An engine starting device

Abstract

The utility model discloses an engine starting device, which includes a casing, a motor and a starting mechanism are arranged in the casing, the starting mechanism includes a transmission assembly and a starting assembly, the transmission assembly includes a first sprocket and a second sprocket, the first sprocket is fixedly arranged on the output shaft of the motor; the starting assembly includes a starting shaft, and an upper one-way bearing and a two-way bearing sleeved on the starting shaft, the second sprocket is fixedly sleeved on the outer ring of the one-way bearing, and the first sprocket and the second sprocket are connected by a chain transmission; the central axis of the starting shaft is parallel to the central axis of the motor output shaft, and the rotation direction of the output shaft is opposite to the rotation direction of the one-way bearing. The utility model can realize the electric starting of the engine through the cooperation of the transmission assembly and the starting assembly, which is labor-saving and efficient.

Description

Technical Field

[0001] The utility model belongs to the technical field of engine starting, and in particular relates to an engine starting device. Background Art

[0002] Engines are widely used in various mechanical tools, such as lawn mowers for mowing lawns and vegetation. The engine drives the blade to rotate quickly to achieve lawn mowing, which has high working efficiency. The existing gasoline engine lawn mowers are mostly started by manually pulling the rope. This starting method has high requirements on the operator's pulling force, pulling frequency and pulling skills, is time-consuming and labor-intensive, and the rope is easily damaged. Summary of the invention

[0003] The utility model aims to solve the problem that the engine starting mode of the lawn mower in the prior art is time-consuming and labor-intensive, and provides an engine starting device. The invention objective of the utility model is achieved through the following technical solutions:

[0004] An engine starting device comprises a casing, wherein a motor and a starting mechanism are arranged in the casing, wherein the starting mechanism comprises a transmission assembly and a starting assembly, wherein the transmission assembly comprises a first sprocket and a second sprocket, wherein the first sprocket is fixedly arranged on the output shaft of the motor; the starting assembly comprises a starting shaft, and an upper one-way bearing and a two-way bearing sleeved on the starting shaft, wherein the second sprocket is fixedly sleeved on the outer ring of the one-way bearing, and the first sprocket and the second sprocket are connected via a chain transmission; wherein the central axis of the starting shaft is parallel to the central axis of the motor output shaft, and the rotation direction of the output shaft is opposite to the rotation direction of the one-way bearing.

[0005] Preferably, the starting shaft is axially segmented, including an external section, a first assembly section and a second assembly section in sequence. The inner ring of the one-way bearing is fixedly sleeved in the first assembly section, and the inner ring of the two-way bearing is fixedly sleeved in the second assembly section; and the outer diameter of the first assembly section is greater than the outer diameter of the second assembly section.

[0006] Preferably, the second sprocket includes a centrally located sleeve portion and a toothed ring portion disposed on the periphery of the sleeve portion, and the sleeve portion includes a first sleeve and a second sleeve disposed on both sides of the toothed ring portion.

[0007] Preferably, the first sleeve is sleeved on the outer ring of the one-way bearing, the second sleeve is sleeved on the outer ring of the two-way bearing, and the inner diameter of the first sleeve is greater than the inner diameter of the second sleeve.

[0008] Preferably, a positioning plate is fixedly provided on the inner wall of the casing, and the motor is fixedly provided on the positioning plate; a protective cover is mounted on the outer wall of the casing, and the starting assembly is placed in the protective cover.

[0009] Preferably, a battery pack for driving the motor is detachably mounted on the housing, and the battery pack includes a base and an outer cover that are interlocked, and a cover plate is mounted on the top of the outer cover.

[0010] Preferably, an assembly plate is fixedly provided on the outer wall of the casing, and the assembly plate and the battery pack are provided with mutually cooperating plug-in structures.

[0011] Preferably, the insertion structure includes an insertion strip vertically arranged on the assembly plate, and a slot opened on the outer cover, the insertion strip and the slot both extend in the vertical direction, the upper end of the insertion strip is a free end, and the lower end of the slot is an open end.

[0012] Preferably, the outer cover is provided with an embedding block, the slots are provided on the embedding block, and there are two of them; the assembly plate is provided with an embedding groove for accommodating the embedding block, the insert strips are provided in the embedding groove, and there are two of them, respectively cooperating with the two slots.

[0013] Preferably, a support platform for supporting the embedding block is provided below the embedding groove.

