CN208246735U - Electric hammer releasing structure - Google Patents
Electric hammer releasing structure Download PDFInfo
- Publication number
- CN208246735U CN208246735U CN201820318228.9U CN201820318228U CN208246735U CN 208246735 U CN208246735 U CN 208246735U CN 201820318228 U CN201820318228 U CN 201820318228U CN 208246735 U CN208246735 U CN 208246735U
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- China
- Prior art keywords
- pressing plate
- jackshaft
- tripping
- washer
- pressure spring
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Abstract
The claimed electric hammer releasing structure of the utility model, including jackshaft, bevel gear, transmission gear, tripping pressing plate and washer on jackshaft；The bevel gear and the tripping pressing plate are fixedly connected on the circumferencial direction of the jackshaft with the jackshaft；The tripping pressing plate is slidably connected in the axial direction of the jackshaft with the jackshaft；The transmission gear and the jackshaft are rotatablely connected；It is provided at least one pressure spring between the tripping pressing plate and the washer, for pressure needed for providing tripping pressing plate tripping.After prolonged use, in the case where thread off pressing plate track and worn steel ball, the change in torque that pressure spring is supplied to tripping pressing plate is little, and then effectively extends the service life of the releasing structure for the utility model.
Description
Technical field
The utility model belongs to the relevant technical field of electric hammer, more particularly to a kind of electric hammer releasing structure.
Background technique
Electric hammer is a kind of electrodynamic type rotation hammer drill with overload-release clutch with Pneumatic hammering mechanism.It is by motor, tooth
Wheel decelerator, beater mechanism, drilling mechanism, the composition such as overload clutch protective device, electric hammer generally there are two types of functional mode,
One is the conflicting model of output linear reciprocal movement (hammer modes), and another kind is the drill jig formula for exporting rotary motion.Certainly, electric
Hammer can also realize existing impact, and have the hammer drill mode of rotation.
It is appreciated that during use, the operating condition mutation of electric hammer can make due to the unstability of use environment
At electric hammer overload or stall, transmission parts can be damaged when serious, or even burn motor, in addition, reaction force when electric hammer stall
Also easily hurt sb.'s feelings；Electric hammer trip gear mostly uses transmission gear to drive tripping fixed plate to rotate by steel ball at present, then by
Tripping fixed plate is rotated by this with mantle tooth come in a manner of driving drill bit to be worked, so that when electric hammer overload, it can be from biography
The steel ball press tripping fixed plate compression tripping inner spring and tripping outer spring that moving gear squeezes out move down, and are passed with this to play
The moving gear effect isolated with tripping fixed plate tripping.
From the foregoing, it will be observed that above-mentioned tripping device for overload protection of electric hammer can efficiently solve electric hammer work when overload or
It threads off in the case of stall.However realized using the disc spring of pairing installation and effect is compressed to tripping fixed plate, wherein disc spring
Pressure influence corresponding to the slight change of compression travel be it is very big, in this way when tripping fixed plate track and worn steel ball it
Afterwards, the corresponding pressure provided of disc spring becomes smaller, so that the torque of tripping fixed plate tripping becomes smaller, to can cause the electric hammer complete machine
While punching, the service life of tripping is also affected, is not well positioned to meet people to its use demand.
Utility model content
Based on this, it is necessary to for the technical problems in the prior art, provide a kind of electric hammer releasing structure.
Specifically, a kind of electric hammer releasing structure, including jackshaft, set on the bevel gear of jackshaft, transmission gear, tripping pressure
Plate and washer；The bevel gear and the tripping pressing plate are fixed with the jackshaft and are connected in the circumferencial direction of the jackshaft
It connects；The tripping pressing plate is slidably connected in the axial direction of the jackshaft with the jackshaft；The transmission gear and it is described in
Between axis be rotatablely connected；It is characterized by: it is provided at least one pressure spring between the tripping pressing plate and the washer, it is de- with providing
Withhold pressure required when plate tripping.
As a preferred embodiment of the present invention, a pressure spring, institute are provided between the tripping pressing plate and the washer
It states pressure spring and is socketed in the jackshaft.
As a preferred embodiment of the present invention, the tripping pressing plate is protruding in the side away from the transmission gear
There are a sleeve part, and the set when the pressure spring and the tripping pressing plate and the washer contact, on the tripping pressing plate
Canister portion is extended downwardly into pressure spring.
As a preferred embodiment of the present invention, multiple pressure springs, institute are provided between the tripping pressing plate and the washer
State the periphery that the jackshaft is arranged in multiple pressure springs in a manner of annular array.
As a preferred embodiment of the present invention, wherein the both side ends of each pressure spring and the tripping pressing plate and the pad
It limits and fixes between circle.
