CN210053950U

CN210053950U - Driving device of hedge trimmer and hedge trimmer

Info

Publication number: CN210053950U
Application number: CN201920481931.6U
Authority: CN
Inventors: 郭晓峰; 包成
Original assignee: ZHEJIANG TITAN MACHINERY Co Ltd
Current assignee: ZHEJIANG TITAN MACHINERY Co Ltd
Priority date: 2019-04-10
Filing date: 2019-04-10
Publication date: 2020-02-14
Anticipated expiration: 2029-04-10

Abstract

The utility model relates to the technical field of garden trimming equipment, and discloses a driving device of a hedge trimmer and the hedge trimmer, wherein the driving device of the hedge trimmer comprises a driving mechanism and a brake mechanism; the driving mechanism comprises a power component and a driven disk driven by the power component; the brake mechanism comprises a brake pad; the brake block is involutory to form the annular around the periphery of driven disk, and the both ends that the brake block is involutory deviate from each other and extend, and one of them end extension that the brake block is involutory forms regulation portion. The utility model discloses the drive arrangement of hedge trimmer and the brake time of hedge trimmer are short, can brake fast to the cutter can be at the internal stop rotation of short time, has eliminated the blade because inertia pivoted potential safety hazard.

Description

Driving device of hedge trimmer and hedge trimmer

Technical Field

The utility model belongs to the technical field of gardens pruning equipment technique and specifically relates to a drive arrangement and hedge trimmer of hedge trimmer is related to.

Background

The hedge trimmer is a relatively common garden professional pruning tool, and the existing hedge trimmer generally stops the blade by means of a mode that a lower pressing plate and a blade support (or a moving part which is connected with the lower pressing plate and the blade support) are rubbed by scissors after an accelerator is loosened, so that the natural stopping function of the blade is realized, and the safety of an operator is protected. However, after the throttle is released, due to the inertia effect of the blade and the limited friction effect of the lower pressing plate and the blade support, the blade still continues to operate for a long time, and certain potential safety hazards still exist.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a drive arrangement of hedge trimmer to solve the above-mentioned technical problem who exists among the prior art.

An object of the utility model is also to provide a hedge trimmer to solve the above-mentioned technical problem who exists among the prior art.

Based on the first purpose, the utility model provides a driving device of a hedge trimmer, which comprises a driving mechanism and a braking mechanism;

the driving mechanism comprises a power component and a driven disk driven by the power component;

the brake mechanism comprises brake pads, the brake pads are oppositely arranged to form a ring shape surrounding the periphery of the driven disc, two oppositely arranged ends of the brake pads are oppositely extended, one end of the oppositely arranged brake pads is extended to form an adjusting part, and the other end of the oppositely arranged brake pads is extended to form a fixing part;

the adjusting part moves along a first direction, and the brake pad and the driven disc are in a first state; the adjusting part resets along a second direction, and the brake pad and the driven disc are in a second state;

the second direction is opposite to the first direction, the first state and the second state are respectively one of a holding braking state and a separation non-braking state, and the first state and the second state are different.

Furthermore, the brake mechanism also comprises a brake cable and a brake return spring;

the brake cable and the brake return spring can be connected with the adjusting part respectively, the brake cable is tensioned, and the adjusting part moves along a first direction to enable the brake pad and the driven disc to be in a first state; the brake cable is loose, and the adjusting part is reset along the second direction when the brake reset spring pushes the adjusting part, so that the brake pad and the driven disc are in the second state.

Further, drive arrangement still includes drive protection casing, actuating mechanism brake block and brake reset spring sets up in the drive protection casing.

Furthermore, the brake cable is connected with the brake pad through a connecting rod, the adjusting part is J-shaped, and the J-shaped hook end of the adjusting part is far away from the connecting rod;

the driving protection shell is provided with a limiting piece, the limiting piece is arranged opposite to the hook end of the adjusting part, and a spring accommodating gap is formed between the limiting piece and the hook end of the adjusting part; the brake return spring is arranged in the spring accommodating gap and is arranged along the connecting line direction of the hook end of the adjusting part and the limiting piece;

a guide rod is connected between the connecting rod and the J-shaped hook end of the adjusting part, the guide rod penetrates through the brake return spring, and the guide rod penetrates through the limiting piece in a sliding manner;

the brake cable is tensioned to drive the connecting rod to be far away from the limiting piece, the guide rod drives the hook end face of the adjusting part to slide towards the limiting piece, the brake return spring is compressed, and the brake piece and the driven disc are in a first state; the brake cable is loosened, the brake reset spring pushes the hook end of the adjusting portion to be far away from the limiting piece, the guide rod drives the connecting rod to reset, and the brake piece and the driven disc are in a second state.

