Brush cutter with a vibration-damping handle

Abstract

The present application provides a kind of brush cutter with damping handle, including transmission rod, damping handle is set on transmission rod, damping handle includes connecting seat, damping spring, handle seat, operating handle, connecting seat includes the connecting upper seat body and connecting lower seat body of transmission rod clamping, top surface of connecting upper seat body is equipped with several lower installation slot, lower spring seat is inserted on each lower installation slot, handle seat is set on the top of connecting seat, handle seat includes the handle lower seat body and handle upper seat body of operating handle clamping, bottom surface of handle lower seat body is equipped with several upper installation slot, upper spring seat is arranged in upper installation slot, the both ends of damping spring are respectively set on lower spring seat and upper spring seat.For optimizing operation experience, the present brush cutter adopts multistage damping design, can effectively block vibration transmission path, let operator both hands vibration sense significantly weaken, both can avoid hand muscle premature fatigue, and can greatly improve the comfort when working.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of brush cutters, in particular to a brush cutter with a vibration-reducing handle. BACKGROUND

[0002] As a common garden pruning device, brush cutters play an important role in many fields. In landscaping, they can quickly prune shrubs and weeds, keeping the garden landscape neat and beautiful. In terms of courtyard maintenance, they help residents easily clean weeds and shrubs in the courtyard, creating a comfortable living environment. In highway cleaning work, they can efficiently remove vegetation on both sides of the road, ensuring traffic safety and reducing safety hazards caused by vegetation obstructing visibility or affecting road facilities. In the field of forest fire prevention, the firebreaks cleared by brush cutters can effectively prevent the spread of fire, providing strong support for forest fire prevention and control.

[0003] The existing Chinese patent with the authorization announcement number CN210868770U discloses a brush cutting and grass cutting all-in-one machine with a convenient exchange of different model battery packs, which includes a support pipe, a machine head assembly with a blade or a grass cutting rope, a handle, a machine shell, a battery pack, the handle is fixedly arranged at the middle part of the support pipe, an installation slot with an upward opening is formed on the machine shell, a battery support with a battery accommodating slot is detachably connected to the machine shell and located in the installation slot, the battery pack is inserted into the battery accommodating slot, and a transparent cover for covering the opening of the installation slot is detachably connected to the machine shell.

[0004] The existing technical solution in the above has the following defects: In the actual working scene of the brush cutter, the operator needs to hold the two free ends of the handle with both hands, adjust the handle posture by arm force, and thus realize the position adjustment and operation action control of the machine head assembly. Since the handle and the support pipe are rigidly connected, the vibration generated during the operation of the device will be directly transmitted to the handle along the support pipe and quickly act on the operator's hands. This vibration transmission path not only significantly enhances the vibration sensation of the operator's hands, but also easily causes hand muscle fatigue, greatly reduces the operation comfort during long-time operation, and adversely affects the operation efficiency and the operator's experience. SUMMARY

[0005] The present application solves the problem of poor comfort in the prior art by providing a brush cutter with a vibration-reducing handle.

[0006] The above invention purpose of the present application is realized by the following technical scheme: a brush cutter with a damping handle, comprising a transmission rod, a damping handle arranged on the transmission rod, the damping handle comprising a connecting seat, damping springs, a handle seat and an operating handle, the connecting seat comprising an upper connecting seat body and a lower connecting seat body clamping the transmission rod, a plurality of lower installation grooves are formed on the top surface of the upper connecting seat body, and a lower spring seat is arranged in each lower installation groove, the handle seat is arranged directly above the connecting seat, and the handle seat comprises a lower handle seat body and an upper handle seat body clamping the operating handle, a plurality of upper installation grooves are formed on the bottom surface of the lower handle seat body, and an upper spring seat is arranged in each upper installation groove, and the two ends of the damping springs are respectively sleeved on the lower spring seat and the upper spring seat.

[0007] The present application is further provided that: the lower spring seat comprises a lower nut located at the center and a lower seat shell wrapped outside the lower nut, a lower ring groove is formed on the outer wall of the lower nut in a circumferential direction, a lower embedded ring is arranged on the inner wall of the lower seat shell and embedded with the lower ring groove, the lower seat shell is made of rubber material, a lower spring groove is formed on the outer wall of the lower seat shell, and the lower part of the damping spring is sleeved on the lower seat shell and embedded with the lower spring groove.

