Crankshaft tightening and pressing device

Abstract

The utility model relates to a crankshaft tightening and press-fitting device which is used for an engine assembly, the engine assembly comprises a crankshaft, an oil seal and an engine shell, the crankshaft tightening and press-fitting device comprises a machine table and a press-fitting mechanism, the oil seal is placed in an oil seal groove, a shaft head of the crankshaft is in threaded connection with a first roller body, and a first air cylinder is started; a piston rod of the first air cylinder extends to enable the first jacking part to ascend to jack the oil seal to be installed at the oil seal installation position of the crankshaft to complete installation, a shaft head of the crankshaft is in threaded connection with the first roller body, the position of the crankshaft is fixed, a first hole and an oil seal groove are formed, and the first jacking part is arranged on the outer side of the first roller body in a sleeving mode and moves up and down in the first hole. The first air cylinder drives the first jacking and pressing piece to jack and press the oil seal in the oil seal groove to the crankshaft, the coaxiality during installation is guaranteed, the precision during installation of the oil seal and the crankshaft is improved, and the working efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of engine assembly technology, and in particular to a crankshaft clamping device. Background Technology

[0002] Existing crankshaft oil seal press-fitting devices include a fixed base, a cylinder, and a pressure plate. When pressing the oil seal, the crankshaft is first fixed in position by a limiting mechanism on the fixed base, and the oil seal is placed there. The cylinder drives the pressure plate to press down the oil seal to perform the press-fitting operation. Since the crankshaft is not rigidly connected, the crankshaft will be squeezed and shaken by the oil seal during this process. There is an offset between the oil seal and the crankshaft, which cannot guarantee the accuracy of the oil seal and crankshaft installation and results in low work efficiency.

[0003] It should be noted that the information disclosed in the background section above is only used to enhance the understanding of the background of this disclosure, and therefore may include information that does not constitute prior art known to those skilled in the art. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model discloses a crankshaft pressing device to solve the problems of insufficient accuracy in the installation of oil seals and crankshafts and low work efficiency.

[0005] The technical solution adopted in this utility model is as follows:

[0006] The crankshaft clamping device includes:

[0007] The machine tool has an inner cavity at its bottom. The machine tool is equipped with a mounting platform and a base. The mounting platform is located at the top of the machine tool, and the base is located at the bottom of the inner cavity. The surface of the mounting platform has a through first hole, and an oil seal groove is opened on the mounting platform. The oil seal groove is located outside the first hole, and the oil seal is inserted into the oil seal groove.

[0008] The first rod body has its bottom end set on the base, and its top end extends out of the first hole and is screwed to the crankshaft shaft end;

[0009] A pressing mechanism is disposed on the base, and the pressing mechanism includes:

[0010] The first pressing member has a through second hole. The first pressing member is sleeved on the outside of the first rod body. The first pressing member moves up and down in the first hole. The top end of the first rod body passes through the second hole and moves up and down in the second hole.

[0011] The first cylinder has its piston rod located at the bottom of the first pressing member, which lifts or lowers the first pressing member.

[0012] A further technical solution is that a screw hole is provided at the top end of the first roller body, and the crankshaft tightening and pressing device includes a tightening mechanism, which includes:

[0013] The second cylinder has its bottom end fixed to the top end of the base. The upper end of the second cylinder is provided with a first fixing plate. The top end of the second cylinder has a guide sleeve. The guide sleeve is sleeved on the outside of the piston rod of the second cylinder. The guide sleeve and the piston rod of the second cylinder pass through the first fixing plate. The bottom end of the guide sleeve of the second cylinder is fixedly sleeved with a first bearing.

[0014] An electric motor is mounted on the side of the first fixed plate;

[0015] A hollow cylinder has its inner bottom end engaged with the outer side of the first bearing. A transmission belt is fitted onto the outer side of the hollow cylinder at the output end of the motor. A sliding groove is provided on the outer side of the hollow cylinder. The bottom end of the first rod extends into the hollow cylinder. The piston rod of the second cylinder is located at the bottom end of the first rod. A second rod is provided on the outer side of the bottom of the first rod. The second rod is engaged with the sliding groove and moves up and down in the sliding groove.

[0016] A further technical solution is that a second bearing is fixedly provided on the outer side of the top of the hollow cylinder, a second fixing plate is fixedly provided on the outer side of the second bearing, and a fixing column is also provided on the top of the first fixing plate, the fixing column being fixedly connected to the first fixing plate and the second fixing plate.

