Safety core structure of air inlet channel of engine

Abstract

The invention discloses a safety core structure of an air inlet passage of an engine, which belongs to the technical field of filtering devices and comprises a ventilated base guide mechanism and a cap top telescopic mechanism. The cap top telescopic mechanism is arranged in the air inlet channel through the base guide mechanism; the hat top telescopic mechanism can be unfolded and folded, enters the air inlet opening in the folded state and is unfolded in the air inlet to form a blocking layer. The device can be arranged at the air inlet port of the engine, so that foreign matters are effectively blocked, and the problem that dust and large-particle foreign matters enter the air inlet port of the engine is fundamentally solved.

Description

Technical Field

[0001] The present invention belongs to the technical field of filtering devices, and particularly relates to a safety core structure for an engine intake duct. Background Art

[0002] With the wide application of high-pressure engines in various vehicle models, higher requirements are put forward for the intake reliability of the high-pressure supply system. The cylinders of high-pressure engines adopt a "V" type layout scheme, with the opening facing the engine intake port.

[0003] During the maintenance of the engine, large-particle foreign objects (such as standard parts, tools, etc.) and small-particle foreign objects (such as dust, debris, etc.) are very likely to fall into the intake duct. Due to the large volume and heavy weight of the engine, once foreign objects enter the intake duct, the cleaning work is extremely difficult, and even the engine needs to be disassembled to remove the foreign objects. If the cleaning is not thorough, the remaining foreign objects may pose a great risk to the safe use of the engine.

[0004] Due to the limited layout space of existing engines, the intake duct cannot be filtered and protected by conventional methods. At present, during the maintenance of high-pressure engines, the intake port of the engine is mainly manually blocked (using a cloth or a board to block the intake port of the engine during maintenance) to prevent foreign objects from falling in. However, human operation is prone to the situation of forgetting to block or incomplete blocking, and the risk of foreign objects entering cannot be fundamentally avoided. In addition, the inner diameter of the engine intake port is smaller than that of the engine intake duct, and it is very difficult to set a blocking structure at the intake port. Summary of the Invention

[0005] In view of this, the present invention provides a safety core structure for an engine intake duct, which can be arranged at the intake port of the engine, thereby effectively blocking foreign objects, and fundamentally solving the problem of dust and large-particle foreign objects entering the interior of the intake port of the engine.

[0006] The present invention is realized by the following technical solutions:

[0007] A safety core structure for an engine intake duct includes: a breathable base guiding mechanism and a cap telescoping mechanism;

[0008] The cap telescoping mechanism is arranged in the intake duct through the base guiding mechanism;

[0009] The cap telescoping mechanism can be opened and closed. In the closed state, the cap telescoping mechanism enters the intake port and forms a blocking layer inside the intake duct when opened.

[0010] Further, the cap telescoping mechanism includes: a central shaft, a guiding tube B, an umbrella-shaped filter layer and a deployment and retraction structure;

[0011] The guiding tube B is arranged on the base guiding mechanism;

[0012] The central axis is coaxially sleeved inside the guide pipe B and can move along the axial direction of the guide pipe B;

[0013] The central axis is connected to the guide pipe B through an unfolding and folding structure;

[0014] When the central axis moves upward, the umbrella-shaped filter layer folds up; when the central axis moves downward, the umbrella-shaped filter layer unfolds.

[0015] Further, the unfolding and folding structure includes: a plurality of long arms and a plurality of short arms;

[0016] A plurality of the long arms are arranged at equal intervals along the circumferential direction of the top of the central axis; one end of the long arm is hinged to the top of the central axis; the umbrella-shaped filter layer is connected to the top of the long arm of the unfolding and folding structure of the central axis;

[0017] A plurality of the short arms are arranged at equal intervals along the circumferential direction of the top of the guide pipe B; one end of the short arm is hinged to the top of the guide pipe B, and the other end of the short arm is hinged to the body of the corresponding long arm.

[0018] Further, a limiting structure A is provided at the top of the central axis, and one end of the long arm is hinged to the limiting structure A.

[0019] Further, a limiting structure B is provided at the top of the guide pipe B, and one end of the short arm is hinged to the limiting structure B.

[0020] Further, a long arm inner groove along its length direction is provided on the body of the long arm;

[0021] The other end of the short arm is hinged to the long arm inner groove.

