Hand-pulling starting device and engine-driven operation device

Abstract

The utility model discloses a hand-pulling starting device which comprises a starting pull disc, a starting pull rope and a starting handle, an opening is formed in the starting pull disc, and the starting pull rope penetrates out of the starting pull disc through the opening and then is connected with the starting handle. The starting pull rope is sleeved with a guide pipe, and the end, facing the starting pull disc, of the guide pipe is right opposite to the opening. According to the utility model, direct friction between the pull rope and the opening of the starting pull disc is avoided, so that the starting pull rope can be prevented from being abraded, the service life of the pull rope is prolonged, and the service life of the hand-pulling starting device can be further prolonged. In addition, due to the arrangement of the guide pipe, the starting pull rope can be prevented from being wound, and normal use of the starting pull rope is guaranteed. The utility model further provides an operation device driven by an engine, and the hand-pulling starting device is adopted in the operation device.

Description

Technical Field

[0001] The utility model relates to a hand-pulling starting device, in particular to a hand-pulling starting device and an engine-driven operating device. Background Art

[0002] As a machine that can convert other forms of energy into mechanical energy, the engine is a very common device in daily life and industrial production. The hand pull starter is mostly used for small gasoline engines and diesel engines, also known as a hand pull recoil starter. The hand pull starter is a mechanical starter. The assembly is divided into two parts: the starter and the start dial. It is mainly composed of a starter cover, a starter handle, a pull rope, a starter wheel, a return spring and a fastening screw. The starter dial is mainly composed of a starter dial body, a starter claw and a torsion spring. When in use, the starter handle is pulled to drive the starter wheel wrapped with the starter rope to rotate. The starter wheel toggles the starter dial connected to the crankshaft of the gasoline engine, drives the crankshaft of the engine, and makes the piston reciprocate. The combustible mixture in the cylinder burns and expands to work, pushing the piston downward to rotate the crankshaft. Thus, the engine transitions from a static state to a working state, and the working cycle is automatically carried out. At this time, the starter dial rotates with the engine crankshaft, and the starter claw on the starter dial is separated from the starter wheel under the action of centrifugal force. The starter wheel compresses the return spring when the starter dial is turned. After the starter starts the engine, the starter wheel, pull rope and handle return to the starting position under the action of the return spring.

[0003] Chinese patent document CN205047345U discloses a pull starter, including a handle and a starter cover, wherein a buffer pad for buffering the collision between the handle and the starter cover is provided at the end of the handle close to the starter cover, and a hole for the pull rope to pass through is provided on the buffer pad. When the pull starter provided by the utility model is used, since the buffer pad is provided at the end of the handle, when the handle rebounds, due to the buffering effect of the buffer pad, the direct collision between the handle and the starter cover is converted into a soft contact through the transition effect of the buffer pad, thereby effectively reducing the noise generated by the collision. At the same time, since the handle acts on the buffer pad during rebound, direct contact between the handle and the starter cover is avoided, and the wear of the two is reduced, thereby effectively extending the service life of the pull starter. The utility model also discloses an engine including the above-mentioned pull starter.

[0004] In this prior art, although the buffer pad can reduce the wear of the handle, in actual use, in order to facilitate the operator to pull the handle, the way the handle is pulled is not in the same direction as the direction in which the pull rope passes through the starter cover. Therefore, when the pull rope is pulled, the pull rope will directly rub against the starter cover, causing the pull rope to wear. The pull rope may even break after being pulled multiple times, reducing the service life of the hand-pull starting device. Utility Model Content

[0005] In order to solve the technical problem in the prior art that the pull rope is worn out due to friction between the pull rope and the starter cover, the utility model provides a hand-pull starting device, including a starting pull disk, a starting pull rope and a starting handle. The starting pull disk is provided with an opening, and the starting pull rope passes through the opening from the starting pull disk and is connected to the starting handle; wherein: the starting pull rope is covered with a conduit, and one end of the conduit facing the starting pull disk is arranged opposite to the opening.

[0006] In this solution, the guide tube is used to guide the starter pull rope. Since the end of the guide tube facing the starter pull disk is arranged opposite to the opening, the starter pull rope passes through the starter pull disk and enters the guide tube straightly, thus avoiding direct friction between the pull rope and the opening of the starter pull disk, thereby avoiding wear of the starter pull rope, extending the service life of the pull rope, and further improving the service life of the hand-pull starter. In addition, the setting of the guide tube can also prevent the starter pull rope from being entangled, ensuring the normal use of the starter pull rope.

[0007] Preferably, a protective sleeve is provided in the opening, and the surface of the protective sleeve contacting the starter rope is a smooth curved surface. In this solution, the opening and the starter rope are separated by a protective sleeve, and the protective sleeve has a smooth curved surface, which can further reduce the wear of the starter rope and extend the service life of the hand-pull starter.

[0008] Preferably, the end of the conduit facing the starter handle is arranged opposite to the starter handle. This solution can further reduce the wear of the starter rope and extend the service life of the hand-pull starter.

[0009] Preferably, the conduit is a conduit with a smooth interior. This solution can further reduce the wear of the starter pull rope and extend the service life of the hand-pull starter.

[0010] In the second aspect, the utility model provides an engine-driven working device, including a shell, in which a power unit and a starting unit are arranged, and the power unit is transmission-connected with the starting unit, wherein the starting unit adopts a hand-pull starting device of any of the above-mentioned schemes, and a conduit is installed on the inner wall of the shell.

