Vibration reduction structure of brush cutter control handle

Abstract

The utility model belongs to the technical field of brush cutters, and particularly relates to a brush cutter control handle damping structure which comprises a fixed seat fixedly sleeved on a transmission rod, an engine fixedly mounted at the tail part of the transmission rod, a long protective cover sleeved on the transmission rod in a clearance manner, and a control handle arranged on the long protective cover, the long protective cover is arranged between the fixing base and the engine, gaps are reserved between the fixing base and the long protective cover, gaps are reserved between the long protective cover and the engine, the fixing base and the long protective cover are connected through more than two damping spring assemblies, and the damping spring assemblies are evenly distributed on the circumference with the axis of the transmission rod as the center. The damping spring assembly comprises a spring and two spring seats, and the two ends of the spring are arranged on the corresponding spring seats in a sleeving mode respectively. According to the utility model, the vibration of the long shield can be effectively reduced, that is, the vibration of the control handle is reduced, the use comfort of operators is improved, the ache of arms of the operators is relieved, the labor intensity is reduced, and the working efficiency is high.

Description

Technical field:

[0001] The utility model belongs to the technical field of brush cutters, in particular to a vibration reduction structure of a brush cutter operating handle. Background technology:

[0002] Small gasoline engine-powered brush cutters are used to trim and cut shrubs and weeds in forestry, orchards, mountains and fields.

[0003] The main components of a brush cutter are the engine, transmission, control handle and cutting head. The transmission is a long round strip, including a transmission rod, connecting the engine and the cutting head. When the engine is working, it outputs kinetic energy to the cutting head through the operation of the transmission. The operator controls the cutting position, moving direction and cutting speed of the brush cutter by holding the control handle with both hands.

[0004] Since the transmission rod in the transmission device is cantilevered and fixed on the engine, the vibration energy of the engine when it is working and the vibration energy of the cutting head during brush cutting operations will be transmitted to the control handle, causing discomfort to the operator. At present, brush cutters generally set a long rubber ring between the transmission device and the control handle to absorb part of the vibration through the deformation of the rubber ring, which has a certain effect, but for professional operators, this vibration reduction structure cannot meet their needs. Long-term use of this type of brush cutter will cause the operator to suffer from arm soreness, finger numbness, increased labor intensity, and reduced work efficiency. Summary of the invention:

[0005] The utility model aims to provide a brush cutter operating handle vibration reduction structure, which can effectively reduce the vibration of the long guard, that is, reduce the vibration of the operating handle, improve the operator's comfort, alleviate the operator's arm pain, reduce labor intensity, and improve work efficiency.

[0006] The utility model is achieved in this way:

[0007] A brush cutter control handle vibration reduction structure comprises a fixing seat fixedly sleeved on a transmission rod, an engine fixedly mounted at the rear of the transmission rod, a long shield gap-sleeved on the transmission rod, and a control handle arranged on the long shield, wherein the long shield is arranged between the fixing seat and the engine, gaps are left between the fixing seat and the long shield, and between the long shield and the engine, and are respectively connected by more than two vibration reduction spring assemblies, the vibration reduction spring assemblies are uniformly distributed on a circle with the axis of the transmission rod as the center, and the vibration reduction spring assembly comprises a spring and two spring seats, and both ends of the spring are respectively sleeved on corresponding spring seats.

[0008] In the above-mentioned vibration reduction structure of the brush cutter operating handle, the head of the transmission rod is connected to the cutting head.

[0009] In the above-mentioned vibration reduction structure of the brush cutter operating handle, the installation structure of the fixing seat can be: the fixing seat is composed of two fixing blocks, and the two ends of the two fixing blocks are respectively fixed by screws.

[0010] In the above-mentioned brush cutter operating handle vibration reduction structure, the mounting structure of the fixing seat may also be: the fixing seat is locked on the transmission rod by means of screws, and the screws pass through the fixing seat and are fastened on the transmission rod.