[0008] The present application is further provided that: a lower through hole is formed on the bottom surface of the connecting seat and penetrates the upper connecting seat body and the lower connecting seat body, a lower screw is arranged in the lower through hole and threadedly connected with the lower nut, a lower spring washer is sleeved on the lower screw, and the lower spring washer is located between the connecting seat and the head of the lower screw.

[0009] The present application is further provided that: the upper spring seat comprises an upper nut located at the center and an upper seat shell wrapped outside the upper nut, an upper ring groove is formed on the outer wall of the upper nut in a circumferential direction, an upper embedded ring is arranged on the inner wall of the upper seat shell and embedded with the upper ring groove, the upper seat shell is made of rubber material, and an upper spring groove is formed on the outer wall of the upper seat shell, and the upper part of the damping spring is sleeved on the upper seat shell and embedded with the upper spring groove.

[0010] The present application is further provided that: an upper countersunk head hole is formed on the top surface of the handle seat and penetrates the upper handle seat body and the lower handle seat body, an upper screw is arranged in the upper countersunk head hole and threadedly connected with the upper nut, an upper spring washer is sleeved on the upper screw, and the upper spring washer is located between the head of the upper screw and the handle seat.

[0011] The application is further provided with a damping seat on the top surface of the connecting upper seat body, a gradually expanding guide rod hole and a middle oil cavity are sequentially formed in the center of the top surface of the damping seat, a middle piston plate is slidably arranged in the middle oil cavity, a plurality of side oil cavities are formed on the top surface of the damping seat and are evenly distributed on the outside of the middle oil cavity, a plurality of oil communication holes are formed in the damping seat for connecting the middle oil cavity and the side oil cavities, a side piston plate is slidably arranged in the side oil cavity, a hollow fixing plate is arranged on the top surface of the damping seat, a return spring is arranged between the fixing plate and the side piston plate, and damping oil is filled in the middle oil cavity and the side oil cavity.

[0012] The application is further provided with a plurality of positioning holes formed on the outer side wall of the operating handle, and a plurality of positioning columns are arranged on the top surface of the handle lower seat body and are inserted into the positioning holes.

[0013] The application is further provided with a rod sleeve made of rubber and slidably arranged on the transmission rod, and the connecting lower seat body and the connecting upper seat body clamp the rod sleeve and the transmission rod.

[0014] The application is further provided with a plurality of lock rod holes formed on the rod surface of the transmission rod and evenly distributed along the axial direction of the transmission rod, a through hole is radially formed on the rod sleeve and is aligned with the lock rod hole, a convex cylinder is arranged on the connecting lower seat body, a cylinder cavity is formed on the bottom surface of the convex cylinder, an opening hole is formed on the top wall of the cylinder cavity and is aligned with the through hole, a hollow cylinder cover is arranged on the bottom surface of the convex cylinder, a lock rod column is arranged in the center of the cylinder cavity, the upper end of the lock rod column sequentially penetrates the opening hole and the through hole and is inserted into the lock rod hole of the transmission rod, and the lower end of the lock rod column penetrates the cylinder cover.

[0015] The application is further provided with a sliding disc coaxially arranged on the middle part of the lock rod column and slidably matched with the cylinder cavity, a top disc spring is sleeved on the lock rod column, the upper end of the top disc spring abuts against the top wall of the cylinder cavity, the lower end of the top disc spring abuts against the sliding disc, a hollow guide cylinder is coaxially arranged on the end surface of the cylinder cover away from the convex cylinder, a plurality of lock column guide holes are formed on the outer side wall of the guide cylinder, a hollow rotating shaft is coaxially arranged on the end of the guide cylinder away from the cylinder cover, the lower end of the lock rod column sequentially penetrates the hollow parts of the guide cylinder and the rotating shaft, a plurality of lock column clamping holes are formed on the column surface of the lock rod column and can be aligned with the lock column guide holes, a plurality of sliding rails are arranged on the end surface of the cylinder cover away from the convex cylinder, a lock column sliding block is slidably arranged on the sliding rail and can penetrate the lock column guide hole and be inserted into the lock column clamping hole, a driving sliding rod is arranged on the end surface of the lock column sliding block away from the cylinder cover, a driving plate is rotatably arranged on the rotating shaft, a plurality of arc-shaped driving holes are formed on the driving plate along the thickness direction and are slidably matched with the driving sliding rod, and the distance from the inner end of the driving hole to the center of the driving plate is less than the distance from the outer end of the driving hole to the center of the driving plate.

