Backpack brush cutter convenient to assemble

Abstract

The backpack brush cutter convenient to assemble comprises a connecting inner pipe and a connecting outer pipe, a connecting ring groove is formed in the outer side of the connecting inner pipe, a plurality of elastic clamps are installed on the outer side of the connecting outer pipe in an annular array mode, the free ends of the elastic clamps penetrate into the connecting outer pipe in a sliding mode, and the connecting outer pipe is in threaded connection with a fixing ring. Connecting inner pipes are arranged at the two ends of the flexible shaft and the input end of the gearbox, a rack is fixedly installed on the outer side of the hard shaft, connecting outer pipes are arranged at the two ends of the hard shaft and the output end of the clutch, sleeves are installed on the lifting handle and the protective cover, and locating pins are in threaded connection with the side walls of the sleeves in the radial direction. According to the brush cutter, through the arrangement of the insertion connection structures of the connecting inner pipe, the connecting outer pipe, the sleeve and the rack part, an operator can complete disassembly and assembly without a tool, and disassembly and assembly of all parts of the brush cutter before and after use are facilitated.

Description

Technical Field

[0001] The utility model belongs to the technical field of brush cutters and relates to a backpack brush cutter which is easy to assemble. Background Art

[0002] A brush cutter is a device used for pruning and cutting plants in landscaping or crop planting. A backpack brush cutter usually consists of a gasoline engine and fuel tank, a clutch, a flexible shaft, a rigid shaft, a handle, an operating lever, and a blade. A shoulder strap is provided inside the gasoline engine and fuel tank. When in use, the brush cutter is carried on the back, and the handle and operating lever are held to cut.

[0003] The various parts of the backpack brush cutter need to be disassembled and assembled before and after use. Usually, the various parts are connected by plugging and bolting. Since there are many parts, the installation is troublesome. Utility Model Content

[0004] In view of the above problems, the utility model provides a backpack brush cutter which is easy to assemble and well solves the problems in the prior art.

[0005] In order to achieve the above purpose, the technical solution adopted by the utility model is as follows:

[0006] A backpack brush cutter that is easy to assemble, comprising:

[0007] The main engine part includes a fuel tank and a gasoline engine, and the output end of the gasoline engine is connected to a clutch.

[0008] A connecting inner tube, wherein a connecting ring groove is provided on the outer side of the connecting inner tube;

[0009] A connecting outer tube, wherein a plurality of elastic clips are installed in an annular array on the outer side of the connecting outer tube, wherein the free ends of the elastic clips penetrate and can slide into the interior of the connecting outer tube, wherein the connecting outer tube is threadedly connected to a fixing ring, and during installation, the connecting inner tube can be slidably inserted into the connecting outer tube, wherein the free ends of the elastic clips are inserted into the connecting ring groove, and the fixing ring is located outside the free ends of the elastic clips after rotation;

[0010] A flexible shaft and a gear box, both ends of the flexible shaft and the input end of the gear box are provided with the connecting inner tube;

[0011] A hard shaft, a rack is fixedly mounted on the outside of the hard shaft, and both ends of the hard shaft and the clutch output end are provided with connecting outer tubes;

[0012] A sleeve, wherein a positioning pin is threadedly connected to the side wall of the sleeve along a radial direction. When installing, the sleeve is sleeved on the outside of the hard shaft, and the positioning pin is tightened and abuts against the rack;

[0013] A handle and a protective cover, both the handle and the protective cover are equipped with the sleeve.

[0014] Optionally, at least one positioning protrusion is fixedly connected to the outer side of the connecting inner tube, and a positioning groove is provided on the end surface of one end of the connecting outer tube inserted into the connecting inner tube. During installation, the positioning protrusion is inserted into the positioning groove.

[0015] Optionally, the positioning pin is in the shape of a butterfly bolt.

[0016] Optionally, the connecting outer tube and the elastic card are provided with accommodating grooves in a one-to-one correspondence, and the elastic card is located in the accommodating grooves.

[0017] Optionally, it also includes,

[0018] A positioning plate, the positioning plate is fixedly mounted on the output shaft of the gear box, and a plurality of positioning grooves are arranged in a circumferential array on the outer side of the positioning plate;

[0019] A positioning button, the positioning button is slidably mounted on the gear box, one end of the positioning button passes through the gear box to the outside of the positioning plate, and a return spring is arranged between the positioning button and the gear box;

[0020] A fixing nut, the fixing nut being threadedly connected to the output shaft of the gear box, and the fixing nut being a left-hand thread;

[0021] A limiting pin, the limiting pin is slidably mounted on the gearbox output shaft in a radial direction, an ejection spring is arranged between the limiting pin and the gearbox output shaft, and the limiting pin does not protrude from the outer side wall of the gearbox output shaft after compressing the ejection spring;

[0022] The blade is located between the positioning plate and the fixing nut during installation. After the fixing nut is tightened, the limiting pin is located at the end of the fixing nut away from the blade.

