Engine cylinder block and engine

Abstract

The utility model provides an engine cylinder body and engine, the engine cylinder body comprises: two sub-cylinder bodies that are arranged in sequence along a first direction and are fixedly connected, the top ends of the two sub-cylinder bodies together form the top end of the engine cylinder body, so that one part of a cylinder hole is formed in one of the sub-cylinder bodies, and the other part is formed in the other sub-cylinder body; therefore, when the two sub-cylinder bodies are fixedly connected, the air cylinder penetrates through an air cylinder hole in the top end of the engine cylinder body jointly formed by the top ends of the two sub-cylinder bodies. The first direction is the length direction or the width direction of the engine cylinder body, each branch cylinder body is of an integrated structure in the vertical direction, so that the engine cylinder body can bear large loads in the vertical direction, and the two branch cylinder bodies can be connected through common bolts or other connecting pieces. The bearing requirement for the connecting piece can be lowered, and meanwhile the total weight and the whole machine manufacturing cost of the engine comprising the engine cylinder block can be reduced.

Description

Technical Field

[0001] This utility model belongs to the field of engine technology, and specifically relates to an engine cylinder block and an engine. Background Technology

[0002] The engine block is the main body of the engine. It connects the cylinders and crankcase into one unit and serves as the supporting frame for mounting cylinders, pistons, crankshafts, and other parts and accessories. As a power output source, the engine generates strong vibrations and friction during operation, so the engine block needs to withstand a large load.

[0003] Most existing engine cylinder blocks adopt horizontal or gantry-type structures. In the horizontal cylinder block structure, the bottom surface of the cylinder block is basically flush with the crankshaft axis. In the gantry-type cylinder block structure, the main bearing housing is independent of the cylinder block, and the bottom surface of the cylinder block is lower than the crankshaft axis. In the above-mentioned engine cylinder block structures, the bottom surface of the cylinder block also needs to be connected to the skirt or other structural components. However, due to the heavy weight of the crankshaft, skirt, or other structural components, they are subjected to vertical downward gravity and vibration caused by the reciprocating motion of the piston. The skirt or other structural components need to withstand a large vertical load. Therefore, the skirt or other structural components need to be fixed to the bottom surface of the cylinder block by high-strength bolts running vertically through it. When the vertical load is large, there is an unstable connection between the bottom surface of the cylinder block and the skirt or other structural components. Moreover, the use of high-strength bolts requires a high load-bearing capacity, which increases manufacturing costs. Utility Model Content

[0004] The purpose of this invention is to solve the problem in the prior art where the bottom surface of the engine block needs to be fixed to the skirt or other structural components by high-strength bolts running vertically through it. When the vertical load is large, the connection between the bottom surface of the cylinder block and the skirt or other structural components is unstable. Furthermore, the use of high-strength bolts requires a high load-bearing capacity, which increases manufacturing costs.

[0005] To solve the above-mentioned technical problems, the present invention discloses an engine cylinder block. The engine cylinder block has a chamber inside, a cylinder bore at the top, and bearing holes on two opposite side walls on the outer periphery of the engine cylinder block, through which a crankshaft passes in sequence. The engine cylinder block includes two sub-cylinder blocks arranged sequentially and fixedly connected along a first direction, the two sub-cylinder blocks together forming a chamber; wherein the tops of the two sub-cylinder blocks together constitute the top of the engine cylinder block, such that a portion of the cylinder bore is formed in one sub-cylinder block and the other portion is formed in the other sub-cylinder block.

[0006] Using the above technical solution, the internal chamber of the engine cylinder block, in addition to housing the cylinder, can also house other structural components. The cylinder is easily housed within the internal chamber via the cylinder bore at the top of the engine cylinder block. During engine operation, the cylinder drives the piston to reciprocate vertically within the chamber. The crankshaft passes sequentially through bearing holes on two opposite side walls of the engine cylinder block's outer periphery and through the internal chamber of the engine cylinder block. The bearing holes on the two side walls provide support for the crankshaft.