[0016] In summary, the application has the following beneficial technical effects:

[0017] (1) When the brush cutter works, the vibration generated by the transmission rod is transmitted to the connecting seat through the rod sleeve, the rod sleeve made of rubber material acts as an intermediate medium between the transmission rod and the connecting seat, which can reduce the transmission of vibration to the connecting seat; a damping spring is arranged between the connecting seat and the handle seat, and the damping spring can reduce the transmission of vibration to the handle seat. In order to optimize the operation experience, the brush cutter adopts multi-stage damping design, which can effectively block the vibration transmission path, so that the vibration sensation of the operator's hands is obviously weakened, which can not only avoid the premature fatigue of the hands, but also greatly improve the comfort during operation;

[0018] (2) In the embodiment, the handle seat will move up and down due to vibration, and the downward movement of the handle seat will push the middle piston plate downward through the piston rod, and then the damping oil in the middle oil cavity will enter the side oil cavity through the oil hole, and then the side piston plate will be pushed upward, and the reset spring will be in a compressed state; the handle seat goes up, the elastic force generated by the reset spring resets the side piston plate to go down, and the damping oil in the side oil cavity enters the middle oil cavity through the oil hole, and then the middle piston plate is pushed upward. In this process, the damping oil generates damping force through its own viscosity, converts the mechanical energy of vibration into heat energy and dissipates it, which will weaken the transmission of vibration, and also inhibit the rebound speed of the damping spring;

[0019] (3) The brush cutter with a damping handle can avoid the defect that the fixed handle is easy to cause "forced posture" to a certain extent, can adapt to operators of different heights and arm lengths, and can also adapt to different operation scenes such as low operation (such as ground mowing) and high operation (such as pruning shrubs). BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is a structure schematic view of the brush cutter with a damping handle in the present application;

[0021] Figure 2 is a structure schematic view of the transmission rod and the damping handle in the present application;

[0022] Figure 3 is a sectional structure view of the brush cutter with a damping handle in the present application;

[0023] Figure 4 is a local explosion structure schematic view of the damping handle in the present application;

[0024] Figure 5 is a structure schematic view of the operation handle in the present application;

[0025] Figure 6 is a sectional structure view of the brush cutter with a damping handle in the present application;

[0026] Figure 7 is Figure 6 is an enlarged view of A in

[0027] Figure 8 is Figure 6 is an enlarged view of B in FIG. 1;

[0028] Figure 9 is a schematic view of a partial explosion structure of the damping handle.

[0029] In the above drawings: 1, transmission rod; 2, damping handle; 3, rod sleeve; 4, connecting seat; 5, connecting lower seat body; 6, connecting upper seat body; 7, lower mounting groove; 8, lower spring seat; 81, lower nut; 82, lower ring groove; 83, lower seat shell; 84, lower embedded ring; 85, lower spring groove; 9, damping spring; 10, lower through hole; 11, lower screw; 12, lower spring washer; 13, handle seat; 14, handle lower seat body; 15, handle upper seat body; 16, operating handle; 17, positioning hole; 18, positioning column; 19, upper mounting groove; 20, upper spring seat; 201, upper nut; 202, upper ring groove; 203, upper seat shell; 204, upper embedded ring; 205, upper spring groove; 21, upper countersunk hole; 22, upper screw; 23, upper spring washer; 24, damping seat; 25, guide rod hole; 26, middle oil cavity; 27, middle piston plate; 28, side oil cavity; 29, oil passage hole; 30, side piston plate; 31, fixed plate; 32, return spring; 33, seat groove; 34, piston rod; 35, lock rod hole; 36, through hole; 37, convex cylinder; 38, cylinder cavity; 39, opening; 40, cylinder cover; 41, lock rod column; 42, sliding disc; 43, top disc spring; 44, guide cylinder; 45, lock column guide hole; 46, lock column clamping hole; 47, sliding rail; 471, rail seat; 472, rail; 48, lock column sliding block; 481, sliding groove; 49, rotating shaft; 50, driving plate; 51, driving hole; 511, inner end; 512, outer end; 52, driving sliding rod. DETAILED DESCRIPTION

[0030] In order to make the technical means, creative features, purposes and effects of the present application more clear and easy to understand, the present application is further described below in combination with the drawings and specific embodiments.