[0017] A further technical solution is that the first cylinder is fixed to the lower end of the second fixed plate, the piston rod of the first cylinder passes through the second fixed plate, the bottom of the first pressing member is fixedly connected to a base plate, the piston rod of the first cylinder lifts or lowers the base plate, the bottom end of the base plate is also provided with a first guide tube, and the fixing column passes through the second fixed plate, the first guide tube and the base plate in sequence and is fixedly connected to the mounting platform.

[0018] A further technical solution is that the crankshaft pressing device further includes a second pressing component, the second pressing component includes a top plate and a third cylinder, the top plate is located at the top of the machine tool, the top plate has a through third hole, the mounting platform is located in the third hole, the third cylinder is located at the top of the inner cavity, the piston rod of the third cylinder passes through the top surface of the machine tool and is connected to the top plate, lifting or lowering the top plate.

[0019] A further technical solution is that the second pressing component also includes a guide post, which is located at the bottom end of the top plate, and a second guide tube is also provided at the lower end of the top surface of the machine platform. The guide post passes through the top surface of the machine platform and the second guide tube in sequence.

[0020] A further technical solution is that the crankshaft pressing device further includes a positioning mechanism, which is located at the top of the machine tool. The positioning mechanism includes a slide rail, a slider, a lead screw, and a positioning plate. The two ends of the lead screw are fixed to the top of the machine tool. The two slide rails are located at the top of the machine tool and on both sides of the lead screw. A fixing block is provided at the bottom of the positioning plate and is threadedly connected to the lead screw. The slider is located at the top of the positioning plate and on both sides of the fixing block. The bottom of the slider is slidably connected to the top of the slide rail. When the lead screw is rotated, the lead screw and the fixing block of the positioning plate generate threaded displacement, driving the positioning plate to move closer to or away from the crankshaft.

[0021] A further technical solution is that the crankshaft pressing device further includes a laser marking device, which includes a control console and a laser marking machine. The laser marking machine is slidably disposed behind the machine base, with its output end facing the crankshaft. The control console is disposed at the top of the laser marking machine, and the control console is electrically connected to the laser marking machine.

[0022] The beneficial effects of this utility model embodiment are as follows:

[0023] (I) The crankshaft pressing device includes a machine base and a pressing mechanism. The oil seal is inserted into the oil seal groove. The crankshaft shaft head is threadedly connected to the upper end of the first roller body. The first cylinder is started, and the piston rod of the first cylinder extends, causing the first pressing component to rise and press the oil seal to the oil seal installation position on the crankshaft to complete the installation. The crankshaft shaft head is threadedly connected to the first roller body, fixing the position of the crankshaft. The first hole and the oil seal groove are set. The first pressing component is sleeved on the outside of the first roller body and moves up and down in the first hole. The first cylinder drives the first pressing component to press the oil seal in the oil seal groove onto the crankshaft rigidly connected to the first roller body, so that the oil seal and the crankshaft are coaxially installed, ensuring the coaxiality and accuracy of the oil seal and the crankshaft during installation, and improving work efficiency.

[0024] (ii) Furthermore, the base is equipped with a tightening mechanism, which includes a second cylinder, a motor, and a hollow cylinder. The output end of the motor drives the hollow cylinder to rotate rapidly via a transmission belt. As the second roller extends into the slide groove, the hollow cylinder drives the first roller to rotate synchronously, so that the crankshaft end is screwed into the screw hole. When the second cylinder is activated, the piston rod of the second cylinder retracts downward, and the first roller moves downward along the second hole, so that the oil seal installation point of the crankshaft fits the oil seal. The tightening mechanism is set up so that the top of the first roller is automatically screwed into the crankshaft end through the coordinated rotation of the motor, the hollow cylinder, and the first roller. This improves the efficiency of production assembly, reduces manual operation time, and completes the fastening process quickly and efficiently, making the assembly line more efficient.

[0025] (iii) Furthermore, a laser marking device is also provided at the top of the machine. The laser marking device includes a control console and a laser marking machine. The control console and the laser marking machine are electrically connected. Through the integration of the laser marking device, the marking process can be automated, reducing manual intervention, improving the working efficiency of the production line, and reducing errors or inconsistencies that may be caused by manual marking.