As a preferred embodiment of the present invention, 2 are provided between the tripping pressing plate and the washer with compression spring.
As a preferred embodiment of the present invention, the washer offers a cone on the side end face towards jackshaft
Hole, and a retainer ring being inlaid on the jackshaft is provided in the taper hole of the washer, and the retainer ring is supported with the washer
Connect cooperation.
As a preferred embodiment of the present invention, the pressure spring is set as cylindrical pressure spring or taper pressure spring.
As a preferred embodiment of the present invention, multiple steel ball mounting holes are offered on the flank of tooth of the transmission gear, and
A steel ball is correspondingly arranged in each steel ball mounting hole, and the upper and lower ends of the self-corresponding steel ball mounting hole of each steel ball are outside
It stretching out, the steel ball extends downwardly the steel-ball groove that offers on the part and the tripping pressing plate of steel ball mounting hole and contacts,
The part for stretching out steel ball mounting hole upwards carries out gland with the top board being socketed on jackshaft.
Due to the application of the above technical scheme, the utility model has the advantage that compared with prior art
Electric hammer releasing structure provided by the utility model substitutes disc spring in the prior art with pressure spring to provide tripping
Pressing plate presses against the pressure on transmission gear, compared with prior art, provided pressure after the slight change of the compressed stroke of pressure spring
Power variation less, so that the electric hammer releasing structure is after prolonged use, in the case where thread off pressing plate track and worn steel ball, is pressed
The change in torque that spring is supplied to tripping pressing plate is little, and then effectively extends the service life of the releasing structure.
Detailed description of the invention
Structural schematic diagram when Fig. 1 is electric hammer releasing structure normal operating conditions provided by the utility model, wherein taking off
Withhold one pressure spring of setting between plate and washer.
Structural schematic diagram when Fig. 2 is electric hammer releasing structure trip status provided by the utility model, wherein tripping pressure
One pressure spring is set between plate and washer.
Fig. 3 be electric hammer releasing structure provided by the utility model structural schematic diagram, wherein tripping pressing plate and washer it
Between setting 2 with compression spring.
Fig. 4 is the A-A cross-sectional view of Fig. 3.
Wherein, 10, jackshaft；20, bevel gear；30, transmission gear；31, steel ball mounting hole；40, tripping pressing plate；41, steel
Ball groove；42, sleeve part；50, washer；51, taper hole；52, retainer ring；60, pressure spring；101, steel ball；102, top board；103, bearing.
Specific embodiment
Fig. 1, Fig. 2, electric hammer releasing structure provided by the utility model, including jackshaft 10 are please referred to, jackshaft is set to
Bevel gear 20, transmission gear 30 on 10, tripping pressing plate 40 and washer 50, wherein the tripping pressing plate 40 and the washer 50 it
Between be provided at least one pressure spring 60, thread off required pressure for providing tripping pressing plate 40, the pressing plate 40 that will thread off presses against
On transmission gear 30, that is to say, that the pressure spring 60 is assemblied between tripping pressing plate 40 and washer 50 in a manner of precompressed
, the press effect to tripping pressing plate 40 is realized with this.
Wherein, the bevel gear 20 and the tripping pressing plate 40 on the circumferencial direction of the jackshaft 10 with it is described in
Between axis 10 be fixedly connected；The tripping pressing plate 40 is slidably connected in the axial direction of the jackshaft 10 with the jackshaft 10；And
The transmission gear 30 and the jackshaft 10 rotation connection, press against institute by pressure spring 60 in conjunction with the tripping pressing plate 40
It states on transmission gear 30, realizes that transmission gear 30 drives jackshaft 10 to be rotated by tripping pressing plate 40 with this, and then realize
Rotation driving to bevel gear 20.
It is appreciated that the relationship that interconnection acts between the transmission gear 30 and the tripping pressing plate 40, specifically may be used
It is realized with being used as transmission medium by steel ball, or setting phase interaction will be passed through between transmission gear 30 and tripping pressing plate 40
Friction inclined-plane is realized.
Due to the relationship of interconnection effect between the transmission gear 30 and the tripping pressing plate 40, to the skill of this field
The prior art is belonged to for art personnel, does not just do specifically temporarily open explanation herein, below with regard to transmission gear 30 and tripping pressing plate 40
Between with steel ball carry out be connected with each other make be used as specific introduction.
