Two-stroke horizontally-opposed engine piston connecting rod in-cylinder tool and assembling method

Abstract

The invention relates to the technical field of engine assembly, and provides a two-stroke horizontally-opposed engine piston connecting rod in-cylinder tool and an assembly method.The two-stroke horizontally-opposed engine piston connecting rod in-cylinder tool comprises a bearing part, a top in-cylinder part and a bottom in-cylinder part; the bearing part comprises a chassis and a turnover frame, and the turnover frame is used for bearing an engine cylinder body and is rotatably arranged on the chassis; the top cylinder entering part is arranged in a barrel shape, is mounted at the top of the cylinder body, and is used for compressing a piston ring so as to mount a piston or a piston connecting rod assembly into the cylinder body from the top of the cylinder body; and the bottom cylinder entering part is annularly arranged, is mounted at the bottom of the cylinder body, and is used for compressing the piston ring to ensure that part of the piston can stretch out and retract from the bottom of the cylinder body, and constraining the piston in the bottom cylinder entering part. The piston connecting rod can be smoothly mounted in the cylinder body, mounting process holes do not need to be formed in the cylinder body, and the assembly quality and the assembly efficiency are ensured.

Description

Technical Field

[0001] The invention relates to the technical field of engine assembly, and in particular to a two-stroke horizontally opposed engine piston connecting rod cylinder insertion tool and an assembly method. Background Art

[0002] When assembling the piston connecting rod of an engine into a cylinder, a tool is usually used to assist the assembly, so as to facilitate the convenient assembly of the piston connecting rod and the cylinder body.

[0003] At present, there are two ways to put the piston and connecting rod of a two-stroke horizontally opposed engine into the cylinder. The first way is to put the piston and connecting rod into the cylinder from the bottom of the cylinder body, and use a combination tooling to clamp the piston and piston ring. During the assembly process, the space is small and cannot be accurately positioned, and the coaxiality of the piston and the cylinder hole cannot be ensured, making it difficult to insert the piston into the cylinder. The tooling is complex and occupies a large space. During the assembly process, the space between the cylinder body and the casing is small and the operation is inconvenient. The piston and piston ring are easily scratched during the sliding process in the combination tooling.

[0004] The second method is to open a piston pin installation process hole on the side of the cylinder block, but this will affect the water and air channel layout of the two-stroke engine cylinder block, reduce the cylinder block strength and increase the complexity of the cylinder block, thereby reducing the cylinder block cooling effect and the engine intake efficiency. In addition, since the piston pin installation process hole can only be opened on both sides of the cylinder block in the front and rear directions, the piston pin installation process hole cannot be opened in the middle cylinder when the number of cylinders in a single row is more than two cylinders. Summary of the invention

[0005] The invention provides a two-stroke horizontally opposed engine piston connecting rod cylinder insertion tool and an assembly method, which are used to solve the problems in the prior art that the piston connecting rod cylinder insertion operation of the two-stroke horizontally opposed engine is inconvenient and it is difficult to ensure the assembly quality and assembly efficiency.

[0006] In order to solve the above-mentioned technical problems, the present invention is achieved as follows: In a first aspect, the present invention provides a two-stroke horizontally opposed engine piston connecting rod cylinder tooling, comprising: a bearing member, a top cylinder entry member and a bottom cylinder entry member; The bearing member comprises a chassis and a turning frame, wherein the turning frame is used to bear the engine cylinder block, and the turning frame is rotatably arranged on the chassis; The top cylinder entry member is provided in a cylindrical shape, and the top cylinder entry member is installed on the top of the cylinder body, and the top cylinder entry member is used to compress the piston ring so as to install the piston or the piston connecting rod assembly into the cylinder body from the top of the cylinder body; The bottom cylinder entry member is arranged in a ring shape and is installed at the bottom of the cylinder body. The bottom cylinder entry member is used to compress the piston ring to ensure that part of the piston can extend and retract from the bottom of the cylinder body and constrain the piston in the bottom cylinder entry member.

[0007] According to a two-stroke horizontally opposed engine piston connecting rod cylinder tooling provided by the present invention, the inner wall of the top cylinder entry part gradually shrinks along the axial direction of the top cylinder entry part from one end away from the cylinder body to one end close to the cylinder body.

[0008] According to the two-stroke horizontally opposed engine piston connecting rod cylinder insertion tooling provided by the present invention, the top cylinder insertion part has a sharp corner at one end close to the cylinder body; The pointed corner is matched with a groove at one end of the cylinder body close to the top cylinder entry part, so that the joint surface after the top cylinder entry part and the cylinder body are assembled presents a smooth transition.

[0009] According to the two-stroke horizontally opposed engine piston connecting rod cylinder tooling provided by the present invention, the peripheral wall of the bottom cylinder entry part has a notch; The width of the notch is greater than the width of the connecting rod.

