Sealing cylinder body structure of mower

Abstract

The utility model discloses a sealing cylinder body structure of a mower, the upper end face of a cylinder body is provided with an annular first sealing groove, the first sealing groove is arranged on the outer side of a piston cavity, the lower end face of a cylinder cover is provided with an annular second sealing groove, and the second sealing groove and the first sealing groove are arranged in a staggered mode. Due to the fact that the first sealing groove and the second sealing groove are arranged, two seals can be added on the basis that the cylinder gasket is sealed, and the situation that due to the fact that a single-cylinder engine works at high temperature and high pressure for a long time, a cylinder gasket material is hardened and loses elasticity is avoided. According to the device, due to the fact that the positioning shaft is arranged, the cylinder cover and the cylinder gasket can be conveniently and rapidly positioned and installed, the installation time is saved, and the installation efficiency is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of engine, specifically a lawn mower sealing cylinder structure. BACKGROUND

[0002] The lawn mower is also called grass trimmer, grass cutter, lawn mower, etc., which is a mechanical tool for trimming lawn, vegetation, etc., and it is composed of a cutter head, an engine, a walking wheel, a walking mechanism, a blade, a handrail and a control part.

[0003] The engine of the lawn mower usually adopts a single-cylinder gasoline engine, and long-time high-temperature and high-pressure work of the single-cylinder engine can cause hardening and loss of elasticity of the cylinder gasket material, and the sealing performance is reduced, and the oil in the piston cavity can seep out from between the cylinder cover and the cylinder body, thereby reducing the service life of the engine and increasing the cost of subsequent maintenance of the engine. SUMMARY

[0004] The utility model solves at least one of the above technical problems by providing a lawn mower sealing cylinder structure.

[0005] The utility model solves the above technical problems by the following technical scheme: a lawn mower sealing cylinder structure, which comprises a cylinder body, a piston cavity is arranged in the middle part of the cylinder body, a plurality of threaded holes are arranged on the upper end face of the cylinder body, a cylinder cover is arranged in corresponding cooperation with the cylinder body, a first bolt hole is arranged on the cylinder cover, a cylinder gasket is arranged in cooperation between the cylinder body and the cylinder cover, a piston cavity hole is arranged on the cylinder gasket in cooperation with the piston cavity, a second bolt hole is arranged on the cylinder gasket in cooperation with the first bolt hole, the cylinder cover is fixed on the cylinder body through bolts, a first sealing groove is arranged on the upper end face of the cylinder body in a ring shape, the first sealing groove is arranged on the outer side of the piston cavity, a second sealing groove is arranged on the lower end face of the cylinder cover in a ring shape, the second sealing groove is arranged on the outer side of the first sealing groove in an interlaced manner, a plurality of positioning shafts are arranged on the cylinder cover, a plurality of first positioning holes are arranged on the cylinder body, the first positioning holes are arranged in corresponding cooperation with the positioning shafts, a second positioning hole is arranged on the cylinder gasket, and the second positioning hole is arranged in corresponding cooperation with the first positioning hole.

[0006] Further, the upper end face of the cylinder body is provided with a first sealing ring with annular protrusion, the first sealing ring is arranged correspondingly with the second sealing groove, the lower end face of the cylinder cover is provided with a second sealing ring with annular protrusion, and the second sealing ring is arranged correspondingly with the first sealing groove.

[0007] Further, the width of the first sealing ring is smaller than the width of the second sealing groove, the height of the first sealing ring protrusion is smaller than the depth of the second sealing groove, the width of the second sealing ring is smaller than the width of the first sealing groove, and the height of the second sealing ring protrusion is smaller than the depth of the first sealing groove.

[0008] Further, the upper part of the cylinder gasket is provided with a third sealing ring with protrusion, the third sealing ring is arranged correspondingly with the second sealing groove, and the lower part of the cylinder gasket is provided with a fourth sealing ring with protrusion, and the fourth sealing ring is arranged correspondingly with the first sealing groove.

[0009] Further, the end of the positioning shaft is provided with a circular truncated cone structure.

[0010] The beneficial effects of the present application are as follows:

[0011] The first sealing groove and the second sealing groove are arranged, two seals are added on the basis of the cylinder gasket sealing, the hardening and loss of elasticity of the cylinder gasket material caused by long-time high-temperature and high-pressure work of the single-cylinder engine are avoided, the sealing performance is improved, the service life of the engine is improved, the cost of subsequent maintenance of the engine is reduced, the positioning shaft is arranged, the cylinder cover and the cylinder gasket can be quickly positioned and installed, the installation time is saved, and the installation efficiency is improved. BRIEF DESCRIPTION OF DRAWINGS

[0012] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments, and it should be understood that the following drawings only show some embodiments of the present application, and should not be regarded as a limitation to the scope, and for those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0013] Fig. 1 It is a schematic diagram of the upper side structure of the present application.

