Axial collinear garden machine capable of being spliced

Abstract

The invention discloses an axial collinear garden machine capable of being spliced, which belongs to the field of garden machines and comprises a power part, a transmission rod part and a machine head part which are connected in sequence. According to the core design, the power output end, the transmission rod, the machine head input end and the operation tool are coaxially arranged, eccentric torque is eliminated, and operation stability is improved; the transmission rod part is formed by inserting a plurality of sections of transmission rods into sockets through necking plugs, quick splicing and looseness prevention are realized by matching with quick hoops, and the length can be flexibly adjusted; the machine head part can be switched into a chain saw or a hedge trimmer, and power steering is achieved through a gear assembly. The problems that an existing high branch machine is unstable in operation and non-adjustable in length are solved, and the high branch machine has the advantages of being high in stability, efficient in adjustment and good in universality and is suitable for various high branch garden operations.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of garden machinery, and particularly relates to a splicable garden machinery suitable for high-branch pruning operation, and in particular to an axial collinear garden machinery capable of improving operation stability through axial collinear design and length adjustment through splicing structure. BACKGROUND

[0002] In the scenarios of garden maintenance and fruit tree pruning, high-branch operation (such as high-branch hedge pruning and high-branch tree sawing) is completed by special garden machinery. Existing high-branch garden machinery is mainly divided into two categories: 1. Telescopic rod structure: the operation head of a chain saw, a hedge trimmer and the like is directly installed at the end of a telescopic rod, and the telescopic rod is used to extend the operation radius. The core defect of this structure is that the center of gravity moves upward, that is, the power part and the operation head are located at a high position, and the operator needs to bear a large torque, which is easy to cause fatigue after long-time operation, and the operation flexibility is poor.

[0003] 2. Transmission extension structure: the power part (such as an engine or a motor) is retained at the lower position, and the power is transmitted to the operation head at the high position through a transmission rod and a gear box, so that the center of gravity is effectively lowered. However, this structure still has the following key technical defects: Axial misalignment problem: as shown in the “high-branch machine rotating positioning device” disclosed in Chinese Patent CN211960184U, the operation cutter (hedge trimmer blade and chain saw guide plate) is not on the same axis as the transmission rod and the power output end, forming an “eccentric structure”. When the operator applies force, the eccentric torque is easy to cause the head to rotate, the holding is unstable, and even the head is easy to slip out of control, which has serious safety hazards; Length fixing problem: the transmission rod is mostly of an integral structure, and the length cannot be adjusted, so that it cannot adapt to different operation requirements of different heights (such as switching between pruning of low shrubs and tall trees), and the versatility is poor; some adjustable structures adopt threaded connection, and the adjustment efficiency is low, and the threads are easy to loosen due to vibration, and the reliability is insufficient.

[0004] In order to solve the problems of unstable operation and fixed length in the prior art, the present application provides an axial collinear and quickly splicable garden machinery, which takes into account the operation safety and the use flexibility. SUMMARY

[0005] The present application aims to overcome the defects of unstable operation caused by axial misalignment of the existing high-branch garden machinery and poor versatility caused by fixed length of the transmission rod, and provides an axial collinear and splicable garden machinery, which eliminates the eccentric torque through axial collinear design of the whole link of “power-transmission-operation”, realizes length adjustment through quick splicing of multiple transmission rods, and improves the operation safety and the scene adaptability.

[0006] The above-mentioned objective of the present invention is achieved through the following technical solution: a splicable axially collinear garden machine, comprising a power unit, a transmission rod unit, and a machine head unit. The power unit is provided with an output end, and the machine head unit is provided with an input end and a working tool. The output end of the power unit is connected to the rear end of the transmission rod unit, and the front end of the transmission rod unit is connected to the input end of the machine head unit. The output end of the power unit, the transmission rod unit, the input end of the machine head unit, and the working tool are all coaxially arranged to form a unified central axis.

[0007] Furthermore, the machine head is divided into a chainsaw or a hedge trimmer; when the machine head is a chainsaw, the working blades are chainsaw guide plates and chainsaw chains; when the machine head is a hedge trimmer, the working blades are hedge trimming blades.

