CN110959363A - Safe high-efficient gardens trimming means - Google Patents

Abstract

The invention relates to a safe and efficient garden pruning device which comprises a rack, wherein the rack is provided with a gear box, an upper bevel gear and a lower bevel gear which correspond up and down are arranged in the gear box, and the gear box is also provided with a driving gear which drives the upper bevel gear and the lower bevel gear simultaneously; the lower bevel gear extends downwards to form an outer transmission shaft, the upper bevel gear is fixedly connected with an inner transmission shaft, the end of the outer transmission shaft is connected with an upper chain wheel, the end of the inner transmission shaft is connected with a lower chain wheel, the upper chain wheel and the lower chain wheel are respectively connected with a chain, and the chain is uniformly provided with a plurality of cutters. Form the shearing between the cutter of upper and lower chain during rotation, even meet stereoplasm debris and can push it open, avoid stereoplasm debris to sputter, go up the circulation rotation between chain and the lower chain moreover, can make the cutter form continuous shearing, it is efficient, the accessible is adjusted driving motor rotational speed and is controlled cutter shearing speed according to actual need, and the suitability is strong.

Description

Safe high-efficient gardens trimming means

Technical Field

The invention relates to the field of garden machinery, in particular to a safe and efficient garden trimming device.

Background

The garden pruning device is commonly provided with a mower and a hedge trimmer, wherein the mower is also called a weeder, a grass mower, a lawn trimmer and the like, and the hedge trimmer is also called a hedge trimmer, and is suitable for the professional pruning in the garden greening aspects such as tea leaf trimming, parks, gardens, roadside hedges and the like.

The mower is a mechanical tool for trimming lawn and vegetation, and is composed of cutter head, engine, walking wheels, walking mechanism, blades, handrail and control unit. The cutter head is arranged on the travelling wheel, the engine is arranged on the cutter head, the blade is arranged on the output shaft of the engine, the blade is greatly improved in speed by utilizing the high-speed rotation of the engine, the operation time of weeding workers is saved, and a large amount of manpower resources are reduced.

If chinese patent No. 201721599101.0 ", the patent name is" hedge trimmer ", disclose a hedge trimmer, including stationary blade, moving blade and drive the engine that the moving blade slided, still including be fixed in the backup pad at stationary blade both ends, both ends respectively with backup pad swing joint's baffle and perpendicular connection the backup pad and with the bottom plate that the moving blade is pressed close to, all be equipped with on the baffle both sides and make the baffle be in handing-over positioning mechanism of bottom plate both sides upset.

The shearing mechanism of the mower and the hedge trimmer have commonality, and the same effect can be achieved by installing the shearing mechanism of the hedge trimmer on the mower. There is a serious problem with the cutting mechanism of either the existing mower or hedge trimmer. The lawn mower drives the blade to rotate at a high speed through the cutter head to realize cutting, and when hard substances such as broken stones or iron sheets exist on the lawn, the blade rotating at a high speed can easily hit the hard substances, and if personnel in front of the lawn mower pass through the blade, the personnel can be easily injured, so that great potential safety hazards exist. The hedge trimmer drives the movable blade to move back and forth through the engine, so that shearing is formed between the movable blade and the fixed blade, the shearing speed is low, the working strength of workers is improved, if the movable blade and the fixed blade adopt single-side cutting edges, effective shearing cannot be realized when the back knife surface is tangent, the problem of shearing omission also exists, and the efficiency is low.

Disclosure of Invention

In order to solve the problems, the invention adopts the following technical scheme: a safe and efficient garden pruning device comprises a rack, wherein the rack is provided with a gear box, an upper bevel gear and a lower bevel gear which correspond up and down are arranged in the gear box, the gear box is also provided with a driving gear which drives the upper bevel gear and the lower bevel gear simultaneously, and the driving gear is connected with a driving motor which drives the driving gear to run; lower bevel gear downwardly extending has outer transmission shaft, go up helical gear fixedly connected with inner drive shaft, inner drive shaft downwardly extending pass down bevel gear and outer transmission shaft and with lower bevel gear and outer transmission shaft rotatable coupling, outer transmission shaft end connection has the last sprocket, inner drive shaft end connection has the lower sprocket, it is connected with the chain respectively to go up sprocket and lower sprocket, the chain evenly is provided with a plurality of cutters, the cutter is the Z type, and cutter bottom one side is provided with the cutting edge, goes up the cutter cutting edge opposite direction that the chain that sprocket and lower chain took turns to is connected.

