A combination switch for internal combustion engine driven working machinery

Abstract

The present invention belongs to the field of non-electrical combined control devices for multiple functions of internal combustion engines, and is specifically a combination switch for internal combustion engine driven working machinery, including a switch seat, a fuel switch, a cable, a cable shaft, a gear structure, and a switch handle. The fuel switch is connected to the switch seat, a sleeve is sleeved on the cable, and the fuel switch is provided with a non-cylindrical switch shaft. The switch shaft is linked with a toggle member that is engaged and engaged with a micro switch that controls the flameout switch. The cable shaft is provided with a non-cylindrical connection hole that is matched with the switch shaft. The end of the switch shaft away from the fuel switch passes through the connection hole and is statically connected to the switch handle, so that the switch handle and the switch seat together form a structure that surrounds the cable shaft and the gear structure; the sleeve is clamped and fixed to the switch seat. This solution solves the problem that the combination switch structure in the prior art is complex and inconvenient to maintain.

Description

Technical Field

[0001] The present invention belongs to the field of non-electrical combined control devices for multiple functions of internal combustion engines, and in particular is a combination switch for internal combustion engine driven working machinery. Background Art

[0002] The combination switch for internal combustion engine driven working machinery includes a fuel switch, a cable for controlling the choke, a micro switch for controlling the flameout switch, a gear structure and a switch handle for operation. It generally includes a start gear, a running gear and a stop gear. Some also have oil gears. The fuel switch, the cable and the micro switch can be operated at the same time through the switch handle, thereby reducing the user's operating steps; its functions in different gears are roughly as follows:

[0003] ① Starting gear: put the fuel switch in the open position, the choke in the closed position, and the flameout switch in the open position;

[0004] ② Operation gear: set the fuel switch to the open position, the choke to the open position, and the flameout switch to the open position;

[0005] ③ Stop gear: set the fuel switch to the off position, the choke to the open position, and the flameout switch to the off position;

[0006] Of course, in some implementation cases, there is an oil-off gear between the running gear and the stopping gear: the fuel switch is in the off position, the choke is in the open position, and the flameout switch is in the on position.

[0007] Existing combination switches are mainly divided into two forms: one form is the loose parts type, in which the components of the combination switch are separately assembled on the switch mounting plate of the terminal product. This method requires users to disassemble some or all of the components of the combination switch during daily maintenance and general overhaul, which not only brings inconvenience to maintenance, but also makes it easy to lose some small parts. The other form is to assemble the combination switch itself into an assembly, and then assemble it with the terminal, but this method is often more complicated in structure. Not only does it require the switch base to install the cable, micro switch, fuel switch, gear structure, etc. used to control the choke, but it is also necessary to set a switch cover plate that matches the switch base to prevent the components installed on the switch base from scattering during transportation, etc. For example, the patent document with the publication number CN211038847U discloses "a combination switch for variable frequency generators, the switch includes a switch base and a switch cover that cooperate with each other, and is characterized in that: in the switch base and the switch cover surrounded by A cam mechanism and a micro switch are arranged in the cavity, a choke cable extending out of the switch base is arranged on the cam mechanism, a switch handle and a fuel switch connected to the cam mechanism are arranged on the upper end surface of the switch cover and the lower end surface of the switch base respectively, and the switch handle is connected to the fuel switch by a screw; a gear slideway matched with the cam mechanism is arranged on the inner bottom of the switch base. Due to the large number of parts, the difficulty of assembling and processing the combination switch is increased, and the probability of damage to the parts during frequent use is also increased, which affects the service life of the combination switch, and the complex structure will also cause inconvenience to daily maintenance and repair. Summary of the invention

[0008] The object of the present invention is to provide a combination switch for an internal combustion engine driven working machine which has a simple structure and is convenient to maintain.

