Methanol engine main bearing cover with auxiliary connecting structure

Abstract

The utility model discloses a methanol engine main bearing cap with an auxiliary connecting structure, which relates to the technical field of methanol engines and comprises a main bearing cap body, a mounting hole and a positioning pin hole are arranged inside two sides of the main bearing cap body, a crankshaft hole and an identification bump are respectively formed at the bottom and the top end of the main bearing cap body, and the auxiliary connecting structure is arranged in the crankshaft hole. A mounting bottom frame is arranged below the main bearing cover body; the main bearing cover body is fixedly connected to the top end of the mounting bottom frame through two screws, and a stabilizing assembly is arranged at the top ends of the two screws. According to the methanol engine main bearing cover with the auxiliary connecting structure, the stabilizing assembly is arranged, a sliding clamping block is clamped to the inner side of a square groove, a limiting connecting rod and two screws can be limited and fixed, and therefore the screws are prevented from rotating and falling off in the long-term use process; and the two adjacent main bearing cover bodies are connected in a pressing manner, so that the overall mounting stability is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of methanol engines, in particular to a main bearing cover of a methanol engine provided with an auxiliary connection structure. Background Art

[0002] Methanol fuel engine is an internal combustion engine that uses methanol as the main fuel. It has the advantages of relatively small changes to the original engine, less pollution to the atmospheric environment, and the use of petroleum storage and transportation systems as liquid fuel. Therefore, it is widely used in various fields such as transportation, agricultural machinery, and engineering machinery. Among them, when the methanol engine is in use, it needs to be equipped with an engine main bearing cap, which is an important component to ensure the normal operation of the crankshaft and power output. The lack of a main bearing cap will cause the bearing to be easily damaged, but the existing methanol engine main bearing cap still has certain defects when in use;

[0003] For example, an engine main bearing cap and an engine with announcement number CN218235863U, by arranging two locating pin holes on the same side of the line connecting the center lines of the two mounting holes, that is, the locating pin holes are two locating pin holes with offset positions relative to the mounting holes, so that when the installation orientation of the main bearing cap body is correct, when the two locating pin holes are aligned with the two locating pins on the engine cylinder block and inserted, the two mounting holes can be aligned with the mounting positions on the engine cylinder block; and when the installation orientation of the main bearing cap body is incorrect, it is rotated 180 degrees and installed upside down, when the two locating pin holes are aligned with the two locating pins on the engine cylinder block and inserted, the two mounting holes will not be able to align with the mounting positions on the engine cylinder block, and the connection between the main bearing cap body and the engine cylinder block cannot be achieved;

[0004] In the actual use of the main bearing cap of the methanol engine, two screws are required to fix the main bearing cap on the surface of the engine cylinder block through two mounting holes respectively. However, the screws are prone to loosening and falling off during the long-term use of the engine, which leads to the instability of the main bearing cap installation.

[0005] In view of the above problems, it is urgent to carry out innovative design based on the original equipment. Therefore, we propose a methanol engine main bearing cover with an auxiliary connection structure that can well solve the above problems. Utility Model Content

[0006] The purpose of the utility model is to provide a methanol engine main bearing cover with an auxiliary connection structure to solve the problem proposed in the above-mentioned background technology that in the actual use of the main bearing cover of the methanol engine, two screws are needed to fix the main bearing cover on the surface of the engine cylinder body through two mounting holes respectively, but the screws are prone to loosening and falling off during the long-term use of the engine, which leads to the problem of unstable installation of the main bearing cover.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a methanol engine main bearing cap with an auxiliary connection structure, comprising a main bearing cap body, symmetrically distributed mounting holes and positioning pin holes are opened inside the two sides of the main bearing cap body, a crankshaft hole and an identification convex block are formed at the bottom and top of the main bearing cap body respectively, a mounting frame is arranged below the main bearing cap body, and a main bearing body is clamped at the top of the mounting frame and the inner side of the crankshaft hole;

