Electric wrench with control system

Abstract

According to the electric wrench with the control system, the electric wrench is applied to the field of electric wrenches, when the electric wrench is used, convenient dismounting and splicing treatment can be achieved through an inserting piece and a buckling barrel, and the interior of a wrench shell and the interior of a battery box are kept in an air flow through state through use of a ventilation frame; in addition, when internal heat dissipation control processing is carried out, a temperature sensor needs to be matched, so that when the heat dissipation capacity of the fan blades cannot meet the heat dissipation requirement, the fan blades can be driven to rotate under the cooperation of a driving motor and a traction cable, and the heat dissipation effect of the fan blades is improved. The lower box body of the battery box is driven to rotate with the shaft rod as the circle center, then the contact heat exchange area of the battery body in the battery box and air is increased, the heat dissipation effect is enhanced, in addition, the electromagnetic vertical block and the adjusting driving unit are matched, the battery body at the lower layer position can be turned over, and heat dissipation is more uniform.

Description

Technical Field

[0001] The invention relates to an electric wrench, in particular to an electric wrench with a control system which is applied in the field of electric wrenches. Background Art

[0002] Electric wrenches, also known as high-strength bolt guns, are widely used in various scenarios of bolt tightening operations, such as scaffolding installation and disassembly, automobile tire loading and unloading, etc. Electric wrenches have the characteristics of strong torque, time saving and labor saving. When using them, motor performance is a very important core indicator. When using electric wrenches, attention should be paid to the heat dissipation of the motor to ensure the stable performance of the motor.

[0003] The specification of Chinese invention patent CN202010189656.8 discloses an electric wrench with a fixing function. The electric wrench can be fixed by a fixing mechanism, which reduces the chance of twisting of the main body of the electric wrench and improves the safety of the use of the electric wrench. The heat dissipation efficiency of the electric wrench is accelerated by the heat dissipation mechanism, thereby improving the reliability of the operation of the electric wrench.

[0004] When the existing electric wrench is in use, the rotation of the fan blades is used to achieve heat dissipation in the shell. However, the battery of the electric wrench is usually connected to the bottom end of the shell and is in a relatively closed state with the airflow in the shell. When the electric wrench is working, the airflow provided by the rotation of the fan blades can accelerate the heat dissipation of the motor. However, as the battery that supplies energy to the motor, its heat dissipation needs also need to be guaranteed to ensure the stable performance of the motor. Summary of the invention

[0005] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is to take into account the synchronous heat dissipation of the motor and the battery when the electric wrench is working, so as to ensure the stability of the motor performance and further ensure the stable use of the electric wrench.

[0006] In order to solve the above problems, the present invention provides an electric wrench with a control system, comprising a wrench housing with a hollow interior, a brushless motor installed inside the wrench housing, a fan blade connected to the output shaft of the brushless motor, a buckle cylinder provided at the bottom of the wrench housing, a depression provided on the inner wall of the buckle cylinder, a battery box arranged below the wrench housing, and the battery box is composed of two box bodies assembled by a shaft rod, a vent frame provided at the top of the battery box, and a waterproof vent plate is embedded and installed inside the vent frame, a plug-in component with a diameter the same as the inner diameter of the buckle cylinder is installed on the top of the waterproof vent plate, a receiving groove is provided inside the plug-in component, a compression spring is connected inside the receiving groove, and both ends of the compression spring are connected to electromagnetic plug blocks matching the depression;

[0007] A bracket located on one side of the connector is installed on the top of the waterproof and breathable plate, a driving motor is installed on the top of the bracket, the output end of the driving motor is connected to a driving gear, a rotating rod located in front of the driving motor is installed on the top of the bracket, a driven gear that meshes with the driving gear is fixedly sleeved on the surface of the rotating rod, a pulling rope is wrapped around the surface of the rotating rod, and the tail end of the pulling rope is connected to the surface of the lower part of the battery box.

[0008] In the above-mentioned electric wrench with a control system, the splicing design of the air permeable frame, the drive motor, the pulling cable and the battery box is utilized, so that the synchronous heat dissipation of the motor and the battery can be taken into account when the wrench is in use, thereby ensuring the stability of the motor performance and the stable use of the electric wrench.