[0008] Furthermore, the input end of the machine head is connected to the working tool via a gear assembly; the gear assembly includes a driving bevel gear, an intermediate gear, and a driven gear. The central shaft of the driving bevel gear is fixed coaxially with the input end, used to convert the axial rotational power transmitted by the transmission rod into lateral power; the intermediate gear and the driven gear are both spur gears. A transmission bevel gear is provided on the shaft of the intermediate gear. The transmission bevel gear meshes with the driving bevel gear, and the intermediate gear meshes with the driven gear. The driven gear is fixed to the drive shaft of the working tool, realizing the lateral transmission of power and adapting to the lateral operation requirements of chainsaws and hedge trimmers.

[0009] Furthermore, the transmission rod portion includes at least two transmission rod sections and a quick clamp; The transmission rod includes an outer tube and an inner rod, and the outer tube and the inner rod are connected and fixed by a bearing to ensure that the inner rod can rotate freely in the outer tube and be axially positioned. One end of the inner rod is provided with a non-circular socket, and the other end is provided with a non-circular plug that matches the non-circular socket; the non-circular socket and the non-circular plug are used to transmit torque; One end of the outer tube is provided with a constricted plug and the other end is provided with a socket. When adjacent transmission rods are spliced, the constricted plug of the previous transmission rod is inserted into the socket of the next transmission rod. The insertion point of the transmission rod (the mating position between the constricted plug and the insertion port) is tightened and fixed by a quick clamp.

[0010] Furthermore, the socket portion is provided with an axially extending notch, giving the socket portion radial shrinkage elasticity, which facilitates a tight fit with the shrink plug portion when the clamp is quickly tightened.

[0011] Furthermore, the constricted plug portion and the insertion portion are provided with corresponding positioning holes; the inner wall of the quick clamp is provided with anti-disengagement pins that match the positioning holes; when the quick clamp is tightened, the anti-disengagement pins are embedded in the positioning holes, forming a dual positioning in both the circumferential and axial directions, preventing the transmission rod from loosening after splicing.

[0012] The advantages of this invention compared to the prior art are: 1. Significantly improved operational stability: The power output end, transmission rod, machine head input end, and working tool are coaxially set, eliminating the "eccentric torque" of the existing structure. When the operator applies force, the force is transmitted along the axis without additional rotational torque, avoiding machine head slippage and loss of control, and significantly reducing safety risks. At the same time, the center of gravity is concentrated on the axis, making operation less strenuous and significantly reducing fatigue during long-term operation.

[0013] 2. Flexible and efficient length adjustment: The transmission rod adopts a "multi-section splicing + quick clamp" structure, which realizes rapid torque transmission through non-circular plugs / sockets. The notch design and anti-loosening pins enable quick locking and anti-loosening. The splicing / disassembly operation is convenient, and the total length of the transmission rod can be flexibly adjusted according to the working height, making it suitable for all kinds of operations from low shrubs to tall trees.

[0014] 3. High Transmission Reliability: The inner rod and outer tube are connected by bearings, ensuring smooth rotary transmission; the non-circular plug-in structure ensures stable torque transmission; the quick-release clamp's anti-loosening pins cooperate with the positioning holes to effectively withstand axial tension and vibration during operation, preventing loosening at the joint. The driving bevel gear uses bevel gears, which can efficiently convert axial power to lateral force, resulting in high reversing efficiency and low power loss; the intermediate gear and driven gear use spur gear meshing, combined with a three-stage transmission structure, which is smoother than direct reversing, reduces impact and noise during operation, and extends the service life of the machine head and cutters.

[0015] 4. High versatility: The head unit can be switched to a chainsaw or a hedge trimmer, and power steering is achieved through a gear assembly. It can complete both sawing and trimming operations without replacing the entire equipment, reducing equipment procurement costs. The transmission rod adopts a standardized design, and transmission rods of different lengths can be interchanged and spliced, making maintenance convenient. Attached Figure Description

[0016] The accompanying drawings, which are included to provide a further understanding of the invention and form part of this application, illustrate exemplary embodiments of the invention and, together with their description, serve to explain the invention and do not constitute an undue limitation thereof. In the drawings: Figure 1 This is a schematic diagram of the structure of the present invention.