[0009] In order to achieve the above-mentioned purpose, the scheme of the present invention provides a combination switch for an internal combustion engine driven working machinery, including a switch seat, a fuel switch, a cable, a cable shaft, a gear structure, and a switch handle. The fuel switch is connected to the switch seat, the cable is sleeved with a sleeve, the fuel switch is provided with a non-cylindrical switch shaft, the switch shaft is linked to be provided with a toggle member that cooperates with a micro switch that controls the flameout switch, the cable shaft is provided with a non-cylindrical connecting hole that cooperates with the switch shaft, the end of the switch shaft away from the fuel switch passes through the connecting hole and is statically connected to the switch handle, so that the switch handle and the switch seat together form a structure that surrounds the cable shaft and the gear structure; the sleeve is clamped and fixed to the switch seat.

[0010] The principle and beneficial effects of this basic scheme are: the fuel switch is connected and fixed by the switch seat, and the cable shaft is connected to the switch shaft of the fuel switch to realize the connection and fixation of the switch shaft to the cable shaft. At the same time, the toggle member for controlling the ignition off switch is linked with the switch shaft, and the switch handle is statically connected with the switch shaft of the fuel switch, so that the switch handle and the cable shaft are both fixed to the switch seat through the indirect connection of the fuel switch, so that the switch handle and the switch seat surround the various components of the combination switch set on the switch shaft to form a whole. At the same time, the sleeve set on the cable is also clamped and fixed on the switch seat, so that the cable is also fixed on the switch seat, and then the components of the entire combination switch will not be scattered without the need to set a switch cover plate, thereby simplifying the structure of the combination switch, and the need to set a switch cover plate also reduces the manufacturing cost.

[0011] Furthermore, a micro switch cooperating with the toggle member is statically connected to the switch seat. With such an arrangement, when the combination switch is installed in place, the micro switch is also installed synchronously, thereby reducing the number of separate connection arrangements of the micro switch, which is beneficial to the installation operation.

[0012] Furthermore, the toggle member is a cam structure integrally formed with the cable shaft. With such a configuration, the toggle member can be driven to rotate by the rotation of the cable shaft, thereby reducing the connection operation between the toggle member and the switch shaft.

[0013] Furthermore, the toggle member and the shift structure are both located on the same side of the cable shaft. With such a configuration, the shift structure will occupy a certain space on one side of the cable shaft, and the space is used to set the toggle member, thereby making the entire structure more compact, which is beneficial to reducing the volume of the entire combination switch. At the same time, the toggle member and the cable shaft are integrally formed, which also reduces the connection operation of the toggle member, simplifies the assembly operation steps, and is beneficial to improving production efficiency.

[0014] Furthermore, the toggle member is a cam structure integrally formed with the switch handle.

[0015] Furthermore, the switch handle is provided with a countersunk hole that matches the switch shaft. This arrangement facilitates the connection of the switch handle and the switch shaft and achieves synchronous rotation, and the insertion of the switch shaft into the countersunk hole also facilitates the switch handle to limit the cable shaft, thereby reducing the moving space of the cable shaft along the switch shaft and ensuring the stability of the cable shaft during use.

[0016] Furthermore, the switch seat is provided with a slot, and the sleeve is fixedly engaged in the slot. The sleeve is fixed by the slot, and when the sleeve is fixed, it is only necessary to press the sleeve into the slot, thereby facilitating the operation.

[0017] Furthermore, the depth of the slot is not less than the radius of the sleeve. This arrangement makes it easier for the sleeve to be clamped in the slot.

[0018] Furthermore, the depth of the slot is equal to the radius of the sleeve. With such a configuration, when the sleeve is embedded in the slot, the sleeve will not be exposed outside the slot, thereby keeping the end surface of the switch seat flat and facilitating the subsequent installation and connection of the switch seat.

[0019] Furthermore, the gear structure includes a gear slide groove arranged on the switch seat and a steel ball limiting hole arranged on the cable shaft, a steel ball is slidably arranged in the steel ball limiting hole, and the steel ball limiting hole is provided with a spring to keep the steel ball in contact with the gear slide groove. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a structural schematic diagram of an embodiment of a combination switch for an internal combustion engine driven working machine of the present invention;

[0021] Figure 2 for Figure 1 An exploded view of the structure of an embodiment of the present invention;

[0022] Figure 3 A partial cross-sectional view of an embodiment of the present invention;

[0023] Figure 4 for Figure 2 Schematic diagram of the local structure of the connection between the middle switch seat and the cable. DETAILED DESCRIPTION

[0024] The following is further described in detail through specific implementation methods:

[0025] The figure marks in the drawings of the specification include: fuel switch 1, switch shaft 11, switch seat 2, slot 21, accommodating chamber 22, cable shaft 3, connecting hole 31, cable 4, sleeve 41, micro switch 5, steel ball 61, spring 62, steel ball limit hole 63, gear slide groove 64, switch handle 7, countersunk hole 71, screw 8, and toggle member 9.

