Engine housing connection hole plugging apparatus

Abstract

This invention discloses an engine housing connection hole sealing device, comprising: a workbench, a clamping unit, at least one set of steel ball pressing units, at least one set of cap pressing units, and a water passage pressing unit. The steel ball pressing unit includes a mounting block movable toward the housing, a first connecting block connected to the mounting block via an elastic reset mechanism, a drive mechanism for pushing the first connecting block to move horizontally toward or away from the housing, and at least one push rod whose length direction is the same as the moving direction of the first connecting block and whose end is slidably inserted into the mounting block. A first through groove is provided through the mounting block, and a vertical second through groove communicating with the first through groove is provided through the top of the mounting block. This device is small in size, low in cost, and highly practical. Before the housing is clamped by the clamping unit, the steel balls, cup-shaped caps, and water passages are manually fed separately. After the housing is clamped, the steel balls, cup-shaped caps, and water passages are simultaneously pressed onto the housing, improving work efficiency.

Description

Technical Field

[0001] This invention relates to the technical field of engine housing press-fitting, and specifically to an engine housing connection hole sealing device. Background Technology

[0002] Bowl-shaped caps and steel balls are commonly used to seal process holes in engine housings. During engine manufacturing, holes are pre-drilled in the cylinder block to facilitate machining and assembly. These holes need to be sealed after machining to ensure engine sealing and proper operation. The water passage inlet is designed to ensure efficient and reliable operation of the cooling system, while also improving the overall performance and durability of the engine.

[0003] In the existing technology, when pressing the engine housing, a production line pressing device is used to drive the housing through the steel ball pressing station, the cup-shaped cover pressing station and the water channel pressing station in sequence. It is even necessary to use a robot to match it. As a result, the overall equipment is not only large and costly, but the step-by-step pressing also leads to increased time and low pressing efficiency. Therefore, it is necessary to design an engine housing connection hole sealing device. Summary of the Invention

[0004] To address the aforementioned technical problems, the purpose of this invention is to overcome the issues of large size, high cost, and low pressing efficiency in existing pressing equipment.

[0005] To achieve the above objectives, the present invention provides an engine housing connection hole sealing device, comprising: a worktable, a clamping unit mounted on the worktable for holding the housing, at least one set of steel ball pressing units mounted on the worktable for pressing steel balls into corresponding holes on the housing, at least one set of cap pressing units mounted on the worktable for pressing cup-shaped caps into corresponding holes on the housing, and a water passage pressing unit mounted on the worktable for pressing water passage openings into corresponding positions on the housing.

[0006] The steel ball pressing unit includes a mounting block that can move toward the housing to contact the housing, a first connecting block connected to the mounting block via an elastic reset mechanism, a drive mechanism mounted on a worktable for pushing the first connecting block to move horizontally toward or away from the housing, and at least one push rod whose length direction is the same as the moving direction of the first connecting block and whose end is slidably inserted into the mounting block. The mounting block has a horizontal first through slot through which the push rod is inserted, and the top of the mounting block has a vertical second through slot communicating with the first through slot.

[0007] Preferably, the elastic reset mechanism includes several horizontal guide rods that are fixedly connected to the mounting block and slidably connected to the first connecting block. At least one guide rod is equipped with a reset spring at both ends that abut against the mounting block and the first connecting block, respectively. The first connecting block is provided with a guide groove through which the corresponding guide rod is slidably inserted. The end of the guide rod away from the mounting block is connected to a sliding member that is slidably connected to the guide groove. The inner wall of the end of the guide groove near the mounting block is provided with a limiting flange.

[0008] Preferably, the driving mechanism includes a first mounting bracket mounted on the workbench and a horizontal first driving push rod mounted on the first mounting bracket and whose moving end is fixedly connected to a first connecting block, wherein the first connecting block is horizontally slidably connected to the first mounting bracket.

[0009] Preferably, the capping pressing unit includes a horizontal second drive push rod mounted on the workbench via a second mounting bracket, a second connecting block mounted on the moving end of the second drive push rod and slidably connected to the second mounting bracket, and at least one first mounting rod mounted on the second connecting block with the same length direction as the moving direction of the second connecting block.

[0010] The first mounting rod is fitted onto the side wall of the second connecting block away from the second drive push rod, and the end of the first mounting rod away from the second connecting block has a protrusion that matches the bowl-shaped cap.