[0011] In the above-mentioned vibration reduction structure of the brush cutter operating handle, the installation structure of the engine and the transmission rod is as follows: the transmission rod and the engine are fixedly connected through a connecting seat, and the connecting seat includes a cylindrical portion sleeved on the transmission rod and a mounting plate connected to the engine, the cylindrical portion is provided with a notch along the axial direction and is locked by screws, and the mounting plate is fixedly connected to the engine by screws.

[0012] In the above-mentioned vibration reduction structure of the brush cutter operating handle, the spiral radius of the spring is 7.4 mm, the pitch is 3.5 mm, the diameter of the spring steel wire is 2.8 mm, and the number of turns is 8.4 turns.

[0013] In the above-mentioned vibration reduction structure of the brush cutter operating handle, the fixing seat, the engine and the long guard are respectively provided with mounting grooves, and the spring seat is fixedly installed in the corresponding mounting grooves.

[0014] In the above-mentioned vibration reduction structure of the brush cutter operating handle, the spring seat is locked and fixed by a screw, and the screw is threadedly connected to the spring seat.

[0015] In the above-mentioned vibration reduction structure of the brush cutter operating handle, a spiral groove matching the end of the spring is provided on the spring seat.

[0016] In the above-mentioned vibration reduction structure of the brush cutter operating handle, the spiral groove is provided with more than two circles.

[0017] In the above-mentioned vibration reduction structure of the brush cutter operating handle, more than two limit assemblies are respectively provided between the fixed seat and the long guard, and between the long guard and the engine. The limit assemblies are evenly distributed around the circumference with the axis of the transmission rod as the center. The limit assemblies include a circular hole and a limit column with a gap arranged in the circular hole. An elastic ring is provided between the limit column and the side wall of the circular hole and is mounted on the limit column.

[0018] In the above-mentioned vibration reduction structure of the brush cutter operating handle, the material of the elastic ring is rubber or elastic plastic.

[0019] In the above-mentioned vibration reduction structure of the brush cutter operating handle, a mounting groove is provided on the side wall of the limiting column, and the elastic ring is arranged in the mounting groove.

[0020] In the above-mentioned brush cutter operating handle vibration reduction structure, the limiting column between the fixing seat and the long guard is fixedly mounted on the fixing seat, and the limiting column between the long guard and the engine is fixedly mounted on the engine.

[0021] In the above-mentioned vibration reduction structure of the brush cutter operating handle, the limit column is locked and fixed by a screw, the screw is threadedly connected to the limit column, or the screw is tightly fixed on the limit column.

[0022] In the above-mentioned vibration reduction structure of the brush cutter operating handle, a gap is left between the elastic ring and the side wall of the circular hole, and the gap is not larger than the gap between the long guard and the transmission rod.

[0023] In the above-mentioned vibration reduction structure of the brush cutter operating handle, the distance between the elastic ring and the side wall of the circular hole is not less than 3.5 mm.

[0024] In the above-mentioned vibration reduction structure of the brush cutter operating handle, the number of the vibration reduction spring assemblies and the limit assemblies are the same and they are arranged alternately.

[0025] In the above-mentioned brush cutter operating handle vibration reduction structure, the operating handle includes a mounting seat arranged on the long guard and a U-shaped handle tube arranged on the mounting seat, the left end of the U-shaped handle tube is provided with a left handle and the right end is provided with a right handle, and the long guard is provided with a hanging plate.

[0026] In the above-mentioned vibration reduction structure of the brush cutter operating handle, the mounting seat consists of an upper mounting seat and a lower mounting seat, a U-shaped handle tube is arranged between the upper mounting seat and the lower mounting seat, one end of the upper mounting seat and the lower mounting seat are connected by a clamping assembly, and the other end is connected by an adjusting knob, the U-shaped handle tube is located between the clamping assembly and the adjusting knob, a mounting column is provided on the long guard, the lower mounting seat is sleeved outside the mounting column, and the lower end of the adjusting knob passes through the upper mounting seat, the lower mounting seat and the mounting column in sequence. Screw connection.

[0027] In the above-mentioned vibration reduction structure of the brush cutter operating handle, the clamping assembly includes a protrusion arranged on the lower mounting seat and a clamping groove arranged on the upper mounting seat.