[0010] According to a two-stroke horizontally opposed engine piston connecting rod cylinder insertion tooling provided by the present invention, the inner wall of the bottom cylinder insertion part has a boss; The boss is arranged at one end of the bottom cylinder entry member away from the cylinder body.

[0011] In a second aspect, the present invention provides a method for assembling a piston connecting rod of a two-stroke horizontally opposed engine into a cylinder using the above-mentioned piston connecting rod cylinder tooling, comprising: Assemble the connecting rods of the first and third cylinders to the connecting rod shaft diameter position of the first and third cylinders of the crankshaft; Assemble and secure the two-four cylinder block to the second side of the casing; Based on the top cylinder entry parts, install the piston connecting rod assembly of the second and fourth cylinders into the second and fourth cylinder bodies from the top of the second and fourth cylinder bodies; Based on the top cylinder entry and the bottom cylinder entry, assemble the pistons of the first and third cylinders into a three-cylinder body; A three-cylinder body equipped with one-cylinder and three-cylinder pistons is installed into the first side of the casing, and the pistons of the one-cylinder and three-cylinder are connected with the connecting rods of the one-cylinder and three-cylinder.

[0012] According to an assembly method provided by the present invention, the step of assembling the connecting rods of the first and third cylinders to the axial diameter position of the connecting rods of the first and third cylinders of the crankshaft comprises: Assemble the connecting rods of the first and third cylinders to the connecting rod shaft diameter position of the second and fourth cylinders of the crankshaft; Slide the connecting rods of the first and third cylinders from the connecting rod shaft diameter position of the second and fourth cylinders on the crankshaft to the connecting rod shaft diameter position of the first and third cylinders on the crankshaft.

[0013] According to an assembly method provided by the present invention, the step of assembling the pistons of the first and third cylinders into a three-cylinder body based on the top cylinder entry member and the bottom cylinder entry member comprises: Install the bottom cylinder fitting into the bottom of a three-cylinder body; Install the top cylinder fitting into the top of a three-cylinder body; Install the pistons of the first and third cylinders into the body of the first and third cylinders through the top cylinder entry piece, and push the pistons of the first and third cylinders until the bottoms of the pistons of the first and third cylinders are stuck in the bottom cylinder entry piece.

[0014] According to an assembly method provided by the present invention, the steps of installing a three-cylinder body equipped with a first-cylinder and a third-cylinder piston into a first side of a casing, and connecting the first-cylinder and the third-cylinder pistons with the first-cylinder and the third-cylinder connecting rods include: Mounting a three-cylinder block on a first side of the receiver and ensuring that a bottom of the three-cylinder block is spaced a preset distance from a mounting surface of the receiver; Connect the pistons of the first and third cylinders with the connecting rods of the first and third cylinders within a preset distance; Remove the bottom entry piece and push the three-cylinder block until the three-cylinder block fits against the mounting surface of the casing.

[0015] According to an assembly method provided by the present invention, the step of connecting the first and third cylinder pistons with the first and third cylinder connecting rods within a preset distance comprises: Push the pistons of the first and third cylinders and the bottom cylinder entry parts in the direction close to the mounting surface of the casing until the piston pin hole is exposed in the first and third cylinder body; Connect the pistons of the first and third cylinders with the connecting rods of the first and third cylinders through the piston pin hole.

[0016] The two-stroke horizontally opposed engine piston connecting rod cylinder tooling and assembly method provided by the present invention are provided with a bearing member, a top cylinder entry member and a bottom cylinder entry member. The bearing member is used to support the engine cylinder body and can flip the engine to operate the engine. The top cylinder entry member is used to compress the piston ring so as to install the piston or the piston connecting rod assembly from the top of the cylinder body into the cylinder body. The bottom cylinder entry member is used to compress the piston ring to ensure that part of the piston can extend and retract from the bottom of the cylinder body, and constrain the piston in the bottom cylinder entry member, so that the piston connecting rod of the two-stroke horizontally opposed engine can be smoothly installed in the cylinder body, and there is no need to open an installation process hole on the cylinder body, thereby simplifying the design of the cylinder body and ensuring assembly quality and assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the technical solutions in the present invention or the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] Figure 1 It is a schematic diagram of the installation of the top cylinder entry member and the bottom cylinder entry member provided by the present invention after being installed in the cylinder body.

[0019] Figure 2 The present invention provides Figure 1 Enlarged view of the K part.

[0020] Figure 3 The present invention provides Figure 1 Enlarged view of the J part.

[0021] Figure 4 It is a schematic diagram of the three-dimensional structure of the bearing member provided by the present invention.

[0022] Figure 5 This is one of the schematic diagrams of the piston connecting rod into the cylinder assembly provided by the present invention.

[0023] Figure 6 This is the second schematic diagram of the piston connecting rod into the cylinder assembly provided by the present invention.