[0022] Further, it further includes: a spring and a stop block;

[0023] The stop block is coaxially arranged at the bottom of the central axis;

[0024] The spring is coaxially sleeved on the central axis, and both ends of the spring respectively abut against the bottom end of the guide pipe B and the top end of the stop block.

[0025] Further, the base guiding mechanism includes: a guide pipe A;

[0026] The guide pipe A is arranged on the center line of the base guiding mechanism;

[0027] The guide pipe B is coaxially sleeved inside the guide pipe A.

[0028] Further, the base guiding mechanism includes: a mesh cover with an open bottom end;

[0029] The cap top telescoping mechanism is arranged at the air inlet through the mesh cover.

[0030] Beneficial effects:

[0031] (1) A safety core structure for an engine intake passage according to the present invention includes a ventilable base guiding mechanism and a cap telescopic mechanism, so that the installed safety core structure can ensure the normal operation of the engine without disassembly, fundamentally avoid human errors, prevent the risk of foreign objects entering the engine, and ensure the normal operation of the engine; the cap telescopic mechanism is an umbrella-shaped structure that can be opened and closed, so that the safety core structure can be inserted into the intake port with a diameter narrower than the inner diameter of the intake passage through the closing of the cap telescopic mechanism, and a blocking layer can be formed inside the intake passage through the opening of the cap telescopic mechanism, effectively blocking foreign objects outside the safety core, thereby avoiding damage to the engine caused by foreign objects entering and the huge costs of manpower and material resources for cleaning foreign objects; prevent foreign objects from outside from entering the engine through the intake passage.

[0032] (2) In a safety core structure for an engine intake passage according to the present invention, when the central axis moves upward, the umbrella-shaped filter layer closes; when the central axis moves downward, the umbrella-shaped filter layer opens; the safety core structure can be simply set through the movement of the central axis relative to the guide tube B, and is easy to operate.

[0033] (3) In a safety core structure for an engine intake passage according to the present invention, a long arm inner groove along its length direction is provided on the arm body of the long arm, which can provide space for the movement of the short arm.

[0034] (4) In a safety core structure for an engine intake passage according to the present invention, a spring is coaxially sleeved on the central axis, and the two ends respectively abut against the bottom end of the guide tube B and the top end of the stop block. When the cap telescopic mechanism penetrates into the engine intake port and then releases the central axis, the central axis can move upward under the push of the spring force and form a blocking layer inside the engine intake port; when the umbrella-shaped structure opens, the spring force maintains the open state of the umbrella-shaped structure.

[0035] (5) In a safety core structure for an engine intake passage according to the present invention, the cap telescopic mechanism is arranged at the intake port through a mesh cover, which can further reduce the gas resistance and reduce the influence of the safety core structure on the gas inlet and outlet of the engine intake passage. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 is an exploded view of the safety core device structure of the present invention;

[0037] Figure 2 is an open view of the safety core device structure of the present invention;

[0038] Figure 3 is a closed view of the safety core device structure of the present invention;

[0039] Figure 4 is a schematic view of the base guiding mechanism of the present invention;

[0040] Figure 5 Schematic diagram of the cap top telescopic mechanism of the present invention;

[0041] Figure 6 Schematic diagram of the spring of the present invention;

[0042] Figure 7 Schematic structural diagram of the thrust block of the present invention;

[0043] Figure 8 Schematic structural diagram of the split pin of the present invention;

[0044] Figure 9 Schematic structural diagram of the central shaft of the present invention;

[0045] Figure 10 Front view of the guide tube B of the present invention;

[0046] Figure 11 3D view of the guide tube B of the present invention;

[0047] Figure 12 Schematic structural diagram of the long arm of the present invention;

[0048] Figure 13 Schematic structural diagram of the short arm of the present invention;

[0049] Wherein, 1 - base guiding mechanism, 11 - base, 12 - mesh cover, 13 - guide tube A, 2 - cap top telescopic mechanism, 21 - central shaft, 211 - column body, 212 - long arm limiting circumferential groove, 213 - limiting hole A, 214 - long arm limiting longitudinal groove, 22 - long arm, 221 - long arm hole A, 222 - long arm inner groove, 223 - long arm hole B, 23 - short arm, 231 - short arm hole A, 232 - short arm hole B, 24 - first tightening ring, 25 - second tightening ring, 26 - guide tube B, 261 - inner hole, 262 - short arm limiting circumferential groove, 263 - short arm limiting longitudinal groove, 264 - limiting hole B, 27 - umbrella-shaped filter layer, 3 - spring, 4 - thrust block, 41 - shaft hole, 42 - locking hole, 5 - split pin. Specific embodiments

[0050] The present invention will be described in detail below with reference to the accompanying drawings and by way of examples.