[0026] (iv) Furthermore, the crankshaft pressing device also includes a second pressing component, which includes a top plate and a third cylinder. Lubricating oil is applied to the crankshaft port of the engine housing, and the engine housing is placed on the top plate. The crankshaft port of the engine housing corresponds to the mounting platform and is engaged in the groove formed by the third hole and the mounting platform. The third cylinder is started, and the piston rod of the third cylinder extends upward, lifting the top plate. The engine housing moves upward relative to the crankshaft, so that the crankshaft is engaged in the crankshaft port of the engine housing. By lifting the engine housing through the second pressing component, the crankshaft can be installed on the engine housing at the same time as the oil seal is installed, reducing the operation steps, improving the efficiency of the assembly line, and shortening the production cycle.

[0027] (V) Furthermore, the crankshaft pressing device also includes a positioning mechanism. The positioning mechanism is located at the top of the machine tool and at the first end of the top plate. The positioning mechanism includes slide rails, a slider, a lead screw, and a positioning plate. Both ends of the lead screw are fixed to the top of the machine tool. Two slide rails are located at the top of the machine tool and on both sides of the lead screw. The bottom end of the positioning plate is connected to the nut of the lead screw. The slider is located at the top of the positioning plate and on both sides of the nut of the lead screw. Rotating the lead screw drives the positioning plate to move closer to or further away from the top plate. By positioning the engine housing at its installation position using the positioning mechanism, the installation position of the engine housing can be accurately determined, ensuring that all components can be accurately aligned and positioned during installation. This reduces errors during installation, thereby ensuring the precision assembly of the crankshaft and the engine housing, and improving the overall performance and reliability of the engine. Attached Figure Description

[0028] Figure 1 This is an isometric view of the crankshaft clamping device of this utility model.

[0029] Figure 2 for Figure 1 Enlarged view at point A.

[0030] Figure 3 This is a top view of the crankshaft pressing device of this utility model.

[0031] Figure 4 This is a front view schematic diagram of the pressing mechanism and the tightening mechanism in the crankshaft tightening device of this utility model.

[0032] Figure 5 This is a vertical cross-sectional schematic diagram of the pressing mechanism and the tightening mechanism in the crankshaft tightening device of this utility model.

[0033] In the picture:

[0034] 1. Machine base; 11. Mounting platform; 12. Base; 13. First hole; 14. Oil seal groove; 2. First roller body; 21. Screw hole; 22. Second roller body; 3. Pressing mechanism; 31. First pressing component; 32. First cylinder; 33. Second hole; 34. Base plate; 35. First guide tube; 4. Tightening mechanism; 41. Second cylinder; 411. Guide sleeve; 42. Motor; 43. Hollow cylinder body; 431. Slide groove; 44. 45. First fixed plate; 46. Fixed column; 47. First bearing; 48. Transmission belt; 49. Second bearing; 50. Second fixed plate; 61. Laser marking device; 62. Control console; 63. Laser marking machine; 74. Second top pressing component; 65. Top plate; 66. Third cylinder; 67. Third hole; 78. Guide column; 79. Second guide tube; 70. Positioning mechanism; 71. Slide rail; 72. Slider; 73. Lead screw; 74. Positioning plate. Detailed Implementation

[0035] The specific embodiments of this utility model are described below with reference to the accompanying drawings.

[0036] To make the objectives, technical solutions, and advantages of this utility model clearer, the device proposed by this utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments. The advantages and features of this utility model will become clearer according to the following description. It should be noted that the accompanying drawings are in a very simplified form and use non-precise proportions, only used to conveniently and clearly assist in illustrating the purpose of the embodiments of this utility model. Please refer to the accompanying drawings to make the objectives, features, and advantages of this utility model more apparent and understandable. It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are only used to complement the content disclosed in the specification, for those skilled in the art to understand and read, and are not intended to limit the implementation conditions of this utility model. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in the proportional relationships, or adjustments to the size, without affecting the effects and objectives that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0037] First embodiment:

[0038] Figure 1 This is an isometric view of the crankshaft clamping device of this utility model. Figure 2 for Figure 1 A magnified view at point A. (See image below.) Figures 1-2As shown, the crankshaft clamping device is used for engine components, which include a crankshaft, an oil seal, and an engine housing. The installation sequence is as follows: first, the oil seal is clamped onto the oil seal mounting point of the crankshaft; then, the crankshaft end extends out of the crankshaft port of the engine housing and is clamped into the crankshaft port.