[0024] Figure 7 This is the third schematic diagram of the piston connecting rod into the cylinder assembly provided by the present invention.

[0025] Figure 8 This is the fourth schematic diagram of the piston connecting rod into the cylinder assembly provided by the present invention.

[0026] Fig. 9 This is the fifth schematic diagram of the piston connecting rod into the cylinder assembly provided by the present invention.

[0027] Fig.10 This is the sixth schematic diagram of the piston connecting rod into cylinder assembly provided by the present invention.

[0028] Fig.11 This is the seventh schematic diagram of the piston connecting rod into cylinder assembly provided by the present invention.

[0029] Fig.12 This is the eighth schematic diagram of the piston connecting rod into cylinder assembly provided by the present invention.

[0030] Fig.13 This is the ninth schematic diagram of the piston connecting rod into cylinder assembly provided by the present invention.

[0031] Fig.14 The present invention is a flowchart of a method for assembling a piston and connecting rod of a two-stroke horizontally opposed engine into a cylinder using a tool for inserting a piston and connecting rod into a cylinder provided by the present invention.

[0032] Fig.15 It is a schematic diagram of the process of assembling the connecting rods of the first and third cylinders to the first side of the casing provided by the present invention.

[0033] Fig.16 It is a schematic diagram of the process of assembling the pistons of the first and third cylinders into a three-cylinder body through the top cylinder entry part and the bottom cylinder entry part provided by the present invention.

[0034] Fig.17The present invention provides a schematic flow chart of installing a three-cylinder body equipped with a first-cylinder and a third-cylinder piston into a first side of a casing, and connecting the first-cylinder and the third-cylinder pistons with the first-cylinder and the third-cylinder connecting rods.

[0035] Fig.18 It is a schematic diagram of a process of connecting the first and third cylinder pistons with the first and third cylinder connecting rods within a preset distance provided by the present invention.

[0036] Reference numerals: 1. Cylinder entry tooling; 11. Carrying parts; 12. Top cylinder entry parts; 13. Bottom cylinder entry parts; 111, chassis; 112, flip frame; 121, sharp corner; 131, notch; 132, boss; 2. Cylinder block; 21. 13 cylinder block; 22. 24 cylinder block; 3. Piston; 31. Piston of the first and third cylinders; 32. Piston of the second and fourth cylinders; 311. Gas ring; 312. Oil ring; 313. Piston pin; 314. Circlip; 315. Plug; 4. Connecting rod; 41. Connecting rod of cylinder 1 and 3; 42. Connecting rod of cylinder 2 and 4; 411. Connecting rod cap of cylinder 1 and 3; 412. Connecting rod bolt of cylinder 1 and 3; 421. Connecting rod cap of cylinder 2 and 4; 422. Connecting rod bolt of cylinder 2 and 4; 5. Receiver; 6. Connecting bolts. DETAILED DESCRIPTION

[0037] In order to make the purpose, technical solution and advantages of the present invention clearer, the technical solution of the present invention will be clearly and completely described below in conjunction with the drawings of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Combine the following Figures 1 to 18 The piston connecting rod cylinder tooling and assembly method of a two-stroke horizontally opposed engine provided by an embodiment of the present invention are described in detail through specific embodiments and application scenarios.

[0039] First, as Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, this embodiment provides a two-stroke horizontally opposed engine piston connecting rod cylinder tooling 1, including: a bearing member 11, a top cylinder member 12 and a bottom cylinder member 13.

[0040] The supporting member 11 includes a chassis 111 and a turning frame 112 . The turning frame 112 is used to support the engine cylinder block 2 . The turning frame 112 is rotatably disposed on the chassis 111 .

[0041] The top cylinder entry member 12 is provided in a cylindrical shape and is installed on the top of the cylinder body 2 . The top cylinder entry member 12 is used to compress the piston ring so as to install the piston 3 or the piston connecting rod assembly into the cylinder body 2 from the top of the cylinder body 2 .

[0042] The bottom cylinder entry part 13 is arranged in a ring shape and is installed at the bottom of the cylinder body 2. The bottom cylinder entry part 13 is used to compress the piston ring to ensure that part of the piston 3 can extend and retract from the bottom of the cylinder body 2, and constrain the piston 3 in the bottom cylinder entry part 13.

[0043] It is understandable that the chassis 111 provides a mounting support for the flip frame 112, and the chassis 111 is provided with rollers, which can move the supporting member 11 to the target position. The flip frame 112 is used to support the engine block 2, and the flip frame 112 can achieve a 360° flip on the chassis 111, thereby realizing the assembly of the engine block 2 at any angle.

[0044] The piston ring includes an air ring 311 and an oil ring 312 . The piston ring is made of elastic material and can be compressed.

[0045] Specifically, the turning frame 112 and the chassis 111 are rotated via a connecting shaft, and a rotating handle is provided on a column of the chassis 111 , and the turning frame 112 is rotated by operating the rotating handle.