[0007] By configuring the engine block as two sub-cylinders arranged sequentially and fixedly along a first direction, which is either the length or width direction of the engine block (i.e., the vertical direction perpendicular to the engine block), the two sub-cylinders together form a chamber. In other words, each sub-cylinder is a single unit in the vertical direction, and the two sub-cylinders are fixedly connected along the length or width direction of the engine block. Therefore, the engine block does not have a separate connection structure in its vertical direction, and there is no need to use high-strength bolts to fix the bottom surface of the cylinder block to the skirt or other structural components in the vertical direction. This allows the engine block to withstand a larger load in the vertical direction. Furthermore, this structure does not require high-strength bolts; ordinary bolts or other connectors can be used, reducing the load-bearing requirements of the connectors and reducing manufacturing costs. The tops of the two sub-cylinders together form the top of the engine block, so that part of the cylinder bore is formed in one sub-cylinder and the other in the other. Thus, when the two sub-cylinders are fixedly connected, the cylinder passes through the cylinder bore formed by the tops of the two sub-cylinders at the top of the engine block.

[0008] In the engine operating scenario, the cylinders of the engine block disclosed in the above embodiments are housed in the chamber through the cylinder bore and drive the piston to reciprocate vertically within the chamber. This process generates significant vibrations, so the two sub-cylinder blocks need to withstand a large load in the vertical direction. Each sub-cylinder block has an integrated structure in the vertical direction, which has a better load-bearing capacity than the existing technology where the bottom of the engine block is connected to a skirt or other structural components in the vertical direction to form a complete engine block structure. It also avoids the risk of vertical separation due to piston vibration.

[0009] According to another specific embodiment of the present invention, the engine cylinder block disclosed in the embodiment of the present invention has two side walls that are arranged opposite to each other in a first direction, which are respectively formed as two side walls with bearing holes in the engine cylinder block, and the opening direction of the bearing holes is parallel to the first direction.

[0010] Using the above technical solution, the two cylinder blocks have bearing holes on their two side walls facing each other in the first direction. These bearing holes are arranged opposite each other, allowing the crankshaft to pass through sequentially, thus providing stable two-point support for the crankshaft. Furthermore, since the bearing holes are parallel to the first direction, meaning the bearing holes on the side walls of the cylinder blocks are shaped holes, the shaped holes provide better support for the crankshaft and can withstand greater loads in the vertical direction.

[0011] According to another specific embodiment of the present invention, the engine cylinder block disclosed in the embodiment of the present invention has a bearing assembly between the bearing hole and the crankshaft, and the bearing assembly is movably connected to the crankshaft.

[0012] By employing the above technical solution, the crankshaft is separated from the bearing bore by a bearing assembly, reducing friction between the crankshaft and the bearing bore during rotation. Therefore, the bearing assembly is a component that reduces friction, such as ball bearings, needle roller bearings, and bearing shells. Furthermore, the bearing assembly supports and secures the crankshaft, ensuring its normal operating position and rotational accuracy.

[0013] According to another specific embodiment of the present invention, the engine cylinder block disclosed in this embodiment of the present invention includes two annular bearings fixedly connected to bearing holes, and the annular bearings are movably connected to the crankshaft.

[0014] By adopting the above technical solution, the shape of the ring bearing is adapted to the shape of the bearing hole and the outer circumference of the crankshaft, which reduces friction and reduces the gap between the bearing hole and the crankshaft, thus ensuring the stability and accuracy of the crankshaft when rotating at high speed.

[0015] According to another specific embodiment of the present invention, the engine cylinder block disclosed in the embodiment of the present invention includes a bearing assembly comprising a plurality of bearing shells fixedly connected to the bearing bore, each bearing shell being adapted to the outer circumferential shape of the crankshaft and movably connected.

[0016] By adopting the above technical solution, the bearing bush's shape is adapted to the crankshaft's outer circumference and movably connected, which reduces friction between the crankshaft and the bearing bore, and also reduces the clearance between the bearing bore and the crankshaft, ensuring the stability and accuracy of the crankshaft during high-speed rotation. When the bearing bore is formed on the two side walls of two interconnected sub-cylinders, and a portion of the bearing bore is formed on the side wall of each sub-cylinder, and the two sub-cylinders are fixedly connected to jointly form the bearing bore, the bearing bush's cross-section is arc-shaped, making it easy to fix the bearing bush to the portion of the bearing bore formed on the side wall of the sub-cylinder, which is beneficial for the combined installation of separate bearing bores.

[0017] According to another specific embodiment of the present invention, the engine cylinder block disclosed in the embodiment of the present invention has two sub-cylinder blocks that are fixedly connected by multiple fixing components. The multiple fixing components are disposed at the connection point of the two sub-cylinder blocks, and the two ends of each fixing component are respectively connected to the two sub-cylinder blocks.

