Synchronous belt electric starting device of mower

Abstract

The utility model discloses a mowing machine synchronous belt electric starting device which comprises an installation shell and a motor fixed on the installation shell, a first cavity and a second cavity which are adjacent to each other are arranged on the installation shell, the motor is arranged in the first cavity, a motor shaft of the motor is connected with a driving gear, a driven gear and an external connection disc are rotationally installed in the second cavity, and the external connection disc is connected with the driven gear. The driven gear can drive the external connection disc to rotate, the external connection disc is connected with the installation shell and limits the driven gear to disengage, the driving gear and the driven gear are sleeved with a belt used for linkage, and the belt is located between the installation shell and the motor and located on the inner ring of the first cavity and the inner ring of the second cavity. Compared with the prior art, the electric starting device has the advantages that the electric starting device is integrally arranged, so that the electric starting device can be separated from an engine to be independently assembled, the weight of the assembled electric starting device is effectively reduced, manual carrying is facilitated, and the load of a conveying belt can be effectively reduced when the electric starting device is assembled.

Description

Technical Field

[0001] The utility model relates to the technical field of lawn mowers, in particular to an electric starting device for lawn mowers, and more particularly to an electric starting device for a lawn mower with a synchronous belt. Background Art

[0002] A lawn mower, also known as a weeding machine, a grass cutting machine, a lawn trimmer, etc., is a mechanical tool for trimming lawns, vegetation, etc. It mainly consists of a cutter head, an engine, walking wheels, a walking mechanism, blades, a handrail, a control part, etc. The cutter head is mounted on the walking wheels, the engine is mounted on the cutter head, and the blades are mounted on the output shaft of the engine. In the prior art, the engine is usually started by an electric starting device.

[0003] The electric starting device on some lawn mowers, such as the patent with the authorization announcement number CN211950719U, provides an electric starting device for a gasoline lawn mower, including a housing and an engine. The engine is installed in the housing, and a starting device is also installed in the housing. The starting device includes a driving motor, a driving wheel and a turntable. A transmission gear is installed on the driving motor, a tooth part is provided on the driving wheel, and the transmission gear and the tooth part are connected by a chain. The turntable is rotatably installed on the driving wheel, and the driving motor drives the engine to work through the transmission gear, the chain, the driving wheel and the turntable in sequence.

[0004] In the disclosed patent, when the electric starting device is assembled on the assembly line, the engine needs to be pre-installed in the housing, and then components such as the driving motor, the transmission gear, the driving wheel, the turntable and the protective cover are installed on the housing.

[0005] Generally, the engine is heavy, and its weight accounts for about one-third or even half of the total weight of the lawn mower, resulting in a heavy housing with the engine. When components such as the driving motor, the transmission gear, the driving wheel, the turntable and the protective cover are assembled on the assembly line, the conveyor belt for conveying on the assembly line has a large load, and it is not convenient for manual handling due to the heavy weight after assembly. Summary of the Utility Model

[0006] Aiming at the problem that the existing electric starting device of a lawn mower is heavy due to the assembly after the engine is installed, the technical problem to be solved by the utility model is to provide an electric starting device for a lawn mower with a synchronous belt that is integrally arranged, can be assembled independently of the engine, and effectively reduces the weight.

[0007] The technical solution adopted by the utility model to solve the above technical problems is: an electric starting device for a lawn mower with a synchronous belt, including a mounting shell and a motor fixed on the mounting shell;

[0008] An adjacent chamber one and chamber two are provided on the mounting shell, and the motor is installed in chamber one;

[0009] The motor shaft of the motor is connected with a driving gear. A driven gear and an external disk are rotatably installed in the second chamber. The driven gear can drive the external disk to rotate. The external disk is connected to the installation shell and restricts the driven gear from disengaging.

[0010] A belt for linkage is sleeved on the driving gear and the driven gear. The belt is located between the installation shell and the motor and is within the inner circles of the first chamber and the second chamber.

[0011] A further preferred solution of the present utility model is that a fixing frame is fixedly installed on the installation shell above the first chamber, and a motor housing is fixed above the fixing frame on the motor.