[0009] As a further improvement of the present application, it also includes an auxiliary control system, which includes a processor installed in the wrench housing, and the processor is connected to a monitoring module, an execution module and a control module. The monitoring module includes a temperature sensor installed in the wrench housing, which is used to monitor the temperature changes in the wrench housing. The execution module is connected to the brushless motor and the drive motor signals, and is used to control the on and off states of the brushless motor and the drive motor. The control module is connected to the electromagnetic plug block signals, and is used to start the two electromagnetic plug blocks when the connector is removed so that they attract each other and are stored in the accommodating groove.

[0010] As a further improvement of the present application, a guide rod corresponding to the pulling cable is installed at the bottom of the bracket, and the pulling cable runs through the air permeable frame and the upper part of the battery box.

[0011] As a further improvement of the present application, a plurality of upper and lower limit frames are installed on the inner wall of the battery box, and the interior of the limit frames is connected with a compression spring made of conductive material, and the battery body is inserted into the interior of the battery box through the limit frames.

[0012] As a further improvement of the present application, the limit frame is fixedly connected to the inner wall of the battery box, and the battery body partially overlaps with the limit frame in the plugged state, and the limit frame is made of insulating material.

[0013] As a further improvement of the present application, the sum of the cross-sectional lengths of the electromagnetic plug blocks is smaller than the cross-sectional length value of the accommodating groove, and the cross-sectional area of ​​the air-permeable frame is not larger than the cross-sectional area of ​​the bottom of the wrench housing.

[0014] As another improvement of the present application, the bottom wall of the lower part of the battery box is installed with an electromagnetic stand and an adjustment drive unit located below the battery body, wherein the electromagnetic stand is symmetrically arranged, the adjustment drive unit is located at the center of the battery body, and the adjustment drive unit includes a rubber strip, two series strips are connected through the inside of the rubber strip, and a horizontal bar arranged corresponding to the series strip is arranged below the rubber strip, and both ends of the series strip and the horizontal bar are movably connected through a movable frame, and a micro electric extension plate is connected to the surface of the movable frame.

[0015] As another improvement supplement to the present application, the surface of the micro electric extension plate close to the electromagnetic block is coated with a magnetic attraction layer, and the cross-sectional width values ​​of the rubber strip, the series strip and the battery box gradually increase. In the initial state, the rubber strip is in contact with the surface of the battery body, and both ends of the rubber strip are in contact with the surface of the battery body on both sides of the lower part of the battery box.

[0016] As another improved supplement of the present application, the electromagnetic stand block is connected to the control module signal to control the adjustment drive unit to flip the battery body in the lower part of the battery box.

[0017] To sum up, when the electric wrench is in use, the connector and the snap-fitting cylinder can be used to achieve relatively convenient disassembly, assembly and splicing processing, and the use of the breathable frame can keep the airflow through the inside of the wrench shell and the battery box, so that when the wrench shell dissipates heat internally, it can also drive the internal heat of the battery box. In addition, when performing internal heat dissipation control processing, it is necessary to cooperate with a temperature sensor, so that when the heat dissipation capacity of the fan blades cannot meet the heat dissipation requirements, the lower part of the battery box can be driven to rotate with the shaft as the center with the cooperation of the drive motor and the pull cable, thereby increasing the contact heat exchange area between the battery body inside the battery box and the air, and enhancing the heat dissipation effect. In addition, with the electromagnetic stand and the adjustment drive unit, the battery body at the lower layer can be turned over to make its heat dissipation more uniform. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the overall appearance structure of the first implementation method of the present application;

[0019] Figure 2 This is an installation diagram of a brushless motor, fan blades and battery box according to the first embodiment of the present application;

[0020] Figure 3 This is a diagram of the installation of a battery box, a vent frame, and a traction cable according to the first embodiment of the present application;

[0021] Figure 4 This is an internal installation diagram of the connector and the buckle sleeve of the first embodiment of the present application;

[0022] Figure 5 This is a schematic diagram of the internal structure of a battery box according to the first embodiment of the present application;

[0023] Figure 6 For this application Figure 5 A is an enlarged schematic diagram;

[0024] Figure 7 This is a diagram showing a state in which the lower part of the battery box of the first embodiment of the present application is opened;

[0025] Figure 8 This is an installation diagram of a battery box, a limiting frame and a battery body according to the first embodiment of the present application;

[0026] Fig. 9 For this application Figure 8 The enlarged schematic diagram of point B in FIG.

