Spliced transmission rod structure for garden machinery

Abstract

The utility model discloses a kind of spliced transmission rod structures for garden machinery belongs to garden machinery fittings field, including transmission rod unit and quick clamp. Transmission rod unit contains outer tube and inner rod, and the inner rod both ends are equipped with non-circular plug and socket, for butt joint transmission torque;Outer tube both ends are equipped with necked plug portion and socket portion, for structure splicing;Outer tube socket portion is equipped with axial notch, and splicing adhesion is improved. Quick clamp is sleeved in outer tube splicing, and is prevented by preventing loose pin and positioning clamping hole cooperation to realize loose. This structure can be quickly adjusted length, transmission is stable, splicing is reliable, and is suitable for various high branch garden machinery, solve the problem that traditional transmission rod length is fixed, splicing is unreliable.

Description

Technical Field

[0001] This utility model belongs to the technical field of garden machinery parts, specifically relating to a transmission rod structure that is compatible with garden machinery such as high-branch chainsaws and hedge trimmers, and can achieve rapid splicing and flexible length adjustment. Background Technology

[0002] In high-branch gardening operations, the drive rod is the core component connecting the power unit and the machine head, and its length directly determines the working range. Existing garden machinery drive rods have significant drawbacks: most are one-piece fixed structures, which cannot be flexibly adjusted according to the working height (such as pruning low shrubs and sawing tall trees), resulting in poor versatility; a few adjustable drive rods use threaded connections, which not only require repeated tightening during splicing, resulting in low adjustment efficiency, but also easily cause the threads to loosen due to mechanical vibration during operation, posing safety hazards such as transmission interruption and machine head detachment; at the same time, the torque transmission stability of traditional adjustable structures is insufficient, and slippage is prone to occur during high-speed rotation, affecting work efficiency and safety.

[0003] To address the problems of existing transmission rods having unadjustable lengths and poor splicing reliability, this utility model provides a spliced ​​transmission rod structure that is easy to assemble and provides stable transmission. Utility Model Content

[0004] The purpose of this invention is to overcome the shortcomings of existing garden machinery transmission rods, such as fixed length, low efficiency of threaded splicing, and easy loosening. It provides a spliced ​​transmission rod structure for garden machinery, which achieves flexible length adjustment and ensures stable torque transmission through quick insertion and anti-loosening design of multi-section unit rods.

[0005] The above-mentioned objective of this utility model is achieved through the following technical solution: a splicing transmission rod structure for garden machinery, comprising at least two transmission rod units and quick clamps for fixing the splicing joints;

[0006] Transmission rod unit: includes an outer tube and an inner rod, the outer tube and the inner rod are connected and fixed by bearings, and the inner rod can rotate freely inside the outer tube;

[0007] 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 cross-section of the non-circular socket and the non-circular plug is polygonal, elliptical or spline-shaped, and is used for the inner rods of adjacent transmission rod units to connect and transmit torque.

[0008] One end of the outer tube is provided with a constricted plug and the other end is provided with a socket. When adjacent transmission rod units are spliced, the constricted plug of the previous section of the outer tube is inserted into the socket of the next section of the outer tube.

[0009] Quick clamp: The constricted plug and the insertion part of the outer tube are provided with corresponding positioning holes, and the inner wall of the quick clamp is provided with anti-disengagement pins that match the positioning holes; when the quick clamp is fitted onto the splice of the outer tube and tightened, the anti-disengagement pins are embedded in the positioning holes, forming a dual positioning in both circumferential and axial directions.

[0010] Furthermore, the outer tube has an axially extending notch at the insertion port, giving the insertion port radial shrinkage elasticity, which facilitates a tight fit with the shrink-fit plug portion.

[0011] Furthermore, the bearing is a deep groove ball bearing, which is fixed between the outer tube and the inner rod by an interference fit to ensure that the inner rod rotates without jamming.

[0012] The advantages of this utility model compared with the prior art are:

[0013] 1. Highly efficient and flexible length adjustment: The total length can be flexibly adjusted according to the working height requirements through quick plug-in of multi-section transmission rod units. Splicing / disassembly can be completed with quick clamps, greatly improving operation efficiency;

[0014] 2. Reliable and anti-loosening splicing: The outer tube is fitted with the constricted plug and the socket, and is positioned by the anti-loosening pin of the quick clamp and the positioning hole. It can withstand the axial tension and high-frequency vibration during operation and prevent the splice from loosening.

[0015] 3. Stable torque transmission: The inner rod connects to the socket through a non-circular plug, with a gapless fit, preventing slippage during high-speed rotation and ensuring high torque transmission efficiency;

[0016] 4. High adaptability: Adopting a standardized design, it can be adapted to different models of high-branch chainsaws and hedge trimmers. When a single unit is damaged, it can be replaced individually, reducing maintenance costs. Attached Figure Description

[0017] The accompanying drawings, which are included to provide a further understanding of the present invention and form part of this application, illustrate exemplary embodiments of the present invention and, together with their description, serve to explain the present invention, but do not constitute an undue limitation thereof. In the drawings:

[0018] Figure 1 This is a schematic diagram of the structure of this utility model.

[0019] Figure 2 This is a schematic diagram of the docking structure of the transmission rod unit in this utility model.

[0020] Figure 3 This is a schematic diagram of one end of the transmission rod unit in this utility model.

[0021] Figure 4 This is a schematic diagram of the other end of the transmission rod unit in this utility model.

[0022] Figure 5 yes Figure 4 A schematic diagram of the internal structure.