[0026] The embodiment is basically as shown in the attached Figure 1 , Figure 2 , Figure 3 and Figure 4As shown: a combination switch for an internal combustion engine driven working machine, comprising a switch base 2, a fuel switch 1, a cable 4, a cable shaft 3, a micro switch 5, a gear structure and a switch handle 7; the switch base 2 is a semi-enclosed structure with an open accommodating cavity 22, the fuel switch 1 is connected to the switch base 2 by bolts, and a switch shaft 11 is arranged on the fuel switch 1, and the cross section of the switch shaft 11 is non-circular. In this embodiment, the cross section of the switch shaft 11 is preferably rectangular, and the switch shaft 11 extends into the accommodating cavity 22 of the switch base 2.

[0027] The cable shaft 3 is located in the accommodating cavity 22 . A rectangular connecting hole 31 matching the switch shaft 11 is provided on the cable shaft 3 . The cable shaft 3 is sleeved on the switch shaft 11 through the connecting hole 31 to achieve synchronous rotation of the cable shaft 3 and the switch shaft 11 . One end of the cable 4 passes through the switch seat 2 and is connected to the cable shaft 3. A sleeve 41 is movably sleeved on the cable 4. In this embodiment, the sleeve 41 is preferably a T-shaped sleeve 41 with a flange. A slot 21 is provided at the open portion of the accommodating chamber 22 on the switch seat 2. The depth of the slot 21 is equal to the diameter of the sleeve 41, so that the sleeve 41 will not protrude out of the slot 21 when it is engaged and fixed in the slot 21, and a limiting convex bump is provided at the opening of the slot 21. When the sleeve 41 is embedded in the slot 21, the limiting convex bump will prevent the sleeve 41 from sliding out of the slot 21, so that the sleeve 41 is fixed in the slot 21, so that the radial and axial directions of the sleeve 41 are restricted and fixed.

[0028] The gear structure is located on the side of the cable shaft 3 facing the fuel switch 1. The gear structure includes a gear fixing part and a gear movable part. The gear fixing part is a gear slide 64 in the shape of a tooth. The gear slide 64 is located on the inner side of the accommodating cavity 22 and is formed integrally with the switch seat 2. The gear movable part includes a steel ball limiting hole 63 formed integrally with the cable shaft 3. The steel ball limiting hole 63 is provided with a steel ball 61 slidingly arranged at one end of the gear slide 64. A spring 62 is arranged in the steel ball limiting hole 63 to keep the steel ball in contact with the gear slide 64. The steel ball limiting hole 63 is driven by the rotation of the cable shaft 3 to move along the gear slide 64 through the steel ball limiting hole 63, thereby realizing the gear sense. A toggle member 9 is also arranged on the side of the cable shaft 3 where the gear structure is arranged. In this embodiment, the toggle member 9 is a cam structure and is formed integrally with the cable shaft 3.

[0029] The micro switch 5 is arranged inside the accommodating cavity 22 and fixed to the switch seat 2 by bolts. The micro switch 5 is engaged and disengaged with the toggle member 9. The toggle member 9 is driven by the rotation of the cable shaft 3 to control the opening and closing of the micro switch 5. The switch handle 7 is located at the end of the switch shaft 11. The switch handle 7 is provided with a rectangular countersunk hole 71 that matches the switch shaft 11. The switch handle 7 is also provided with a mounting hole that passes through the bottom of the countersunk hole 71. The switch shaft 11 is inserted into the countersunk hole 71 and the switch handle 7 is connected to the switch shaft 11 through the mounting hole using a screw 8.

