CN219980608U - Power tool with speed regulating device - Google Patents

Abstract

The utility model provides a power tool with speed adjusting device, including the motor, power control assembly and speed adjusting device, power control assembly continuously controls the power of motor so that the speed of motor can continuous variation, speed adjusting device and power control assembly coupling, speed adjusting device is including adjusting part and the fender that links to each other in proper order, be equipped with a plurality of gear positions on the fender, the adjusting part can be for the fender removes to any one of a plurality of gear positions, the speed of motor is changed according to the gear position that the adjusting part is located to the power control assembly, the stepless speed regulation is realized to the power of power tool accessible power control assembly continuous control motor, and can increase the gear through speed adjusting device's adjusting part and fender and the change of gear sense in the speed regulation in-process, the user of being convenient for perceives the speed.

Description

Power tool with speed regulating device

Technical Field

The utility model relates to the technical field of power tools, in particular to a power tool with a speed regulating device.

Background

Nowadays, power tools such as mowers, leaf blowers, snow blowers, blowing and sucking machines, chain saws and the like are widely applied to the periphery of industries, buildings, gardens, household work and houses, and great convenience is brought to the work and life of people. Various power tools are usually driven by a motor to work, and the motor is required to be regulated in order to adapt to different working conditions.

The potentiometer or the sensor is generally adopted to realize the speed regulation of the motor, and a user cannot grasp the speed of the motor in the speed regulation process, so that the user is not benefited to perceive the change of the speed.

Disclosure of Invention

The utility model aims to provide a power tool with a speed regulating device, which can increase gear feeling.

The utility model provides a power tool with a speed regulating device, which comprises:

a motor;

a power control assembly that continuously controls the power of the motor so that the speed of the motor can be continuously varied;

a speed regulating device coupled to the power control assembly;

the speed regulating device comprises a regulating part and a gear plate which are sequentially connected, a plurality of gear positions are arranged on the gear plate, the regulating part can move to any one of the gear positions relative to the gear plate, and the power control assembly changes the speed of the motor according to the gear position where the regulating part is located.

In an embodiment, the adjusting member is connected with the gear plate through a rotation shaft, the adjusting member can rotate around the rotation shaft relative to the gear plate, one end of the adjusting member is connected with the gear plate, a handle for a user to operate is arranged at the other end of the adjusting member, the handle has a plurality of rotation positions, and the rotation positions correspond to the gear positions one by one.

In an embodiment, at least one accommodating groove is formed in one end, connected with the gear plate, of the adjusting piece, an elastic piece and a movable piece are arranged in each accommodating groove, the movable piece is abutted between the elastic piece and the gear plate, and the handle is rotated to enable the handle to move to any one of the rotating positions, so that the movable piece is abutted with the gear position.

In an embodiment, when two accommodating grooves are formed in the adjusting piece, one elastic piece and one movable piece are arranged in each accommodating groove, two rows of gear positions corresponding to the two accommodating grooves are formed in the gear plate, the distance from each accommodating groove to the rotating shaft is unequal, the distance from the gear position on each row to the rotating shaft is equal, the distances from the gear positions on different rows to the rotating shaft are unequal, the distances from the gear positions on different rows to the rotating shaft are staggered in the circumferential direction taking the rotating shaft as the center of a circle, and the two movable pieces are alternately clamped into the gear positions on different rows.

In an embodiment, when the movable member abuts against the gear position, the compression length of the elastic member is D1; when the movable piece is not in abutting connection with the gear position and is in a moving state, the compression length of the elastic piece is D2, and D1 is smaller than D2.

In one embodiment, the movable member is a ball, roller or cone.

In an embodiment, the power control assembly includes a magnetic member, a hall element and a hall plate, the hall element is connected to the hall plate, the hall element and the magnetic member are oppositely arranged with a gap, the magnetic member is in a strip arc shape, and the center of the magnetic member is located on the rotating shaft.

In an embodiment, the adjusting member includes a body portion and a connecting portion, one end of the connecting portion along the axis direction of the rotation shaft is connected to the body portion, the other end is connected to the handle, and two protrusions are disposed at one end of the body portion along the axis direction of the rotation shaft, which is close to the connecting portion.