[0031] As shown in Figure 1 and 2 , the present application proposes a brush cutter with a damping handle, which comprises a transmission rod 1 and a damping handle 2 arranged on the transmission rod 1, and a rod sleeve 3 of rubber material is slidingly arranged on the transmission rod 1.

[0032] As shown in Figure 1 and 3 , the damping handle 2 comprises a connecting seat 4, a damping spring 9, a handle seat 13 and an operating handle 16.

[0033] As shown in Figure 2 and 3 , the damping handle 2 comprises a connecting seat 4, a damping spring 9, a handle seat 13 and an operating handle 16.As shown, the adjustable connection seat 4 is arranged on the transmission rod 1, the connection seat 4 includes a connection upper seat body 6 and a connection lower seat body 5, the connection lower seat body 5 and the connection upper seat body 6 clamp the rod sleeve 3 and the transmission rod 1, the rod sleeve 3 made of rubber has damping characteristics, and the rod sleeve 3 serves as an intermediate medium of the transmission rod 1 and the connection seat 4, thereby reducing vibration transmission to the connection seat 4.

[0034] As shown in Figure 3 and 4 , four lower installation grooves 7 are formed in the top surface of the connection upper seat body 6, the four lower installation grooves 7 are located at the four corners of the connection seat 4, and the cross section of the lower installation groove 7 is a round head rectangle. A lower spring seat 8 is inserted into each lower installation groove 7, the lower spring seat 8 includes a lower nut 81 and a lower seat shell 83, the lower nut 81 is located at the center of the lower spring seat 8, the lower nut 81 is a hexagonal nut, a lower ring groove 82 is formed in the outer side wall of the lower nut 81 in a circumferential direction, the lower seat shell 83 is wrapped on the outer side of the lower nut 81, the lower seat shell 83 is made of rubber, a lower embedding ring 84 is integrally formed on the inner wall of the lower seat shell 83 and embedded with the lower ring groove 82, so as to limit the axial relative sliding between the lower nut 81 and the lower seat shell 83. A lower spring groove 85 is formed in the outer side wall of the lower seat shell 83, a lower part of a damping spring 9 is sleeved on the lower seat shell 83, the damping spring 9 is embedded with the lower spring groove 85, and the connection stability between the damping spring 9 and the lower seat shell 83 is improved.

[0035] As shown in Figure 3 and 4 , a lower through hole 10 is formed in the bottom surface of the connection seat 4 and corresponds to the lower installation groove 7, the lower through hole 10 penetrates the connection upper seat body 6 and the connection lower seat body 5 at the same time, and a lower screw 11 is threadedly connected with the lower nut 81 and penetrates the lower through hole 10. A lower spring washer 12 is sleeved on the lower screw 11, the lower spring washer 12 is located between the connection seat 4 and the head of the lower screw 11, the lower spring washer 12 is compressed and elastically deformed during installation, continuously applies an axial pre-tightening force to the lower screw 11, and effectively inhibits the loosening of the lower screw 11 caused by vibration.

[0036] As shown in Figure 5 and 6 , the handle seat 13 is arranged directly above the connection seat 4, the handle seat 13 includes a handle lower seat body 14 and a handle upper seat body 15, the handle lower seat body 14 and the handle upper seat body 15 clamp the operation handle 16, two positioning holes 17 are formed in the outer side wall of the operation handle 16, and two positioning columns 18 are fixedly connected to the top surface of the handle lower seat body 14 and inserted into the positioning holes 17.

[0037] As shown in Figure 3As shown, the bottom surface of the handle lower seat body 14 is provided with four upper mounting grooves 19, and the upper spring seat 20 is arranged in the upper mounting groove 19. The upper spring seat 20 comprises an upper nut 201 and an upper seat shell 203. The upper nut 201 is located at the center of the upper spring seat 20. The upper nut 201 is a hexagonal nut. An upper ring groove 202 is circumferentially formed on the outer side wall of the upper nut 201. The upper seat shell 203 is wrapped on the outer side of the upper nut 201. The upper seat shell 203 is made of rubber. An upper embedded ring 204 is integrally formed on the inner wall of the upper seat shell 203 and is embedded with the upper ring groove 202 to limit the axial relative sliding between the upper nut 201 and the upper seat shell 203. An upper spring groove 205 is formed on the outer side wall of the upper seat shell 203. The upper part of the damping spring 9 is sleeved on the upper seat shell 203 and is embedded with the upper spring groove 205 to improve the connection stability between the damping spring 9 and the upper seat shell 203.