[0046] The two-stroke horizontally opposed engine comprises a three-cylinder block 21, a two-four-cylinder block 22, a casing 5 and a crankshaft. The pistons 3 are evenly distributed on both sides of the crankshaft and move oppositely in the horizontal direction. The three-cylinder block 21 and the two-four-cylinder block 22 are respectively arranged on both sides of the casing 5 in an opposite manner. The three-cylinder block 21 and the two-four-cylinder block 22 are respectively provided with two pistons 3 and connecting rods 4, so that one engine is provided with four pistons 3 and four connecting rods 4 in total.

[0047] Furthermore, the bottom of the piston 3 is provided with an air ring 311 and an oil ring 312, which are made of elastic material. When the piston 3 is installed in the cylinder 2, the piston 3 needs to be clamped with a tool to compress the piston ring so that the piston 3 can be smoothly installed in the cylinder 2. The connecting rod 4 is fixed to the crankshaft through the connecting rod cover and the connecting rod 4 bolts. Since the connecting rod 4 is installed from one side of the cylinder 2, the connecting rod cover needs to be installed from the other side of the cylinder 2. Therefore, the connecting rod 4 and the piston 3 on both sides of the casing 5 cannot be installed synchronously, and the volume of the piston 3 will hinder the installation space of the connecting rod 4.

[0048] The cylindrical setting of the top cylinder entry part 12 contains a hollow cavity inside, which can compress the outer diameter of the piston ring. It can be used to install the piston connecting rod assembly of the second and fourth cylinders into the cylinder body 2 from the top of the second and fourth cylinder body 22, and can also install the piston 3 of the first and third cylinders into the cylinder body 2 from the top of the first and third cylinder body 21.

[0049] The annular setting of the bottom cylinder entry part 13 also contains a cavity inside, which can compress the outer diameter of the piston ring. The bottom cylinder entry part 13 can clamp the bottom of the piston 3, so that the bottom of the piston 3 can extend from the bottom of the cylinder body 2, which is convenient for installing the piston 3 and the connecting rod 4. When the piston 3 and the connecting rod 4 are installed, the bottom of the piston 3 can be retracted from the bottom of the cylinder body 2, and when the piston 3 extends and retracts from the bottom of the cylinder body 2, the bottom cylinder entry part 13 constrains the bottom of the piston 3 in the bottom cylinder entry part 13 to ensure that the piston 3 will not leak out of the bottom cylinder entry part 13 and affect the assembly operation of the piston 3.

[0050] The piston-connecting rod cylinder insertion tool 1 of a two-stroke horizontally opposed engine provided by the present invention is provided with a bearing member 11, a top cylinder insertion member 12 and a bottom cylinder insertion member 13. The bearing member 11 is used to support the engine cylinder body 2 and can operate the engine in a flip manner. The top cylinder insertion member 12 is used to compress the piston ring so as to install the piston 3 or the piston-connecting rod assembly into the cylinder body 2 from the top of the cylinder body 2. The bottom cylinder insertion member 13 is used to compress the piston ring to ensure that part of the piston 3 can extend and retract from the bottom of the cylinder body 2, and constrain the piston 3 in the bottom cylinder insertion member 13, so that the piston 3 and the connecting rod 4 of the two-stroke horizontally opposed engine can be smoothly installed in the cylinder body 2, and there is no need to open an installation process hole on the cylinder body 2, thereby simplifying the design of the cylinder body 2 and ensuring assembly quality and assembly efficiency.

[0051] In some embodiments, Figure 1 As shown, in this embodiment, along the axial direction of the top cylinder entry member 12 from the end away from the cylinder body 2 to the end close to the cylinder body 2, the inner wall of the top cylinder entry member 12 gradually shrinks.

[0052] It can be understood that the inner diameter of the end of the top cylinder entry part 12 away from the cylinder body 2 is equal to the outer diameter of the piston 3 in the free state, and the inner diameter of the end of the top cylinder entry part 12 close to the cylinder body 2 is equal to the inner diameter of the cylinder body 2. Since the inner diameter of the cylinder body 2 is smaller than the outer diameter of the piston 3 in the free state, the inner wall of the top cylinder entry part 12 gradually becomes smaller along the axial direction of the top cylinder entry part 12. As the piston 3 moves in the top cylinder entry part 12, the piston ring is gradually compressed to be equal to the inner diameter of the cylinder body 2, thereby ensuring that the piston 3 is smoothly assembled into the cylinder body 2.

[0053] Specifically, the roughness of the inner wall of the top cylinder entry part 12 is less than 0.4.

[0054] Furthermore, the height of the top cylinder entry 12 is 10 mm greater than the height of the piston 3, which can ensure that the piston 3 can be completely installed in the top cylinder entry 12 without falling off.

