A type of tall branch

Abstract

A high pole includes a pole body, tool mounting seats and a drive handle respectively disposed at both ends of the pole body. The pole body includes at least two nested inner aluminum tubes and outer aluminum tubes. A roller assembly is provided between the inner and outer aluminum tubes. The roller assembly elastically abuts against the outer surface of the inner aluminum tube and the inner surface of the outer aluminum tube respectively, so that the inner and outer aluminum tubes are electrically connected through the roller assembly. Two core spring wires are movably threaded through the inner aluminum tubes. The two ends of the two core spring wires are electrically connected to the tool mounting seat and the drive handle respectively. The inner aluminum tube, the outer aluminum tube and the two core spring wires together form a complete circuit loop.

Description

Technical Field

[0001] This utility model belongs to the field of garden tool technology, specifically referring to a high branch pole, which is mainly used in garden pruning tools such as high branch shears and high branch saws driven by lithium batteries. It is suitable for tasks such as shaping and pruning high branches, removing diseased and pest-infested branches, and harvesting fruits. Background Technology

[0002] In garden maintenance, tools such as high-pole pruning shears and high-pole saws require extension poles (high-pole poles) for high-altitude operations. The stability and durability of their electrical connections directly affect the effectiveness of these tools. Currently, the electrical connections of high-pole poles mostly rely on traditional wires, such as multi-core cables or independent power lines, achieving conductivity through plug-and-socket connections.

[0003] In the prior art, for example, the utility model patent with authorization announcement number CN221843109U discloses a high pole, which includes a pole body and tool mounting seats and drive handles respectively disposed at both ends of the pole body. The pole body includes at least two segments: a first pole body and a second pole body. A clamp is provided at the connection between the first pole body and the second pole body. The first pole body is fixedly connected to the second pole body through the clamp. A first power line is movably disposed within the first pole body, and a second power line is movably disposed within the second pole body. The first power line and the second power line are respectively provided with a power output terminal and a power input terminal at their ends. The power output terminal and the power input terminal are independent of the ends of the first pole body and the second pole body. The power output terminal matches the power input terminal. When the power output terminal of an adjacent first power line and the power input terminal are connected, the first power line and the second power line are connected. This technology avoids damage to the power line caused by the shaking and pulling of the pole body through the segmented pole body and independent power line design, but it still relies on traditional wires as the conductive medium and has the following drawbacks:

[0004] During the extension and retraction of the pole, the conductor is prone to fatigue damage due to bending and friction, which can lead to open circuits or poor contact.

[0005] The wiring complexity of multi-core conductors increases with the length of the pole, resulting in higher assembly and maintenance costs.

[0006] The relative motion between the conductor and the pole can easily cause signal interference, affecting control accuracy (such as speed control signal transmission).

[0007] Furthermore, the traditional high-pole design, with its separate conductive and support structures, increases the overall weight of the pole, making it unsuitable for prolonged outdoor operations. Therefore, a high-pole structure that integrates conductive and support functions, accommodates telescopic features, and provides stable connections is needed. Utility Model Content

[0008] The purpose of this invention is to provide a high pole with a simple structure, reliable conductivity, and adaptability to telescopic characteristics. It replaces some of the functions of traditional wires with a double-layer aluminum tube conductive structure, thus solving problems such as easy damage to wires and complex wiring in the prior art.

[0009] To achieve the above objectives, the present invention adopts the following technical solution:

[0010] A high pole includes a pole body, tool mounting seats and a drive handle respectively disposed at both ends of the pole body. The pole body includes at least two nested inner aluminum tubes and outer aluminum tubes. A roller assembly is provided between the inner and outer aluminum tubes. The roller assembly elastically abuts against the outer surface of the inner aluminum tube and the inner surface of the outer aluminum tube respectively, so that the inner and outer aluminum tubes are electrically connected through the roller assembly. Two core spring wires are movably threaded through the inner aluminum tubes. The two ends of the two core spring wires are electrically connected to the tool mounting seat and the drive handle respectively. The inner aluminum tube, the outer aluminum tube and the two core spring wires together form a complete circuit loop.

[0011] Furthermore, the roller assembly includes a roller body and a bracket, the bracket being fixed to the inner surface of the inner aluminum tube, and the outer circumferential surface of the roller body contacting the inner aluminum tube and the outer aluminum tube respectively.