[0038] As shown in Figure 3 , the top surface of the handle seat 13 is provided with an upper countersunk hole 21 corresponding to the upper mounting groove 19. The upper countersunk hole 21 penetrates the handle upper seat body 15 and the handle lower seat body 14 at the same time. An upper screw 22 is arranged in the upper countersunk hole 21 and is threadedly connected with the upper nut 201. An upper spring washer 23 is sleeved on the upper screw 22. The upper spring washer 23 is located between the head of the upper screw 22 and the handle seat 13. The upper spring washer 23 is compressed to produce elastic deformation during installation, continuously applies an axial pre-tightening force to the upper screw 22, and effectively inhibits the loosening of the upper screw 22 caused by vibration.

[0039] When the brush cutter works, the vibration generated by the transmission rod 1 is transmitted to the connecting seat 4 through the rod sleeve 3. The rod sleeve 3 made of rubber serves as an intermediate medium between the transmission rod 1 and the connecting seat 4, which can reduce the vibration transmitted to the connecting seat 4. The damping spring 9 is arranged between the connecting seat 4 and the handle seat 13, which can reduce the vibration transmitted to the handle seat 13. In order to optimize the operation experience, the brush cutter adopts multi-stage damping design, which can effectively block the vibration transmission path, so that the vibration sensation of the operator's hands is significantly weakened, which can not only avoid the premature fatigue of the hands, but also greatly improve the comfort during operation.

[0040] As shown in Figure 6 and 7 , the top surface of the connecting upper seat body 6 is fixedly connected with a pair of cylindrical damping seats 24. A gradually expanding guide rod hole 25 and a middle oil cavity 26 are sequentially formed in the center of the top surface of the damping seat 24 downward. The guide rod hole 25 is a circular hole. The middle oil cavity 26 is a cylindrical chamber. The diameter of the middle oil cavity 26 is larger than that of the guide rod hole 25. The middle oil cavity 26 is filled with damping oil. A middle piston plate 27 made of rubber is slidably arranged in the middle oil cavity 26.

[0041] As shown in Figure 6 and 7As shown, the top surface of the damping seat 24 is provided with four side oil chambers 28, which are evenly distributed outside the middle oil chamber 26. Four oil communication holes 29 are evenly distributed in the damping seat 24. A side piston plate 30 is slidably arranged in the side oil chamber 28. A hollow fixing plate 31 is connected to the top surface of the damping seat 24 by screws 22. A return spring 32 is arranged between the fixing plate 31 and the side piston plate 30, and the two ends of the return spring 32 are welded to the fixing plate 31 and the side piston plate 30, respectively.

[0042] As shown in Figure 6 and 7 two seat grooves 33 are formed in the bottom surface of the handle lower seat body 14, and the seat grooves 33 are used for inserting the top of the damping seat 24. A piston rod 34 is fixedly connected to the groove bottom of the seat groove 33, and the piston rod 34 penetrates the fixing plate 31 and the guide rod hole 25 in sequence. The guide rod hole 25 is in sliding fit with the piston rod 34, and the piston rod 34 is used for pushing the middle piston plate 27 downward.

[0043] In this embodiment, the handle seat 13 will move up and down due to vibration. When the handle seat 13 moves downward, the middle piston plate 27 is pushed downward by the piston rod 34, and then the damping oil in the middle oil chamber 26 enters the side oil chamber 28 through the oil communication hole 29. Then, the side piston plate 30 is pushed upward, and the return spring 32 is in a compressed state. When the handle seat 13 moves upward, the elastic force generated by the return spring 32 will push the side piston plate 30 downward, and the damping oil in the side oil chamber 28 enters the middle oil chamber 26 through the oil communication hole 29. Then, the middle piston plate 27 is pushed upward. In this process, the damping oil generates a damping force through its own viscosity, converts the mechanical energy of vibration into heat energy, and dissipates the heat energy. Therefore, the transmission of vibration will be weakened, and the rebound speed of the damping spring 9 will also be inhibited.

