CN115045995A - Gear adjusting device and adjusting method thereof - Google Patents
Gear adjusting device and adjusting method thereof Download PDFInfo
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- CN115045995A CN115045995A CN202210593488.8A CN202210593488A CN115045995A CN 115045995 A CN115045995 A CN 115045995A CN 202210593488 A CN202210593488 A CN 202210593488A CN 115045995 A CN115045995 A CN 115045995A
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- shifting fork
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- 238000000034 method Methods 0.000 title claims abstract description 11
- 238000013459 approach Methods 0.000 claims description 12
- 238000005553 drilling Methods 0.000 claims description 6
- 238000001125 extrusion Methods 0.000 claims description 4
- 230000005540 biological transmission Effects 0.000 claims description 3
- 238000007792 addition Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 230000006835 compression Effects 0.000 description 1
- 238000007906 compression Methods 0.000 description 1
- 238000005034 decoration Methods 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H59/00—Control inputs to control units of change-speed-, or reversing-gearings for conveying rotary motion
- F16H59/02—Selector apparatus
- F16H59/08—Range selector apparatus
- F16H59/12—Range selector apparatus comprising push button devices
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D17/00—Details of, or accessories for, portable power-driven percussive tools
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16H—GEARING
- F16H63/00—Control outputs from the control unit to change-speed- or reversing-gearings for conveying rotary motion or to other devices than the final output mechanism
- F16H63/02—Final output mechanisms therefor; Actuating means for the final output mechanisms
- F16H63/30—Constructional features of the final output mechanisms
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- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Mechanical Operated Clutches (AREA)
- Gear Transmission (AREA)
Abstract
The invention discloses a gear adjusting device and an adjusting method thereof, and the gear adjusting device comprises a knob, a limiting piece, an elastic piece, a clutch and a fixed shaft arranged in a shell, wherein the clutch is arranged on a motor output shaft; the first shifting fork and the second shifting fork are arranged side by side at intervals, a first notch for accommodating the clutch and the limiting piece is formed between the first shifting fork and the second shifting fork, a second notch for accommodating the elastic piece is arranged at a position back to the first notch, and the limiting piece pushes the shifting fork assembly to move and drives the clutch to move along the output shaft of the motor; according to the invention, the pushing clutch shifting fork assembly is arranged below the knob, and flexible gear shifting of the clutch is realized through a single elastic piece, so that the gear shifting is smooth and reliable.
Description
Technical Field
The invention belongs to the field of electric tools, and particularly relates to a gear adjusting device and a gear adjusting method.
Background
In building decoration and related industries, an electric hammer is usually used for operation; the common electric hammer is generally provided with a hammer gear, a drill gear and a hammer drill gear, and an operator can switch between the gears, so that the electric hammer is very convenient to use. Due to the need for frequent work, flexible and smooth shifting is essential. The common electric hammer has more parts of a gear shifting device, the mutual matching is complex, and the gear shifting process is easy to have the phenomenon of blocking; meanwhile, the conventional gear shifting device has a complex structure, and a plurality of elastic elements are arranged in the gear shifting device to push the clutch, so that the gear shifting is labor-consuming. Therefore, it is necessary to design a reliable and flexible gear adjusting device and an adjusting method thereof.
Disclosure of Invention
The invention aims at the problems in the prior art and designs a gear adjusting device.A pushing clutch shifting fork assembly is arranged below a knob, and flexible gear shifting of a clutch is realized through a single elastic piece.
The invention aims to be realized by the following technical scheme: a gear adjusting device comprises a knob, a limiting piece, an elastic piece, a clutch and a fixed shaft arranged in a shell, wherein the knob and the limiting piece are respectively arranged on the inner side and the outer side of the shell and synchronously rotate relative to the shell; the clutch is sleeved on the motor output shaft, a shifting fork assembly used for pushing the clutch to move along the motor output shaft is arranged between the limiting piece and the clutch, the shifting fork assembly comprises a first shifting fork and a second shifting fork, the first shifting fork and the second shifting fork are sleeved on a fixed shaft, an elastic piece is arranged between the first shifting fork and the second shifting fork, and the elastic piece is sleeved on the fixed shaft and simultaneously in extrusion contact with the first shifting fork and the second shifting fork; the first shifting fork and the second shifting fork are arranged side by side at intervals, a first notch used for accommodating the clutch and the limiting part is formed between the first shifting fork and the second shifting fork, a second notch used for accommodating the elastic part is arranged at the position back to the first notch, and the limiting part pushes the shifting fork assembly to move and drives the clutch to move along the output shaft of the motor.
