CN217648333U

CN217648333U - Hand-held electric tool

Info

Publication number: CN217648333U
Application number: CN202221057480.1U
Authority: CN
Inventors: 闵新林; 乐乔威; 陈会甫; 周栋; 陈磊; 蔡科雷
Original assignee: Ningbo Hanpu Tools Co ltd
Current assignee: Ningbo Hanpu Tools Co ltd
Priority date: 2022-04-27
Filing date: 2022-04-27
Publication date: 2022-10-25
Anticipated expiration: 2032-04-27

Abstract

The utility model provides a hand-held type electric tool relates to electric tool technical field. A hand-held power tool comprising: a housing; the motor is arranged in the shell; the machine head is inserted into the shell and is detachably connected with the motor; the micro switch is arranged in the shell, and a trigger structure of the micro switch is arranged on a path of the machine head moving from a separation state to a combination state; when the machine head is in a separation state, the micro switch is in an opening and closing state, and when the machine head is in a combination state, the micro switch is in a closing state. Through setting up micro-gap switch to set up micro-gap switch's trigger structure in the aircraft nose from the path of separation state motion to the joint state, make this hand-held type machine tool can judge whether the aircraft nose combines the fuselage through micro-gap switch's state, thereby do not supply power to the motor when micro-gap switch is in the open and shut state, avoid the motor mistake to start and produce the risk.

Description

Hand-held electric tool

Technical Field

The utility model belongs to the technical field of electric tool, concretely relates to hand-held type electric tool.

Background

There are many electric tools on the market, such as: the electric tools have different functions, but the principles are mostly similar, and the electric tools are mainly provided with a machine body and a machine head, wherein the machine body is internally provided with a driving motor, an output shaft of the driving motor transmits power to a working assembly of the machine head through a transmission assembly, so that the working assembly rotates or shakes, and related functions of polishing, sanding, curve cutting, drilling or shoveling and the like are realized. In order to save cost, related personnel design the aircraft nose casing and the fuselage casing for detachable connection, and the user can install different aircraft noses on the fuselage according to the work needs, need not to purchase the electric tool of many different functions, has saved the purchase cost.

Chinese patent publication No. CN103722537B discloses a multi-head electric tool, which comprises a connection disc, a motor output shaft, a limit ring, a connector, a T-shaped chute, a T-shaped slide rail, a machine head shell, a rubber sleeve, a transmission shaft, a spring, a toggle head, an embedded block, a wedge block, a pushing block, a positioning step, a protrusion and a limit groove.

The scheme is not provided with a mechanism for detecting whether the machine head is connected with the machine body, and the motor can be started under the condition that the machine head is not connected, so that accidental injury can be caused.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide one kind and can detect whether the aircraft nose connects, only the hand-held type electric tool that the aircraft nose connection could just start.

The purpose of the utility model can be realized by the following technical proposal: a hand-held power tool comprising: a housing; a motor disposed within the housing; the machine head is inserted into the shell and is detachably connected with the motor; the micro switch is arranged in the shell, and a trigger structure of the micro switch is arranged on a path of the handpiece moving from a separation state to a combination state; when the machine head is in a separation state, the micro switch is in an opening and closing state, and when the machine head is in a combination state, the micro switch is in a closing state.

As a further improvement of the utility model, the aircraft nose is close to one side of micro-gap switch is provided with grafting portion, be provided with the slot on the casing, grafting portion inserts and locates in the slot.

As a further improvement, the micro switch is arranged below the slot, the trigger structure of the micro switch stretches into the slot, the insertion part is provided with a support surface, and when the machine head is in a combined state, the micro switch is abutted against the surface.

As a further improvement of the utility model, the abutting surface is a plane, and the length of the micro switch is greater than 50% of the length of the abutting surface.

As a further improvement of the utility model, the utility model also comprises: the controller is respectively electrically connected with the microswitch, the motor and the battery pack, and the microswitch is electrically connected with the battery pack.