[0012] Furthermore, the bracket includes a fixed part and an elastic arm. One end of the elastic arm is fixed to the bracket by the fixed part. In its natural state, the elastic arm maintains the contact pressure between the roller body and the two aluminum tubes.

[0013] Furthermore, the roller bodies are evenly distributed along the circumference of the aluminum tube, and at least two roller bodies are arranged along the circumference of the aluminum tube.

[0014] Furthermore, an insulating guide sleeve is provided at the nesting point of the inner aluminum tube and the outer aluminum tube. The insulating guide sleeve is fixed to the end of the outer aluminum tube, and its inner wall slides in fit with the outer surface of the inner aluminum tube to restrict the relative rotation of the inner aluminum tube and the outer aluminum tube.

[0015] Furthermore, the two-core spring wire includes a positive conductor and a signal conductor. The positive conductor is used to transmit the power supply current of the lithium battery, and the signal conductor is used to transmit control signals.

[0016] Furthermore, the inner aluminum tube and the outer aluminum tube form a common negative electrode through a double-layer aluminum tube structure. That is, the inner aluminum tube is connected to the outer aluminum tube through a roller assembly, the outer aluminum tube is electrically connected to the negative electrode of the lithium battery, and the inner aluminum tube is electrically connected to the negative electrode interface of the tool mounting base.

[0017] Furthermore, the connection of the rod body is provided with a clamp, which includes a left half clamp and a right half clamp. The left half clamp and the right half clamp are connected by bolts to secure the relative position of the inner aluminum tube and the outer aluminum tube.

[0018] Furthermore, the clamp is provided with a through hole, and a limiting rod is inserted through the through hole. The inner end of the limiting rod abuts against the inner aluminum tube to restrict the axial movement of the inner aluminum tube.

[0019] Furthermore, the tool mounting base is used to install the trimming tool, and it is equipped with a drive motor inside. The positive terminal of the drive motor is connected to the positive wire of the two-core spring wire, and the negative terminal of the drive motor is connected to the inner aluminum tube. The drive handle is equipped with a lithium battery and a control switch. The positive terminal of the lithium battery is connected to the positive wire of the two-core spring wire, and the negative terminal of the lithium battery is connected to the outer aluminum tube. The control switch is connected in series in the circuit of the signal wire.

[0020] The outstanding and beneficial technical effects of this utility model compared to the prior art are:

[0021] 1. By combining the inner aluminum tube, outer aluminum tube, and roller assembly, one conductor (common negative terminal) in the traditional three-core wire is replaced. The conductivity and structural support function of the aluminum tube are utilized to achieve an integrated "structure-conductivity" design, reducing the number of conductors used and lowering the complexity of wiring.

[0022] 2. The roller assembly maintains elastic contact throughout the expansion and contraction of the aluminum tube, ensuring continuous conductivity and solving the problem of traditional wires being prone to breakage during repeated expansion and contraction, thus extending its service life.

[0023] 3. The rigid structure of aluminum tubes is more wear-resistant and interference-resistant than wires, and the multi-point contact design (uniformly distributed circumferentially) of the roller assembly reduces the risk of single-point contact failure and improves the stability of circuit connection.

[0024] 4. Aluminum has a lower density than copper wire, which reduces the overall weight of the pole while achieving the same conductivity, making it more suitable for long-term outdoor operation. Attached Figure Description

[0025] Figure 1 This is a perspective view of the present utility model.

[0026] Figure 2 This is a side view of the present invention.

[0027] Figure 3 This is a structural diagram of the clamp component of this utility model.

[0028] Figure 4 This is a schematic diagram of a two-core spring wire.

[0029] Figure 5 This is a schematic diagram of the roller assembly.

[0030] Figure 6 This is a schematic diagram of the roller assembly installation.

[0031] Marking meanings: 1-rod body; 2-tool mounting base; 3-drive handle; 4-inner aluminum tube; 5-outer aluminum tube; 6-roller assembly; 61-roller body; 62-bracket; 621-fixed part; 622-elastic arm; 7-two-core spring wire; 71-positive wire; 72-signal wire; 8-clamp; 81-left half clamp; 82-right half clamp; 9-limiting rod; 10-insulating guide sleeve; 11-control switch. Detailed Implementation

[0032] The present invention will be further described below with reference to the accompanying drawings and specific embodiments:

[0033] Example 1

[0034] like Figure 1-6 As shown, a high-branch pole includes a pole body 1, a tool mounting base 2, and a drive handle 3. The tool mounting base 2 is located at the top of the pole body 1 and is used to mount pruning blades or saw blades. The drive handle 3 is located at the bottom of the pole body 1 and is used by the operator to hold and control the operation.