In one embodiment, the two protrusions are disposed on the outer side wall of the adjusting member and are spaced apart in the circumferential direction of the outer side wall, a slot is formed between the two protrusions, and the magnetic member is accommodated in the slot.

In one embodiment, the hall element and the hall plate are fixedly connected to the main housing of the power tool, the handle is rotated to enable the adjusting piece to move, the hall element senses the magnetic field intensity change of the magnetic piece and converts the sensed magnetic field intensity change into an electric signal to be transmitted to the hall plate, and then the speed of the motor is adjusted.

In the power tool with the speed regulating device provided by the embodiment of the utility model, stepless speed regulation can be realized by continuously controlling the power of the motor through the power control component, and the gear sense can be increased in the speed regulating process through the regulating piece of the speed regulating device and a plurality of gear positions on the gear plate, so that a user can conveniently perceive the change of the speed.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Fig. 1 is a block diagram of a power tool with a speed governor according to an embodiment of the present utility model.

FIG. 2 is a schematic view of an angle structure of the governor device of the power tool of FIG. 1 with the handle and a portion of the power control assembly removed.

FIG. 3 is a schematic view of another angular configuration of the governor device of the power tool of FIG. 1 with the handle and portions of the power control assembly removed.

FIG. 4 is a schematic view of an angle structure of a portion of the power control assembly of the power tool of FIG. 1.

FIG. 5 is a schematic view of another angular configuration of a governor device and a portion of a power control assembly of the power tool of FIG. 1.

FIG. 6 is a schematic diagram of a regulator and a portion of a power control assembly of the governor device of the power tool of FIG. 1.

Detailed Description

Specific embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art without making any inventive effort, are intended to be within the scope of the present utility model.

In the description of the present utility model, unless explicitly stated and limited otherwise, the terms "disposed," "mounted," "connected," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium. The specific meaning of the terms described above will be understood to those of ordinary skill in the art in a specific context.

The terms "upper," "lower," "left," "right," "front," "rear," "top," "bottom," "inner," "outer," and the like are used as references to orientations or positional relationships based on the orientation or positional relationships shown in the drawings, or the orientation or positional relationships in which the inventive product is conventionally disposed in use, merely for convenience of description and simplicity of description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be configured and operated in a particular orientation, and therefore are not to be construed as limiting the utility model.

The terms "first," "second," "third," and the like, are merely used for distinguishing between similar elements and not necessarily for indicating or implying a relative importance or order.

The terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a list of elements does not include only those elements but may include other elements not expressly listed.

Referring to fig. 1, a power tool with a speed regulating device according to an embodiment of the present utility model includes a motor 11, a power control assembly 13, and a speed regulating device 15. The power control assembly 13 continuously controls the power of the motor 11 to enable a continuous change in the speed of the motor 11. The governor device 15 is coupled to the power control assembly 13. Referring to fig. 2 and 3, the speed adjusting device 15 includes an adjusting member 151 and a gear plate 153 connected in sequence, a plurality of gear positions 1532 are disposed on the gear plate 153, the adjusting member 151 can move to any one of the gear positions 1532 relative to the gear plate 153, and the power control assembly 13 changes the speed of the motor 11 according to the gear position 1532 where the adjusting member 151 is located.

In the power tool of the embodiment, stepless speed regulation can be realized by continuously controlling the power of the motor through the power control assembly, and gear feeling can be increased in the speed regulation process through the regulating piece of the speed regulation device and the gear plate, so that a user can conveniently perceive the change of the speed.

In this embodiment, the motor 11 is used to power a power tool such as a mower, blower, trimmer, chain saw, etc.