Preferably, a spline housing which is fixedly connected with the motor output shaft and synchronously rotates with the motor output shaft is arranged in the middle of the motor output shaft, a swing rod bearing and a rotary gear assembly are respectively arranged on two adjacent sides of the spline housing, and the swing rod bearing and the rotary gear assembly are sleeved on the motor output shaft; spline teeth are respectively arranged on the spline housing, the swing rod bearing and the rotating gear assembly, and the spline teeth are also arranged on the inner wall of the clutch and are respectively meshed with the spline housing, the swing rod bearing and the spline teeth on the rotating gear assembly; the clutch moves along the output shaft of the motor, simultaneously, the spline teeth on the clutch are always meshed with the spline teeth on the spline housing, and the spline housing rotates and simultaneously drives the clutch to rotate.
The clutch drives the swing rod bearing and the rotating gear component to rotate in the process of moving along the output shaft of the motor, so that the gear is switched to a corresponding working state.
Preferably, the first shifting fork is respectively provided with a first abutting part and a second abutting part which are parallel to each other, and the first abutting part and the second abutting part are sleeved on the fixed shaft; the second shifting fork is respectively provided with a third abutting part and a fourth abutting part which are parallel to each other, and the third abutting part and the fourth abutting part are sleeved on the fixed shaft; the second abutting portion and the fourth abutting portion are arranged at intervals, a first gap used for accommodating the clutch and the limiting piece is formed between the second abutting portion and the fourth abutting portion, and a second gap used for accommodating the elastic piece is formed between the second abutting portion and the third abutting portion.
The clutch and the limiting piece are clamped between the second abutting part and the fourth abutting part, and when the limiting piece rotates, the clutch piece is synchronously pushed to move along the output shaft of the motor. The elastic piece is arranged between the second abutting portion and the third abutting portion, and therefore the first shifting fork and the second shifting fork can move towards the same direction under the effect of elastic force of the elastic piece.
Preferably, the clutch is provided with a clutch projection, the second abutting part and the fourth abutting part are respectively arranged on two sides of the clutch projection, and the clutch projection is clamped between the second abutting part and the fourth abutting part; the end face, facing the clutch, of the limiting part is provided with an eccentric bulge, and the eccentric bulge is clamped between the second abutting portion and the fourth abutting portion.
The clutch bulge is arranged between the second abutting part and the fourth abutting part, so that the clutch can be conveniently pushed by the first shifting fork and the second shifting fork; an eccentric bulge is arranged below the limiting part, so that the first shifting fork or the second shifting fork can be pushed by the eccentric bulge when the limiting part rotates.
Preferably, the second abutting portion is close to a first arc-shaped notch which is arranged on the side face of the clutch and matched with the appearance of the clutch, the fourth abutting portion is close to a second arc-shaped notch which is arranged on the side face of the clutch and matched with the appearance of the clutch, and the first arc-shaped notch and the second arc-shaped notch are coaxially arranged.
The clutch sets up in first arc breach and second arc breach, can not produce with first shift fork and second shift fork when clutch and motor output shaft synchronous revolution like this and interfere.
Preferably, the first end of the elastic member abuts against an end face of the second abutting portion, the second end of the elastic member abuts against an end face of the third abutting portion, the elastic member is always in a compressed state, and the first abutting portion and the third abutting portion are always in a mutually-abutted state when the clutch moves to the corresponding gear.
When the elastic piece is always in a compression state, the elastic piece can simultaneously generate extrusion elastic force on the first shifting fork and the second shifting fork, so that the second abutting part and the fourth abutting part can extrude two end faces of the clutch protrusions to be in contact with each other and the clutch can be maintained on the corresponding gear.
Preferably, the shell is further provided with a locking piece, the locking piece is provided with an elastic bulge facing the knob, and the knob is provided with a plurality of concave parts which are matched with the elastic bulge to limit the rotation of the knob.
When the knob rotates different gears, the elastic bulge on the locking piece can be clamped on the concave part corresponding to the gear, so that the knob is not easy to rotate at the corresponding gear, the knob is maintained at the corresponding gear, and the knob can be rotated only by applying external force to the knob.
Preferably, the side surface of the rotating gear assembly is also provided with a first gear which is meshed with the rotating gear assembly and is used for transmission, and a limiting part which is used for locking the rotation of the first gear is arranged at a position, close to the first gear, of the first shifting fork; the first shifting fork reciprocates along the fixed shaft, and the limiting part is close to or far away from the first gear.
The limiting part is arranged on the first shifting fork and cannot rotate, and when the limiting part is meshed with the first gear, the first gear cannot rotate; when the limiting part is separated from the first gear, the first gear and the rotating gear assembly rotate synchronously.