Specifically, multiple steel ball mounting holes 31 are offered on the flank of tooth of the transmission gear 30, and are installed in each steel ball
It is correspondingly arranged a steel ball 101 in hole 31, and the upper and lower ends of the self-corresponding steel ball mounting hole 31 of each steel ball 101 are to overhanging
Out, the steel ball 101 extends downwardly the steel-ball groove 41 that offers on the part and the tripping pressing plate 40 of steel ball mounting hole 31 and supports
Cooperation is connect, the part for stretching out steel ball mounting hole 31 upwards carries out gland with the top board 102 being socketed on jackshaft 10, and described
Top board 102 is then that the bearing 103 by being socketed on jackshaft 10, and set on 20 lower section of bevel gear is limited.Namely
It says, in normal state, the pressure spring 60 will thread off pressing plate 40 when pressing against on transmission gear 30, on the tripping pressing plate 40
Steel-ball groove 41 is bonded to each other with the steel ball 101 in the steel ball mounting hole 31 of transmission gear 40, works as driving cog in this way
Wheel 40, can be by the mutual cooperation between steel ball 101 and the steel-ball groove 41 for pressing plate 40 of threading off, to realize pair when rotation
The rotation driving of tripping pressing plate 40, and then realize and rotation driving is carried out to jackshaft 10 and bevel gear 20.
From the foregoing, it will be observed that the electric hammer releasing structure of the present embodiment is in normal work, motor band nutating gear 30 rotates,
Under the spring-force driven dual of pressure spring 60, the steel-ball groove 41 of the tripping pressing plate 40 is pressed against corresponding steel in the transmission gear 30
On ball 101, the steel ball 101 on make to thread off steel-ball groove 41 and transmission gear 30 on pressing plate 40 in steel ball mounting hole 31 cooperates, and makes
Transmission gear 30 can drive tripping pressing plate 40 to rotate by steel ball 101 while rotating, then passed through by tripping pressing plate 40
Between axis 10 rotated with dynamic bevel gear 20, and drive drill bit assembly to work with this.
And when encountering overload or stall, that is, the bevel gear 20 and jackshaft 10 are stuck when not turning, the centre
Transmission gear 30 on axis 10 is also rotating, and transmission gear 30 just will push steel ball 101 from the steel ball on tripping pressing plate 40 at this time
On the step (part of the tripping pressing plate 40 in 41 periphery of steel-ball groove) of the disengaging of slot 41 and upper tripping pressing plate 40, and then make tripping pressure
Plate 40 squeezes pressure spring 60 and moves down, and realizes the tripping between tripping pressing plate 40 and transmission gear 30 with this, protects to play overload
The effect of shield；It is also being rotated in non-stop-machine premise lower transmissioning gear 30, the steel ball 101 on transmission gear 30 will cross tripping
Step on pressing plate 40, steel ball slide into track, and simultaneously, pressure spring 60 will provide the tripping pressure that pressing plate 40 moves up, and real
Steel ball 101 cooperates with the steel-ball groove 41 on tripping pressing plate 40 again on existing transmission gear 30.
The electric hammer releasing structure of the present embodiment, the shape of the pressure spring 60 between tripping pressing plate 40 and washer 50 specifically can be with
It is set as cylindrical pressure spring or taper pressure spring, and the quantity of pressure spring 60 is specifically configured to one, and a pressure spring 60 is specifically
It is socketed on jackshaft 10, and is reciprocally connect cooperation with tripping pressing plate 40 and washer 50 respectively, realized with this to tripping
The upward press effect of pressing plate 40.Further, the tripping pressing plate 40 is lateral overhanging in deviate from the transmission gear 30 one
There is a sleeve part 42 out, and when the pressure spring 60 is contacted with the tripping pressing plate 40 and the washer 50, the tripping
Sleeve part 42 on pressing plate 40 is extended downwardly into pressure spring 60.Thus it has been convenient for the assembly threaded off between pressing plate 40 and pressure spring 60
Limit, ensures the effect that 60 pairs of tripping pressing plates 60 of pressure spring press upwards with this.
Please refer to Fig. 3, Fig. 4, the pressure spring 60 between the tripping pressing plate 40 and washer 50 of the present embodiment may be alternatively provided as it is multiple,
And the periphery of the jackshaft 10 is specifically arranged in multiple pressure springs 60 in a manner of annular array.It of courses and needs to illustrate
, compared to the embodiment that a pressure spring 60 is arranged between tripping pressing plate 40 and washer 50, this is provided with multiple pressure springs 60
Due to being specifically separation in the periphery of jackshaft 10, then need the both side ends of pressure spring 60 and the tripping pressing plate 40 and institute
It states washer 50 to fix, to prevent being moved in the radial direction in jackshaft 10 of pressure spring 60.Further, described de-
Withholding the multiple pressure springs 60 being provided between plate 40 and the washer 50 can be 2 or more (e.g., 3,6 or 8).