[0027] Fig.10 This is an installation diagram of the electromagnetic stand block and the adjustment drive unit of the second embodiment of the present application;

[0028] Fig.11 This is an assembly diagram of an adjustment installation unit according to a second embodiment of the present application;

[0029] Fig.12 This is a state diagram of the rubber strip moving to drive the battery body to turn over in the second embodiment of the present application;

[0030] Fig.13 This is a state diagram of the rubber strip of the second embodiment of the present application leaving the surface of the battery body and returning to the electromagnetic stand on the other side.

[0031] Description of the numbers in the figure:

[0032] 1. Wrench housing; 11. Snap-fit ​​cylinder; 2. Battery box; 21. Breathable frame; 22. Connector; 23. Electromagnetic plug-in block; 24. Compression spring; 3. Brushless motor; 4. Fan blade; 5. Pull rope; 6. Rotating rod; 7. Battery body; 71. Extrusion spring; 72. Limit frame; 8. Drive motor; 9. Drive gear; 10. Driven gear; 12. Electromagnetic stand; 13. Adjustment drive unit; 131. Rubber strip; 132. Serial strip; 133. Movable frame; 134. Micro electric extension plate. DETAILED DESCRIPTION

[0033] Two implementation modes of the present application are described in detail below with reference to the accompanying drawings.

[0034] The first implementation method:

[0035] Figure 1-2 An electric wrench with a control system is shown, comprising a wrench housing 1 with a hollow interior, a brushless motor 3 installed inside the wrench housing 1, a fan blade 4 connected to the output shaft of the brushless motor 3, a snap-fitting cylinder 11 provided at the bottom of the wrench housing 1, a recess provided on the inner wall of the snap-fitting cylinder 11, a battery box 2 arranged below the wrench housing 1, and the battery box 2 is composed of two parts of the box body assembled by a shaft rod, a vent frame 21 provided at the top of the battery box 2, and a waterproof vent plate is installed in the vent frame 21, and a connector 22 having a diameter the same as the inner diameter of the snap-fitting cylinder 11 is installed on the top of the waterproof vent plate, Figure 4As shown, a receiving groove is provided inside the connector 22, a compression spring 24 is connected inside the receiving groove, and both ends of the compression spring 24 are connected to electromagnetic plug blocks 23 matching the recess;

[0036] Figure 3 and Figure 5-6 It is shown that a bracket located on one side of the connector 22 is installed on the top of the waterproof and breathable plate, a drive motor 8 is installed on the top of the bracket, the output end of the drive motor 8 is connected to the drive gear 9, and a rotating rod 6 located in front of the drive motor 8 is installed on the top of the bracket. A driven gear 10 that meshes with the drive gear 9 is fixedly sleeved on the surface of the rotating rod 6, a pulling rope 5 is wrapped around the surface of the rotating rod 6, and the tail end of the pulling rope 5 is connected to the surface of the lower part of the battery box 2.

[0037] It also includes an auxiliary control system, which includes a processor installed in the wrench housing 1, and the processor is connected to a monitoring module, an execution module and a control module. The monitoring module includes a temperature sensor installed in the wrench housing 1, which is used to monitor the temperature change in the wrench housing 1. The execution module is connected to the brushless motor 3 and the drive motor 8 by signal, and is used to control the on and off states of the brushless motor 3 and the drive motor 8. The control module is connected to the electromagnetic plug-in block 23 by signal, and is used to start the two electromagnetic plug-in blocks 23 when the connector 22 is removed so that they attract each other and are stored in the receiving groove.

[0038] A guide rod corresponding to the pulling rope 5 is installed at the bottom of the bracket, and the pulling rope 5 passes through the air-permeable frame 21 and the upper part of the battery box 2.