When the cutting device works, the driving gear is meshed with the upper helical gear and the lower helical gear respectively to drive the upper helical gear and the lower helical gear to rotate in opposite directions, the chains connected with the upper chain wheel and the lower chain wheel rotate in opposite directions, and shearing is formed between the cutters connected with the upper chain wheel and the lower chain wheel, so that the cutting effect is realized.

Preferably, a supporting plate is arranged on the lower portion of the rack and on the side opposite to the driving motor, an upper machine plate, a lower machine plate and a cover plate are sequentially arranged below the supporting plate, the supporting plate and the cover plate are connected through locking screws, a bending portion is arranged at one end of the cover plate, and the bending portion is fixedly connected with the rack through fixing screws.

The cover plate is fixedly connected with the frame through the fixing screws to form a whole, and the upper machine plate and the lower machine plate are connected, clamped and fixed through the locking screws between the supporting plate and the cover plate, so that an integral stable structure is formed.

Preferably, an arc-shaped portion is arranged at one end, far away from the rack, of the upper machine plate, a through groove extending towards the other end of the upper machine plate is formed in the inner side of the arc-shaped portion, chain grooves communicating the through groove and the other end of the upper machine plate are formed in the middle of the two sides of the upper machine plate along the length direction of the upper machine plate, and transition wheels are arranged in the through groove.

Set up arc portion, set up logical groove and at logical inslot and set up excessive wheel in arc portion inboard, the chain can be connected with excessive wheel when passing through, makes things convenient for the chain more smoothly excessive, and setting up in chain groove is used for holding the chain, carries on spacingly to the chain, prevents its shake skew.

Preferably, the transition wheel comprises a transition chain wheel and a support shaft in rolling connection with the center of the transition chain wheel, the upper end and the lower end of the support shaft are respectively embedded into the upper surface and the lower surface of the through groove, the support shaft and the upper plate are fixedly connected through fixing pins penetrating through the support shaft and the upper plate, and the number of the fixing pins connected with the support shaft is three.

Both ends imbed logical groove upper and lower two sides respectively about the back shaft and are used for accurate location, and the rethread pin is fixed the back shaft, and the excessive sprocket and the back shaft roll connection of being connected with the chain, the excessive wheel of stroke.

Preferably, the chain inslot still is seted up and is used for holding the cutter groove of cutter tip, lead to the groove upper and lower two sides and be provided with the constant head tank that is used for holding the supporting shaft tip respectively.

Set up the constant head tank and be used for holding back shaft upper and lower both ends and carry out accurate location to it, the setting in cutter groove can hold the surplus after cutter and chain are connected, and this surplus is just for carrying on spacingly to the cutter with the setting in cutter groove simultaneously, prevents that the cutter from excessively shaking at the shearing in-process, makes its can the steady operation.

Preferably, an adjusting through groove is formed in the joint of the upper machine plate and the locking screw.

The adjusting through groove is a strip-shaped groove which is consistent with the length direction of the upper machine plate, and the front and back positions of the upper machine plate can be adjusted by adjusting the through groove to adjust the tightness of the chain.

Preferably, at least two positions of the upper plate are connected with the supporting plate and the cover plate through locking screws.

Set up two at least locking screw junctions for the connection of last machine board and backup pad is more stable.

Preferably, the lower machine plate is consistent with the upper machine plate in structure.

Go up the aircraft apron unanimous with the structure of lower aircraft apron, same locking screw can lock the location to last aircraft apron and lower aircraft apron simultaneously, owing to adjust logical groove and be the bar groove, can adjust alone last aircraft apron or lower aircraft apron on this basis in addition to this elasticity of adjusting the chain that the aircraft apron and lower aircraft apron held alone, the cutter is more smooth and easy when the cutting.

Preferably, an upper bearing is arranged at the joint of the upper bevel gear and the gear box, and a positioning table is arranged at the joint of the inner transmission shaft and the lower end of the upper bevel gear.

Preferably, an inner bearing is arranged at the joint of the upper end of the lower bevel gear and the inner transmission shaft, and an outer bearing is arranged at the joint of the lower end of the lower bevel gear and the gear box.

