Crankcase valve structure and air compressor

Abstract

This invention relates to the field of crankcase technology, providing a crankcase valve structure and an air compressor. The crankcase valve structure includes an intake valve and a valve seat plate sequentially mounted on the end face of the crankcase, wherein: the valve seat plate is provided with at least one set of intake holes; the intake valve is provided with at least one valve plate, the valve plate having a root at both ends and an ear between the two ends, the valve plate being connected to the valve body of the intake valve through the root; the end face of the crankcase is provided with a clearance groove and a receiving groove communicating with the gas passage of the crankcase; in the non-intake state, the valve plate covers the corresponding set of intake holes; in the intake state, the ear abuts against the corresponding receiving groove, and the root bends towards the corresponding clearance groove. This invention, through the cooperation of the valve plate with the intake holes, and the cooperation of the valve plate with the clearance groove and the receiving groove, enables robust intake control, improving the reliability of the crankcase valve structure and the air compressor.

Description

Technical Field

[0001] This invention relates to the field of crankcase technology, and more specifically, to crankcase valve structure and air compressor. Background Technology

[0002] In existing crankcase intake structures, the intake valve is typically formed into an elongated strip. One end of the intake valve is connected to the valve body, and the other end is a free end. During intake, the intake valve deforms under the action of gas, allowing gas to pass through and thus achieving intake.

[0003] The existing crankcase intake structure has the following problems found during testing: During the intake process, the intake valve plate deforms, causing it to bear large stress at its connection end, which can lead to breakage in severe cases; in addition, during the intake process, the free end of the intake valve plate rubs against the end face of the crankcase, causing wear.

[0004] Therefore, how to achieve robust intake control and improve the reliability of the crankcase intake structure is an urgent problem to be solved.

[0005] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of the present invention, and therefore may include information that does not constitute prior art known to those skilled in the art. Summary of the Invention

[0006] In view of this, the present invention provides a crankcase valve structure and an air compressor that can achieve robust intake control and improve the reliability of the crankcase valve structure and the air compressor.

[0007] One aspect of the present invention provides a crankcase valve structure, comprising an intake valve and a valve seat plate sequentially mounted on the end face of the crankcase, wherein: the valve seat plate is provided with at least one set of intake holes; the intake valve is provided with at least one valve plate, the valve plate having a root at both ends and an ear between the two ends, the valve plate being connected to the valve body of the intake valve through the root; the end face of the crankcase is provided with a clearance groove and a receiving groove communicating with a gas passage of the crankcase; in the non-intake state, the valve plate covers the corresponding set of intake holes; in the intake state, the ear abuts against the corresponding receiving groove, and the root bends toward the corresponding clearance groove.

[0008] In some embodiments, the bottom wall of the receiving groove is inclined such that the depth of the receiving groove increases from the middle of the receiving groove toward the edge of the receiving groove near the clearance groove.

[0009] In some embodiments, the depth of the receiving groove at its edge is greater than the thickness of the ear portion.

[0010] In some embodiments, the bottom wall of the clearance groove is inclined, such that the groove depth of the clearance groove increases from the middle of the clearance groove toward the edge of the clearance groove near the receiving groove.

[0011] In some embodiments, the slope of the bottom wall of the clearance groove is determined based on the maximum curvature of the root.

[0012] In some embodiments, the width of the end of the root that is connected to the valve body is greater than the width of the end of the root that is connected to the valve plate.

[0013] In some embodiments, the two ends of the valve plate are symmetrical about the center of the valve plate.

[0014] In some embodiments, the valve seat plate is provided with multiple sets of air inlets; the air intake valve is provided with multiple valve plates, wherein the roots of two adjacent valve plates are connected by a connecting bridge, and each connecting bridge cooperates with a clearance groove; in the air intake state, the connecting bridge bends toward the corresponding clearance groove.

[0015] In some embodiments, the plurality of the air inlets are symmetrical about the center of the gas channel.

[0016] In some embodiments, each group of air inlets includes a plurality of circular holes, wherein some adjacent circular holes are connected.

[0017] In some embodiments, the valve seat plate is further provided with an exhaust hole, and the intake valve is further provided with a hollow portion corresponding to the position of the exhaust hole.