[0008] The main bearing cover body is fixedly connected to the top of the mounting base by two screws passing through the mounting holes, and a stabilizing component is arranged on the top of the two screws, and the stabilizing component includes a limit connecting rod connected to the top of the two screws for common rotation, and limit rings are formed at the bottom ends of both sides of the limit connecting rod, and the two limit rings are limitedly rotated on the inner sides of the two screws, and the outer walls of both sides of the limit connecting rod are fixedly connected with a fixing ring, and the bottom end of the fixing ring is fixedly connected with a first spring around the outer side of the limit connecting rod, and the bottom end of the first spring is fixedly connected with a sliding block, and the sliding block slides vertically on the outer side of the limit connecting rod, and a square groove is opened on the top of the screw. The bottom end of the sliding block is clamped on the inner side of the square groove, and the top end of the screw is rotatably connected with a rotating block, and the rotating block is clamped on the top end of the sliding block. By clamping the sliding block on the inner side of the square groove, the limit connecting rod and the two screws can be limited and fixed, thereby preventing the screws from rotating and falling off during long-term use. When the screws need to be removed, it is only necessary to rotate the rotating block to the top of the sliding block. The first spring drives the sliding block to move upward to disengage from the square groove under the rebound action, and the limit connecting rod loses the limit connection of the square groove. The limit connecting rod can rotate freely along the limit ring and the screw, thereby facilitating the rotation and disassembly of the two screws and the main bearing cover body.

[0009] Preferably, a semicircular mounting groove is provided at the top of the mounting base, and the main bearing body is located inside the circular area formed by the mounting groove and the crankshaft hole, so as to realize the stable installation of the main bearing body. The top of the mounting base is fixedly connected with symmetrically distributed positioning pins on both sides of the mounting groove, and the setting positions of the two positioning pins correspond to the opening positions of the two positioning pin holes on the main bearing cover. The corresponding engagement of the two offset positioning pins with the positioning pin holes can effectively prevent the main bearing cover from being installed upside down.

[0010] Preferably, the bottom end of the main bearing cover body is located on the edge of the crankshaft hole and is provided with a plurality of circumferentially distributed spherical grooves, the inner side of each of the spherical grooves is rotatably connected to a ball, and the portion of the ball exposed outside the spherical groove is against the main bearing body. The arrangement of the ball can reduce the friction of the rotation while firmly installing the main bearing body, thereby playing a protective role.

[0011] Preferably, fixed pressure blocks are fixedly connected to both sides of the bottom of one end of the main bearing cover body, and rotating pressure blocks are arranged on both sides of the bottom of the other end, and the bottom end surface of the rotating pressure block is flush with the top end surface of the fixed pressure block. Through the arrangement of the fixed pressure block and the rotating pressure block, when several main bearing cover bodies are installed side by side above the mounting base, the fixed pressure blocks and rotating pressure blocks at one end of two adjacent main bearing cover bodies will overlap and be crimped up and down, thereby increasing the overall installation stability of the main bearing cover body.

[0012] Preferably, receiving grooves are provided on both sides of the bottom of one end of the main bearing cover body, and the rotating pressure block is rotatably connected to the inner side of the receiving groove through a connecting rod fixedly connected at both ends, and one side of the connecting rod passes through the outer side of the main bearing cover body and is fixedly connected with a knob, and the angle of the rotating pressure block can be adjusted by rotating the knob. When the rotating pressure block is in a horizontal state, it can be crimped onto the top of the fixed pressure block of the adjacent main bearing cover body to stabilize the whole. When the rotating pressure block is rotated to a vertical state, it will be received into the interior of the receiving groove to release the crimping of the fixed pressure block to facilitate the separate disassembly of each main bearing cover body.

[0013] Preferably, a clamping assembly is provided on one side of the knob, and the clamping assembly includes a right-angled groove opened on the knob, and the side walls of the two sides of the main bearing cover body are fixedly connected with a fixing seat, and the inner side of the fixing seat is slidably connected with a sliding clamping rod, one end of the sliding clamping rod is inserted into the inner side of the right-angled groove, and a second spring is fixedly connected between one end of the sliding clamping rod and the inner wall of one end of the fixing seat, and the angle of the knob and the rotating pressure block can be fixed by pushing the sliding clamping rod to be inserted into the inner side of the right-angled groove through the second spring.

[0014] Preferably, the top and bottom ends of the sliding card rod are formed with symmetrically distributed limiting parts, and the inner walls of the top and bottom ends of the fixed seat are provided with limiting sliding grooves, and the two limiting parts slide on the inner sides of the corresponding limiting sliding grooves to ensure the stability of the sliding card rod sliding along the fixed seat.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows: the main bearing cap of the methanol engine provided with the auxiliary connection structure can limit and fix the limit connecting rod and the two screws by setting a stabilizing component and using a sliding clamping block to be clamped on the inner side of the square groove, thereby preventing the screws from rotating and falling off during long-term use. By setting a fixed pressing block and a rotating pressing block, two adjacent main bearing cap bodies are pressed against each other, thereby increasing the overall installation stability. The specific contents are as follows:

[0016] (1) By providing a stabilizing component and using a sliding block to clamp the inner side of the square groove, the limit connecting rod and the two screws can be fixed in position, thereby preventing the screws from rotating and falling off during long-term use. When the screws need to be removed, the rotating block only needs to be rotated to the top of the sliding block. The first spring drives the sliding block to move upward to escape from the square groove under the rebound action. At this time, the limit connecting rod can rotate freely along the limit ring and the screw, thereby facilitating the rotation and removal of the two screws and the main bearing cover body;

[0017] (2) A plurality of circumferentially distributed spherical grooves and freely rotatable balls inside the grooves are provided on the inner edge of the crankshaft hole, and the portions of the balls exposed outside the spherical grooves are against the main bearing body. This can reduce the friction of the main bearing body while firmly installing the main bearing body, thereby playing a protective role;

[0018] (3) A fixed pressure block and a rotating pressure block are respectively arranged at the bottom of both ends of the main bearing cover body, and the bottom end surface of the rotating pressure block is flush with the top end surface of the fixed pressure block. When a plurality of main bearing cover bodies are installed side by side on the mounting frame, the fixed pressure blocks and the rotating pressure blocks at one end of two adjacent main bearing cover bodies will overlap and press together, thereby increasing the overall installation stability of the main bearing cover body;

[0019] (4) By providing a receiving groove for accommodating the rotating pressure block on the main bearing cover, the rotating pressure block can be accommodated in the receiving groove by simply rotating the knob, thereby releasing the pressing connection between the rotating pressure block and the fixed pressure block, so that each main bearing cover can be disassembled separately;

[0020] (5) By opening a right-angle groove on the knob and setting a clamping assembly on one side thereof, and using a second spring to push the sliding clamping rod to be inserted into the inner side of the right-angle groove, the angle of the knob and the rotating pressure block can be fixed, thereby increasing the crimping stability of the rotating pressure block and the fixed pressure block, and the rotating pressure block can also be fixedly received in the accommodating groove to facilitate the sequential disassembly of each main bearing cover body. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0022] Figure 2 It is a schematic diagram of the cross-section structure of the main bearing cover and the main bearing body of the utility model;

[0023] Figure 3 It is a bottom view structural diagram of the main bearing cover of the utility model;

[0024] Figure 4 It is a schematic diagram of a partially cutaway structure of a stabilizing component of the utility model;

[0025] Figure 5 For this utility model Figure 4 The enlarged structural diagram at A in the middle;

[0026] Figure 6 It is a structural schematic diagram of the fixed pressing block and the rotating pressing block of the utility model.

[0027] Figure 7 For this utility model Figure 6 Enlarged structural diagram at B in the middle.

[0028] In the figure: 1. main bearing cover; 2. mounting hole; 3. locating pin hole; 4. crankshaft hole; 5. identification protrusion; 6. mounting base; 7. main bearing body; 8. screw; 9. limit connecting rod; 10. limit ring; 11. fixing ring; 12. first spring; 13. sliding block; 14. square groove; 15. rotating block; 16. spherical groove; 17. ball; 18. fixed pressure block; 19. receiving groove; 20. rotating pressure block; 21. connecting rod; 22. knob; 23. right angle groove; 24. fixing seat; 25. sliding card rod; 26. second spring; 27. limit part; 28. limit slide groove. DETAILED DESCRIPTION

[0029] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0030] Example 1: Please refer to Figure 1-Figure 7 The present invention provides the following technical solutions: A methanol engine main bearing cover with an auxiliary connection structure, comprising a main bearing cover body 1, symmetrically distributed mounting holes 2 and positioning pin holes 3 are opened inside the two sides of the main bearing cover body 1, a crankshaft hole 4 and an identification convex block 5 are respectively formed at the bottom and the top of the main bearing cover body 1, a mounting frame 6 is arranged below the main bearing cover body 1, and a main bearing body 7 is clamped with the top of the mounting frame 6 and the inner side of the crankshaft hole 4, wherein a semicircular mounting groove is opened at the top of the mounting frame 6, and the main bearing body 7 is located inside the circular area formed by the mounting groove and the crankshaft hole 4 to achieve a stable installation of the main bearing body 7, and the top of the mounting frame 6 is fixedly connected with symmetrically distributed positioning pins on both sides of the mounting groove, and the setting positions of the two positioning pins correspond to the opening positions of the two positioning pin holes 3 on the main bearing cover body 1. The corresponding clamping of the two offset positioning pins and the positioning pin holes 3 can effectively prevent the main bearing cover body 1 from being installed upside down;

[0031] In addition, the bottom end of the main bearing cover 1 is located at the edge of the crankshaft hole 4 and is provided with a plurality of circumferentially distributed spherical grooves 16. A ball 17 is rotatably connected to the inner side of each spherical groove 16. The part of the ball 17 exposed outside the spherical groove 16 abuts against the main bearing body 7. The arrangement of the ball 17 can reduce the friction of the rotation of the main bearing body 7 while firmly installing the main bearing body 7, thereby playing a protective role.