[0017] Figure 2 yes Figure 1 Cross-sectional view at point AA.

[0018] Figure 3 This is a schematic diagram of the external structure of the transmission rod in this invention.

[0019] Figure 4 This is a schematic diagram of the internal structure of the transmission rod in this invention.

[0020] Figure 5 This is a schematic diagram of the quick clamp structure in this invention.

[0021] Figure 6 This is a schematic diagram of the head section in this invention.

[0022] Explanation of reference numerals in the attached drawings: 1-Power unit, 11-Output end; 2-Transmission rod part, 21-Transmission rod, 211-Outer tube, 2111-Reduced plug part, 2112-Socket part, 2113-Notch, 212-Inner rod, 2121-Non-circular socket, 2122-Non-circular plug, 213-Bearing, 214-Positioning hole, 22-Quick clamp, 221-Anti-disengagement pin; 3-Head unit, 31-Input end, 32-Working tool, 33-Gear assembly, 331-Drive bevel gear, 332-Transmission bevel gear, 333-Intermediate gear; 334-Driven gear; 335-Rotating shaft; 336-Drive shaft; OO-Central axis. Detailed Implementation

[0023] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to specific embodiments and the accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of the invention. Furthermore, descriptions of well-known structures and techniques are omitted in the following description to avoid unnecessarily obscuring the concept of the invention.

[0024] like Figures 1 to 6 As shown, a modular, axially collinear garden machine includes a power unit 1, a transmission rod unit 2, and a head unit 3. The power unit 1 has an output end 11, and the head unit 3 has an input end 31 and a working blade 32. The head unit 3 is a chainsaw or a hedge trimmer. When the head unit 3 is a chainsaw, the working blade 32 is a chainsaw guide plate and a saw chain. When the head unit 3 is a hedge trimmer, the working blade 32 is a hedge trimming blade.

[0025] The output end 11 of the power unit 1 is connected to the rear end of the transmission rod part 2, and the front end of the transmission rod part 2 is connected to the input end 31 of the machine head part 3. The output end 11 of the power unit 1, the transmission rod part 2, the input end 31 of the machine head part 3, and the working tool 32 are all coaxially arranged to form a unified central axis OO.

[0026] The transmission rod section 2 includes at least two transmission rod sections 21 and a quick clamp 22; the transmission rod 21 includes an outer tube 211 and an inner rod 212, the outer tube 211 and the inner rod 212 are connected and fixed by a bearing 213 to ensure that the inner rod 212 can rotate freely and be axially positioned within the outer tube 211; one end of the inner rod 212 is provided with a non-circular socket 2121, which can be polygonal, elliptical, splined, etc., and the other end is provided with a non-circular plug that matches the non-circular socket 2121. 2122; The non-circular socket 2121 and non-circular plug 2122 are used to transmit torque; one end of the outer tube 211 is provided with a constricted plug portion 2111, and the other end is provided with a socket portion 2112; when adjacent transmission rods 21 are spliced, the constricted plug portion 2111 of the previous transmission rod is inserted into the socket portion 2112 of the next transmission rod; the insertion point of the transmission rod 21 (the mating position of the constricted plug portion 2111 and the socket portion 2112) is tightened and fixed by a quick clamp 22. The socket portion 2112 is provided with an axially extending notch 2113, so that the socket portion 2112 has radial shrinkage elasticity, which facilitates a tight fit with the constricted plug portion 2111 when the quick clamp 22 is tightened. The constricted plug portion 2111 and the insertion portion 2112 are provided with corresponding positioning holes 214; the inner wall of the quick clamp 22 is provided with an anti-disengagement pin 221 that matches the positioning hole 214; when the quick clamp 22 is tightened, the anti-disengagement pin 221 is embedded in the positioning hole 214, forming a dual positioning in both the circumferential and axial directions, preventing the transmission rod 21 from loosening after splicing.

