TWI698308B - Control device of open type electric tool - Google Patents

Abstract

A control device for an open-type electric tool includes a ratchet assembly and a drive circuit. When the clamping piece of the open-type electric tool rotates in the forward direction through a gear set driven by the motor, if the drive circuit detects the load of the motor When a tightening value is reached, the drive circuit drives the motor to stop driving the clamping piece to rotate; when the clamping piece is driven to rotate in the counter-rotation direction and the clamping piece rotates to the alignment position where the opening is open, the ratchet assembly is synchronously positioned The gear set causes the load of the motor to exceed a set value, and the drive circuit also stops the motor from driving the clamping piece to rotate, so that the present invention can quickly, accurately and simply control the clamping piece to be located in the alignment position, reducing operation steps and time, and reducing Waste and improve process efficiency.

Description

Control device for opening type electric tool

The present invention relates to power tools, and particularly refers to a control device for an open-type power tool.

Pipes such as oil pipes or gas pressure pipes are usually bent and extended, and then the nut joints arranged at the ends of the pipes are combined with the seat joints to form a passage for liquid or gas flow. If you want to assemble the above pipeline, in addition to manually turning the nut joints one by one with an open-ended wrench, you can also use an open-type power tool to quickly and massively perform rotating operations.

Open-type power tools can be electric or pneumatic, and most of them are provided with a hollow clamping piece that can be driven. The clamping piece has an opening to allow the pipeline to pass through the hollow part, and then use the clamping piece to nest The nut joint drives the rotation so that the nut joint can be tightened or released.

However, during the process of driving the clamping piece of the aforementioned open-ended power tool, if the clamping piece is not rotated to the correct position due to careless operation or not following the correct steps, it will often happen that the clamping piece cannot be moved out. The pipe or nut joint causes the user to repeatedly try to rotate the opening of the clamp to the correct position, so that the open-type power tool can be separated from the pipe.

Therefore, the main purpose of the present invention is to provide a control device for an open-ended electric tool, which can quickly, accurately and simply control the clamping member to be positioned at the alignment position, reducing operation steps and time, reducing waste and improving process efficiency.

In order to achieve the aforementioned purpose, the present invention provides a control device for an open-type electric tool. The open-type electric tool includes a motor that drives a clamping member with an opening to rotate in a forward or reverse direction through a gear set. The control device includes a ratchet assembly and a drive circuit. When the clamping member is driven to rotate in the forward direction, if the drive circuit detects that the load of the motor reaches a tightening value, the drive circuit drives the The motor stops driving the clamping member to rotate; when the clamping member is driven to rotate in the reverse rotation direction and the clamping member rotates to the alignment position where the opening is open, the ratchet assembly synchronously positions the gear set , So that the load of the motor exceeds a set value, the drive circuit also stops the motor to drive the clamping member to rotate; so that the present invention can quickly, accurately and simply control the clamping member to be in the alignment position, reducing operation steps and time , Reduce waste and improve process efficiency.

Preferably, the ratchet assembly has a ratchet block and a reset piece, the ratchet block is arranged adjacent to the clamping piece, and the elastic force of the reset piece drives the ratchet block to deflect toward a positioning portion of the gear set , When the clamping member rotates in the forward direction, the ratchet block will not be inserted into the positioning part, when the clamping member rotates in the reverse direction until the ratchet block is embedded in the positioning part, the gear set no longer rotates and The opening of the clamping piece is in an open alignment position toward the front of the main body.

Preferably, the open-type electric tool has a linear structure.

Preferably, the open-type electric tool includes a body and a detachable lithium battery for supplying electric energy, the body is provided with the motor and the gear set, and the motor receives the electric power provided by the lithium battery to drive the gear set.

The detailed structure or features provided by the present invention will be described in the detailed description of the following implementation manners. However, those skilled in the art should understand that the detailed description and specific examples for implementing the present invention are only used to illustrate the present invention and are not intended to limit the protection scope of the present invention.

Hereinafter, the technical content and features of the present invention will be described in detail by listing preferred embodiments and drawings. The present invention can be widely applied to open-ended electric tools of various forms or specifications. Those skilled in the art can understand the descriptive terms of this embodiment. It is a general description that does not limit the application field. For example, the material or shape terms include but are not limited to the material or shape specified by the description, and the position terms include but are not limited to setting, approaching, connecting, or adjoining. The term "one" for the quantity of each element includes the quantity of one and more than one element. The directional adjectives such as "up", "down", "inner", "outer", "top" and "bottom" mentioned in the content of this manual are just examples of descriptive terms based on the normal direction of use, not as The intention to limit the scope of the claim.

As shown in Figures 1 and 2, the split-type power tool in the present preferred embodiment uses a linear structure as an example. The split-type power tool provided by the present invention includes a body 10 and a detachable lithium battery that supplies electrical energy. The battery 12, the body 10 is provided with a motor 14 and a gear set 16 connected to the motor 14. The motor 14 receives the electric energy provided by the lithium battery 12 to drive the gear set 16, and then drives a gear set 16 at the front end of the body 10 through the gear set 16 and has an opening 20 The clamping member 18 rotates in the forward or reverse rotation direction.