[0018] Another aspect of the present invention provides an air compressor configured with a crankcase valve structure as described in any of the above embodiments.

[0019] The beneficial effects of this invention compared to the prior art include at least the following:

[0020] The crankcase valve structure of the present invention provides a robust structure for the valve plate by means of the roots located at both ends. During the intake state, the roots at both ends share the force, preventing breakage. Furthermore, the roots cooperate with the relief groove, which both provides space for deformation of the roots and limits the maximum amount of deformation, further ensuring the stability of the roots. In addition, the lugs of the valve plate cooperate with the receiving groove, which accommodates and supports the lugs during the intake process, allowing the lugs to rest against the receiving groove and preventing wear.

[0021] Thus, the crankcase valve structure of the present invention can achieve robust intake control and improve the reliability of the crankcase valve structure and the air compressor.

[0022] It should be understood that the above general description and the following detailed description are exemplary and explanatory only, and are not intended to limit the invention. Attached Figure Description

[0023] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention. It is obvious that the drawings described below are merely some embodiments of the invention, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0024] Figure 1 This diagram shows an exploded view of the crankcase valve structure in an embodiment of the present invention.

[0025] Figure 2 A top view of the valve seat plate in an embodiment of the present invention is shown;

[0026] Figure 3 A top view of the intake valve in an embodiment of the present invention is shown;

[0027] Figure 4 A top view of the crankcase structure in an embodiment of the present invention is shown;

[0028] Figure 5 This diagram illustrates the mating structure between the intake valve and the valve seat plate in an embodiment of the present invention.

[0029] Figure 6 This diagram illustrates the connection structure between the intake valve and the crankcase in an embodiment of the present invention.

[0030] Figure 7 Show along Figure 4 A schematic diagram of the cross-sectional structure along the AA section;

[0031] Figure 8 Show Figure 7 A magnified structural diagram of region A' in the middle;

[0032] Figure 9 Show along Figure 4 A schematic diagram of the cross-sectional structure of the BB section;

[0033] Figure 10 Show Figure 9 A magnified structural diagram of region B' in the middle. Detailed Implementation

[0034] Exemplary embodiments will now be described more fully with reference to the accompanying drawings. However, these exemplary embodiments can be implemented in many forms and should not be construed as limited to the embodiments set forth herein. Rather, these embodiments are provided to fully and completely convey the concept of the exemplary embodiments to those skilled in the art.

[0035] The accompanying drawings are merely illustrative of the invention and are not necessarily drawn to scale. The same reference numerals in the drawings denote the same or similar parts, and therefore repeated descriptions of them will be omitted. In the description of the invention, terms such as "up," "down," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention.

[0036] It should be noted that, unless otherwise specified, the embodiments of the present invention and the features in different embodiments can be combined with each other.

[0037] Figure 1 The exploded structure of the crankcase valve structure is shown. Figure 2 The top view of the valve seat plate is shown. Figure 3 The top view of the intake valve is shown. Figure 4 The top view of the crankcase is shown. Figure 5 The diagram shows the mating structure between the intake valve and the valve seat plate. Figure 6 This illustrates the mating structure between the intake valve and the crankcase; combined with Figures 1 to 6 As shown, the crankcase valve structure provided in this embodiment of the invention includes:

[0038] An intake valve 20 and a valve seat plate 30 are sequentially installed on the crankcase end face 11; wherein, the valve seat plate 30 is provided with at least one set of intake holes 33; the intake valve 20 is provided with at least one valve plate 22, the valve plate 22 having a root portion 222 located at both ends and an ear portion 224 located between the two ends, the valve plate 22 being connected to the valve body of the intake valve 20 through the root portion 222; the crankcase end face 11 is provided with a clearance groove 14 and a receiving groove 15 communicating with the gas passage 12 of the crankcase 10;

[0039] In the non-intake state, valve plate 22 covers the corresponding group of intake holes 33 (see reference). Figure 5 In the intake state, the ear portion 224 rests against the corresponding receiving groove 15, and the base 222 bends towards the corresponding clearance groove 14 (see reference). Figure 6 ).

