Garden tool

Abstract

The garden tool comprises a gear box, an oil tank and a working assembly, and the working assembly is installed at the output end of the gear box; an oil pump is installed on one side of the oil tank, one end of the oil pump is connected with an oil pump driving part, and the oil pump driving part is preferably a turbine. A gear set and an oil slinger plate are arranged in the gear box, the gear set comprises an output shaft, the oil slinger plate is arranged on the output shaft, the gear set provides source power for the oil pump through the oil pump driving part, and the oil pump can pump lubricating oil in the oil tank out and output the lubricating oil to the working assembly; the oil slinging plate is provided with the tilting part, and when the output shaft drives the oil slinging plate to rotate, the tilting part can throw lubricating grease in the gearbox to the surfaces of the gear set and the oil pump driving piece, so that the lubricating grease can make full contact with the gear set and the oil pump driving piece, and the problem that the lubricating grease is deposited at the bottom in the gearbox can also be solved.

Description

Technical Field

[0001] This application relates to the field of mechanical structures, and in particular to a garden tool. Background Technology

[0002] In garden tools such as tree branches cutters and lawn mowers, the gear meshing lubrication in the gearbox is passive. After grease is added, it only relies on its own viscosity to adhere to the gears. When the gears mesh and operate, the grease adhering to the gear surface is squeezed out and thrown into the gearbox cavity. After a period of gear meshing and operation, the temperature of the gears and gearbox body rises, the viscosity of the internal grease gradually decreases, and the grease state changes from semi-solid to semi-liquid. It slowly deposits at the bottom of the gearbox cavity. The gear surface begins to lack grease lubrication, which further leads to an increase in the temperature of gear meshing and operation, and increased wear. Excessively high meshing operating temperature will cause a decrease in the mechanical properties of the gear material, a decrease in bearing clearance, and an increase in friction. Continued operation may lead to problems such as bearing damage, rapid gear wear or breakage, which seriously affects the service life of the product. Utility Model Content

[0003] The purpose of at least one specific embodiment of this utility model is to overcome the defects of the existing technology and provide a garden tool.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows:

[0005] A garden tool includes a gearbox, an oil tank, and a working assembly, wherein the working assembly is mounted on the output end of the gearbox;

[0006] An oil pump is installed on one side of the oil tank, and one end of the oil pump is connected to an oil pump drive unit;

[0007] The gearbox is equipped with a gear set and an oil slinger. The gear set includes an output shaft, and the oil slinger is located on the output shaft. The gear set provides power to the oil pump through the oil pump drive, and the oil pump can pump the lubricating oil in the oil tank to the working assembly.

[0008] The oil slinger has a raised part. When the output shaft drives the oil slinger to rotate, the raised part can throw the lubricating grease in the gearbox onto the surface of the gear set and the oil pump drive.

[0009] Furthermore, the raised part is located at the edge of the oil-slinging plate, with one end of the raised part away from the surface of the oil-slinging plate and the other end close to the surface of the oil-slinging plate.

[0010] Furthermore, the oil pump drive component is a turbine.

[0011] Furthermore, the gearbox includes a gearbox housing, and an inner cavity is formed inside the gearbox housing, in which the gear set is housed;

[0012] The gear set also includes a first bearing, a first gear, a second bearing, a second gear, a third bearing, and a sprocket. The second bearing, the second gear, the third bearing, and the sprocket are mounted on the output shaft. The first bearing is supported on one side of the first gear, and the second bearing is supported on one side of the second gear. The first gear meshes with the second gear, and the sprocket connects to the working assembly.

[0013] Furthermore, a worm gear is provided on the output shaft, which meshes with a worm wheel, and an oil slinger is located below the turbine and above the third bearing.

[0014] Furthermore, there are multiple raised parts, which are arranged in a circumferential array on the oil slinger plate, and the array direction of the raised parts is the same as the rotation direction of the output shaft.

[0015] Furthermore, the gearbox housing is provided with a filler port, which is located at a height higher than the oil slinger. A sealing element is provided at the filler port, which is suitable for adding lubricating grease into the inner cavity of the gearbox housing.

[0016] Furthermore, the gearbox is equipped with a mounting base, and the oil tank is located on the mounting base. The oil tank includes an oil tank housing, and an oil tank cover is provided on the oil tank housing. Lubricating oil can be added into the oil tank housing through the oil tank cover. An oil outlet is provided at the bottom of the oil tank housing, and the oil outlet is connected to the working assembly.