[0012] A further preferred solution of the present utility model is that a transmission housing is fixed below the fixing frame, and a planetary gear is installed in the transmission housing. The motor shaft of the motor passes through the fixing frame and is inserted into the transmission housing, and the motor shaft is connected to the planetary gear.

[0013] A further preferred solution of the present utility model is that the planetary gear is connected with an output shaft extending out of the transmission housing. A spline shaft is installed on the output shaft, and the spline shaft is connected to the driving gear.

[0014] A further preferred solution of the present utility model is that a first bearing is installed in the first chamber, and the driving gear is rotatably connected to the first bearing.

[0015] A further preferred solution of the present utility model is that each of the driving gear and the driven gear is provided with a step, and a limiting piece is fixed on the driving gear or / and the driving gear. The belt meshing with the driving gear or the driven gear is located below the step or between the step and the limiting piece.

[0016] A further preferred solution of the present utility model is that a connecting column protrudes in the second chamber. A second bearing and the driven gear are sleeved on the connecting column, and the driven gear is rotatably connected to the second bearing.

[0017] A further preferred solution of the present utility model is that a screw is threadedly connected to the connecting column. The screw restricts the external disk from detaching from the installation shell, and the external disk restricts the driven gear from disengaging from the connecting column.

[0018] A further preferred solution of the present utility model is that a third bearing is sleeved on the screw, and the external disk is rotatably connected to the third bearing. The third bearing is located between the nut of the screw and the connecting column.

[0019] A further preferred solution of the present utility model is that a torsion spring is connected between the driven gear and the external disk. An installation groove for placing the torsion spring is provided on the driven gear, and a spacer is fixed on the driven gear. The spacer restricts the torsion spring from disengaging from the installation groove.

[0020] Compared with the prior art, the advantages of the present utility model are that by integrating the electric starting device, the electric starting device can be assembled independently from the engine, effectively reducing the weight of the assembled electric starting device, facilitating manual handling, and also effectively reducing the load on the conveyor belt during the assembly of the electric starting device. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present utility model will be further described in detail below in conjunction with the drawings and preferred embodiments. However, those skilled in the art will appreciate that these drawings are only drawn for the purpose of explaining the preferred embodiments and should not be construed as limiting the scope of the present utility model. In addition, unless otherwise specified, the drawings only schematically show the composition or structure of the described object and may include exaggerated displays, and the drawings are not necessarily drawn to scale.

[0022] Figure 1 is a schematic structural diagram of the electric starting device of the preferred embodiment of the present utility model;

[0023] Figure 2 is a sectional view of the electric starting device of the preferred embodiment of the present utility model;

[0024] Figure 3 is the preferred embodiment of the present utility model Figure 2 an enlarged schematic view of part A;

[0025] Figure 4 is the preferred embodiment of the present utility model Figure 2 an enlarged schematic view of part B;

[0026] Figure 5 is an exploded view of the electric starting device of the preferred embodiment of the present utility model;

[0027] Figure 6 is an exploded view of the motor and the transmission connection of the preferred embodiment of the present utility model.

[0028] In the figure: 1. Installation shell, 1a. Chamber one, 1b. Chamber two, 1c. Groove one, 1d. Groove two, 1e. Connecting column, 1f. Groove three; 2. Fixing frame; 3. Motor, 3a. Motor shaft, 3b. Motor housing; 4. Transmission shell, 4a. Limiting groove, 4b. Inner flanging one, 4c. Card slot; 5a. Ring gear, 5a1. Protrusion, 5a2. Inner flanging two, 5a3. Through hole, 5b. Sun gear one, 5c. Planet carrier one, 5d. Planet gear one, 5e. Sun gear two, 5f. Planet carrier two, 5g. Planet gear two, 5h. Card; 6. Output shaft; 7. Spline shaft; 8. Driving gear, 8a. Lower extension section one, 8b. Step one; 9. Driven gear, 9a. Lower extension section two, 9b. Installation groove, 9c. Upper extension section, 9d. Step two; 10. Belt; 11. External disk, 11a. Inner edge, 11b. Lower extension section three, 11c. Outer edge; 12. Bearing one; 13. Bearing two; 14. Bearing three; 15. Screw; 16. Torsion spring; 17. Spacer; 18. Limiting piece. Detailed implementation mode

[0029] The preferred embodiments of the present utility model will be described in detail below with reference to the accompanying drawings. Those skilled in the art will appreciate that these descriptions are only descriptive and exemplary and should not be construed as limiting the protection scope of the present utility model.