[0023] Optionally, the limiting pin is in the shape of an elongated strip.

[0024] Compared with the prior art, the utility model has the following beneficial effects:

[0025] 1. Through the plug-in connection structure between the inner tube and the outer tube and the sleeve and the rack part, the operator can complete the disassembly and assembly without the help of tools, which is convenient for disassembly and assembly of various parts of the brush cutter before and after use;

[0026] 2. By setting a fixing nut and a limiting pin, it is convenient to fix the blade on the gear box. By setting a limiting pin, the force when tightening the fixing nut is reduced, so that the fixing nut can be manually fixed by passing it. The limiting pin now prevents the axial movement of the fixing nut when it rotates. By setting a positioning button and a positioning groove, it is convenient to fix the position of the positioning plate through the positioning button when the fixing nut rotates. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the utility model;

[0028] Figure 2 This is a schematic structural diagram of the inner pipe connection portion of an embodiment of the utility model;

[0029] Figure 3 It is a structural schematic diagram of the sleeve part of an embodiment of the utility model;

[0030] Figure 4 It is a structural schematic diagram of the positioning plate part of an embodiment of the utility model.

[0031] Reference numerals: 1, main unit; 11, clutch; 12, flexible shaft; 13, gear box; 14, hard shaft; 15, handle; 16, guard; 17, blade;

[0032] 21, connecting inner tube; 211, connecting ring groove; 212, positioning protrusion; 22, connecting outer tube; 221, elastic card; 222, fixing ring; 223, positioning groove; 224, containing groove;

[0033] 31. rack; 32. sleeve; 321. positioning pin;

[0034] 41. Positioning plate; 411. Positioning slot; 42. Positioning button; 43. Fixing nut; 44. Limiting pin. DETAILED DESCRIPTION

[0035] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0036] See also Figure 1-Figure 3The utility model discloses a backpack brush cutter that is easy to assemble, including a main unit 1, the main unit 1 includes a fuel tank and a gasoline engine, the gasoline engine output end is connected to a clutch 11, the clutch 11 is sequentially connected to a flexible shaft 12, a hard shaft 14, and a gear box 13, the hard shaft 14 is equipped with a handle 15 and a shield 16, and also includes a connecting inner tube 21 and a connecting outer tube 22, the outer side of the connecting inner tube 21 is provided with a connecting ring groove 211, and the outer side of the connecting outer tube 22 is provided with a plurality of elastic clips 221 in an annular array, the free end of the elastic clip 221 can slide through the inside of the connecting outer tube 22, and the connecting outer tube 22 is threadedly connected to a fixing ring 222, During installation, the connecting inner tube 21 can be slidably inserted into the connecting outer tube 22, the free end of the elastic card 221 is inserted into the connecting ring groove 211, and the fixing ring 222 is rotated and located outside the free end of the elastic card 221, both ends of the flexible shaft 12 and the input end of the gear box 13 are provided with connecting inner tubes 21, the outer side of the hard shaft 14 is fixedly installed with a rack 31, both ends of the hard shaft 14 and the output end of the clutch 11 are provided with connecting outer tubes 22, the handle 15 and the shield 16 are both installed with a sleeve 32, and the side wall of the sleeve 32 is radially threaded with a positioning pin 321. During installation, the sleeve 32 is sleeved on the outer side of the hard shaft 14, and the positioning pin 321 is tightened and abuts against the rack 31.

[0037] Specifically, a connecting inner tube 21 and a connecting outer tube 22 are provided at the connecting ends of the soft shaft 12, the hard shaft 14, etc., so that the connecting inner tube 21 is installed in the connecting outer tube 22 by plugging and fixed by a fixing ring 222. The handle 15 and the shield 16 are partially plugged and installed through the sleeve 32 and the rack 31, and the position is fixed by the positioning pin 321.

[0038] In this way, by means of the plug-in connection structure between the inner tube 21 and the outer tube 22 and between the sleeve 32 and the rack 31, the operator can complete the disassembly and assembly without the aid of tools, making it convenient to disassemble and assemble the various parts of the brush cutter before and after use.