[0030] The specific implementation process is as follows: when assembling the combination switch, the fuel switch 1 is fixed on the switch base 2 by bolt connection, the micro switch 5 is connected and fixed on the switch base 2, the cable 4 is connected to the cable shaft 3, the steel ball 61 and the spring 62 of the gear structure are installed in the steel ball limiting hole 63, and then the cable shaft 3 is sleeved on the switch shaft 11 of the fuel switch 1, the switch handle 7 is connected to the end of the switch shaft 11, and the sleeve 41 on the cable 4 is inserted into the slot 21 on the switch base 2, and the assembly of the entire combination switch is completed. After the switch handle 7 is directly connected to the switch shaft 11, a limiting effect is formed on the cable shaft 3, so that the cable shaft 3 will not be separated from the switch shaft 11. At the same time, the cable 4 is clamped on the switch base 2 through the sleeve 41, so that the parts of the entire combination switch are limited, and the problem of scattered parts will not occur when the switch cover is not set, so that the combination switch is still convenient for packaging, transportation and other operations, and the cost of the combination switch is reduced due to the reduction of parts.

[0031] The micro switch in this embodiment can also be separated from the switch seat, and the micro switch can be fixed on the terminal where the combination switch is installed, so as to further reduce the volume of the combination switch. The toggle member can also be a cam structure integrally formed with the switch handle.

[0032] The above is only an embodiment of the present invention, and the common knowledge such as the known specific structure and characteristics in the scheme is not described in detail here. It should be pointed out that for those skilled in the art, several deformations and improvements can be made without departing from the structure of the present invention, which should also be regarded as the protection scope of the present invention, and these will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection 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 interpret the content of the claims.

Claims

1. A combination switch for an internal combustion engine driven working machine, comprising a switch seat, a fuel switch, a cable, a cable shaft, a gear structure, and a switch handle, wherein the fuel switch is connected to the switch seat, a sleeve is sleeved on the cable, the fuel switch is provided with a non-cylindrical switch shaft, and a toggle member that engages with a micro switch that controls a flameout switch is provided on the switch shaft, characterized in that: The cable shaft is provided with a non-cylindrical connecting hole which cooperates with the switch shaft. The end of the switch shaft away from the fuel switch passes through the connecting hole and is statically connected to the switch handle, so that the switch handle and the switch seat together form a structure that surrounds the cable shaft and the gear structure; the sleeve is clamped and fixed to the switch seat.

2. A combination switch for an internal combustion engine driven working machine according to claim 1, characterized in that: The switch seat is statically connected with a micro switch matched with the toggle member.

3. A combination switch for an internal combustion engine driven working machine according to claim 1, characterized in that: The toggle member is a cam structure integrally formed with the cable shaft.

4. A combination switch for an internal combustion engine driven working machine according to claim 3, characterized in that: The toggle member and the gear structure are both located on the same side of the cable shaft.

5. A combination switch for an internal combustion engine driven working machine according to claim 1, characterized in that: The toggle member is a cam structure integrally formed with the switch handle.

6. A combination switch for an internal combustion engine driven working machine according to any one of claims 1 to 5, characterized in that: The switch handle is provided with a countersunk hole matched with the switch shaft.

7. A combination switch for an internal combustion engine driven working machine according to any one of claims 1 to 5, characterized in that: The switch seat is provided with a slot, and the sleeve is fixedly embedded in the slot.

8. A combination switch for an internal combustion engine driven working machine according to claim 7, characterized in that: The depth of the slot is not less than the radius of the sleeve.

9. A combination switch for an internal combustion engine driven working machine according to claim 8, characterized in that: The depth of the slot is equal to the radius of the sleeve.

10. A combination switch for an internal combustion engine driven working machine according to any one of claims 1 to 5, characterized in that: The gear structure includes a gear slide groove arranged on the switch seat and a steel ball limiting hole arranged on the cable rotating shaft. A steel ball is slidably arranged in the steel ball limiting hole, and the steel ball limiting hole is provided with a spring to keep the steel ball in contact with the gear slide groove.

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