[0035] The rod 1 adopts a layered design, including an inner aluminum tube 4 and an outer aluminum tube 5. The inner aluminum tube 4 is nested inside the outer aluminum tube 5 and can slide relative to each other along the axial direction to adjust the length of the rod 1. Both the inner aluminum tube 4 and the outer aluminum tube 5 are made of 6061 aluminum alloy, which ensures both structural strength (able to withstand the torque during pruning operations) and good electrical conductivity.

[0036] A roller assembly 6 is provided between the inner aluminum tube 4 and the outer aluminum tube 5. The roller assembly 6 includes a roller body 61 and a bracket 62. The bracket 62 is fitted inside the inner aluminum tube 4, and an elastic arm 622 extends outward. One end of the elastic arm 622 is fixed to the bracket 62 by a fixing part 621, and the other end is connected to the roller body 61 through a rotating shaft. The roller body 61 is made of copper alloy (such as brass) and its surface is nickel-plated to reduce contact resistance. Its outer circumference elastically abuts against the inner surface of the outer aluminum tube 5 (the preload of the elastic arm 622 keeps the contact pressure at 0.5-1N). Through the conduction of the roller assembly 6, the inner aluminum tube 4 and the outer aluminum tube 5 form a conductive connection, together constituting the common negative terminal of the circuit.

[0037] like Figure 4 As shown, a two-core spring wire 7 is movably threaded through the axis of the inner aluminum tube 4. The two-core spring wire 7 includes a positive conductor 71 and a signal conductor 72, both with a cross-sectional area of ​​0.5 mm². 2 The wire is made of tin-plated copper wire and wrapped with a wear-resistant PVC insulating sheath. The top end of the positive wire 71 is connected to the positive terminal of the drive motor in the tool mounting base 2, and the bottom end is connected to the positive terminal of the lithium battery in the drive handle 3; the top end of the signal wire 72 is connected to the control terminal of the drive motor, and the bottom end is connected to the control switch in the drive handle 3, for transmitting speed regulation signals.

[0038] like Figure 5-6 As shown, the bottom end of the outer aluminum tube 5 is connected to the negative terminal of the lithium battery, and the top end of the inner aluminum tube 4 is connected to the negative terminal of the drive motor. Through the conduction of the roller assembly 6, a current return path of "lithium battery negative terminal → outer aluminum tube → roller assembly → inner aluminum tube → drive motor negative terminal" is formed, which is a common negative terminal loop.

[0039] The overall high-branch circuit is as follows:

[0040] Main power supply circuit (power transmission): The positive terminal of the lithium battery 12 transmits current to the positive terminal of the drive motor in the tool mounting base 2 through the positive wire 71 in the two-core spring wire 7. After the drive motor starts working, the current flows out from the negative terminal of the drive motor, is conducted through the inner aluminum tube 4 to the roller assembly 6, the roller assembly 6 transmits the current to the outer aluminum tube 5, and finally the outer aluminum tube 5 returns the current to the negative terminal of the lithium battery 12, forming a complete power supply circuit to provide continuous working current for the drive motor.

[0041] Control signal loop (signal transmission): The operator sends a control signal (such as a speed adjustment signal) through the control switch 11 inside the drive handle 3. This signal is transmitted to the control terminal of the drive motor via the signal wire 72 in the two-core spring wire 7 to control the speed and other operating states of the drive motor. The signal ground of the signal loop is the same as the common negative terminal of the main power supply loop. That is, the return path of the signal is also achieved through the common negative terminal formed by the inner aluminum tube 4, the roller assembly 6, and the outer aluminum tube 5, ensuring the stability and accuracy of signal transmission.

[0042] Furthermore, an insulating guide sleeve 10 is provided at the nesting point of the inner aluminum tube 4 and the outer aluminum tube 5 (the top of the outer aluminum tube 5). The insulating guide sleeve 10 is made of polytetrafluoroethylene. Its outer circle is interference-fitted with the inner wall of the outer aluminum tube 5, and its inner hole is clearance-fitted with the outer circle of the inner aluminum tube 4 (gap 0.1-0.2mm). This ensures the smooth sliding of the inner aluminum tube 4 and restricts the relative rotation between the two, thus preventing the roller assembly 6 from being worn due to torsional force.