[0018] Using the above technical solution, the connection between the two cylinder blocks is a seam, formed on the top and bottom of the engine block and on two opposing side walls parallel to the first direction. Therefore, multiple fixing components are needed to securely connect the two cylinder blocks. Each fixing component has two ends connected to the two cylinder blocks respectively. Connecting the two ends of each fixing component connects the two cylinder blocks, and separating the two cylinder blocks separates them, facilitating the disassembly and installation of the engine block. Furthermore, the fixing components are only used to connect the two cylinder blocks in the first direction and do not need to bear large loads in the vertical direction. Therefore, ordinary fasteners can be used, resulting in lower load-bearing capacity requirements and reduced manufacturing costs.

[0019] According to another specific embodiment of the present invention, the engine cylinder block disclosed in the embodiment of the present invention includes a fastener and two fixing platforms connected to the fastener. The two fixing platforms are respectively disposed at the connection of two sub-cylinder blocks and protrude from the outer surface of the corresponding sub-cylinder block. The two fixing platforms are respectively provided with fixing holes adapted to the corresponding fasteners, and the axis of the fixing holes is parallel to the first direction.

[0020] Using the above technical solution, since the joint connecting the two cylinder blocks is formed on the top, bottom and two opposite side walls parallel to the first direction of the engine cylinder block, all four surfaces are flat, two fixing platforms are respectively set at the connection of the two cylinder blocks. The connecting platform protrudes from the outer surface of the corresponding cylinder block. The two fixing platforms are respectively provided with fixing holes adapted to the corresponding fasteners, and the axis of the fixing holes is parallel to the first direction. The two fixing platforms are connected by fasteners passing through the fixing holes in sequence, that is, the two ends of each fixing component are connected.

[0021] According to another specific embodiment of the present invention, the engine cylinder block disclosed in the embodiment of the present invention includes reinforcing ribs in the cavity formed between the two sub-cylinder blocks.

[0022] Using the above technical solution, since the two sub-cylinders together form a chamber to house the cylinder, the two sub-cylinders need to bear a large load during the reciprocating motion of the cylinder piston. In order to strengthen the structural strength of the two sub-cylinders, reinforcing ribs are set in the chamber. In addition, the reinforcing ribs can also reduce the noise generated by piston resonance in the sub-cylinders.

[0023] According to another specific embodiment of the present invention, the engine block disclosed in the embodiment of the present invention further includes a cooling component and / or a lubrication component in the cavity formed between the two sub-cylinder bodies.

[0024] By adopting the above technical solution, the cooling components and / or lubrication components are integrated into the chamber formed between the two sub-cylinder bodies, eliminating the need to connect the cooling components and / or lubrication components to the bottom of the engine block via additional connectors, thereby simplifying the connection structure of the engine block.

[0025] The present invention also discloses an engine, including the engine block provided in the above embodiments, as well as a crankshaft, a cylinder, and a cylinder head.

[0026] By adopting the above technical solution, including the engine block provided in the above embodiments, the engine can withstand a large load generated by the cylinder driving the piston in the vertical direction. In addition, compared with the prior art, the method of connecting the skirt or other structural components in the vertical direction of the engine block with high-strength bolts can reduce the load-bearing requirements of the connecting components and reduce the overall engine manufacturing cost.

[0027] The beneficial effects of the utility model are:

[0028] This utility model provides an engine block and an engine. The engine block has an internal chamber, a cylinder bore at its top, and bearing holes on two opposite side walls on its outer periphery. A crankshaft passes through these bearing holes. The internal chamber of the engine block, besides housing the cylinder, can also house other structural components. The cylinder bore at the top of the engine block facilitates the housing of the cylinder within the internal chamber. When the engine is running, the cylinder drives the piston to reciprocate vertically within the chamber. The crankshaft passes through the bearing holes on the two opposite side walls on the outer periphery of the engine block and the internal chamber, with the bearing holes on the two side walls providing support for the crankshaft. By configuring the engine block as two sub-cylinder blocks arranged sequentially and fixedly along a first direction, with the tops of the two sub-cylinder blocks jointly forming the top of the engine block, a portion of the cylinder bore is formed in one sub-cylinder block, and the other portion in the other sub-cylinder block. Thus, when the two sub-cylinder blocks are fixedly connected, the cylinder passes through the cylinder bore at the top of the engine block, which is formed by the tops of the two sub-cylinder blocks. The first direction is the length or width direction of the engine block, that is, the vertical direction perpendicular to the engine block. The two sub-cylinders together form a chamber. In other words, each sub-cylinder is a single structure in the vertical direction. The direction in which the two sub-cylinders are fixedly connected is the length or width direction of the engine block. Therefore, the engine block does not have a split connection structure in its vertical direction. It is not necessary to fix the bottom surface of the cylinder block to the skirt or other structural components in the vertical direction with high-strength bolts. This allows the engine block to withstand a larger load in the vertical direction. In addition, such a structure does not require high-strength bolts. Ordinary bolts or other connectors can be used for connection, which can reduce the load-bearing requirements of the connectors and reduce the overall manufacturing cost of the engine. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the structure of an engine cylinder block in the prior art;

