CN113915019B

CN113915019B - Cylinder head, cylinder body structure for engine and engine

Info

Publication number: CN113915019B
Application number: CN202111296111.8A
Authority: CN
Inventors: 林健明; 赵立; 李建统
Original assignee: Jiangmen Dachangjiang Group Co Ltd
Current assignee: Jiangmen Dachangjiang Group Co Ltd
Priority date: 2021-11-03
Filing date: 2021-11-03
Publication date: 2024-07-30
Anticipated expiration: 2041-11-03
Also published as: CN113915019A

Abstract

The invention discloses a cylinder head, a cylinder body structure for an engine and the engine, wherein the cylinder head comprises a cylinder head body, the cylinder head body is provided with a first cavity, the first cavity is used for accommodating a chain, the cylinder head body is also provided with a first installation part and a second installation part, the first installation part is used for fixing a water pump seat, the second installation part is used for fixing the cylinder head and the cylinder body, and the first installation part is positioned at the outer side of the cylinder head relative to the second installation part; the cylinder block structure for the engine comprises the cylinder head; the engine comprises the cylinder block structure for the engine. When the cylinder head and the cylinder body are combined through the second mounting part, the cylinder head and the cylinder body can tightly abut against each other to ensure the surface pressure required by sealing, thereby ensuring the airtight reliability between the cylinder head and the cylinder body, further ensuring the airtight performance of a chain cavity and avoiding the problem of oil leakage caused by poor airtight performance of the chain cavity.

Description

Cylinder head, cylinder body structure for engine and engine

Technical Field

The invention relates to the technical field of engines, in particular to a cylinder head, a cylinder body structure for an engine and the engine.

Background

The engine is classified into an air-cooled engine and a water-cooled engine according to the difference of cooling mediums. The water-cooled engine is an engine using water as a cooling medium, the water pump enables the water to circulate along a waterway of the engine and the radiator, and meanwhile, the water flowing through the radiator is cooled by utilizing windward air flow generated in the running process of the motorcycle or air flow generated by a fan, so that the engine is cooled.

The cylinder block and cylinder head of the engine are combined to form a chain cavity inside. However, since the water pump seat is fixed on the cylinder head, the installation of the water pump seat affects the assembly installation between the cylinder body and the cylinder head, so that the cylinder body and the cylinder head are difficult to be effectively assembled, gaps exist between the cylinder body and the cylinder head, the tightness of the chain cavity is affected, and the leakage of oil in the chain cavity is easily caused.

Disclosure of Invention

Based on this, it is necessary to provide a cylinder head, a block structure for an engine, and an engine; the first installation part of the cylinder head is positioned at the outer side of the second installation part, when the second installation part is used for fixing the cylinder head and the cylinder body in a combined mode, the surface pressure between the cylinder head and the cylinder body cannot be affected by the first installation part, so that the close fit between the cylinder head and the cylinder body is ensured, and the problem of oil leakage caused by gaps in a chain cavity is avoided; the cylinder body structure for the engine comprises the cylinder head, and the first installation part is positioned at the outer side of the second installation part, so that the tightness of the chain cavity is ensured, and the leakage of oil in the chain cavity caused by over-low surface pressure is avoided; the engine comprises the cylinder body structure for the engine, the tightness of the chain cavity is better, and the overall performance of the engine is ensured to be reliable.

The technical scheme is as follows:

An embodiment provides a cylinder head, including the cylinder head body, the cylinder head body has first cavity, first cavity is used for holding the chain, the cylinder head body still is equipped with first installation department and second installation department, first installation department is used for carrying out the fixed of water pump seat, second installation department is used for carrying out the fixed of cylinder head and cylinder body, first installation department is relative second installation department is in the outside of cylinder head.

The cylinder head and the second mounting part are used for carrying out combined fixation of the cylinder head and the cylinder body, when the cylinder head is fixed, the second cavity of the cylinder body is matched with the first cavity of the cylinder head to form a chain cavity, and the water pump seat is fixed on the cylinder head through the first mounting part so as to carry out subsequent water pump mounting; since the first mounting portion is located outside the cylinder head with respect to the second mounting portion, that is: the second installation department is located the inboard of cylinder head relative first installation department, therefore, when carrying out the closing of cylinder head and cylinder body through the second installation department, cylinder head and cylinder body can tightly contradict, guarantee the required face pressure of seal to guarantee airtight reliability between cylinder head and the cylinder body, and then guarantee the seal in chain chamber, avoid the fluid leakage problem that leads to because the seal in chain chamber is poor.