[0043] Furthermore, a clamp 8 is provided in the middle section of the rod body 1. The clamp 8 includes a left half clamp 81 and a right half clamp 82. One end of the left half clamp 81 and the right half clamp 82 are connected by a hinge, and the other end is fastened by a bolt. The inner hole of the clamp 8 is adapted to the outer circle of the outer aluminum tube 5. After being fastened, it can restrict the relative sliding between the inner aluminum tube 4 and the outer aluminum tube 5. After adjusting the length of the rod body 1 according to the operation requirements, the position is locked by the clamp 8.

[0044] Furthermore, the end of the inner aluminum tube 4 is provided with a through hole, through which a limiting rod 9 is inserted. The limiting rod 9 is made of plastic, and its end abuts against the outer surface of the inner aluminum tube 4, restricting the axial movement of the inner aluminum tube 4 through friction. When the length needs to be adjusted, the bolts of the clamp 8 are loosened, and the limiting rod 9 is pulled outward to release the restriction.

[0045] Furthermore, the drive motor is a DC brushless motor (operating voltage 24V, rated current 3A), and its control terminal receives the PWM signal (duty cycle 0-100%) transmitted by the signal wire 72 to realize speed regulation; the lithium battery is a 24V battery pack (capacity 5Ah) composed of 18650 cells, with a built-in protection board to prevent overcharging and over-discharging; the control switch 11 is a Hall sensor type knob, which changes the duty cycle of the PWM signal transmitted by the signal wire 72 by rotating the angle to realize stepless speed regulation.

[0046] The working process of this utility model is as follows:

[0047] During operation, the lithium battery supplies power to the drive motor through the positive wire 71. After passing through the drive motor, the current returns to the negative terminal of the lithium battery through the inner aluminum tube 4, the roller assembly 6, and the outer aluminum tube 5, forming the main power supply circuit. The operator adjusts the PWM signal transmitted by the signal wire 72 through the control switch 11 of the drive handle 3 to control the speed of the drive motor and adjust the trimming speed.

[0048] When the length of rod 1 needs to be adjusted, loosen the bolts of clamp 8, pull the limit rod 9 outward, push or pull the inner aluminum tube 4 to move axially, and the roller assembly 6 will always keep in contact with the inner and outer aluminum tubes under the action of the elastic arm 622 to ensure that the conductivity is not interrupted; after the adjustment is in place, tighten clamp 8 and loosen limit rod 9 to complete the length locking.

[0049] When the length of the pole exceeds 3 meters, the wall thickness of the aluminum tube can be designed according to the load-bearing requirements (1-2 mm is recommended) to further ensure the reliability of electrical conductivity; while taking into account both structural strength and lightweight.

[0050] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

[0051] Example 2

[0052] This embodiment has a basically the same structure as Embodiment 1, the difference being the number and distribution of the roller bodies 61, as detailed below:

[0053] Four roller bodies 61 (each spaced 90° apart) are evenly distributed circumferentially between the inner aluminum tube 4 and the outer aluminum tube 5. Each roller body 61 includes an elastic arm 622, which extends outward and its end is connected to the roller body 61 via a pivot. The roller body 61 is made of copper alloy (such as brass) and nickel-plated to reduce contact resistance. Its outer circumferential surface elastically abuts against the inner surface of the outer aluminum tube 5 (the preload of the elastic arm 622 keeps the contact pressure of each set of rollers at 0.5-1N).

[0054] Through the conduction of multiple roller bodies 61, the inner aluminum tube 4 and the outer aluminum tube 5 form a more stable conductive connection, together constituting the common negative terminal of the circuit. The design of multiple metal rollers can reduce the risk of single-point contact failure. Even if individual rollers are affected by wear or impurities, the remaining rollers can still ensure conductive continuity, further improving circuit reliability.

[0055] The connection methods and working principles of the main power supply circuit, control signal circuit, insulating guide sleeve 10, clamp 8, limit rod 9 and other components in this embodiment are the same as those in Embodiment 1, and will not be repeated here.

[0056] The advantage of this embodiment is that:

[0057] The distributed design of multiple roller bodies 61 along the circumference can disperse contact pressure, reduce the wear rate of individual rollers, and extend service life. At the same time, multi-point contact can reduce the risk of electrical interruption caused by oxidation of aluminum tube surface, foreign matter adhesion, etc., making it especially suitable for outdoor operation scenarios with a lot of dust and harsh environment.