[0014] Compared with the prior art, the utility model has the following technical effects: the electric starting of the engine can be realized through the cooperation of the transmission assembly and the starting assembly, which is more labor-saving and efficient than the pull-rope type mechanical starting; the starting assembly structure is reasonably arranged, and the cooperation of the one-way bearing and the two-way bearing can realize the electric starting of the engine and effectively reduce the rotational resistance of the starting shaft; the battery pack cooperates with the assembly plate to realize the detachable installation of the battery pack, and the plug-in structure is reasonably arranged, the battery pack is easy to disassemble and assemble, and the assembly is stable. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the structure of the utility model;

[0016] Figure 2 This is an exploded view of the utility model;

[0017] Figure 3 This is a schematic diagram of the structure of the starting mechanism in the utility model;

[0018] Figure 4 This is a schematic diagram of the plug-in structure in the utility model;

[0019] Figure 5 This is a schematic diagram of the transmission component structure in the utility model;

[0020] Figure 6 This is a schematic diagram of the structure of the starting component in the utility model;

[0021] Markings in the figure: housing 10; motor 20; first sprocket 31; second sprocket 32; gear ring portion 321; first bushing 322; second bushing 323; chain 33; starting shaft 41; external section 411; first assembly section 412; second assembly section 413; one-way bearing 42; two-way bearing 43; positioning plate 51; protective cover 52; battery pack 60; base 61; outer cover 62; insert 621; slot 622; cover plate 63; assembly plate 70; insert strip 71; support platform 72. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the embodiments shown in the accompanying drawings:

[0023] See also Figure 1 , Figure 2 This embodiment discloses an engine starting device, which is mainly used in lawn mowers, and includes a housing 10, in which a motor 20 and a starting mechanism are arranged, and the starting mechanism includes a transmission component and a starting component. A positioning plate 51 is fixedly arranged on the inner wall of the housing 10, and the motor 20 is fixedly arranged on the positioning plate 51; a protective cover 52 is installed on the outer wall of the housing 10, and the starting component is placed in the protective cover 52.

[0024] See also Figure 2 , Figure 3 , Figure 5 , Figure 6 The transmission assembly includes a first sprocket 31 and a second sprocket 32, and the first sprocket 31 is fixed on the output shaft of the motor 20; the starting assembly includes a starting shaft 41, and an upper one-way bearing 42 and a two-way bearing 43 sleeved on the starting shaft 41, the second sprocket 32 ​​is fixedly sleeved on the outer ring of the one-way bearing 42, and the first sprocket 31 and the second sprocket 32 ​​are connected by a chain 33; the central axis of the starting shaft 41 is parallel to the central axis of the output shaft of the motor 20, and the rotation direction of the output shaft is opposite to the rotation direction of the one-way bearing 42. When in use, the motor 20 is started first, and the output shaft of the motor 20 drives the first sprocket 31 and the second sprocket 32 ​​to rotate. The rotation direction of the second sprocket 32 ​​is opposite to the rotation direction of the one-way bearing 42. At this time, the one-way bearing 42 and the starting shaft 41 cannot rotate relative to each other, and the second sprocket 32 ​​drives the starting shaft 41 to rotate through the one-way bearing 42. After the engine is started, the motor 20 is stopped, the second sprocket 32 ​​and the first sprocket 31 stop rotating, and the starting shaft 41 continues to rotate under the action of the engine.

[0025] For easy assembly, the starter shaft 41 is divided into sections along the axial direction, including an external section 411, a first assembly section 412 and a second assembly section 413 in sequence. The inner ring of the one-way bearing 42 is fixedly sleeved in the first assembly section 412, and the inner ring of the two-way bearing 43 is fixedly sleeved in the second assembly section 413; and the outer diameter of the first assembly section 412 is greater than the outer diameter of the second assembly section 413; the second sprocket 32 ​​includes a sleeve portion located in the center, and a gear ring portion 321 arranged on the periphery of the sleeve portion, and the sleeve portion includes a first sleeve 322 and a second sleeve 323 arranged on both sides of the gear ring portion 321; the first sleeve 322 is sleeved on the outer ring of the one-way bearing 42, and the second sleeve 323 is sleeved on the outer ring of the two-way bearing 43, and the inner diameter of the first sleeve 322 is greater than the inner diameter of the second sleeve 323. The one-way bearing 42 and the two-way bearing 43 cooperate to realize the electric start of the engine and effectively reduce the rotation resistance of the starter shaft 41.

[0026] See also Figure 2 , Figure 4 A battery pack 60 for driving the motor 20 is detachably mounted on the casing 10, and the battery pack 60 includes a base 61 and an outer cover 62 that are interlocked with each other, and a cover plate 63 is mounted on the top of the outer cover 62; an assembly plate 70 is fixedly mounted on the outer wall of the casing 10, and a plug-in structure that cooperates with the assembly plate 70 and the battery pack 60 is provided.

