structures of electric wrenches, and comprises a plastic shell I, a metal shell II in threaded connection with the end part of the plastic shell I, an aluminum piece arranged in the plastic shell I, and grooves with the same size formed on the end surface of the metal shell II and the end surface of the aluminum piece, the end face of the first plastic shell and the end face of the aluminum piece are further provided with annular grooves, annular rubber sheets are arranged on the groove walls of the annular grooves, the lower end of the first plastic shell fixedly communicates with a handle, the lower end of the handle fixedly communicates with a base, and the lower surface of the base is further fixedly connected with a battery interface. The electric wrench further comprises a buffering assembly, a transmission assembly, a safety assembly and a connecting assembly to form a complete electric wrench device, and the problems that a common electric wrench is limited and matched through an aluminum piece and a plastic piece, after long-term use, the fit clearance between the aluminum piece and the plastic piece can be enlarged, and the service life is affected are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of the limiting structure of an electric wrench, and particularly relates to a limiting structure of an electric wrench. Background Technique

[0002] An electric wrench refers to an electric tool for tightening and loosening bolts and nuts, and is a tool for tightening high-strength bolts. It is widely used in industries such as automobiles, electric motors and electrical appliances, power machinery, valves, water pumps, and textile machinery. It is used for the initial tightening, final tightening of large hexagon high-strength bolts in the construction of steel structure bridges, factory buildings, chemical engineering, and power generation equipment installation, and the initial tightening of twist-off type high-strength bolts, as well as occasions where strict requirements are imposed on the torque or axial force of bolt fasteners.

[0003] However, the existing electric wrenches have the following problems during use: Ordinary electric wrenches rely on the limiting cooperation of aluminum parts and plastic parts. After long-term use, the cooperation gap between the aluminum parts and the plastic parts will become larger, affecting the service life. Summary of the Invention

[0004] The purpose of the utility model is to provide a limiting structure of an electric wrench, which solves the technical problems put forward in the background technique.

[0005] To achieve the above purpose, the utility model provides the following technical solution: A limiting structure of an electric wrench includes a first plastic housing. The end of the first plastic housing is threadedly connected with a second metal housing. An aluminum part is arranged inside the first plastic housing. Grooves of equal size are opened on the end faces of the second metal housing and the aluminum part. A limiting pin is arranged inside the groove, and annular grooves are also opened on the end faces of the first plastic housing and the aluminum part. An annular rubber sheet is arranged on the groove wall of the annular groove.

[0006] Optionally, the electric wrench further includes the following components:

[0007] A buffer component, a transmission component, a safety component, and a connection component. The buffer component is arranged inside the first plastic housing. The transmission component is also arranged inside the first plastic housing. The lower end of the first plastic housing is fixedly communicated with a handle. The lower end of the handle is fixedly communicated with a base. The safety component is arranged inside the handle. The connection component is arranged inside the base.

[0008] Optionally, the buffer component includes:

[0009] A connecting head, the outer surface of which is slidably connected to the inner wall of the second metal shell, a notch is provided on the end face of the connecting head inside the second metal shell, a pressure column is slidably connected to the groove wall of the notch, a pressure frame is slidably connected to the surface of the pressure column, the end face of the pressure frame is in contact with the end face of the connecting head, a sliding groove is also provided on the surface of the pressure column, a rolling ball is slidably connected to the groove wall of the sliding groove, a sliding groove second which is the same as the sliding groove is also provided on the inner wall of the pressure frame, and the groove wall of the second sliding groove is also rollingly connected to the surface of the rolling ball.

[0010] Optionally, the buffer component further includes:

[0011] Rolling ball No. 2, an annular groove No. 2 is opened at the end of the pressure frame, the bottom of the annular groove No. 2 is rollingly connected to the surface of the rolling ball No. 2, the groove wall of the annular groove No. 2 is also slidably connected with an annular plate, the end face of the annular plate is in contact with the surface of the rolling ball No. 2, the end face of the annular plate facing away from the rolling ball No. 2 is fixedly connected with a spring, the other end of the spring is fixedly connected with a kit, and the end of the kit facing away from the spring is fixedly connected to the surface of the aluminum part.