The technical scheme is further described as follows:

In one embodiment, the first cavity extends along a first direction, the cylinder head body is provided with a first combining surface, the first combining surface is used for being matched with the cylinder block, the first combining surface is perpendicular to the first direction, and the first cavity extends to the first combining surface; when the projection is carried out on the first combining surface along the first direction, the projection area of the second installation part is positioned between the projection area of the first installation part and the area where the first cavity is positioned.

In one embodiment, the cylinder head body is provided with a mounting seat for mounting the water pump seat, the first mounting portion comprises a first mounting table, the first mounting table extends from the mounting seat along the first direction and extends towards a side away from the mounting seat, and the first mounting table is provided with a first mounting hole extending along the first direction.

In one embodiment, at least a portion of the mounting seat is located outside the outer wall of the cylinder head body, the outer wall of the first mounting table is connected with the outer wall of the cylinder head body, and the extending end of the first mounting table does not exceed the first combining surface.

In one embodiment, the cylinder head body is further provided with a second mounting table, the second mounting table is used for mounting the water pump, the second mounting table extends along a second direction, and the second direction is perpendicular to the first direction.

In one embodiment, the mounting seat is in a semicircular structure, and the second mounting table extends from the outer wall of the cylinder head body towards the outer side of the cylinder head body and is connected with the outer annular wall of the mounting seat.

In one embodiment, the second mounting tables are at least two, and the at least two second mounting tables are arranged at intervals along the outer ring of the mounting seat;

The extending ends of all the second mounting tables are positioned on the same plane and form a mounting table surface, and the mounting table surface is positioned outside the outer side surface of the mounting seat.

In one embodiment, the first mounting part is provided with at least two mounting parts and is arranged at intervals; the second installation parts are provided with at least two installation parts and are arranged at intervals; the second mounting part is a second mounting hole arranged on the cylinder head body;

When projected on the first combining surface along the first direction, the projection area of the first installation part is positioned between the projection area of the second installation part and the projection area of the installation table top.

Another embodiment provides a block structure for an engine, comprising:

A cylinder head according to any one of the above aspects;

A cylinder block having a second cavity provided in correspondence with the first cavity;

and the cylinder body fixing assembly is used for connecting the cylinder head with the cylinder body, and the first cavity and the second cavity are matched to form a chain cavity.

According to the cylinder body structure for the engine, when the cylinder body fixing assembly is used for fixing the cylinder body and the cylinder head together, the first installation part is located on the outer side of the second installation part, so that the tightness of the chain cavity is ensured, and the condition that oil is leaked from the chain cavity due to low surface pressure is avoided.

Still another embodiment provides an engine including the cylinder block structure for an engine as set forth in the above-described technical scheme.

The engine adopts the cylinder body structure for the engine, the tightness of the chain cavity is better, and the overall performance of the engine is ensured to be reliable.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application.

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the description of the embodiments will be briefly described below, and it is apparent that the drawings in the following description are only some embodiments of the present invention, and other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

Moreover, the figures are not drawn to a 1:1 scale, and the relative sizes of various elements are merely exemplary in the figures, and are not necessarily drawn to true scale.

FIG. 1 is a schematic view of the overall structure of a cylinder head according to an embodiment of the present invention;

FIG. 2 is a top view of the overall construction of the cylinder head of the embodiment of FIG. 1;

FIG. 3 is a bottom view of the overall construction of the cylinder head of the embodiment of FIG. 1;

FIG. 4 is an overall structural elevation of the cylinder head of the embodiment of FIG. 1;

fig. 5 is an exploded view of a block structure for an engine in one embodiment.

