Diesel engine extinguisher with sealing structure

Abstract

The utility model discloses a diesel engine extinguisher with a sealing structure, which comprises a shell and an end cover which are fixedly connected with each other, a wiring harness is led out from the rear side of the shell, a sealing ring is locked between the combining parts of the shell and the end cover, and the end faces of the two sides of the sealing ring are respectively and correspondingly tightly attached to the front end face of the shell and the rear end face of the end cover. The lead-out part of the wire harness is sleeved with a sealing sleeve, and the sealing sleeve is locked outside the lead-out part of the wire harness through a locking sleeve. According to the utility model, the sealing ring is arranged between the joint parts of the shell and the end cover, and the sealing ring can be locked between the joint parts of the shell and the end cover after the shell and the end cover are fixedly connected through fasteners (bolts and the like), so that the effective sealing area is large, and the sealing ring is not easy to deform and loosen; and meanwhile, the sealing sleeve is locked outside the leading-out part of the wire harness by adopting the locking sleeve, so that the locking sleeve is prevented from being deformed due to thermal expansion and cold contraction, and the sealing effect is effectively improved.

Description

Technical Field

[0001] The utility model relates to the technical field of diesel engine flameout devices, in particular to a diesel engine flameout device with a sealing structure. Background Art

[0002] A diesel engine is an engine that burns diesel to release energy. Its advantages are high torque and good economic performance. Since the fuel used in a diesel engine is diesel, its viscosity is greater than that of gasoline and it is not easy to evaporate, but its auto-ignition temperature is lower than that of gasoline. Therefore, the formation and ignition of the combustible mixture are different from those of a gasoline engine. The main difference is that the mixture in the cylinder of a diesel engine is compression ignited, not ignited.

[0003] When a diesel engine is working, air enters the cylinder. When the air in the cylinder is compressed to the end, the temperature can reach 500-700℃ and the pressure can reach 40-50 atmospheres. When the piston approaches the top dead center, the fuel injection nozzle of the fuel supply system sprays fuel into the cylinder combustion chamber at extremely high pressure in a very short time. The diesel forms fine oil particles and mixes with the high-pressure and high-temperature air. The combustible mixture burns by itself, expands violently, and generates explosive force, pushing the piston downward to do work. At this time, the temperature can reach 1900-2000℃, the pressure can reach 60-100 atmospheres, and the torque generated is very large. Therefore, diesel engines are widely used in large diesel equipment, such as forklifts, trucks, etc.

[0004] As an important control device for opening and closing the throttle switch (throttle or air damper switch), the diesel engine flameout device mainly includes a housing and an end cover that are fixedly connected by fasteners (bolts, etc.). An electric drive component is installed in the housing, and the pull wire (wire rope) connected to its drive end is led out from the front side of the end cover, and its wiring harness is led out from the rear side of the housing. The front end of the pull wire is connected to the rocker arm of the throttle switch, and the pull wire is driven by the electric drive component to retract and retract, thereby closing the throttle switch and playing the role of "extinguishing the flame".

[0005] At present, in order to achieve sealing and prevent dust, water, etc. from entering and affecting the service life of the internal electric drive components, a sealing ring is usually embedded on the inner edge of the front port of the shell. Since the inner wall of the shell is thin, the sealing ring is not fixed stably enough and is easy to loosen, resulting in poor sealing effect. In addition, for the sealing of the wire harness, a sealing ring or a sealing sleeve is only set between the lead-out part of the wire harness and the lead-out hole on the rear side of the shell. Under the influence of thermal expansion and contraction, the sealing ring or the sealing sleeve is easy to deform, which is easy to cause dust, water, etc. to enter, thereby adversely affecting the service life of the internal electric drive components. Summary of the invention

[0006] The purpose of the utility model is to overcome the defects and shortcomings of the prior art and to provide a diesel engine flameout device with a sealing structure, in which a sealing ring is locked between the joint of a housing and an end cover to increase the effective sealing area and prevent it from being deformed and loosened; at the same time, a locking sleeve is used to lock the sealing sleeve to the outside of the lead-out portion of the wiring harness to avoid deformation of the locking sleeve due to thermal expansion and contraction, thereby improving the sealing effect.