[0040] In the non-intake state, valve plate 22 seals and covers the intake port 33. In the intake state, under the action of gas pressure, valve plate 22 moves away from the intake port 33 and bends as a whole towards the gas passage 12 of the crankcase 10, creating a gas flow passage between valve plate 22 and intake port 33. At this time, the root 222 has the greatest degree of bending and bears greater stress. Through the design of the root 222 at both ends of valve plate 22, valve plate 22 has a strong structure, so that the root 222 at both ends of valve plate 22 bears the force together when the valve plate 22 deforms, avoiding breakage. The root 222 also cooperates with the relief groove 14. The relief groove 14 not only provides space for the bending deformation of the root 222, but also limits the maximum deformation of the root 222, further ensuring the robustness of the root 222. In addition, the ear 224 of the valve plate 22 is engaged with the receiving groove 15. The receiving groove 15 accommodates and supports the ear 224 during the air intake process, so that the ear 224 is close to the receiving groove 15 to support the valve plate 22, and the ear 224 is protected from wear.

[0041] Thus, the crankcase valve structure of the present invention can achieve robust intake control and improve the reliability of the crankcase valve structure.

[0042] Figure 7 Show along Figure 4 The cross-sectional structure of the AA section. Figure 8 Show Figure 7 The magnified structure of region A' in the middle; combined with Figure 3 , Figure 4 , Figure 7 and Figure 8 As shown, in some embodiments, the bottom wall 150 of the receiving groove 15 is inclined, so that the groove depth of the receiving groove 15 increases from the middle 15a of the receiving groove 15 towards the edge 15b of the receiving groove 15 near the clearance groove 14. In this way, in the air intake state, on the one hand, the main body of the ear 224 of the valve plate 22 quickly contacts the bottom wall 150 of the receiving groove 15 to provide support, and on the other hand, the side wall of the edge 15b of the receiving groove 15 blocks the side wall 224b of the ear 224 near the root 222 to prevent the ear 224 from slipping off.

[0043] In some embodiments, the groove depth S1 of the edge portion 15b of the receiving groove 15 is greater than the thickness of the ear portion 224. This ensures that the edge portion 15b of the receiving groove 15 is deep enough to accommodate and block the sidewall 224b of the ear portion 224.

[0044] The outline of the receiving groove 15 can be slightly larger than the outline of the ear 224 to accommodate the deformation tendency of the valve plate 22 to expand slightly outward under the action of gas pressure during the intake state. Combined with the inclined design of the bottom wall 150 of the receiving groove 15, the bottom wall of the ear 224 is attached to the bottom wall 150 of the receiving groove 15 during the intake state, and the side wall 224b of the ear 224 is attached to the side wall of the edge portion 15b of the receiving groove 15. Thus, the valve plate 22 remains stable as a whole to achieve robust intake control.

[0045] Figure 9 Show along Figure 4 The cross-sectional structure of the BB section. Figure 10 Show Figure 9 The magnified structure of region B' in the middle; combined with Figure 3 , Figure 4 , Figure 9 and Figure 10 As shown, in some embodiments, the bottom wall 140 of the clearance groove 14 is inclined, so that the groove depth of the clearance groove 14 increases from the middle 14a of the clearance groove 14 to the edge 14b near the receiving groove 15. In this way, in the intake state, on the one hand, the main body of the root 222 of the valve plate 22 quickly contacts the bottom wall 150 of the clearance groove 14 to provide support, and on the other hand, it can adapt to the deformation tendency of the valve plate 22 under the action of gas pressure in the intake state. The inclined design of the bottom wall 140 of the clearance groove 14 provides sufficient space for the bending and outward expansion (i.e., slight torsion) deformation of the root 222.

[0046] In some embodiments, the slope of the bottom wall 140 of the clearance groove 14 is determined based on the maximum curvature of the root 222. In this way, the clearance groove 14 can limit the maximum deformation of the root 222, prevent the root 222 from breaking, and ensure the robustness of the root 222.