As a further improvement of the present invention, a first signal port is provided on the controller, a second signal port is provided on the battery pack, and the micro switch is connected in series between the first signal port and the second signal port.

As a further improvement, the utility model also comprises a locking mechanism, the locking mechanism is arranged in the motor with between the aircraft nose, locking mechanism one end with the aircraft nose is connected, the locking mechanism other end with the motor is connected.

As a further improvement of the utility model, locking mechanical system includes first joint portion and second joint portion, first joint portion with the aircraft nose is connected, second joint portion with the motor is connected, first joint portion is inserted and is located in the second joint portion, first joint portion with the rotatory locking of second joint portion.

As a further improvement, the locking mechanism further comprises a locking knob, a protrusion is arranged in the first clamping portion, and the locking knob is sleeved on the protrusion.

As a further improvement of the present invention, the locking knob is set to two, and two the locking knob is symmetrical around the center of the motor shaft.

Based on the technical scheme, the utility model discloses can produce following technological effect at least:

1. by arranging the microswitch and arranging the trigger structure of the microswitch on a path for the machine head to move from the separation state to the combination state, when the machine head is in the separation state, the microswitch is in the opening and closing state, when the machine head is in the combination state, the microswitch is in the closing state, so that the handheld machine tool can judge whether the machine head is combined with the machine body or not through the state of the microswitch, power is not supplied to the motor when the microswitch is in the opening and closing state, and the risk caused by the false starting of the motor is avoided;

2. the insertion part is arranged on one side, close to the microswitch, of the machine head, the insertion groove is formed in the shell, and the insertion part is inserted into the insertion groove, so that the connection between the machine head and the machine body is firmer;

3. the trigger structure of the microswitch is arranged in the slot, so that the microswitch can be triggered when the inserting part is inserted into the slot, and the microswitch is simple in structure and high in reliability;

4. because each part or deformation or relative position offset occur after the electric tool has long practical time, if the micro switch is too small, the triggering structure of the micro switch can not be triggered by the abutting surface, and the length of the micro switch is 50 percent of the length of the abutting surface by setting the abutting surface as a plane, so that the micro switch is not easy to be triggered due to slight deformation and displacement of each part on the machine head or the machine body, and the failure risk is reduced;

5. the state change of the microswitch can be used for controlling whether the battery pack supplies power to the motor through the controller or not by electrically connecting the microswitch with the controller and the battery pack respectively;

6. the locking mechanism is arranged between the machine head and the motor, so that the machine head and the motor can be locked after being combined, firm installation is ensured, and the machine head and the motor cannot be separated in the using process;

7. by the aid of the locking knob, when an operator uses the handheld machine tool, the machine head and the motor can be easily and conveniently locked and unlocked;

8. by setting the two locking knobs to be symmetrical around the center of the motor shaft, when an operator uses the handheld machine tool, the operator can hold the machine body by using any one hand, the other hand is used for installing the machine head, and the locking knobs are rotated to lock the machine body, so that the operator can conveniently use the handheld machine tool by using a right hand or a left hand.

Drawings

Fig. 1 is a schematic structural view of the handheld electric tool of the present invention.

Fig. 2 is a sectional view of the hand-held power tool of the present invention.

Fig. 3 is a schematic diagram of a head, a locking mechanism and a motor of the hand-held power tool of the present invention.

Fig. 4 is a schematic view of the hand-held electric tool head of the present invention when separated from the body.

Fig. 5 is a schematic view of the hand-held electric tool head of the present invention when combined with the body.

In the figure, 100, the housing; 110. inserting slots; 200. a motor; 300. a machine head; 310. a plug-in part; 311. an abutting surface; 400. a microswitch; 500. a controller; 510. a first signal port; 600. a battery pack; 610. a second signal port; 700. a locking mechanism; 710. a first clamping part; 711. a pushing block; 720. a second clamping part; 721. a wedge block; 730. and a locking knob.