The invention has the beneficial effects that:

according to the invention, the upper chain and the lower chain are driven by the upper helical gear and the lower helical gear to respectively rotate along opposite directions, the Z-shaped cutters are respectively arranged on the chains, and the cutting edges of the cutters connected with the chains on the upper chain wheel and the lower chain wheel are opposite in direction, so that shearing is formed between the cutters of the upper chain and the lower chain when the chains rotate.

Drawings

The figures further illustrate the invention, but the examples in the figures do not constitute any limitation of the invention.

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic view of the rack structure of the present invention.

FIG. 3 is a schematic view of the connection structure of the upper helical gear and the lower helical gear of the present invention.

FIG. 4 is a schematic view of the internal structure of the gear box of the present invention.

Fig. 5 is a schematic diagram of an upper plate structure according to the present invention.

Fig. 6 is a schematic view of another angle structure of the upper plate according to the present invention.

Fig. 7 is a schematic view of the connection structure of the transition wheel at the end of the upper plate according to the present invention.

Fig. 8 is a schematic view of a transition wheel structure of the present invention.

Fig. 9 is a schematic view of a cutter coupling structure according to the present invention.

Fig. 10 is a schematic view of the structure of the cutter according to the present invention.

Detailed Description

As shown in fig. 1-10, a safe and efficient garden pruning device according to an embodiment of the present invention includes a frame 1, the frame 1 is provided with a gear box 2, an upper bevel gear 3 and a lower bevel gear 4 are disposed in the gear box 2, the gear box 2 is further provided with a driving gear 5, the driving gear 5 is engaged with the upper bevel gear 3 and the lower bevel gear 4 respectively and drives the upper bevel gear 3 and the lower bevel gear 4 simultaneously, and the driving gear 5 is connected to a driving motor 6 for driving the driving gear to operate; the lower bevel gear 4 extends downwards to form an outer transmission shaft 7, the upper bevel gear 3 is fixedly connected with an inner transmission shaft 8, the inner transmission shaft 8 extends downwards to extend through the lower bevel gear 4 and the outer transmission shaft 7 and is rotatably connected with the lower bevel gear 4 and the outer transmission shaft 7, a shaft and shaft sleeve connection is formed between the inner transmission shaft 8 and the outer transmission shaft 7, the end part of the outer transmission shaft 7 is connected with an upper chain wheel 9, the end part of the inner transmission shaft 8 is connected with a lower chain wheel 10, and the upper chain wheel 9 and the lower chain wheel 10 are respectively connected with a chain 11, so that when the driving motor 6 drives, the upper bevel gear 3 and the lower bevel gear 4 rotate in opposite directions to drive the chains 11 connected with the upper chain wheel 9 and the lower chain wheel 10 to rotate in opposite directions; the chain 11 is evenly provided with a plurality of cutters 12, the cutters 12 are Z-shaped, one side of the bottom of each cutter 12 is provided with a cutting edge 13, and the directions of the cutting edges of the cutters 12 connected with the chain 11 on the upper chain wheel 9 and the lower chain wheel 10 are opposite. The cutter 12 is Z-shaped, the end faces of the ends of the cutter 12, which are connected with the chain 11 of the upper chain wheel 9 and the lower chain wheel 10 and are provided with the blades 13 are abutted, and the cutter 12 between the upper part and the lower part respectively forms shearing under the driving of the upper chain wheel 9 and the lower chain wheel 10 in opposite directions due to the opposite directions of the blades 13. The shearing action is different from the blade rotation of the conventional mower, and the hard fragments can be pushed away under the shearing force even if the hard fragments in front cannot be sheared short under the shearing action, so that the splashing cannot be caused; the speed of shearing also depends on driving motor 6's rotational speed, can control shear rate through the rotational speed of control driving motor 6, because last sprocket 9 forms a circulation respectively with chain 11 that lower sprocket 10 is connected, cutter 12 can form continuous stable high-speed shearing when chain 11 rotates, compare in the shearing mode that conventional hedge trimmer passed through the movable blade and made a round trip to slide and the stationary blade forms, its shearing efficiency is higher, the difficult condition of cutting that leaks that appears, the shearing effect is better.