[0011] Preferably, the waterway inlet pressing unit includes a horizontal third drive push rod mounted on the workbench via a third mounting bracket and a horizontal second mounting rod connected to the moving end of the third drive push rod via a third connecting block.

[0012] Preferably, the clamping unit includes a pressing mechanism mounted on the worktable via a fourth mounting bracket for pressing against the top of the housing, a horizontal support plate slidably connected to the worktable, and a horizontal moving mechanism mounted on the worktable for moving the support plate directly below the pressing mechanism.

[0013] The support plate is equipped with a plurality of positioning blocks spaced along the edge of the support plate, and the support plate is recessed with a plurality of mounting holes, at least one of which is fitted with a vertical positioning post that matches the housing.

[0014] Preferably, the top of the positioning block is provided with a number of parallel waist-shaped through slots, and the upper end of the waist-shaped through slots is provided with a waist-shaped stepped slot. Each waist-shaped through slot is provided with a mounting bolt that is threadedly connected to the support plate and whose head can abut against the bottom wall of the waist-shaped stepped slot.

[0015] Preferably, the workbench is equipped with a positioning element located in the forward direction of the horizontal moving mechanism and capable of contacting the outer wall of the housing via a fifth mounting bracket.

[0016] Preferably, the workbench is also equipped with a pair of auxiliary positioning mechanisms that are symmetrically arranged about the support plate and are both located on the side of the fourth mounting bracket away from the positioning component;

[0017] The auxiliary positioning mechanism includes a sixth mounting bracket mounted on the workbench, a fourth drive push rod mounted horizontally on the sixth mounting bracket, and a pressure arm mounted on the moving end of the fourth drive push rod by several bolts and capable of abutting against the corner of the housing. The pressure arm is provided with a notch that matches the corner of the housing.

[0018] Preferably, the pressing mechanism includes a vertical fifth drive push rod mounted on a fourth mounting bracket and a pressing component mounted on the moving end of the fifth drive push rod.

[0019] According to the above technical solution, the engine housing connection hole sealing device provided by the present invention has the following advantages compared with the prior art:

[0020] Firstly, this device is small in size, low in cost, and highly practical. Before the housing is clamped by the clamping unit, the steel balls, cup-shaped caps and water inlets are manually fed separately. After the housing is clamped, the steel balls, cup-shaped caps and water inlets are pressed onto the housing at the same time, which improves work efficiency.

[0021] Secondly, the second channel allows personnel to easily place steel balls into the first channel. If the steel ball is directly inserted into the end of the first channel, it is easy for it to fall out. The second channel prevents the steel ball from falling out.

[0022] Other features and advantages of the present invention will be described in detail in the following detailed description section; and all parts not covered in the present invention are the same as or can be implemented using the prior art. Attached Figure Description

[0023] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used together with the following detailed description to explain the invention, but do not constitute a limitation thereof. In the drawings:

[0024] Figure 1 This is a three-dimensional structural diagram of an engine housing connection hole sealing device provided by the present invention;

[0025] Figure 2 This is a partial three-dimensional structural diagram of an engine housing connection hole sealing device provided by the present invention. Figure 1 ;

[0026] Figure 3 This is a partial three-dimensional structural diagram of an engine housing connection hole sealing device provided by the present invention. Figure 2 ;

[0027] Figure 4 This is a three-dimensional structural diagram of the steel ball pressing unit of an engine housing connection hole sealing device provided by the present invention;

[0028] Figure 5 This is a partial three-dimensional structural diagram of an engine housing connection hole sealing device provided by the present invention. Figure 3 ;

[0029] Figure 6 This is a partial three-dimensional structural diagram of an engine housing connection hole sealing device provided by the present invention. Figure 4 ;

[0030] Figure 7 This is a three-dimensional structural diagram of the pressing mechanism of an engine housing connection hole sealing device provided by the present invention;

[0031] Figure 8 This invention provides a device for sealing engine housing connection holes. Figure 6 Enlarged view of point A in the middle;

[0032] Figure 9 This is a three-dimensional structural diagram of the housing of an engine housing connection hole sealing device provided by the present invention after press-fitting.