Detailed Description

It should be noted that all the directional indicators (such as up, down, left, right, front, back \8230;) in the embodiments of the present invention are only used to explain the relative position relationship between the components, the motion situation, etc. in a specific posture (as shown in the attached drawings), and if the specific posture is changed, the directional indicator is changed accordingly. Furthermore, the descriptions of the embodiments as "first," "second," "a," etc. in this disclosure are for descriptive purposes only and are not to be construed as indicating or implying relative importance or to imply that the number of the indicated features is indicative. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise. In the present application, unless expressly stated or limited otherwise, the terms "connected" and "fixed" are to be construed broadly, e.g., "fixed" may be fixedly connected or detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be interconnected within two elements or in a relationship where two elements interact with each other unless otherwise specifically limited. The specific meaning of the above terms in the present invention can be understood according to specific situations by those of ordinary skill in the art. In addition, the technical solutions of the embodiments of the present invention can be combined with each other, but it is necessary to use a person skilled in the art to realize the basis, and when the technical solutions are combined and contradictory to each other or cannot be realized, the combination of the technical solutions should not exist, and is not within the protection scope of the present invention.

The following is a detailed embodiment of the present invention, and the technical solution of the present invention is further described with reference to fig. 1 to 5, but the present invention is not limited to the following embodiment.

The utility model provides a hand-held type electric tool machine, includes aircraft nose 300 and fuselage, and aircraft nose 300 and fuselage can dismantle the connection, and the fuselage includes casing 100, motor 200 and micro-gap switch 400, and motor 200 sets up in casing 100, and aircraft nose 300 inserts and locates in casing 100, and aircraft nose 300 can dismantle with motor 200 and be connected, and micro-gap switch 400 sets up in casing 100, and micro-gap switch 400's trigger structure sets up on aircraft nose 300 moves the route to the bonding state from the disconnect-state. When the handpiece 300 is in the separated state, the micro switch 400 is in the open-close state, and when the handpiece 300 is in the combined state, the micro switch 400 is in the closed state. Through setting up micro-gap switch 400, and set up micro-gap switch 400's trigger structure on the route that aircraft nose 300 moved to the joint state from the separate state, when aircraft nose 300 was in the separate state, micro-gap switch 400 was in the state of opening and shutting, when aircraft nose 300 was in the joint state, micro-gap switch 400 was in the closure state, make this hand-held type machine tool can judge whether aircraft nose 300 combines the fuselage through micro-gap switch 400's state, thereby do not supply power to motor 200 when micro-gap switch 400 was in the state of opening and shutting, avoid motor 200 false start to produce the risk.

Specifically, an insertion portion 310 is disposed on a side of the handpiece 300 close to the micro switch 400, the housing 100 is provided with a slot 110, and the insertion portion 310 is inserted into the slot 110. In this embodiment, the insertion slot 110 is a T-shaped sliding slot, and the insertion portion 310 is provided with a T-shaped sliding rail that slides in cooperation with the T-shaped sliding slot, and the direction in which the T-shaped sliding slot slides in cooperation with the T-shaped sliding rail is the same as the direction in which the handpiece 300 moves when inserted into the body. Through set up grafting portion 310 in the aircraft nose 300 near one side of micro-gap switch 400, be provided with slot 110 on the casing 100, grafting portion 310 is inserted and is located in slot 110 for the connection of aircraft nose 300 and fuselage is more firm, increases to set up T shape spout and T shape slide rail and can play the direction when the fuselage is connected with aircraft nose 300 and increase joint strength's effect.

Further, the micro switch 400 is disposed below the slot 110, the trigger structure of the micro switch 400 extends into the slot 110, the insertion portion 310 is provided with a support surface 311, and when the handpiece 300 is in a combined state, the micro switch 400 supports against the support surface 311. By arranging the trigger structure of the microswitch 400 in the slot 110, the microswitch 400 can be triggered when the plug part 310 is inserted into the slot 110, and the microswitch 400 has a simple structure and high reliability.