[0030] Figure 2 This is a schematic diagram of the structural assembly of an engine cylinder block in the prior art;

[0031] Figure 3 This is a schematic diagram of the engine cylinder block provided in Embodiment 1 of the present invention;

[0032] Figure 4 This is a schematic diagram of the structural assembly of the engine cylinder block provided in Embodiment 1 of this utility model.

[0033] Explanation of reference numerals in the attached figures:

[0034] 10. Engine block; 100. Sub-block; 110. Chamber; 120. Top of sub-block; 130. Cylinder bore; 140. Bearing bore;

[0035] 20. Fixing component; 200. Fastener; 210. Fixing platform; 220. Fixing hole;

[0036] 30. Cylinder block structure; 300. Upper cylinder block; 310. Skirt; 320. High-strength bolt; 330. Bolt; 340. Main bearing hole; 40. Oil pan;

[0037] X, the first direction. Detailed Implementation

[0038] The engine block is the main body of the engine, connecting all the cylinders and the crankcase into a single unit. It serves as the supporting framework for mounting the cylinders, pistons, crankshaft, and other parts and accessories. As a power output source, the engine generates intense vibrations and friction during operation, thus requiring the engine block to withstand significant loads. Furthermore, the engine block has a complex structure, large size, and considerable weight. With the trend towards lightweight, simplified, and low-cost engines, the load-bearing capacity requirements of the engine block cannot be ignored.

[0039] Most existing engine cylinder blocks employ either a horizontal or gantry-type structure. In the horizontal cylinder block, the bottom surface of the cylinder block is essentially flush with the crankshaft axis. In the gantry-type cylinder block, the main bearing housing is independent of the cylinder block, and the bottom surface of the cylinder block is lower than the crankshaft axis. In both of these engine cylinder block structures, the bottom surface of the cylinder block needs to be connected to a skirt or other structural components. However, due to the weight of the crankshaft, skirt, or other structural components, they are subjected to downward gravity and vibrations from the piston's reciprocating motion. These components need to withstand significant vertical loads, requiring high-strength bolts to penetrate vertically and fix them to the bottom surface of the cylinder block. When the vertical load is large, the connection between the bottom surface of the cylinder block and the skirt or other structural components becomes unstable. Furthermore, using high-strength bolts requires high load-bearing capacity, increasing manufacturing costs. For example, ... Figure 1 and Figure 2As shown, the cylinder block structure 30 in the prior art includes, from top to bottom, an upper cylinder block 300 and a skirt 310 in the vertical direction, and an integrated oil pan 40 (or other structural components) at the bottom. Furthermore, a portion of the main bearing hole 340 is formed on the two opposite side walls where the skirt 310 connects to the upper cylinder block 300, and another portion of the main bearing hole 340 is formed on the two opposite side walls where the bottom surface of the upper cylinder block 300 connects to the skirt 310 (or other structural components). The upper cylinder block 300 and the skirt 310 (or other structural components) are connected by high-strength bolts 320. That is, the existing solutions all require the upper cylinder block 300 and the skirt 310 to be fixedly connected in the vertical direction to form a complete main bearing hole 340. The oil pan 40 and the skirt 310 also need to be connected by bolts 330. When the piston reciprocates in the vertical direction, the connection of the main bearing hole 340 fixedly connected in the vertical direction is easily affected by large vibrations, which can easily cause instability at the connection of the main bearing hole 340. In addition, the use of more fastening bolts 330 increases the total weight of the engine block and the manufacturing cost.

[0040] In summary, this utility model provides an engine block and an engine, solving the problem in the prior art where the bottom surface of the engine block needs to be fixed to the skirt or other structural components by high-strength bolts running vertically through it. When the vertical load is large, the connection between the bottom surface of the engine block and the skirt or other structural components is unstable. Furthermore, the use of high-strength bolts requires high load-bearing capacity, which increases the overall weight of the engine block and the engine, as well as the manufacturing cost.

