CN209633188U - The chain tensioning mechanism of Tree chain saw - Google Patents

Abstract

The utility model relates to a kind of chain tensioning mechanisms of Tree chain saw, carrier bar including being set to the front end of saw body, and the tension knob component that carrier bar can be driven to be moved forward and backward, tension knob component includes the tension knob in saw body and being adjusted by rotation, the turntable that can be rotated coaxially with tension knob, with the involute-type convex ribs that radius is cumulative on the end face of turntable, the sliding part that can be moved forward and backward with carrier bar is connected on carrier bar, there is the muscle slot slided for convex ribs on the end face of sliding part, the rotation of tension knob drives sliding part and carrier bar moves forward and then tension chain, it further include the locking device for tension knob component to tighten together with saw body.The drive mechanism that this involute-type convex ribs and muscle slot are slidably matched, so that turntable is during rotation, the stress of sliding part is more stable, higher to the degree of regulation of chain, is not in the loosening problem for carrying out tensioning adjusting to chain using gear drive in the prior art.

Description

The chain tensioning mechanism of Tree chain saw

Technical field

The utility model relates to Tree chain saw technical field more particularly to a kind of chain tensioning mechanisms of Tree chain saw.

Background technique

Chain saw is a kind of to drive the chain high speed rotation of band blade by power device to cut the gardens of timber or branch Tool.Since the chain in chain saw is inevitably worn in use, chain can become slack on guide plate, lead to chain Saw cisco unity malfunction, it is therefore desirable to adjust the tensioning of the chain power, often to keep chain saw that can work normally.

At present the method for adjustment chain tension it is general there are two types of: one is borrowing external tool to be adjusted, such as with special It is adjusted with spanner, this method is more original, and is needed when adjustment by other tools, very inconvenient；Another kind is logical The included adjustment device of chain saw is crossed to be adjusted, is not needed by other external tools, such as application No. is " a kind of chain of improvement disclosed in the Chinese utility model patent of CN200620123720.8 (Authorization Notice No. CN2920593Y) Saw ", saw chain tension adjusting device mainly uses rotation hand wheel to drive pinion gear rotation, is then done by pinion gear band carry-over bar Linear motion, and then moved in a straight line by rack drives guide plate, saw chain is tensioned by guide plate, the regulating device is in adjusting When it is simple and convenient.For another example application No. is CN200720105821.7 (Authorization Notice No. CN201011381Y) China is practical " Electric chain saw chain swelling and locking device " disclosed in new patent has also made class to this gear-driven tightening regulator Like open.

But the tightening regulator of the chain saw in above-mentioned patent also has certain deficiency, firstly, since rack-and-pinion Tooth pitch it is larger, adjusting handle drive pinion gear it is every rotation one unit angle, rack gear will drive guide plate generate one it is larger The displacement of distance, although this accelerates adjustment speed, but reduces the precision of adjusting, secondly, nibbling between rack-and-pinion It is larger to close gap, after tensioning, due to the presence in the gap, guide plate also will appear a degree of front and back and loosen.

Utility model content

For the current state of the art, the technical problem to be solved by the utility model is to provide a kind of degree of regulation is high The chain tensioning mechanism of Tree chain saw.

Technical solution adopted by the utility model to solve the above technical problems is as follows: a kind of chain tension machine of Tree chain saw Structure, including be set to saw body front end and can the carrier bar that is moved forward and backward of opposite saw body, and before the carrier bar can be driven The tension knob component moved afterwards, chain are set in the key way of the carrier bar, and the tension knob component includes being set to the chain On saw body and the tension knob being adjusted by rotation, the turntable that can be rotated coaxially with the tension knob, the turntable End face on the cumulative involute-type convex ribs of radius, be connected with the cunning that can be moved forward and backward with carrier bar on the carrier bar Moving part, has the muscle slot for convex ribs sliding on the end face of the sliding part, and the rotation of the tension knob drives the cunning Moving part and carrier bar move forward tension chain in turn；It further include for fastening the tension knob component and the saw body Locking device together.

As an improvement, the locking device includes on the outside of the tension knob and can the relatively described tension knob independence The compression knob of rotation；The saw body is equipped with a bolt, and the bolt passes through the carrier bar, tension knob component and institute It states and compresses knob thread cooperation.After completing the tensioning of the chain operation, it can will be tensioned by compressing the cooperation of knob and bolt Knob assembly is locked in saw body, avoids tension knob component in chain saw use process because vibration loosens.