Furthermore, the brake mechanism also comprises a plurality of connecting rods which are sequentially hinged;

and a first connecting rod of the connecting rods is connected with the brake cable, and the connecting rod farthest away from the first connecting rod of the connecting rods is connected with the brake pad.

Further, the driving protection shell is also connected with an operating handle.

Furthermore, one end of the brake cable, which is far away from the brake pad, is connected with a trigger;

the trigger is provided on the operating handle.

Based on the second purpose, the utility model also provides a hedge trimmer, which comprises a machine tool mechanism, a transmission case and the driving device of the hedge trimmer provided by the utility model;

the machine tool mechanism comprises a cutter, the cutter is connected with the driven disc through the transmission case, and the cutter can be driven by the driven disc.

Furthermore, the machine tool mechanism also comprises a blade bracket, a transmission guard plate and a cutter guard plate, wherein the cutter and the cutter guard plate are fixed on the blade bracket;

the box body of transmission case is connected with drive protection casing, the transmission backplate is connected the blade support with between the transmission case.

Furthermore, a damping rubber is arranged between the blade support and the transmission guard plate.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model provides a driving device of a hedge trimmer, which comprises a driving mechanism and a braking mechanism; the driving mechanism comprises a power component and a driven disk driven by the power component; the brake mechanism comprises a brake pad; the brake block is involutory to form the annular that surrounds the periphery of driven disk, and the both ends that the brake block is involutory deviate from each other and extend, and wherein one end that the brake block is involutory extends and forms regulation portion, and the other end that the brake block is involutory extends and forms the fixed part. The driving device of the hedge trimmer of the utility model can freely rotate under the action of the power component and drive the corresponding cutter to work when the brake block is separated from the driven disc through the action of the brake mechanism; when the accelerator is loosened and the cutter is required to stop working, the driven disc can be tightly held and braked by the brake pad. Therefore, when the cutter of the hedge trimmer rotates due to inertia, the braking of the cutter does not depend on only the friction lower pressing plate and the blade support, but the brake disc can directly hold the braking driven disc tightly, the braking mode is short in time and can be used for quickly braking, so that the cutter can stop rotating in a short time, and the potential safety hazard of the blade due to inertia rotation is eliminated.

The utility model provides a hedge trimmer which comprises a machine tool mechanism, a transmission case and a driving device of the hedge trimmer provided by the utility model; the machine tool mechanism comprises a cutter, the cutter is connected with the driven disc through the transmission case, and the cutter can be driven by the driven disc. Compared with the prior art, with the utility model provides a hedge trimmer's drive arrangement has the same beneficial effect, right through the above the utility model discloses hedge trimmer drive arrangement's beneficial effect's description also can audio-visual acquisition, and it is no longer repeated in detail here.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.

Fig. 1 is a schematic view of a driving device of a hedge trimmer according to an embodiment of the present invention;

fig. 2 is an internal schematic view of an operating handle of a driving device of a hedge trimmer according to an embodiment of the present invention;

fig. 3 is a schematic view of a driven plate and a clutch of a driving device of a hedge trimmer according to an embodiment of the present invention;

fig. 4 is an internal schematic view of a driving mechanism of a driving device of a hedge trimmer according to an embodiment of the present invention;

fig. 5 is an enlarged schematic view illustrating the installation of a brake disc and a brake pad of a driving device of a hedge trimmer according to an embodiment of the present invention;

fig. 6 is an external view of a hedge trimmer according to an embodiment of the present invention;

fig. 7 is a schematic view of a partial internal structure of a display driving device of a hedge trimmer according to an embodiment of the present invention.

Icon: 100-a power member; 110-a clutch; 111-clutch carrier; 112-clutch tension spring; 113-clutch kick block; 114-friction plate; 115-a drive aperture; 120-throttle control line; 130-drive protection housing; 132-a limiting piece; 133-shell carrying handle; 140-extinguishing line; 200-operating a handle; 210-a trigger; 220-a control arm; 300-a brake mechanism; 310-brake pads; 311-an adjusting part; 312-a fixed part; 320-brake cable; 330-connecting rod; 340-a brake return spring; 350-a guide rod; 360-pivot; 400-a passive disc; 500-a transmission case; 510-a lifting ring nut; 600-a machine tool mechanism; 610-a cutter; 620-cutter guard plate; 630-a blade holder; 640-a front end operating handle; 650-driving the guard plate.

