CN2924045Y

CN2924045Y - Effort-saving starting device

Info

Publication number: CN2924045Y
Application number: CN 200620113936
Authority: CN
Inventors: 廖家兴
Original assignee: 钟李杏枝
Current assignee: Husqvarna AB
Priority date: 2006-05-12
Filing date: 2006-05-12
Publication date: 2007-07-18
Anticipated expiration: 2016-05-12

Abstract

An effort-saving start device includes a start unit, a clutch unit and a transmission unit. The clutch unit is connected between the start unit and the transmission unit. The start unit and the transmission unit are respectively provided with a first disk spring and a second disk spring. When the start unit is subjected to a function and is positively rotated, the clutch unit can drive the transmission to rotate and make the two groups of disk springs store the energy. When the first disk spring of the start unit releases the energy to make the start unit reversely rotate, the clutch unit makes the start unit disconnect with the transmission unit without diversion, in this way, the second disk spring drives the transmission unit to continue to rotate, and thus the engine connected to the transmission unit is started.

Description

Laborsaving starting drive

Technical field

The utility model relates to a kind of laborsaving starting drive, can be applicable on the engine starting device of multiple power tool, and the user can start engine than the labour-saving by this.

Background technique

Known have a multiple power tool, can start its engine by a starting drive.For example, general mowing machine, branches and leaves trimmer ... wait gardening with in the internal combustion engine of power tool, the starting drive of engine mainly comprises following part: a starter handle, a starter shell, a disc spring group and a reel, wherein the starter handle is connected to a rope, rope is wrapped on the reel, and reel is connected to this disc spring group.As user during with hand pull activator appliance handle, rope just drives reel, and then starts engine, utilizes the disc spring restoring force in the disc spring group simultaneously, forces the reel rotation to return original position, makes rope and starter handle be able on the rollback reel.

Wherein shortcoming of the known starting drive of this kind is that user's pull starts handle and comparatively requires great effort.This is because reel is connected on the disc spring group, so user's pull must overcome engine internal pressure when starting handle, and by the restoring force of disc spring in the disc spring group, make the reel rotation return original position, that is to say, the distance that the startup handle is drawn out is big more, and the user will feel effort more.

Another shortcoming then is that igniting number of times and speed are slow excessively.The major function of known starting drive is exactly that the user starts handle by the hand pull, utilizes the rotation of reel to drive other mechanism's rotation and engine ignition is started; Yet known starting drive is subjected to the influence of engine internal pressure, the drive engine running of can't lighting a fire fast; More particularly, the user must increase and applies pulling force and promote speed of ignition and number of times, therefore apparently, the each pull of user starts speed that handle produced and crosses when slow, relative igniting number of times is just less and be not easy to start engine, this just why the user usually must be hard repeatedly pull start handle, could start the cause of engine.

The technological scheme that patent cases such as US publication US 2002/0121258 A1, US 2002/0174848 A1, US 2004/0065289A1, US 2004/0123827 A1, US 2004/0123827 A1 are provided then all has the function of the aforementioned disappearance of improvement.

Summary of the invention

Main purpose of the present utility model is to provide a kind of structure that is different from aforementioned previous patent case, and the more infallible starting drive of start.

Structure characteristic of the present utility model is to include a start unit, a clutch unit and a gear unit, and this clutch unit is connected between this start unit and the gear unit; Described start unit and gear unit are respectively equipped with first disc spring and second disc spring; When being rotated in the forward when the start unit effect, can drive this gear unit rotation and allow two groups of disc spring stored energy simultaneously via this clutch unit, when first disc spring of start unit releases energy and makes the start unit counterrotating, then clutch unit makes this start unit separate with gear unit and does not pin down, thereby drive this gear unit by this second disc spring and continue rotation, and then the engine that is connected in this gear unit started, to reach the labour-saving operating effect.

The technological means of start unit of the present utility model, include a shell, a handle in conjunction with rope yarn, one first disc spring and a reel, this first disc spring and reel are all gone here and there and are located at the central shaft that is located at shell, after described rope yarn is wound in this reel and extends this shell again in conjunction with this handle.

