CN217666614U - Clutch and electric hammer thereof - Google Patents
Clutch and electric hammer thereof Download PDFInfo
- Publication number
- CN217666614U CN217666614U CN202221338589.2U CN202221338589U CN217666614U CN 217666614 U CN217666614 U CN 217666614U CN 202221338589 U CN202221338589 U CN 202221338589U CN 217666614 U CN217666614 U CN 217666614U
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- China
- Prior art keywords
- clutch
- sleeve
- disc
- clamping
- clutch sleeve
- Prior art date
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- 238000000034 method Methods 0.000 claims abstract description 3
- 230000005540 biological transmission Effects 0.000 claims description 22
- 238000004519 manufacturing process Methods 0.000 abstract description 4
- 230000017525 heat dissipation Effects 0.000 description 4
- 238000013016 damping Methods 0.000 description 3
- 238000005461 lubrication Methods 0.000 description 3
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 2
- 230000006378 damage Effects 0.000 description 2
- 239000000428 dust Substances 0.000 description 2
- 239000004519 grease Substances 0.000 description 2
- 230000033001 locomotion Effects 0.000 description 2
- 208000027418 Wounds and injury Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 239000011449 brick Substances 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 208000014674 injury Diseases 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000003754 machining Methods 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 239000004575 stone Substances 0.000 description 1
Images
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B25—HAND TOOLS; PORTABLE POWER-DRIVEN TOOLS; MANIPULATORS
- B25D—PERCUSSIVE TOOLS
- B25D16/00—Portable percussive machines with superimposed rotation, the rotational movement of the output shaft of a motor being modified to generate axial impacts on the tool bit
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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
- F16D—COUPLINGS FOR TRANSMITTING ROTATION; CLUTCHES; BRAKES
- F16D43/00—Automatic clutches
- F16D43/02—Automatic clutches actuated entirely mechanically
- F16D43/20—Automatic clutches actuated entirely mechanically controlled by torque, e.g. overload-release clutches, slip-clutches with means by which torque varies the clutching pressure
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Percussive Tools And Related Accessories (AREA)
Abstract
The utility model discloses a clutch and electric hammer thereof, wherein, the clutch includes: the clutch sleeve is provided with a first clamping part; the clutch disc is arranged in the clutch sleeve; the clamping element is arranged at the end part of the clutch sleeve; a biasing element disposed within the clutch sleeve; the clutch disc and the clutch sleeve are mutually buckled and rotated together or mutually tripped, when the clutch disc and the clutch sleeve are tripped, the biasing element is deformed, and the latch is separated from the groove, so that the clutch disc and the clutch sleeve are separated. The clutch of the utility model can be integrally installed, operated or disassembled without other parts; the number of parts in the corresponding electric hammer is reduced, so that the production and assembly processes of the clutch and the electric hammer are simplified, and the cost is reduced; the electric hammer is convenient to disassemble and assemble, the parts sliding relatively are reduced, and the connection is more stable.
Description
[ technical field ]
The utility model relates to an electric tool field, in particular to clutch and be used for drilling or the electric hammer of chisel hits on concrete, floor, brick wall and stone material.
[ background art ]
When the electric hammer works in a chiseling mode, the electric hammer often encounters a wall body with reinforcing steel bars, a drill bit rotating forward is clamped in the moment when encountering the reinforcing steel bars, an operator feels huge reverse torque of the electric hammer in the moment, and the operator at the moment is easily sprained by the electric hammer. In order to prevent the injury phenomenon, a clutch is mostly arranged in the conventional electric hammer, when a drill bit rotating forwards is stuck, the clutch enables the motor drive of the electric hammer to be separated from the drill bit movement, at the moment, the motor is in an idle running state, and an operator only feels small reverse torque of the electric hammer.
However, with the increase of components such as a clutch and the like, the number of parts in the electric hammer is correspondingly increased, and the production process of the electric hammer is more complex and higher in cost; the installation of the electric hammer is more complicated, and the condition of poor assembly is easy to occur; the number of parts sliding relatively increases, resulting in a decrease in reliability of the entire system of the electric hammer.
[ contents of utility model ]
In order to solve the problem, the utility model provides a modular clutch and electric hammer thereof.