Preferably, the clutch moves in the axial direction of the output shaft of the motor while the knob rotates, and the knob corresponds to four gears when rotating to a first position, a second position, a third position and a fourth position respectively; when the knob rotates to a first position, spline teeth on the clutch are meshed with spline teeth on the rotary gear assembly, the spline sleeve drives the rotary gear assembly to synchronously rotate, the rotary gear assembly drives the first gear to rotate while rotating, and the first position is a drilling gear; when the knob rotates to a second position, the clutch is simultaneously meshed with spline teeth on the rotating gear assembly and the swing rod bearing, the spline sleeve synchronously drives the rotating gear assembly and the swing rod bearing to rotate, and the second position is a hammer drill stop; when the knob rotates to a third position, spline teeth on the clutch are meshed with spline teeth on the swing rod bearing, the spline sleeve and the swing rod bearing are linked with each other, a limiting part on the first shifting fork is far away from the first gear, and the third position is a flat chisel angle adjusting gear; when the knob rotates to the fourth position, spline teeth on the clutch and spline teeth on the swing rod bearing are meshed with each other, the spline sleeve drives the swing rod bearing to rotate, and meanwhile the limiting portion on the first shifting fork limits the first gear to rotate, and the fourth position is a hammer stop.
When the knob is rotated to four different positions, the clutch is moved to four different positions, so that the knob can have four corresponding different gears; the clutch is only when fourth position hammer gear, spacing portion on the teeth of a cogwheel just can with first gear intermeshing, first gear is unable to rotate.
Another object of the present invention is to design a gear adjusting method, which realizes clutch shifting by a single elastic member, and makes gear shifting more flexible and smooth, and the gear shifting is convenient and reliable.
In order to solve the technical problem, the technical scheme of the invention is as follows:
s1, rotating the knob, wherein the knob drives the limiting piece to rotate synchronously, and when the knob rotates to any one gear, the locking piece on the shell can be clamped in the inner concave part of the knob to keep the knob fixed; when the knob is switched from one gear to any other gear, the eccentric bulge below the limiting piece can push the first shifting fork or the second shifting fork; an elastic part is arranged in a second gap between the first shifting fork and the second shifting fork, and when the limiting part pushes one shifting fork to move along the fixed shaft, the other shifting fork can be close to the shifting fork which moves firstly under the action of the elastic force of the elastic part; the clutch is clamped in the first gap between the first shifting fork and the second shifting fork, and the shifting fork assembly moves and pushes the clutch to move along the output shaft of the motor.
S2, when the knob pushes the clutch to move towards the rotating gear assembly, the eccentric bulge below the limiting piece pushes the second abutting part to disengage the clutch to approach the rotating gear assembly, the first abutting part and the third abutting part are mutually attached, the elastic piece is further compressed when the second abutting part approaches the rotating gear assembly, the third abutting part tends to approach the rotating gear assembly under the action of the elastic force of the elastic piece, and meanwhile, the fourth abutting part extrudes and contacts the clutch bulge on the clutch; when the spline teeth on the clutch and the spline teeth on the rotating gear assembly are meshed with each other, the fourth abutting part can push the clutch to approach the rotating gear assembly, and the gear shifting is completed; meanwhile, the gear on the rotary gear component is meshed with the first gear to rotate, so that the knob is positioned at the first position and is a drilling gear; similarly, when the knob is in the second position, the spline teeth on the clutch are meshed with the spline teeth on the rotating gear assembly and the swing rod bearing simultaneously, and the knob is in the hammer drill gear at the moment.
S3, when the hammer drill gear is switched to the hammer gear, the knob is often required to be adjusted to a flat chisel angle adjusting gear, at the moment, the limiting part on the first shifting fork is far away from the first gear, and then the first gear can rotate freely; after the flat chisel angle adjustment is completed, the knob is rotated to enable the clutch to be close to the swing rod bearing, the limiting portion on the first shifting fork is meshed with the first gear when the clutch is close to the swing rod bearing, the first gear cannot rotate, and the knob is located at the fourth position and is kept at the hammer stop.
Compared with the prior art, the invention has the following beneficial effects: according to the invention, the clutch is clamped by the first shifting fork and the second shifting fork on the shifting fork assembly and is pushed to move along the motor output shaft, the clutch can be switched among all gears while moving on the motor output shaft, and the structure is simple and reliable. An elastic part is arranged between the first shifting fork and the second shifting fork, the first shifting fork and the second shifting fork are used for pushing the clutch through the elastic force generated by the elastic part, so that the clutch can be pushed to the corresponding gear by the first shifting fork or the second shifting fork only in a meshing state, the gear shifting process is smooth, meanwhile, first notches for accommodating the clutch and the limiting part are arranged at the positions of the first shifting fork and the second shifting fork, which are opposite to the elastic part, and the clutch and the limiting part are clamped between the first shifting fork and the second shifting fork; therefore, the clutch can be pushed by only rotating the limiting piece and the first shifting fork or the second shifting fork, so that the clutch can move to the corresponding gear. Therefore, the gear shifting structure is simple, gear shifting is reliable, and gear shifting is flexible and smooth.