In this embodiment, the power control assembly 13 includes a magnetic member 131, a hall element 133, and a hall plate 135, the hall element 133 is connected to the hall plate 135, and the hall element 133 is disposed opposite to the magnetic member 131 with a gap therebetween. The hall element 133 and the hall plate 135 are fixedly connected to the main housing of the power tool, the adjusting member 151 is moved, the hall element 133 senses the magnetic field intensity variation of the magnetic member 131 and converts the sensed magnetic field intensity variation into an electric signal to be transmitted to the hall plate 135, and thus the speed of the motor 11 is adjusted. Specifically, the magnetic member 131 may be disposed on the adjusting member 151, and move along with the movement of the adjusting member 151, and during the movement of the adjusting member 151 relative to the gear plate 153, the relative position of the magnetic member 131 and the hall element 133 also changes, so that the magnetic field strength of the hall element 133 induced to the magnetic member 131 also changes. It will be appreciated that the positions of the magnetic member 131 and the hall element 133 may be interchanged, i.e., the hall element 133 is provided on the adjustment member 151, and the magnetic member 131 is fixedly connected to the main housing of the power tool.

Specifically, the power control assembly 13 may further include a main control board 137, the hall plate 135 is connected to the main control board 137, and the main control board 137 is connected to the motor 11 to adjust an input parameter (e.g., an input voltage) of the output motor 11 according to the electric signal varying according to the magnetic field strength, thereby adjusting the speed of the motor 11. It will be appreciated that the main control board 137 may be omitted, and the input parameter (e.g., input voltage) of the motor 11 may be directly output through the hall plate 135, so as to adjust the speed of the motor 11.

Specifically, the power tool may further include a switch board 17, where the switch board 17 is connected to the main control board 137, and the switch board 17 is configured to receive a switch command and send the switch command to the main control board 137, and the main control board 137 is further configured to control the motor 11, for example, to turn on or off the motor 11 according to the switch command.

In this embodiment, the adjusting member 151 and the gear plate 153 are connected by a rotation shaft 154 (see fig. 6), the adjusting member 151 is rotatable about the rotation shaft 154 relative to the gear plate 153, and one end of the adjusting member 151 is connected to the gear plate 153. It is understood that the rotation shaft 154 may be integrally formed with the adjustment member 151 or the gear plate 153, or may be independent of the adjustment member 151 and the gear plate 153, so long as the adjustment member 151 and the gear plate 153 can be rotatably connected. Referring to fig. 4 and 5, the other end of the adjusting member 151 is provided with a handle 155 for a user to operate, and the handle 155 has a plurality of rotation positions, and the rotation positions correspond to the gear positions one by one. It can be appreciated that the adjusting member 151 can also move linearly relative to the gear plate 153, so that the hall element 133 can sense the change of the magnetic field strength of the magnetic member 131, thereby realizing the speed adjustment of the motor 11.

Specifically, the handle 155 includes a rotating portion 1552 and an operating portion 1554, and the operating portion 1554 is located at one side of the rotating portion 1552. The operating portion 1554 is spaced from the rotating shaft 154 to form a moment arm, so that the rotating operation is easier.

In this embodiment, the adjusting member 151 includes a body portion 156 and a connecting portion 157, and one end of the connecting portion 157 in the axial direction of the rotation shaft 154 is connected to the body portion 156, and the other end is connected to the handle 155. Specifically, the rotating portion 1552 of the handle 155 is connected to the connecting portion 157.

Specifically, the body portion 156 is provided with two protrusions 1562 at one end thereof near the connecting portion 157 in the axial direction of the rotation shaft 154. More specifically, two protrusions 1562 are provided on the outer sidewall of the regulating member 151 and spaced apart in the outer sidewall circumferential direction, a slot is formed between the two protrusions 1562, and the magnetic member 131 is accommodated in the slot. More specifically, a recess 1564 is formed between one side of the protrusion 1562 and the outer sidewall of the body 156, and both ends of the magnetic member 131 are respectively inserted into the two recesses 1564. Specifically, the magnetic member 131 is in a strip arc shape, and the center of the magnetic member 131 is located on the axis of the rotating shaft 154. The magnetic member 131 is driven to swing when the adjusting member 151 is rotated.

Specifically, the outer sidewall of the end of the connecting portion 157 away from the main body 156 is provided with a protruding strip 1572. The inner side of the rotating portion 1552 of the handle 155 is engaged with the protruding strip 1572 on the connecting portion 157 to prevent the rotating portion 1552 and the connecting portion 157 from rotating relative to each other.