[0055] In some embodiments, Figure 1 and Figure 2As shown, the top cylinder entry member 12 of this embodiment has a sharp corner 121 at one end close to the cylinder body 2 .

[0056] The pointed corner 121 is matched with a groove at one end of the cylinder body 2 close to the top cylinder entry part 12, so that the joint surface between the top cylinder entry part 12 and the cylinder body 2 after assembly presents a smooth transition.

[0057] It is understandable that, since a groove is provided at one end of the cylinder body 2 close to the top, when the piston 3 enters the cylinder, the sharp corner 121 of the top cylinder entry part 12 extends into the groove of the cylinder body 2, so that the joint surface between the top cylinder entry part 12 and the cylinder body 2 has a smooth transition, and the piston 3 will not get stuck during installation, which facilitates the smooth installation of the piston 3 into the cylinder body 2. In addition, the sharp corner 121 has a positioning function, which can ensure the accuracy of the installation position of the top cylinder entry part 12 and the top of the cylinder body 2, thereby conveniently realizing the installation of the piston 3 into the cylinder.

[0058] In some embodiments, Figure 8 and Fig.13 As shown, the peripheral wall of the bottom cylinder entry member 13 of this embodiment has a notch 131 .

[0059] The width of the notch 131 is greater than the width of the connecting rod 4 .

[0060] It is understandable that, after the piston 3 is installed in the cylinder body 2, it is necessary to extend out of the cylinder body 2 from the bottom cylinder entry part 13 and retract into the cylinder body 2. A notch 131 is provided on the peripheral wall of the bottom cylinder entry part 13 to ensure that after the piston 3 is installed, the bottom cylinder entry part 13 can be smoothly removed from the bottom of the cylinder body 2 through the deformation of the notch 131. In addition, since the piston 3 and the connecting rod 4 have been installed, the bottom cylinder entry part 13 is sleeved on the connecting rod 4, and the notch 131 can ensure that when the bottom cylinder entry part 13 is disassembled, the bottom cylinder entry part 13 can be removed from the connecting rod 4 through the notch 131.

[0061] In some embodiments, Figure 1 As shown, the inner wall of the bottom cylinder entry member 13 of this embodiment has a boss 132 .

[0062] The boss 132 is disposed at one end of the bottom cylinder entry member 13 facing away from the cylinder body 2 .

[0063] It is understandable that the inner diameter of the boss 132 of the present embodiment is smaller than the inner hole of the piston 3, so that when the air ring 311 and the oil ring 312 at the bottom of the piston 3 extend and retract in the bottom cylinder part 13, the piston 3 will not be detached from the bottom cylinder part 13, and the boss 132 strengthens the strength of the bottom cylinder part 13, thereby ensuring the stability and elasticity of the bottom cylinder part 13.

[0064] In a second aspect, in some embodiments, as Fig.14As shown, this embodiment provides a method for assembling a piston connecting rod of a two-stroke horizontally opposed engine into a cylinder by using a piston connecting rod into cylinder tooling, comprising the following steps: Step 1411, assemble the connecting rods of the first and third cylinders to the connecting rod shaft diameter position of the first and third cylinders of the crankshaft.

[0065] Step 1412, assemble and secure the second four-cylinder block to the second side of the casing.

[0066] Step 1413, based on the top cylinder entry parts, install the piston connecting rod assembly of the second and fourth cylinders into the second and fourth cylinder bodies from the top of the second and fourth cylinder bodies.

[0067] Step 1414, based on the top cylinder entry part and the bottom cylinder entry part, assemble the pistons of the first and third cylinders into a three-cylinder body.

[0068] Step 1415, install a three-cylinder body equipped with one and three-cylinder pistons into the first side of the casing, and connect the one and three-cylinder pistons with the one and three-cylinder connecting rods.

[0069] It is understandable that since the one-three cylinder block and the two-four cylinder block are arranged opposite to each other on both sides of the casing, when the connecting rod is installed into one end of the cylinder block, it is necessary to use the connecting rod cover from the other end of the cylinder block to fix the connecting rod and the crankshaft. The installation of the connecting rod and the connecting rod cover requires operating space, and the large size of the piston will hinder the installation of the connecting rod cover. Therefore, it is impossible to install the connecting rod and piston of the one-three cylinders and the two-four cylinders before installing them into the cylinder block. It is necessary to install the connecting rod of the one-three cylinders first, then install the connecting rod and piston assembly of the two-four cylinders, and finally install the piston of the one-three cylinders to ensure the smooth installation of the connecting rod cover.

[0070] To install the piston and connecting rod, it is necessary to connect the connecting rod and the piston pin hole through the piston pin, and install the retaining ring and plug.