Drawings
FIG. 1 is a perspective view of the present invention mounted on a housing;
FIG. 2 is a perspective view of the concealed housing of the present invention;
FIG. 3 is an exploded view of the concealed housing of the present invention;
FIG. 4 is a perspective view of the present invention;
FIG. 5 is an exploded view of the present invention;
FIG. 6 is a perspective view of the knob and the position limiting member after assembly;
FIG. 7 is an internal structural view of various components on the output shaft of the motor;
FIG. 8 is a perspective view of the present invention in the hammer stop;
fig. 9 is a perspective view of the present invention in a flat chisel angle adjustment gear;
FIG. 10 is a perspective view of the present invention in the hammer drill rail;
FIG. 11 is a perspective view of the present invention in a drill rail.
The labels in the figure are: 1. a knob; 2. a limiting member; 201. an eccentric bulge; 3. an elastic member; 4. a clutch; 41. a clutch projection; 5. a fixed shaft; 6. an output shaft of the motor; 7. a fork assembly; 71. a first shift fork; 711. a first abutting portion; 712. a second abutting portion; 713. a first arc-shaped notch; 72. a second fork; 721. a third abutting portion; 722. a fourth abutting portion; 723. a second arc-shaped notch; 8. a first notch; 9. a spline housing; 10. a swing rod bearing; 11. a rotating gear assembly; 12. spline teeth; 13. a second notch; 14. a locking piece; 15. an elastic bulge; 16. an inner concave portion; 17. a first gear; 18. a limiting part; 19. a first position; 20. a second position; 21. a third position; 22. a fourth position.
Detailed Description
The invention will be further described with reference to examples of embodiments shown in the drawings to which:
as shown in fig. 1 to 11, the present embodiment discloses a gear adjusting device, which includes a knob 1, a limiting member 2, an elastic member 3, a clutch 4 and a fixing shaft 5 installed inside a housing, wherein the knob 1 and the limiting member 2 are respectively installed on the inner side and the outer side of the housing and synchronously rotate relative to the housing; the clutch 4 is installed on a motor output shaft 6, a shifting fork assembly 7 for pushing the clutch 4 to move along the motor output shaft 6 is arranged between the limiting piece 2 and the clutch 4, the shifting fork assembly 7 comprises a first shifting fork 71 and a second shifting fork 72, the first shifting fork 71 and the second shifting fork 72 are sleeved on a fixed shaft 5, an elastic piece 3 is arranged between the first shifting fork 71 and the second shifting fork 72, and the elastic piece 3 is sleeved on the fixed shaft 5 and simultaneously contacts with the first shifting fork 71 and the second shifting fork 72 in a pressing manner; the first shifting fork 71 and the second shifting fork 72 are arranged side by side at intervals, a first gap 8 for accommodating the clutch 4 and the limiting part 2 is formed between the first shifting fork 71 and the second shifting fork 72, a second gap 13 for accommodating the elastic part 3 is arranged at a position back to the first gap 8, and the limiting part 2 pushes the shifting fork assembly 7 to move and drives the clutch 4 to move along the motor output shaft 6.
A spline housing 9 which is fixedly connected with the motor output shaft 6 and synchronously rotates with the motor output shaft is arranged in the middle of the motor output shaft 6, a swing rod bearing 10 and a rotary gear assembly 11 are respectively arranged on two adjacent sides of the spline housing 9, and the swing rod bearing 10 and the rotary gear assembly 11 are sleeved on the motor output shaft 6; the spline housing 9, the swing rod bearing 10 and the rotating gear assembly 11 are respectively provided with spline teeth 12, the inner wall of the clutch 4 is also provided with the spline teeth 12 which are respectively meshed with the spline housing 9, the swing rod bearing 10 and the spline teeth 12 on the rotating gear assembly 11; the clutch 4 moves along the motor output shaft 6, simultaneously, the spline teeth 12 on the clutch 4 are always in a meshing state with the spline teeth 12 on the spline housing 9, and the spline housing 9 rotates to drive the clutch 4 to rotate. The clutch 4 drives the swing rod bearing 10 and the rotating gear assembly 11 to rotate during the movement along the motor output shaft 6, so that the gear is switched to the corresponding working state.