In order to solve the technical problem, the utility model adopts the following technical scheme:
a clutch, comprising:
the clutch sleeve is provided with a first clamping part;
the clutch disc is arranged in the clutch sleeve and is provided with a second clamping part which is arranged corresponding to the first clamping part, one of the first clamping part and the second clamping part is provided with a plurality of clamping teeth, and the other clamping part is provided with a groove for accommodating the clamping teeth;
the clamping element is arranged at the end part of the clutch sleeve;
the biasing element is arranged in the clutch sleeve, and two ends of the biasing element respectively abut against the clutch disc and the clamping element;
the clutch disc and the clutch sleeve are mutually buckled and rotated together or mutually tripped, when the clutch disc and the clutch sleeve are tripped, the clutch disc extrudes the biasing element to enable the biasing element to deform, and the latch is disengaged from the groove to enable the clutch disc and the clutch sleeve to be clutched.
The further improvement scheme is as follows: the clutch sleeve and the clutch disc are respectively provided with a first spline groove for inputting torque to the clutch and a second spline groove for outputting torque through the clutch.
The further improvement scheme is as follows: clutch sleeve integrated into one piece is including end to end's transmission portion, connecting portion and support portion in proper order, first block portion set up in connecting portion. The further improvement scheme is as follows: the first spline groove is formed in the outer surface of the transmission part, the first clamping part is formed in the inner surface of the transmission part, and the clutch disc, the clamping element and the biasing element are located on the inner side of the supporting part.
The further improvement scheme is as follows: the first spline groove is arranged at one end of the transmission part, and the second spline groove is arranged at the inner ring of the clutch disc.
The further improvement scheme is as follows: the wall of the clutch sleeve is provided with a plurality of through holes, and the through holes are located in the supporting part.
The further improvement scheme is as follows: the opening direction of the through hole is opposite to the biasing element.
The further improvement scheme is as follows: the number of the through holes is four, and the through holes are evenly distributed along the periphery of the clutch sleeve.
The further improvement scheme is as follows: the biasing element is a spring and the retaining element is a snap spring.
An electric hammer comprising a clutch as claimed in any one of the preceding claims, including a housing containing a motor, an intermediate shaft driven by the motor, and an impact system and a rotation system driven by the intermediate shaft; the rotating system comprises a cylinder sleeve, a clutch sleeved on the cylinder sleeve and a gear meshed with the clutch.
Compared with the prior art the utility model discloses following beneficial effect has: the clutch of the utility model is provided with the clutch sleeve, the clutch sleeve is integrally manufactured, the clamping element, the clutch disc and the bias element are integrated with the clutch sleeve to form the clutch by being arranged in the clutch sleeve or fixed at the end part of the clutch sleeve, and the whole clutch can be installed, operated or disassembled without other parts; the number of parts in the corresponding electric hammer is reduced, so that the production and assembly processes of the clutch and the electric hammer are simplified, and the cost is reduced; the electric hammer is convenient to disassemble and assemble, the parts sliding relatively are reduced, and the connection is more stable.
[ description of the drawings ]
The following detailed description of the embodiments of the present invention is provided with reference to the accompanying drawings:
FIG. 1 is a perspective view of the clutch of the present invention;
fig. 2 is a cross-sectional view of the clutch of the present invention in an engaged state;
fig. 3 is a cross-sectional view of the clutch of the present invention in a disengaged state;
fig. 4 is a partial sectional view of the electric hammer of the present invention;
fig. 5 is a sectional view of the electric hammer.
The meaning of the reference symbols in the figures:
The first engaging portion 111 is engaged with the latch 112
Support 115 through hole 116
The second engaging portion 121 has a recess 122
Shim 131 biasing element 140
Casing 1 cylinder jacket 2
The impact hammer 5 impacts the connecting rod 6
Motor 7 chuck component 8
[ detailed description of the invention ]
The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. Words such as "upper," "lower," "front," "rear," and the like, which indicate orientation or positional relationships, are used solely to facilitate the description of the invention and to simplify the description, and do not indicate or imply that the referenced devices/elements must have a particular orientation or be constructed and operated in a particular orientation, and therefore should not be construed as limiting the invention.
Referring to fig. 1 to 3, a clutch 100 according to an embodiment of the present invention is shown, in which the clutch 100 includes a clutch sleeve 110, a clutch disc 120, a retaining member 130 and a biasing member 140. The clutch sleeve 110 is a hollow member manufactured integrally, wherein the clutch disc 120 and the biasing element 140 are disposed in the clutch sleeve 110, and the retaining element 130 is disposed at one end of the clutch sleeve 110 for retaining the biasing element 140. The retaining member 130, the clutch plate 120 and the biasing member 140 are integrally disposed with the clutch sleeve 110 to form the clutch 100 by being disposed in the clutch sleeve 110 or fixed at an end of the clutch sleeve 110, and the clutch 100 can be integrally mounted, operated or dismounted without other parts.