[0041] To make the objectives, technical solutions, and advantages of this utility model clearer, the embodiments of this utility model will be described in further detail below with reference to the accompanying drawings.

[0042] Example 1

[0043] First, let's give an overall description of the structure of this engine block.

[0044] like Figure 3 and Figure 4 As shown, in a specific embodiment of the present invention, the engine cylinder 10 has a chamber 110 inside, a cylinder bore 130 at the top, and bearing holes 140 on two opposite side walls on the outer periphery of the engine cylinder 10. After the engine is installed, the crankshaft will pass through the bearing holes 140 in sequence.

[0045] Specifically, the chamber 110 inside the engine block 10, in addition to housing the cylinder, can also house other structural components, such as cooling components and lubrication components. The cylinder bore 130 at the top of the engine block 10 facilitates the placement of the cylinder within the chamber 110. When the engine is installed and operating, the cylinder drives the piston to reciprocate vertically within the chamber 110. The crankshaft passes sequentially through bearing holes 140 on two opposite side walls of the outer periphery of the engine block 10 and through the chamber 110 inside the engine block 10. The bearing holes 140 on the two side walls provide support for the crankshaft.

[0046] Furthermore, such as Figure 3 and Figure 4 As shown, the engine block 10 includes two sub-cylinders 100 arranged sequentially and fixedly connected along a first direction (X direction in the figure), the two sub-cylinders 100 together forming a chamber 110. It should be noted that the first direction X in the figure corresponds to the length direction of the engine block 10. In other alternative embodiments, the first direction X can also correspond to other directions, such as the width direction of the engine block 10, as long as the first direction X is perpendicular to the vertical direction of the engine block 10. That is, each sub-cylinder 100 is a single-piece structure in the vertical direction, and the direction in which the two sub-cylinders 100 are fixedly connected is the length or width direction of the engine block 10. Therefore, the engine block 10 does not have a separate connection structure in its vertical direction, and it is not necessary to fix the bottom surface of the cylinder block to the skirt or other structural components along the vertical direction using high-strength bolts. This eliminates the problem of unstable connection at the connection point between the bottom surface of the cylinder block and the skirt or other structural components when subjected to large loads in the prior art, enabling the engine block 10 to withstand larger loads in the vertical direction. Furthermore, since this structure does not require high-strength bolt connections, ordinary bolts or other connectors can be used, reducing the load-bearing requirements of the connectors. Ordinary bolts or other connectors are lighter and less expensive, which reduces the overall weight and manufacturing cost of the engine. The manufacturing process of the aforementioned 100-cell block structure is simpler and the casting cost is lower.

[0047] It is understood that when two sub-cylinder blocks 100 are arranged sequentially and fixedly connected along the first direction X, two bearing holes 140 are respectively provided on the side wall of each sub-cylinder block 100 and are opened opposite each other. The opening direction of the bearing holes 140 is parallel to the length direction of the engine cylinder block 10. In other alternative embodiments, they can also be parallel to the width direction of the engine cylinder block 10, as long as they are opened on the side wall of each sub-cylinder block 100 for the crankshaft to pass through.

[0048] The tops 120 of the two sub-cylinders together form the top of the engine cylinder block 10, such that a portion of the cylinder bore 130 is formed in one of the sub-cylinders 100 and another portion is formed in the other sub-cylinder 100, so that when the two sub-cylinders 100 are fixedly connected, the cylinder passes through the cylinder bore 130 at the top of the engine cylinder block 10, which is formed by the tops 120 of the two sub-cylinders.

[0049] In summary, in the working scenario, the engine including the engine block 10 disclosed in the above embodiments, with the cylinders passing through the cylinder bore 130 and housed in the chamber 110, drives the piston to reciprocate vertically within the chamber 110. This process generates significant vibration, thus requiring the two sub-cylinder blocks 100 to withstand substantial vertical loads. By configuring the engine block 10 as two sub-cylinder blocks 100 sequentially arranged and fixedly connected along the first direction X, with each sub-cylinder block 100 having an integral structure in the vertical direction, the problem of unstable connection at the connection between the cylinder block bottom surface and the skirt or other structural components in the prior art when subjected to large loads is eliminated, enabling the engine block 10 to withstand larger loads in the vertical direction. Furthermore, the load-bearing requirements of the connecting parts can be reduced; ordinary bolts or other connecting parts are lighter and less expensive, reducing the overall weight and manufacturing cost of the engine.

