Variable-speed hedge cutting machine

Abstract

The utility model relates to the technical field of hedge cutting machines, in particular to a variable-speed hedge cutting machine which comprises a cutting machine handle, a variable-speed button is installed outside the cutting machine handle, and a protection mechanism used for shielding the variable-speed button is arranged on the face, corresponding to the variable-speed button, of the cutting machine handle. The protective mechanism comprises a threaded plate, a protective cover and internal threads, a plurality of friction blocks used for rotating the protective cover are fixedly installed outside the protective cover, the threaded plate is matched with the internal threads on the inner side of the protective cover, the position of the protective cover is fixed, the protective cover is prevented from moving accidentally, and at the moment, the protective cover directly plays a role in shielding and protecting the speed change button; the situation that cutting work is affected and even potential safety hazards are caused due to speed adjustment deviation caused by accidental touch in the working process is prevented, damage of external force to the internal structure of the speed change button is reduced, the probability of failure of the speed change button is reduced, and it is guaranteed that the hedge cutting machine can work as expected.

Description

Technical Field

[0001] This utility model relates to the field of hedge cutter technology, and in particular to a variable speed hedge cutter. Background Technology

[0002] A hedge trimmer, also known as a hedge cutter, is a gardening tool used to trim hedges, shrubs, and tree walls. It has the following structure:

[0003] 1. Engine: Common gasoline hedge trimmers use a small gasoline engine as their power source;

[0004] 2. Blade: This is the main working part of the hedge trimmer. There are single-blade and double-blade blades. The blades are sharp and can quickly and neatly cut the branches and leaves of the hedge.

[0005] 3. Handles: including the main handle and the front or side handle. The main handle is located at the rear of the machine, and the front or side handle is installed at the front or sides of the machine housing.

[0006] 4. Buttons: Used to control the start, stop, and speed adjustment functions of the hedge trimmer, generally including power switch, throttle control switch, etc.

[0007] During use, operators adjust the blade speed by pressing the speed change button. The environment for hedge trimming is complex and changeable. When working among hedges, operators inevitably collide with surrounding obstacles. The protruding speed change button on the main handle is easily impacted. Such collisions can not only cause changes in blade speed but may also cause the equipment to go out of control due to sudden speed changes, posing a potential safety threat to the operator. In addition, external impacts can damage the internal structure of the speed change button, such as wear on the button contacts or loosening of internal wiring, which can lead to the speed change button malfunctioning and making it impossible to adjust the blade speed normally, thus preventing the hedge cutter from working as expected. Summary of the Invention

[0008] To address the shortcomings of existing technologies, this utility model provides a variable-speed hedge cutter, solving the problem that the complex and ever-changing environment of hedge trimming inevitably leads to collisions with surrounding obstacles when operators are working among hedges. The protruding speed change button on the main handle is highly susceptible to impact, which can not only cause changes in blade speed but also potentially lead to equipment malfunction due to sudden speed changes, posing a potential safety threat to the operator. In addition, external impacts can damage the internal structure of the speed change button, such as wear on the button contacts or loosening of internal wiring, resulting in the speed change button malfunctioning and being unable to properly adjust the blade speed, thus preventing the hedge cutter from working as expected.

[0009] To achieve the above objectives, this utility model provides the following technical solution:

[0010] A variable-speed hedge cutter includes a cutter handle, a speed change button mounted on the outside of the cutter handle, and a protective mechanism for covering the speed change button on the side of the cutter handle opposite to the speed change button. The protective mechanism includes a threaded plate, a protective cover, and an internal thread. There are two threaded plates, both of which are attached to the outside of the cutter handle. The protective cover is slidably connected to the outside of the cutter handle and is used to cover the speed change button. The internal thread is formed on the inside of the protective cover. Several friction blocks for rotating the protective cover are fixedly mounted on the outside of the protective cover.