[0039] In some feasible embodiments, the main body 1 and the flexible shaft 12, the hard shaft 14, the gear box 13, the hard shaft 14, the handle 15 and the shield 16 are all prior art and will not be described in detail here.

[0040] See also Figure 2 The connecting inner tube 21 and the connecting outer tube 22 are in the shape of circular tubes, the connecting annular groove 211 is a triangular annular groove, the outer diameter of the connecting inner tube 21 is the same as the inner diameter of the connecting outer tube 22, so that the connecting inner tube 21 can be inserted into the connecting outer tube 22, the elastic card 221 is an elastic rectangular sheet fixed at one end to the connecting outer tube 22, and the end of the elastic card 221 that is clamped to the connecting annular groove 211 is provided with a triangular protrusion adapted to the connecting annular groove 211, and the fixing ring 222 can be set as a threaded section and a light tube section. After the elastic card 221 is clamped into the connecting annular groove 211, the light tube section is set on the outer side of the connecting annular groove 211 by rotation, and the elastic card 221 is restricted to complete the fixation;

[0041] See also Figure 3 The rack 31 is fixedly mounted on the outside of the hard shaft 14, and the inner side of the sleeve 32 is a special-shaped hole adapted to slide on the rack 31 and the hard shaft 14. The positioning pin 321 is rotated and inserted into the rack 31 to complete the position fixing. In order to facilitate the manual rotation of the positioning pin 321, the positioning pin 321 is in the shape of a butterfly bolt. By setting the rack 31 and the sleeve 32, it is convenient to install the handle 15 and the shield 16, and it is also convenient to adjust the position according to the user's usage habits;

[0042] It should be understood that after using the connection between the inner tube 21 and the outer tube 22 and the sleeve 32 and the rack 31, the threaded connection between the fixing ring 222 and the positioning pin 321 does not need to be fixed by tightening, that is, no tools are required, which facilitates the disassembly and assembly of various parts of the brush cutter before and after use.

[0043] As a specific embodiment of the backpack brush cutter that is easy to assemble provided by the application, please refer to Figure 2 At least one positioning protrusion 212 is fixedly connected to the outer side of the connecting inner tube 21, and a positioning groove 223 is provided on the end surface of the connecting outer tube 22 inserted into the connecting inner tube 21. During installation, the positioning protrusion 212 is inserted into the positioning groove 223.

[0044] In general, a rotating shaft is provided inside the flexible shaft 12 and the rigid shaft 14. By providing the positioning protrusion 212 and the positioning groove 223, the connecting inner tube 21 and the connecting outer tube 22 are circumferentially fixed, thereby reducing the possibility of the flexible shaft 12 and the rigid shaft 14 rotating with the outside.

[0045] As a specific embodiment of a backpack brush cutter that is easy to assemble provided in the application, a receiving groove 224 is formed in a one-to-one correspondence between the connecting outer tube 22 and the elastic card 221 , and the elastic card 221 is located in the receiving groove 224 .

[0046] It should be understood that the elastic card 221 is disposed in the receiving groove 224 to facilitate the fixing ring 222 to rotate to the outside of the elastic card 221 to fix the elastic card 221 .

[0047] In some feasible embodiments, the connecting outer tube 22 is provided with threads at the position of the receiving groove 224 , so that the fixing ring 222 can be rotated to the position of the elastic clip 221 through the threads.

[0048] As another specific embodiment of the backpack brush cutter that is easy to assemble provided by the application, please refer to Figure 4, and also includes a positioning disk 41, which is fixedly installed on the output shaft. A plurality of positioning grooves 411 are arranged in a circumferential array on the outer side of the positioning disk 41. A positioning button 42 is slidably installed on the outer side of the gear box 13. One end of the positioning button 42 passes through the gear box 13 to the outer side of the positioning disk 41. A reset spring is arranged between the positioning button 42 and the gear box 13. A fixing nut 43 is threadedly connected to the output shaft of the gear box 13. The fixing nut 43 is a left-handed thread. A limiting pin 44 is slidably installed on the output shaft of the gear box 13 in the radial direction. An ejection spring is arranged between the limiting pin 44 and the output shaft of the gear box 13. After the ejection spring is compressed, the limiting pin 44 does not protrude from the outer side wall of the output shaft of the gear box 13. A blade 17 is installed between the positioning disk 41 and the fixing nut 43. After the fixing nut 43 is tightened, the limiting pin 44 is located at the end of the fixing nut 43 away from the blade 17.