[0044] As shown in Figure 8 and 9 A plurality of lock rod holes 35 are formed in the rod surface of the transmission rod 1, and the plurality of lock rod holes 35 are evenly distributed along the axial direction of the transmission rod 1. A through hole 36 is radially formed in the rod sleeve 3, and the through hole 36 is used for aligning with the lock rod hole 35. A cylindrical convex cylinder 37 is fixedly connected to the bottom surface of the connecting lower seat body 5. A cylinder cavity 38 with a circular cross section is formed in the bottom surface of the convex cylinder 37. An opening hole 39 is formed in the top wall of the cylinder cavity 38, and is used for aligning with the through hole 36. A hollow cylinder cover 40 is connected to the bottom surface of the convex cylinder 37 by screws 22, and the cylinder cover 40 is a circular ring plate body.

[0045] As shown in Figure 8 and 9As shown, the center of the barrel cavity 38 is provided with a cylindrical lock rod column 41, the upper end of the lock rod column 41 is inserted into the lock rod hole 35 of the transmission rod 1 in sequence through the opening 39 and the through hole 36, and the lower end of the lock rod column 41 penetrates the barrel cover 40. The middle part of the lock rod column 41 is coaxially fixedly connected with a sliding disc 42, the sliding disc 42 is slidingly arranged in the barrel cavity 38, and the sliding disc 42 is disc-shaped. A top disc spring 43 is sleeved on the lock rod column 41, the upper end of the top disc spring 43 abuts against the top wall of the barrel cavity 38, the lower end of the top disc spring 43 abuts against the sliding disc 42, and the top disc spring 43 is used to push the sliding disc 42 downward, thereby driving the top of the lock rod column 41 to be pulled out of the lock rod hole 35 and slide into the through hole 36.

[0046] As shown in Figure 8 and 9 , the end face of the barrel cover 40 away from the convex cylinder 37 is coaxially fixedly connected with a hollow guide cylinder 44, and two lock column guide holes 45 are symmetrically formed in the outer side wall of the guide cylinder 44. The lock rod column 41 penetrates the hollow part of the guide cylinder 44, and two lock column clamping holes 46 are symmetrically formed in the cylindrical surface of the lock rod column 41, which can be aligned with the lock column guide holes 45.

[0047] As shown in Figure 8 and 9 , the end face of the barrel cover 40 away from the convex cylinder 37 is coaxially fixedly connected with a hollow guide cylinder 44, and two lock column guide holes 45 are symmetrically formed in the outer side wall of the guide cylinder 44. The lock rod column 41 penetrates the hollow part of the guide cylinder 44, and two lock column clamping holes 46 are symmetrically formed in the cylindrical surface of the lock rod column 41, which can be aligned with the lock column guide holes 45.

[0048] As shown in Figure 8 and 9 , the end face of the barrel cover 40 away from the convex cylinder 37 is coaxially fixedly connected with a hollow guide cylinder 44, and two lock column guide holes 45 are symmetrically formed in the outer side wall of the guide cylinder 44. The lock rod column 41 penetrates the hollow part of the guide cylinder 44, and two lock column clamping holes 46 are symmetrically formed in the cylindrical surface of the lock rod column 41, which can be aligned with the lock column guide holes 45.

[0049] As shown in Figure 8 and 9As shown, two arc-shaped driving holes 51 are formed in the driving plate 50 along the thickness direction, and the distance from the inner end 511 of the driving hole 51 to the center of the driving plate 50 is less than the distance from the outer end 512 of the driving hole 51 to the center of the driving plate 50. The end surface of the lock post slider 48 away from the cylinder cover 40 is fixedly connected with a driving slide rod 52, the driving slide rod 52 penetrates the driving hole 51 in sliding fit, and the driving slide rod 52 limits the separation of the driving plate 50 and the driving slide rod 52 by means of slotted sleeve spring setting. When the driving plate 50 rotates to make the driving slide rod 52 slide from the inner end 511 of the driving hole 51 to the outer end 512 of the driving hole 51, the lock post slider 48 will be extracted from the lock post clamping hole 46.

