An automobile engine housing positioning and assembling device

Abstract

The present application relates to the technical field of assembling machinery, in particular to an automobile engine shell positioning and assembling device, which comprises an assembling table and an engine shell, the shell is provided with a cylinder hole for installing a cylinder, the top of the assembling table is provided with an oil injection structure before assembling, the oil injection structure is used for injecting lubricating oil into the inside of the cylinder hole, the side of the assembling table is provided with a positioning structure for the shell during assembling, the oil injection structure is linked with the positioning structure, a low-speed motor drives a cam to periodically trigger a No. 1 movable rod, and then drives a rack and pinion linkage, so that the oil tank automatically drops and the oil drain pipe is inserted into the inside of the cylinder hole, the drive motor drives the oil drain pipe to rotate for one circle, the uniform oil injection to the inner wall of the cylinder hole is realized, the problems such as inconsistent oil injection amount and lubrication position deviation caused by manual operation are avoided, the oil injection efficiency and lubrication quality are significantly improved, and the friction damage risk during pressing is effectively reduced.

Description

Technical Field

[0001] This invention relates to the field of assembly machinery technology, and more particularly to machinery for positioning and assembling the housing of an automobile engine. Background Technology

[0002] In the manufacturing process of automobile engines, the assembly between the engine housing and the cylinder is a critical step. Typically, the cylinder is press-fitted to the cylinder bore on the engine housing using an interference fit to ensure a tight and reliable connection. However, in actual assembly, if there is insufficient lubricating medium inside the cylinder bore, dry friction can easily occur during press-fitting, leading to scratches on the mating surfaces, metal shavings, and even deformation or damage to the cylinder or housing, severely affecting assembly quality and service life.

[0003] Currently, traditional assembly methods mostly rely on manual application of lubricating oil into the cylinder bore, resulting in low operational efficiency and difficulty in precisely controlling the amount and location of oil application, easily leading to uneven lubrication or omissions. Furthermore, during assembly, the housing positioning typically relies on simple fixtures or manual alignment, lacking a linkage mechanism with the oiling process. This hinders automation and collaborative operation of the assembly process, further restricting improvements in assembly efficiency and consistency.

[0004] Therefore, developing an assembly machine that can automatically add lubricating oil into the cylinder bore and reliably position the housing is of great significance for improving engine assembly quality, reducing labor intensity, and increasing production efficiency. Summary of the Invention

[0005] The purpose of this invention is to address the problem in the prior art where the positioning of the housing usually relies on simple clamps or manual alignment, lacking a linkage mechanism with the oiling process, making it difficult to achieve automation and collaborative operation of the assembly process, and further restricting the improvement of assembly efficiency and consistency. Therefore, this invention proposes an automotive engine housing positioning and assembly device.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: an automotive engine housing positioning and assembly device, comprising an assembly platform and an engine housing, wherein the housing is provided with a cylinder bore for installing a cylinder, the top of the assembly platform is equipped with a pre-assembly lubrication structure for injecting lubricating oil into the cylinder bore, the side of the assembly platform is provided with a positioning structure for the housing during assembly, the lubrication structure is linked to the positioning structure, and the lubrication structure includes a support plate fixed to the bottom of the assembly platform, on which a low-speed electric motor is mounted. The machine has a cam fixed to the output end of the low-speed motor. A slide groove is provided at the bottom of the assembly table. A first movable rod is slidably connected to the bottom surface of the assembly table along the slide groove. A second spring is provided inside the slide groove and connected to the first movable rod. A support frame is fixed to the side wall of the assembly table. Traction blocks are distributed on the surface of the support frame and the side of the assembly table. A steel rope is connected to the first movable rod. A rack is slidably connected to the support frame along its side wall. A first spring is provided on the side of the support frame and connected to the rack. The steel rope passes through the traction block and is connected to one end of the rack.

[0007] As a further embodiment of the present invention, the oil injection structure further includes an inclined column rotatably connected to the top of the support frame, the top of the inclined column is provided with an inclined groove, and a gear is provided on the outside of the inclined column, the gear meshing with a rack.