[0033] Explanation of reference numerals in the attached figures

[0034] 1. Workbench; 2. Steel ball; 3. Bowl-shaped cover; 4. Water inlet; 5. Mounting block; 6. First connecting block; 7. Push rod; 8. First through slot; 9. Second through slot; 10. Guide rod; 11. Return spring; 12. First mounting bracket; 13. First drive push rod; 14. Second mounting bracket; 15. Second drive push rod; 16. Second connecting block; 17. First mounting rod; 18. Protrusion; 19. Third mounting bracket; 20. Third drive push rod; 21. Third connecting block; 22. Second mounting rod; 23. Fourth mounting bracket; 24. Positioning block; 25. Mounting hole; 26. Positioning post; 27. Fifth mounting bracket; 28. Positioning component; 29. ​​Sixth mounting bracket; 30. Fourth drive push rod; 31. Pressure arm; 32. Fifth drive push rod; 33. Lower pressure component; 34. Support plate; 35. Horizontal moving mechanism. Detailed Implementation

[0035] The specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit the present invention.

[0036] In this invention, unless otherwise stated, directional terms such as "upper," "lower," "inner," and "outer" in the terminology represent the orientation of the term in its normal use or are common terms understood by those skilled in the art, and should not be regarded as limitations on the term.

[0037] like Figure 1-9 As shown, an engine housing connection hole sealing device includes: a workbench 1, a clamping unit mounted on the workbench 1 for holding the housing, at least one set of steel ball pressing units mounted on the workbench 1 for pressing steel balls 2 into corresponding holes on the housing, at least one set of sealing cap pressing units mounted on the workbench 1 for pressing cup-shaped caps 3 into corresponding holes on the housing, and a water passage pressing unit mounted on the workbench 1 for pressing water passage openings 4 into corresponding positions on the housing.

[0038] The steel ball pressing unit includes a mounting block 5 that can move toward the housing to contact the housing, a first connecting block 6 connected to the mounting block 5 via an elastic reset mechanism, a drive mechanism mounted on the worktable 1 for pushing the first connecting block 6 to move horizontally toward or away from the housing, and at least one push rod 7 whose length direction is the same as the moving direction of the first connecting block 6 and whose end is slidably inserted into the mounting block 5. The mounting block 5 is provided with a horizontal first through groove 8 for the push rod 7 to be inserted, and the top of the mounting block 5 is provided with a vertical second through groove 9 communicating with the first through groove 8.

[0039] In the above technical solution, before the housing is clamped by the clamping unit, the steel ball 2, the bowl-shaped cap 3 and the water channel 4 are manually fed. After the housing is clamped, the steel ball 2, the bowl-shaped cap 3 and the water channel 4 are pressed onto the housing at the same time, thereby improving work efficiency.

[0040] When steel ball 2 is placed into the second through slot 9, steel ball 2 will move downwards due to its own gravity to the connection between the first through slot 8 and the second through slot 9. After the housing is fixed and clamped by the clamping unit, the drive mechanism pushes the first connecting block 6 closer to the housing. After the mounting block 5 contacts the housing, the drive mechanism continues to push the first connecting block 6 closer to the housing. At this time, the elastic reset mechanism is compressed, the distance between the mounting block 5 and the first connecting block 6 decreases, and the push rod 7 slides close to the housing in the first through slot 8, pushing steel ball 2 into the corresponding hole on the housing. Then the drive mechanism drives the first connecting block 6 to return to its original position, the mounting block 5 separates from the housing, and the elastic reset mechanism increases the distance between the mounting block 5 and the first connecting block 6 to return to its original position, thereby driving the push rod 7 to automatically return to its original position.

[0041] The second through slot 9 allows personnel to easily place the steel ball 2 into the first through slot 8. If the steel ball 2 is directly inserted into the end of the first through slot 8, it is easy for the steel ball 2 to fall off. The second through slot 9 can prevent the steel ball 2 from falling off. Alternatively, an automatic feeding mechanism for the steel ball 2 can be configured, with the discharge end of the automatic feeding mechanism connected to the upper end of the second through slot 9.

[0042] The workbench 1 is also equipped with a housing, which is equipped with a display screen, indicator lights and safety light curtains. The installation of the light curtains can improve operational safety. The display screen can show the number of housings that have been pressed and the working status of the equipment and other relevant information. The workbench 1 is also equipped with a start button and an emergency stop button.