[0023] Explanation of reference numerals in the attached drawings: 1-Transmission rod unit, 11-Outer tube, 111-Reduced plug part, 112-Socket part, 113-Notch, 12-Inner rod, 121-Non-circular socket, 122-Non-circular plug, 13-Bearing, 14-Positioning hole, 2-Quick clamp, 21-Anti-disengagement pin. Detailed Implementation

[0024] To make the objectives, technical solutions, and advantages of this utility model clearer, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings. It should be understood that these descriptions are merely exemplary and not intended to limit the scope of this utility model. Furthermore, descriptions of well-known structures and technologies are omitted in the following description to avoid unnecessarily obscuring the concept of this utility model.

[0025] like Figures 1 to 5 As shown, a splicing transmission rod structure for garden machinery includes at least two transmission rod units 1 and quick clamps 2 for fixing the splicing joints. Each transmission rod unit 1 includes an outer tube 11 and an inner rod 12. The outer tube 11 and the inner rod 12 are connected and fixed by a bearing 13, which is a deep groove ball bearing. The bearing 13 is fixed between the outer tube 11 and the inner rod 12 with an interference fit, ensuring that the inner rod 12 rotates without jamming and can rotate freely within the outer tube 11. One end of the inner rod 12 has a non-circular socket 121, and the other end has a non-circular plug 122 that matches the non-circular socket 121. The non-circular socket 121 and the non-circular plug 122... The cross-section of the outer tube 11 is polygonal, elliptical, or splined, used for the mating of the inner tubes 12 of adjacent transmission rod units 1 to transmit torque. One end of the outer tube 11 is provided with a constricted plug portion 111, and the other end is provided with a socket portion 112. When adjacent transmission rod units 1 are spliced, the constricted plug portion 111 of the previous section of the outer tube is inserted into the socket portion 112 of the next section of the outer tube. The constricted plug portion 111 and the socket portion 112 of the outer tube 11 are provided with corresponding positioning holes 14. The inner wall of the quick clamp 2 is provided with an anti-disengagement pin 21 that matches the positioning hole 14. When the quick clamp 2 is fitted onto the splice of the outer tube and tightened, the anti-disengagement pin 21 is embedded in the positioning hole 14, forming a dual positioning in both the circumferential and axial directions. At the same time, the socket portion 112 of the outer tube 11 is provided with an axially extending notch 113, so that the socket portion 112 has radial shrinkage elasticity, which facilitates a tight fit with the constricted plug portion 111.

[0026] Specific implementation of this utility model:

[0027] (a) Component assembly:

[0028] Transmission rod unit assembly: Press the bearing (13) onto the inner wall of the outer tube (11), and then insert the inner rod (12) into the inner ring of the bearing (13). The relative rotation positioning of the outer tube (11) and the inner rod (12) is achieved through interference fit; positioning holes (14) are machined at corresponding positions of the inner and outer tubes, and 2-4 evenly distributed axial notches (113) are machined at the outer tube insertion part (112).

[0029] Splicing preparation: Select the corresponding number of transmission rod units (1) according to the working height, and prepare suitable quick clamps (2).

[0030] (II) Assembly process:

[0031] Insert the non-circular plug (122) of the inner rod of the first transmission rod unit into the non-circular socket (121) of the second section, and at the same time insert the constricted plug (111) of the outer tube of the first section into the socket (112) of the second section.

[0032] Move the quick clamp (2) to the outer tube splice, align the anti-disengagement pin (21) with the positioning hole (14), tighten the quick clamp (2), at this time the insertion part (112) shrinks due to the notch (113) and fits tightly with the shrink plug part (111), completing the single section splicing;

[0033] Repeat the above steps until the total length of the transmission rod meets the operational requirements. Finally, connect the two ends of the assembled transmission rod to the power output end and the machine head input end of the garden machinery, respectively.

[0034] (III) Working principle:

[0035] The torque output by the garden machinery power unit is transmitted through the inner rod (12) of the end transmission rod unit, and then transmitted to each section of the inner rod in sequence through the cooperation of the non-circular plug (122) and the socket (121), finally driving the machine head to work; the outer tube (11) is fixed by the quick clamp (2) to form a stable support structure, and the bearing (13) ensures that the inner rod (12) rotates without jamming, realizing the independent operation of power transmission and structural support.

[0036] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent structural or procedural transformations made based on the description and drawings of this utility model, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A splicing transmission rod structure for garden machinery, characterized in that: It includes at least two transmission rod units (1) and quick clamps (2); the transmission rod unit (1) includes an outer tube (11) and an inner rod (12), and the outer tube (11) and the inner rod (12) are connected and fixed by bearings (13); one end of the inner rod (12) is provided with a non-circular socket (121), and the other end is provided with a non-circular plug (122) that matches the non-circular socket (121); one end of the outer tube (11) is provided with a constricted plug part (111), and the other end is provided with a socket part (112), and adjacent transmission rod units (1) are connected by the constricted plug part (111) and the socket part (112); the quick clamps (2) are fitted at the splice of the outer tube for tightening and fixing.

2. The splicing transmission rod structure for garden machinery according to claim 1, characterized in that: The outer tube (11) has corresponding positioning holes (14) on the constricted plug part (111) and the plug part (112), and the quick clamp (2) has an anti-disengagement pin (21) matching the positioning hole (14) on its inner wall.

3. The splicing transmission rod structure for garden machinery according to claim 1, characterized in that: The insertion portion (112) of the outer tube (11) is provided with a notch (113) extending axially.

4. The splicing transmission rod structure for garden machinery according to claim 1, characterized in that: The cross-sections of the non-circular socket (121) and the non-circular plug (122) are polygonal, elliptical, or spline-shaped.

5. The splicing transmission rod structure for garden machinery according to claim 1, characterized in that: The bearing (13) is a deep groove ball bearing, which is fixed between the outer tube (11) and the inner rod (12) by interference fit.

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