The clutch 100 can be applied to electric tools such as electric hammers and electric drills, and provides safety protection for overload of a transmission system of the electric tool. In the present embodiment, the clutch 100 is installed in the electric hammer and has a split engagement type structure using torque as an overload protection parameter, and specifically, the clutch sleeve 110 is provided with a first engaging portion 111, the clutch disk 120 is provided with a second engaging portion 121 provided corresponding to the first engaging portion 111, one of the first engaging portion 111 and the second engaging portion 121 is provided with a plurality of teeth 112, and the other is provided with a groove 122 for receiving the teeth 112. This embodiment employs six latches 112 and corresponding six recesses 122. Through the engagement of the groove 122 and the latch 112, corresponding to the engagement state of the clutch, the clutch disc 120 and the clutch sleeve 110 are mutually buckled, transmit torque and rotate together at the moment; when the input torque is too large, the groove 122 and the latch 112 are disengaged and are not engaged, and corresponding to the disengaged state of the clutch, the torque is not transmitted between the clutch sleeve 110 and the clutch disc 120 at the moment, so that the function of safe clutch is achieved. The biasing element 140 is an elastic member, and two ends of the biasing element are respectively pressed against the clutch disc 120 and the retaining element 130, wherein the retaining element 130 is fixed relatively. The biasing element 140 can adjust and maintain the torque threshold value of the clutch plate 120 and the second engaging portion 121 thereon relative to the torque threshold value of the clutch sleeve 110 and the first engaging portion 111 thereon, which are different from each other due to the different elastic restoring forces of the biasing element 140. Therefore, the clutch plate 120 and the clutch sleeve 110 can be mutually buckled and rotated together or mutually released, when the clutch plate 120 is released, the biasing element 140 is pressed by the clutch plate 120 to deform, the latch 112 is separated from the groove 122, so that the clutch plate 120 and the clutch sleeve 110 are separated and separated, and the transmission of the electric tool is interrupted, so that equipment and a user are protected.
In the present embodiment, the clutch sleeve 110 is provided with the first spline grooves 113 for inputting torque to the clutch 100, the clutch disk 120 is provided with the second spline grooves 123 for outputting torque via the clutch 100, and the input and output torque is the operating torque of the electric power tool transmitted via the clutch 100. Wherein the first spline grooves 113 are engageable with an attached torque input component, such as a gear and gearbox, and the second spline grooves 123 are engageable with an attached torque output component, such as a cylinder liner 2, such as by providing the second spline grooves 123 as internal splines, and the cylinder liner 2 is provided with external splines that are engaged.
In the present embodiment, the clutch sleeve 110 is integrally formed, and includes a transmission portion 114, a connecting portion 117 and a supporting portion 115 which are connected end to end in sequence, and the transmission portion 114, the connecting portion 117 and the supporting portion 115 are connected end to transmit torque to each other. The integrally formed clutch sleeve 110 facilitates design, manufacture, machining and assembly, and reduces relative friction pairs to improve the reliability of the clutch 100. The torque during operation is transmitted to the transmission portion 114 via the first spline grooves 113, transmitted to the support portion 115 via the connecting portion 117, and transmitted to the clutch plate 120 via the first engaging portion 111. The first engaging portion 111 is disposed on the connecting portion 117, the first spline groove 113 is disposed on the outer surface of the transmission portion 114, the first engaging portion 111 is disposed on the inner surface of the transmission portion 114, and the clutch plate 120 is disposed inside the supporting portion 115.
The clutch plate 120, the retaining member 130 and the biasing member 140 are pre-installed in the clutch sleeve 110 to facilitate the overall disassembly and assembly of the clutch 100. In the present embodiment, the clutch disc 120, the retaining member 130 and the biasing member 140 are located inside the supporting portion 115, and the projections of the clutch disc 120, the retaining member 130 and the biasing member 140 to the direction perpendicular to the axis away from the clutch sleeve 110 are all on the inner side wall surface of the clutch sleeve 110. Specifically, the retaining member 130 is located inside the end of the supporting portion 115, the clutch plate 120 can be located inside the end of the supporting portion 115, and the biasing member 140 is located inside the supporting portion 115 and between the retaining member 130 and the clutch plate 120.
In the present embodiment, the first spline groove 113 is provided at one end of the transmission part 114, the second spline groove 123 is provided at the inner ring of the clutch plate 120, the other end of the transmission part 114 is connected to the support part 115 via the connection part 117, and the connection part 117 is provided with the first engagement part 111. Specifically, the first engaging portion 111 may be formed by a plurality of teeth 112 protruding from the transmission portion 114 toward the supporting portion 115 or a plurality of grooves 122 recessed inward at the connecting portion along the axial direction of the clutch sleeve 110. Preferably, the wall surface of the clutch sleeve 110 at the connection portion between the transmission portion 114 and the support portion 115 is thickened to enhance the structural strength and prevent the clutch plate 120 and the clutch sleeve 110 from damaging the clutch sleeve 110 during engagement and disengagement.