[0039] The crankshaft pressing device includes a machine base 1, a first roller 2, and a pressing mechanism 3. The machine base 1 has an inner cavity at its bottom and is equipped with a mounting platform 11 and a base 12. The mounting platform 11 is located at the top of the machine base 1, and the base 12 is located at the bottom of the inner cavity. The surface of the mounting platform 11 has a through hole 13, and an oil seal groove 14 is formed on the mounting platform 11. The oil seal groove 14 is located outside the first hole 13, and the oil seal is inserted into the oil seal groove 14. The bottom end of the first roller 2 is mounted on the base 12, and the top end of the first roller 2 extends out of the first hole 13 and is screwed onto the crankshaft end. The pressing mechanism 3 is mounted on the base 12. The pressing mechanism 3 includes a first pressing member 31 and a first cylinder 32. The first pressing member 31 has a through second hole 33. The first pressing member 31 is sleeved on the outside of the first rod body 2. The first pressing member 31 moves up and down in the first hole 13. The top end of the first rod body 2 passes through the second hole 33 and moves up and down in the second hole 33. The piston rod of the first cylinder 32 is located at the bottom of the first pressing member 31, lifting or lowering the first pressing member 31.

[0040] Figure 3 This is a top view of the crankshaft pressing device of this utility model. Figure 4 This is a front view schematic diagram of the pressing mechanism and the tightening mechanism in the crankshaft tightening device of this utility model. Figure 5 This is a vertical sectional view of the pressing mechanism and the tightening mechanism in the crankshaft tightening device of this utility model. Figures 3-5As shown, further, a screw hole 21 is provided at the top end of the first rod body 2. The crankshaft tightening and pressing device includes a tightening mechanism 4, which includes a second cylinder 41, a motor 42, and a hollow cylinder 43. The bottom end of the second cylinder 41 is fixed to the top end of the base 12, and the upper end of the second cylinder 41 is provided with a first fixing plate 44. The top end of the second cylinder 41 has a guide sleeve 411, which is fitted outside the piston rod of the second cylinder 41. The guide sleeve 411 and the piston rod of the second cylinder 41 pass through the first fixing plate 44. A first bearing 46 is fixedly sleeved on the outer side of the bottom end. A motor 42 is mounted on the side of a first fixed plate 44. The bottom of the inner side of the hollow cylinder 43 is engaged with the outer side of the first bearing 46. A transmission belt 47 is sleeved on the output end of the motor 42 and the outer side of the hollow cylinder 43. A sliding groove 431 is opened on the outer side of the hollow cylinder 43. The bottom end of the first rod 2 extends into the hollow cylinder 43. The piston rod of the second cylinder 41 is located at the bottom end of the first rod 2. A second rod 22 is provided on the outer side of the bottom of the first rod 2. The second rod 22 is engaged in the sliding groove 431 and moves up and down in the sliding groove 431. For example, a second bearing 48 is fixedly provided on the outer side of the top end of the hollow cylinder 43, and a second fixing plate 49 is fixedly provided on the outer side of the second bearing 48. A fixing column 45 is also provided on the top end of the first fixing plate 44. The fixing column 45 is fixedly connected to the first fixing plate 44 and the second fixing plate 49. A tightening mechanism 4 is provided. Through the coordinated rotation of the motor 42, the hollow cylinder 43 and the first roller 2, the top end of the first roller is automatically screwed to the crankshaft head, which improves the efficiency of production assembly, reduces manual operation time, and completes the tightening process quickly and efficiently, making the assembly line more efficient.

[0041] like Figures 3-5 As shown, the first cylinder 32 is further fixed to the lower end of the second fixed plate 49, the piston rod of the first cylinder 32 passes through the second fixed plate 49, the bottom of the first pressing member 31 is fixedly connected to the base plate 34, the piston rod of the first cylinder 32 lifts or lowers the base plate 34, the bottom end of the base plate 34 is also provided with a first guide tube 35, the fixed column 45 passes through the second fixed plate 49, the first guide tube 35 and the base plate 34 in sequence and is fixedly connected to the mounting platform 11, the first guide tube 35 is set to guide the base plate 34 to move along the height direction of the fixed column 45, to ensure that it moves along the correct path during the assembly process and to prevent the parts from deviating from the predetermined installation position.