As an improvement, having a deep gouge on the outer end face of the tension knob, the compression knob is set in the deep gouge； The middle part of the tension knob has the first through hole for being connected to the deep gouge, and the bolt passes through the first through hole and connects the compression Knob.Such structure setting compresses knob by rotation with can be convenient and tension knob is locked or unclamped, wherein will The compression knob is set in the deep gouge, is touched foreign object it is possible to prevente effectively from compressing knob and is damaged.

Knob is compressed in order to further facilitate user's operation, is allowed to carry out flexible rotating in the deep gouge of tension knob, institute Stating and compressing knob includes knob body and the handle assembly for being hinged on described knob body one end；The outside of the knob body has Have an accommodation groove that handle assembly is stated for collecting post, the handle assembly can the relatively described knob body be turned out described in disengaging Accommodation groove forms handle portion, and can inwardly rotate and be accommodated into the accommodation groove relative to the knob body.Wherein, when needing to rotate When compressing knob, the relatively described knob body of handle assembly can be transferred to the handle portion formed convenient for holding outward, work as compression After the completion of knob, compression knob can inwardly be rotated relative to the knob body and be accommodated into the accommodation groove, thus Handle assembly is avoided to touch F. O. D.

In order to avoid in handle assembly deviates from knob body because of vibration in use accommodation groove, the handle group Part includes that the pedestal being hinged in the knob body, the movable part being slidably sleeved on the pedestal and top are held in institute State the elastic component between movable part and the pedestal；When the handle assembly is accommodated into the accommodation groove of the knob body, In Under the elastic reaction of the elastic component, the movable part, which has to slide in and out to push up, holds the trend in the side wall surface of the deep gouge.

In order to further increase the fastness that handle assembly is accommodated in the accommodation groove, have in the side wall surface of the deep gouge There is the annular slot of indent, the end of the movable part has the card division being caught in the annular slot.

Handle assembly is quickly transferred to from the accommodation groove of knob body in order to facilitate user, improves and compresses operating efficiency, The pedestal is rotatablely connected in the knob body by a pin shaft, and torque spring, the torsion bullet are arranged on the pin shaft One end of spring contradicts in the knob body, and the other end contradicts on the pedestal, so that the pedestal is with relatively described Knob body is turned out the trend for being detached from the accommodation groove.

In order to improve stability of tension knob component during rotation process, the involute-type convex ribs are two, It is oppositely arranged on the same end face of the turntable respectively, correspondingly, having on the sliding part is multiple with the convex ribs phase The muscle slot of adaptation.

As an improvement, saw body includes the fixation shell outside the carrier bar, the turntable and tension knob point It She Yu not be inside and outside the fixed shell；There is the recessing groove passed through for the bolt, the turntable on the sliding part Upper the second through-hole with the coaxial arrangement of the first through hole of the tension knob；Recessing groove described in the screw bolt passes, Second through-hole, first through hole connect the compression knob.Such structure setting facilitates saw body and tension knob component And the assembly between compression knob.

Have in order to avoid user slips when rotating tension knob, on the outer side surface of the tension knob anti-skidding Dimpled grain.

Compared with prior art, the advantages of the utility model: the chain tensioning mechanism of the Tree chain saw in the utility model It is to drive carrier bar to exist by being slidably matched between the muscle slot on the radius on turntable cumulative involute-type convex ribs and sliding part Front and back move up, thus realize the purpose of tension chain, the transmission knot that this involute-type convex ribs and muscle slot are slidably matched Structure can effectively convert the rotary motion of turntable to the linear motion of sliding part and carrier bar, also, in for carrying out chain When tight operation, since the convex ribs on turntable are continuous involute-type rib, so turntable is during rotation, sliding part by Power is more stable, higher to the degree of regulation of chain, is not in be opened in the prior art using gear drive to chain The loosening problem tightly adjusted.