[0043] In a preferred embodiment of the invention, the elastic reset mechanism includes a plurality of horizontal guide rods 10 fixedly connected to the mounting block 5 and slidably connected to the first connecting block 6. At least one guide rod 10 is equipped with a reset spring 11 whose two ends respectively abut against the mounting block 5 and the first connecting block 6. The first connecting block 6 is provided with a guide groove through which the corresponding guide rod 10 is slidably inserted. The end of the guide rod 10 away from the mounting block 5 is connected to a sliding member that is slidably connected to the guide groove. The inner wall of the end of the guide groove near the mounting block 5 is provided with a limiting flange.

[0044] In the above technical solution, after the mounting block 5 contacts the housing, the first connecting block 6 continues to move toward the mounting block 5, the reset spring 11 is further compressed, and the sliding member slides in the guide groove; when the steel ball 2 is pressed into the housing, the first drive push rod 13 drives the first connecting block 6 to return to its original position, and the reset spring 11 also pushes the mounting block 5 away from the first connecting block 6, and the sliding member slides away from the drive mechanism in the guide groove, so that the mounting block 5 returns to its original position.

[0045] In a preferred embodiment of the invention, the driving mechanism includes a first mounting bracket 12 mounted on the workbench 1 and a horizontal first driving push rod 13 mounted on the first mounting bracket 12 and whose movable end is fixedly connected to the first connecting block 6, wherein the first connecting block 6 is horizontally slidably connected to the first mounting bracket 12.

[0046] In a preferred embodiment of the invention, the capping pressing unit includes a horizontal second drive push rod 15 mounted on the workbench 1 via a second mounting bracket 14, a second connecting block 16 mounted on the moving end of the second drive push rod 15 and horizontally slidably connected to the second mounting bracket 14, and at least one first mounting rod 17 mounted on the second connecting block 16 and whose length direction is the same as the moving direction of the second connecting block 16.

[0047] The first mounting rod 17 is mounted on the side wall of the second connecting block 16 away from the second drive push rod 15, and the end of the first mounting rod 17 away from the second connecting block 16 has a protrusion 18 that matches the bowl-shaped cover 3.

[0048] In the above technical solution, the bowl-shaped cover 3 is manually fastened onto the protrusion 18 by a person. The second drive push rod 15 drives the second connecting block 16 to move toward the housing. The first mounting rod 17 presses the bowl-shaped cover 3 into the corresponding hole in the housing. Then the second drive push rod 15 drives the second connecting block 16 away from the housing to return to its original position.

[0049] In a preferred embodiment of the invention, the waterway press-fitting unit includes a horizontal third drive push rod 20 mounted on the workbench 1 via a third mounting bracket 19 and a horizontal second mounting rod 22 connected to the moving end of the third drive push rod 20 via a third connecting block 21.

[0050] In the above technical solution, the water outlet 4 is manually fitted onto the second mounting rod 22. After the housing is fixed and clamped, the third drive push rod 20 drives the second mounting block 5 to move closer to the housing through the third connecting block 21, pressing the water outlet 4 onto the housing.

[0051] In a preferred embodiment of the invention, the clamping unit includes a pressing mechanism mounted on the worktable 1 via a fourth mounting bracket 23 for pressing against the top of the housing, a horizontal support plate 34 slidably connected to the worktable 1, and a horizontal moving mechanism 35 mounted on the worktable 1 for moving the support plate 34 directly below the pressing mechanism.

[0052] The support plate 34 is equipped with a plurality of positioning blocks 24 spaced along the edge of the support plate 34. The support plate 34 is recessed with a plurality of mounting holes 25, and at least one mounting hole 25 is equipped with a vertical positioning post 26 that matches the housing.

[0053] In the above technical solution, the housing of the engine to be press-fitted is placed on the support plate 34, and the housing is placed between several positioning blocks 24. The positioning pin 26 is also inserted into the hole or groove on the housing. The several positioning blocks 24 can facilitate the initial positioning of the housing, so that the operator can place the housing between the several positioning blocks 24. The positioning pin 26 inserted into the housing can further improve the positioning accuracy of the housing.

[0054] After the housing is positioned on the support plate 34, the horizontal moving mechanism 35 pushes the support plate 34 toward the pressing mechanism, pushing the housing directly below the pressing mechanism. The pressing mechanism then presses the housing in place, and the housing is now fixed and clamped, allowing the next step to be performed, such as plugging the steel ball 2 into the corresponding hole in the housing.

[0055] Depending on the type of engine housing, positioning pins 26 can be fitted onto mounting holes 25 at different locations, making this tooling suitable for different types of engine housings.