The first fork 71 is respectively provided with a first abutting part 711 and a second abutting part 712 which are parallel to each other, and the first abutting part 711 and the second abutting part 712 are sleeved on the fixed shaft 5; the second fork 72 is respectively provided with a third abutting part 721 and a fourth abutting part 722 which are parallel to each other, and the third abutting part 721 and the fourth abutting part 722 are sleeved on the fixed shaft 5; the second abutting portion 712 and the fourth abutting portion 722 are spaced apart from each other to form a first gap 8 for accommodating the clutch 4 and the limiting member 2, and the second abutting portion 712 and the third abutting portion 721 are spaced apart from each other to form a second gap 13 for accommodating the elastic member 3. The clutch 4 and the limiting member 2 are clamped between the second abutting portion 712 and the fourth abutting portion 722, and when the limiting member 2 rotates, the clutch member is synchronously pushed to move along the motor output shaft 6. The elastic member 3 is disposed between the second and third abutting portions 712 and 721 such that the first and second forks 71 and 72 are moved in the same direction by the elastic force of the elastic member 3. The clutch 4 is provided with a clutch projection 41, the second abutting part 712 and the fourth abutting part 722 are respectively arranged at two sides of the clutch projection 41, and the clutch projection 41 is clamped between the second abutting part 712 and the fourth abutting part 722; an end surface of the stopper 2 facing the clutch 4 is provided with an eccentric protrusion 201, and the eccentric protrusion 201 is sandwiched between the second abutting portion 712 and the fourth abutting portion 722. The clutch projection 41 is provided between the second and fourth abutments 712 and 722, which facilitates the first and second shift forks 71 and 72 to push the clutch 4; an eccentric protrusion 201 is arranged below the limiting member 2, so that the eccentric protrusion 201 pushes the first shifting fork 71 or the second shifting fork 72 when the limiting member 2 rotates. The second abutting portion 712 is provided with a first arc-shaped notch 713 which is matched with the shape of the clutch 4, is close to the side face of the clutch 4, the fourth abutting portion 722 is provided with a second arc-shaped notch 723 which is matched with the shape of the clutch 4, is close to the side face of the clutch 4, and the first arc-shaped notch 713 and the second arc-shaped notch 723 are coaxially arranged. The clutch 4 is disposed in the first arc-shaped notch 713 and the second arc-shaped notch 723 so that the clutch 4 does not interfere with the first fork 71 and the second fork 72 when rotating in synchronization with the motor output shaft 6.
The first end of the elastic member 3 abuts against the end face of the second abutting portion 712, the second end of the elastic member 3 abuts against the end face of the third abutting portion 721, the elastic member 3 is always in a compressed state, and the first abutting portion 711 and the third abutting portion 721 are always in a mutually abutting state when the clutch 4 moves to the corresponding shift position. When the elastic member 3 is always in a compressed state, the elastic member 3 simultaneously applies an extrusion elastic force to the first fork 71 and the second fork 72, so that the second abutting portion 712 and the fourth abutting portion 722 press and contact two end surfaces of the clutch protrusion 41 and maintain the clutch 4 at a corresponding gear. Still be equipped with locking plate 14 on the casing, be equipped with the elastic bulge 15 towards knob 1 on the locking plate 14, be equipped with a plurality of cooperation elastic bulge 15 on the knob 1 and restrict the interior concave part 16 that knob 1 rotated. When the knob 1 rotates to different gears, the elastic protrusions 15 on the locking pieces 14 are clamped on the concave parts 16 corresponding to the gears, so that the knob 1 is not easy to rotate at the corresponding gears, the knob 1 is maintained at the corresponding gears, and the knob 1 can be rotated only by applying external force to the knob 1.
A first gear 17 which is meshed with the rotary gear assembly 11 and used for transmission is further arranged on the side face of the rotary gear assembly, and a limiting part 18 used for locking the first gear 17 to rotate is arranged at the position, close to the first gear 17, of the first shifting fork 71; the first fork 71 reciprocates along the fixed shaft 5 while the stopper 18 is close to or away from the first gear 17. The limiting part 18 is arranged on the first shifting fork 71 and cannot rotate, and when the limiting part 18 is meshed with the first gear 17, the first gear 17 cannot rotate; when the position-limiting portion 18 and the first gear 17 are disengaged from each other, the first gear 17 rotates in synchronization with the rotation gear assembly 11. When the knob 1 rotates, the clutch 4 moves in the axial direction of the motor output shaft 6, and when the knob 1 rotates to a first position 19, a second position 20, a third position 21 and a fourth position 22, four gears are respectively corresponding to the rotation; when the knob 1 rotates to a first position 19, the spline teeth 12 on the clutch 4 are meshed with the spline teeth 12 on the rotating gear assembly 11, the spline sleeve 9 drives the rotating gear assembly 11 to synchronously rotate, the rotating gear assembly 11 drives the first gear 17 to rotate while rotating, and the first position 19 is a drilling gear; when the knob 1 rotates to a second position 20, the clutch 4 is simultaneously meshed with the spline teeth 12 on the rotating gear assembly 11 and the swing rod bearing 10, the spline sleeve 9 synchronously drives the rotating gear assembly 11 and the swing rod bearing 10 to rotate, and the second position 20 is a hammer drill gear; when the knob 1 rotates to a third position 21, the spline teeth 12 on the clutch 4 are meshed with the spline teeth 12 on the swing rod bearing 10, the spline sleeve 9 and the swing rod bearing 10 are linked with each other, the limiting part 18 on the first shifting fork 71 is far away from the first gear 17, and the third position 21 is a flat chisel angle adjusting gear; when the knob 1 rotates to the fourth position 22, the spline teeth 12 on the clutch 4 are meshed with the spline teeth 12 on the swing rod bearing 10, the spline sleeve 9 drives the swing rod bearing 10 to rotate, the limiting part 18 on the first shifting fork 71 limits the first gear 17 to rotate, and the fourth position 22 is a hammer stop. When the knob 1 is rotated to four different positions, the clutch 4 is moved to four different positions, so that the knob 1 has four corresponding different gears.