[0014] Fig. 2 It is a schematic diagram of the lower side structure of the present application.

[0015] Fig. 3 It is a schematic diagram of the upper side structure of the cylinder gasket of the present application.

[0016] Fig. 4 It is a schematic diagram of the lower side structure of the cylinder gasket of the present application.

[0017] In the drawings, the components represented by the respective reference numerals are listed as follows:

[0018] Cylinder 1; Piston cavity 11; Threaded hole 12; First positioning hole 13; First sealing groove 14; First sealing ring 15; Cylinder cover 2; Second sealing groove 21; First bolt hole 22; Positioning shaft 23; Second sealing ring 24; Cylinder gasket 3; Piston cavity hole 31; Second bolt hole 32; Second positioning hole 33; Third sealing ring 34; Fourth sealing ring 35. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the embodiments of the present application clearer, the technical scheme in the embodiments of the present application will be described clearly and completely below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments of the present application. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.

[0020] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. All other embodiments obtained by those of ordinary skill in the art based on the embodiments in the present application without creative labor are within the scope of protection of the present application.

[0021] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0022] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, or the orientations or positional relationships commonly placed when the product of the present application is used, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third", etc. are only used for differentiation in description, and cannot be understood as indicating or implying relative importance.

[0023] In addition, the terms "horizontal", "vertical", etc. do not mean that the components must be absolutely horizontal or vertical, but can be slightly inclined. For example, "horizontal" only means that its direction is relatively more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined.

[0024] In the description of the utility model, still need explaining, unless another explicit provision and limitation, term "arrangement", "installation", "link", "connection" should do broad sense understanding, for example, can be fixed connection, also can be detachable connection, or integrally connected, can be mechanical connection, also can be electrical connection, can be direct connection, also can indirectly connect through intermediate medium, can be two element internal communication. For ordinary skilled in the art, can understand the specific meaning of the above terms in the utility model according to specific circumstances.

[0025] Embodiment one: see Figs. 1 to 4 It is the utility model each structure schematic diagram, including cylinder body 1, the middle part of cylinder body 1 is provided with piston cavity 11, the upper end surface of cylinder body 1 is provided with a plurality of thread holes 12, with cylinder body 1 corresponding cooperation is provided with cylinder cover 2, the first bolt hole 22 of cylinder cover 2 is provided, cylinder cover 2 is fixed on cylinder body 1 through bolt, the upper end surface of cylinder body 1 is provided with annular first sealing groove 14, first sealing groove 14 is arranged outside piston cavity 11, first sealing groove 14 is arranged around piston cavity 11, the purpose is to avoid the oil liquid exudation of piston cavity 11, the lower end surface of cylinder cover 2 is provided with annular second sealing groove 21, second sealing groove 21 is staggered with first sealing groove 14, and the staggered arrangement forms S-shaped sealing structure, second sealing groove 21 is relatively arranged outside first sealing groove 14, cylinder cover 2 is provided with a plurality of positioning shafts 23, cylinder body 1 is provided with a plurality of first positioning holes 13, first positioning hole 13 is provided with positioning shaft 23 corresponding cooperation, second positioning hole 33 is provided on cylinder gasket 3, and second positioning hole 33 is provided with first positioning hole 13 corresponding, and positioning shaft 23 is matched with first positioning hole 13, second positioning hole 33, which can realize the quick positioning installation of cylinder gasket 3 and cylinder cover 2.

[0026] Further, the end of the positioning shaft 23 is provided with a circular truncated cone structure, which facilitates the insertion of the positioning shaft 23 into the first positioning hole 13 and the second positioning hole 33, and realizes the quick installation of the cylinder cover 2 and the cylinder gasket 3.

[0027] After the installation of the cylinder cover 2 and the cylinder gasket 3, the cylinder gasket 3 is compressed between the cylinder cover 2 and the cylinder body 1, while the cylinder gasket 3 at the positions of the first sealing groove 14 and the second sealing groove 21 is not compressed and protrudes into the first sealing groove 14 and the second sealing groove 21. The staggered arrangement of the first sealing groove 14 and the second sealing groove 21 forms an S-shaped labyrinth sealing structure, improves the sealing performance, prevents oil leakage, and prolongs the service life of the engine.

[0028] In the embodiment two, the upper end surface of the cylinder body 1 is provided with a first sealing ring 15 with annular protrusion, the first sealing ring 15 is arranged correspondingly with the second sealing groove 21, the lower end surface of the cylinder cover 2 is provided with a second sealing ring 24 with annular protrusion, the second sealing ring 24 is arranged correspondingly with the first sealing groove 14, the first sealing ring 15 and the second sealing ring 24 cooperate to extrude the cylinder gasket 3, and an S-shaped sealing structure is formed.