The technological means of clutch unit of the present utility model includes a disc spring wheel and a slide block, and slide block wherein is combined in this reel and can rotates along with reel, also can diametrically opposedly move in the reel straight line simultaneously; The bi-side of described disc spring wheel then are connected in this reel and this gear unit simultaneously, make slide block between disc spring wheel and reel; Have the unidirectional drive mechanism of pulling that supports between this slide block and the disc spring wheel, therefore, start unit can drive this gear unit rotation via this clutch unit at single direction, but gear unit can't drive the starting drive counterrotating by this clutch unit.

The utility model also is provided with position structure between described reel and disc spring wheel, have the function of angular positioning when making reel in the rotation with static relative rotation of disc spring wheel.

Gear unit of the present utility model, include one second disc spring and a pawl disk, the two ends of this second disc spring are connected to this pawl disk and described disc spring wheel, and pawl disk then is fixed in the central shaft of shell, are therefore made the second disc spring stored energy when the rotation of disc spring wheel.

The utility model and Prior Art in comparison, the combination of its assembly is more easy, entire mechanism running is more certain, rate of fault is lower.

Description of drawings

Fig. 1 is for showing the three-dimensional exploded view of the utility model primary clustering combination relation.

Fig. 2 is the three-dimensional exploded view that shows the utility model assemblying relation from another angle.

Fig. 3 is for showing the section plan of the utility model structure.

When Fig. 4 A-4C turns clockwise for the reel that shows the utility model, drive the planar gesture figure that drive wheel turns clockwise via slide block.

When Fig. 5 A-5D rotated for the contrary pin of the reel that shows the utility model, drive wheel can not be activated the planar gesture figure of rotation.

The symbol description of primary clustering shown in the figure

A...... start unit

B...... clutch unit

C...... gear unit

1...... shell

11...... central shaft

12...... handle

13...... groove

2...... first disc spring

21...... first end

22...... second end

3...... reel

30...... sinking space

31...... polygonal projection

310...... center hole

32...... pleurapophysis piece

33...... shell fragment

34...... duct

4...... slide block

41...... through hole

42...... stopper tooth

421...... slip surface

422...... support the face of pulling

5...... disc spring wheel

51...... axis hole

52...... sunk area

53...... short slot

54...... rotating shaft

55...... gear

56...... recess

57...... groove

6...... second disc spring

7...... pawl disk

70...... barrel mast

71...... shrinkage pool

72...... groove

73...... ratchet

74...... packing ring

75...... screw

Embodiment

Following conjunction with figs. and element numbers are done more detailed description to mode of execution of the present utility model, know this skill person and can implement according to this after studying this specification carefully in order to do making.

At first see also Fig. 1 to Fig. 3, preferred embodiment of the present utility model includes a start unit A, a clutch unit B and a gear unit C.Wherein, this start unit A includes shell 1, handle 12, one first disc spring 2 and a reel 3 in conjunction with rope yarn that possesses central shaft 11; Wherein, described reel 3 axially have first side and second side, this first side is towards shell 1 and the one side of assembling; Described second side is provided with the sinking space 30 of a circle, and the bottom surface central authorities of this sinking space 30 are provided with an axially extended polygonal projection 31, and the central authorities of this polygonal projection 31 then are provided with a center hole 310 that connects; In addition, the internal diameter circumference of this sinking space 30 can be provided with and be used for taking turns the 5 plural shell fragments 33 of locating with the disc spring of clutch unit B; The sinking space bottom surface of the polygonal projection 31 symmetrical both sides of reel 3 also can be provided with axially extended pleurapophysis piece 32, keeps an appropriate intervals between this pleurapophysis piece 32 and the polygonal projection 31.This first disc spring 2 and reel 3 all go here and theres the central shaft 11 that is located at this shell 1, and first end 21 of first disc spring 2 is distinguished build-ins in the groove 13 of this shell 1 and the caulking groove 35 of reel 3 with second end 22; The rope yarn that is wound in behind the reel 3 then passes shell 1, again in conjunction with leader 12.