[0050] According to another specific embodiment of this utility model, such as Figure 3 and Figure 4 As shown, the two side walls of the two cylinder blocks 100, which are arranged opposite each other in the first direction X, respectively constitute: two side walls of the engine cylinder block 10 having bearing holes 140, and the opening direction of the bearing holes 140 is parallel to the first direction X.

[0051] Specifically, each of the two sub-cylinder blocks 100 has a bearing hole 140 on its two opposite sidewalls in the first direction X. The two bearing holes 140 are positioned opposite each other, allowing the crankshaft to pass through sequentially, thus providing stable two-point support for the crankshaft. Furthermore, since the bearing holes 140 are parallel to the first direction X, meaning they are located on the non-connected sidewalls of each sub-cylinder block 100, and these sidewalls are complete planes, the bearing holes 140 are formed holes. Formed holes provide better fixation and support for the crankshaft and can withstand greater loads in the vertical direction. When the bearing holes 140 are formed holes, ball bearings or needle roller bearings can be installed between the crankshaft and the bearing holes 140.

[0052] Furthermore, due to such Figure 1 and Figure 2 The prior art engine cylinder block structure 30 shown has a complex process and increased manufacturing costs due to the need for a cover to be made for the main bearing hole 340 between the upper cylinder block 300 and the skirt 310. The bearing hole 140 in this embodiment is a formed hole, which simplifies the processing and can effectively reduce manufacturing costs.

[0053] According to another specific embodiment of the present invention, a bearing assembly (not shown in the figure) is provided between the bearing hole 140 and the crankshaft, so that the bearing assembly and the crankshaft can be movably connected after the engine is installed.

[0054] Specifically, the crankshaft is separated from the bearing bore 140 by a bearing assembly, reducing friction between the crankshaft and the bearing bore 140 during crankshaft rotation. Therefore, the bearing assembly is a component that reduces friction, such as a ball bearing, needle roller bearing, or bearing shell. In addition, the bearing assembly can support and fix the crankshaft, ensuring the normal working position and rotational accuracy of the crankshaft.

[0055] According to another specific embodiment of the present invention, the bearing assembly includes two annular bearings respectively fixedly connected to the bearing bore 140, and the annular bearings are movably connected to the crankshaft.

[0056] Specifically, the shape of the ring bearing is adapted to the shape of the bearing bore 140 and the outer circumference of the crankshaft, which reduces friction and also reduces the clearance between the bearing bore 140 and the crankshaft, ensuring the stability and accuracy of the crankshaft when rotating at high speed.

[0057] According to another specific embodiment of the present invention, the bearing assembly includes a plurality of bearing shells fixedly connected to the bearing hole 140, each bearing shell being adapted to the outer circumferential shape of the crankshaft and movably connected.

[0058] Specifically, the bearing shell's shape is adapted to the outer periphery of the crankshaft and is movably connected, which can reduce the friction between the crankshaft and the bearing bore 140 when the crankshaft rotates, and also reduce the gap between the bearing bore 140 and the crankshaft, thus ensuring the stability and accuracy of the crankshaft when it rotates at high speed.

[0059] It should be noted that when the bearing bore 140 is formed on the two side walls of the two interconnected cylinder blocks 100, and a portion of the bearing bore 140 is formed on the side wall of each cylinder block 100, and the two cylinder blocks 100 are fixedly connected to jointly form the bearing bore 140, the bearing pad has an arc-shaped cross-section, which facilitates the fixed connection of the bearing pad to the portion of the bearing bore 140 formed on the side wall of the cylinder block 100. This is beneficial for the combined installation of the separate bearing bore 140. It is understood that the number of bearing pads can be two, four, six, etc., and those skilled in the art can choose the specific number reasonably according to their needs, as long as it helps to reduce the friction between the crankshaft and the bearing bore 140 during crankshaft rotation.

[0060] According to another specific embodiment of this utility model, such as Figure 3 and Figure 4As shown, the two cylinder bodies 100 are fixedly connected by a plurality of fixing components 20. The plurality of fixing components 20 are disposed at the connection of the two cylinder bodies 100, and the two ends of each fixing component 20 are respectively connected to the two cylinder bodies 100.