[0012] Optionally, the transmission assembly includes:

[0013] The main shaft, a motor is arranged at the bottom of the plastic shell 1, the output end of the motor is fixedly connected to the end of the main shaft, the end of the main shaft away from the motor is arranged with teeth, the teeth at the end of the main shaft are meshingly connected with a gear ring 1, the tooth surface of the gear ring 1 is meshingly connected with an inner gear ring, the inner wall of the gear ring 1 is rotatably connected with a rotating column, the end of the rotating column is fixedly connected with a kit, the end face of the kit is fixedly connected with a kit 2, the surface of the kit 2 is fixedly connected to the surface of the aluminum part, and the end of the inner gear ring is fixedly connected to the end of the pressure column.

[0014] Optionally, the insurance component includes:

[0015] A safety switch, wherein a through groove is provided on the lower end surface of the plastic shell, the groove wall of the through groove is slidably connected to the surface of the safety switch, the lower end of the safety switch is fixedly connected to a limit rod, the surface of the limit rod abuts against a limit block, the lower surface of the limit block is fixedly connected to a switch, and the surface of the handle is provided with an opening that penetrates to the interior, and the groove wall of the opening is slidably connected to the surface of the switch.

[0016] Optionally, the insurance component further includes:

[0017] A controller, the upper end inside of the handle is fixedly connected to the outer shell of the controller, one side of the switch facing the inside of the handle is fixedly connected to the trigger end of the controller, and a wire is fixedly connected inside the controller. The upper end of the wire is fixedly connected to the wiring terminal of the motor, and the lower end of the motor is fixedly connected to the upper wiring terminal of the base.

[0018] Optionally, the connection component includes:

[0019] A limit frame, the upper surface of the limit frame is fixedly connected to the lower surface of the base. A battery interface is also fixedly connected to the lower surface of the base, and the battery interface is inside the limit frame.

[0020] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0021] By opening equal-sized grooves between the aluminum part and the metal shell II and arranging limit pins in the grooves, the amplitude of relative movement between the aluminum part and the metal shell II is reduced. A buffer annular rubber sheet is also arranged between the aluminum part and the metal shell II, further ensuring that during long-term use of the electric wrench, the gap between the aluminum part and the metal shell II will not increase and affect the service life of the electric wrench.

[0022] By squeezing the spring, the torque generated after tightening the nut is offset, thereby reducing the possibility of damaging the nut. The rolling beads II arranged between the spring and the pressing frame also reduce the friction generated when there is relative movement between them, thereby reducing the wear of the electric wrench during use and further improving the service life of the electric wrench.

[0023] Through the design of planetary gears, power splitting is carried out during power transmission, and the input shaft and the output shaft are on the same horizontal line, so that adjacent sun gears and ring gears are always in constant meshing state, further improving the stability of the electric wrench during use.

[0024] By setting an insurance switch, the possibility of misoperation of the electric wrench is reduced, and the safety of the electric wrench is further improved.

[0025] Through the setting of the limit frame, the base of the electric wrench can be made stable, so that the electric wrench can be placed vertically, effectively reducing the phenomenon that the output end of the electric wrench directly touches the ground. And since the limit frame is arranged outside the battery interface, the possibility of the battery interface being damaged by contact with the outside is reduced. Description of the Drawings

[0026] Figure 1This is the front view of the structure of the present utility model;

[0027] Figure 2 This is the cross-sectional view of the internal structure of the first plastic housing in the present utility model;

[0028] Figure 3 This is the bottom view of the structure of the present utility model;

[0029] Figure 4 This is the front view of the hidden structure of the second metal housing in the present utility model;

[0030] Figure 5 This is the enlarged view of the structure of the insurance component in the present utility model;

[0031] Figure 6 This is the front view of the hidden structure of the first plastic housing and the second metal housing in the present utility model;

[0032] Figure 7 This is the front view of the structure of the transmission component in the present utility model.