[0042] like Figure 1As shown, the crankshaft clamping device further includes a laser marking device 5. The laser marking device 5 includes a control console 51 and a laser marking machine 52. The laser marking machine 52 is slidably located behind the machine base 1, with its output end facing the crankshaft. The control console 51 is located at the top of the laser marking machine 52 and is electrically connected to the laser marking machine 52. Through the integration of the laser marking device 5, the marking process can be automated, reducing manual intervention, improving the working efficiency of the production line, and reducing errors or inconsistencies that may be caused by manual marking.

[0043] In operation, this embodiment is as follows:

[0044] Place the oil seal on the oil seal groove 14, align the crankshaft end with the top of the first roller 2, start the motor 42, and the output end of the motor 42 drives the hollow cylinder 43 to rotate rapidly via the transmission belt 47. Since the second roller 22 extends into the slide groove 431, the hollow cylinder 43 drives the first roller 2 to rotate synchronously, so that the crankshaft end is screwed into the screw hole 21. Start the second cylinder 41, and the piston rod of the second cylinder 41 retracts downward. The first roller 2 moves downward along the second hole 33, so that the oil seal installation point of the crankshaft fits the oil seal. Start the first cylinder 32, the first... The piston rod of cylinder 32 extends upward, and the piston rod of the first cylinder 32 lifts the base plate 34, causing the first pressing member 31 to move along the height direction of the first roller body 2. The first pressing member 31 lifts the oil seal and presses it into the oil seal installation position of the crankshaft. The piston rod of the first cylinder 32 retracts downward, causing the first pressing member 31 to descend with the piston rod of the first cylinder 32, completing the oil seal installation operation. At the same time, the control console 51 controls the laser marking machine 52 to perform marking work on the crankshaft, using a laser beam to engrave QR codes, barcodes or additional production information on the metal surface of the crankshaft.

[0045] In this embodiment, a first hole 13, an oil seal groove 14, and a first pressing member 31 are provided. The first pressing member 31 is sleeved on the outside of the first roller body 2 and moves up and down in the first hole 13. The first cylinder 32 drives the first pressing member 31 to press the oil seal in the oil seal groove 14 onto the crankshaft rigidly connected to the first roller body 2, ensuring coaxiality during installation, improving the accuracy of oil seal and crankshaft installation, and improving work efficiency.

[0046] Second embodiment:

[0047] Based on the first embodiment, the second embodiment further optimizes and refines the machine tool 1 of the first embodiment.

[0048] like Figures 3-5As shown, the crankshaft pressing device further includes a second pressing member 6, which includes a top plate 61 and a third cylinder 62. The top plate 61 is located at the top of the machine base 1 and has a through third hole 63. The mounting platform 11 is located in the third hole 63. The third cylinder 62 is located at the top of the inner cavity, and the piston rod of the third cylinder 62 passes through the top surface of the machine base 1 and connects to the top plate 61, lifting or lowering the top plate 61. For example, the second pressing member 6 also includes a guide post 64, which is located at the bottom of the top plate 61. A second guide tube 65 is also provided at the lower end of the top surface of the machine base 1. The guide post 64 passes through the top surface of the machine base 1 and the second guide tube 65 in sequence, ensuring smooth axial movement of the third cylinder 62 in lifting the top plate 61. By lifting the engine housing with the second pressing member 6, the crankshaft can be installed on the engine housing simultaneously with the oil seal installation, reducing operational steps, improving assembly line efficiency, and shortening the production cycle.

[0049] like Figure 1 As shown, the crankshaft pressing device further includes a positioning mechanism 7, which is located at the top of the machine base 1. The positioning mechanism 7 includes a slide rail 71, a slider 72, a lead screw 73, and a positioning plate 74. The two ends of the lead screw 73 are fixed to the top of the machine base 1. The two slide rails 71 are located at the top of the machine base 1 and on both sides of the lead screw 73. The bottom of the positioning plate 74 is provided with a fixing block that is threadedly connected to the lead screw 73. The slider 72 is located at the top of the positioning plate 74 and on both sides of the fixing block of the positioning plate 74. The bottom of the slider 72 is slidably connected to the top of the slide rail 71. Rotating the lead screw 73 causes the lead screw 73 and the fixing block of the positioning plate 74 to generate threaded displacement, driving the positioning plate 74 to move closer to or away from the crankshaft. By positioning the engine housing in the positioning mechanism 7, the installation position of the engine housing can be accurately determined, ensuring that each component can be accurately aligned and positioned during installation, reducing errors during installation, thereby ensuring the precision assembly of the crankshaft and the engine housing, and improving the overall performance and reliability of the engine.