Detailed description of the invention

Fig. 1 is the schematic perspective view of the chain tensioning mechanism of Tree chain saw in the utility model embodiment；

Fig. 2 is the exploded view of the chain tensioning mechanism of Tree chain saw in the utility model embodiment；

Fig. 3 is the stereochemical structure signal of the sliding part of the chain tensioning mechanism of Tree chain saw in the utility model embodiment Figure；

Fig. 4 is the tension knob component of the chain tensioning mechanism of Tree chain saw and compression knob in the utility model embodiment The schematic perspective view of cooperation, wherein the handle assembly for compressing knob is in the opening state for being detached from knob body；

Fig. 5 is the stereochemical structure of the tension knob component of the chain tensioning mechanism of Tree chain saw in the utility model embodiment Schematic diagram；

Fig. 6 is another angle of the tension knob component of the chain tensioning mechanism of Tree chain saw in the utility model embodiment Schematic perspective view；

Fig. 7 is the side view of the tension knob component of the chain tensioning mechanism of Tree chain saw in the utility model embodiment；

Fig. 8 is the stereochemical structure signal of the compression knob of the chain tensioning mechanism of Tree chain saw in the utility model embodiment Figure；

Fig. 9 is the vertical of the knob body of the compression knob of the chain tensioning mechanism of Tree chain saw in the utility model embodiment Body structural schematic diagram；

Figure 10 is the handle assembly of the compression knob of the chain tensioning mechanism of Tree chain saw in the utility model embodiment Exploded view.

Specific embodiment

The utility model is described in further detail below in conjunction with figure embodiment.

Referring to Fig. 1-Figure 10, the chain tensioning mechanism of Tree chain saw, including carrier bar 11, tension knob component 30 and locking dress It sets, wherein carrier bar 11 is set to the front end of saw body 10 and saw body 10 can be moved forward and backward relatively, and chain (not shown) is set In in the key way of carrier bar 11, tension knob component 30 can drive carrier bar 11 to be moved forward and backward and then carry out tensioning adjusting to chain, After the completion of carrying out tensioning adjusting to chain, locking device can be used for tension knob component 30 and saw body 10 being fastened on one The locking device risen, and then tension knob component 30 is avoided to rotate, cause the chain after the completion of adjusting to loosen again, specifically Ground, tension knob component 30 include tension knob 31, turntable 32, wherein tension knob 31 is set in saw body 10 and can revolve Modulation section, turntable 32 can be rotated coaxially with tension knob 31, and have radius cumulative gradually on the end face of turntable 32 The type that bursts at the seams convex ribs 321 are connected with the sliding part 12 that can be moved forward and backward with carrier bar 11, the end face of sliding part 12 on carrier bar 11 Upper to have the muscle slot 121 slided for convex ribs 321, the rotation of tension knob 31 drives sliding part 12 and carrier bar 11 to move forward in turn Tension chain, in the present embodiment, in order to improve stability of the tension knob component 30 during rotation process, involute-type Convex ribs 321 be two, be oppositely arranged on the same end face of turntable 32 respectively, correspondingly, on sliding part 12 have it is multiple with The compatible muscle slot 121 of convex ribs 321, is detailed in Fig. 3 and Fig. 5.

Locking device, including being set to the outside of tension knob 31 and can be relative to the compression knob that tension knob 31 independently rotates 40, saw body 10 is equipped with a bolt 13, and bolt 13 passes through carrier bar 11, tension knob component 30 and compresses 40 screw thread of knob Cooperation, is detailed in Fig. 2；After completing the tensioning of the chain operation, tensioning can be revolved by compressing the cooperation of knob 40 and bolt 13 Button component 30 is locked in saw body 10, avoids tension knob component 30 in chain saw use process because vibration loosens. In the present embodiment, there is a deep gouge 310 on the outer end face of tension knob 31, compress knob 40 and be set in deep gouge 310, tensioning The middle part of knob 31 has the first through hole 311 of connection deep gouge 310, and bolt 13 passes through the first through hole 311 connection and compresses knob 40, it is detailed in Fig. 4 and Fig. 6.This structure setting can be convenient by rotation compress knob 40 tension knob 31 is locked or It unclamps, wherein knob 40 will be compressed and be set in deep gouge 310, foreign object is touched it is possible to prevente effectively from compressing knob 40 and damage.For It further facilitates user's operation and compresses knob 40, be allowed to carry out flexible rotating in the deep gouge 310 of tension knob 31, compress rotation Button 40 includes knob body 41 and the handle assembly 42 for being hinged on 41 one end of knob body, wherein the outside of knob body 41 has There is the accommodation groove 410 for accommodating handle assembly 42, handle assembly 42 can be turned out disengaging accommodation groove with respect to knob body 41 410 form handle portion, and can inwardly rotate and be accommodated into accommodation groove 410 relative to knob body 41, are detailed in Fig. 8-Fig. 9.Specifically, when When needing to rotate compression knob 40, handle assembly 42 can be transferred into the handle for being formed and being convenient for holding with respect to knob body 41 outward Portion, after the completion of compressing knob 40 and rotating, can compressing knob 40, inwardly rotation is accommodated into accommodation groove relative to knob body 41 In 410, so that handle assembly 42 be avoided to touch F. O. D.