The drawings are marked with the following description:

100. A cylinder head; 110. a cylinder head body; 101. a first bonding surface; 111. a first mounting portion; 1111. a first mounting table; 112. a second mounting portion; 1121. a second mounting hole; 113. a first cavity; 114. a mounting base; 115. a second mounting table; 200. a cylinder block; 201. a second bonding surface; 211. a second cavity; 300. a water pump base; 400. a water pump; 500. a first fastener; 600. and a second fastener.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the attached drawings:

In order that the above objects, features and advantages of the invention will be readily understood, a more particular description of the invention will be rendered by reference to the appended drawings. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. The present invention may be embodied in many other forms than described herein and similarly modified by those skilled in the art without departing from the spirit of the invention, whereby the invention is not limited to the specific embodiments disclosed below.

Referring to fig. 1, an embodiment provides a cylinder head 100, including a cylinder head body 110, where the cylinder head body 110 has a first cavity 113, the first cavity 113 is used for accommodating a chain, the cylinder head body 110 is further provided with a first mounting portion 111 and a second mounting portion 112, the first mounting portion 111 is used for fixing a water pump base 300, the second mounting portion 112 is used for fixing the cylinder head 100 and a cylinder block 200, and the first mounting portion 111 is located outside the cylinder head 100 relative to the second mounting portion 112.

As shown in fig. 1 and 5, the second mounting portion 112 is used for performing the combined fixing of the cylinder head 100 and the cylinder block 200, and after the cylinder head 100 is fixed, the second cavity 211 of the cylinder block 200 cooperates with the first cavity 113 of the cylinder head 100 to form a chain cavity, and the water pump mount 300 is fixed to the cylinder head 100 by the first mounting portion 111 for performing the subsequent water pump 400 mounting; since the first mounting portion 111 is located outside the cylinder head 100 with respect to the second mounting portion 112, that is: the second mounting portion 112 is located at the inner side of the cylinder head 100 with respect to the first mounting portion 111, so that when the cylinder head 100 and the cylinder block 200 are combined together through the second mounting portion 112, the cylinder head 100 and the cylinder block 200 can tightly abut against each other to ensure surface pressure required for sealing, thereby ensuring sealing reliability between the cylinder head 100 and the cylinder block 200, further ensuring sealing performance of a chain cavity, and avoiding oil leakage caused by poor sealing performance of the chain cavity.

As shown in fig. 1 to 5, the water pump mount 300 is fixed to the cylinder head 100 by the first fastener 500 in cooperation with the first mounting portion 111, and the water pump 400 is subsequently mounted to the water pump mount 300; the second fastener 600 is engaged with the second mounting portion 112 to achieve the combined fixation between the cylinder head 100 and the cylinder block 200, and after the fixation, the first cavity 113 of the cylinder head 100 is engaged with the second cavity 211 of the cylinder block 200 to form a chain cavity.

In the conventional cylinder structure, the first mounting portion 111 is located inside the combined cylinder head 100 and cylinder block 200 such that the first fastening member 500 is also located inside the cylinder head 100 and cylinder block 200, and the second mounting portion 112 is located outside the cylinder head 100 with respect to the first mounting portion 111 such that the corresponding second fastening member 600 is located outside the cylinder head 100 with respect to the first fastening member 500; meanwhile, since the chain cavity is located inside the cylinder structure, the distance from the second fastener 600 to the chain cavity is greater than the distance from the first fastener 500 to the chain cavity, that is, the second fastener 600 is located farther from the chain cavity than the first fastener 500 and on the outer side of the cylinder head 100. At this time, when the second fastening member 600 is fastened to the cylinder head 100 and the cylinder block 200 by the second mounting portion 112, the second fastening member 600 is far away from the chain cavity, which easily results in insufficient surface pressure in the joint area between the cylinder head 100 and the cylinder block 200 corresponding to the area where the chain cavity is located, so that the area where the chain cavity is located cannot be effectively sealed, and an unknown risk of possible oil leakage is buried for the subsequent normal operation; at the same time, the sealing profile of the chain chamber (which can also be understood as cylinder head 100 and cylinder block 200) is made too long.

In the embodiment shown in fig. 1, the first mounting portion 111 is located at the outer side of the cylinder head body 110 relative to the second mounting portion 112, that is, the second mounting portion 112 is located at the inner side, and the first mounting portion 111 is located at the outer side, in this case, because the second fastening member 600 is located closer to the inner chain cavity, when the cylinder head 100 and the cylinder block 200 are fixed together, sufficient surface pressure can be ensured, so that reliable airtight fit between the cylinder head 100 and the cylinder block 200 can be realized, oil leakage of the chain cavity cannot occur in subsequent operation, and meanwhile, the problem of excessively long sealing profile is solved.