[0008] As a further embodiment of the present invention, the oil injection structure further includes a vertical groove provided in the vertical direction of the support frame, an oil tank being slidably connected to the top of the support frame along the vertical groove, a connecting rod being slidably connected to the top of the support frame in the vertical direction, the end of the connecting rod being fixedly connected to the top of the oil tank, the top end of the connecting rod being located inside the inclined groove, and a No. 3 spring being provided on the outside of the connecting rod.

[0009] As a further embodiment of the present invention, the oil filling structure also includes an oil drain pipe connected to the bottom of the oil tank, and a vertical rod is fixed to the top of the support frame. The end of the vertical rod is located inside the oil tank and is fixed with a cover plate.

[0010] As a further embodiment of the present invention, a sealing plug is provided at the bottom of the cover plate, and the sealing plug is inserted into the interior of the oil drain pipe, so that the lubricating oil only enters the interior of the oil drain pipe when the oil tank descends.

[0011] As a further embodiment of the present invention, the oil filling structure further includes a worm gear disposed outside the oil drain pipe, a worm is rotatably connected to the bottom of the oil tank via a support block, the worm gear meshes with the worm, a drive motor is installed at the bottom of the oil tank, the output end of the drive motor is fixedly connected to the worm, and a push-button switch is installed inside the support frame, the push-button switch being connected to the drive motor via a wire.

[0012] As a further embodiment of the present invention, the positioning structure includes a first support rod and a second support rod fixed to the side wall of the assembly table. The first support rod is rotatably connected to a second movable rod via a rotating shaft. A coil spring is provided at the bottom end of the rotating shaft to facilitate the second movable rod's reset after rotation. A pull rod is rotatably connected to the second movable rod. A limit rod is rotatably connected to the second support rod. A locking block is provided at the end of the limit rod. One end of the pull rod is rotatably connected to the limit rod.

[0013] As a further embodiment of the present invention, the positioning structure further includes a third support rod fixed to the bottom of the assembly table, a tension spring connecting the third support rod and the limiting rod, a round shaft rotatably connected to the third support rod, a round disk fixed to the outside of the round shaft, and a round plate fixed to the bottom of the round shaft.

[0014] As a further embodiment of the present invention, the positioning structure further includes a stop bar fixed to the outside of the disc, a notch formed between every two stop bars, and an opening provided on one side of the assembly table to facilitate the rotation of the stop bar.

[0015] As a further embodiment of the present invention, the positioning structure further includes slots distributed on the outside of the circular plate, and the card block cooperates with the slots.

[0016] The automotive engine housing positioning and assembly device proposed in this invention has the following advantages: 1. This invention achieves uniform and automatic lubrication of cylinder bores by setting up an automated lubrication structure composed of components such as a cam, rack, inclined column, oil tank, and oil drain pipe. A low-speed motor drives the cam to periodically trigger the first movable rod, which in turn drives the rack and gear to automatically lower the oil tank and extend the oil drain pipe into the cylinder bore. The drive motor rotates the oil drain pipe one revolution, achieving uniform lubrication of the inner wall of the cylinder bore. This avoids problems such as inconsistent oil volume and lubrication position deviation caused by manual operation, significantly improving lubrication efficiency and lubrication quality, and effectively reducing the risk of friction damage during press fitting.

[0017] 2. This invention achieves automated sequential control of housing fixation, oiling, and assembly completion by setting the positioning structure and oiling structure as a linkage mechanism. After the cam triggers the oiling structure to complete the oiling operation, it also contacts the second movable rod, which drives the locking block to disengage from the slot via the pull rod and limit rod, releasing the restriction on the disc and stop rod. This allows the assembled housing to automatically move out of the locking slot on the inclined platform, while the unassembled housing enters the next locking slot and is re-locked and positioned. This linkage design enables the oiling, assembly, positioning, and transfer processes to operate in tandem. The worker only needs to place the cylinder into the cylinder bore throughout the entire process, greatly reducing manual labor and significantly improving the automation level and production efficiency of the assembly line. Attached Figure Description

[0018] Figure 1This is an external view of the assembly device proposed in this invention; Figure 2 The present invention proposes Figure 1 Display image after changing angle; Figure 3 This is a schematic diagram of the bottom of the assembly platform proposed in this invention; Figure 4 This is a schematic diagram of the linkage between the oil injection structure and the positioning structure proposed in this invention; Figure 5 This is a schematic diagram of the positioning structure proposed in this invention; Figure 6 This is a schematic diagram of the top of the support frame proposed in this invention; Figure 7 The present invention proposes Figure 6 Display image after changing angle; Figure 8 This is a schematic diagram of the interior of the fuel tank proposed in this invention; Figure 9 This is a schematic diagram of the bottom of the fuel tank proposed in this invention.