In this embodiment, referring to fig. 6, at least one accommodating groove is formed at an end of the adjusting member 151 connected to the gear plate 153, an elastic member (not shown) and a movable member 21 are disposed in each accommodating groove, the movable member 21 is abutted between the elastic member and the gear plate 153, and the handle 155 is rotated to move to any one of a plurality of rotational positions so that the movable member 21 is abutted to the gear position 1532. When the movable member 21 abuts against the gear position 1532, the compression length of the elastic member is D1; when the movable member 21 is not in abutment with the shift position 1532 and is in a moving state, the compression length of the elastic member is D2, and D1 is smaller than D2. Specifically, in this embodiment, two accommodating grooves are formed in the adjusting member 151, an elastic member and a movable member 21 are disposed in the two accommodating grooves, two gear positions 1532 corresponding to the two accommodating grooves are disposed on the gear plate 153, the distance from each accommodating groove to the rotation shaft 154 is different, the distance from the gear position 1532 on each row to the rotation shaft 154 is equal, the distances from the gear position 1532 on different rows to the rotation shaft 154 are different, and the two movable members 21 are staggered in the circumferential direction around the rotation shaft 154, and alternately clamped into the gear positions 1532 of different rows. It is understood that the number of the movable members 21 may be three or more, and the number of the shift positions 1532 may be three or more. It will be appreciated that, in order to enable the movable member 21 to firmly abut against the shift position 1532, when the movable member 21 abuts against the shift position 1532, the corresponding elastic member still has a pushing force on the movable member 21. By providing two or more rows of gear positions 1532, the two movable members 21 can alternatively abut against the gear positions 1532 of different rows, which can greatly save space, not only can ensure a large number of gears, but also can avoid overlarge rotation stroke of the adjusting member 151. In particular, in the present embodiment, the gear position 1532 may be a gear groove, and of course, the gear position 1532 may be other structures such as a pit or a protrusion, so long as the adjusting member 151 can feel that the gear position 1532 is reached when rotated. More specifically, the gear groove may be a waist-shaped groove, and the long axis of the waist-shaped hole is located in the radial direction of a circle centered on the rotation axis 154, which allows the movable member 21 a range of movement in the radial direction.

In particular, the elastic member may be a spring. The movable member 21 may be a ball. It will be appreciated that the resilient member may be another resilient member such as a rubber rod, as long as it provides a force that tends to move the movable member 21 toward the gear plate 153. The movable member 21 may also be a roller or a cone as long as it can abut the gear position 1532 and can be disengaged from the gear position 1532.

Specifically, the shift position 1532 is provided on the side end surface of the shift plate 153 facing the regulator 151. The end surfaces of the gear position and the end surfaces of the accommodating groove are substantially perpendicular to the rotation axis 154 of the adjusting member 151 relative to the gear plate 153. Thus, asymmetric lateral force which can not hinder the rotation is not generated during the rotation, and the rotation can be relatively smooth.

Specifically, a side of the gear plate 153 facing the adjustment member 151 is provided with a limiting protrusion 1534, and the two limiting protrusions 1534 are divided into two outer sides of the plurality of gear positions to limit rotation of the adjustment member 151, thereby defining a rotation angle range of the adjustment member 151.

When the speed is required to be regulated, the user rotates the handle 155 to drive the regulating member 151 to rotate, and then drives the magnetic member 131 to rotate, and simultaneously, one movable member 21 is separated from one gear position 1532 and is abutted on the end surface of the gear plate 153, and the other movable member 21 is abutted on the other gear position 1532, so that the user can obviously feel the position switching, and the gear feeling is increased. It will be appreciated that in the present embodiment, the gear plate 153 is fixed, and the adjusting member 151 is rotated, so that the adjusting member 151 can be fixed, and the gear plate 153 is operated, which is not limited herein.

In the power tool of the embodiment, on one hand, the magnetic piece and the Hall element can be utilized to realize stepless speed regulation, on the other hand, the elastic piece, the movable piece and the gear position are adopted to be matched, the gear feel can be increased in the speed regulation process, and the elastic floating mode is adopted in the speed regulation, so that the abrasion among the parts can be reduced, and the service life of a product is greatly prolonged.