Detailed Description

The technical solution of the present invention will be described clearly and completely with reference to the accompanying drawings, and obviously, the described embodiments are some, but not all embodiments of the present invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" as appearing herein are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example one

Referring to fig. 1 to 7, the present embodiment provides a driving apparatus of a hedge trimmer, which includes a driving mechanism and a braking mechanism 300.

Wherein the drive mechanism comprises a power member 100 and a passive disc 400 driven by the power member 100. Wherein the power member 100 is disposed in the drive protection housing 130, it may take the form of an engine engaging clutch 110 in the form of gasoline or the like, the clutch 110 enabling connection or disconnection of the engine to or from the driven plate 400. The driven plate 400 is used to connect with the transmission case 500 to transmit power to the cutter 610.

As shown in fig. 1 or 5, the brake mechanism 300 includes a brake pad 310, a brake cable 320, and a brake return spring 340. The brake pads 310 are oppositely arranged to form a ring shape surrounding the periphery of the driven disc 400, two opposite ends of the brake pads 310 are oppositely extended, one ends of the brake pads 310 are oppositely arranged to form an adjusting part 311, and the other ends of the brake pads 310 are oppositely arranged to form a fixing part 312. The fixing portion 312 should be fixedly connected to the driving protection housing 130, i.e. the end of the fixing portion 312 does not move relative to the driving protection housing 130. The brake cable 320 and the brake return spring 340 can be respectively connected with the adjusting part 311, the brake cable 320 is tensioned, and the adjusting part 311 moves along a first direction to enable the brake pad 310 and the driven disc 400 to be in a first state; the brake cable 320 is loosened, and the adjustment part 311 is reset in the second direction when pushed by the brake return spring 340, so that the brake pad 310 and the driven disc 400 are in the second state. The first state and the second state are respectively one of a holding braking state and a separating non-braking state, and the states of the first state and the second state are different. The first direction and the second direction are opposite directions.

It is understood that the brake cable 320 is tensioned, which means that the brake cable 320 is tensioned by an external operating force; the slack of the brake cable 320 refers to a slack state that the brake cable 320 assumes without being subjected to an external operating force. The first state and the second state are different, that is, the first state is a brake state in which the brake pad 310 and the passive disc 400 are held tightly, and the second state is a non-braking state in which the brake pad 310 and the passive disc 400 are separated; or, the first state is a non-braking state in which the brake pad 310 is separated from the passive disc 400, and the second state is a state in which the brake pad 310 is held tightly with the passive disc 400.

The brake pad 310 of the present embodiment can be made of wear-resistant material, and after the brake pad is formed into a ring shape, the brake pad has a certain moving shape in the extending direction of the ring shape, such as thin wear-resistant steel.

The driving device of the embodiment can drive the corresponding cutter 610 to work by the action of the brake mechanism 300, when the brake pad 310 is separated from the driven disc, the driven disc 400 can rotate freely under the action of the power member 100; when the throttle is released and the cutter 610 is required to stop working, the brake pad 310 can be tightly held with the passive disc 400 for braking. Therefore, when the cutter 610 of the hedge trimmer rotates due to inertia, the braking of the cutter does not rely only on friction to press the pressing plate and the blade support, but the brake can directly hold the braking driven plate 400 tightly through the brake block 310, the braking mode is short in time and can be quickly braked, so that the cutter 610 can stop rotating in a short time, and the potential safety hazard of the blade due to inertia rotation is eliminated.

Specifically, the clutch 110 of the present embodiment may be in a form of clutching by centrifugal force, as shown in fig. 3, the clutch 110 includes a clutch holder 111, a clutch kick block 113, a clutch tension spring 112, and a friction plate 114. A driving hole 115 is formed in the middle of the clutch bracket 111, and an output shaft of the engine can be inserted into the driving hole 115 and drive the clutch bracket 111 to rotate; the clutch tension springs 112 include two and are respectively arranged on two sides of the clutch support 111, the clutch kicking blocks 113 include two and are respectively connected to two ends of the clutch tension spring 112, and the friction plates 114 include two arc-shaped plates and are respectively fixed on one side of the clutch kicking blocks 113 away from the clutch tension spring 112.

Corresponding to the form of the clutch 110, when the engine is in a non-working state or a low-speed rotation state, at this time, the centrifugal force applied to the clutch kicking block 113 is smaller than the force of the clutch tension spring 112, the corresponding clutch kicking block 113 is attached to the clutch bracket 111, the diameter of the clutch is minimum, the friction plate 114 is not in contact with the driven plate 400, that is, the driven plate 400 is in a non-working state, and the cutter 610 cannot perform corresponding actions. When the engine is in a high-speed (generally above 4300 rmp) rotating state, the clutch 110 rotates at a high speed along with the output shaft of the engine, the centrifugal force borne by the clutch kicking block 113 is greater than the force of the clutch tension spring 112, a gap is formed between the clutch kicking block 113 and the clutch support 111, correspondingly, the clutch kicking block 113 drives the friction plate 114 to move outwards against the elastic force of the clutch tension spring 112 until the friction plate 114 contacts the driven plate 400, power transmission can be realized at this time, that is, the driven plate 400 drives the cutter 610 to perform corresponding actions.