[0019] The illustrations in the instruction manual are numbered as follows: 1. Assembly table; 2. Housing; 3. Cylinder bore; 4. Support plate; 5. Low-speed motor; 6. Cam; 7. Slide groove; 8. No. 1 moving rod; 9. Support frame; 10. Traction block; 11. Steel rope; 12. Rack; 13. No. 1 spring; 14. Inclined groove; 15. Gear; 16. Vertical groove; 17. Oil tank; 18. Connecting rod; 19. Oil drain pipe; 20. Vertical rod; 21. Cover plate; 22. Worm gear; 23. Support block; 24. 25. Worm gear; 26. Drive motor; 27. Push button switch; 28. Spring No. 2; 29. ​​Support rod No. 1; 30. Support rod No. 2; 31. Movable rod No. 2; 32. Pull rod; 33. Limiting rod; 34. Locking block; 35. Support rod No. 3; 36. Round shaft; 37. Tension spring; 38. Round disc; 39. Round plate; 40. Stop bar; 41. Bayonet; 42. Slot; 43. Opening; 44. Inclined column; 45. Spring No. 3. Detailed Implementation

[0020] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0021] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are used only for the convenience of describing the invention and for 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 invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In the description of this invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installed," "connected," "linked," and "set up" 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 communication of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances. The following describes embodiments of the invention based on its overall structure.

[0022] The present invention proposes an automotive engine housing positioning and assembly device, including an assembly platform 1 and an engine housing 2, wherein the housing 2 is provided with a cylinder bore 3.

[0023] Furthermore, the cylinder bore 3 is used to install the cylinder, and the top of the assembly platform 1 is equipped with an oil injection structure before assembly. The oil injection structure is used to inject lubricating oil into the inside of the cylinder bore 3. The side of the assembly platform 1 is provided with a positioning structure for the housing 2 during assembly. The oil injection structure is linked with the positioning structure.

[0024] Specifically, the oil injection structure includes a support plate 4 fixed to the bottom of the assembly platform 1, a low-speed motor 5 installed on the support plate 4, a cam 6 fixed to the output end of the low-speed motor 5, a slide groove 7 provided at the bottom of the assembly platform 1, a first movable rod 8 slidably connected to the bottom surface of the assembly platform 1 along the slide groove 7, a second spring 27 provided inside the slide groove 7 and connected to the first movable rod 8, the second spring 27 facilitating the first movable rod 8 to return to its original position after rotation.

[0025] Furthermore, a support frame 9 is fixed to the side wall of the assembly table 1, and traction blocks 10 are distributed on the surface of the support frame 9 and the side of the assembly table 1. A steel rope 11 is connected to the first movable rod 8. A rack 12 is slidably connected to the support frame 9 along its side wall. A first spring 13 is provided on the side of the support frame 9 and connected to the rack 12. The steel rope 11 passes through the traction block 10 and is connected to one end of the rack 12.

[0026] Furthermore, the top of the support frame 9 is rotatably connected to an inclined column 43, the top of the inclined column 43 is provided with an inclined groove 14, and a gear 15 is provided on the outside of the inclined column 43, the gear 15 meshing with the rack 12.

[0027] Furthermore, the support frame 9 has a vertical groove 16 extending through itself in the vertical direction, and the top of the support frame 9 is slidably connected to an oil tank 17 along the vertical groove 16, with an oil filling port provided at the top of the oil tank 17.

[0028] Furthermore, a connecting rod 18 is slidably connected to the top of the support frame 9 in the vertical direction. The end of the connecting rod 18 is fixedly connected to the top of the oil tank 17. The top of the connecting rod 18 is located inside the inclined groove 14. A No. 3 spring 44 is provided on the outside of the connecting rod 18. The No. 3 spring 44 facilitates the lifting of the connecting rod 18 and the oil tank 17 to achieve reset.