[0071] like Figure 5 As shown, when the connecting rods 41 of the first and third cylinders are assembled to the connecting rod axial diameter position of the first and third cylinders of the crankshaft, since the cylinder body has not been installed on the casing 5 at this time, there is sufficient installation space to facilitate the installation of the connecting rods 41 of the first and third cylinders and the connecting rod covers 411 of the first and third cylinders. At this time, the connecting rods 41 of the first and third cylinders are installed on the crankshaft.

[0072] like Figure 6 and Figure 7As shown, then, the 24-cylinder body 22 is installed on the second side of the casing 5, and the pistons 32 of the 24-cylinder and the connecting rods 42 of the 24-cylinder are assembled to form a piston-connecting rod assembly, and the piston-connecting rod assembly of the 24-cylinder body 22 is installed into the 24-cylinder body 22 from the top of the 24-cylinder body 22 through the top cylinder member 12. Since the 13-cylinder body 21 is only installed with the connecting rods 41 of the 14-cylinder and the 13-cylinder, there is enough installation space for the connecting rods 42 of the 24-cylinder and the connecting rod covers 421 of the 24-cylinder, the engine is turned over by the turning frame 112, and the connecting rod covers 421 of the 24-cylinder and the 13-cylinder are installed from the side of the 13-cylinder body 21, and the connecting rod bolts of the 24-cylinder are used to fix them, so that the connecting rods 42 of the 24-cylinder and the crankshaft are smoothly assembled.

[0073] The pistons of the first and third cylinders are installed into a three-cylinder body through the top cylinder entry part and the bottom cylinder entry part, and the three-cylinder body equipped with the pistons of the first and third cylinders is installed into the first side of the casing, and the pistons of the first and third cylinders are connected with the connecting rods of the first and third cylinders. Since the piston connecting rods of the second and fourth cylinders are assembled with the crankshaft after being connected and fixed, the connecting rods of the first and third cylinders are also assembled with the crankshaft. It is only necessary to complete the connection between the pistons of the first and third cylinders and the connecting rods of the first and third cylinders, and to fix and assemble the three-cylinder body with the casing to complete the entire installation work. The assembly method implemented in this embodiment makes the assembly process of the engine simple and reliable by combining the method of pistons entering the cylinder from the top and the bottom, and does not need to open process installation holes, thereby improving the assembly quality and installation efficiency of the engine.

[0074] In some embodiments, Fig.15 As shown, the steps of assembling the connecting rods of the first and third cylinders to the connecting rod axial diameter positions of the first and third cylinders of the crankshaft in this embodiment include: Step 1511, assemble the connecting rods of the first and third cylinders to the connecting rod shaft diameter position of the second and fourth cylinders of the crankshaft.

[0075] Step 1512, slide the connecting rods of the first and third cylinders from the axial diameter position of the connecting rods of the second and fourth cylinders on the crankshaft to the axial diameter position of the connecting rods of the first and third cylinders on the crankshaft.

[0076] It is understandable that if Figure 5 and Figure 7 Due to the influence of the position of the piston cooling nozzle, there is a risk of deformation of the cooling nozzle when the connecting rod covers 411 of the first and third cylinders and the connecting rod bolts 412 of the first and third cylinders are assembled and tightened at the first and third connecting rod shaft diameter positions of the crankshaft. Therefore, it is necessary to assemble the connecting rods 41 of the first and third cylinders with the connecting rod covers 411 of the first and third cylinders and the connecting rod bolts 412 of the first and third cylinders on the second and fourth cylinder bodies 22 of the casing 5, and then slide the installed connecting rods 41 of the first and third cylinders to the first and third connecting rod shaft diameter positions, which not only avoids the risk of deformation of the cooling nozzle, but also completes the assembly of the connecting rods 41 of the first and third cylinders and the crankshaft.

[0077] In some embodiments, Fig.16As shown, the steps of assembling the pistons of the first and third cylinders into a three-cylinder body based on the top cylinder entry member and the bottom cylinder entry member in this embodiment include: Step 1611, install the bottom cylinder entry member into the bottom of a three-cylinder body.

[0078] Step 1612, install the top cylinder member into the top of a three-cylinder body.

[0079] Step 1613, install the pistons of the first and third cylinders into the first and third cylinder body through the top cylinder entry piece, and push the pistons of the first and third cylinders until the bottoms of the pistons of the first and third cylinders are stuck in the bottom cylinder entry piece.

[0080] It is understandable that if Figure 8 As shown, two bottom cylinder members 13 are installed at the bottom of a three-cylinder body 21, as shown in FIG. Fig. 9 As shown, the top cylinder entry part 12 is installed on the top of a cylinder of a three-cylinder body 21, and the pistons 31 of the first and third cylinders are installed into the cylinders from the top cylinder entry part 12 until the oil ring 312 and the gas ring 311 at the bottom of the pistons 31 of the first and third cylinders are completely stuck in the bottom cylinder entry part 13, and then the top cylinder entry part 12 is removed from one cylinder and installed on the top of another cylinder, and the other piston is installed into the cylinder.