[0039] Specifically, when connecting the battery box 2 and the wrench housing 1, the plug-in component 22 is plugged into the buckle cylinder 11, and the two electromagnetic plug-in blocks 23 are squeezed into the interior of the receiving groove by the squeezing effect of the inner wall of the buckle cylinder 11 until the plug-in component 22 moves to the recessed position, and the electromagnetic plug-in block 23 is released and plugged into the recessed position to form a constrained connection, so that the battery box 2 and the wrench housing 1 can be connected. When the battery box 2 and the wrench housing 1 are separated, the electromagnetic plug-in block 23 needs to be started so that the two generate a force of attraction, so that the electromagnetic plug-in blocks 23 are close to each other until they are stored in the receiving groove, and then the plug-in component 22 can be pulled downward to make it separate from the buckle cylinder 11;

[0040] When the electric wrench is in use, the brushless motor 3 inside the wrench housing 1 is started and drives the fan blades 4 to rotate, promoting airflow heat exchange between the inside and outside of the wrench housing 1. At the same time, since the wrench housing 1 is hollow inside and the connection between the wrench housing 1 and the battery box 2 is connected by a waterproof breathable plate, the battery box 2 and the inside of the wrench housing 1 are in an airflow-through state, which assists in achieving internal heat dissipation of the two.

[0041] When the heat dissipation capacity of the fan blades 4 cannot meet the heat dissipation demand inside the battery box 2, that is, when the temperature inside the wrench housing 1 exceeds the heat dissipation capacity of the fan blades 4, the drive motor 8 is started, and under the meshing action of the drive gear 9 and the driven gear 10, the rotating rod 6 rotates to release the pulling rope 5, so that the upper and lower parts of the box body originally in the pulling and restraining state can be partially separated to form an open state (such as Figure 7 As shown), the lower part of the box body in the battery box 2 can increase the contact area with the air and better dissipate heat inside the lower part of the box body. During this process, due to the connection between the connector 22 and the snap-fit ​​tube 11, the upper part of the box body of the battery box 2 is constrained, so that the lower part of the box body can remain relatively static when released.

[0042] Figure 8-9 As shown, the inner wall of the battery box 2 is installed with a plurality of limit frames 72 arranged up and down, and the inside of the limit frames 72 is connected with a compression spring 71 made of conductive material, and the battery body 7 is inserted into the inside of the battery box 2 through the limit frames 72.

[0043] The limiting frame 72 is fixedly connected to the inner wall of the battery box 2, and the battery body 7 partially overlaps with the limiting frame 72 in the plugged state. The limiting frame 72 is made of insulating material.

[0044] Specifically, inside the battery box 2, the battery body 7 is constrained and connected by a compression spring 71 and a limit frame 72. When the lower part of the battery box 2 is tilted, the design of the limit frame 72 can effectively prevent the battery body 7 from being displaced due to the tilt, so that the power supply of the battery body 7 can be carried out normally.

[0045] The sum of the cross-sectional lengths of the electromagnetic plug-in block 23 is smaller than the cross-sectional length of the accommodating groove, and the cross-sectional area of ​​the air-permeable frame 21 is not larger than the cross-sectional area of ​​the bottom of the wrench housing 1 .

[0046] Specifically, the area of ​​the air-permeable frame 21 is not larger than the area of ​​the bottom of the wrench housing 1 , so when the wrench housing 1 and the battery box 2 are connected, the two can maintain more effective airflow exchange.

[0047] The second implementation method:

[0048] Figure 10-11 It is shown that the bottom wall of the lower part of the battery box 2 is installed with an electromagnetic stand 12 and an adjustment drive unit 13 located below the battery body 7, wherein the electromagnetic stand 12 is symmetrically arranged, and the adjustment drive unit 13 is located at the center of the battery body 7. The adjustment drive unit 13 includes a rubber strip 131, and two series strips 132 are connected through the inside of the rubber strip 131. A horizontal bar corresponding to the series strip 132 is arranged below the rubber strip 131, and both ends of the series strip 132 and the horizontal bar are movably connected through a movable frame 133, and a micro electric extension board 134 is connected to the surface of the movable frame 133.