[0029] Furthermore, the bottom of the oil tank 17 is connected to an oil drain pipe 19, and the top of the support frame 9 is fixed with a vertical rod 20. The end of the vertical rod 20 is located inside the oil tank 17 and is fixed with a cover plate 21. A sealing plug is provided at the bottom of the cover plate 21. The sealing plug is inserted into the inside of the oil drain pipe 19 to facilitate sealing the oil drain pipe 19.

[0030] Furthermore, the present invention provides a worm gear 22 on the outside of the oil drain pipe 19, and a worm 24 is rotatably connected to the bottom of the oil tank 17 via a support block 23. The worm gear 22 meshes with the worm 24, and a drive motor 25 is installed at the bottom of the oil tank 17. The output end of the drive motor 25 is fixedly connected to the worm 24.

[0031] In addition, a push-button switch 26 is installed inside the support frame 9, and the push-button switch 26 is connected to the drive motor 25 via a wire.

[0032] It should be noted that the engine cylinder and the cylinder bore 3 on the engine are interference fit. Before press-fitting, lubricating medium must be added to avoid dry friction scratching the mating surfaces, reduce press-fitting resistance, ensure assembly coaxiality, and form a protective oil film for rust and corrosion prevention, ensuring assembly accuracy and reliability. The oil injection structure of this invention is designed for this purpose, enabling the active addition of lubricating oil to the cylinder bore 3 on the engine before assembly, eliminating the need for manual addition, thus achieving automation and improving assembly efficiency.

[0033] The working principle described above is as follows: the low-speed motor 5 drives the cam 6 in... Figure 4The position rotates slowly counterclockwise. Then, cam 6 presses the first movable rod 8 to move along the slide 7 and compress the second spring 27. The purpose is to pull the steel rope 11 to move by moving the first movable rod 8. Then, by pulling the steel rope 11, the rack 12 moves along the side wall of the support frame 9. Then, the rack 12 moves and compresses the first spring 13. The rack 12 moves and causes the gear 15 and the inclined column 43 to rotate. Since the top of the connecting rod 18 is located inside the inclined groove 14, when rotating, the inclined column 43 changes from the original high position to the low position and contacts the connecting rod 18. During this process, the oil tank 17 lowers the connecting rod 18 under its own weight and compresses the third spring 44. The oil tank 17 lowers so that the oil drain pipe 19 comes into the inside of the cylinder bore 3 and the lowered oil drain pipe 19 contacts the inner wall of the cylinder bore 3. When the oil tank 17 descends, the cover plate 21 will not move because it is connected to the vertical rod 20. However, the descent of the oil tank 17 will cause the sealing plug at the bottom of the cover plate 21 to leave the oil drain pipe 19, so that the lubricating oil in the oil tank 17 can come into the oil drain pipe 19. After the oil tank 17 drops to the lowest position, the button switch 26 will be pressed and the circuit will be connected. Then the drive motor 25 will start and drive the worm gear 24 to rotate. The worm gear 22 will drive the oil drain pipe 19 to rotate, which will help the oil drain pipe 19 to rotate once in the inner wall of the cylinder bore 3 to achieve uniform oil injection. Thus, the above operation can achieve a complete automated oil injection operation. As cam 6 continues to rotate, cam 6 no longer contacts the first movable rod 8. Then, under the reset action of the second spring 27, the steel cable 11 is released. Then, the first spring 13 resets and drives the gear 15 and the inclined column 43 to rotate in the opposite direction. After the inclined column 43 reverses, the high position of the inclined column 43 returns to the bottom of the connecting rod 18, thereby realizing the lifting and reset of the oil tank 17. The third spring 44 set outside the connecting rod 18 helps to reduce the impact force when the oil tank 17 descends, so that it moves downward smoothly and at a uniform speed, avoiding deformation of the oil tank 17 structure or rigid collision between the oil drain pipe 19 and the inner wall of the cylinder bore 3 due to excessive impact. At the same time, it provides auxiliary elastic force for the reset of the oil tank 17, ensuring the overall stable and reliable operation of the oil filling structure.

[0034] It should be explained that the present invention uses a low-speed motor 5 for drive, which aims to extend the operation cycle of the structure and extend the assembly allowance, providing operators with sufficient time for cylinder pressing operations, ensuring smooth and orderly assembly operations, and improving the safety and accuracy of assembly operations.