[0056] The horizontal moving mechanism 35 is a mature existing technology, so its specific structure will not be described or introduced in this article. It can be driven by a lead screw slide or a drive push rod 7.

[0057] In a preferred embodiment of the invention, the top of the positioning block 24 is provided with a plurality of parallel waist-shaped through slots, the upper end of the waist-shaped through slots is provided with a waist-shaped stepped slot, and each waist-shaped through slot is provided with an installation bolt that is threadedly connected to the support plate 34 and whose head can abut against the bottom wall of the waist-shaped stepped slot.

[0058] In the above technical solution, by loosening the mounting bolts, the positioning block 24 can slide, thereby adjusting the position of the positioning block 24, and then tightening the mounting bolts to fix the positioning block 24.

[0059] In a preferred embodiment of the invention, a positioning element 28 located in the forward direction of the horizontal moving mechanism 35 and capable of contacting the outer wall of the housing is mounted on the worktable 1 via a fifth mounting bracket 27.

[0060] In the above technical solution, when the horizontal moving mechanism 35 pushes the support plate 34 to move directly below the pressing mechanism, the outer wall of the housing will come into contact with the positioning member 28, and the moving end of the horizontal moving mechanism 35 will stop moving. At this time, the housing is just directly below the pressing mechanism, and the positioning member 28 is conducive to the positioning of the housing.

[0061] In a preferred embodiment of the invention, the workbench 1 is further equipped with a pair of auxiliary positioning mechanisms that are symmetrically arranged about the support plate 34 and are both located on the side of the fourth mounting bracket 23 away from the positioning member 28.

[0062] The auxiliary positioning mechanism includes a sixth mounting bracket 29 mounted on the workbench 1, a fourth drive push rod 30 mounted horizontally on the sixth mounting bracket 29, and a pressure arm 31 mounted on the moving end of the fourth drive push rod 30 by several bolts and capable of abutting against the corner of the housing. The pressure arm 31 is provided with a notch that matches the corner of the housing.

[0063] In the above technical solution, the positioning element 28 is matched with a pair of auxiliary positioning mechanisms to clamp the housing from the horizontal direction, while the support plate 34 and the pressing mechanism clamp the housing from the vertical direction. When the steel ball 2, the bowl-shaped cap 3 or the water channel 4 are inserted into the hole on the housing, the side wall of the housing will be subjected to lateral thrust. Therefore, by clamping the housing with the positioning element 28 and the pressing arm 31, the lateral thrust on the housing can be shared, thereby improving the clamping stability of the housing.

[0064] In a preferred embodiment of the invention, the pressing mechanism includes a vertical fifth drive push rod 32 mounted on a fourth mounting bracket 23 and a pressing member 33 mounted on the moving end of the fifth drive push rod 32.

[0065] In the above technical solution, the fifth drive push rod 32 drives the lower pressure member 33 to move vertically downward, which can press and hold the top of the housing, so as to cooperate with the support plate 34 to clamp the housing from the vertical direction.

[0066] The preferred embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the specific details of the above embodiments. Within the scope of the technical concept of the present invention, various simple modifications can be made to the technical solution of the present invention, and these simple modifications all fall within the protection scope of the present invention.

[0067] It should also be noted that the various specific technical features described in the above specific embodiments can be combined in any suitable manner without contradiction. In order to avoid unnecessary repetition, the present invention will not describe the various possible combinations separately.

[0068] Furthermore, various different embodiments of the present invention can be combined in any way, as long as they do not violate the spirit of the present invention, they should also be regarded as the content disclosed by the present invention.

Claims

1. A device for sealing engine housing connection holes, characterized in that, include: Workbench (1), clamping unit mounted on workbench (1) for holding the housing, at least one set of steel ball pressing unit mounted on workbench (1) for pressing steel ball (2) into corresponding hole on housing, at least one set of cap pressing unit mounted on workbench (1) for pressing cup-shaped cap (3) into corresponding hole on housing, and cap pressing unit mounted on workbench (1) for pressing waterway (4) into corresponding position on housing; The steel ball pressing unit includes a mounting block (5) that can move toward the housing to contact the housing, a first connecting block (6) connected to the mounting block (5) via an elastic reset mechanism, a drive mechanism mounted on the worktable (1) for pushing the first connecting block (6) to move horizontally toward or away from the housing, and at least one push rod (7) whose length direction is the same as the moving direction of the first connecting block (6) and whose end is slidably inserted into the mounting block (5). The mounting block (5) is provided with a horizontal first through groove (8) for the push rod (7) to be inserted, and the top of the mounting block (5) is provided with a vertical second through groove (9) communicating with the first through groove (8).