Continuing to refer to fig. 1-7, the braking mechanism 300 of the driving device of the hedge trimmer of the present embodiment further includes a link 330. The brake cable 320 is connected to the brake pad 310 through a link 330, and the link 330 is rotatably connected to the driving guard housing 130 through a fulcrum 360.

Specifically, the adjusting portion 311 is J-shaped, and a hook end of the J-shape of the adjusting portion 311 is far from the link 330; the driving protection shell 130 is provided with a limiting piece 132, the limiting piece 132 is arranged opposite to the hook end of the adjusting part 311, and a spring accommodating gap is formed between the limiting piece 132 and the hook end of the adjusting part 311; the brake return spring 340 is disposed in the spring receiving space, and the brake return spring 340 is disposed along a connecting line direction between the hook end of the adjusting portion 311 and the limiting plate 132. A guide rod 350 is connected between the connecting rod 330 and the J-shaped hook end of the adjusting portion 311, the guide rod 350 is inserted into the brake return spring 340, and the guide rod 350 is connected with the lower end of the connecting rod 330 at the pivot 360 after sliding through the limiting piece 132. The brake cable 320 is tightened to drive the connecting rod 330 to be far away from the limiting piece 132, the guide rod 350 drives the hook end face of the adjusting part 311 to slide towards the limiting piece 132, the brake return spring 340 is compressed, the ring formed by the brake pad 310 is enlarged, and the brake pad 310 and the driven disc 400 are in a first state, as shown in fig. 1, the first state is a non-holding state, and power transmission can be realized by increasing the rotating speed; the brake cable 320 is loosened, the brake return spring 340 pushes the hook end of the adjusting portion 311 away from the limiting plate 132, the guide rod 350 drives the connecting rod 330 to return, the circumference of the brake pad 310 becomes smaller, and the brake pad 310 and the passive disc 400 are in a second state, which is, for example, a hugging brake state as shown in fig. 1 or 5.

It can be understood that the spring receiving space formed between the hook end of the adjusting portion 311 and the limiting plate 132 and capable of changing in size, in cooperation with the driving of the connection between the guide rod 350 and the connecting rod 330, forms a stable two-state switching mechanism.

It should be noted that, in this embodiment, it is shown that the connecting rod 330 is one, and the connecting rod may include multiple stages hinged in sequence as required, that is, a multi-stage connecting rod is formed by multiple connecting rods hinged in sequence, the brake cable 320 should be connected to the first-stage connecting rod, and the brake pad 310 should be connected to the last-stage connecting rod, where the first-stage connecting rod and the last-stage connecting rod are the connecting rods at the ends of two ends of the multi-stage connecting rod.

It will be appreciated that in the form of multi-stage links, the operating end (the end remote from the links) of the brake cable 320 can undergo a large change in displacement when the brake cable 320 is subjected to a tightening action, and the change in displacement is transmitted to the last-stage link with less change in displacement after the common compensation of the multi-stage links. Therefore, the large displacement change of the brake cable 320 and the small amplitude change of the brake pad are realized, the manual tightening action of the brake cable operating end is facilitated, and the operation is labor-saving; meanwhile, the brake pad 310 has a smaller amplitude in two states, which not only reduces the volume of the brake mechanism 300, but also facilitates the switching of the brake pad 310 in the two states without being damaged due to too large amplitude of change.

As shown in fig. 1, the driving protection housing 130 of the driving device of the hedge trimmer of the present embodiment is further connected with an operating handle 200, the operating handle 200 is provided with a trigger 210, and the trigger 210 is connected with the operating end of the brake cable 320, so that the pulling and loosening states of the brake cable 320 can be switched by pulling the trigger 210.

To achieve synchronous operation of the motor of the drive means and the brake mechanism 300, the throttle control line 120 of the motor may be connected together to the trigger 210. Thus, when the trigger 210 is pulled, the accelerator can be opened and closed and the brake mechanism 300 can be operated at the same time.

It should be noted that the trigger 210 may be controlled by a trigger control arm 220. The trigger 210 controls the brake cable 320 and the accelerator such that when the accelerator is closed, the brake cable 320 is released, and the brake pad 310 and the passive disc 400 are tightly held for braking; when the throttle is opened greatly, the brake cable is tensioned, and the brake pad 310 is separated from the passive disc 400 and is not braked.