Preferably, the abutting surface 311 is provided as a plane, and the length of the micro switch 400 is more than 50% of the length of the abutting surface 311. Because each part is deformed or the relative position is deviated after the electric tool is used for a long time, if the micro switch 400 is too small, the triggering structure of the micro switch 400 is smaller than the length of the abutting surface 311 and is not triggered, and the abutting surface 311 is a plane, the length of the micro switch 400 is more than 50% of the length of the abutting surface 311, so that the micro switch 400 is not easy to be triggered due to the slight deformation and displacement of each part on the machine head 300 or the machine body, and the failure risk is reduced.

The utility model discloses hand-held type electric tool still includes: the controller 500 is electrically connected with the micro switch 400, the motor 200 and the battery pack 600 respectively, and the micro switch 400 is electrically connected with the battery pack 600. Specifically, the controller 500 is provided with a first motor interface, a second motor interface, a first battery interface, and a second battery interface, where the first motor interface is connected to the positive pole of the motor 200, the second motor interface is connected to the negative pole of the motor 200, the first battery interface is connected to the positive pole of the battery pack 600, and the second battery interface is connected to the negative pole of the battery pack 600. The controller 500 is further provided with a first signal port 510, the battery pack 600 is provided with a second signal port 610, and the micro switch 400 is connected in series between the first signal port 510 and the second signal port 610. When the handpiece 300 is separated from the body, the microswitch 400 is in an open-close state, the first signal port 510 and the second signal port 610 cannot communicate, the battery pack 600 cannot supply power to the motor 200 through the controller 500, when the handpiece 300 is combined with the body, the microswitch 400 is pushed by the handpiece 300 to be in a closed state, the first signal port 510 and the second signal port 610 can communicate, and the battery pack 600 can supply power to the motor 200 through the controller 500. By electrically connecting the micro switch 400 to the controller 500 and the battery pack 600, respectively, the state change of the micro switch 400 can be used to control whether the battery pack 600 supplies power to the motor 200 through the controller 500.

Further, the utility model discloses hand-held type electric tool still includes locking mechanical system, and locking mechanical system sets up between motor 200 and aircraft nose 300, and locking mechanical system one end is connected with aircraft nose 300, and the locking mechanical system other end is connected with motor 200. By arranging the locking mechanism between the handpiece 300 and the motor 200, the handpiece 300 and the motor 200 can be locked after being combined, so that firm installation is ensured, and the handpiece 300 and the motor 200 cannot be separated in the using process.

Specifically, the locking mechanism includes a first clamping portion 710 and a second clamping portion 720, the first clamping portion 710 is connected to the handpiece 300, the second clamping portion 720 is connected to the motor 200, the first clamping portion 710 is inserted into the second clamping portion 720, and the first clamping portion 710 and the second clamping portion 720 are locked in rotation. The locking mechanism further comprises a locking knob 730, a protrusion is disposed on the first clamping portion 710, and the locking knob 730 is sleeved on the protrusion. The locking knob 730 partially protrudes from the surface of the housing 100 for rotation by the operator. By the locking knob 730, the operator can easily and conveniently lock and unlock the handpiece 300 and the motor 200 when using the hand-held power tool. In this embodiment, the first fastening portion 710 is configured as a connector, the second fastening portion 720 is configured as a limiting ring, an inserting device is arranged between the connector and the limiting ring, the inserting device is composed of at least two wedges 721 and pushing blocks 711 having the same number as the wedges 721, the wedges 721 are uniformly distributed on the inner circular surface of the limiting ring along the circumference, the wedges 721 are provided with inclined surfaces, the heads of the connectors are hollow circular cylinders, the pushing blocks 711 are uniformly distributed on the outer circumferential surface of the connectors along the outer circumference, and the pushing blocks 711 are provided with inclined surfaces which are matched with the inclined surfaces of the wedges 721 to slide when the connectors are inserted into the limiting ring. When the connector is inserted into the limit ring, the plug device axially fixes the connector, and when the locking knob 730 is toggled to drive the limit ring to rotate, the plug device axially disengages the connector.