[0061] Specifically, the connection between the two cylinder blocks 100 is a seam, which is formed on the top and bottom of the engine cylinder block 10 and on two opposing side walls parallel to the first direction X. Therefore, multiple fixing components 20 are required to fix the two cylinder blocks 100 together. Each fixing component 20 has two ends connected to the two cylinder blocks 100 respectively. The two cylinder blocks 100 can be connected by connecting the two ends of each fixing component 20, and the two cylinder blocks 100 can be separated by separating the two ends of each fixing component 20, which facilitates the disassembly and installation of the engine cylinder block 10. Furthermore, the fixing components 20 are only used to connect the two cylinder blocks 100 in the first direction X, and do not need to bear large loads in the vertical direction. Therefore, ordinary fasteners can be used for the fixing components 20, and the load-bearing capacity requirements of the fixing components 20 are low. Ordinary bolts or other fasteners are lightweight and low-cost, which can reduce the overall weight and manufacturing cost of the engine.

[0062] It should be noted that the fixing component 20 can be configured such that each sub-cylinder body 100 is connected to two fixing platforms, each platform having fixing holes starting along the first direction X. The two sub-cylinder bodies 100 are fixedly connected by fasteners passing through and engaging with these fixing holes. The fasteners can be threaded cylindrical structures such as bolts or screws, and the fixing holes can have threads to accommodate the fasteners, or they can be secured with nuts after passing through the fixing holes. In other alternative embodiments, each sub-cylinder body 100 is connected to two connecting ears, each ear having connecting holes starting along the first direction X. The two sub-cylinder bodies 100 are fixedly connected by fasteners passing through and engaging with these connecting holes. The fasteners can be threaded cylindrical structures such as bolts or screws, and the connecting holes can have threads to accommodate the fasteners, or they can be secured with nuts after passing through the connecting holes.

[0063] Understandably, the specific number of fixing components 20 can be set to four, eight, twelve, etc., as long as they can be fixedly connected between the two cylinder bodies 100.

[0064] According to another specific embodiment of this utility model, such as Figure 3 and Figure 4As shown, each fixing component 20 includes a fastener 200 and two fixing platforms 210 connected to the fastener 200. The two fixing platforms 210 are respectively disposed at the connection of the two sub-cylinder bodies 100 and protrude from the outer surface of the corresponding sub-cylinder body 100. The two fixing platforms 210 are respectively provided with fixing holes 220 adapted to the corresponding fastener 200, and the axis of the fixing holes 220 is parallel to the first direction X.

[0065] Specifically, since the joint connecting the two cylinder blocks 100 is formed on the top, bottom and two opposite side walls parallel to the first direction X of the engine cylinder block 10, and all four surfaces are flat, two fixing platforms 210 are respectively set at the connection of the two cylinder blocks 100. The connecting platform protrudes from the outer surface of the corresponding cylinder block 100. The two fixing platforms 210 are respectively provided with fixing holes 220 that are adapted to the corresponding fasteners 200, and the axis of the fixing holes 220 is parallel to the first direction X. The two fixing platforms 210 are connected by the fasteners 200 passing through the fixing holes 220 in sequence, that is, the two ends of each fixing component 20 are connected.

[0066] It is understood that the fastener 200 can be a cylindrical structure with threads on its outer periphery, such as a bolt or screw. The fixing hole 220 can also have threads to fit the fastener 200, or the fastener 200 can be fixed with a nut after passing through the fixing hole. In this embodiment, the fastener 200 is shorter than the high-strength bolts used in the vertical direction in the prior art, and correspondingly, its specifications and model requirements are also lower.

[0067] According to another specific embodiment of the present invention, the cavity 110 formed between the two cylinder bodies 100 includes reinforcing ribs (not shown in the figure).

[0068] Specifically, since the two sub-cylinder bodies 100 together form a chamber 110, which is used to house the cylinder, the two sub-cylinder bodies 100 need to bear a large load during the reciprocating motion of the cylinder piston. In order to strengthen the structural strength of the two sub-cylinder bodies 100, reinforcing ribs are provided in the chamber 110. In addition, the reinforcing ribs can also reduce the noise generated by piston resonance in the sub-cylinder bodies 100.

[0069] According to another specific embodiment of the present invention, the chamber 110 formed between the two cylinder bodies 100 also includes a cooling assembly and / or a lubrication assembly (not shown in the figure).

[0070] Specifically, the cooling and / or lubrication components are integrated into a chamber 110 formed between the two cylinder blocks 100 bodies, eliminating the need for additional connectors at the bottom of the engine block 10 to connect the cooling and / or lubrication components, thus simplifying the connection structure of the engine block 10. Compared to the prior art where the cooling and / or lubrication components need to be connected to the bottom of the cylinder block via connectors, the integrated structure meets the requirements for a more compact overall layout, reducing the overall size of the engine and the number of connectors required.