[0049] The surface of the micro electric extension plate 134 close to the electromagnetic stand 12 is coated with a magnetic attraction layer, and the cross-sectional width values ​​of the rubber strip 131, the series strip 132 and the battery box 2 gradually increase. In the initial state, the rubber strip 131 is in contact with the surface of the battery body 7, and both ends of the rubber strip 131 are in contact with the surface of the battery body 7 on both sides of the lower part of the battery box 2.

[0050] The electromagnetic stand block 12 is connected to the control module signal, and is used to control the adjustment drive unit 13 to flip the battery body 7 in the lower part of the battery box 2.

[0051] What is different from the first embodiment is that, in the first embodiment, when the lower part of the battery box 2 is tilted, the battery body 7 in the upper part of the box is affected by the upper air permeable frame 21 and the open state, and is in a relatively uniform heat dissipation state, while the degree of opening between the lower half of the battery body 7 and the bottom wall of the lower part of the box of the battery box 2 is relatively low, affecting the heat exchange efficiency. Improvements are made to this phenomenon, and it can also be used to flip over the battery body 7 in the lower layer when the lower part of the box of the battery box 2 is not tilted, so as to promote heat dissipation.

[0052] Specifically, when turning over, it is necessary to start the electromagnetic stand block 12 (with Fig.12 , which is the left side), so that it attracts the magnetic layer, thereby driving the movable frame 133 and the connecting strips 132, crossbars and rubber strips 131 connected thereto to move laterally, driving the battery body 7 in contact with the rubber strip 131 to slightly flip over (as shown in FIG. Fig.12 As shown in FIG. 1 ), after the series-connected strip 132 reaches the left end position, the micro-electric extension plate 134 is activated to retract, driving the movable frame 133 to compress, thereby shortening the vertical distance between the series-connected strip 132 and the horizontal strip, so that the rubber strip 131 is separated from the surface of the battery body 7, and then the electromagnetic stand block 12 on the other side is activated, and the electromagnetic stand block 12 on one side is closed, so that the attraction force generated by the electromagnetic stand block 12 pulls the rubber strip 131 back to the right end position (as shown in FIG. 1 ). Fig.13 As shown), the micro electric extension plate 134 is then extended, driving the movable frame 133 to extend, and then the rubber strip 131 is re-attached to the surface of the battery body 7. By repeating the above steps, the battery body 7 can be turned over, so that the battery body 7 can be fully exposed to heat exchange to improve the heat exchange efficiency.

[0053] In summary, when the electric wrench is in use, the connector 22 and the snap-fit ​​tube 11 can be used to achieve relatively convenient disassembly, assembly and splicing processing, and the use of the air-permeable frame 21 can keep the airflow through the interior of the wrench housing 1 and the battery box 2, so that when the wrench housing 1 dissipates heat internally, it also drives the internal heat dissipation of the battery box 2. In addition, when performing internal heat dissipation control processing, it is necessary to cooperate with a temperature sensor, so that when the heat dissipation capacity of the fan blade 4 cannot meet the heat dissipation demand, the lower part of the box body of the battery box 2 can be driven to rotate with the shaft as the center with the cooperation of the drive motor 8 and the pull rope 5, thereby increasing the contact heat exchange area between the battery body 7 inside the battery box 2 and the air, and enhancing the heat dissipation effect. In addition, with the cooperation of the electromagnetic stand 12 and the adjustment drive unit 13, the battery body 7 at the lower layer can be turned over to make its heat dissipation more uniform.

[0054] In view of current practical needs, the above-mentioned implementation mode adopted in this application is not limited to the scope of protection. Various changes made within the knowledge scope of technical personnel in this field without departing from the concept of this application still fall within the scope of protection of the present invention.