[0028] In the above-mentioned vibration reduction structure of the brush cutter operating handle, the right handle is provided with a button for controlling the engine switch and a regulator for controlling the throttle opening.

[0029] The outstanding advantages of the utility model compared with the prior art are:

[0030] 1. There is a gap between the long guard and the transmission rod, between the fixed seat and the long guard, and between the long guard and the engine. The long guard is not in direct contact with the transmission rod, the fixed seat, and the engine, so the vibration transmission is small. The fixed seat and the long guard are connected with the engine through a damping spring assembly, which is a flexible connection. The damping spring assembly absorbs the vibration and the remaining energy when the speed changes sharply, effectively reducing the vibration of the long guard, that is, reducing the vibration of the control handle, improving the operator's comfort, alleviating the soreness of the operator's arm, reducing labor intensity, and high work efficiency.

[0031] 2. In the utility model, two or more limit assemblies are respectively arranged between the fixing seat and the long guard, and between the long guard and the engine. The limit assemblies are evenly distributed around the circumference of the axis of the transmission rod. The limit assemblies include a circular hole and a limit column with a gap arranged in the circular hole. An elastic ring mounted on the limit column is arranged between the limit column and the side wall of the circular hole to limit the displacement of the long guard within a certain range, thereby effectively preventing the resonance caused by short circuit between the engine, the transmission rod and the long guard. Description of the drawings:

[0032] Figure 1 It is a three-dimensional diagram of the utility model;

[0033] Figure 2 It is a three-dimensional diagram of the vibration-damping spring assembly of the utility model;

[0034] Figure 3 It is an exploded view of the vibration damping spring assembly of the utility model;

[0035] Figure 4 It is a cross-sectional view of the fixed seat side limit assembly of the utility model;

[0036] Figure 5 It is a cross-sectional view of the engine side limit assembly of the utility model;

[0037] Figure 6 It is a partial cross-sectional view of the utility model.

[0038] Figure numerals: 1. transmission rod; 2. fixing seat; 3. engine; 4. long guard; 5. spring; 6. spring seat; 7. spiral groove; 8. round hole; 9. limit column; 10. elastic ring; 11. mounting seat; 12. U-shaped handle; 13. left handle; 14. right handle; 15. hanging plate; 16. adjusting knob; 17. mounting column; 18. cutting head. Specific implementation method:

[0039] The present invention is further described below with reference to specific embodiments. Figure 1 —6:

[0040] A brush cutter control handle vibration reduction structure comprises a fixing seat 2 fixedly sleeved on a transmission rod 1, an engine 3 fixedly mounted at the rear of the transmission rod 1, a long shield 4 gap-sleeved on the transmission rod 1, and a control handle arranged on the long shield 4, wherein the long shield 4 is arranged between the fixing seat 2 and the engine 3, gaps are left between the fixing seat 2 and the long shield 4, and between the long shield 4 and the engine 3, and are respectively connected by more than two vibration reduction spring assemblies, the vibration reduction spring assemblies are uniformly distributed around the circumference of the axis of the transmission rod 1, and the vibration reduction spring assembly comprises a spring 5 and two spring seats 6, and both ends of the spring 5 are respectively sleeved on the corresponding spring seats 6.

[0041] like Figure 1-6 As shown, there is a gap between the long shield 4 and the transmission rod 1 of the utility model, and there are gaps between the fixing seat 2 and the long shield 4, and between the long shield 4 and the engine 3. The long shield 4 is not in direct contact with the transmission rod 1, the fixing seat 2, and the engine 3, and the vibration transmission is small. The fixing seat 2 and the long shield 4, and the long shield 4 and the engine 3 are respectively connected by a vibration-damping spring assembly, which is a flexible connection. The vibration-damping spring assembly absorbs the residual energy when the vibration and the speed change sharply, effectively reducing the vibration of the long shield 4, that is, reducing the vibration of the operating handle, improving the operator's comfort, alleviating the soreness of the operator's arm, reducing labor intensity, and high work efficiency.

[0042] Furthermore, the head of the transmission rod 1 is connected to the cutting head 18 .