Preferably, the locking knobs 730 are provided in two, and the two locking knobs 730 are symmetrical about the axial center of the motor 200. By setting the two locking knobs 730 and making the two locking knobs 730 symmetrical around the axis of the motor 200, when an operator uses the hand-held power tool, the operator can hold the machine body with any one hand, the other hand is used for installing the machine head 300, and the locking knobs 730 are rotated to lock the machine body, so that the operator can conveniently use the machine body with a right hand or a left hand.

The utility model discloses a theory of operation: the micro switch 400 is connected in series between the first signal port 510 of the controller 500 and the second signal port 610 of the battery pack 600, when the handpiece 300 is separated from the body, the micro switch 400 is in an open-close state, the first signal port 510 and the second signal port 610 cannot communicate, the battery pack 600 cannot supply power to the motor 200 through the controller 500, when the handpiece 300 is combined with the body, the micro switch 400 is pushed by the handpiece 300 to be in a closed state, the first signal port 510 and the second signal port 610 can communicate, and the battery pack 600 can supply power to the motor 200 through the controller 500. Whether the handpiece 300 is combined with the machine body or not is judged through the state of the microswitch 400, so that power is not supplied to the motor 200 in the state that the handpiece 300 is separated, and the risk caused by the false start of the motor 200 is avoided.

The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. A hand-held power tool, comprising:

a housing;

a motor disposed within the housing;

the machine head is inserted into the shell and is detachably connected with the motor;

the micro switch is arranged in the shell, and a trigger structure of the micro switch is arranged on a path of the handpiece moving from a separation state to a combination state;

when the machine head is in a separation state, the micro switch is in an opening and closing state, and when the machine head is in a combination state, the micro switch is in a closing state.

2. The hand-held power tool according to claim 1, wherein a plug-in portion is provided on a side of the tool head adjacent to the micro switch, and a slot is provided on the housing, and the plug-in portion is inserted into the slot.

3. The hand-held electric tool according to claim 2, wherein the micro switch is disposed below the slot, the trigger structure of the micro switch extends into the slot, the insertion portion is provided with an abutting surface, and when the handpiece is in a combined state, the micro switch abuts against the abutting surface.

4. The hand held power tool according to claim 3, wherein the abutment surface is planar and the length of the microswitch is greater than 50% of the length of the abutment surface.

5. The hand-held power tool of claim 1, further comprising: the controller is respectively electrically connected with the microswitch, the motor and the battery pack, and the microswitch is electrically connected with the battery pack.

6. The hand held power tool according to claim 5, wherein the controller has a first signal port disposed thereon, the battery pack has a second signal port disposed thereon, and the micro switch is connected in series between the first signal port and the second signal port.

7. The hand-held power tool of claim 1, further comprising a locking mechanism disposed between the motor and the handpiece, the locking mechanism having one end connected to the handpiece and another end connected to the motor.

8. The hand-held power tool of claim 7, wherein the locking mechanism includes a first clamping portion and a second clamping portion, the first clamping portion is connected to the handpiece, the second clamping portion is connected to the motor, the first clamping portion is inserted into the second clamping portion, and the first clamping portion and the second clamping portion are locked in rotation.

9. The hand held power tool according to claim 8, wherein the locking mechanism further comprises a locking knob, and the first engaging portion is provided with a protrusion, and the locking knob is sleeved on the protrusion.

10. The hand held power tool according to claim 9, wherein the locking knobs are provided in two, and the two locking knobs are symmetrical about a center of the motor shaft.