[0047] The outline of the clearance groove 14 can be slightly larger than the outline of the root 222 to accommodate the deformation tendency of the valve plate 22 to expand slightly outward under the action of gas pressure in the intake state. Combined with the inclined design of the bottom wall 140 of the clearance groove 14, the bottom wall of the root 222 can abut against the bottom wall 140 of the clearance groove 14 in the intake state, and the side wall 222b of the root 222 near the ear 224 can abut against the side wall of the edge portion 14b of the clearance groove 14 to avoid excessive deformation of the root 222 and ensure the stability of the root 222.

[0048] Continue to combine Figures 1 to 6As shown, in some embodiments, the width of the end of the root 222 connected to the valve body of the intake valve 20 is greater than the width of the end of the root 222 connected to the valve plate 22. When the root 222 deforms, the end connected to the valve body of the intake valve 20 bears the greatest stress. Through the design of the gradually changing width of the root 222, the end of the root 222 connected to the valve body of the intake valve 20 can withstand greater stress, thereby ensuring the robustness of the root 222 in the intake state and preventing the root 222 from breaking.

[0049] In some embodiments, the two ends of the valve plate 22 are symmetrical about the center of the valve plate 22. The valve plate 22 as a whole can be formed into a symmetrical structure so that the roots 222 at both ends are evenly stressed when the valve plate 22 deforms in the intake state, thus avoiding breakage.

[0050] In some embodiments, the valve seat plate 30 is provided with multiple sets of air inlets 33 (for example, the valve seat plate 30 may be provided with two sets of air inlets 33); the intake valve 20 is provided with multiple valve plates 22 (for example, the intake valve 20 may be provided with two valve plates 22), wherein the roots 222 of two adjacent valve plates 22 are connected by a connecting bridge 226, and each connecting bridge 226 cooperates with a relief groove 14; in the intake state, the connecting bridge 226 bends toward the corresponding relief groove 14.

[0051] By connecting the roots 222 of two adjacent valve plates 22 to the valve body of the intake valve 20 via the connecting bridge 226, the structure of the valve plate 22 can be enhanced. Each connecting bridge 226 cooperates with a relief groove 14, which supports and limits the bending deformation of the connecting bridge 226, thereby enhancing the robustness of the connecting bridge 226.

[0052] Furthermore, existing crankcase intake structures typically feature a single set of intake holes, resulting in significant intake pressure. This can easily lead to wear and breakage of the intake valve plates and generate noise. This embodiment, through a design with multiple sets of intake holes 33 and multiple valve plates 22, reduces the intake pressure borne by each valve plate 22, lowers intake noise, improves intake efficiency, and enhances the reliability of the crankcase valve structure.

[0053] In some embodiments, the multiple sets of air inlets 33 are symmetrical about the center of the gas channel 12. This ensures uniform air intake throughout the gas channel 12.

[0054] In some embodiments, each group of air inlets 33 includes a plurality of circular holes, wherein some adjacent circular holes are connected. For example, see reference... Figure 2The set of air inlets 33 shown on the left includes a circular air inlet 33a and two peanut-shaped air inlets 33b, each of which is formed by connecting two circular air inlets 33a. Connecting some (not all) adjacent circular holes increases the intake area and air volume, improving intake efficiency, while also preventing excessively large intake channels from causing noise and ensuring stable airflow.

[0055] In some embodiments, each set of air inlets 33 is symmetrical about the central circular hole. This ensures that each valve plate 22 is subjected to uniform gas pressure at both ends, guaranteeing the robustness of the valve plate 22.

[0056] In some embodiments, at least one air intake chamber 330 is provided on the side of the valve seat plate 30 opposite to the air intake valve 20, and each air intake chamber 330 is connected to a set of air intake holes 33. Through the air intake chambers 330, the valve seat plate 30 can be easily connected to other components to form a sealed and stable air intake channel.

[0057] In some embodiments, the valve seat plate 30 is further provided with an exhaust port 36, and the intake valve 20 is further provided with a hollow portion 26 corresponding to the position of the exhaust port 36. This enables crankcase exhaust. An exhaust chamber 360 communicating with the exhaust port 36 is also provided on the side of the valve seat plate 30 opposite to the intake valve 20. Through the exhaust chamber 360, the valve seat plate 30 can be easily connected to other components to form an exhaust passage.