[0032] The main bearing cover body 1 is fixedly connected to the top of the mounting base 6 by two screws 8 passing through the mounting holes 2. A stabilizing component is provided at the top of the two screws 8. The stabilizing component includes a limit link 9 that is rotatably connected to the top of the two screws 8. Limiting rings 10 are formed at the bottom ends of both sides of the limit link 9. The two limiting rings 10 are limitedly rotated on the inner sides of the two screws 8. The outer walls of both sides of the limit link 9 are fixedly connected with a fixing ring 11. The bottom end of the fixing ring 11 is fixedly connected with a first spring 12 around the outer side of the limit link 9. The bottom end of the first spring 12 is fixedly connected with a sliding block 13. The sliding block 13 slides on the outer side of the limit link 9. It should be particularly noted that a convex strip and a groove are provided between the sliding block 13 and the limit link 9 to enable the two to slide in a limited manner, that is, the sliding block 13 can only slide up and down along the limit link 9. The top of the screw 8 is provided with a square groove 14, and the bottom end of the sliding block 13 is clamped on the inner side of the square groove 14. The top of the screw 8 is rotatably connected with a rotating block 15, and the rotating block 15 is clamped on the top of the sliding block 13. By clamping the sliding block 13 on the inner side of the square groove 14, the limit connecting rod 9 and the two screws 8 can be limited and fixed, thereby preventing the screw 8 from rotating and falling off during long-term use. When the screw 8 needs to be removed, it is only necessary to rotate the rotating block 15 to the top of the sliding block 13. The first spring 12 drives the sliding block 13 to move upward to disengage from the square groove 14 under the action of rebound, and the limiting connecting rod 9 can be freely rotated along the limiting ring 10 with the screw 8, thereby facilitating the rotation and disassembly of the two screws 8 and the main bearing cover body 1.

[0033] Embodiment 2:

[0034] On the basis of the first embodiment, fixed pressure blocks 18 are fixedly connected to both sides of the bottom of one end of the main bearing cover body 1, and rotating pressure blocks 20 are arranged on both sides of the bottom of the other end. The bottom end surface of the rotating pressure block 20 is flush with the top end surface of the fixed pressure block 18. Through the arrangement of the fixed pressure block 18 and the rotating pressure block 20, when a plurality of main bearing cover bodies 1 are installed side by side on the mounting base 6, the fixed pressure blocks 18 and the rotating pressure blocks 20 at one end of two adjacent main bearing cover bodies 1 will overlap and press together, thereby increasing the overall installation stability of the main bearing cover body 1. The bottom of one end of the main bearing cover body 1 is provided with a receiving groove 1 on both sides. 9. The rotating pressing block 20 is rotatably connected to the inner side of the receiving groove 19 through the connecting rod 21 fixedly connected at both ends. One side of the connecting rod 21 penetrates to the outer side of the main bearing cover 1 and is fixedly connected with a knob 22. The angle of the rotating pressing block 20 can be adjusted by rotating the knob 22. When the rotating pressing block 20 is in a horizontal state, it can be pressed on the upper side of the fixed pressing block 18 of the adjacent main bearing cover 1 to stabilize the whole. When the rotating pressing block 20 is rotated to a vertical state, it will be received in the receiving groove 19 to release the crimping of the fixed pressing block 18 to facilitate the separate disassembly of each main bearing cover 1.