[0051] This embodiment provides an engine intake duct safety core structure for blocking small-particle dust and large-particle foreign objects from entering the engine through the intake duct.

[0052] As an example, the safety core structure is arranged at the engine intake port for blocking small-particle dust and large-particle foreign objects from falling into the engine through the engine intake duct.

[0053] As shown in Figures 1 to 3As shown, the safety core structure includes: a base guiding mechanism 1, a cap top telescopic mechanism 2, a spring 3, a thrust block 4, and several split pins 5.

[0054] As Figure 4 shown, the base guiding mechanism 1 is air-permeable and includes: a base 11, a mesh cover 12, and a guiding tube A13.

[0055] The mesh cover 12 can block the falling of large particle foreign objects (such as standard parts and tools like screws) while ensuring the passage of air flow; the mesh cover 12 is a cylindrical structure with an open bottom end. The top end face and the side wall of the mesh cover 12 are both provided with meshes. A through hole is provided at the center of the top end face of the mesh cover 12. The provision of several meshes on the mesh cover 12 can reduce the air resistance and reduce the influence of the safety core structure on the air intake and outlet of the engine intake port.

[0056] The base 11 is a ring structure and is coaxially arranged at the open end of the mesh cover 12. The base 11 cooperates with the engine intake port to form a limit to prevent the base guiding mechanism 1 from falling. The base guiding mechanism 1 is detachably installed at the engine intake port through the base 11.

[0057] The guiding tube A13 is coaxially arranged in the through hole at the top of the mesh cover 12.

[0058] The cap top telescopic mechanism 2 is an air-permeable umbrella-like structure that can be opened and closed to form a blocking layer. As Figure 5 shown, the cap top telescopic mechanism 2 includes: a central shaft 21, a guiding tube B26, an umbrella-shaped filter layer 27, and a deployment and retraction structure.

[0059] As Figure 5 , Figure 10 and Figure 11 shown, the guiding tube B26 serves as a fixing member and is coaxially sleeved inside the guiding tube A13. A limiting structure B is provided at the top of the guiding tube B26 to form a limit with the top open end of the guiding tube A13. Several short-arm limiting longitudinal grooves 263 are evenly spaced along the circumferential direction on the side wall of the limiting structure B, and a short-arm limiting circumferential groove 262 is provided. The short-arm limiting longitudinal grooves 263 extend to the tube wall of the guiding tube B26. In this embodiment, several limiting holes B264 are provided on the guiding tube B26, and the guiding tube A13 and the guiding tube B26 are fixedly connected by inserting the split pins 5 into the limiting holes 264. There is no relative movement between the guiding tube B26 and the guiding tube A13.

[0060] As Figure 9As shown, the central shaft 21 is coaxially sleeved in the inner hole 261 of the guide tube B26, and the central shaft 21 can move axially along the guide tube B26. A limiting structure A is provided at the top of the central shaft 21 to form a limit with the top open end of the guide tube B26. A number of long-arm limiting longitudinal grooves 214 are evenly spaced along the circumferential direction on the side wall of the limiting structure A, and a long-arm limiting circumferential groove 212 is provided. A radial limiting hole 213 is provided at the bottom of the column body 211 of the central shaft 21.

[0061] The unfolding and folding structure is realized by the movement of the central shaft 21 relative to the guide tube B26. The unfolding and folding structure includes: two tightening rings, a number of long arms 22 and a number of short arms 23 corresponding to the short arms 22 one by one.