[0043] The installation structure of the fixing base 2: The fixing base 2 is composed of two fixing blocks, and the two ends of the two fixing blocks are respectively fixed by screws.

[0044] The installation structure of the engine 3 and the transmission rod 1: the transmission rod 1 and the engine 3 are fixedly connected via a connecting seat, and the connecting seat includes a cylindrical portion sleeved on the transmission rod 1 and a mounting plate connected to the engine 3, the cylindrical portion is provided with a notch along the axial direction and is locked by screws, and the mounting plate is fixedly connected to the engine 3 by screws.

[0045] Preferably, the spiral radius of the spring 5 is 7.4 mm, the pitch is 3.5 mm, the diameter of the spring wire is 2.8 mm, the number of turns is 8.4 turns, and the damping coefficient is appropriate, which effectively isolates low-frequency vibration energy.

[0046] The installation structure of the spring seat 6: the fixing seat 2, the engine 3 and the long shield 4 are respectively provided with installation grooves, and the spring seat 6 is fixedly installed in the corresponding installation grooves.

[0047] The fixing structure of the spring seat 6: the spring seat 6 is fixed by screw locking, and the screw is threadedly connected to the spring seat 6.

[0048] The connection structure between the spring seat 6 and the spring 5 is as follows: Figure 2 , 3 As shown, the spring seat 6 is provided with a spiral groove 7 which is matched with the end of the spring 5 .

[0049] Preferably, the spiral groove 7 is provided with more than two turns. In this embodiment, the spiral groove 7 is provided with two turns.

[0050] In order to limit the displacement of the long shield 4 within a certain range, such as Figure 4 , 5 As shown, more than two limiting components are respectively arranged between the fixing seat 2 and the long shield 4, and between the long shield 4 and the engine 3. The limiting components are evenly distributed around the axis of the transmission rod 1. The limiting components include a circular hole 8 and a limiting column 9 with a gap arranged in the circular hole 8. An elastic ring 10 is provided between the limiting column 9 and the side wall of the circular hole 8 and is sleeved on the limiting column 9. The limiting column 9 and the elastic ring 10 can effectively prevent the engine 3, the transmission rod 1 and the long shield 4 from short-circuiting and generating resonance.

[0051] Preferably, the elastic ring 10 is made of rubber or elastic plastic. In this embodiment, the elastic ring 10 is made of rubber.

[0052] The installation structure of the elastic ring 10 is as follows: Figure 4 , 5 As shown, a mounting groove is provided on the side wall of the limiting column 9, and the elastic ring 10 is arranged in the mounting groove.

[0053] For ease of installation, the limiting column 9 between the fixing seat 2 and the long shield 4 is fixedly mounted on the fixing seat 2 , and the limiting column 9 between the long shield 4 and the engine 3 is fixedly mounted on the engine 3 .

[0054] Installation structure of the limiting column 9: the limiting column 9 is fixed by screw locking, the screw is threadedly connected to the limiting column 9, or the screw is tightly fixed on the limiting column 9.

[0055] Furthermore, a gap is left between the elastic ring 10 and the side wall of the circular hole 8 , and the gap is no larger than the gap between the long shield 4 and the transmission rod 1 .

[0056] Preferably, the distance between the elastic ring 10 and the side wall of the circular hole 8 is not less than 3.5 mm.

[0057] In order to achieve a better vibration reduction effect, the number of the vibration reduction spring assemblies and the limit assemblies are the same and they are arranged alternately.

[0058] The structure of the joystick: Figure 1 , 6As shown, the operating handle includes a mounting seat 11 arranged on the long shield 4 and a U-shaped handle tube 12 arranged on the mounting seat 11. The left end of the U-shaped handle tube 12 is provided with a left handle 13, and the right end is provided with a right handle 14. The long shield 4 is provided with a hanging plate 15, and the brush cutter is carried on the operator's back through the hanging plate 15.