The lower portion of the rack 1 is provided with a supporting plate 14 on the side opposite to the driving motor 6, an upper machine plate 15, a lower machine plate 16 and a cover plate 17 are sequentially arranged below the supporting plate 14, the supporting plate 14 is connected with the cover plate 17 through a locking screw 18, one end of the cover plate 17 is provided with a bending portion 19, and the bending portion 19 is fixedly connected with the rack 1 through a fixing screw 20. The supporting plate 14, the upper plate 15, the lower plate 16 and the cover plate 17 are overlapped from top to bottom, and then are locked and fixed through the locking screws 18, and the cover plate 17 is fixedly connected with the rack 1 through the fixing screws 20, so that the connection stability of the upper plate 15 and the lower plate 16 is further strengthened.

An arc-shaped portion 21 is arranged at one end, far away from the rack, of the upper machine plate 15, a through groove 22 extending to the other end of the upper machine plate 15 is arranged on the inner side of the arc-shaped portion 21, a chain groove 23 communicating the through groove 22 with the other end of the upper machine plate 15 is formed in the middle of the two sides of the upper machine plate 15 along the length direction of the middle portion, and a transition wheel 24 is arranged in the through groove 22. The chain 11 of going up sprocket 9 is when rotating with last board 15 as the support, the chain groove 23 that last board 15 was seted up is used for holding chain 11 promptly, it is spacing to chain 11, prevent that it from excessively trembling to influence the shearing, and the setting of arc portion 21 just is in order to make chain 11 better smoothly excessive at last board 15 tip, the inside logical groove 22 that sets up of arc portion 21 is fine prevents chain 11 and last board 15 tip friction, it is connected with chain 11 to have set up excessive wheel 24 in logical groove 22 and makes chain 11 excessively more smooth and easy.

The transition wheel 24 comprises a transition chain wheel 25 and support shafts 26 connected with the center of the transition chain wheel 25 in a rolling manner, the upper end and the lower end of each support shaft 26 are respectively embedded into the upper surface and the lower surface of the through groove 22, the support shafts 26 and the upper plate 15 are fixedly connected through fixing pins 27 penetrating through the support shafts 26 and the upper plate 15, and the number of the fixing pins 27 connected with the support shafts 26 is three. Excessive wheel 24 is connected with chain 11 through excessive sprocket 25, and excessive sprocket 25 uses back shaft 26 as the center rather than roll connection, and both sides form accurate location about the logical groove 22 is embedded to back shaft 26 both ends, and rethread fixed pin 27 makes back shaft and last board 15 firm connection, and three fixed pin 27 are the steadiness of strengthening the connection more.

The chain groove 23 is also provided with a cutter groove 28 for accommodating the end of the cutter 12, and the upper and lower surfaces of the through groove 22 are respectively provided with a positioning groove 29 for accommodating the end of the support shaft 26. The cutter 12 is connected with the chain 11 and the end part is provided with a section of allowance, the allowance is accommodated by the cutter groove 28, the cutter groove 28 limits the allowance, so that the cutter 12 is prevented from shaking too much to affect cutting when rotating, and the positioning grooves 29 are arranged for accurately positioning the two ends of the supporting shaft 26.

An adjusting through groove 30 is arranged at the joint of the upper machine plate 15 and the locking screw 18. The upper machine plate 15 is connected with the support plate 14 and the cover plate 17 at least two positions through locking screws 18.

The lower plate 15 is identical in structure to the upper plate 16.

Considering that although the upper helical gear 3 and the lower helical gear 4 are driven by the driving gear 5 at the same time, in the actual use process, the loss of parts and the uncontrollable error existing in the synchronism between the upper chain wheel 3 and the lower chain wheel 4 when the driving motor 6 runs at a high speed are considered, even the cutting speeds required by different objects to be cut are different, and under the condition that the rotating speed of the driving motor 6 is changed, in order to better coordinate the synchronism between the upper chain wheel 9 and the lower chain wheel 10, the front and back positions of the upper machine plate 15 and the lower machine plate 16 need to be finely adjusted, so that the tightness of the chain 11 is more suitable for the current rotating speed. The upper machine plate 15 and the lower machine plate 16 have the same structure, are easier to adjust during installation and adjustment, and are beneficial to keeping the positions of the chains 11 of the upper machine plate 15 and the lower machine plate 16 corresponding up and down.

An upper bearing 31 is arranged at the joint of the upper bevel gear 3 and the gear box 2, and a positioning table 32 is arranged at the joint of the inner transmission shaft 8 and the lower end of the upper bevel gear 3.