[0062] As Figure 5 and Figure 13 shown, one end of the long arm 22 is hinged to the limiting structure A at the top of the central shaft 21 through a tightening ring arranged in the long-arm limiting circumferential groove 212, and this tightening ring is the first tightening ring 24. Specifically, the long arms 22 correspond to the long-arm limiting longitudinal grooves 214 one by one, and one end of the long arm 22 is located in the corresponding long-arm limiting longitudinal groove 214. As Figure 12 shown, a long-arm hole A221 is provided at one end of each long arm 22, and the first tightening ring 24 sequentially passes through the long-arm holes A221 of each long arm 22 to realize the hinging between the limiting structure A of the central shaft 21 and each long arm 22. The long-arm limiting circumferential groove 212 forms a limit on the first tightening ring 24, thereby preventing the long arm 22 from moving during use. A long-arm inner groove 222 is provided along the length direction on the arm body of each long arm 22, and long-arm holes B223 are respectively provided on the two side walls of each long-arm inner groove 222.

[0063] As Figure 5 and Figure 13 shown, one end of the short arm 23 is hinged to the limiting structure B at the top of the guide tube B26 through a tightening ring arranged in the short-arm limiting circumferential groove 262, and this tightening ring is the second tightening ring 25. Specifically, the short arms 23 correspond to the short-arm limiting longitudinal grooves 263 one by one, and one end of the short arm 23 is located in the corresponding short-arm limiting longitudinal groove 263; the other end is hinged to the long arm 22 at the corresponding position. As Figure 13 shown, a short-arm hole 231 is provided at each end of each short arm 23, and the second tightening ring 25 sequentially passes through the short-arm holes 231 at one end of each short arm 23 to realize the hinging between the limiting structure B of the guide tube B26 and the short arm 23. The short-arm limiting circumferential groove 262 forms a limit on the second tightening ring 25, thereby preventing the short arm 23 from moving during use; the short-arm hole 231 at the other end of each short arm 23 is hinged to the long-arm hole B223 of the corresponding long arm 22 through a split pin, and the long-arm inner groove 222 forms a clearance for the rotation of the short arm 23.

[0064] When the top of the central axis 21 is far from the top of the guide tube B26, the angle formed by the short arm 23 and the long arm 22 increases; when the top of the central axis 21 is close to the top of the guide tube B26, the angle formed by the short arm 23 and the long arm 22 decreases.

[0065] The umbrella-shaped filter layer 27 is fixedly connected to the tops of the long arm 22 and the limiting structure A. The umbrella-shaped filter layer 27 is made of air filtration material, which can block small particle foreign matters (such as dust, dust or debris, etc.) while not affecting the ventilation performance of the engine intake duct.

[0066] When the angle formed by the short arm 23 and the long arm 22 of the deployment and retraction structure increases, the umbrella-shaped filter layer 27 is retracted and the cap top telescopic mechanism 2 is in the retracted state; when the angle formed by the short arm 23 and the long arm 22 of the deployment and retraction structure increases, the umbrella-shaped filter layer 27 opens and the cap top telescopic mechanism 2 is in the open state.

[0067] As Figure 7 shown, a shaft hole 41 is provided at the center of the top of the stop block 4, and the stop block 4 is coaxially sleeved on the bottom of the central axis 21 through the shaft hole 41. A lock hole 42 is provided on the side wall of the thrust block 4, and a split pin 5 ( Figure 8 ) is inserted into the lock hole 42 and the limit hole A213 on the central axis 21 at the same time to realize the locking and fixing between the stop block 4 and the central axis 21.

[0068] As Figure 2 and Figure 6 shown, the spring 3 is coaxially sleeved on the column body 211 of the central axis 21 and is located below the guide tube B26. The top end of the spring 3 abuts against the bottom end of the guide tube B26, and the bottom end of the spring 3 abuts against the top end of the stop block 4.

[0069] Working principle:

[0070] In this embodiment, the safety core structure is fixed at the engine intake port through the base 11 of the base guiding mechanism 1. In the cap top telescopic mechanism 2, the guide tube B26 is a fixed part, and the central axis 21 moves up and down along the length direction of the guide tube B26, so as to realize the opening and retraction of the umbrella-shaped filter layer 27. When installing the safety core, move the central axis 21 upward (for example, hold the guide tube B26 with one hand and push the central axis 21 upward with the other hand), the umbrella-shaped filter layer 27 is retracted, the spring 3 is compressed, and the top end of the spring 3 abuts against the bottom end of the guide tube B26; when the safety core enters the engine intake port, release the central axis 21, and the spring 3 is released; at this time, the spring force of the spring 3 pushes the thrust block 4, and the central axis 21 moves downward along with the thrust block 4, the umbrella-shaped filter layer 27 opens, completely covering the V-shaped cylinder of the engine; at the same time, the spring force of the spring 3 makes the umbrella-shaped filter layer 27 maintain the open state.