[0059] The installation structure of the mounting seat 11 is as follows: Figure 1 , 6 As shown, the mounting seat 11 is composed of an upper mounting seat and a lower mounting seat, and a U-shaped handlebar 12 is arranged between the upper mounting seat and the lower mounting seat. The upper mounting seat and the lower mounting seat are connected at one end by a clamping assembly and at the other end by an adjusting knob 16. The U-shaped handlebar 12 is located between the clamping assembly and the adjusting knob 16. The long shield 4 is provided with a mounting column 17, and the lower mounting seat is sleeved outside the mounting column 17. The lower end of the adjusting knob 16 passes through the upper mounting seat, the lower mounting seat and the mounting column 17 in sequence. The angle of the U-shaped handlebar 12 can be adjusted by loosening the adjusting knob 16. After adjusting to a suitable angle, tighten the adjusting knob 16.

[0060] Furthermore, the clamping assembly includes a protrusion arranged on the lower mounting seat and a clamping groove arranged on the upper mounting seat.

[0061] Furthermore, the right handle 14 is provided with a button for controlling the switch of the engine 3 and a regulator for controlling the throttle opening.

[0062] The vibration value of the left handle 13 and the right handle 14 of the utility model can be controlled at 3m / s 2 The following has an obvious vibration reduction effect. The utility model brush cutter control handle has good vibration reduction effect, small vibration and good comfort in use.

[0063] The above embodiment is only one of the preferred embodiments of the present utility model, and is not intended to limit the scope of implementation of the present utility model. Therefore, any equivalent changes made based on the shape, structure, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A brush cutter operating handle vibration reduction structure, characterized in that: The invention comprises a fixing seat (2) fixedly mounted on a transmission rod (1), an engine (3) fixedly mounted on the rear of the transmission rod (1), a long shield (4) gap-mounted on the transmission rod (1), and a control handle arranged on the long shield (4); the long shield (4) is arranged between the fixing seat (2) and the engine (3); gaps are left between the fixing seat (2) and the long shield (4), and between the long shield (4) and the engine (3), and are respectively connected by two or more damping spring assemblies, the damping spring assemblies being uniformly distributed on a circle with the axis of the transmission rod (1) as the center; the damping spring assembly comprises a spring (5) and two spring seats (6), and the two ends of the spring (5) are respectively mounted on corresponding spring seats (6).

2. A brush cutter operating handle vibration reduction structure according to claim 1, characterized in that: The fixing seat (2), the engine (3) and the long shield (4) are respectively provided with mounting grooves, and the spring seat (6) is fixedly installed in the corresponding mounting grooves.

3. The brush cutter operating handle vibration reduction structure according to claim 1, characterized in that: The spring seat (6) is provided with a spiral groove (7) which matches the end of the spring (5).

4. The brush cutter operating handle vibration reduction structure according to claim 1, characterized in that: Two or more limit assemblies are respectively arranged between the fixing seat (2) and the long shield (4), and between the long shield (4) and the engine (3). The limit assemblies are evenly distributed around the circumference of a circle with the axis of the transmission rod (1) as the center. The limit assemblies include a circular hole (8) and a limit column (9) with a gap arranged in the circular hole (8). An elastic ring (10) sleeved on the limit column (9) is arranged between the limit column (9) and the side wall of the circular hole (8).

5. A brush cutter operating handle vibration reduction structure according to claim 4, characterized in that: The limiting column (9) between the fixing seat (2) and the long guard (4) is fixedly mounted on the fixing seat (2), and the limiting column (9) between the long guard (4) and the engine (3) is fixedly mounted on the engine (3).

6. A brush cutter operating handle vibration reduction structure according to claim 4, characterized in that: A gap is left between the elastic ring (10) and the side wall of the circular hole (8), and the gap is no larger than the gap between the long protective cover (4) and the transmission rod (1).

7. A brush cutter operating handle vibration reduction structure according to claim 4, characterized in that: The damping spring assemblies and the limiting assemblies are of the same number and are arranged alternately.

8. The brush cutter operating handle vibration reduction structure according to claim 1, characterized in that: The operating handle comprises a mounting seat (11) arranged on a long protective cover (4) and a U-shaped handle tube (12) arranged on the mounting seat (11); a left handle (13) is arranged at the left end of the U-shaped handle tube (12) and a right handle (14) is arranged at the right end; and a hanging plate (15) is arranged on the long protective cover (4).

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