[0081] The installation steps of this embodiment can install the pistons of the first and third cylinders from the top of the first and third cylinder bodies, and fix the pistons in the bottom cylinder parts, thereby improving the installation efficiency of the pistons into the cylinders. In addition, the pistons can be limited from the bottom of the cylinder body to facilitate the assembly of the pistons and connecting rods in the next step.

[0082] In some embodiments, Fig.17 As shown, the steps of installing a three-cylinder body equipped with a first and a third-cylinder piston into the first side of the casing and connecting the first and the third-cylinder pistons with the first and the third-cylinder connecting rods of the embodiment include: Step 1711, install a three-cylinder body on the first side of the casing, and ensure that the bottom of the three-cylinder body is spaced a preset distance from the mounting surface of the casing.

[0083] Step 1712, connecting the first and third cylinder pistons with the first and third cylinder connecting rods within a preset distance.

[0084] Step 1713, remove the bottom cylinder entry member, and push the three-cylinder body until the three-cylinder body fits the casing mounting surface.

[0085] It is understandable that if Fig.10As shown, since the assembly of the connecting rod and the piston requires fixing the connecting rod and the piston pin hole by means of a piston pin 313, and the piston pin 313 hole is provided on the piston, if the piston cannot expose the piston pin hole in the cylinder body, the piston and the connecting rod cannot be installed. Therefore, when installing the connecting rod and the piston, it is necessary to first install a three-cylinder body 21 on one side of the casing 5, and the three-cylinder body 21 and the mounting surface of the casing 5 are spaced apart by a preset distance, and this spacing distance allows a gap to be provided between the casing 5 and the three-cylinder body 21, which can be used for the installation and connection of the piston and the connecting rod.

[0086] In order to ensure that the three-cylinder body 21 and the casing 5 remain stable under the premise of being separated by a preset distance, the three-cylinder body 21 and the casing 5 are supported by connecting bolts 6. Specifically, the preset distance is ensured to be 130±5 mm.

[0087] like Fig.11 As shown, the connection between the pistons 31 of the first and third cylinders and the connecting rods 41 of the first and third cylinders is completed in the gap between the first and third cylinder block 21 and the casing 5. Since the pistons 31 of the first and third cylinders and the connecting rods 41 of the first and third cylinders are assembled outside the first and third cylinder block 21, it is not necessary to open a mounting process hole on the cylinder block for the installation of the piston pin, thereby simplifying the design and processing of the cylinder block and optimizing the cooling effect of the cylinder block.

[0088] like Fig.13 As shown, after the installation of the pistons 31 of the first and third cylinders and the connecting rods 41 of the first and third cylinders is completed, the first and third cylinder body 21 is pushed toward the installation surface of the casing 5 until the pistons 31 of the first and third cylinders are all inserted into the cylinders. Since the pistons 31 of the first and third cylinders and the connecting rods 41 of the first and third cylinders have been installed, the bottom cylinder entry member 13 is now sleeved on the outside of the connecting rods 41 of the first and third cylinders, the notch 131 is aligned with the connecting rods 41 of the first and third cylinders, the bottom cylinder entry member 13 is removed, and then the first and third cylinder body 21 is pushed until the first and third cylinder body 21 is in contact with the installation surface of the casing 5, and the installation of the first and third cylinder body 21 and the casing 5 is completed.

[0089] The installation steps of this embodiment are to complete the installation of the pistons and connecting rods of the first and third cylinders by changing the relative position of the bottom of the pistons of the first and third cylinders and the first and third cylinder body without opening process holes. The installation concept is ingenious and the installation steps are simple, thereby improving the installation efficiency.

[0090] In some embodiments, Fig.18 As shown, the steps of connecting the first and third cylinder pistons with the first and third cylinder connecting rods within a preset distance in this embodiment include: Step 1811, push the first and third cylinder pistons and the bottom cylinder entry member along the direction close to the mounting surface of the casing until the piston pin hole is exposed in the first and third cylinder body.

[0091] Step 1812, connecting the pistons of the first and third cylinders with the connecting rods of the first and third cylinders through the piston pin holes.

[0092] It is understandable that if Fig.11 As shown, the pistons 31 of the first and third cylinders and the bottom cylinder member 13 are pushed to expose the piston pin hole in the first and third cylinder body 21. At this time, the pistons 31 of the first and third cylinders and the connecting rods 41 of the first and third cylinders can be positioned through the piston pin hole, as shown in FIG. Fig.12 As shown, the piston pin 313 is inserted into the pin hole, and the retaining ring 314 and the plug 315 are installed in sequence until the pistons 31 of the first and third cylinders and the connecting rods 41 of the first and third cylinders are relatively fixed.