[0027] The input end 31 of the machine head part 3 is connected to the working tool 32 via a gear assembly 33. The gear assembly 33 includes a driving bevel gear 331, an intermediate gear 333, and a driven gear 334. The central axis of the driving bevel gear 331 is fixed coaxially with the input end 31 and is used to convert the axial rotational power transmitted by the transmission rod into lateral power. The intermediate gear 333 and the driven gear 334 are both spur gears. A transmission bevel gear 332 is provided on the rotating shaft 335 of the intermediate gear 333. The transmission bevel gear 332 meshes with the driving bevel gear 331, and the intermediate gear 333 meshes with the driven gear 334. The driven gear 334 is fixed to the drive shaft 336 of the working tool 32 to realize the lateral transmission of power and adapt to the lateral operation requirements of chainsaws and hedge trimmers.

[0028] Specific implementation of the present invention: I. Component Selection and Assembly: 1. Power section 1: It adopts a gasoline engine or AC motor, whose output end 11 is adapted to the non-circular socket 2121 of the inner rod 212 of the transmission rod section 2, and the power is transmitted through the adaptation structure.

[0029] 2. Transmission rod part 2: The outer tube 211 is made of lightweight, high-strength metal tubing. The outer diameter of the constricted plug part 2111 is slightly smaller than that of the outer tube body, and the inner diameter of the socket part 2112 is slightly larger than that of the outer tube body. The socket part has axial notches 2113 evenly distributed around its circumference. The inner rod 212 is made of high-strength steel, and the cross-sectional shape of the non-circular socket 2121 matches that of the plug 2122 to ensure torque transmission. Bearing 213 is a deep groove ball bearing, which is fixed between the outer tube 211 and the inner rod 212 by interference fit; The anti-disengagement pin 221 of the quick clamp 22 is adapted to the positioning hole 214.

[0030] 3. Nose section 3: When it is a chainsaw: the working tool 32 is the chainsaw guide plate and the saw chain; in the gear assembly 33, the driving bevel gear 331 is a bevel gear, and its cone surface meshes with the tooth surface of the transmission bevel gear 332 on the fixed intermediate gear 333 shaft to achieve 90° power reversal; the intermediate gear 333 and the driven gear 334 are spur gears with the same module, which transmit lateral power through parallel shaft meshing to drive the saw chain to rotate. When used as a hedge trimmer: the working blade 32 is a hedge trimming blade; the gear assembly 33 also adopts the structure of "active bevel gear + spur cylindrical intermediate / driven gear", which converts axial power into lateral power through three-stage transmission, adapts to the reciprocating trimming action of the blade, and ensures smooth transmission.

[0031] II. Overall Assembly Process: 1. Splicing of transmission rods: Select the corresponding number of transmission rods 21 according to the working height requirements; insert the constricted plug 2111 of the first section of the transmission rod into the socket 2112 of the second section, ensuring that the non-circular plug 2122 of the inner rod is inserted into the non-circular socket 2121; move the quick clamp 22 to the insertion point, align the anti-disengagement pin 221 with the positioning hole 214, and lock the quick clamp 22 to complete the single-section splicing; repeat the operation until the total length of the transmission rod meets the working requirements.

[0032] 2. Power and transmission connection: Insert the non-circular inner rod socket 2121 at the rear end of the transmission rod part 2 into the output end 11 of the power part 1, and position it by an axial fixing structure (e.g., bolts).

[0033] 3. Connection between transmission and machine head: Insert the non-circular inner rod plug 2122 at the front end of the transmission rod part 2 into the input end 31 of the machine head part 3, and fix it by the positioning structure (e.g., pin); ensure that the power output end 11, transmission rod 21, input end 31, and working tool 32 are coaxial, and ensure axial consistency.

[0034] III. Working Principle: Power transmission: When the power unit 1 is started, the output end 11 drives the inner rod 212 of the transmission rod to rotate along the central axis OO; the inner rod transmits the torque to each section of the transmission rod in sequence through a non-circular plug-in structure, and finally transmits it to the input end 31 of the machine head part 3; Power steering and operation: The input end 31 drives the coaxial fixed driving bevel gear 331 to rotate. The bevel gear's conical teeth mesh with the transmission bevel gear 332 fixed on the rotating shaft 335 of the intermediate gear 333 (spur gear), converting the axial rotational power into the lateral rotational power. The intermediate gear 333 drives the driven gear 334 (spur gear) to rotate synchronously. The driven gear 334 drives the drive shaft 336 of the working tool 32 to rotate, thereby driving the chainsaw chain (the chainsaw chain is not shown in the figure, only the chainsaw guide plate is shown) to rotate or the hedge blades to reciprocate, completing the trimming and sawing operations. Operating characteristics: Since all core components are coaxial, when the operator holds the outer tube of the transmission rod, the force is transmitted along the axis without eccentric torque; during operation, the anti-disengagement pin of the quick clamp cooperates with the positioning hole to prevent the transmission rod from loosening, and the stable meshing of the gear assembly ensures continuous power transmission, making the operation stable and reliable.