[0030] It should be noted that similar reference numerals represent similar items in the following drawings. Therefore, once an item is defined in one drawing, it may not be further defined and explained in subsequent drawings.

[0031] This embodiment mainly elaborates on a synchronous belt electric starting device for a lawn mower that can be integrally set up, assembled separately from the engine, and effectively reduce weight, as follows:

[0032] As Figures 1-6 shown, a synchronous belt 10 electric starting device for a lawn mower includes an installation shell 1 that can be used to fix on the engine housing, a fixing frame 2 fixed on the installation shell 1, a motor 3 fixed on the fixing frame 2, a transmission shell 4 fixed on the fixing frame 2, a planetary gear disposed in the transmission shell 4 and connected to the motor shaft 3a, an output shaft 6 connected to the planetary gear and extending out of the transmission shell 4, a spline shaft 7 installed on the output shaft 6, a driving gear 8 sleeved on the spline shaft 7, a driven gear 9 rotatably installed in the installation shell 1, a belt 10 connecting the driving gear 8 and the driven gear 9, and an external disk 11 rotatably connected to the installation shell 1 and restricting the driven gear 9 from disengaging from the installation shell 1.

[0033] In this embodiment, the installation shell 1 is provided with adjacent chamber one 1a and chamber two 1b. The fixing frame 2 is fixed above chamber one 1a by screws, and the motor 3 is fixed above chamber one 1a through the motor housing 3b. The transmission shell 4 is installed below the fixing frame 2. That is, the transmission shell 4, the planetary gear, the spline shaft 7 and the driving gear 8 are located in chamber one 1a, while the driven gear 9 and the external connection disk 11 are rotatably installed in chamber two 1b, and the belt 10 is located inside the inner circles of chamber one 1a and chamber two 1b.

[0034] To ensure the stability of the driving gear 8 rotating in the installation shell 1, a groove one 1c is recessed in chamber one 1a. The bearing one 12 is arranged in groove one 1c, and the driving gear 8 is provided with a downward extension section one 8a, and the downward extension section one 8a is connected to the bearing one 12.

[0035] In this application, by integrating the electric starting device, the electric starting device can be assembled independently away from the engine, effectively reducing the weight of the electric starting device after assembly, facilitating manual handling, and also effectively reducing the load on the conveyor belt when assembling the electric starting device.

[0036] As Figure 3 and Figure 6 shown, the planetary gear includes a ring gear 5a axially and limitedly installed in the transmission shell 4, a sun gear one 5b that can be installed on the motor shaft 3a, a planet carrier one 5c arranged in the ring gear 5a, a plurality of planet gears one 5d that mesh with the sun gear one 5b and the ring gear 5a and are rotatably installed on the planet carrier one 5c, a sun gear two 5e installed on the planet carrier one 5c, a planet carrier two 5f arranged in the ring gear 5a, and a plurality of planet gears two 5g that mesh with the sun gear two 5e and the ring gear 5a and are rotatably installed on the planet carrier two 5f. The output shaft 6 is connected to the planet carrier two 5f. Preferably, the motor shaft 3a can drive the sun gear one 5b to rotate, the planet carrier one 5c can drive the sun gear two 5e to rotate, and the planet carrier two 5f can drive the output shaft 6 to rotate.

[0037] To prevent the ring gear 5a from rotating in the transmission shell 4, a convex block 5a1 is provided on the outer wall of the ring gear 5a, and a limiting groove 4a that can be slidably inserted by the convex block 5a1 is provided on the inner wall of the transmission shell 4. When the convex block 5a1 is inserted into the limiting groove 4a, the relative rotation between the ring gear 5a and the transmission shell 4 is restricted.