Clutch unit B of the present utility model includes a slide block 4 and disc spring wheel 5; Wherein, this slide block 4 has a through hole 41, and the minimum diameter of this through hole 41 approximates the maximum outside diameter of aforementioned polygonal projection 31; The better embodiment of this through hole 41 can form long rectangle.This slide block 4 is placed in the sinking space 30 of reel 3, and makes this polygonal projection 31 pass the through hole 41 of slide block 4; The relative both sides of slide block 4 are respectively equipped with a stopper tooth 42, and these two stoppers tooth, 42 rightabout sides are formed with slip surface 421, and rightabout opposite side then is formed with to the face of pulling 422; Its preferred implementation is that this slip surface 421 is formed inclined-plane or cambered surface, supports the face 422 of pulling then is equal to or less than 90 degree for the angle with the outside, slide block 4 ends right angle or acute angle.This slide block 4 is a sinking space 30 of putting into reel 3, and its through hole 41 is passed by the polygonal projection 31 of reel 3, makes two side within the slide block 4, between external diameter be placed on gap between this polygonal projection 31 and the described pleurapophysis piece 32 simultaneously.

Described disc spring wheel 5 axially have first side and a second side surface opposite, this first side is defined as towards reel 3 and the one side of assembling, this first side can be provided with the gear 55 that an external diameter has the plural gear teeth, and a sunk area 52 is set at the end face of this gear 55, an internal diameter equal angles ground distributive plural short slot 53 of this sunk area 52, the internal diameter of this short slot 53 is greater than the internal diameter of this sunk area 52, thereby forms several fan-shaped short slots 53 at the excircle of sunk area 52; Second side of disc spring wheel can be provided with a recess 56, and in the bottom center of this recess 56 rotating shaft 54 is set, and the center of this rotating shaft 54 has the axis hole 51 of perforation to first and second side; Sidewall then can be provided with a groove 57 at least around this recess 56.

Be positioned over the sinking space 30 of reel 3 when slide block 4 after, the gear 55 of disc spring wheel 5 is positioned in this sinking space 30 again, and a stopper tooth 42 of slide block 4 is contained in wherein in the groove 53; Simultaneously, gear 55 gear teeth of being located at disc spring wheel 5 then are meshing with each other with shell fragment 33 ends of reel 3.

The preferred embodiment of gear unit C of the present utility model includes one second disc spring 6 and a pawl disk 7; Pawl disk 7 axial first sides (side of assembling towards disc spring wheel 5) wherein are provided with the barrel mast 70 that possesses a shrinkage pool 71, and the sidewall of this barrel mast 70 also is provided with a groove 72, and the bottom surface of shrinkage pool 71 is the central hole for running through then; Second side with respect to this first side then is provided with a ratchet 73.Described second disc spring 6 is to be positioned in the sunk area 56 of disc spring wheel 5, and the two ends that make second disc spring 6 be positioned at external diameter and internal diameter are embedded in the groove 72 of groove 57 and pawl disk 7 of recess 56 perisporiums of disc spring wheel 5 respectively, and rotating shaft 54 is assembled in this shrinkage pool 71 with loose fit, pass pawl disk 7 and lock central shaft 11 with fixing-assembly again, but pawl disk 7 can be rotated by deadlock; After the preferred embodiment of described fixing-assembly can adopt screw 75 to pass a packing ring 74, make screw 75 lock the set screw (as shown in Figure 3) in central shaft 11 ends again, to finish the combination of aforementioned each assembly.

Mode of operation of the present utility model is described as follows:

When desire activates engine, during user's pull handle 12, the rope yarn that is wound in reel 3 will drive reel 3 turn clockwise (shown in Fig. 4 A), 4 of the slide blocks of polygonal projection 31 that are sticked in reel 3 are along with synchronous rotation, and then make the pull end (shown in Fig. 4 B) of groove 53 of face 422 contact disc springs wheels 5 of supporting of slide block 4, thereby drive disc spring wheel 5 also turns clockwise (shown in Fig. 4 C), 33 on shell fragment on the reel 3 provides in the engine operation, avoid disc spring wheel 5 to rotate freely because of vibration, cause central shaft 11 wearing and tearing, that is the fixedly usefulness of disc spring wheel 5 is provided; At this moment, because reel 3 all turns clockwise with disc spring wheel 5, thereby taken up first disc spring 2 and second disc spring 6 simultaneously and stored energy.When the user decontrols handle 12 and when discharging the pulling force of rope yarn, then first disc spring, 2 stored energy will be released and make reel 3 be rotated counterclockwise (shown in Fig. 5 A), thereby make the slide block 4 that is incorporated into reel 3 also along with being rotated counterclockwise; When the slip surface 421 of the stopper tooth 42 of slide block 4 touches groove 53 ends of disc spring wheel 5 (shown in Fig. 5 B), slip surface 421 will be crossed groove 53 ends (shown in Fig. 5 C and Fig. 5 D), and crosses groove 53 in the above described manner up to stopping according to the size of its energy.In other words, reel 3 is rotated counterclockwise Shi Buhui and drives disc spring wheel 5, thereby rotates with pawl disk 7 by second disc spring, 6 stored energy drive disc spring wheels 5, makes the ratchet 73 that is connected in engine drive the engine starting.

The above person only is in order to explain the preferred embodiment of the utility model; be not that attempt is done any formal restriction to the utility model according to this; be with; all have in following any modification or change of making relevant the utility model of identical model utility spirit, all must be included in the category of the utility model intention protection.

Claims

1. a laborsaving starting drive is characterized in that, comprising:

One start unit, include shell, a handle in conjunction with rope yarn, one first disc spring and a reel that possesses central shaft, this first disc spring and reel are all gone here and there and are located at this central shaft, and the two ends of this first disc spring are connected to first side of this central shaft and this reel; Described rope yarn is wound in this reel and extends this shell, and this handle is located at outside this shell, and connects this rope yarn; Second side of described reel is provided with the sinking space of a circle, and the bottom surface of this sinking space is provided with an axially extended polygonal projection;

One clutch unit includes a disc spring wheel and a slide block, this disc spring wheel shaft to first side be provided with a sunk area, be distributed with to the internal diameter equal angles of this sunk area a plurality of short slots, the axial second side center that this disc spring is taken turns is provided with a rotating shaft; Described slide block has a through hole, the minimum diameter of this through hole approximates the maximum outside diameter of aforementioned polygonal projection, this slide block places the sinking space of this reel, and make this polygonal projection pass this through hole, the relative both sides of described slide block are respectively equipped with a stopper tooth, the rightabout side of this two stoppers tooth is formed with slip surface, and rightabout opposite side then is formed with to the face of pulling;

One gear unit, include one second disc spring and a pawl disk, this second disc spring is located at second side of this disc spring wheel, the first axial side of this pawl disk is provided with the barrel mast that the end possesses a shrinkage pool, the second relative side is provided with a ratchet, the rotating shaft system of described disc spring wheel is assembled in this shrinkage pool with loose fit, and the two ends of described second disc spring are connected to this pawl disk and take turns with disc spring, this pawl disk then with fixing-assembly be fixed on aforementioned among axle.

2. according to the described laborsaving starting drive of claim 1, it is characterized in that, the sinking space internal diameter circumference of described reel is provided with plural shell fragment, and first side of described disc spring wheel is provided with a gear, the axial end of this gear then is provided with described sunk area, this train of gearings is combined in the sinking space of this reel, and makes the end engagement of the gear teeth and this shell fragment of this gear.

3. according to arbitrary described laborsaving starting drive in claim 1 or 2, it is characterized in that the slip surface of described drive wheel and slide block is an inclined-plane.

4. according to arbitrary described laborsaving starting drive in claim 1 or 2, it is characterized in that the slip surface of described drive wheel and slide block is a cambered surface.

5. according to the described laborsaving starting drive of claim 3, it is characterized in that, the sinking space of the polygonal projection symmetry both sides of described reel is provided with axially extended pleurapophysis piece, and the space between this pleurapophysis piece and this polygonal projection approximates within institute's slide block, the sidewall thickness between the external diameter.

6. according to the described laborsaving starting drive of claim 4, it is characterized in that, the sinking space of the polygonal projection symmetry both sides of described reel is provided with axially extended pleurapophysis piece, and the space between this pleurapophysis piece and this polygonal projection approximates within institute's slide block, the sidewall thickness between the external diameter.