[0033] In the figure: 1, base; 2, handle; 3, first plastic housing; 4, second metal housing; 5, connector; 6, annular rubber sheet; 7, second rolling bead; 8, annular plate; 9, pressing column; 10, rolling bead; 11, spring; 12, kit; 13, main shaft; 14, motor; 15, switch; 16, limit frame; 17, battery interface; 18, limit rod; 19, controller; 20, electric wire; 21, insurance switch; 22, limit block; 23, second kit; 24, pressing frame; 25, chute; 26, rotating column; 27, first toothed ring; 28, internal toothed ring; 29, groove; 30, aluminum part; 31, limit pin. Specific embodiments

[0034] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0035] Embodiment 1. Please refer to Figures 1 to 7 , the present utility model provides a limit structure for an electric wrench, which includes a first plastic housing 3. The end of the first plastic housing 3 is threadedly connected to a second metal housing 4. An aluminum part 30 is arranged inside the first plastic housing 3. Grooves 29 of equal size are provided on the end faces of both the second metal housing 4 and the aluminum part 30. A limit pin 31 is arranged inside the groove 29. Moreover, annular grooves are provided on the end faces of both the first plastic housing 3 and the aluminum part 30, and an annular rubber sheet 6 is arranged on the groove wall of the annular groove;

[0036] In this embodiment, by opening a groove 29 of equal size between the aluminum part 30 and the metal shell 24 and setting a limit pin 31 in the groove 29, the amplitude of relative movement between the aluminum part 30 and the metal shell 24 is reduced, and a buffer annular rubber sheet 6 is provided between the aluminum part 30 and the metal shell 24, so that the gap between the aluminum part 30 and the metal shell 24 will not increase during long-term use of the electric wrench, thereby preventing the service life of the electric wrench from being affected.

[0037] Embodiment 2: Based on the above embodiment, in this embodiment, the buffer assembly includes:

[0038] A connector 5, the outer surface of the connector 5 is slidably connected to the inner wall of the metal shell 24, a notch is provided on the end surface of the connector 5 inside the metal shell 24, a pressing column 9 is slidably connected to the groove wall of the notch, a pressing frame 24 is slidably connected to the surface of the pressing column 9, the end surface of the pressing frame 24 abuts against the end surface of the connector 5, a sliding groove 25 is also provided on the surface of the pressing column 9, a rolling ball 10 is slidably connected to the groove wall of the sliding groove 25, a sliding groove 2 which is the same as the sliding groove 25 is also provided on the inner wall of the pressing frame 24, and the groove wall of the sliding groove 2 is also rollingly connected to the surface of the rolling ball 10;

[0039] Rolling ball No. 2 7 and the end of the pressure frame 24 are provided with an annular groove No. 2, the bottom of the annular groove No. 2 is rollingly connected to the surface of the rolling ball No. 2 7, the groove wall of the annular groove No. 2 is also slidably connected with an annular plate 8, the end face of the annular plate 8 is in contact with the surface of the rolling ball No. 2 7, the end face of the annular plate 8 facing away from the rolling ball No. 2 7 is fixedly connected with a spring 11, the other end of the spring 11 is fixedly connected with a kit 12, and the end of the kit 12 facing away from the spring 11 is fixedly connected to the surface of the aluminum component 30.

[0040] In this embodiment, when the electric wrench is working, after the nut is tightened, the electric wrench will continue to rotate due to the action of inertia, thereby driving the rolling ball 10 to slide in the slide groove 25, further squeezing the spring 11 to offset the torque generated after tightening the nut, thereby reducing the possibility of damaging the nut, and the rolling ball 7 arranged between the spring 11 and the pressure frame 24 will also reduce the friction generated when there is relative movement between the spring 11 and the pressure frame 24, thereby reducing the loss of the electric wrench during use, and further improving the service life of the electric wrench.