[0049] In combination with specific usage scenarios, by setting a fixing nut 43 and a limiting pin 44, it is convenient to fix the blade 17 on the gear box 13. By setting the limiting pin 44, the force when tightening the fixing nut 43 is reduced, so that the fixing nut 43 can be manually fixed. The limiting pin 44 now prevents the axial movement of the fixing nut 43 during rotation. By setting a positioning button 42 and a positioning groove 411, it is convenient to fix the position of the positioning plate 41 through the positioning button 42 when the fixing nut 43 rotates.

[0050] In some feasible embodiments, the positioning disk 41, the blade 17 and the output shaft key of the gear box 13 are connected. The positioning disk 41 is disc-shaped. The gear box 13 is fixedly connected with an annular cover. The positioning disk 41 is located inside the annular cover. The positioning button 42 is installed on the outside of the annular cover. The positioning button 42 includes a rectangular base. A rectangular block is slidably installed on the rectangular base. A reset spring is arranged between the rectangular block and the rectangular base. A cylindrical pin is fixedly installed on the rectangular base. When the positioning button 42 is pressed, the cylindrical pin is inserted into the positioning groove 411. An ejection spring is fixedly installed at the bottom of the limiting pin 44. A through hole is radially opened on the output shaft of the gear box 13. The ejection spring and the limiting pin 44 are installed in the through hole. The ejection spring is fixedly connected to the through hole at one end away from the limiting pin 44.

[0051] In order to facilitate pressing the limiting pin 44 during disassembly, the limiting pin 44 is in a long strip shape.

[0052] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A backpack brush cutter that is easy to assemble, characterized in that: include: The main engine part includes a fuel tank and a gasoline engine, and the output end of the gasoline engine is connected to a clutch. A connecting inner tube, wherein a connecting ring groove is provided on the outer side of the connecting inner tube; A connecting outer tube, wherein a plurality of elastic clips are installed in an annular array on the outer side of the connecting outer tube, wherein the free ends of the elastic clips penetrate and can slide into the interior of the connecting outer tube, wherein the connecting outer tube is threadedly connected to a fixing ring, and during installation, the connecting inner tube can be slidably inserted into the connecting outer tube, wherein the free ends of the elastic clips are inserted into the connecting ring groove, and the fixing ring is located outside the free ends of the elastic clips after rotation; A flexible shaft and a gear box, both ends of the flexible shaft and the input end of the gear box are provided with the connecting inner tube; A hard shaft, a rack is fixedly mounted on the outside of the hard shaft, and both ends of the hard shaft and the clutch output end are provided with connecting outer tubes; A sleeve, wherein a positioning pin is threadedly connected to the side wall of the sleeve along a radial direction. When installing, the sleeve is sleeved on the outside of the hard shaft, and the positioning pin is tightened and abuts against the rack; A handle and a protective cover, both the handle and the protective cover are equipped with the sleeve.

2. The easy-to-assemble backpack brush cutter according to claim 1, characterized in that: At least one positioning protrusion is fixedly connected to the outer side of the connecting inner tube, and a positioning groove is provided on the end surface of one end of the connecting outer tube inserted into the connecting inner tube. During installation, the positioning protrusion is inserted into the positioning groove.

3. The easy-to-assemble backpack brush cutter according to claim 1, characterized in that: The positioning pin is in the shape of a butterfly bolt.

4. The easy-to-assemble backpack brush cutter according to claim 1, characterized in that: The connecting outer tube and the elastic card are provided with accommodating grooves in a one-to-one correspondence, and the elastic card is located in the accommodating grooves.

5. The easy-to-assemble backpack brush cutter according to claim 1, characterized in that: Also includes, A positioning plate, the positioning plate is fixedly mounted on the output shaft of the gear box, and a plurality of positioning grooves are arranged in a circumferential array on the outer side of the positioning plate; A positioning button, the positioning button is slidably mounted on the gear box, one end of the positioning button passes through the gear box to the outside of the positioning plate, and a return spring is arranged between the positioning button and the gear box; A fixing nut, the fixing nut being threadedly connected to the output shaft of the gear box, and the fixing nut being a left-hand thread; A limiting pin, the limiting pin is slidably mounted on the gearbox output shaft in a radial direction, an ejection spring is arranged between the limiting pin and the gearbox output shaft, and the limiting pin does not protrude from the outer side wall of the gearbox output shaft after compressing the ejection spring; The blade is located between the positioning plate and the fixing nut during installation. After the fixing nut is tightened, the limiting pin is located at the end of the fixing nut away from the blade.

6. The easy-to-assemble backpack brush cutter according to claim 5, characterized in that: The limiting pin is in the shape of an elongated strip.

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