An inner bearing 33 is arranged at the joint of the upper end of the lower bevel gear 4 and the inner transmission shaft 8, and an outer bearing 34 is arranged at the joint of the lower end of the lower bevel gear 4 and the gear box 2.

The rotation directions of the upper helical gear 3 and the lower helical gear 4 are opposite, and the inner transmission shaft 8 passes through the inner part of the outer transmission shaft 7, so that the upper helical gear 3 and the lower helical gear 4 do not interfere with each other when rotating respectively, and a bearing is needed for control. The upper bearing 31 is arranged at the joint of the upper bevel gear 3 and the gear box 2, the outer bearing 34 is arranged at the joint of the lower end of the lower bevel gear 4 and the gear box 2, the upper bevel gear 3 is fixedly connected with the inner transmission shaft 5, so that the positioning table 32 is arranged to position the upper bevel gear 3, a fixed distance between the upper bevel gear 3 and the lower bevel gear 4 is ensured, the rotation direction of the lower bevel gear 4 and the inner transmission shaft 8 is opposite, and the inner bearing 33 is arranged at the joint of the upper end of the lower bevel gear 4 and the inner transmission shaft 8.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims (10)

1. The utility model provides a safe high-efficient gardens trimming means which characterized in that: the gear box is also provided with a driving gear which simultaneously drives the upper helical gear and the lower helical gear, and the driving gear is connected with a driving motor which drives the driving gear to run; lower bevel gear downwardly extending has outer transmission shaft, go up helical gear fixedly connected with inner drive shaft, inner drive shaft downwardly extending pass down bevel gear and outer transmission shaft and with lower bevel gear and outer transmission shaft rotatable coupling, outer transmission shaft end connection has the last sprocket, inner drive shaft end connection has the lower sprocket, it is connected with the chain respectively to go up sprocket and lower sprocket, the chain evenly is provided with a plurality of cutters, the cutter is the Z type, and cutter bottom one side is provided with the cutting edge, goes up the cutter cutting edge opposite direction that the chain that sprocket and lower chain took turns to is connected.

2. The safe and efficient garden pruning device according to claim 1, wherein: the improved automatic feeding machine is characterized in that a supporting plate is arranged on one side, opposite to the driving motor, of the lower portion of the rack, an upper machine plate, a lower machine plate and a cover plate are sequentially arranged below the supporting plate, the supporting plate is connected with the cover plate through locking screws, a bent portion is arranged at one end of the cover plate, and the bent portion is fixedly connected with the rack through fixing screws.

3. The safe and efficient garden pruning device according to claim 2, characterized in that: the chain groove is formed in the middle of the two sides of the upper plate along the length direction of the chain groove, and the chain groove is communicated with the through groove and the other end of the upper plate, and the through groove is internally provided with a transition wheel.

4. The safe and efficient garden pruning device according to claim 3, wherein: the transition wheel comprises a transition chain wheel and a support shaft in rolling connection with the center of the transition chain wheel, the upper end and the lower end of the support shaft are respectively embedded into the upper surface and the lower surface of the through groove, the support shaft and the upper plate are fixedly connected through fixing pins penetrating through the support shaft and the upper plate, and the number of the fixing pins connected with the support shaft is three.

5. The safe and efficient garden pruning device according to claim 4, wherein: the chain inslot still sets up the cutter groove that is used for holding the cutter tip, two sides are provided with the constant head tank that is used for holding the supporting shaft tip respectively about leading to the groove.

6. The safe and efficient garden pruning device according to claim 5, wherein: and an adjusting through groove is formed at the joint of the upper machine plate and the locking screw.

7. The safe and efficient garden pruning device according to claim 6, wherein: the upper plate is connected with the support plate and the cover plate at least two positions through locking screws.

8. The safe and efficient garden pruning device according to claim 7, wherein: the lower machine plate is consistent with the upper machine plate in structure.

9. The safe and efficient garden pruning device according to claim 1, wherein: an upper bearing is arranged at the joint of the upper helical gear and the gear box, and a positioning table is arranged at the joint of the inner transmission shaft and the lower end of the upper helical gear.

10. The safe and efficient garden pruning device according to claim 1, wherein: an inner bearing is arranged at the joint of the upper end of the lower bevel gear and the inner transmission shaft, and an outer bearing is arranged at the joint of the lower end of the lower bevel gear and the gear box.

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