[0041] Embodiment 3, based on the above embodiment, the transmission assembly includes:

[0042] The main shaft 13 and the bottom of the plastic shell 3 are provided with a motor 14, the output end of the motor 14 is fixedly connected to the end of the main shaft 13, and the end of the main shaft 13 away from the motor 14 is provided with a tooth pattern, the tooth pattern at the end of the main shaft 13 is meshingly connected with a gear ring 27, the tooth surface of the gear ring 27 is meshingly connected with an inner gear ring 28, the inner wall of the gear ring 27 is rotatably connected with a rotating column 26, the end of the rotating column 26 is fixedly connected with a set 12, the end face of the set 12 is fixedly connected with a set 23, the surface of the set 23 is fixedly connected to the surface of the aluminum part 30, and the end of the inner gear ring 28 is fixedly connected to the end of the pressure column 9.

[0043] In this embodiment, the electric wrench rotates by the motor 14 to drive the main shaft 13 to rotate, drive the gear ring 1 27 to rotate, and then further drive the inner gear ring 28 to rotate, so that the electric wrench operates;

[0044] The arrangement of the transmission assembly, through the design of the planetary gear, performs power diversion when transmitting power, and the input shaft and the output shaft are on the same horizontal line, so that the adjacent sun gear and ring gear are always in a constant meshing state, further improving the stability of the electric wrench during use.

[0045] Embodiment 4: Based on the above embodiment, in this embodiment, the insurance component includes:

[0046] Safety switch 21, the lower end surface of the plastic housing 3 is provided with a through groove, the groove wall of the through groove is slidably connected to the surface of the safety switch 21, the lower end of the safety switch 21 is fixedly connected to the limit rod 18, the surface of the limit rod 18 abuts against the limit block 22, the lower surface of the limit block 22 is fixedly connected to the switch 15, and the surface of the handle 2 is provided with an opening that penetrates to the inside, and the groove wall of the opening is slidably connected to the surface of the switch 15;

[0047] The controller 19, the interior of the upper end of the handle 2 is fixedly connected to the outer shell of the controller 19, the side of the switch 15 facing the interior of the handle 2 is fixedly connected to the trigger end of the controller 19, and the interior of the controller 19 is fixedly connected with a wire 20, the upper end of the wire 20 is fixedly connected to the wiring terminal of the motor 14, and the lower end of the motor 14 is fixedly connected to the upper wiring terminal of the base 1.

[0048] In this embodiment, when the safety switch 21 is not pressed, the limit rod 18 will abut against the limit block 22, so that the switch 15 cannot move toward the inside of the handle 2, and the trigger end of the controller 19 is pressed to control the operation of the electric wrench, thereby reducing the possibility of misoperation of the electric wrench and further improving the safety of the electric wrench.

[0049] Embodiment 5, based on the above embodiment, the connection component includes:

[0050] The limiting frame 16, the upper surface of the limiting frame 16 is fixedly connected to the lower surface of the base 1, and a battery interface 17 is also fixedly connected to the lower surface of the base 1, and the battery interface 17 is located inside the limiting frame 16

[0051] In this embodiment, through the setting of the limiting frame 16, the base of the electric wrench can be made stable, so that the electric wrench can be placed vertically, thereby effectively reducing the phenomenon that the output end of the electric wrench directly touches the ground. And since the limiting frame 16 is arranged outside the battery interface 17, the possibility of damage to the battery interface 17 due to contact with the outside world is reduced.

[0052] Although the embodiments of the present invention have been shown and described, those of ordinary skill in the art can understand that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A limit structure for an electric wrench, comprising a first plastic housing (3), characterized in that: The end of the first plastic housing (3) is threadedly connected to the second metal housing (4). An aluminum part (30) is arranged inside the first plastic housing (3). Grooves (29) of the same size are provided on the end faces of the second metal housing (4) and the aluminum part (30). A limit pin (31) is arranged inside the groove (29). Annular grooves are also provided on the end faces of the first plastic housing (3) and the aluminum part (30), and an annular rubber sheet (6) is arranged on the groove wall of the annular groove.