[0058] This invention also provides an air compressor configured with a crankcase valve structure as described in any of the above embodiments. The air compressor can be used in commercial vehicles or other suitable products. Through the configured crankcase valve structure, the air compressor achieves robust intake control and features low intake noise, high intake efficiency, and high reliability.

[0059] In summary, the crankcase valve structure and air compressor provided by the present invention, through the root portions 222 at both ends of the valve plate 22, give the valve plate 22 a robust structure. During the intake state, the root portions 222 at both ends share the force, preventing breakage. Furthermore, the root portions 222 cooperate with the relief groove 14, which both provides space for the deformation of the root portions 222 and limits the maximum deformation of the root portions 222, further ensuring the robustness of the root portions 222. In addition, the ear portion 224 of the valve plate 22 cooperates with the receiving groove 15. During the intake process, the receiving groove 15 accommodates and supports the ear portion 224, allowing the ear portion 224 to abut against the receiving groove 15 and preventing wear.

[0060] Thus, the crankcase valve structure and air compressor provided by the present invention can achieve robust intake control and improve the reliability of the crankcase valve structure and air compressor.

[0061] The crankcase valve structure and air compressor provided by the present invention can also reduce the intake pressure borne by each valve plate 22, reduce intake noise, and improve intake efficiency by using multiple sets of intake holes 33 in conjunction with multiple valve plates 22, thereby improving the reliability of the crankcase valve structure and air compressor.

[0062] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A crankcase valve structure, comprising an intake valve and a valve seat plate sequentially mounted on the end face of the crankcase, characterized in that: The valve seat plate is provided with at least one set of air inlets; The intake valve is provided with at least one valve plate, the valve plate having roots at both ends and ears between the two ends, the valve plate being connected to the valve body of the intake valve through the roots; The crankcase end face is provided with a clearance groove and a receiving groove that connect the gas passage of the crankcase, wherein the bottom wall of the receiving groove is inclined, so that the depth of the receiving groove increases from the middle of the receiving groove to the edge of the receiving groove near the clearance groove. In the non-intake state, the valve plate covers the corresponding group of intake holes; In the intake state, the main body of the ear rests against the bottom wall of the corresponding receiving groove, and the side wall of the edge of the receiving groove blocks the side wall of the ear near the root; the root bends toward the corresponding clearance groove, and the clearance groove provides space for the bending deformation of the root and limits the maximum deformation of the root.

2. The crankcase valve structure as described in claim 1, characterized in that, The depth of the groove at the edge of the receiving groove is greater than the thickness of the ear.

3. The crankcase valve structure as described in claim 1, characterized in that, The bottom wall of the clearance groove is inclined, so that the depth of the clearance groove increases from the middle of the clearance groove toward the edge of the clearance groove near the receiving groove.

4. The crankcase valve structure as described in claim 3, characterized in that, The slope of the bottom wall of the clearance groove is determined based on the maximum curvature of the root.

5. The crankcase valve structure as described in claim 1, characterized in that, The width of the end of the root that connects to the valve body is greater than the width of the end of the root that connects to the valve plate.

6. The crankcase valve structure as described in claim 1, characterized in that, The two ends of the valve plate are symmetrical about the center of the valve plate.

7. The crankcase valve structure as described in claim 1, characterized in that, The valve seat plate is provided with multiple sets of air inlets; The intake valve is provided with multiple valve plates, wherein the roots of two adjacent valve plates are connected by a connecting bridge, and each connecting bridge cooperates with a clearance groove; In the intake state, the connecting bridge bends toward the corresponding clearance groove.

8. The crankcase valve structure as described in claim 7, characterized in that, The multiple sets of air inlets are symmetrical about the center of the gas channel.

9. The crankcase valve structure as described in claim 1, characterized in that, Each group of air intakes includes multiple circular holes, wherein some adjacent circular holes are connected.

10. The crankcase valve structure as described in claim 1, characterized in that, The valve seat plate is also provided with an exhaust hole, and the air intake valve is also provided with a hollow part corresponding to the position of the exhaust hole.

11. An air compressor, characterized in that, The air compressor is equipped with a crankcase valve structure as described in any one of claims 1-10.

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