[0007] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0008] A diesel engine flameout device with a sealing structure comprises a housing and an end cover which are fixedly connected to each other, a wiring harness is led out from the rear side of the housing, and is characterized in that: a sealing ring is locked between the joint of the housing and the end cover, and the end faces on both sides of the sealing ring are respectively closely fitted with the front end face of the housing and the rear end face of the end cover, a sealing sleeve is sheathed on the outside of the lead-out part of the wiring harness, and a locking sleeve is provided to lock the sealing sleeve to the outside of the lead-out part of the wiring harness;

[0009] A lead-out hole for leading out the wire harness is provided in the middle of the rear side of the housing, and an outer surface of the rear side of the housing is provided with an integrally connected cylindrical locking seat around the lead-out hole, and an outer wall of the cylindrical locking seat is provided with an external thread;

[0010] The sealing sleeve includes a thick-walled portion, a tapered portion and a thin-walled portion which are integrally connected in sequence, and the thick-walled portion is sleeved on the inside of the cylindrical locking seat; the locking sleeve includes a wide-diameter portion and a narrow-diameter portion which are integrally connected in sequence, the inner wall of the wide-diameter portion is provided with an internal thread, the inner hole of the narrow-diameter portion is a tapered hole which is larger inside and smaller outside, the wide-diameter portion is screwed onto the outside of the cylindrical locking seat by threaded fitting, the inner wall of the tapered hole abuts against the outer walls of the tapered portion and the thin-walled portion, and the sealing sleeve is locked onto the outside of the lead-out portion of the wiring harness.

[0011] Furthermore, a plurality of threaded blind holes are respectively provided around the front end surface of the shell, and a plurality of threaded through holes penetrating the front and rear end surfaces of the end cover are respectively provided around the end cover. The plurality of threaded through holes respectively correspond to the plurality of threaded blind holes one by one, and bolts are screwed into the corresponding threaded through holes and threaded blind holes in sequence from front to back to fix the shell and the end cover together.

[0012] Furthermore, the sealing ring is provided with a plurality of through holes around its periphery for respectively allowing a plurality of the bolts to pass through.

[0013] Furthermore, the outer wall of the locking sleeve is a regular hexagonal structure.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model arranges a sealing ring between the joint of the shell and the end cover. After the shell and the end cover are fixedly connected by fasteners (bolts, etc.), the sealing ring can be locked between the joint of the two, with a large effective sealing area and is not easy to deform or loosen. At the same time, a locking sleeve is used to lock the sealing sleeve to the outside of the lead-out part of the wire harness, thereby avoiding deformation of the locking sleeve due to thermal expansion and contraction, thereby effectively improving the sealing effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 The structure of the utility model is shown in FIG. Figure 1 .

[0017] Figure 2 The structure of the utility model is shown in FIG. Figure 2 .

[0018] Figure 3 It is a structural sectional view of the utility model.

[0019] Figure 4 for Figure 3 Schematic diagram of the enlarged structure of part A.

[0020] Figure 5 for Figure 3 Schematic diagram of the enlarged structure of part B.

[0021] Figure 6 It is a structural schematic diagram of the sealing ring in the utility model. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-6 A diesel engine flameout device with a sealing structure includes a shell 1 and an end cover 2 which are fixedly connected to each other, a wiring harness 3 is led out from the rear side of the shell 1, a sealing ring 4 is locked between the joint of the shell 1 and the end cover 2, and the end faces of the sealing ring 4 are tightly fitted with the front end face of the shell 1 and the rear end face of the end cover 2 respectively, a sealing sleeve 5 is sleeved on the outside of the lead-out part of the wiring harness 3, and a locking sleeve 6 is used to lock the sealing sleeve 5 to the outside of the lead-out part of the wiring harness 3.

[0024] In the utility model, four threaded blind holes (not shown in the figure) are respectively provided around the front end surface of the shell 1, and four threaded through holes 7 penetrating the front and rear end surfaces of the end cover 2 are respectively provided around the end cover 2. The four threaded through holes 7 correspond to the four threaded blind holes one by one, and bolts (not shown in the figure) are screwed into the corresponding threaded through holes 7 and the threaded blind holes in sequence from front to back, so as to realize the fixed connection between the shell 1 and the end cover 2, and at the same time, the sealing ring 4 is locked between the joint of the shell 1 and the end cover 2.

[0025] In the present invention, four through holes 8 are respectively provided around the sealing ring 4 so as to allow four bolts to pass through respectively.

[0026] In the utility model, a lead-out hole 9 for leading out the wire harness is provided in the middle of the rear side of the housing 1, and an outer surface of the rear side of the housing 1 is provided with an integrally connected cylindrical locking seat 10 around the lead-out hole 9, and the outer wall of the cylindrical locking seat 10 is provided with an external thread.

[0027] In the utility model, the sealing sleeve 5 includes a thick-walled portion 51, a tapered portion 52 and a thin-walled portion 53 which are integrally connected in sequence, and the thick-walled portion 51 is sleeved inside the cylindrical locking seat 10; the locking sleeve 6 includes a wide-diameter portion 61 and a narrow-diameter portion 62 which are integrally connected in sequence, the inner wall of the wide-diameter portion 61 is provided with an internal thread, and the inner hole of the narrow-diameter portion 62 is a tapered hole which is larger inside and smaller outside.