[0093] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A two-stroke horizontally opposed engine piston connecting rod cylinder tooling, characterized in that: include: A bearing member, a top cylinder entry member and a bottom cylinder entry member; The bearing member comprises a chassis and a turning frame, wherein the turning frame is used to bear the engine cylinder block, and the turning frame is rotatably arranged on the chassis; The top cylinder entry member is provided in a cylindrical shape and is installed on the top of the cylinder body. The top cylinder entry member is used to compress the piston ring so as to install the piston or the piston connecting rod assembly into the cylinder body from the top of the cylinder body; The bottom cylinder entry member is arranged in a ring shape and is installed at the bottom of the cylinder body. The bottom cylinder entry member is used to compress the piston ring to ensure that part of the piston can extend and retract from the bottom of the cylinder body and constrain the piston in the bottom cylinder entry member.

2. The two-stroke horizontally opposed engine piston connecting rod cylinder tooling according to claim 1, characterized in that: Along the axial direction of the top cylinder entry member, from an end away from the cylinder body to an end close to the cylinder body, the inner wall of the top cylinder entry member gradually shrinks.

3. The two-stroke horizontally opposed engine piston connecting rod cylinder tooling according to claim 2, characterized in that: The top cylinder entry member has a sharp corner at one end close to the cylinder body; The pointed corner is matched with a groove at one end of the cylinder body close to the top cylinder entry part, so that the joint surface after the top cylinder entry part and the cylinder body are assembled presents a smooth transition.

4. The two-stroke horizontally opposed engine piston connecting rod cylinder tooling according to claim 1, characterized in that: The peripheral wall of the bottom cylinder entry member has a notch; The width of the notch is greater than the width of the connecting rod.

5. The two-stroke horizontally opposed engine piston connecting rod cylinder tooling according to claim 4, characterized in that: The inner wall of the bottom cylinder entry member has a boss; The boss is arranged at one end of the bottom cylinder entry member away from the cylinder body.

6. A method for assembling a piston connecting rod of a two-stroke horizontally opposed engine into a cylinder by using the piston connecting rod cylinder insertion tooling of any one of claims 1 to 5, characterized in that: include: Assemble the connecting rods of the first and third cylinders to the connecting rod shaft diameter position of the first and third cylinders of the crankshaft; Assemble and secure the two-four cylinder block to the second side of the casing; Based on the top cylinder entry parts, install the piston connecting rod assembly of the second and fourth cylinders into the second and fourth cylinder bodies from the top of the second and fourth cylinder bodies; Based on the top cylinder entry and the bottom cylinder entry, assemble the pistons of the first and third cylinders into a three-cylinder body; A three-cylinder body equipped with one-cylinder and three-cylinder pistons is installed into the first side of the casing, and the pistons of the one-cylinder and three-cylinder are connected with the connecting rods of the one-cylinder and three-cylinder.

7. The assembly method according to claim 6, characterized in that: The step of assembling the connecting rods of the first and third cylinders to the connecting rod axial diameter positions of the first and third cylinders of the crankshaft comprises: Assemble the connecting rods of the first and third cylinders to the connecting rod shaft diameter position of the second and fourth cylinders of the crankshaft; Slide the connecting rods of the first and third cylinders from the connecting rod shaft diameter position of the second and fourth cylinders on the crankshaft to the connecting rod shaft diameter position of the first and third cylinders on the crankshaft.

8. The assembly method according to claim 6, characterized in that: The step of assembling the pistons of the first and third cylinders into a three-cylinder body based on the top cylinder entry member and the bottom cylinder entry member comprises: Install the bottom cylinder fitting into the bottom of a three-cylinder body; Install the top cylinder fitting into the top of a three-cylinder body; Install the pistons of the first and third cylinders into the body of the first and third cylinders through the top cylinder entry piece, and push the pistons of the first and third cylinders until the bottoms of the pistons of the first and third cylinders are stuck in the bottom cylinder entry piece.

9. The assembly method according to claim 6, characterized in that: The step of installing a three-cylinder body with a first and a third-cylinder piston installed into the first side of the casing, and connecting the first and the third-cylinder pistons with the first and the third-cylinder connecting rods comprises: Mounting a three-cylinder block on a first side of the receiver and ensuring that a bottom of the three-cylinder block is spaced a preset distance from a mounting surface of the receiver; Connect the pistons of the first and third cylinders with the connecting rods of the first and third cylinders within a preset distance; Remove the bottom entry piece and push the three-cylinder block until the three-cylinder block fits against the mounting surface of the casing.

10. The assembly method according to claim 9, characterized in that: The step of connecting the first and third cylinder pistons with the first and third cylinder connecting rods within a preset distance includes: Push the pistons of the first and third cylinders and the bottom cylinder entry parts in the direction close to the mounting surface of the casing until the piston pin hole is exposed in the first and third cylinder body; Connect the pistons of the first and third cylinders with the connecting rods of the first and third cylinders through the piston pin hole.

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