[0058] The above embodiments are merely preferred embodiments of the present utility model and are not intended to limit the scope of protection of the present utility model. Therefore, all equivalent changes made to the structure, shape, and principle of the present utility model should be covered within the scope of protection of the present utility model.

Claims

1. A tall pole, comprising a pole body (1) and tool mounting seats (2) and a drive handle (3) respectively disposed at both ends of the pole body (1), characterized in that: The rod (1) includes at least two nested inner aluminum tubes (4) and outer aluminum tubes (5). A roller assembly (6) is provided between the inner aluminum tube (4) and the outer aluminum tube (5). The roller assembly (6) elastically abuts against the outer surface of the inner aluminum tube (4) and the inner surface of the outer aluminum tube (5), so that the inner aluminum tube (4) and the outer aluminum tube (5) form a conductive connection through the roller assembly (6). Two core spring wires (7) are movably threaded through the inner aluminum tube (4). The two ends of the two core spring wires (7) are electrically connected to the tool mounting base (2) and the drive handle (3), respectively. The inner aluminum tube (4), the outer aluminum tube (5) and the two core spring wires (7) together form a complete circuit loop.

2. The tall branch pole according to claim 1, characterized in that: The roller assembly (6) includes a roller body (61) and a bracket (62). The bracket (62) is fixed to the inner surface of the inner aluminum tube (4), and the outer circumferential surface of the roller body (61) contacts the inner aluminum tube (4) and the outer aluminum tube (5) respectively.

3. The tall branch pole according to claim 2, characterized in that: The bracket (62) includes a fixing part (621) and an elastic arm (622). One end of the elastic arm (622) is fixed to the bracket (62) by the fixing part (621). In its natural state, the elastic arm (622) keeps the roller body (61) in contact with the two aluminum tubes.

4. The tall branch pole according to claim 3, characterized in that: The roller bodies (61) are evenly distributed along the circumference of the aluminum tube, and at least two roller bodies (61) are provided along the circumference of the aluminum tube.

5. The tall branch pole according to claim 1, characterized in that: An insulating guide sleeve (10) is provided at the nesting point of the inner aluminum tube (4) and the outer aluminum tube (5). The insulating guide sleeve (10) is fixed to the end of the outer aluminum tube (5), and its inner wall slides in fit with the outer surface of the inner aluminum tube (4) to restrict the relative rotation of the inner aluminum tube (4) and the outer aluminum tube (5).

6. The tall branch pole according to claim 1, characterized in that: The two-core spring wire (7) includes a positive conductor (71) and a signal conductor (72). The positive conductor (71) is used to transmit the power supply current of the lithium battery, and the signal conductor (72) is used to transmit control signals.

7. The tall branch pole according to claim 1, characterized in that: The inner aluminum tube (4) and the outer aluminum tube (5) form a common negative electrode through a double-layer aluminum tube structure. That is, the inner aluminum tube (4) is connected to the outer aluminum tube (5) through the roller assembly (6), the outer aluminum tube (5) is electrically connected to the negative electrode of the lithium battery, and the inner aluminum tube (4) is electrically connected to the negative electrode interface of the tool mounting base (2).

8. The tall branch pole according to claim 1, characterized in that: The rod body (1) is provided with a clamp (8) at the connection point. The clamp (8) includes a left half clamp (81) and a right half clamp (82). The left half clamp (81) and the right half clamp (82) are connected by bolts to fasten the relative positions of the inner aluminum tube (4) and the outer aluminum tube (5).

9. The tall branch pole according to claim 8, characterized in that: The clamp (8) is provided with a through hole, and a limiting rod (9) is inserted through the through hole. The inner end of the limiting rod (9) abuts against the inner aluminum tube (4) to limit the axial movement of the inner aluminum tube (4).

10. The tall branch pole according to claim 1, characterized in that: The tool mounting base (2) is equipped with a drive motor. The positive terminal of the drive motor is connected to the positive wire (71) of the two-core spring wire (7), and the negative terminal of the drive motor is connected to the inner aluminum tube (4). The drive handle (3) is equipped with a lithium battery and a control switch (11). The positive terminal of the lithium battery is connected to the positive wire (71) of the two-core spring wire (7), and the negative terminal of the lithium battery is connected to the outer aluminum tube (5). The control switch (11) is connected in series in the circuit of the signal wire (72).

Images