[0071] After the setting is completed, the engine can be directly maintained. Since the mesh cover of the base guiding mechanism 1 can filter large particulate foreign matters, and the umbrella-shaped filter layer 27 of the cap top telescopic mechanism 2 can filter small particulate foreign matters, large and small particulate foreign matters can be effectively prevented from entering the engine air intake duct. Since both the base guiding mechanism 1 and the cap top telescopic mechanism 2 are ventilable, after maintenance, the safety core does not need to be disassembled, and the normal operation of the engine can still be ensured.

[0072] In summary, the above are only the preferred embodiments of the present invention and are not intended to limit the protection scope of the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A safety core structure for an engine intake duct, characterized in that, Comprising: A ventilable base guiding mechanism (1) and a cap top telescoping mechanism (2); The cap top telescoping mechanism (2) is arranged in the air inlet duct through the base guiding mechanism (1); The cap top telescoping mechanism (2) can be opened and closed. In the closed state, the cap top telescoping mechanism (2) enters the air inlet opening and forms a blocking layer inside the air inlet duct when it is opened.

2. The engine air intake duct safety core structure according to claim 1, characterized in that The cap top telescoping mechanism (2) includes: a central shaft (21), a guiding tube B (26), an umbrella-shaped filter layer (27) and an unfolding and folding structure; The guiding tube B (26) is arranged on the base guiding mechanism (1); The central shaft (21) is coaxially sleeved inside the guiding tube B (26) and can move along the axial direction of the guiding tube B (26); The central shaft (21) is connected to the guiding tube B (26) through the unfolding and folding structure; When the central shaft (21) moves upward, the umbrella-shaped filter layer (27) folds up; when the central shaft (21) moves downward, the umbrella-shaped filter layer (27) opens.

3. The engine air intake duct safety core structure according to claim 2, characterized in that, The unfolding and folding structure includes: a plurality of long arms (22) and a plurality of short arms (23); A plurality of the long arms (22) are evenly spaced along the circumference of the top of the central shaft (21); one end of the long arm (22) is hinged to the top of the central shaft (21); the umbrella-shaped filter layer (27) is connected to the top of the long arm (22) of the unfolding and folding structure of the central shaft (21); A plurality of the short arms (23) are evenly spaced along the circumference of the top of the guiding tube B (26); one end of the short arm (23) is hinged to the top of the guiding tube B (26), and the other end of the short arm (23) is hinged to the body of the corresponding long arm (22).

4. The safety core structure according to claim 3, characterized in that, A limiting structure A is provided at the top of the central shaft (21), and one end of the long arm (22) is hinged to the limiting structure A.

5. The safety core structure according to claim 4, characterized in that, A limiting structure B is provided at the top of the guiding tube B (26), and one end of the short arm (23) is hinged to the limiting structure B.

6. The engine air intake duct safety core structure according to any one of claims 3-5, characterized in that, A long arm inner groove (222) along its length direction is provided on the body of the long arm (22); The other end of the short arm (23) is hinged to the long arm inner groove (222).

7. The engine air intake duct safety core structure according to any one of claims 2-5, characterized in that, Further comprising: A spring (3) and a stop block (4); The stop block (4) is coaxially arranged at the bottom of the central shaft (21); The spring (3) is coaxially sleeved on the central shaft (21), and the two ends of the spring (3) respectively abut against the bottom end of the guiding tube B (26) and the top end of the stop block (4).

8. The engine air intake duct safety core structure according to any one of claims 2-5, characterized in that, The base guiding mechanism (1) includes: a guiding tube A (13); The guiding tube A (13) is arranged on the center line of the base guiding mechanism (1); The guiding tube B (26) is coaxially sleeved inside the guiding tube A (13).

9. The safety core structure of an engine air intake duct according to claim 1, characterized in that, The base guiding mechanism (1) includes: a mesh cover (12) with an open bottom end; The cap top telescoping mechanism (2) is arranged at the air inlet opening through the mesh cover (12).

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