In one embodiment, the thermostat of the water pump system is provided at a water outlet portion of the water pump 400, and the water outlet portion of the water pump 400 is provided at a position of the water pump 400 away from the first mounting portion 111.

In the conventional water pump system, the thermostat is generally provided at the water inlet portion of the water pump 400, and the water inlet portion of the water pump 400 is located approximately at the area where the first mounting portion 111 of the cylinder head 100 is located. By transferring the position of the thermostat away from this area, a space is left in which the first mounting portion 111 can be provided, so that the first mounting portion 111 can be provided toward the outside of the cylinder head body 110 with respect to the second mounting portion 112, thereby achieving a reliable sealing fit of the cylinder head 100 and the cylinder block 200.

In one embodiment, referring to fig. 3 and 4, the first cavity 113 extends along a first direction, the cylinder head body 110 has a first bonding surface 101, the first bonding surface 101 is configured to mate with the cylinder block 200, the first bonding surface 101 is perpendicular to the first direction, and the first cavity 113 extends to the first bonding surface 101.

As shown in fig. 3 to 5, the first cavity 113 is opened in the up-down direction, the first joint surface 101 is the lower side surface of the cylinder head 100, the second cavity 211 is opened in the up-down direction, the second joint surface 201 is the upper side surface of the cylinder block 200, and when the first fastener 500 fixes the cylinder head 100 and the cylinder block 200 together, the first joint surface 101 and the second joint surface 201 cooperate, and the first cavity 113 and the second cavity 211 form a chain cavity correspondingly.

In one embodiment, referring to fig. 3, when the projection is performed on the first combining surface 101 along the first direction, the projection area of the second mounting portion 112 is located between the projection area of the first mounting portion 111 and the area where the first cavity 113 is located.

In the embodiment shown in fig. 3, the first mounting portion 111 is located on the right side of the second mounting portion 112, the first mounting portion 111 is located opposite to the outside of the cylinder head body 110, the second mounting portion 112 is located opposite to the inside of the cylinder head body 110, the first cavity 113 is located on the left side of the second mounting portion 112, and the first cavity 113 is located opposite to the second mounting portion 112 on the inside of the cylinder head body 110. This arrangement ensures surface pressure at the time of joint fixation between the cylinder head 100 and the cylinder block 200, and makes the whole structure more compact.

In one embodiment, referring to fig. 1, the cylinder head body 110 is provided with a mounting seat 114 for mounting the water pump seat 300, the first mounting portion 111 includes a first mounting stage 1111, the first mounting stage 1111 extends from the mounting seat 114 along the first direction and extends toward a side away from the mounting seat 114, and the first mounting stage 1111 is provided with a first mounting hole extending along the first direction.

In the embodiment shown in fig. 1, the cylinder head body 110 is provided with a mounting seat 114, the mounting seat 114 and the first joint surface 101 are located on two opposite sides of the cylinder head body 110, and the first mounting platform 1111 extends from the mounting seat 114 along the first direction towards one side of the first joint surface 101, and the first mounting platform 1111 is provided with a first mounting hole, which may be a screw hole or a non-screw hole.

In one embodiment, referring to fig. 1, at least a portion of the mounting seat 114 is located outside the outer wall of the cylinder head body 110, the outer wall of the first mounting stage 1111 is connected to the outer wall of the cylinder head body 110, and the extending end of the first mounting stage 1111 does not exceed the first bonding surface 101.

In the embodiment shown in fig. 1, a portion of the mounting base 114 protrudes or extends outside of the cylinder head body 110 to provide a foundation for the extension of the first mounting stage 1111, with the first mounting stage 1111 being located outside of the side wall of the cylinder head body 110. In fig. 1, the first mount 1111 is provided substantially integrally with the outer side wall of the cylinder head body 110.

As shown in fig. 1 and 4, the first mounting stage 1111 does not extend beyond the first joint surface 101, so that the mounting space of the first fastener 500 is reserved, the length of the first fastener 500 can be reduced, and the overall material cost can be reduced.