[0017] Furthermore, the work assembly includes a guide plate, a chain mounted on the guide plate, and blades on the chain. The chain meshes with and is driven by a sprocket.

[0018] Furthermore, both the first gear and the second gear are bevel gears. The first gear has an internal spline hole. The first gear can be connected to an external power source through a rigid shaft. A plug is provided in the internal spline hole, and the plug has a hole. The hole can guide the lubricating grease in the gearbox housing into the internal spline hole, providing lubrication for the connection between the rigid shaft and the internal spline hole.

[0019] The advantages of the garden tool provided in this application compared with the prior art are as follows: the gearbox of the garden tool is equipped with a gear set and an oil slinger. The gear set includes an output shaft, and the oil slinger is located on the output shaft. The oil slinger has a raised part. When the output shaft drives the oil slinger to rotate, the raised part can throw the lubricating grease in the gearbox to the surface of the gear set and the oil pump drive, so that the lubricating grease can fully contact the gear set and the oil pump drive, and can also avoid the problem of lubricating grease depositing at the bottom inside the gearbox. Attached Figure Description

[0020] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of a garden tool in one embodiment of this application.

[0022] Figure 2 This is a partial exploded view of garden tools in one embodiment of this application.

[0023] Figure 3 This is a side view of a garden tool in one embodiment of this application.

[0024] Figure 4 for Figure 3 A schematic diagram of the cross section along line AA.

[0025] Figure 5 for Figure 4 A partial structural diagram.

[0026] Figure 6 This is a schematic diagram of the internal structure of a garden tool in one embodiment of this application.

[0027] Figure 7 This is a schematic diagram of the structure of an oil-slinging board for garden tools in one embodiment of this application.

[0028] Figure 8 This is a schematic diagram of the assembly of the mounting base for garden tools in one embodiment of this application.

[0029] Figure 9 This is a schematic diagram of the structure of the first gear of a garden tool in one embodiment of this application. Detailed Implementation

[0030] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0031] Reference Figures 1 to 5 A garden tool 100 includes a gearbox 10, an oil tank 20, and a working assembly 30, wherein the working assembly 30 is installed at the output end of the gearbox 10;

[0032] An oil pump 201 is installed on one side of the oil tank 20, and one end of the oil pump 201 is connected to an oil pump drive 202. In this embodiment, the oil pump drive 202 is preferably a turbine.

[0033] The gearbox 10 is equipped with a gear set and an oil slinger 101. The gear set includes an output shaft 102 and the oil slinger 101 is mounted on the output shaft 102. The gear set provides power to the oil pump 201 through the oil pump drive 202. The oil pump 201 can pump the lubricating oil in the oil tank 20 to the working assembly 30.

[0034] Reference Figure 7 The oil slinger 101 is provided with a raised part 101a. When the output shaft 102 drives the oil slinger 101 to rotate, the raised part 101a can throw the lubricating grease in the gearbox 10 onto the surface of the gear set and the oil pump drive 202.

[0035] Furthermore, the raised portion 101a is located at the edge of the oil slinger 101. One end of the raised portion 101a is far from the surface of the oil slinger 101, and the other end is close to the surface of the oil slinger 101. This design utilizes the principle of centrifugal force. When the oil slinger 101 rotates, the end close to the surface of the oil slinger 101 serves as a fulcrum, while the end far from the surface is more likely to lift and throw the lubricating grease under the action of centrifugal force. Moreover, the raised portion 101a is located at the edge of the oil slinger 101, making full use of the centrifugal force generated by the rotation of the oil slinger 101, so that the lubricating grease can be thrown to the gear set and oil pump drive 202 at a greater distance, improving the oil throwing effect, while not affecting the overall structural stability of the oil slinger 101.

[0036] There are multiple raised parts 101a, which are arranged in a circumferential array on the oil slinger 101. Moreover, the array direction of the raised parts 101a is the same as the rotation direction of the output shaft 102. When the output shaft 102 drives the oil slinger 101 to rotate, the multiple raised parts 101a evenly spray lubricating grease onto various parts of the gear set and oil pump drive components from different positions. Compared with a single raised part, the circumferential array arrangement can cover all directions, avoid lubrication dead spots, ensure that each component can obtain good lubrication, and improve the operational reliability of the entire system.