[0027] The insertion structure includes an insertion strip 71 vertically arranged on the assembly plate 70, and a slot 622 opened on the outer cover 62. The insertion strip 71 and the slot 622 both extend in the vertical direction, and the upper end of the insertion strip 71 is a free end, and the lower end of the slot 622 is an open end. The outer cover 62 is provided with an insert block 621 protrudingly, and the slot 622 is opened on the insert block 621 and is provided with two slots. The assembly plate 70 is provided with an embedding groove for accommodating the embedding block 621. The insertion strip 71 is protruding in the embedding groove and is provided with two slots 622, respectively matching with the two slots 622. When assembling the battery pack 60, it is only necessary to align the slot 622 with the corresponding insertion strip 71, and then slide the battery pack 60 downward until the embedding block 621 completely enters the embedding groove, and the insertion strip 71 and the slot 622 are matched, that is, the installation of the battery pack 60 is completed. Similarly, the battery pack 60 can be removed by sliding the battery pack 60 upward. In order to further improve the assembly stability of the battery pack 60 , a support platform 72 for supporting the embedding block 621 is further provided below the embedding groove.

[0028] It should be understood that in the claims and description of the utility model, all "including..." should be understood as open-ended meanings, that is, their meanings are equivalent to "at least including...", and should not be understood as closed-ended meanings, that is, their meanings should not be understood as "only including...". The terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated.

[0029] The above is only a specific implementation of the present invention, but the protection scope of the present invention is not limited thereto. Any changes, modifications, additions or substitutions made by technicians in this technical field within the essential scope of the present invention should be covered by the protection scope of the utility model.

Claims

1. An engine starting device, characterized in that: It includes a casing, in which a motor and a starting mechanism are arranged, the starting mechanism includes a transmission assembly and a starting assembly, the transmission assembly includes a first sprocket and a second sprocket, the first sprocket is fixedly arranged on the output shaft of the motor; the starting assembly includes a starting shaft, and an upper one-way bearing and a two-way bearing sleeved on the starting shaft, the second sprocket is fixedly sleeved on the outer ring of the one-way bearing, and the first sprocket and the second sprocket are connected by a chain transmission; the central axis of the starting shaft is parallel to the central axis of the motor output shaft, and the rotation direction of the output shaft is opposite to the rotation direction of the one-way bearing.

2. An engine starting device according to claim 1, characterized in that: The starting shaft is divided into sections along the axial direction, including an external section, a first assembly section and a second assembly section in sequence. The inner ring of the one-way bearing is fixedly sleeved in the first assembly section, and the inner ring of the two-way bearing is fixedly sleeved in the second assembly section; and the outer diameter of the first assembly section is greater than the outer diameter of the second assembly section.

3. An engine starting device according to claim 2, characterized in that: The second sprocket includes a sleeve portion located in the center and a gear ring portion arranged on the periphery of the sleeve portion, and the sleeve portion includes a first sleeve and a second sleeve respectively arranged on both sides of the gear ring portion.

4. An engine starting device according to claim 3, characterized in that: The first sleeve is sleeved on the outer ring of the one-way bearing, the second sleeve is sleeved on the outer ring of the two-way bearing, and the inner diameter of the first sleeve is greater than the inner diameter of the second sleeve.

5. The engine starting device according to claim 1, characterized in that: A positioning plate is fixedly arranged on the inner wall of the casing, and the motor is fixedly arranged on the positioning plate; a protective cover is mounted on the outer wall of the casing, and the starting assembly is placed in the protective cover.

6. An engine starting device according to any one of claims 1 to 5, characterized in that: The housing is detachably equipped with a battery pack for driving the motor. The battery pack includes a base and an outer cover that are buckled together, and a cover plate is mounted on the top of the outer cover.

7. An engine starting device according to claim 6, characterized in that: An assembly plate is fixedly arranged on the outer wall of the casing, and a plug-in structure cooperating with each other is arranged on the assembly plate and the battery pack.

8. An engine starting device according to claim 7, characterized in that: The insertion structure comprises an insertion strip vertically arranged on the assembly plate and a slot opened on the outer cover. The insertion strip and the slot both extend vertically, and the upper end of the insertion strip is a free end, and the lower end of the slot is an open end.

9. An engine starting device according to claim 8, characterized in that: The outer cover is provided with an embedded block, and the slots are provided on the embedded block, and there are two of them; the assembly plate is provided with an embedded groove for accommodating the embedded block, and the insert strips are provided in the embedded groove, and there are two of them, respectively matching with the two slots.

10. An engine starting device according to claim 9, characterized in that: A support platform for supporting the embedding block is provided below the embedding groove.

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