[0028] Thus, when the locking sleeve 6 is screwed onto the outside of the cylindrical locking seat 10, that is, when the wide diameter portion 61 is screwed onto the outside of the cylindrical locking seat 10, the inner wall of the tapered hole abuts against the outer walls of the tapered portion 52 and the thin-walled portion 53, thereby locking the sealing sleeve 6 onto the outside of the lead-out portion of the wiring harness 3.

[0029] In the present invention, the outer wall of the locking sleeve 6 is a regular hexagonal structure, so as to facilitate operation with tools such as a wrench.

[0030] The utility model is further described below in conjunction with the accompanying drawings:

[0031] During assembly, the electric drive component 11 is first installed inside the housing 1, the pull wire 12 (wire rope) connected to its drive end is led out from the front side of the end cover 2, and the wire harness 3 is led out from the lead-out hole 9 on the rear side of the housing 1.

[0032] Next, place the sealing ring 4 between the outer shell 1 and the end cover 2, and screw the four bolts into the corresponding threaded through holes 7 and threaded blind holes from front to back in sequence to fix the outer shell 1 and the end cover 2 together. At this time, the sealing ring 4 is locked between the joint of the outer shell 1 and the end cover 2, thereby increasing the effective sealing area, and the sealing ring 4 is not easy to deform and loosen, thereby effectively improving the sealing effect.

[0033] Then, the sealing sleeve 5 is put on the outside of the lead-out part of the wiring harness 3, and the thick-walled part 51 is put into the inside of the cylindrical locking seat 10, and then the locking sleeve 6 is screwed to the outside of the cylindrical locking seat 10, that is, the wide-diameter part 61 is screwed to the outside of the cylindrical locking seat 10. At this time, the inner wall of the tapered hole abuts against the outer walls of the tapered part 52 and the thin-walled part 53, so that the sealing sleeve 6 is locked to the outside of the lead-out part of the wiring harness 3, thereby avoiding deformation of the locking sleeve 5 due to thermal expansion and contraction, thereby effectively improving the sealing effect.

[0034] Although this specification is described according to implementation modes, not every implementation mode includes only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0035] Therefore, the above description is only a preferred embodiment of the present application and is not intended to limit the scope of implementation of the present application; that is, all equivalent changes made according to the scope of the claims of the present application are within the protection scope of the claims of the present application.

Claims

1. A diesel engine flameout device with a sealed structure, comprising a housing and an end cover fixedly connected to each other, a wiring harness is led out from the rear side of the housing, and is characterized in that: A sealing ring is locked between the joint of the housing and the end cover, and the end faces of the sealing ring are respectively and closely fitted with the front end face of the housing and the rear end face of the end cover. A sealing sleeve is sleeved on the outside of the lead-out part of the wiring harness, and a locking sleeve is used to lock the sealing sleeve to the outside of the lead-out part of the wiring harness; A lead-out hole for leading out the wire harness is provided in the middle of the rear side of the housing, and an outer surface of the rear side of the housing is provided with an integrally connected cylindrical locking seat around the lead-out hole, and an outer wall of the cylindrical locking seat is provided with an external thread; The sealing sleeve includes a thick-walled portion, a tapered portion and a thin-walled portion which are integrally connected in sequence, and the thick-walled portion is sleeved on the inside of the cylindrical locking seat; the locking sleeve includes a wide-diameter portion and a narrow-diameter portion which are integrally connected in sequence, the inner wall of the wide-diameter portion is provided with an internal thread, the inner hole of the narrow-diameter portion is a tapered hole which is larger inside and smaller outside, the wide-diameter portion is screwed onto the outside of the cylindrical locking seat by threaded fitting, the inner wall of the tapered hole abuts against the outer walls of the tapered portion and the thin-walled portion, and the sealing sleeve is locked onto the outside of the lead-out portion of the wiring harness.

2. A diesel engine flameout device with a sealing structure according to claim 1, characterized in that: A plurality of threaded blind holes are respectively arranged around the front end surface of the shell, and a plurality of threaded through holes penetrating the front and rear end surfaces of the end cover are respectively arranged around the end cover. The plurality of threaded through holes respectively correspond to the plurality of threaded blind holes one by one, and bolts are screwed into the corresponding threaded through holes and threaded blind holes in sequence from front to back to fix the shell and the end cover together.

3. A diesel engine flameout device with a sealing structure according to claim 2, characterized in that: The sealing ring is provided with a plurality of through holes around its periphery for correspondingly allowing a plurality of the bolts to pass through.

4. A diesel engine flameout device with a sealing structure according to claim 1, characterized in that: The outer wall of the locking sleeve is a regular hexagonal structure.

Images