2. The limit structure of an electric wrench according to claim 1, characterized in that: The electric wrench further includes: a buffer assembly, a transmission assembly, a safety assembly, and a connection assembly. The buffer assembly is arranged inside the first plastic housing (3), and the transmission assembly is also arranged inside the first plastic housing (3). The lower end of the first plastic housing (3) is fixedly communicated with a handle (2), and the lower end of the handle (2) is fixedly communicated with a base (1). The safety assembly is arranged inside the handle (2), and the connection assembly is arranged inside the base (1).

3. The limit structure of an electric wrench according to claim 2, characterized in that: The buffer assembly includes: a connection head (5). The outer surface of the connection head (5) is slidably connected to the inner wall of the second metal housing (4). A notch is provided on the end face of the connection head (5) inside the second metal housing (4). A pressing column (9) is slidably connected to the notch wall. A pressing frame (24) is slidably connected to the surface of the pressing column (9). The end face of the pressing frame (24) abuts against the end face of the connection head (5). A sliding groove (25) is also provided on the surface of the pressing column (9). A rolling bead (10) is slidably connected to the groove wall of the sliding groove (25). A sliding groove two identical to the sliding groove (25) is also provided on the inner wall of the pressing frame (24), and the groove wall of the sliding groove two is also in rolling connection with the surface of the rolling bead (10).

4. The limit structure of an electric wrench according to claim 3, characterized in that: The buffer assembly further includes: a rolling bead two (7). An annular notch two is provided at the end of the pressing frame (24). The bottom of the annular notch two is in rolling connection with the surface of the rolling bead two (7). An annular plate (8) is slidably connected to the notch wall of the annular notch two. The end face of the annular plate (8) abuts against the surface of the rolling bead two (7). A spring (11) is fixedly connected to the end face of the annular plate (8) away from the rolling bead two (7). The other end of the spring (11) is fixedly connected to a kit (12). The end of the kit (12) away from the spring (11) is fixedly connected to the surface of the aluminum part (30).

5. The limit structure of an electric wrench according to claim 4, characterized in that: The transmission assembly includes: Spindle (13), a motor (14) is provided at the bottom of the first plastic housing (3), the output end of the motor (14) is fixedly connected to the end of the spindle (13), the end of the spindle (13) away from the motor (14) is provided with tooth threads, the tooth threads at the end of the spindle (13) are meshed with a first toothed ring (27), the tooth surface of the first toothed ring (27) is meshed with an internal toothed ring (28), a rotating column (26) is rotatably connected to the inner wall of the first toothed ring (27), a kit (12) is fixedly connected to the end of the rotating column (26), a second kit (23) is fixedly connected to the end face of the kit (12), the surface of the second kit (23) is fixedly connected to the surface of the aluminum part (30), and the end of the internal toothed ring (28) is fixedly connected to the end of the pressing column (9).

6. The limit structure of an electric wrench according to claim 5, wherein: The insurance component includes: An insurance switch (21), a through groove is provided on the lower surface of the first plastic housing (3), the groove wall of the through groove is slidably connected to the surface of the insurance switch (21), a limiting rod (18) is fixedly connected to the lower end of the insurance switch (21), a limiting block (22) is abutted against the surface of the limiting rod (18), a switch (15) is fixedly connected to the lower surface of the limiting block (22), and an opening penetrating to the inside is provided on the surface of the handle (2), and the groove wall of the opening is slidably connected to the surface of the switch (15).

7. The limit structure of an electric wrench according to claim 6, characterized in that: The insurance component further includes: A controller (19), the upper end inside the handle (2) is fixedly connected to the housing of the controller (19), one side of the switch (15) facing the inside of the handle (2) is fixedly connected to the triggering end of the controller (19), and a wire (20) is fixedly communicated inside the controller (19), the upper end of the wire (20) is fixedly connected to the wiring end of the motor (14), and the lower end of the motor (14) is fixedly connected to the upper wiring end of the base (1).

8. The limit structure of an electric wrench according to claim 2, characterized in that: The connection component includes: A limiting frame (16), the upper surface of the limiting frame (16) is fixedly connected to the lower surface of the base (1), a battery interface (17) is also fixedly connected to the lower surface of the base (1), and the battery interface (17) is located inside the limiting frame (16).

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