[0011] This solution can extend the service life of the hand-pulled starter by reducing the wear of the starter rope and ensure the normal starting of the engine.

[0012] Preferably, the housing is provided with an opening for the start handle to pass through, and the end of the conduit close to the start handle is arranged opposite to or against the opening. This solution can further reduce the wear of the start rope, extend the service life of the hand-pull start device, and ensure the normal start of the engine; and in this solution, the conduit can be used to guide the start rope, so that the opening is opened in any direction of the housing, and the start rope can be guided by the conduit to ensure the normal start of the engine, and the opening can also be opened at any position of the housing according to actual needs, which is convenient for operation.

[0013] The utility model has the following beneficial effects:

[0014] 1. It can avoid wear of the starting rope, prolong the service life of the rope, and thus improve the service life of the hand-pull starting device.

[0015] 2. It can prevent the starting rope from getting tangled and ensure the normal use of the starting rope.

[0016] 3. The starting rope is guided through the conduit to ensure the normal starting of the engine, so that the opening can be opened at any position of the shell according to actual needs, which is convenient for operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a partial schematic diagram of a hand-pulled starting device and an engine in an embodiment of the utility model;

[0018] Figure 2 for Figure 1 Partial schematic diagram of the middle hand-pull starter①;

[0019] Figure 3 for Figure 1 Partial schematic diagram of the middle hand-pull starting device②. DETAILED DESCRIPTION

[0020] The following is further described in detail through specific implementation methods:

[0021] The reference numerals in the drawings of the specification include: housing 1, engine 2, starter pull plate 3, starter pull rope 4, conduit 5, mounting bracket 6, starter handle 7, and protective cover 8.

[0022] The embodiment is basically as shown in the attached Figure 2 and Figure 3 As shown: a hand-pull starting device includes a starting pull disc 3, a starting pull rope 4 and a starting handle 7. The starting pull disc 3 is provided with an opening. The starting pull rope 4 passes through the opening and then passes through the starting pull disc 3 and is connected to the starting handle 7. A protective sleeve 8 is provided in the opening, and the surface of the protective sleeve 8 contacting the starting pull rope 4 is a smooth curved surface.

[0023] The start pull rope 4 is covered with a conduit 5, which is a conduit 5 with a smooth interior. One end of the conduit 5 facing the start pull plate 3 is arranged opposite to the opening, and one end of the conduit 5 facing the start handle 7 is arranged opposite to the start handle 7. The opening apertures at both ends of the conduit 5 are gradually reduced from the end of the conduit toward the middle of the conduit.

[0024] like Figure 1 As shown, this embodiment also discloses an engine 2, including a shell 1, in which a power unit and a starting unit are arranged, and the power unit is transmission-connected with the starting unit, wherein the starting unit adopts the above-mentioned hand-pull starting device, and the conduit 5 is fixed to the inner wall of the shell 1 through a mounting bracket 6. In this embodiment, the mounting bracket 6 adopts a U-shaped clip, and in other embodiments, the mounting bracket 6 can also adopt other connecting parts.

[0025] The housing 1 is provided with an opening for the start handle 7 to pass through, and the end of the conduit 5 close to the start handle 7 is arranged opposite to or against the opening. In this embodiment, the end of the conduit 5 close to the start handle 7 is arranged against the opening. The opening is arranged on the left side of the housing 1. In other embodiments, the opening can be arranged on the side that is convenient for the operator to pull the start rope 4 in actual use, and the installation of the conduit 5 in the housing 1 can also be adaptively adjusted according to the way of the opening.

[0026] The above is only an embodiment of the utility model. The common sense such as the known specific structure and characteristics in the scheme is not described in detail here. The ordinary technicians in the relevant field know all the common technical knowledge in the technical field of the utility model before the application date or priority date, can obtain all the existing technologies in the field, and have the ability to apply the conventional experimental means before that date. The ordinary technicians in the relevant field can improve and implement this scheme in combination with their own abilities under the enlightenment given by this application. Some typical known structures or known methods should not become obstacles for ordinary technicians in the relevant field to implement this application. It should be pointed out that for the technicians in this field, without departing from the structure of the utility model, several deformations and improvements can be made, which should also be regarded as the protection scope of the utility model, which will not affect the effect of the implementation of the utility model and the practicality of the patent. The protection scope required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to explain the content of the claims.

Claims

1. A hand-pull starting device, comprising a starting pull disc, a starting pull rope and a starting handle, wherein the starting pull disc is provided with an opening, and the starting pull rope passes through the opening and out of the starting pull disc and then is connected to the starting handle; characterized in that: The outer sleeve of the start pull rope is provided with a conduit, and one end of the conduit facing the start pull plate is arranged opposite to the opening; a protective sleeve is arranged in the opening, and the surface of the protective sleeve contacting the start pull rope is a smooth curved surface; the conduit is an internally smooth conduit.

2. The hand-pull starter device according to claim 1, characterized in that: One end of the conduit facing the starting handle is arranged directly opposite to the starting handle.

3. An engine-driven working device, comprising a housing, wherein a power unit and a starting unit are arranged in the housing, wherein the power unit is in transmission connection with the starting unit, and wherein: The starting part adopts the hand-pull starting device as described in claim 1 or 2, and the conduit is installed on the inner wall of the shell.

4. The engine-driven working device according to claim 3, characterized in that: The shell is provided with an opening for the starting handle to pass through, and one end of the conduit close to the starting handle is arranged opposite to or against the opening.

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