2. The engine housing connection hole sealing device according to claim 1, characterized in that, The elastic reset mechanism includes several horizontal guide rods (10) that are fixedly connected to the mounting block (5) and slidably connected to the first connecting block (6). At least one guide rod (10) is equipped with a reset spring (11) whose two ends respectively abut against the mounting block (5) and the first connecting block (6). The first connecting block (6) is provided with a guide groove through which the corresponding guide rod (10) is slidably inserted. The end of the guide rod (10) away from the mounting block (5) is connected with a sliding member that is slidably connected to the guide groove. The inner wall of the guide groove near the mounting block (5) is provided with a limiting flange.

3. The engine housing connection hole sealing device according to claim 1, characterized in that, The drive mechanism includes a first mounting bracket (12) mounted on the workbench (1) and a horizontal first drive push rod (13) mounted on the first mounting bracket (12) and whose moving end is fixedly connected to the first connecting block (6). The first connecting block (6) is horizontally slidably connected to the first mounting bracket (12).

4. The engine housing connection hole sealing device according to claim 1, characterized in that, The capping pressing unit includes a horizontal second drive push rod (15) mounted on the workbench (1) via a second mounting bracket (14), a second connecting block (16) mounted on the moving end of the second drive push rod (15) and horizontally slidably connected to the second mounting bracket (14), and at least one first mounting rod (17) mounted on the second connecting block (16) and whose length direction is the same as the moving direction of the second connecting block (16); The first mounting rod (17) is mounted on the side wall of the second connecting block (16) away from the second drive push rod (15), and the end of the first mounting rod (17) away from the second connecting block (16) has a protrusion (18) that matches the bowl-shaped cover (3).

5. The engine housing connection hole sealing device according to claim 1, characterized in that, The waterway inlet pressing unit includes a horizontal third drive push rod (20) mounted on the workbench (1) via a third mounting bracket (19) and a horizontal second mounting rod (22) connected to the moving end of the third drive push rod (20) via a third connecting block (21).

6. The engine housing connection hole sealing device according to claim 1, characterized in that, The clamping unit includes a pressing mechanism mounted on the worktable (1) via a fourth mounting bracket (23) for pressing against the top of the housing, a horizontal support plate (34) slidably connected to the worktable (1), and a horizontal moving mechanism (35) mounted on the worktable (1) for moving the support plate (34) directly below the pressing mechanism. The support plate (34) is equipped with a plurality of positioning blocks (24) spaced along the edge of the support plate (34). The support plate (34) is recessed with a plurality of mounting holes (25). At least one mounting hole (25) is equipped with a vertical positioning post (26) that matches the housing.

7. The engine housing connection hole sealing device according to claim 6, characterized in that, The top of the positioning block (24) is provided with several parallel waist-shaped through slots. The upper end of the waist-shaped through slot is provided with a waist-shaped stepped slot. Each waist-shaped through slot is provided with a mounting bolt that is threadedly connected to the support plate (34) and whose head can abut against the bottom wall of the waist-shaped stepped slot.

8. The engine housing connection hole sealing device according to claim 6, characterized in that, The workbench (1) is equipped with a positioning element (28) located in the forward direction of the horizontal moving mechanism (35) and capable of contacting the outer wall of the housing via a fifth mounting bracket (27).

9. The engine housing connection hole sealing device according to claim 8, characterized in that, The workbench (1) is also equipped with a pair of auxiliary positioning mechanisms that are symmetrically arranged about the support plate (34) and are both located on the side of the fourth mounting bracket (23) away from the positioning member (28); The auxiliary positioning mechanism includes a sixth mounting bracket (29) mounted on the worktable (1), a fourth drive push rod (30) mounted horizontally on the sixth mounting bracket (29), and a pressure arm (31) mounted on the moving end of the fourth drive push rod (30) by several bolts and capable of abutting against the corner of the housing. The pressure arm (31) is provided with a notch that matches the corner of the housing.

10. The engine housing connection hole sealing device according to claim 6, characterized in that, The pressing mechanism includes a vertical fifth drive push rod (32) mounted on the fourth mounting bracket (23) and a pressing component (33) mounted on the moving end of the fifth drive push rod (32).

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