[0035] A clamping assembly is provided on one side of the knob 22, and the clamping assembly includes a right-angled groove 23 opened on the knob 22. The side walls of the main bearing cover body 1 are fixedly connected with a fixed seat 24, and the inner side of the fixed seat 24 is slidably connected with a sliding clamping rod 25. Specifically, the top and bottom ends of the sliding clamping rod 25 are formed with symmetrically distributed limiting parts 27, and the inner walls of the top and bottom ends of the fixed seat 24 are provided with limiting sliding grooves 28. The two limiting parts 27 slide on the inner sides of the corresponding limiting sliding grooves 28 to ensure the stability of the sliding clamping rod 25 sliding along the fixed seat 24. One end of the sliding clamping rod 25 is inserted into the inner side of the right-angled groove 23, and a second spring 26 is fixedly connected between one end of the sliding clamping rod 25 and the inner wall of one end of the fixed seat 24. The second spring 26 pushes the sliding clamping rod 25 to be inserted into the inner side of the right-angled groove 23, so that the angle of the knob 22 and the rotating pressure block 20 can be fixed.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A methanol engine main bearing cap provided with an auxiliary connection structure, comprising a main bearing cap body (1), symmetrically distributed mounting holes (2) and positioning pin holes (3) are provided inside the two sides of the main bearing cap body (1), a crankshaft hole (4) and an identification convex block (5) are respectively formed at the bottom and top of the main bearing cap body (1), a mounting frame (6) is provided below the main bearing cap body (1), and a main bearing body (7) is clamped between the top of the mounting frame (6) and the inner side of the crankshaft hole (4); Features: The main bearing cover (1) is fixedly connected to the top of the mounting frame (6) by two screws (8) passing through the mounting holes (2); the tops of the two screws (8) are provided with a stabilizing assembly, the stabilizing assembly comprising a limit connecting rod (9) rotatably connected to the tops of the two screws (8); limit rings (10) are formed at the bottom ends of both sides of the limit connecting rod (9); the two limit rings (10) are limitedly rotated on the inner sides of the two screws (8); the outer walls of both sides of the limit connecting rod (9) are fixedly connected with fixing rings (11); the fixing rings (11) are fixedly connected to the tops of the two screws (8); The bottom end of the ring (11) is fixedly connected with a first spring (12) around the outer side of the limiting connecting rod (9); the bottom end of the first spring (12) is fixedly connected with a sliding block (13); the sliding block (13) vertically slides on the outer side of the limiting connecting rod (9); the top end of the screw (8) is provided with a square groove (14); the bottom end of the sliding block (13) is clamped on the inner side of the square groove (14); the top end of the screw (8) is rotatably connected with a rotating block (15); the rotating block (15) is clamped on the top end of the sliding block (13).

2. A methanol engine main bearing cap with an auxiliary connection structure according to claim 1, characterized in that: A semicircular mounting groove is provided at the top of the mounting base (6), and the main bearing body (7) is located inside a circular area formed by the mounting groove and the crankshaft hole (4). The top of the mounting base (6) is fixedly connected to symmetrically distributed positioning pins on both sides of the mounting groove, and the arrangement positions of the two positioning pins correspond to the opening positions of the two positioning pin holes (3) on the main bearing cover (1).

3. A methanol engine main bearing cap with an auxiliary connection structure according to claim 1, characterized in that: The bottom end of the main bearing cover (1) is located at the edge of the crankshaft hole (4) and is provided with a plurality of circumferentially distributed spherical grooves (16); the inner side of each spherical groove (16) is rotatably connected to a ball (17); the portion of the ball (17) exposed outside the spherical groove (16) abuts against the main bearing body (7).

4. A methanol engine main bearing cap with an auxiliary connection structure according to claim 1, characterized in that: Fixed pressure blocks (18) are fixedly connected to both sides of the bottom of one end of the main bearing cover (1), and rotating pressure blocks (20) are arranged on both sides of the bottom of the other end, and the bottom end surface of the rotating pressure block (20) is flush with the top end surface of the fixed pressure block (18).

5. A methanol engine main bearing cap with an auxiliary connection structure according to claim 4, characterized in that: The bottom of one end of the main bearing cover body (1) is provided with receiving grooves (19) on both sides, and the rotating pressure block (20) is rotatably connected to the inner side of the receiving groove (19) via a connecting rod (21) fixedly connected at both ends, and one side of the connecting rod (21) passes through the outer side of the main bearing cover body (1) and is fixedly connected to a knob (22).

6. A methanol engine main bearing cap with an auxiliary connection structure according to claim 5, characterized in that: A clamping assembly is provided on one side of the knob (22), and the clamping assembly comprises a right-angle groove (23) formed on the knob (22). The side walls on both sides of the main bearing cover (1) are fixedly connected with a fixing seat (24), and a sliding clamping rod (25) is slidably connected to the inner side of the fixing seat (24). One end of the sliding clamping rod (25) is inserted into the inner side of the right-angle groove (23), and a second spring (26) is fixedly connected between one end of the sliding clamping rod (25) and the inner wall of one end of the fixing seat (24).

7. A methanol engine main bearing cap with an auxiliary connection structure according to claim 6, characterized in that: The top and bottom ends of the sliding clamp rod (25) are formed with symmetrically distributed limiting portions (27), and the inner walls of the top and bottom ends of the fixing seat (24) are provided with limiting sliding grooves (28), and the two limiting portions (27) slide on the inner sides of the corresponding limiting sliding grooves (28).

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