[0037] Furthermore, the gearbox 10 includes a gearbox housing 103, and an inner cavity 104 is formed inside the gearbox housing 103, in which the gear set is housed;

[0038] Reference Figure 6The gear set also includes a first bearing 105, a first gear 106, a second bearing 107, a second gear 108, a third bearing 109, and a sprocket 110. The second bearing 107, the second gear 108, the third bearing 109, and the sprocket 110 are mounted on the output shaft 102. The first bearing 105 is supported on one side of the first gear 106, and the second bearing 107 is supported on one side of the second gear 108. The first gear 106 meshes with the second gear 108, and the sprocket 110 is connected to the working assembly 30.

[0039] In addition, a worm gear 111 is provided on the output shaft 102, which meshes with the worm wheel (oil pump drive 202). The oil slinger 101 is located below the turbine and above the third bearing 109. During the rotation of the oil slinger 101, the lubricating grease inside the gearbox 10 is evenly sprayed to various parts such as the gear set and the oil pump drive. This can reduce or even avoid direct contact between the lubricating grease and the third bearing 109 below the oil slinger 101, thereby avoiding the problem of oil leakage in the gap of the third bearing 109.

[0040] Furthermore, the gearbox housing 103 is provided with a filler port 112, the height of which is higher than that of the oil slinger 101, and a sealing member 113 is provided at the filler port 112. The filler port 112 is suitable for adding lubricating grease into the inner cavity of the gearbox housing 103.

[0041] Specifically, in some embodiments, the sealing element 113 is an oil port screw. When adding lubricating grease into the gearbox housing 103, the oil port screw can be removed to add lubricating grease through the oil port 112.

[0042] In this embodiment, the oil tank 20 is a nylon welded oil tank, which is manufactured by vibration friction welding of nylon material. Existing technologies mostly use PE blow-molded oil tanks. The nylon material of the oil tank in this application can form a welded joint with a strength higher than that of the base material at the joint. This joint has better durability, reduces the risk of leakage, and the nylon material is lighter, which meets the requirements of lightweighting.

[0043] In addition, the first bearing 105, the second bearing 107 and the third bearing 109 are installed using a heat-fitting process, which can prevent damage to the gear surface during press fitting.

[0044] Furthermore, refer to Figure 8 The gearbox 10 is provided with a mounting base 40, and the oil tank 20 is provided on the mounting base 40. The oil tank 20 includes an oil tank housing 203, and an oil tank cover 204 is provided on the oil tank housing 203. After opening the oil tank cover 204, lubricating oil can be added into the oil tank housing 203 through the oil tank cover 204. An oil outlet 205 is provided at the bottom of the oil tank housing 203, and the oil outlet 205 is connected to the working assembly 30.

[0045] Furthermore, the working assembly 30 includes a guide plate 301, a chain 302 mounted on the guide plate 301, and a blade 303 disposed on the chain 302. The chain 302 meshes with the sprocket 110 and is driven by the sprocket 110.

[0046] In this embodiment, refer to Figure 9 Both the first gear 106 and the second gear 108 are bevel gears. The first gear 106 is provided with an internal spline hole 114. The first gear 106 can be connected to an external power source through a rigid shaft. A plug 115 is provided in the internal spline hole 114. The plug 115 is provided with a hole 116. The hole 116 can guide the lubricating grease in the gearbox housing 103 into the internal spline hole 114 to provide lubrication for the connection between the rigid shaft and the internal spline hole 114.

[0047] In some embodiments, the garden tool 100 also includes a detachable branch hook 50, which is located below the mounting base 40. The working surface of the branch hook 50 is a toothed surface, which facilitates positioning on the wood during cutting, thereby ensuring accurate cutting position, effectively reducing cutting errors caused by positioning deviation, and improving the quality and efficiency of garden operations.

[0048] The following section provides a detailed explanation of this application in light of its specific working principles.

[0049] The first gear 106 is connected to a power source. Driven by the power source, the first gear 106 drives the second gear 108, the output shaft 102, and the sprocket 110 to rotate synchronously. At the same time, the output shaft 102 drives the oil slinger 101 to rotate at high speed. The lubricating grease entering through the oil inlet 112 and the grease that falls onto the oil slinger 101 due to the heat generated during the operation of the gear set are thrown onto the surfaces of the gear set and the worm gear by the raised part 101a on the oil slinger 101, achieving the effect of active lubrication. It also prevents the grease that has turned into liquid after heating from leaking out from the gap of the third bearing 109. The rotation of the gear set also drives the worm gear to rotate. The worm gear is connected to the oil pump 201 in the oil tank. The rotation of the oil pump 201 delivers the lubricating oil in the oil tank 20 along the oil outlet 205 and the oil pipe to the working assembly 30, providing lubrication for the smooth operation of the working assembly 30.