The specific working process of this embodiment is as follows:
the first step is as follows: the knob 1 is rotated, the limiting piece 2 is driven by the knob 1 to synchronously rotate, and when the knob 1 rotates to any one gear, the locking piece 14 on the shell can be clamped in the concave part 16 of the knob 1, so that the knob 1 is kept fixed and is always positioned on the gear; when the knob 1 is switched from one gear to any other gear, the eccentric protrusion 201 below the limiting piece 2 pushes the first shifting fork 71 or the second shifting fork 72; an elastic part 3 is arranged in a second gap 13 between the first shifting fork 71 and the second shifting fork 72, when the limiting part 2 pushes one shifting fork to move along the fixed shaft 5, the other shifting fork is close to the shifting fork which moves firstly under the action of the elastic force of the elastic part 3; the clutch 4 is held in the first gap 8 between the first fork 71 and the second fork 72, and the fork assembly 7 moves while pushing the clutch 4 to move along the motor output shaft 6.
The second step is that: when the knob 1 pushes the clutch 4 to move towards the rotating gear assembly 11, the eccentric protrusion 201 below the limiting member 2 pushes the second abutting portion 712 to disengage the clutch 4 to approach the rotating gear assembly 11, the first abutting portion 711 and the third abutting portion 721 are attached to each other, the second abutting portion 712 approaches the rotating gear assembly 11 and the elastic member 3 is further compressed, so that the third abutting portion 721 tends to approach the rotating gear assembly 11 under the action of the elastic force of the elastic member 3, the third abutting portion 721 and the fourth abutting portion 722 are both located on the second fork 72, and the fourth abutting portion 722 presses and contacts the clutch protrusion 41 on the clutch 4 under the action of the elastic force of the elastic member 3; when the spline teeth 12 on the clutch 4 and the spline teeth 12 on the rotating gear assembly 11 are engaged with each other, the fourth abutting portion 722 pushes the clutch 4 to approach the rotating gear assembly 11, and the gear shifting is completed; meanwhile, the gear on the rotating gear assembly 11 is meshed with the first gear 17 to rotate, so that the knob 1 is adjusted to be a drilling gear; similarly, when the knob 1 is in the second position 20, the spline teeth 12 on the clutch 4 are simultaneously meshed with the spline teeth 12 on the rotating gear assembly 11 and the swing rod bearing 10, and the spline housing 9 synchronously drives the rotating gear assembly 11 and the swing rod bearing 10 to rotate, so that the hammer drill bit is rotationally adjusted.
The third step: when the hammer gear needs to be switched to the hammer gear, the knob 1 is often required to be adjusted to a flat chisel angle adjusting gear to adjust the angle of the drill bit, and at the moment, the limiting part 18 on the first shifting fork 71 is far away from the first gear 17, so that the first gear 17 can rotate freely; after the flat chisel angle is adjusted, the knob 1 is rotated, the clutch 4 is close to the swing rod bearing 10, the limiting part 18 on the first shifting fork 71 is meshed with the first gear 17 when the clutch 4 is close to the swing rod bearing 10, the first gear 17 cannot rotate, and the knob 1 is adjusted to be a hammer gear.
The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications or additions may be made to the described embodiments or alternatives may be employed by those skilled in the art without departing from the spirit or ambit of the invention as defined in the appended claims.
Claims (10)
1. A gear adjusting device comprises a knob (1), a limiting piece (2), an elastic piece (3), a clutch (4) and a fixed shaft (5) arranged in a shell, and is characterized in that the knob (1) and the limiting piece (2) are respectively arranged on the inner side and the outer side of the shell and synchronously rotate relative to the shell; the clutch (4) is sleeved on a motor output shaft (6), a shifting fork assembly (7) used for pushing the clutch (4) to move along the motor output shaft (6) is arranged between the limiting piece (2) and the clutch (4), the shifting fork assembly (7) comprises a first shifting fork (71) and a second shifting fork (72), the first shifting fork (71) and the second shifting fork (72) are sleeved on a fixed shaft (5), an elastic piece (3) is arranged between the first shifting fork (71) and the second shifting fork (72), and the elastic piece (3) is sleeved on the fixed shaft (5) and simultaneously in extrusion contact with the first shifting fork (71) and the second shifting fork (72); the first shifting fork (71) and the second shifting fork (72) are arranged side by side at intervals, a first notch (8) used for accommodating the clutch (4) and the limiting piece (2) is formed between the first shifting fork and the second shifting fork, a second notch (13) used for accommodating the elastic piece (3) is arranged at the position back to the first notch (8), and the limiting piece (2) pushes the shifting fork assembly (7) to move and drives the clutch (4) to move along the motor output shaft (6).