The clutch 100 is in a relatively closed state during operation, and the interior of the clutch sleeve 110, such as the biasing member 140, the retaining and recess 122, and the like, requires lubrication and heat dissipation. In the present embodiment, the wall of the clutch sleeve 110 is provided with a plurality of through holes 116, so that grease can enter the inside of the clutch sleeve 110 for lubrication and heat dissipation. The through hole 116 is formed in the support portion 115, and is preferably disposed to open toward the biasing member 140, so that the through hole 116 is not easily blocked, and the biasing member 140 has better lubrication and heat dissipation effects. Further improvement scheme does, can set up through-hole 116 into four to evenly arrange along clutch sleeve 110 periphery, the grease is more unobstructed in, out clutch 100, and clutch 100 also can directly dispel the heat through-hole 116, and the heat dissipation is more even.
In this embodiment, the biasing element 140 is a spring, the retaining element 130 is a snap spring, and the snap spring is disposed around the inner wall of the clutch sleeve 110 to retain the spring. A gasket 131 can be arranged between the clamp spring and the spring, and the thickness of the gasket 131 can be used for adjusting the spring force value, so that the torque threshold value of the clutch 100 to be loosened is adjusted.
Referring to fig. 4 and 5, an embodiment of the present invention further relates to an electric hammer. The electric hammer comprises a machine shell 1, a chuck component 8 arranged in front of the machine shell 1 and a handle 9 arranged at the rear of the machine shell 1. A switch 10 for operating the electric hammer to start and stop, a shift lever 12 for adjusting the inward feeding or outward pulling of the electric hammer or the locking function of the switch 10 and a damping bracket 11 for damping are arranged at the handle 9. The housing 1 accommodates a motor 7, an intermediate shaft driven by the motor 7, and an impact system and a rotation system driven by the intermediate shaft. The chuck assembly 8 is used for clamping a drill bit, the motor 7 serves as a power source to provide power, the middle shaft transmits the power of the motor 7 to the impact system and the rotating system, the impact system and the rotating system transmit the impact power and the rotating power to the chuck assembly 8, and then the drill bit performs rotary impact output.
The rotating system comprises a cylinder sleeve 2 and the clutch 100 sleeved on the cylinder sleeve 2, wherein the clutch disc 120 is connected with the cylinder sleeve 2 through a second spline groove 123 in a spline connection mode, the clutch sleeve 110 can be connected with the output end of the motor through a transmission gear, a shaft or a gear box, and when the torque borne by the clutch disc 120 or the clutch sleeve 110 is too large, the clutch disc 120 or the clutch sleeve 110 can be loosened from each other, so that transmission of the rotating system is interrupted, and damage to equipment and personnel is prevented. The impact system comprises an oscillator 4, a cylinder 3, a hammer 5 and an impact link 6. 4 covers of oscillator are located on the jackshaft and have the pendulum rod that is used for the swing output, and cylinder 3 slides and sets up in cylinder jacket 2 and connect in the pendulum rod, and impact hammer 5 slides and sets up in cylinder 3, and impact connecting rod 6 slides and sets up in cylinder jacket 2, and oscillator 4 drives 3 reciprocating motion of cylinder to compressed air launches impact hammer 5, and impact hammer 5 strikes impact connecting rod 6, strikes connecting rod 6 and gives the impact force for the drill bit and assaults the output.
In the present embodiment, the electric hammer is a portable electric hammer to which a battery pack (not shown in the drawings) can be attached, and the battery pack can be attached to the bottom of the handle 9 via a battery pack attachment rail 13. The circuit board 14 for controlling the electric hammer to operate is arranged at the bottom of the machine shell 1 and is respectively electrically connected with the motor 7, the battery pack, the switch 10 and the like. The electric hammer can also be externally connected with accessories such as a dust suction device, and the like, wherein a dust suction port can be arranged in front of the machine shell 1, and an external power supply and signal source interface can be connected with the circuit board 14 in a plugging way at the bottom of the machine shell 1.
The present invention is not limited to the above embodiments, and the scope of the present invention is defined by the claims.