[0011] Preferably, each threaded plate has a mounting bracket fixedly installed on the side away from the protective cover, and the cutting machine handle has a mounting plate fixedly installed on the side corresponding to each mounting bracket, with the mounting bracket slidably connected to the outside of the mounting plate.

[0012] Preferably, each mounting plate has a groove on its exterior, and a limit block is slidably connected inside each groove. The limit block is located above the mounting frame, and a spring is fixedly connected inside each groove. The spring is fixedly connected to the outside of the limit block to ensure the stability of the connection between the mounting plate and the mounting frame.

[0013] Preferably, each mounting plate has an opening on its exterior, and each opening has a protrusion slidably connected inside to limit the movement range of the limiting block. The protrusion is fixedly connected to the exterior of the limiting block.

[0014] Preferably, the cutting machine handle has threaded holes on one side of each mounting plate, and each threaded hole is threaded with a threaded rod. The threaded rod is fixedly installed on the lower surface of the mounting plate, improving the flexibility of the mounting plate.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] 1. The threaded plate engages with the internal thread on the inner side of the protective cover to fix the position of the protective cover and prevent it from moving accidentally. At this time, the protective cover directly shields and protects the speed change button, preventing deviations in speed adjustment caused by accidental contact during operation, which may affect the cutting work or even cause safety hazards. It reduces the damage of external forces to the internal structure of the speed change button, lowers the probability of speed change button failure, and ensures that the hedge cutter can work as expected.

[0017] Second, the groove provides sliding and installation space for the limit block and the spring, and the spring provides the elastic force for the limit block to return to its original position. When the limit block is pressed to compress the spring, releasing the spring will cause the limit block to return to its original position, realizing automatic locking of the mounting bracket and ensuring the stability of the protective mechanism after installation. At the same time, the detachable design ensures the flexibility of the protective mechanism in use. Attached Figure Description

[0018] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings.

[0019] Figure 1 This is a three-dimensional structural diagram of the present invention.

[0020] Figure 2 This utility model Figure 1 Structural diagram of the handle of a medium-sized cutting machine.

[0021] Figure 3 This utility model Figure 1 Enlarged structural diagram at point A in the middle.

[0022] Figure 4 This utility model Figure 2 Enlarged structural diagram at point B in the middle.

[0023] Figure 5 This utility model Figure 3 Exploded view of the mounting bracket.

[0024] Figure 6 This utility model Figure 1 Structural diagram of the protective shield.

[0025] Figure 7 This utility model Figure 2 Structural diagram of the threaded plate.

[0026] Legend: 1. Cutting machine handle; 2. Speed ​​change button; 3. Threaded plate; 4. Protective cover; 5. Internal thread; 6. Friction block; 7. Mounting bracket; 8. Mounting plate; 9. Groove; 10. Limiting block; 11. Spring; 12. Opening; 13. Protrusion; 14. Threaded hole; 15. Threaded rod. Detailed Implementation

[0027] This application provides a variable-speed hedge cutter, which effectively solves the problem that the hedge trimming environment is complex and ever-changing. When working among hedges, operators inevitably collide with surrounding obstacles. The protruding speed change button 2 on the main handle is easily impacted. Such collisions not only cause changes in blade speed but may also cause the equipment to go out of control due to sudden speed changes, posing a potential safety threat to the operator. In addition, external impacts can damage the internal structure of the speed change button 2, such as wear on the button contacts or loosening of internal wiring, which can lead to the speed change button 2 malfunctioning and unable to adjust the blade speed normally, making the hedge cutter unable to work as expected. Example

[0028] like Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the technical solution in this application embodiment effectively solves the problem that the hedge trimming environment is complex and changeable. When working among hedges, operators inevitably collide with surrounding obstacles, and the protruding speed change button 2 on the main handle is easily impacted. Such collisions not only cause changes in blade speed but may also cause equipment malfunction due to sudden speed changes, posing a potential safety threat to the operator. In addition, external impacts can damage the internal structure of the speed change button 2, such as wear on button contacts or loosening of internal wiring, leading to the malfunction of the speed change button 2 and the inability to properly adjust the blade speed, thus preventing the hedge cutter from working as expected. The overall approach is as follows:

[0029] To address the problems existing in the prior art, this utility model provides a variable speed hedge cutter, including a cutter handle 1, a speed change button 2 installed on the outside of the cutter handle 1, and a protective mechanism for covering the speed change button 2 on one side of the cutter handle 1 corresponding to the speed change button 2. The protective mechanism includes a threaded plate 3, a protective cover 4, and an internal thread 5. There are two threaded plates 3, both of which are attached to the outside of the cutter handle 1. The protective cover 4 is slidably connected to the outside of the cutter handle 1 and is used to cover the speed change button 2. The internal thread 5 is opened on the inside of the protective cover 4. Several friction blocks 6 for rotating the protective cover 4 are fixedly installed on the outside of the protective cover 4.

[0030] Each threaded plate 3 has a mounting bracket 7 fixedly installed on the side away from the protective cover 4. The cutting machine handle 1 has a mounting plate 8 fixedly installed on the side corresponding to each mounting bracket 7. The mounting bracket 7 is slidably connected to the outside of the mounting plate 8. Each mounting plate 8 has a groove 9 on its outside. Each groove 9 has a spring 11 fixedly connected inside. Each spring 11 has a limit block 10 fixedly connected to its outside. The limit block 10 is located above the mounting bracket 7 and is slidably connected inside the groove 9.

[0031] Each mounting plate 8 has an opening 12 on its exterior, which communicates with the interior of the groove 9. Each opening 12 has a protrusion 13 slidably connected inside to limit the movement range of the limiting block 10. The protrusion 13 is fixedly connected to the exterior of the limiting block 10. The cooperation between the opening 12 and the protrusion 13 limits the movement range of the limiting block 10.

[0032] Each side of the cutting machine handle 1 corresponding to each mounting plate 8 has a threaded hole 14, and each threaded hole 14 is threadedly connected to a threaded rod 15, which is fixedly installed on the lower surface of the mounting plate 8.

[0033] Speed ​​control button 2: Adjusts the working speed of the hedge cutter to adapt to different pruning needs. For example, a low speed can be selected when pruning thinner branches or performing fine pruning, while a high speed can be selected when pruning thicker branches or performing large-area operations, thereby improving work efficiency and pruning quality.

[0034] Protective mechanism: The threaded plate 3 and the internal thread 5 on the inner side of the protective cover 4 are used to fix the position of the protective cover 4 and prevent it from moving accidentally, thereby reliably protecting the speed change button 2. It also facilitates the installation and removal of the protective cover 4. The protective cover 4 directly shields and protects the speed change button 2, preventing deviations in speed adjustment caused by accidental contact during operation, which could affect the cutting work or even cause safety hazards.

[0035] Friction block 6: facilitates workers to rotate the protective cover 4, increases the friction between the hand and the protective cover 4, and improves the efficiency of installing and removing the protective cover 4;

[0036] Mounting bracket 7 and mounting plate 8: Mounting bracket 7 and mounting plate 8 work together to fix threaded plate 3 onto cutting machine handle 1, providing support and positioning, and making it easy to decide whether to install a protective mechanism according to actual needs.

[0037] Groove 9, spring 11 and limiting block 10

[0038] The groove 9 provides sliding and installation space for the limiting block 10 and the spring 11. The spring 11 provides the reset force for the limiting block 10. When the limiting block 10 is pressed to compress the spring 11, releasing the spring 11 will cause the limiting block 10 to return to its original position, thereby achieving automatic locking of the mounting bracket 7 and ensuring the stability of the protective mechanism after installation.