2. A gear adjusting device according to claim 1, characterized in that a spline housing (9) is arranged at the middle position of the motor output shaft (6) and is fixedly connected with the motor output shaft and synchronously rotates with the motor output shaft, a swing rod bearing (10) and a rotating gear assembly (11) are respectively arranged at two adjacent sides of the spline housing (9), and the swing rod bearing (10) and the rotating gear assembly (11) are sleeved on the motor output shaft (6); spline teeth (12) are respectively arranged on the spline housing (9), the swing rod bearing (10) and the rotary gear assembly (11), and the spline teeth (12) are also arranged on the inner wall of the clutch (4) and are respectively meshed with the spline housing (9), the swing rod bearing (10) and the spline teeth (12) on the rotary gear assembly (11); while the clutch (4) moves along the motor output shaft (6), the spline teeth (12) on the clutch (4) are always meshed with the spline teeth (12) on the spline sleeve (9), and the spline sleeve (9) rotates and drives the clutch (4) to rotate.
3. A gear adjustment device according to claim 1, characterized in that the first fork (71) is provided with a first abutting portion (711) and a second abutting portion (712) which are parallel to each other, and the first abutting portion (711) and the second abutting portion (712) are sleeved on the fixed shaft (5); a third abutting part (721) and a fourth abutting part (722) which are parallel to each other are respectively arranged on the second shifting fork (72), and the third abutting part (721) and the fourth abutting part (722) are sleeved on the fixed shaft (5); the second abutting portion (712) and the fourth abutting portion (722) are arranged at intervals, a first gap (8) used for accommodating the clutch (4) and the limiting piece (2) is formed between the second abutting portion (712) and the fourth abutting portion, and a second gap (13) used for accommodating the elastic piece (3) is formed between the second abutting portion (712) and the third abutting portion (721).
4. A gear shift position adjusting device according to claim 3, wherein a clutch projection (41) is provided on the clutch (4), the second abutting portion (712) and the fourth abutting portion (722) are respectively provided on both sides of the clutch projection (41), and the clutch projection (41) is sandwiched between the second abutting portion (712) and the fourth abutting portion (722); an end face of the limiting piece (2) facing the clutch (4) is provided with an eccentric protrusion (201), and the eccentric protrusion (201) is clamped between the second abutting portion (712) and the fourth abutting portion (722).
5. A gear adjustment device according to claim 4, characterized in that the second abutting portion (712) is provided with a first arc-shaped notch (713) close to the side of the clutch (4) and matched with the shape of the clutch (4), the fourth abutting portion (722) is provided with a second arc-shaped notch (723) close to the side of the clutch (4) and matched with the shape of the clutch (4), and the first arc-shaped notch (713) and the second arc-shaped notch (723) are coaxially arranged.
6. A gear adjustment device according to claim 3, characterized in that the first end of the elastic member (3) abuts against the end face of the second abutment portion (712), the second end of the elastic member (3) abuts against the end face of the third abutment portion (721), the elastic member (3) is always in a compressed state, and the first abutment portion (711) and the third abutment portion (721) are always in a mutually abutting state when the clutch (4) is moved to the corresponding gear.
7. Gear adjustment device according to claim 1, characterized in that the housing is further provided with a locking tab (14), said locking tab (14) is provided with a resilient protrusion (15) facing the knob (1), said knob (1) is provided with a plurality of inner recesses (16) cooperating with the resilient protrusion (15) to limit the rotation of the knob (1).
8. A gear adjusting device according to claim 2, characterized in that the side of the rotating gear assembly (11) is further provided with a first gear (17) which is engaged with the rotating gear assembly and used for transmission, and a position of the first shifting fork (71) close to the first gear (17) is provided with a limiting part (18) used for locking the rotation of the first gear (17); the first shifting fork (71) moves back and forth along the fixed shaft (5) and the limiting part (18) is close to or far away from the first gear (17).
9. Gear adjustment device according to claim 8, characterized in that the clutch (4) is moved in the axial direction of the motor output shaft (6) while the knob (1) is rotated, and the knob (1) is rotated to a first position (19), a second position (20), a third position (21) and a fourth position (22) corresponding to four gears, respectively; when the knob (1) rotates to a first position (19), spline teeth (12) on the clutch (4) are meshed with spline teeth (12) on the rotary gear assembly (11), the spline sleeve (9) drives the rotary gear assembly (11) to synchronously rotate, the rotary gear assembly (11) drives the first gear (17) to rotate while rotating, and the first position (19) is a drilling gear; when the knob (1) rotates to a second position (20), the clutch (4) is simultaneously meshed with the spline teeth (12) on the rotating gear assembly (11) and the swing rod bearing (10), the spline sleeve (9) synchronously drives the rotating gear assembly (11) and the swing rod bearing (10) to rotate, and the second position (20) is a hammer drill gear; when the knob (1) rotates to a third position (21), spline teeth (12) on the clutch (4) are meshed with spline teeth (12) on the swing rod bearing (10), the spline sleeve (9) and the swing rod bearing (10) are mutually linked, a limiting part (18) on the first shifting fork (71) is far away from the first gear (17), and the third position (21) is a flat chisel angle adjusting gear; when knob (1) rotated fourth position (22) spline tooth (12) on clutch (4) and spline tooth (12) intermeshing on swing rod bearing (10), spacing portion (18) on first shift fork (71) restriction first gear (17) rotated when spline housing (9) drove swing rod bearing (10) pivoted, fourth position (22) are hammer shelves.