Claims

1. An electric wrench with a control system, comprising a wrench housing (1) with a hollow interior, a brushless motor (3) installed inside the wrench housing (1), a fan blade (4) connected to the output shaft of the brushless motor (3), characterized in that: A buckling cylinder (11) is provided at the bottom of the wrench housing (1), and a recess is provided on the inner wall of the buckling cylinder (11). A battery box (2) is arranged below the wrench housing (1), and the battery box (2) is composed of two box bodies assembled by a shaft rod. A vent frame (21) is provided at the top of the battery box (2), and a waterproof vent plate is installed in the vent frame (21). A plug-in component (22) having a diameter the same as the inner diameter of the buckling cylinder (11) is installed on the top of the waterproof vent plate. A receiving groove is provided inside the plug-in component (22), and a compression spring (24) is connected to the inside of the receiving groove, and both ends of the compression spring (24) are connected to electromagnetic plug blocks (23) matching the recess. A bracket located on one side of the connector (22) is installed on the top of the waterproof and breathable plate, a driving motor (8) is installed on the top of the bracket, the output end of the driving motor (8) is connected to a driving gear (9), a rotating rod (6) located in front of the driving motor (8) is installed on the top of the bracket, a driven gear (10) meshing with the driving gear (9) is fixedly sleeved on the surface of the rotating rod (6), a pulling rope (5) is wound around the surface of the rotating rod (6), and the tail end of the pulling rope (5) is connected to the surface of the lower part of the battery box (2).

2. The electric wrench with a control system according to claim 1, characterized in that: The invention also comprises an auxiliary control system, wherein the auxiliary control system comprises a processor installed in the wrench housing (1), the processor being connected to a monitoring module, an execution module and a control module, the monitoring module comprising a temperature sensor installed in the wrench housing (1) for monitoring temperature changes in the wrench housing (1), the execution module being connected to the brushless motor (3) and the drive motor (8) by signal, for controlling the on and off states of the brushless motor (3) and the drive motor (8), and the control module being connected to the electromagnetic plug-in block (23) by signal, for activating the two electromagnetic plug-in blocks (23) when the connector (22) is removed so that the two electromagnetic plug-in blocks attract each other and are accommodated in the receiving groove.

3. The electric wrench with a control system according to claim 1, characterized in that: A guide rod corresponding to the pulling cable (5) is installed at the bottom of the bracket, and the pulling cable (5) passes through the air permeable frame (21) and the upper part of the battery box (2).

4. The electric wrench with a control system according to claim 1, characterized in that: The inner wall of the battery box (2) is provided with a plurality of upper and lower limit frames (72), and the inside of the limit frames (72) is connected with a compression spring (71) made of a conductive material, and the inside of the battery box (2) is plugged with a battery body (7) via the limit frames (72).

5. The electric wrench with a control system according to claim 4, characterized in that: The limiting frame (72) is fixedly connected to the inner wall of the battery box (2), and the battery body (7) partially overlaps with the limiting frame (72) in the plugged state. The limiting frame (72) is made of insulating material.

6. The electric wrench with a control system according to claim 1, characterized in that: The sum of the cross-sectional lengths of the electromagnetic plug-in block (23) is smaller than the cross-sectional length of the accommodating groove, and the cross-sectional area of ​​the air-permeable frame (21) is not larger than the cross-sectional area of ​​the bottom of the wrench housing (1).

7. The electric wrench with a control system according to claim 2, characterized in that: The bottom wall of the lower part of the battery box (2) is provided with an electromagnetic stand (12) and an adjustment drive unit (13) located below the battery body (7), wherein the electromagnetic stand (12) is symmetrically arranged, and the adjustment drive unit (13) is located at the center of the battery body (7), and the adjustment drive unit (13) comprises a rubber strip (131), wherein two series connecting strips (132) are connected through the inside of the rubber strip (131), and a horizontal strip corresponding to the series connecting strip (132) is arranged below the rubber strip (131), and both ends of the series connecting strip (132) and the horizontal strip are movably connected via a movable frame (133), and a micro electric extension plate (134) is connected to the surface of the movable frame (133).

8. The electric wrench with a control system according to claim 7, characterized in that: The surface of the micro electric extension plate (134) close to the electromagnetic stand (12) is coated with a magnetic attraction layer, and the cross-sectional width values ​​of the rubber strip (131), the series strip (132) and the battery box (2) gradually increase. In the initial state, the rubber strip (131) is in contact with the surface of the battery body (7), and both ends of the rubber strip (131) are in contact with the surface of the battery body (7) on both sides of the lower part of the battery box (2).

9. The electric wrench with a control system according to claim 7, characterized in that: The electromagnetic stand block (12) is connected to the control module signal and is used to control the adjustment drive unit (13) to flip the battery body (7) in the lower part of the battery box (2).

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