[0038] At the same time, to prevent the ring gear 5a from falling out of the transmission shell 4, one end of the transmission shell 4 is provided with an inward flange one 4b, and the ring gear 5a abuts against the inward flange one 4b. The limiting groove 4a communicates with the other end of the transmission shell 4. An inward flange two 5a2 is provided on the end face of the ring gear 5a that abuts against the inward flange one 4b to prevent the planet carrier two 5f from detaching from one end of the transmission shell 4, and a through hole 5a3 is formed at the center of the inward flange two 5a2, and the output shaft 6 connected to the planet carrier two 5f passes through the through hole 5a3.

[0039] On the inner wall of the transmission housing 4 away from the first inward flange 4b, there is a clamping groove 4c, and a card 5h is clamped and installed at the clamping groove 4c. The driving end of the motor 3 can pass through the card 5h and be inserted into the gear ring 5a. When the transmission housing 4 is fixed on the fixing bracket 2, the fixing bracket 2 seals the other end of the transmission housing 4, restricting the card 5h and the gear ring 5a from falling out of the transmission housing 4, and the card 5h and the first inward flange 4b restrict the first planet gear 5d, the first planet carrier 5c, the second sun gear 5e, the second planet gear 5g and the second planet carrier 5f from falling out of the gear ring 5a.

[0040] As Figure 4 and Figure 5 shown, in the second chamber 1b, a second groove 1d is recessed, and a connecting post 1e protrudes from the bottom of the second groove 1d. A second bearing 13 is sleeved on the connecting post 1e and is located in the second groove 1d. And on the driven gear 9, there is a second downward extension 9a, and the second downward extension 9a is connected to the second bearing 13.

[0041] In this embodiment, on the driven gear 9, there is an upward-opening installation groove 9b. On the bottom of the installation groove 9b, there is a protruding upward extension 9c. And the second downward extension 9a is connected to the bottom of the bottom of the installation groove 9b. The bottom surface of the bottom of the installation groove 9b abuts against the upper end surface of the second bearing 13. The upward extension 9c, the bottom of the installation groove 9b and the second downward extension 9a are all sleeved on the connecting post 1e.

[0042] A screw 15 is threadedly connected to the connecting post 1e. A third bearing 14 is sleeved on the screw rod of the screw 15. A third groove 1f is recessed at the end of the connecting post 1e. The third bearing 14 is partially inserted into the third groove 1f. On the external connection disk 11, there is an inner edge 11a connecting to the outer ring of the third bearing 14. The nut of the screw 15 or a gasket sleeved on the screw rod of the screw 15 abuts against the upper end surface of the inner edge 11a. And on the external connection disk 11, there is a third downward extension 11b inserted into the installation groove 9b of the driven gear 9 and sleeved on the outer ring of the upper section. The third downward extension 11b is located on the outer ring of the upward extension 9c.

[0043] A coil spring 16 is installed in the installation groove 9b of the driven gear 9. The coil spring 16 is connected to the groove wall of the installation groove 9b and the outer wall of the third downward extension 11b. The driven gear 9 can drive the external connection disk 11 to rotate through the coil spring 16. To prevent the coil spring 16 from being forced out of the installation groove 9b, a spacer 17 is fixed on the driven gear 9 by screws. The spacer 17 partially covers the upward opening of the installation groove 9b. And on the external connection disk 11, there is an outer edge 11c. The outer edge 11c is located above the spacer 17. The spacer 17 and the outer edge 11c can restrict the coil spring 16 from falling out of the installation groove 9b.

[0044] As Figure 3 and Figure 5As shown, a first step 8b is provided on the driving gear 8. The outer diameter of the first step 8b is larger than the root diameter of the annular tooth portion of the driving gear 8, and the first step 8b is located at one axial end of the annular tooth portion of the driving gear 8. To prevent the belt 10 meshing with the driving gear 8 from falling off, a limiting piece 18 is fixedly installed on the driving gear 8. The size of the limiting piece 18 is also larger than the root diameter of the annular tooth portion of the driving gear 8. The partial belt 10 meshing with the driving gear 8 is located between the first step 8b and the limiting piece 18.