[0050] It should be noted that the lubrication methods of gearbox 10 and working assembly 30 are different. The lubricating oil in oil tank 20 is mainly powered by output shaft 102 and then pumped out by oil pump 201 to lubricate working assembly 30. The lubricating grease injected into the filler port 112 on gearbox 10 is generally directly filled into the inner cavity 104 of gearbox housing 103 to lubricate gear set and worm gear. During the rotation of gear set inside gearbox housing 103, lubricating grease is thrown to the surface of various components of gear set and worm gear by the raised part 101a on oil slinger 101, achieving active lubrication. The lubricating grease can fully contact the gear set and oil pump drive components, and can also avoid the problem of lubricating grease depositing at the bottom inside the gearbox.

[0051] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model, and are not intended to limit it. Although this utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some or all of the technical features therein. Such modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this utility model.

Claims

1. A garden tool, comprising a gearbox, an oil tank, and a working assembly, wherein, The working assembly is installed at the output end of the gearbox; The feature is that an oil pump is installed on one side of the oil tank, and an oil pump drive unit is connected to one end of the oil pump; The gearbox is equipped with a gear set and an oil slinger. The gear set includes an output shaft, and the oil slinger is mounted on the output shaft. The gear set provides power to the oil pump through the oil pump drive, and the oil pump pumps the lubricating oil in the oil tank to the working assembly. The oil slinger has a raised portion, and the output shaft drives the oil slinger to rotate. The raised portion throws the lubricating grease in the gearbox onto the surface of the gear set and the oil pump drive.

2. The garden tool according to claim 1, characterized in that, The raised portion is located at the edge of the oil-slinging plate, with one end of the raised portion away from the surface of the oil-slinging plate and the other end close to the surface of the oil-slinging plate.

3. The garden tool according to claim 1, characterized in that, The oil pump drive component is a turbine.

4. The garden tool according to claim 3, characterized in that, The gearbox includes a gearbox housing, an inner cavity is formed inside the gearbox housing, and the gear set is housed in the inner cavity; The gear set further includes a first bearing, a first gear, a second bearing, a second gear, a third bearing, and a sprocket. The second bearing, the second gear, the third bearing, and the sprocket are mounted on the output shaft. The first bearing is supported on one side of the first gear, and the second bearing is supported on one side of the second gear. The first gear meshes with the second gear, and the sprocket connects to the working assembly.

5. The garden tool according to claim 4, characterized in that, The output shaft is provided with a worm gear, which meshes with the worm wheel. The oil slinger is located below the turbine and above the third bearing.

6. The garden tool according to claim 1, characterized in that, The number of the raised parts is multiple, and the multiple raised parts are arranged in a circumferential array on the oil slinger plate. The array direction of the raised parts is the same as the rotation direction of the output shaft.

7. The garden tool according to claim 4, characterized in that, The gearbox housing is provided with a filler port, which is located at a height higher than the oil slinger. A sealing element is provided at the filler port, which is suitable for adding lubricating grease into the inner cavity of the gearbox housing.

8. The garden tool according to claim 4, characterized in that, The gearbox is provided with a mounting base, and the oil tank is provided on the mounting base. The oil tank includes an oil tank shell and an oil tank cover. Lubricating oil can be added into the oil tank shell through the oil tank cover. An oil outlet is provided at the bottom of the oil tank shell, and the oil outlet is connected to the working assembly.

9. The garden tool according to claim 8, characterized in that, The working assembly includes a guide plate, a chain mounted on the guide plate, and blades disposed on the chain. The chain meshes with and is driven by the sprocket.

10. The garden tool according to claim 4, characterized in that, Both the first gear and the second gear are bevel gears. The first gear has an internal spline hole. The first gear can be connected to an external power source via a rigid shaft. A plug is provided in the internal spline hole. The plug has a hole that allows lubricating grease from the gearbox housing to be introduced into the internal spline hole, providing lubrication for the connection between the rigid shaft and the internal spline hole.

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