[0050] In operation, this embodiment is as follows:

[0051] Place the oil seal on the oil seal groove 14, apply lubricating oil to the crankshaft opening of the engine housing, place the engine housing on the top plate 61, with the crankshaft opening of the engine housing corresponding to the mounting platform 11 and engaging in the groove formed by the third hole 63 and the mounting platform 11. Rotate the lead screw 73 to drive the positioning plate 74 to move towards the engine housing and fix the engine housing. The crankshaft is pre-installed into the engine housing, with the crankshaft end aligned with the top of the first roller 2. Start the motor 42, and the output end of the motor 42 drives the hollow cylinder 43 to rotate rapidly via the transmission belt 47. Since the second roller 22 extends into the slide groove 431, the hollow cylinder 43 drives the first roller 2 to rotate synchronously, so that the crankshaft end is screwed into the screw hole 21. Start the second cylinder 41, and the piston rod of the second cylinder 41 retracts downward. The first roller 2 moves downward along the second hole 33, so that the oil seal mounting point of the crankshaft fits against the oil seal. Start the first cylinder 41. Cylinder 32, the piston rod of the first cylinder 32 extends upward, and the piston rod of the first cylinder 32 lifts the base plate 34, causing the first pressing member 31 to move upward along the first roller body 2. The first pressing member 31 lifts the oil seal and presses it into the oil seal mounting position of the crankshaft. The third cylinder 62 is started, the piston rod of the third cylinder 62 extends upward, lifts the top plate 61, and the engine housing moves upward relative to the crankshaft, so that the crankshaft is engaged in the crankshaft port of the engine housing. The piston rod of the second cylinder 41 retracts downward, so that the top plate 61 descends with the piston rod of the second cylinder 41. The piston rod of the first cylinder 32 retracts downward, so that the first pressing member 31 descends with the piston rod of the first cylinder 32, completing the installation operation of the oil seal and the engine housing. At the same time, the control console 51 controls the laser marking machine 52 to mark the crankshaft, using a laser beam to engrave QR codes, barcodes or additional production information on the metal surface of the crankshaft.

[0052] In this embodiment, a second pressing component 6 and a positioning mechanism 7 are provided. The second pressing component 6 lifts the engine housing, enabling the installation of the oil seal and the crankshaft to be installed on the engine housing simultaneously. This reduces operational steps, improves assembly line efficiency, and shortens the production cycle. The positioning mechanism 7 positions the engine housing to accurately determine its installation location, ensuring that all components can be accurately aligned and positioned during installation. This reduces errors during installation, thereby guaranteeing the precision assembly of the crankshaft and the engine housing, and improving the overall performance and reliability of the engine. By providing a first pressing component 31 and a second pressing component 6, the use of multiple independent devices is avoided, simplifying the equipment structure, reducing space occupation, and improving the integration of the equipment.

[0053] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0054] The embodiments described above are merely illustrative of several implementations of this utility model, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A device for pressing a crankshaft into place, characterized in that It includes: The machine table (1) has an inner cavity at the bottom, and is provided with a mounting table (11) and a base (12). The mounting table (11) is located at the top end of the machine table (1), and the base (12) is located at the bottom end of the inner cavity. The surface of the mounting table (11) has a first hole (13) penetrating through it. An oil seal groove (14) is formed in the mounting table (11) and located outside the first hole (13). An oil seal is inserted into the oil seal groove (14); A first rod body (2) is arranged at the bottom of the base (12). The top end of the first rod body (2) extends out of the first hole (13) and is screwed to the shaft head of the crankshaft; A press-fitting mechanism (3) is arranged on the base (12). The press-fitting mechanism (3) includes: A first pressing member (31) has a second hole (33) penetrating through it. The first pressing member (31) is arranged outside the first rod body (2). The first pressing member (31) moves up and down in the first hole (13). The top end of the first rod body (2) penetrates through the second hole (33) and moves up and down in the second hole (33); A first cylinder (32) is arranged. The piston rod of the first cylinder (32) is located at the bottom of the first pressing member (31). The first pressing member (31) is lifted or lowered.