[0045] In this embodiment, a second step 9d is provided on the driven gear 9. The outer diameter of the second step 9d is larger than the root diameter of the annular tooth portion of the driven gear 9, and the second step 9d is located at one axial end of the annular tooth portion of the driven gear 9. The partial belt 10 meshing with the driven gear 9 is located between the second step 9d and the bottom of the chamber 1b of the second chamber.

[0046] Preferably, a limiting piece 18 can also be installed on the driven gear 9, so that the partial belt 10 meshing with the driven gear 9 is located between the second step 9d and the limiting piece 18.

[0047] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "upper", "lower", "front", "rear", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship in which the product of the present invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation to the present invention.

[0048] The above has introduced in detail a synchronous belt electric starting device for a lawn mower provided by the present invention. Specific examples are used in this article to elaborate on the principle and implementation manner of the present invention. The description of the above embodiments is only used to help understand the present invention and its core idea. It should be pointed out that for those of ordinary skill in the art in this technical field, without departing from the principle of the present invention, several improvements and modifications can be made to the present invention, and these improvements and modifications also fall within the protection scope of the claims of the present invention.

Claims

1. A synchronous belt electric starting device for a lawn mower, characterized in that: It includes a mounting shell, and a motor fixed on the mounting shell; The mounting shell is provided with adjacent chamber 1 and chamber 2, and the motor is installed in chamber 1; The motor shaft of the motor is connected with a driving gear, and the chamber 2 is rotatably mounted with a driven gear and an external disk, the driven gear can drive the external disk to rotate, the external disk is connected with the mounting shell, and limits the driven gear from being disengaged; The driving gear and the driven gear are sleeved with a belt for linkage, and the belt is located between the mounting shell and the motor, and is located at the inner circle of the first chamber and the second chamber.

2. A lawn mower synchronous belt electric starting device according to claim 1, characterized in that: A fixing frame located above chamber one is fixedly mounted on the mounting shell, and the motor is provided with a motor shell fixed above the fixing frame.

3. A lawn mower synchronous belt electric starting device according to claim 2, characterized in that: A transmission housing is fixed below the fixing frame, and planetary gears are installed in the transmission housing. The motor shaft of the motor passes through the fixing frame and is inserted into the transmission housing, and the motor shaft is connected to the planetary gears.

4. A lawn mower synchronous belt electric starting device according to claim 3, characterized in that: The planetary gear is connected with an output shaft extending from the transmission housing, a spline shaft is installed on the output shaft, and the spline shaft is connected to the driving gear.

5. A lawn mower synchronous belt electric starting device according to claim 1 or 3, characterized in that: A bearing one is installed in the chamber one, and the driving gear is rotationally connected to the bearing one.

6. A lawn mower synchronous belt electric starting device according to claim 1, characterized in that: The driving gear and the driven gear are each provided with a step, and a limiting plate is fixed on the driving gear or / and the driving gear, and the belt meshing with the driving gear or the driven gear is located below the step or between the step and the limiting plate.

7. A lawn mower synchronous belt electric starting device according to claim 1, characterized in that: A connecting column is protruding from the second chamber, and a second bearing and the driven gear are sleeved on the connecting column. The driven gear is rotatably connected to the second bearing.

8. A lawn mower synchronous belt electric starting device according to claim 7, characterized in that: The connecting column is threadedly connected with a screw, the screw restricts the external plate from falling off the mounting shell, and the external plate restricts the driven gear from leaving the connecting column.

9. A lawn mower synchronous belt electric starting device according to claim 8, characterized in that: The screw is sleeved with a bearing three, the external disc is rotatably connected to the bearing three, and the bearing three is located between the nut of the screw and the connecting column.

10. A lawn mower synchronous belt electric starting device according to claim 1 or 8, characterized in that: A coil spring is connected between the driven gear and the external disk. A mounting groove for placing the coil spring is provided on the driven gear. A spacer is fixed on the driven gear to limit the coil spring from leaving the mounting groove.

Images