[0050] When the damping handle 2 needs to be adjusted in position in the embodiment:

[0051] S1, the worker rotates the driving plate 50 to make the driving slide rod 52 slide from the inner end 511 of the driving hole 51 to the outer end 512 of the driving hole 51, which will drive the lock post slider 48 to be extracted from the lock post clamping hole 46, the disc spring 43 pushes the sliding disc 42 to move downward, and then drives the top of the lock rod post 41 to be extracted from the lock rod hole 35 and slide into the through hole 36;

[0052] S2, the worker adjusts the position of the damping handle 2 until the through hole 36 is aligned with the lock rod hole 35 at the appropriate position, then presses the bottom of the lock rod post 41 to push the lock rod post 41 to move upward and insert into the lock rod hole 35, at this time the lock post clamping hole 46 is aligned with the lock post guide hole 45;

[0053] S3, the worker rotates the driving plate 50 to make the driving slide rod 52 slide from the outer end 512 of the driving hole 51 to the inner end 511 of the driving hole 51, which will drive the lock post slider 48 to pass through the lock post guide hole 45 and insert into the lock post clamping hole 46, at this time the lock rod post 41 is limited to axial movement, and at this time the lock rod post 41 remains inserted into the lock rod hole 35.

[0054] The brush cutter with a damping handle avoids the defect that the fixed handle is easy to cause "forced posture" to a certain extent by arranging the damping handle 2 with adjustable position on the transmission rod 1, can adapt to operators with different heights and arm lengths, and can also adapt to different operation scenes such as low operation (such as ground mowing) and high operation (such as cutting shrubs).

[0055] Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the present application but not limit the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the purpose and scope of the present application, and all of them should be covered in the scope of the claims of the present application.

Claims

1. A brush cutter with a damping handle, comprising a transmission rod (1) and a damping handle (2) arranged on the transmission rod (1), characterized in that: The damping handle (2) comprises a connecting seat (4), damping springs (9), a handle seat (13) and an operating handle (16), the connecting seat (4) comprises a connecting upper seat body (6) and a connecting lower seat body (5) for clamping the transmission rod (1), a plurality of lower spring seats (8) are arranged on the top surface of the connecting upper seat body (6), the handle seat (13) is arranged directly above the connecting seat (4), the handle seat (13) comprises a handle lower seat body (14) and a handle upper seat body (15) for clamping the operating handle (16), a plurality of upper spring seats (20) are arranged in a plurality of upper installation grooves (19) formed on the bottom surface of the handle lower seat body (14), and the two ends of the damping springs (9) are sleeved on the lower spring seats (8) and the upper spring seats (20) respectively; A rod sleeve (3) made of rubber is sleeved on the transmission rod (1), the connecting lower seat body (5) and the connecting upper seat body (6) clamp the rod sleeve (3) and the transmission rod (1), a plurality of lock rod holes (35) are formed on the rod surface of the transmission rod (1) and are uniformly distributed along the axial direction of the transmission rod (1), a plurality of through holes (36) are formed on the rod sleeve (3) and are radially aligned with the lock rod holes (35), a convex cylinder (37) is arranged on the connecting lower seat body (5), a cylinder cavity (38) is formed on the bottom surface of the convex cylinder (37), an opening (39) is formed on the top wall of the cylinder cavity (38) and is aligned with the through hole (36), a hollow cylinder cover (40) is arranged on the bottom surface of the convex cylinder (37), a lock rod column (41) is arranged at the center of the cylinder cavity (38), the upper end of the lock rod column (41) penetrates the opening (39) and the through hole (36) in sequence and is inserted into the lock rod hole (35) of the transmission rod (1), and the lower end of the lock rod column (41) penetrates the cylinder cover (40). The middle part of the lock rod column (41) is coaxially provided with a sliding disc (42) which is in sliding fit with the barrel cavity (38), a top disc spring (43) is sleeved on the lock rod column (41), the upper end of the top disc spring (43) is in abutment with the top wall of the barrel cavity (38), and the lower end of the top disc spring (43) is in abutment with the sliding disc (42), a hollow guide barrel (44) is coaxially arranged on the end face of the barrel cover (40) away from the convex barrel (37), a plurality of lock column guide holes (45) are formed in the outer side wall of the guide barrel (44), a hollow rotating shaft (49) is coaxially arranged on the end of the guide barrel (44) away from the barrel cover (40), the lower end of the lock rod column (41) sequentially passes through the hollow parts of the guide barrel (44) and the rotating shaft (49), a plurality of lock column clamping holes (46) capable of being aligned with the lock column guide holes (45) are formed in the cylindrical surface of the lock rod column (41), a plurality of sliding rails (47) are arranged on the end face of the barrel cover (40) away from the convex barrel (37), a lock column sliding block (48) capable of passing through the lock column guide hole (45) and being inserted into the lock column clamping hole (46) is slidably arranged on the sliding rail (47), a driving sliding rod (52) is arranged on the end face of the lock column sliding block (48) away from the barrel cover (40), a driving plate (50) is rotatably arranged on the rotating shaft (49), a plurality of arc-shaped driving holes (51) in sliding fit with the driving sliding rod (52) are formed in the thickness direction of the driving plate (50), and the distance from the inner end (511) of the driving hole (51) to the center of the driving plate (50) is less than the distance from the outer end (512) of the driving hole (51) to the center of the driving plate (50).