As shown in FIG. 3, the control device 22 includes a ratchet assembly 24 and a drive circuit 26. The ratchet assembly 24 has a ratchet block 28 and a reset piece 30. The ratchet block 28 is provided at the front end of the body 10 adjacent to the clamping piece. 18. The restoring member 30 in this preferred embodiment is an example of a torsion spring. The reset member 30 is disposed between the main body 10 and the ratchet block 28, and its elastic force can drive the ratchet block 28 to swing toward a positioning portion 32 of the gear set 16. When the clamping member 18 rotates in the forward rotation direction, the ratchet block 28 will not be inserted into the positioning portion 32 of the gear set 16, as shown in FIG. 4, when the clamping member 18 rotates in the reverse rotation direction until the ratchet block 28 is embedded in the positioning portion 32. The gear set 16 no longer rotates, and the opening 20 of the clamping member 18 is open toward the front of the main body 10, that is, the opening 20 faces the alignment position.

The drive circuit 26 of the control device 22 is electrically connected to the motor 14. When the user activates the motor 14 through the operation switch of the open-type power tool, the motor 14 uses the gear set 16 to drive the clamping member 18 to rotate in the aforementioned forward direction, and then rotate Tightening an oil pipe joint, the motor 14 generates different load values according to the action state between the clamping member 18 and the oil pipe joint, and the drive circuit 26 can also obtain the load value of the motor 14 in real time.

When the clamping member 18 is driven by the gear set 16 to rotate in the forward direction and the oil pipe joint is tightened, if the drive circuit 26 detects that the load value of the motor 14 corresponds to a tightened value, the drive circuit 26 stops the motor immediately 14. The motor 14 cannot drive the clamping member 18 to rotate. At this time, if the opening 20 of the clamping member 18 is not in the open alignment position, the user then activates the motor 14 through the operation switch assembly of the open-type electric tool to drive the gear set 16 to drive the clamping member 18 to rotate in the counter-rotation direction. When the opening of the clamping member 18 turns to the open alignment position, the ratchet block 28 of the ratchet assembly 24 positions the gear set 16, so that the load of the motor 14 exceeds a set value, and the drive circuit 26 also stops the motor 14 , The motor 14 can no longer drive the clamping member 18 to rotate, and the oil pipe can be separated from the opening 20 of the clamping member 18 from the open-ended electric tool.

With the above components, the present invention directly uses the drive circuit 26 to detect the load condition of the motor 14 to control the rotation of the gear set 16 and the clamping member 18, regardless of whether the clamping member 18 is screwed in the positive direction when the tubing joint is tightened. The tightening value controls the running state of the motor 14 so that the tubing joint has sufficient and accurate tightening force. The clamping member 18 can also be positioned through the control device 22 in the open alignment position of the opening, which is convenient for opening-type electric tools It is separated from the tubing to achieve the purpose of fast, accurate and simple control of the clamping piece in the alignment position, reducing operation steps and time, reducing waste and improving process efficiency.

10: body 12: Lithium battery 13: Operation switch group 14: Motor 16: gear set 18: Clamping parts 20: opening 22: control device 24: Ratchet assembly 26: drive circuit 28: ratchet block 30: reset piece 32: positioning part

Fig. 1 is a perspective view of an open-type power tool provided by a preferred embodiment of the present invention. 2 is a schematic diagram of the composition of a preferred embodiment of the present invention, Fig. 3 is a partial cross-sectional view of a preferred embodiment of the present invention, which shows that the opening of the clamping member is deviated from the alignment position. Fig. 4 is similar to Fig. 3, and mainly shows that the clamping member is located in the alignment position where the opening is open.

14: Motor

16: gear set

18: Clamping parts

22: control device

24: Ratchet assembly

26: drive circuit

Claims (4)

A control device for an open-type electric tool. The open-type electric tool includes a motor that drives a clamping member with an opening to rotate in a forward or reverse direction through a gear set. The control device includes a ratchet assembly and A driving circuit, when the clamping member is driven to rotate in the forward direction, if the driving circuit detects that the load of the motor reaches a tightening value, the driving circuit drives the motor to stop driving the clamping member to rotate; When the clamping member is driven to rotate in the counter-rotation direction and the clamping member rotates to the alignment position where the opening is open, the ratchet assembly synchronously positions the gear set so that the load of the motor exceeds a set Value, the drive circuit also stops the motor to drive the clamping member to rotate. According to claim 1, the control device of an open-type electric tool, wherein the ratchet assembly has a ratchet block and a resetting piece, the ratcheting block is arranged adjacent to the clamping piece, and the elastic force of the resetting piece drives the ratchet The block yaws towards a positioning part of the gear set. When the clamping part rotates in the forward direction, the ratchet block will not be embedded in the positioning part. When the clamping part rotates in the reverse rotation direction until the ratchet block is inserted The positioning part, the gear set no longer rotates and the opening of the clamping piece is in an open alignment position toward the front of the body. According to claim 1, the control device of an open-ended electric tool, wherein the open-ended electric tool has a linear structure. The control device for an open-type electric tool according to claim 1, wherein the open-type electric tool includes a body and a detachable lithium battery for supplying electric energy, the body is provided with the motor and the gear set, and the motor receives the The electric energy provided by the lithium battery drives the gear set.

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