It should be noted that, in the present specification, each embodiment is described in a progressive manner, and each embodiment is mainly described as different from other embodiments, and identical and similar parts between the embodiments are all enough to be referred to each other.

The foregoing is merely illustrative of the present utility model, and the present utility model is not limited thereto, and any changes or substitutions easily contemplated by those skilled in the art within the scope of the present utility model should be included in the present utility model. Accordingly, the scope of the utility model should be assessed as that of the appended claims.

Claims (10)

1. A power tool having a speed governor, comprising:

a motor;

a power control assembly that continuously controls the power of the motor so that the speed of the motor can be continuously varied;

a speed regulating device coupled to the power control assembly;

the speed regulating device is characterized by comprising an adjusting piece and a gear plate which are sequentially connected, wherein a plurality of gear positions are arranged on the gear plate, the adjusting piece can move to any one of the gear positions relative to the gear plate, and the power control assembly changes the speed of the motor according to the gear position where the adjusting piece is located.

2. The power tool of claim 1, wherein the power tool comprises a housing,

the adjusting piece with the gear plate passes through rotation axis connection, the adjusting piece can wind the axis of rotation for the gear plate is rotatory, the one end of adjusting piece with the gear plate is connected, the other end of adjusting piece is equipped with the handle that supplies the user to operate, the handle has a plurality of rotation positions, and is a plurality of rotation position with a plurality of gear position one-to-one.

3. The power tool of claim 2, wherein the power tool comprises a housing,

the adjusting piece with the one end that keeps off the gear board and be connected is equipped with at least one holding tank, every be equipped with an elastic component and a moving part in the holding tank, the moving part butt in between the elastic component with keep off the gear board, rotatory the handle makes it remove to any one of a plurality of rotation positions, so that the moving part with keep off the gear position butt.

4. The power tool of claim 3, wherein the power tool comprises a housing,

when two holding grooves are formed in the adjusting piece, one elastic piece and one movable piece are arranged in the two holding grooves, two rows of gear positions corresponding to the two holding grooves are arranged on the gear plate, the distance from each holding groove to the rotating shaft is unequal, the distance from the gear position on each row to the rotating shaft is equal, the distances from the gear positions on different rows to the rotating shaft are unequal, the distances from the gear positions on different rows to the rotating shaft are staggered in the circumferential direction taking the rotating shaft as the center of a circle, and the two movable pieces are alternately clamped into the gear positions on different rows.

5. The power tool of claim 3, wherein the power tool comprises a housing,

when the movable piece is abutted with the gear position, the compression length of the elastic piece is D1; when the movable piece is not in abutting connection with the gear position and is in a moving state, the compression length of the elastic piece is D2, and D1 is smaller than D2.

6. The power tool of claim 3, wherein the power tool comprises a housing,

the movable piece is a ball, a roller or a cone.

7. The power tool of claim 2, wherein the power tool comprises a housing,

the power control assembly comprises a magnetic part, a Hall element and a Hall plate, wherein the Hall element is connected to the Hall plate, the Hall element and the magnetic part are oppositely arranged in a clearance mode, the magnetic part is in a strip arc shape, and the circle center of the magnetic part is located on the rotating shaft.

8. The power tool of claim 7, wherein the power tool comprises a power tool housing,

the adjusting piece comprises a body part and a connecting part, one end of the connecting part along the axis direction of the rotating shaft is connected with the body part, the other end of the connecting part is connected with the handle, and two bulges are arranged at one end, close to the connecting part, of the body part along the axis direction of the rotating shaft.

9. The power tool of claim 8, wherein the power tool further comprises a power source,

the two protrusions are arranged on the outer side wall of the adjusting piece and are spaced apart along the circumferential direction of the outer side wall, a groove is formed between the two protrusions, and the magnetic piece is accommodated in the groove.

10. The power tool of claim 9, wherein the power tool comprises a power tool housing,

the Hall element is fixedly connected to the main shell of the power tool, the handle is rotated to enable the adjusting piece to move, the Hall element senses the magnetic field intensity change of the magnetic piece and converts the sensed magnetic field intensity change into an electric signal to be transmitted to the Hall plate, and then the speed of the motor is adjusted.