2. A brush cutter with a vibration-damping handle according to claim 1, characterized in that: The lower spring seat (8) comprises a lower nut (81) located at the center and a lower seat shell (83) wrapped outside the lower nut (81), a lower annular groove (82) is formed in the outer side wall of the lower nut (81) in the circumferential direction, a lower embedded ring (84) is arranged on the inner wall of the lower seat shell (83) and embedded with the lower annular groove (82), the lower seat shell (83) is made of rubber material, and a lower spring groove (85) is formed in the outer side wall of the lower seat shell (83).

3. A brush cutter with a vibration-damping handle according to claim 2, characterized in that: A lower through hole (10) penetrating through the connecting upper seat body (6) and the connecting lower seat body (5) is formed in the bottom surface of the connecting seat (4) and corresponds to the lower mounting groove (7), a lower screw (11) in threaded connection with the lower nut (81) is arranged in the lower through hole (10), a lower spring washer (12) is sleeved on the lower screw (11), and the lower spring washer (12) is located between the connecting seat (4) and the head of the lower screw (11).

4. A brush cutter with a vibration-damping handle according to claim 1, characterized in that: The upper spring seat (20) comprises a central upper nut (201) and an upper seat shell (203) wrapped outside the upper nut (201), an upper ring groove (202) is formed in the outer wall of the upper nut (201) in a circumferential direction, an upper embedded ring (204) is arranged on the inner wall of the upper seat shell (203) and embedded with the upper ring groove (202), the upper seat shell (203) is made of rubber, an upper spring groove (205) is formed in the outer wall of the upper seat shell (203), and the upper part of the damping spring (9) is sleeved on the upper seat shell (203) and embedded with the upper spring groove (205).

5. A brush cutter with a vibration-damping handle according to claim 4, characterized in that: An upper countersunk hole (21) is formed in the top surface of the handle seat (13) and penetrates the handle upper seat body (15) and the handle lower seat body (14), an upper screw (22) is arranged in the upper countersunk hole (21) and is in threaded connection with the upper nut (201), an upper spring washer (23) is sleeved on the upper screw (22), and the upper spring washer (23) is located between the head of the upper screw (22) and the handle seat (13).

6. A brush cutter with a vibration-damping handle according to claim 1, characterized in that: The top surface of the connecting upper seat body (6) is provided with a damping seat (24), a gradually expanding guide rod hole (25) and a middle oil cavity (26) are sequentially formed in the center of the top surface of the damping seat (24) in a downward direction, a middle piston plate (27) is slidably arranged in the middle oil cavity (26), a plurality of side oil cavities (28) are formed in the top surface of the damping seat (24) and are uniformly distributed outside the middle oil cavity (26), a plurality of oil communication holes (29) are formed in the damping seat (24) and are used for connecting the middle oil cavity (26) and the side oil cavities (28), side piston plates (30) are slidably arranged in the side oil cavities (28), a hollow fixing plate (31) is arranged on the top surface of the damping seat (24), a return spring (32) is arranged between the fixing plate (31) and the side piston plate (30), and damping oil is filled in the middle oil cavity (26) and the side oil cavities (28).

7. A brush cutter with a vibration-damping handle according to claim 1, characterized in that: A plurality of positioning holes (17) are formed in the outer wall of the operating handle (16), and a plurality of positioning columns (18) are arranged on the top surface of the handle lower seat body (14) and are in plug connection with the positioning holes (17).

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