[0035] Specifically, the positioning structure of the present invention includes a first support rod 28 and a second support rod 29 fixed to the side wall of the assembly table 1. The first support rod 28 is rotatably connected to a second movable rod 30 via a rotating shaft. A coil spring is provided at the bottom end of the rotating shaft to facilitate the second movable rod 30 to return to its original position after rotation.

[0036] Next, the second movable rod 30 is rotatably connected to a pull rod 31, the second support rod 29 is rotatably connected to a limit rod 32, the end of the limit rod 32 is provided with a locking block 33, and one end of the pull rod 31 is rotatably connected to the limit rod 32.

[0037] The next step is that the positioning structure also includes a third support rod 34 fixed to the bottom of the assembly table 1. A tension spring 36 is connected between the third support rod 34 and the limiting rod 32. A round shaft 35 is rotatably connected to the third support rod 34. A round disk 37 is fixed to the outside of the round shaft 35. A round plate 38 is fixed to the bottom of the round shaft 35.

[0038] Next, a stop bar 39 is fixed to the outside of the disc 37, and a slot 40 is formed between every two stop bars 39. The slot 40 is used to position the housing 1 being assembled, so as to achieve the purpose of limiting and fixing. An opening 42 is provided on one side of the assembly table 1 to facilitate the rotation of the stop bar 39. The outer side of the circular plate 38 has slots 41 distributed in a circumferential array, and the locking block 33 cooperates with the slots 41.

[0039] The working principle described above is as follows: Assembly table 1 is tilted towards support rod 28. The angle of tilt is determined according to the usage requirements, which facilitates the movement of housing 2 on top of assembly table 1 after assembly, allowing it to enter the next assembly stage. The assembly table 1 of this invention only shows the assembly of the cylinder barrel; subsequent assembly is also completed on assembly table 1, therefore, it is indicated by dashed lines in the figure. The worker stands at the positioning structure of assembly table 1, holds the cylinder barrel and places it into the cylinder barrel hole 3, thus completing the assembly of the cylinder barrel; like Figure 1 , 5 As shown, when the cam 6 rotates counterclockwise, it first contacts the first movable rod 8 and then contacts the second movable rod 30. Then it will rotate the second movable rod 30. The rotation of the second movable rod 30 pulls the pull rod 31, and then pulls the limit rod 32 through the pull rod 31, so that the locking block 33 at the front end of the limit rod 32 leaves the slot 41 and releases the limit. After the limit is released, the housing will move under the tilting action, and then it will move away from the bayonet 40 formed between the two stop bars 39 through the stop bar 39 that restricts it, thus realizing the operation of fixing before assembly and loosening after assembly. At this time, the next housing 2 waiting to be assembled will also move and press against another stop bar 39. Then, while pressing against the stop bar 39, it will rotate the disc 37, so that the housing 2 will come into the next bayonet 40. When the cam 6 no longer contacts the second movable rod 30, the coil spring at the second movable rod 30 contacts and resets, and the tension spring 36 resets the limit rod 32. Then, the locking block 33 is locked into another locking slot 41, thereby locking and fixing the circular plate 38. Since the circular plate 38 and the circular disk 37 are connected by the circular shaft 35, fixing the circular plate 38 can fix the circular disk 37, which is beneficial for the locking slot 40 to position the housing 2. The positioning structure performs a reciprocating "release-fix" cycle, releasing the assembled housing 2 and fixing the housing 2 waiting to be assembled, and coordinating with oil injection through this operation.