[0029] Further, the width of the first sealing ring 15 is smaller than the width of the second sealing groove 21, the protrusion height of the first sealing ring 15 is smaller than the depth of the second sealing groove 21, the width of the second sealing ring 24 is smaller than the width of the first sealing groove 14, and the protrusion height of the second sealing ring 24 is smaller than the depth of the first sealing groove 14. The width and height of the first sealing ring 15 and the second sealing ring 24 are both half of the width and height of the first sealing groove 14 and the second sealing groove 21, so that the extrusion of the cylinder gasket 3 by the first sealing ring 15 and the second sealing ring 24 can avoid the protrusion of the extrusion position of the cylinder gasket 3, and further avoid the poor sealing of other parts of the cylinder gasket 3.

[0030] After the installation of the cylinder cover 2 and the cylinder gasket 3, the cylinder gasket 3 is compressed between the cylinder cover 2 and the cylinder body 1, and the cylinder gasket 3 at the positions of the first sealing ring 15 and the second sealing ring 24 is extruded by the first sealing ring 15 and the second sealing ring 24 and protrudes into the first sealing groove 14 and the second sealing groove 21, and the staggered arrangement of the first sealing groove 14 and the second sealing groove 21 forms an S-shaped labyrinth sealing structure, so that the sealing performance is improved, the oil leakage is avoided, and the service life of the engine is prolonged.

[0031] In the embodiment three, the upper part of the cylinder gasket 3 is provided with a third sealing ring 34 with protrusion, the third sealing ring 34 is arranged correspondingly with the second sealing groove 21, the lower part of the cylinder gasket 3 is provided with a fourth sealing ring 35 with protrusion, the fourth sealing ring 35 is arranged correspondingly with the first sealing groove 14, and after the installation of the cylinder cover 2 and the cylinder gasket 3, the third sealing ring 34 and the fourth sealing ring 35 fill the first sealing groove 14 and the second sealing groove 21, so that an S-shaped labyrinth sealing structure is formed, the sealing performance is improved, the oil leakage is avoided, and the service life of the engine is prolonged.

[0032] The above is only optional embodiments of the present application, and is not used to limit the present application. For those skilled in the art, the present application can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

[0033] In addition, it should be noted that various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction, and in order to avoid unnecessary repetition, the present application will not describe various possible combinations again.

Claims

1. A sealed cylinder structure for a lawnmower, comprising a cylinder body (1), wherein a piston chamber (11) is provided in the middle of the cylinder body (1), and a plurality of threaded holes (12) are provided on the upper end face of the cylinder body (1). A cylinder cover (2) is provided correspondingly to the cylinder body (1), and a first bolt hole (22) is provided on the cylinder cover (2). A cylinder gasket (3) is provided between the cylinder body (1) and the cylinder cover (2), and a piston chamber hole (31) is provided on the cylinder gasket (3) to cooperate with the piston chamber (11). A second bolt hole (32) is provided on the cylinder gasket (3) to cooperate with the first bolt hole (22). The cylinder cover (2) is fixed to the cylinder body (1) by bolts, characterized in that: The upper end face of the cylinder body (1) is provided with an annular first sealing groove (14), which is located on the outside of the piston chamber (11). The lower end face of the cylinder head (2) is provided with an annular second sealing groove (21), which is staggered with the first sealing groove (14). The second sealing groove (21) is located opposite to the outside of the first sealing groove (14). The cylinder head (2) is provided with a plurality of positioning shafts (23). The cylinder body (1) is provided with a plurality of first positioning holes (13), which are correspondingly fitted with the positioning shafts (23). The cylinder gasket (3) is provided with a second positioning hole (33), which is correspondingly fitted with the first positioning hole (13).

2. The sealing cylinder structure for a lawnmower according to claim 1, characterized in that: The upper end face of the cylinder body (1) is provided with a first sealing ring (15) with an annular protrusion, and the first sealing ring (15) is correspondingly provided with a second sealing groove (21). The lower end face of the cylinder cover (2) is provided with a second sealing ring (24) with an annular protrusion, and the second sealing ring (24) is correspondingly provided with a first sealing groove (14).

3. The sealing cylinder structure for a lawnmower according to claim 2, characterized in that: The width of the first sealing ring (15) is less than the width of the second sealing groove (21), the height of the protrusion of the first sealing ring (15) is less than the depth of the second sealing groove (21), the width of the second sealing ring (24) is less than the width of the first sealing groove (14), and the height of the protrusion of the second sealing ring (24) is less than the depth of the first sealing groove (14).

4. The sealing cylinder structure for a lawnmower according to claim 1, characterized in that: The cylinder head gasket (3) has a protruding third sealing ring (34) on its upper part, which is configured to cooperate with the second sealing groove (21). The cylinder head gasket (3) has a protruding fourth sealing ring (35) on its lower part, which is configured to cooperate with the first sealing groove (14).

5. The sealing cylinder structure for a lawnmower according to claim 1, characterized in that: The end of the positioning shaft (23) is provided with a frustum-shaped structure.

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