Handle assembly 42, including be hinged in knob body 41 pedestal 421, be slidably sleeved on pedestal 421 The elastic component 423 between movable part 422 and pedestal 421 is held on movable part 422 and top, and specifically, elastic component 423 can be Reset spring, wherein in order to which preferably the reset spring is fixed between movable part 422 and pedestal 421, have on pedestal 421 There is the location hole 424 for accommodating the reset spring, it is detailed in Figure 10；When handle assembly 42 accommodates the accommodating into knob body 41 In slot 410, under the elastic reaction of reset spring, movable part 422, which has to slide in and out to push up, to be held in the side wall surface of deep gouge 310 Trend, and then effectively prevent occurring the accommodation groove that handle assembly 42 deviates from knob body 41 because of vibration in use Situation in 410.Referring to fig. 2 and Fig. 9, in the present embodiment, pedestal 421 is rotatablely connected knob body 41 by a pin shaft 43 On, torque spring 44 is arranged on pin shaft 43, wherein one end of torque spring 44 contradicts in knob body 41, and the other end supports Touching is on pedestal 421, so that there is pedestal 421 opposite knob body 41 to be turned out the trend for being detached from accommodation groove 410, wherein Torque spring 44 is set between pedestal 421 and knob body 41, facilitates user for handle assembly 42 from knob body 41 It is quickly transferred in accommodation groove 410, improves compression operating efficiency and be correspondingly held in appearance to further increase handle assembly 42 The fastness in slot 410 is set, the annular slot 313 with indent in the side wall surface of deep gouge 310, the end of movable part 422 has It is caught in the card division 420 in annular slot 313, is detailed in Fig. 4 and Fig. 6.

Referring to fig. 2, it is carried out in order to facilitate between saw body 10 and tension knob component 30 and the compression each component of knob 40 Assembly, saw body 10 include the fixation shell 14 outside carrier bar 11, and turntable 32 and tension knob 31 are respectively arranged on fixation Inside and outside shell 14, wherein rotation compresses the outside wall surface that tension knob 31 can be pressed on fixed shell 14 by knob 40 On；There is the recessing groove 122 passed through for bolt 13 on sliding part 12, there is the first through hole with tension knob 31 on turntable 32 Second through-hole 322 of 311 coaxial arrangements, bolt 13 sequentially pass through recessing groove 122, the second through-hole 322, fixed shell 14, first The connection of through-hole 311 compresses knob 40；In addition, in order to avoid user slips when rotating tension knob 31, tension knob 31 Outer side surface on have anti-skidding dimpled grain 312.

In the present embodiment, the chain tensioning mechanism use process of Tree chain saw are as follows: when need to chain carry out tensioning operation When, can stir outward compress knob 40 handle assembly 42, be allowed in can grip state, then user holds the handle assembly 42 loosening pressed knobs 40 make tension knob 31 be in non-impaction state, at this point, user adjusts tension knob 31 in which can be convenient Drive 11 tension chain of carrier bar；When the tensioning of the chain to suitable degree, user can hold the handle assembly 42 and rotate backward Knob 40 is compressed, and then tension knob 31 is made to be in impaction state, after the completion of compressing operation, handle assembly 42 can be fastened to In the accommodation groove 410 of knob body 41, damaged to avoid his object of touching of handle assembly 42 in use.

In the present embodiment, the chain tensioning mechanism of Tree chain saw is the involute-type cumulative by the radius on turntable 32 Being slidably matched between the muscle slot 121 on convex ribs 321 and sliding part 12 drives carrier bar 11 to move in the longitudinal direction, to realize The purpose of tension chain, the drive mechanism that this involute-type convex ribs 321 are slidably matched with muscle slot 121 will can effectively turn The rotary motion of disk 32 is converted into the linear motion of sliding part 12 and carrier bar 11, also, when carrying out the tensioning of the chain operation, by In the convex ribs 321 on turntable 32 be continuous involute-type rib, so turntable 32 is during rotation, the stress of sliding part 12 It is more stable, it is higher to the degree of regulation of chain, it is not in be tensioned in the prior art using gear drive to chain The loosening problem of adjusting.