[0040] The above are merely preferred embodiments of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A positioning and assembly device for an automobile engine housing, characterized in that, The assembly includes an assembly platform (1) and an engine housing (2). The housing (2) has a cylinder bore (3) for installing a cylinder. The top of the assembly platform (1) is equipped with a pre-assembly lubrication structure for injecting lubricating oil into the cylinder bore (3). The side of the assembly platform (1) is equipped with a positioning structure for the housing (2) during assembly. The lubrication structure is linked to the positioning structure. The lubrication structure includes a support plate (4) fixed to the bottom of the assembly platform (1). A low-speed motor (5) is mounted on the support plate (4). A cam (6) is fixed to the output end of the low-speed motor (5). The bottom of the assembly platform (1) is equipped with a sliding groove (6). 7) The bottom surface of the assembly table (1) is slidably connected to a first movable rod (8) along the slide groove (7). A second spring (27) is provided inside the slide groove (7) and connected to the first movable rod (8). A support frame (9) is fixed on the side wall of the assembly table (1). Traction blocks (10) are distributed on the surface of the support frame (9) and the side of the assembly table (1). A steel rope (11) is connected to the first movable rod (8). A rack (12) is slidably connected to the support frame (9) along its side wall. A first spring (13) is provided on the side of the support frame (9) and connected to the rack (12). The steel rope (11) passes through the traction block (10) and is connected to one end of the rack (12).

2. The automotive engine housing positioning and assembly device according to claim 1, characterized in that, The oil injection structure also includes an inclined column (43) rotatably connected to the top of the support frame (9). An inclined groove (14) is provided on the top of the inclined column (43). A gear (15) is provided on the outside of the inclined column (43). The gear (15) meshes with the rack (12).

3. The automotive engine housing positioning and assembly device according to claim 2, characterized in that, The oil filling structure also includes a vertical groove (16) provided in the vertical direction of the support frame (9). The top of the support frame (9) is slidably connected to an oil tank (17) along the vertical groove (16). The top of the support frame (9) is slidably connected to a connecting rod (18) in the vertical direction. The end of the connecting rod (18) is fixedly connected to the top of the oil tank (17). The top of the connecting rod (18) is located inside the inclined groove (14). A No. 3 spring (44) is provided on the outside of the connecting rod (18).

4. The automotive engine housing positioning and assembly device according to claim 3, characterized in that, The oil filling structure also includes an oil drain pipe (19) connected to the bottom of the oil tank (17). The top of the support frame (9) is fixed with a vertical rod (20), and the end of the vertical rod (20) is located inside the oil tank (17) and fixed with a cover plate (21).

5. The automotive engine housing positioning and assembly device according to claim 4, characterized in that, The bottom of the cover plate (21) is provided with a sealing plug, which is inserted into the oil drain pipe (19).

6. The automotive engine housing positioning and assembly device according to claim 4, characterized in that, The oil filling structure also includes a worm gear (22) set outside the oil drain pipe (19). The bottom of the oil tank (17) is rotatably connected to a worm (24) through a support block (23). The worm gear (22) meshes with the worm (24). A drive motor (25) is installed at the bottom of the oil tank (17). The output end of the drive motor (25) is fixedly connected to the worm (24). A push button switch (26) is installed inside the support frame (9). The push button switch (26) is connected to the drive motor (25) through a wire.

7. The automotive engine housing positioning and assembly device according to claim 1, characterized in that, The positioning structure includes a first support rod (28) and a second support rod (29) fixed to the side wall of the assembly table (1). The first support rod (28) is rotatably connected to a second movable rod (30) via a rotating shaft. A coil spring is provided at the bottom of the rotating shaft to facilitate the second movable rod (30) to reset after rotation. The second movable rod (30) is rotatably connected to a pull rod (31). The second support rod (29) is rotatably connected to a limit rod (32). A locking block (33) is provided at the end of the limit rod (32). One end of the pull rod (31) is rotatably connected to the limit rod (32).

8. The automotive engine housing positioning and assembly device according to claim 7, characterized in that, The positioning structure also includes a No. 3 support rod (34) fixed at the bottom of the assembly table (1), a tension spring (36) connecting the No. 3 support rod (34) and the limiting rod (32), a round shaft (35) rotatably connected to the No. 3 support rod (34), a round disk (37) fixed to the outside of the round shaft (35), and a round plate (38) fixed to the bottom of the round shaft (35).

9. The automotive engine housing positioning and assembly device according to claim 8, characterized in that, The positioning structure also includes a stop bar (39) fixed to the outside of the disc (37), and a bayonet (40) is formed between every two stops (39). An opening (42) is provided on one side of the assembly table (1) to facilitate the rotation of the stop bar (39).

10. The automotive engine housing positioning and assembly device according to claim 8, characterized in that, The positioning structure also includes slots (41) distributed on the outside of the circular plate (38), and the card block (33) cooperates with the slots (41).

Images