[0039] Opening 12 and protrusion 13: Opening 12 provides a sliding channel for protrusion 13, and at the same time works with protrusion 13 to limit the movement range of limit block 10, so as to prevent the connection between limit block 10 and groove 9 from being disengaged;

[0040] Threaded hole 14 and threaded rod 15: The mounting plate 8 is fixed to the cutting machine handle 1 by threaded connection, and it is easy to disassemble.

[0041] Working principle:

[0042] First, the staff first presses the speed change button 2 installed on the handle 1 of the cutting machine according to the actual trimming task, adjusts the cutting machine to a suitable working speed, moves the protective cover 4 to the thread plate 3, at this time the speed change button 2 is covered by the protective cover 4, and holds the friction block 6 on the outside of the protective cover 4 with their hand. Through the friction provided by the friction block 6, the protective cover 4 can be easily rotated. As the protective cover 4 rotates, the internal thread 5 on its inner side connects with the two thread plates 3. At this time, the installation of the protective cover 4 is completed. The protective cover 4 covers the speed change button 2, avoiding the risk of misoperation.

[0043] The second step is to rotate the protective cover 4 when it is not needed to disconnect the protective cover 4 from the threaded plate 3. Then, move the protective cover 4 to disconnect it from the gear shift button 2. Press the limit block 10 to make it enter the groove 9. At this time, the spring 11 is compressed. Then push the threaded plate 3 upward to disconnect the mounting bracket 7 from the mounting plate 8. Then, rotate the mounting plate 8 to disconnect it from the threaded hole 14. At this time, the mounting plate 8 is disassembled, which makes it easy to decide whether to reinstall the protective mechanism according to actual needs.

[0044] Finally, it should be noted that the above embodiments are merely examples for clearly illustrating the present invention and are not intended to limit the implementation. Those skilled in the art can make other variations or modifications based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations. However, obvious variations or modifications derived therefrom are still within the protection scope of this invention.

Claims

1. A variable-speed hedge cutter, comprising a cutter handle (1), wherein a speed change button (2) is mounted on the outside of the cutter handle (1), characterized in that, The cutting machine handle (1) is provided with a protective mechanism for blocking the speed change button (2) on one side. The protective mechanism includes a threaded plate (3), a protective cover (4) and an internal thread (5). There are two threaded plates (3), both of which are attached to the outside of the cutting machine handle (1). The protective cover (4) is slidably connected to the outside of the cutting machine handle (1) and is used to block the speed change button (2). The internal thread (5) is opened on the inside of the protective cover (4). Among them, the protective cover (4) is fixedly installed with several friction blocks (6) for rotating the protective cover (4).

2. A variable-speed hedge cutter as described in claim 1, characterized in that, Each of the threaded plates (3) is fixedly mounted with a mounting bracket (7) on the side away from the protective cover (4), and the cutting machine handle (1) is fixedly mounted with a mounting plate (8) on the side corresponding to each mounting bracket (7). The mounting bracket (7) is slidably connected to the outside of the mounting plate (8).

3. A variable-speed hedge cutter as described in claim 2, characterized in that, Each of the mounting plates (8) has a groove (9) on its exterior, and a limit block (10) is slidably connected inside each groove (9). The limiting block (10) is located above the mounting bracket (7).

4. A variable-speed hedge cutter as described in claim 3, characterized in that, A spring (11) is fixedly connected inside each of the grooves (9); The spring (11) is fixedly connected to the outside of the limiting block (10).

5. A variable-speed hedge cutter as described in claim 2, characterized in that, Each of the mounting plates (8) has an opening (12) on its exterior, and each opening (12) has a protrusion (13) slidably connected inside to limit the movement range of the limiting block (10). The protrusion (13) is fixedly connected to the outside of the limiting block (10).

6. A variable-speed hedge cutter as described in claim 2, characterized in that, The cutting machine handle (1) has a threaded hole (14) on one side of each mounting plate (8), and each threaded hole (14) is threaded with a threaded rod (15). The threaded rod (15) is fixedly installed on the lower surface of the mounting plate (8).

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