[0071] Example 2

[0072] This utility model also provides an engine, including the engine block provided in the above embodiments, as well as a crankshaft, cylinder, and cylinder head.

[0073] The engine with the engine block provided in the above embodiments can withstand a large load generated by the cylinder driving the piston in the vertical direction. In addition, compared with the prior art, the method of connecting the skirt or other structural components in the vertical direction of the engine block with high-strength bolts can reduce the load-bearing requirements of the connecting parts. Ordinary bolts or other connecting parts are smaller in weight and lower in cost, which can reduce the overall weight and manufacturing cost of the engine.

[0074] It should be noted that, in addition to the specific embodiments described above, those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. Although the description of this utility model will be presented in conjunction with preferred embodiments, this does not mean that the features of this utility model are limited to that embodiment. On the contrary, the purpose of describing the utility model in conjunction with the embodiments is to cover other options or modifications that may be derived from the claims of this utility model. To provide a deep understanding of this utility model, many specific details will be included in the following description. This utility model may also be implemented without using these details. Furthermore, to avoid confusion or obscuring the focus of this utility model, some specific details will be omitted in the description. It should be noted that, unless otherwise specified, the embodiments and features in the embodiments of this utility model can be combined with each other.

[0075] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined or explained in subsequent drawings.

[0076] In the description of this embodiment, it should be noted that the terms "upper", "lower", "inner", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship that the utility model product is usually placed in during use. They are only for the convenience of describing the utility model 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. Therefore, they should not be construed as limitations on the utility model.

[0077] The terms “first”, “second”, etc., are used only to distinguish descriptions and should not be interpreted as indicating or implying relative importance.

[0078] In the description of this embodiment, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this embodiment based on the specific circumstances.

[0079] Although the present invention has been illustrated and described with reference to certain preferred embodiments, those skilled in the art should understand that the above description is a further detailed explanation of the present invention in conjunction with specific embodiments, and should not be construed as limiting the specific implementation of the present invention to these descriptions. Those skilled in the art can make various changes in form and detail, including some simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. An engine block, wherein the engine block has a chamber inside, a cylinder bore at the top, and bearing bores are respectively provided on two opposite side walls of the outer periphery of the engine block, through which a crankshaft passes in sequence; characterized in that: The engine block includes two sub-cylinders arranged sequentially and fixedly connected along a first direction, the two sub-cylinders together forming the chamber; The tops of the two cylinder blocks together constitute the top of the engine cylinder block, such that a portion of the cylinder bore is formed in one cylinder block and the other portion is formed in the other cylinder block.

2. The engine block as described in claim 1, characterized in that, The two sidewalls of the two sub-cylinders, which are arranged opposite each other in the first direction, respectively constitute the two sidewalls of the engine cylinder having the bearing holes, and the opening direction of the bearing holes is parallel to the first direction.

3. The engine block as described in claim 1, characterized in that, A bearing assembly is provided between the bearing bore and the crankshaft, and the bearing assembly is movably connected to the crankshaft.

4. The engine block as described in claim 3, characterized in that, The bearing assembly includes two annular bearings fixedly connected to the bearing bores, and the annular bearings are movably connected to the crankshaft.

5. The engine block as described in claim 3, characterized in that, The bearing assembly includes a plurality of bearing shells fixedly connected to the bearing bore, each bearing shell being adapted to the outer circumferential shape of the crankshaft and movably connected.

6. The engine block as described in any one of claims 1-5, characterized in that, The two cylinder bodies are fixedly connected by multiple fixing components, which are disposed at the connection point of the two cylinder bodies, and each fixing component is connected to the two cylinder bodies at both ends.

7. The engine block as described in claim 6, characterized in that, Each of the fixing components includes a fastener and two fixing platforms connected to the fastener. The two fixing platforms are respectively disposed at the connection of the two cylinder bodies and protrude from the outer surface of the corresponding cylinder body. The two fixing platforms are respectively provided with fixing holes adapted to the corresponding fastener, and the axis of the fixing holes is parallel to the first direction.

8. The engine block as described in any one of claims 1-5, characterized in that, The cavity formed between the two cylinder bodies includes reinforcing ribs.

9. The engine block as described in any one of claims 1-5, characterized in that, The cavity formed between the two cylinder bodies also includes a cooling assembly and / or a lubrication assembly.

10. An engine, characterized in that, Includes the engine block as described in any one of claims 1-9, and the crankshaft, cylinder, and cylinder head.

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