In one embodiment, referring to fig. 1 to 4, the cylinder head body 110 is further provided with a second mounting platform 115, the second mounting platform 115 is used for mounting the water pump 400, and the second mounting platform 115 extends along a second direction, and the second direction is perpendicular to the first direction.

The second mount 115 extends rightward in the second direction from the view point shown in fig. 3, and after the water pump 400 is supported on the cylinder head 100 by the water pump mount 300, the water pump 400 is fixed to the cylinder head 100 by the third fastener and the second mount 115 is engaged.

In one embodiment, referring to fig. 1, the mounting base 114 is disposed in a semicircular structure, and the second mounting base 115 extends from the outer wall of the cylinder head body 110 toward the outer side of the cylinder head body 110 and is connected to the outer annular wall of the mounting base 114.

In the embodiment shown in fig. 1, the mounting base 114 is generally semi-circular in configuration to mate with a circular water pump base 300. The second mounting table 115 extends toward the outside of the cylinder head body 110 along the second direction based on the outer side wall of the cylinder head body 110, and a portion of the second mounting table 115 is substantially integrally provided with the outer ring wall of the mounting seat 114, so that the structure is more compact.

In one embodiment, referring to fig. 1 to 4, at least two second mounting tables 115 are provided, and at least two second mounting tables 115 are disposed at intervals along the outer ring of the mounting base 114.

In the embodiment shown in fig. 1, three second mounting tables 115 are provided, and the three second mounting tables 115 are integrally fixed to the outer circumferential wall of the mounting base 114 at intervals.

In one embodiment, referring to fig. 2 to 4, all the extending ends of the second mounting tables 115 are in the same plane and form a mounting table, and the mounting table is located outside the outer side surface of the mounting base 114.

The mounting table is positioned further to the right of the right side of the mounting base 114 from the perspective shown in fig. 4. The purpose of this arrangement is: the third fastening member for fixing the water pump 400 is ensured to be shortest while making the structure more compact.

In one embodiment, referring to fig. 1, at least two first mounting portions 111 are provided and spaced apart.

In one embodiment, referring to fig. 1, the second mounting portion 112 is provided with at least two mounting portions and is disposed at intervals.

In one embodiment, referring to fig. 1, the second mounting portion 112 is a second mounting hole 1121 formed in the cylinder head body 110.

In the embodiment shown in fig. 1, the first mounting portions 111 are provided in two and spaced apart positions; the second mounting portions 112 are provided with two and are disposed at intervals (it should be noted that, in actual mounting, four second mounting portions 112 are generally disposed as mounting holes of the cylinder head 100 and the cylinder block 200, so as to achieve reliable fitting, which is not described again).

In one embodiment, referring to fig. 4, when the projection is performed on the first joint surface 101 along the first direction, the projection area of the first mounting portion 111 is located between the projection area of the second mounting portion 112 and the projection area of the mounting table.

As shown in fig. 4, the first mounting portion 111 is located at an area between the second mounting portion 112 and the mounting table surface to ensure more compact mounting of the water pump mount 300.

In one embodiment, the first, second, and third fasteners 500, 600 may be configured as screws or bolts.

Referring to fig. 5, another embodiment provides a block structure for an engine, comprising:

The cylinder head 100 as described in any one of the embodiments above;

A cylinder block 200, wherein the cylinder block 200 has a second cavity 211 corresponding to the first cavity 113;

A cylinder block fixing assembly for connecting the cylinder head 100 and the cylinder block 200 together, the first cavity 113 and the second cavity 211 cooperatively forming a chain chamber.

According to the cylinder body structure for the engine, when the cylinder body fixing assembly fixes the cylinder body 200 and the cylinder head 100 together, the first mounting part 111 is positioned on the outer side of the second mounting part 112, so that the tightness of the chain cavity is ensured, and the condition that oil is leaked from the chain cavity due to the fact that the surface pressure is too low is avoided.

It will be appreciated that:

The cylinder fixing assembly includes a second fastener 600, and the second fastener 600 fixes the cylinder head 100 and the cylinder block 200 together through a second mounting hole 1121 to form a chain chamber.

Still another embodiment provides an engine including the block structure for an engine as described in the above embodiment.