Claims (10)

1. a kind of chain tensioning mechanism of Tree chain saw, including the opposite saw body in front end and energy for being set to saw body (10) (10) carrier bar (11) being moved forward and backward, and the tension knob component (30) that the carrier bar (11) can be driven to be moved forward and backward, chain In the key way of the carrier bar (11), it is characterised in that: the tension knob component (30) includes being set to the saw body (10) on and the tension knob (31) being adjusted by rotation, the turntable that can be rotated coaxially with the tension knob (31) (32), it on the end face of the turntable (32) with the cumulative involute-type convex ribs (321) of radius, is connected on the carrier bar (11) Can have on the end face of the sliding part (12) and supply the convex ribs with the sliding part (12) that carrier bar (11) are moved forward and backward (321) rotation of the muscle slot (121) slided, the tension knob (31) drives the sliding part (12) and carrier bar (11) Xiang Qianyi Dynamic and then tension chain；

It further include the locking device for the tension knob component (30) to tighten together with the saw body (10).

2. the chain tensioning mechanism of Tree chain saw according to claim 1, it is characterised in that: the locking device includes setting And it can be relative to the compression knob (40) that the tension knob (31) independently rotate on the outside of the tension knob (31)；

The saw body (10) is equipped with a bolt (13), and the bolt (13) passes through the carrier bar (11), tension knob group Part (30) is threadedly engaged with the compression knob (40).

3. the chain tensioning mechanism of Tree chain saw according to claim 2, it is characterised in that: the tension knob (31) There are a deep gouge (310) on outer end face, the compression knob (40) is set in the deep gouge (310)；

The middle part of the tension knob (31) has the first through hole (311) for being connected to the deep gouge (310), and the bolt (13) is worn It crosses the first through hole (311) and connects the compression knob (40).

4. the chain tensioning mechanism of Tree chain saw according to claim 3, it is characterised in that: compression knob (40) packet It includes knob body (41) and is hinged on the handle assembly (42) of the knob body (41) one end；

The outside of the knob body (41) has the accommodation groove (410) for accommodating the handle assembly (42), the handle Component (42) can the relatively described knob body (41) be turned out and be detached from the accommodation groove (410) and form handle portion, and can be opposite Inwardly rotation is accommodated into the accommodation groove (410) knob body (41).

5. the chain tensioning mechanism of Tree chain saw according to claim 4, it is characterised in that: handle assembly (42) packet Include the pedestal (421) being hinged on the knob body (41), the movable part being slidably sleeved on the pedestal (421) (422) and the elastic component (423) between the movable part (422) and the pedestal (421) is held on top；

When the handle assembly (42) is accommodated into the accommodation groove (410) of the knob body (41), in the elastic component (423) Elastic reaction under, the movable part (422), which has, to be slid in and out top and holds the trend in the side wall surface of the deep gouge (310).

6. the chain tensioning mechanism of Tree chain saw according to claim 5, it is characterised in that: the side of the deep gouge (310) With the annular slot (313) of indent on wall surface, the end of the movable part (422), which has, is caught in the annular slot (313) Interior card division (420).

7. the chain tensioning mechanism of Tree chain saw according to claim 6, it is characterised in that: the pedestal (421) passes through One pin shaft (43) is rotatablely connected on the knob body (41), is arranged with torque spring (44), the torsion on the pin shaft (43) One end of power spring (44) contradicts on the knob body (41), and the other end contradicts on the pedestal (421), so that described There is pedestal (421) the relatively described knob body (41) to be turned out the trend for being detached from the accommodation groove (410).

8. the chain tensioning mechanism of Tree chain saw according to claim 1-7, it is characterised in that: the involute Type convex ribs (321) are two, are oppositely arranged on the same end face of the turntable (32) respectively, correspondingly, the sliding part (12) there is the multiple and convex ribs (321) compatible muscle slot (121) on.

9. according to the chain tensioning mechanism of the described in any item Tree chain saws of claim 3-7, it is characterised in that: saw body It (10) include the fixation shell (14) external set on the carrier bar (11), the turntable (32) and tension knob (31) are respectively arranged on Inside and outside the fixed shell (14)；

There is the recessing groove (122) passed through for the bolt (13) on the sliding part (12), have on the turntable (32) with The second through-hole (322) of first through hole (311) coaxial arrangement of the tension knob (31)；

The bolt (13) sequentially passes through the recessing groove (122), the second through-hole (322), first through hole (311) and connects the pressure Tight knob (40).

10. the chain tensioning mechanism of Tree chain saw according to claim 1, it is characterised in that: the tension knob (31) Outer side surface on have anti-skidding dimpled grain (312).