10. A gear shift position adjusting method that employs the gear shift position adjusting apparatus according to any one of claims 1 to 9, characterized by comprising the steps of:
s1, rotating the knob (1), wherein the knob (1) drives the limiting piece (2) to rotate synchronously, and when the knob (1) rotates to any gear, the locking piece (14) on the shell can be clamped to the inner concave part (16) of the knob (1) to keep the knob (1) fixed; when the knob (1) is switched from one gear to any other gear, the eccentric bulge (201) below the limiting piece (2) pushes the first shifting fork (71) or the second shifting fork (72); an elastic part (3) is arranged in a second gap (13) between the first shifting fork (71) and the second shifting fork (72), and when the limiting part (2) pushes one shifting fork to move along the fixed shaft (5), the other shifting fork is close to the shifting fork which moves firstly under the action of the elastic force of the elastic part (3); the clutch (4) is clamped in a first gap (8) between a first shifting fork (71) and a second shifting fork (72), and the shifting fork assembly (7) moves and pushes the clutch (4) to move along the motor output shaft (6);
s2, when the knob (1) pushes the clutch (4) to move towards the rotating gear assembly (11), the eccentric bulge (201) below the limiting piece (2) pushes the second abutting part (712) to disengage the clutch (4) to approach the rotating gear assembly (11), the first abutting part (711) and the third abutting part (721) are attached to each other, the elastic piece (3) is further compressed when the second abutting part (712) approaches the rotating gear assembly (11), the third abutting part (721) tends to approach the rotating gear assembly (11) under the action of the elastic force of the elastic piece (3), and the fourth abutting part (722) can press and contact the clutch bulge (41) on the clutch (4); when the spline teeth (12) on the clutch (4) are meshed with the spline teeth (12) on the rotating gear assembly (11), the fourth abutting part (722) pushes the clutch (4) to approach the rotating gear assembly (11), and the gear shifting is completed; meanwhile, a gear on the rotating gear assembly (11) is meshed with the first gear (17) to rotate, so that the drilling gear is formed when the knob (1) is located at the first position (19); similarly, when the knob (1) is located at the second position (20), the spline teeth (12) on the clutch (4) are meshed with the spline teeth (12) on the rotating gear assembly (11) and the swing rod bearing (10) at the same time, and the knob (1) is located at the hammer drill gear;
s3, when the hammer gear is switched to the hammer gear, the knob (1) is often required to be adjusted to a flat chisel angle adjusting gear, at the moment, the limiting part (18) on the first shifting fork (71) is far away from the first gear (17), and then the first gear (17) can be rotated freely; after the flat chisel angle is adjusted, the knob (1) is rotated, the clutch (4) is close to the swing rod bearing (10), the limiting part (18) on the first shifting fork (71) is meshed with the first gear (17) when the clutch (4) is close to the swing rod bearing (10), the first gear cannot rotate, and the knob (1) is located at the fourth position (22) and is kept at the hammer stop.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210593488.8A CN115045995A (en) | 2022-05-27 | 2022-05-27 | Gear adjusting device and adjusting method thereof |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210593488.8A CN115045995A (en) | 2022-05-27 | 2022-05-27 | Gear adjusting device and adjusting method thereof |
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| CN115045995A true CN115045995A (en) | 2022-09-13 |
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| CN202210593488.8A Pending CN115045995A (en) | 2022-05-27 | 2022-05-27 | Gear adjusting device and adjusting method thereof |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115199739A (en) * | 2022-05-27 | 2022-10-18 | 浙江东立电器有限公司 | Gear adjusting device |
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| CN205588245U (en) * | 2016-04-07 | 2016-09-21 | 浙江德世电器有限公司 | Electric hammer rotates clutch's secondary limit structure |
| CN115199739A (en) * | 2022-05-27 | 2022-10-18 | 浙江东立电器有限公司 | Gear adjusting device |
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2022
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| JPH09272005A (en) * | 1996-02-09 | 1997-10-21 | Ryobi Ltd | Operation switching mechanism for rotary tool |
| CN101312807A (en) * | 2005-11-25 | 2008-11-26 | 罗伯特·博世有限公司 | Hammer drill having three operating modes |
| US20090129876A1 (en) * | 2007-11-21 | 2009-05-21 | Black & Decker Inc. | Multi-speed drill and transmission with low gear only clutch |
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| CN115199739A (en) * | 2022-05-27 | 2022-10-18 | 浙江东立电器有限公司 | Gear adjusting device |
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