[0035] IV. Performance Testing and Verification: The invention was tested under different operating scenarios, and the results are as follows: 1. Stability test: When working on high branches, the machine head does not rotate or deviate, and the difficulty of holding it is significantly reduced compared to the existing eccentric structure; after continuous operation, the operator's fatigue is significantly lower than that of traditional equipment.

[0036] 2. Adjustment efficiency test: The transmission rod is easy to assemble and disassemble, and the adjustment speed is much faster than the threaded connection structure, which can quickly adapt to different height operation requirements.

[0037] 3. Reliability test: Under simulated operating vibration environment, after continuous operation, there was no loosening at the transmission rod connection, the torque transmission was stable, and the overall operation of the equipment was reliable.

[0038] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A modular, axially collinear garden machine, comprising a power unit (1), a transmission rod unit (2), and a head unit (3), characterized in that: The power unit (1) is provided with an output end (11), the head unit (3) is provided with an input end (31) and a working tool (32). The output end (11) of the power unit (1) is connected to the rear end of the transmission rod part (2), and the front end of the transmission rod part (2) is connected to the input end (31) of the head unit (3). The output end (11) of the power unit (1), the transmission rod part (2), the input end (31) of the head unit (3) and the working tool (32) are all coaxially arranged. The transmission rod part (2) includes at least two transmission rods (21) and quick clamps (22); the transmission rod (21) includes an outer tube (211) and an inner rod (212), and the outer tube (211) and the inner rod (212) are connected and fixed by bearings (213); one end of the inner rod (212) is provided with a non-circular socket (2121), and the other end is provided with a non-circular plug (2122) that matches the non-circular socket (2121); one end of the outer tube (211) is provided with a constricted plug part (2111), and the other end is provided with a socket part (2112), and adjacent transmission rods (21) are connected to the socket part (2112) through the constricted plug part (2111) and the socket part (2112); the connection of the transmission rod (21) is tightened and fixed by quick clamps (22).

2. The axially collinear garden machinery that can be spliced ​​according to claim 1, characterized in that: The head part (3) is a chainsaw or a hedge trimmer; when it is a chainsaw, the working blade (32) is a chainsaw guide plate and a saw chain; when it is a hedge trimmer, the working blade (32) is a hedge trimmer blade.

3. The axially collinear garden machinery that can be spliced ​​according to claim 1, characterized in that: The input end (31) of the machine head part (3) is connected to the working tool (32) through a gear assembly (33); the gear assembly (33) includes a driving bevel gear (331), an intermediate gear (333) and a driven gear (334). The central axis of the driving bevel gear (331) is fixed coaxially with the input end (31); the intermediate gear (333) and the driven gear (334) are both spur gears. A transmission bevel gear (332) is provided on the rotating shaft of the intermediate gear (333). The transmission bevel gear (332) meshes with the driving bevel gear (331), the intermediate gear (333) meshes with the driven gear (334), and the driven gear (334) is fixed to the drive shaft of the working tool (32).

4. The axially collinear garden machinery that can be spliced ​​according to claim 1, characterized in that: The insertion portion (2112) is provided with a notch (2113) extending axially.

5. The axially collinear garden machinery that can be spliced ​​according to claim 1, characterized in that: The constricted plug portion (2111) and the socket portion (2112) are provided with corresponding positioning holes (214), and the inner wall of the quick clamp (22) is provided with an anti-disengagement pin (221) that matches the positioning hole (214).

6. The axially collinear garden machinery that can be spliced ​​according to claim 1, characterized in that: The power unit (1) is a gasoline engine or an AC motor, and its output end (11) is connected to the inner rod (212) of the transmission rod (21) through a non-circular socket (2121) and a non-circular plug (2122).

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