Claims (10)
1. A clutch, characterized in that: the method comprises the following steps:
the clutch sleeve is provided with a first clamping part;
the clutch disc is arranged in the clutch sleeve and is provided with a second clamping part which is arranged corresponding to the first clamping part, one of the first clamping part and the second clamping part is provided with a plurality of clamping teeth, and the other clamping part is provided with a groove for accommodating the clamping teeth;
the clamping element is arranged at the end part of the clutch sleeve;
the biasing element is arranged in the clutch sleeve, and two ends of the biasing element respectively abut against the clutch disc and the clamping element;
the clutch disc and the clutch sleeve are mutually buckled and rotated together or mutually tripped, when the clutch disc and the clutch sleeve are tripped, the clutch disc extrudes the biasing element to enable the biasing element to deform, and the latch is disengaged from the groove to enable the clutch disc and the clutch sleeve to be clutched.
2. The clutch of claim 1, wherein: the clutch sleeve and the clutch disc are respectively provided with a first spline groove for inputting torque to the clutch and a second spline groove for outputting torque through the clutch.
3. The clutch of claim 2, wherein: clutch sleeve integrated into one piece is including end to end's transmission portion, connecting portion and support portion in proper order, first block portion set up in connecting portion.
4. The clutch of claim 3, wherein: the first spline groove is formed in the outer surface of the transmission part, the first clamping part is formed in the inner surface of the transmission part, and the clutch disc, the clamping element and the biasing element are located on the inner side of the supporting part.
5. The clutch of claim 3, wherein: the first spline groove is arranged at one end of the transmission part, and the second spline groove is arranged at the inner ring of the clutch disc.
6. The clutch of claim 4, wherein: the wall of the clutch sleeve is provided with a plurality of through holes, and the through holes are located in the supporting part.
7. The clutch of claim 6, wherein: the opening direction of the through hole is opposite to the biasing element.
8. The clutch of claim 6, wherein: the number of the through holes is four, and the through holes are evenly distributed along the periphery of the clutch sleeve.
9. The clutch of claim 1, wherein: the biasing element is a spring and the retaining element is a snap spring.
10. An electric hammer comprising a clutch according to any one of claims 1-9, wherein: the impact mechanism comprises a machine shell, wherein a motor, an intermediate shaft driven by the motor, and an impact system and a rotating system driven by the intermediate shaft are accommodated in the machine shell; the rotating system comprises a cylinder sleeve, a clutch sleeved on the cylinder sleeve and a gear meshed with the clutch.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221338589.2U CN217666614U (en) | 2022-05-31 | 2022-05-31 | Clutch and electric hammer thereof |
| PCT/CN2023/092879 WO2023231715A1 (en) | 2022-05-31 | 2023-05-09 | Clutch and electric hammer thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221338589.2U CN217666614U (en) | 2022-05-31 | 2022-05-31 | Clutch and electric hammer thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217666614U true CN217666614U (en) | 2022-10-28 |
Family
ID=83703804
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202221338589.2U Active CN217666614U (en) | 2022-05-31 | 2022-05-31 | Clutch and electric hammer thereof |
Country Status (2)
| Country | Link |
|---|---|
| CN (1) | CN217666614U (en) |
| WO (1) | WO2023231715A1 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023231715A1 (en) * | 2022-05-31 | 2023-12-07 | 江苏东成工具科技有限公司 | Clutch and electric hammer thereof |
Family Cites Families (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107344349B (en) * | 2016-05-06 | 2022-04-08 | 博世电动工具（中国）有限公司 | Electric tool |
| CN206899162U (en) * | 2017-06-28 | 2018-01-19 | 武义华丽电器制造有限公司 | A kind of electric hammer clutch |
| CN214025536U (en) * | 2020-10-30 | 2021-08-24 | 江苏东成工具科技有限公司 | Electric hammer |
| CN213971015U (en) * | 2020-11-10 | 2021-08-17 | 浙江金可曼电器有限公司 | Electric hammer cylinder component |
| CN213899669U (en) * | 2020-11-17 | 2021-08-06 | 浙江铭坤工具制造有限公司 | Safety clutch structure |
| CN214560598U (en) * | 2020-12-30 | 2021-11-02 | 江苏东成工具科技有限公司 | Electric hammer torque adjusting device |
| CN217666614U (en) * | 2022-05-31 | 2022-10-28 | 江苏东成工具科技有限公司 | Clutch and electric hammer thereof |
-
2022
- 2022-05-31 CN CN202221338589.2U patent/CN217666614U/en active Active
-
2023
- 2023-05-09 WO PCT/CN2023/092879 patent/WO2023231715A1/en unknown
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023231715A1 (en) * | 2022-05-31 | 2023-12-07 | 江苏东成工具科技有限公司 | Clutch and electric hammer thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| WO2023231715A1 (en) | 2023-12-07 |
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