In the present embodiment, the washer 50 offers a taper hole 51 on the side end face towards jackshaft 10, and
A retainer ring 52 being inlaid on the jackshaft 10, and the retainer ring 52 and the washer are provided in the taper hole 51 of the washer 50
50 contact, with this ensure washer 50 on jackshaft 10 rigging position it is constant, and then play ensure 50 pairs of washer pressure
The press of spring 50 supports.
To sum up, electric hammer releasing structure provided by the utility model substitutes disc spring in the prior art with pressure spring to mention
The pressure on transmission gear is pressed against for tripping pressing plate, compared with prior art, is mentioned after the slight change of the compressed stroke of pressure spring
The pressure change of confession is little, so that the electric hammer releasing structure is after prolonged use, the feelings of thread off pressing plate track and worn steel ball
Under condition, the change in torque that pressure spring is supplied to tripping pressing plate is little, and then effectively extends the service life of the releasing structure.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
Above-described embodiments merely represent several embodiments of the utility model, the description thereof is more specific and detailed,
But it cannot be understood as the limitations to utility model patent range.It should be pointed out that for the common skill of this field
For art personnel, without departing from the concept of the premise utility, various modifications and improvements can be made, these are belonged to
The protection scope of the utility model.Therefore, the scope of protection shall be subject to the appended claims for the utility model patent.
Claims (9)
1. a kind of electric hammer releasing structure, including jackshaft, set on the bevel gear of jackshaft, transmission gear, tripping pressing plate and washer；
The bevel gear and the tripping pressing plate are fixedly connected in the circumferencial direction of the jackshaft with the jackshaft；It is described de-
Plate is withheld to be slidably connected in the axial direction of the jackshaft with the jackshaft；The transmission gear and jackshaft rotation connect
It connects；It is characterized by: it is provided at least one pressure spring between the tripping pressing plate and the washer, it is de- for providing tripping pressing plate
Required pressure when button.
2. electric hammer releasing structure according to claim 1, it is characterised in that: set between the tripping pressing plate and the washer
It is equipped with a pressure spring, the pressure spring is socketed in the jackshaft.
3. electric hammer releasing structure according to claim 2, it is characterised in that: the tripping pressing plate is deviating from the driving cog
The side of wheel is protruding a sleeve part, and when the pressure spring and the tripping pressing plate and the washer contact, institute
The sleeve part stated on tripping pressing plate is extended downwardly into pressure spring.
4. electric hammer releasing structure according to claim 1, it is characterised in that: set between the tripping pressing plate and the washer
Multiple pressure springs are equipped with, the periphery of the jackshaft is arranged in the multiple pressure spring in a manner of annular array.
5. electric hammer releasing structure according to claim 3, it is characterised in that: wherein the both side ends of each pressure spring with it is described
It threads off to limit between pressing plate and the washer and fix.
6. electric hammer releasing structure according to claim 5, it is characterised in that: set between the tripping pressing plate and the washer
2 are equipped with compression spring.
7. electric hammer releasing structure according to claim 1, it is characterised in that: the washer is in the side towards jackshaft
A taper hole is offered on face, and a retainer ring being inlaid on the jackshaft is provided in the taper hole of the washer, and the card
Circle is contacted with the washer.
8. electric hammer releasing structure according to claim 1, it is characterised in that: the pressure spring be set as cylindrical pressure spring or
Taper pressure spring.
9. electric hammer releasing structure according to claim 1, it is characterised in that: offered on the flank of tooth of the transmission gear more
A steel ball mounting hole, and a steel ball is correspondingly arranged in each steel ball mounting hole, and the self-corresponding steel ball installation of each steel ball
The upper and lower ends in hole are protruding, and the steel ball extends downwardly to be offered on the part and the tripping pressing plate of steel ball mounting hole
Steel-ball groove contacts, and the part for stretching out steel ball mounting hole upwards carries out gland with the top board being socketed on jackshaft.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820318228.9U CN208246735U (en) | 2018-03-08 | 2018-03-08 | Electric hammer releasing structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820318228.9U CN208246735U (en) | 2018-03-08 | 2018-03-08 | Electric hammer releasing structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208246735U true CN208246735U (en) | 2018-12-18 |
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ID=64607876
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820318228.9U Active CN208246735U (en) | 2018-03-08 | 2018-03-08 | Electric hammer releasing structure |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208246735U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021088530A1 (en) * | 2019-11-07 | 2021-05-14 | 苏州宝时得电动工具有限公司 | Electric hammer tripping mechanism |
-
2018
- 2018-03-08 CN CN201820318228.9U patent/CN208246735U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021088530A1 (en) * | 2019-11-07 | 2021-05-14 | 苏州宝时得电动工具有限公司 | Electric hammer tripping mechanism |
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