The engine can be a water-cooled engine, and the cylinder body structure for the engine is adopted, so that the tightness of a chain cavity is better, and the overall performance reliability of the engine is ensured.

In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings are merely for convenience in describing the present invention and simplifying the description, and do not indicate or imply that the device or element being referred to must have a specific orientation, be configured and operated in a specific orientation, and therefore should not be construed as limiting the present invention.

Furthermore, the terms "first," "second," and the like, are used for descriptive purposes only and are not to be construed as indicating or implying a relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defining "a first" or "a second" may explicitly or implicitly include at least one such feature. In the description of the present invention, the meaning of "plurality" means at least two, for example, two, three, etc., unless specifically defined otherwise.

In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.

In the present invention, unless expressly stated or limited otherwise, a first feature "up" or "down" a second feature may be the first and second features in direct contact, or the first and second features in indirect contact via an intervening medium. Moreover, a first feature being "above," "over" and "on" a second feature may be a first feature being directly above or obliquely above the second feature, or simply indicating that the first feature is level higher than the second feature. The first feature being "under", "below" and "beneath" the second feature may be the first feature being directly under or obliquely below the second feature, or simply indicating that the first feature is less level than the second feature.

It will be understood that when an element is referred to as being "fixed" or "disposed" on another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like are used herein for illustrative purposes only and are not meant to be the only embodiment.

The technical features of the above-described embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above-described embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.

The above examples illustrate only a few embodiments of the invention, which are described in detail and are not to be construed as limiting the scope of the invention. It should be noted that it will be apparent to those skilled in the art that several variations and modifications can be made without departing from the spirit of the invention, which are all within the scope of the invention. Accordingly, the scope of protection of the present invention is to be determined by the appended claims.

Claims

1. The cylinder head is characterized by comprising a cylinder head body, wherein the cylinder head body is provided with a first cavity, the first cavity is used for accommodating a chain, the cylinder head body is further provided with a first installation part and a second installation part, the first installation part is used for fixing a water pump seat, the second installation part is used for fixing the cylinder head and a cylinder body, and the first installation part is positioned at the outer side of the cylinder head relative to the second installation part; the first cavity extends along a first direction, the cylinder head body is provided with a first combining surface, the first combining surface is used for being matched with the cylinder body, the first combining surface is perpendicular to the first direction, and the first cavity extends to the first combining surface; when the first mounting part is projected on the first combining surface along the first direction, the projection area of the second mounting part is positioned between the projection area of the first mounting part and the area where the first cavity is positioned; the cylinder head body is provided with a mounting seat for mounting the water pump seat, the first mounting part comprises a first mounting table, the first mounting table extends from the mounting seat along the first direction and extends towards one side far away from the mounting seat, and the first mounting table is provided with a first mounting hole extending along the first direction; at least one part of the mounting seat is positioned outside the outer wall of the cylinder head body, the outer wall of the first mounting table is connected with the outer wall of the cylinder head body, and the extending end of the first mounting table does not exceed the first joint surface; the cylinder head body is also provided with a second mounting table, the second mounting table is used for mounting the water pump, the second mounting table is arranged in an extending mode along a second direction, the second direction is perpendicular to the first direction, the extending ends of the second mounting table are all located on the same plane and form a mounting table top, and the mounting table top is located outside the outer side face of the mounting seat; the first installation part is provided with at least two installation parts and is arranged at intervals; the second installation parts are provided with at least two installation parts and are arranged at intervals; the second mounting part is a second mounting hole arranged on the cylinder head body; when projected on the first combining surface along the first direction, the projection area of the first installation part is positioned between the projection area of the second installation part and the projection area of the installation table top.

2. The cylinder head of claim 1, wherein the mounting base is provided in a semicircular configuration, and the second mounting base extends from an outer wall of the cylinder head body toward an outer side of the cylinder head body and is connected to an outer annular wall of the mounting base.

3. The cylinder head of claim 2, wherein the second mounting stations are at least two, the at least two second mounting stations being spaced apart along the outer ring of the mounting block.

4. A block structure for an engine, comprising:

A cylinder head according to any one of claims 1 to 3;

5. An engine comprising the block structure for an engine according to claim 4.