Also as shown in fig. 1, the operating handle 200 may be connected to the ignition-off wire 140 to control the engine ignition-off by operating a corresponding switch on the operating handle 200.

The driving device driving protection housing 130 of the hedge trimmer of the present embodiment may also be provided with a housing carrying handle 133 to facilitate carrying the driving device.

The brake cable 320 of the driving device of the hedge trimmer of the present embodiment is connected to the connecting rod 330, and is connected to the brake return spring 340 and the brake pad 310 through the fulcrum 360, when the trigger 210 is pulled, the brake cable 320 drives the brake pad 310 to move, so that the circle formed by the brake pad 310 becomes larger, and the brake pad 310 and the driven disc 400 are separated to start normal operation. When the trigger 210 is in a free state, the brake pad 310 is attached to the outer ring of the passive plate 400, and is in a braking state.

The utility model discloses the beneficial effect who brings does:

1. the brake is carried out in a brake pad mode, so that the brake time is shortened, and the safety performance is improved;

2. the brake pad is made of a steel material which is a wear-resistant material, so that the wear resistance of the brake pad is improved, and the durability is improved.

3. The connecting rod design can be designed into a two-stage or multi-stage connecting rod design, so that the operation force is reduced.

The present embodiment further provides a hedge trimmer including an implement mechanism 600, a transmission case 500 and the driving device of the hedge trimmer provided by the present embodiment. Wherein the implement mechanism 600 includes a cutter 610, the cutter 610 is connected with the driven plate 400 through the transmission case 500, and the cutter 610 can be driven by the driven plate 400.

It should be noted that a series of gears and eccentric wheel conversion are provided in the transmission case 500, and the connection manner can be realized by the prior art, and will not be described in detail herein.

When the driven plate 400 rotates, the transmission case 500 converts the rotation direction of the engine into the reciprocating motion of the cutter 610 in the a-B direction shown in fig. 7 through the conversion of the gears and the eccentric wheels.

Specifically, the implement mechanism 600 further comprises a blade support 630, a transmission guard 650 and a cutter guard 620, wherein the cutter 610 and the cutter guard 620 are fixed on the blade support 630; the body of the transmission case 500 is connected with the driving protection housing 130, the transmission guard 650 is connected between the blade support 630 and the transmission case 500, and a shock-absorbing rubber is disposed between the blade support 630 and the transmission guard 650.

As shown in fig. 7, in order to facilitate the operator to manipulate the action position of the tool, a front end manipulating handle 640 may be mounted on the driving guard 650, and an eyenut 510 may be mounted on the driving box 500.

It should be noted that the front end handle grip 640, the handle grip 200, and the case body carrying handle 133 may be made of rubber, respectively, to provide comfort.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; although the present invention has been described in detail with reference to the foregoing embodiments, it should be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention.

Claims

1. The driving device of the hedge trimmer is characterized by comprising a driving mechanism and a braking mechanism;

the second direction is opposite to the first direction; the first state and the second state are respectively one of a holding braking state and a separating non-braking state, and the first state is different from the second state.

2. The driving apparatus of a hedge trimmer according to claim 1, wherein the brake mechanism further comprises a brake cable and a brake return spring;

3. The driving apparatus of claim 2, further comprising a drive protection housing, wherein the driving mechanism, the brake pad, and the brake return spring are disposed within the drive protection housing.

4. The driving device of a hedge trimmer according to claim 3, characterized in that the brake cable is connected to the brake pad by a link, the adjusting part is J-shaped, and the hook end of the J-shape of the adjusting part is far away from the link;

5. The driving apparatus of a hedge trimmer according to claim 2, wherein the brake mechanism further comprises a plurality of links, the plurality of links being sequentially articulated;

6. The driving apparatus of a hedge trimmer according to claim 3, wherein an operating handle is further connected to the driving protection housing.

7. The driving device of a hedge trimmer according to claim 6, characterized in that a trigger is connected to the brake cable at an end thereof away from the brake pad;

the trigger is provided on the operating handle.

8. A hedge trimmer characterized in that the hedge trimmer comprises an implement mechanism, a transmission case and a driving device of the hedge trimmer according to any one of claims 1 to 7;

9. The hedge trimmer of claim 8, wherein the implement mechanism further comprises a blade support, a drive guard, and a blade guard, the blade and the blade guard being secured to the blade support;

10. A hedge trimmer according to claim 9, wherein a damping rubber is provided between the blade support and the drive guard.