2. The crankshaft tension press assembly of claim 1, wherein: The top end of the first rod body (2) is provided with a threaded hole (21). The tightening mechanism (4) includes: A second cylinder (41) is arranged. The bottom end of the second cylinder (41) is fixed to the top end of the base (12). The top end of the second cylinder (41) is provided with a first fixed plate (44). The top end of the second cylinder (41) has a guide sleeve (411). The guide sleeve (411) is arranged outside the piston rod of the second cylinder (41). The guide sleeve (411) of the second cylinder (41) penetrates through the first fixed plate (44) together with the piston rod. The bottom end of the guide sleeve (411) of the second cylinder (41) is fixedly provided with a first bearing (46) outside; An electric motor (42) is arranged on the side of the first fixed plate (44); A hollow cylinder (43) is arranged. The inside of the hollow cylinder (43) is connected to the outside of the first bearing (46). The output end of the electric motor (42) is connected to the outside of the hollow cylinder (43) through a transmission belt (47). The outside of the hollow cylinder (43) is provided with a sliding groove (431). The bottom end of the first rod body (2) extends into the hollow cylinder (43). The piston rod of the second cylinder (41) is located at the bottom end of the first rod body (2). The bottom end of the first rod body (2) is provided with a second rod body (22). The second rod body (22) is inserted into the sliding groove (431) and moves up and down in the sliding groove (431).

3. The crankshaft tension press assembly of claim 2, wherein: The hollow cylinder (43) top outside fixedly provided with the second bearing (48), the outside of the second bearing (48) is fixedly provided with the second fixed plate (49), the first fixed plate (44) top is also provided with fixed column (45), the fixed column (45) is fixedly connected with the first fixed plate (44) and the second fixed plate (49).

4. The crankshaft tension press assembly of claim 3, wherein: The first cylinder (32) is fixed to the lower end of the second fixed plate (49), the piston rod of the first cylinder (32) passes through the second fixed plate (49), the bottom of the first top pressure (31) is fixedly connected with the bottom plate (34), the piston rod of the first cylinder (32) lifts or lowers the bottom plate (34), the bottom plate (34) bottom is also provided with first guide pipe (35), the fixed column (45) passes through second fixed plate (49), first guide pipe (35) and bottom plate (34) in turn and is fixedly connected with the mounting table (11).

5. The crankshaft tension press assembly of claim 1, wherein: The crankshaft tightening and pressing device also includes a second top pressure (6), the second top pressure (6) includes top plate (61) and third cylinder (62), the top plate (61) is arranged at the top end of the machine table (1), the top plate (61) has a third hole (63) passing through, the mounting table (11) is located in the third hole (63), the third cylinder (62) is arranged at the top end of the inner cavity, the piston rod of the third cylinder (62) passes through the top surface of the machine table (1) and connects the top plate (61), and the top plate (61) is lifted or lowered.

6. The crankshaft tension press assembly of claim 5, wherein: The second top pressure (6) also includes guide column (64), the guide column (64) is arranged at the bottom end of the top plate (61), and the lower end of the top surface of the machine table (1) is also provided with second guide pipe (65), the guide column (64) passes through the top surface of the machine table (1) and the second guide pipe (65) in turn.

7. The crankshaft tension press assembly of claim 5, wherein: The crankshaft tightening and pressing device also includes a positioning mechanism (7), the positioning mechanism (7) is arranged at the top end of the machine table (1), the positioning mechanism (7) includes slide rail (71), sliding block (72), screw rod (73) and positioning plate (74), the screw rod (73) is fixed at both ends of the top end of the machine table (1), two slide rails (71) are arranged at the top end of the machine table (1) and located at both sides of the screw rod (73), the bottom end of the positioning plate (74) is provided with a fixed block and is threadedly connected with the screw rod (73), the sliding block (72) is arranged at the bottom end of the positioning plate (74) and located at both sides of the fixed block of the positioning plate (74), the bottom end of the sliding block (72) is slidably connected with the top end of the slide rail (71), and rotating the screw rod (73) drives the positioning plate (74) to displace towards the direction of approaching or away from the crankshaft by the threaded displacement of the screw rod (73) and the fixed block of the positioning plate (74).

8. The crankshaft tension press assembly of claim 1, wherein: The crankshaft pressing device further comprises a laser marking device (5), the laser marking device (5) comprises a control console (51) and a laser marking machine (52), the laser marking machine (52) is slidably arranged at the rear of the machine table (1), the output end of the laser marking machine (52) faces the crankshaft, the control console (51) is arranged at the top end of the laser marking machine (52), and the control console (51) is electrically connected with the laser marking machine (52).

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