Processing tool for assembling a crankshaft sprocket of a marine engine

Abstract

The present application relates to the machining tool for marine engine crankshaft sprocket assembly, including support seat, the crankshaft fixing seat of support seat top, still including the clamping piece of support seat rotation connection, the clamping piece is used to clamp and drive sprocket movement, fixedly arranged on the polishing assembly one of support seat, the polishing assembly one is used for polishing and cleaning the inner wall of sprocket and crankshaft contact, and the polishing assembly two of polishing assembly one is penetrated and is fixed with clamping piece and is connected, the present application is through clamping piece clamping sprocket, through driving piece drive clamping piece and polishing assembly two rotation, while polishing and cleaning the inner and outer wall of two mutual contact of sprocket and crankshaft, through the second telescopic piece drive polishing assembly two towards clamping piece movement, through clamping piece push sprocket movement, through positioning piece after positioning sprocket again, sprocket is assembled to crankshaft, automatic positioning, high degree of automation, a station can carry out multiple processing technology, simple and convenient operation.

Description

TECHNICAL FIELD

[0001] The application belongs to the technical field of crankshaft sprocket assembly, and particularly relates to a machining tool for assembling a crankshaft sprocket of a marine engine. BACKGROUND

[0002] The assembly of a crankshaft and a sprocket generally requires polishing and cleaning of the inner and outer wall surfaces in contact with each other of the crankshaft and the sprocket before installation to remove burrs, debris and other impurities, so as to facilitate subsequent installation, and manual measurement is required during the assembly process to align the mounting holes of the crankshaft and the sprocket with each other. In the prior art, the crankshaft is fixed in position by a clamp, the mounting holes of the sprocket and the crankshaft are aligned by measurement, the sprocket is clamped by the clamp, and the inner and outer wall surfaces in contact with each other of the crankshaft and the sprocket are polished and cleaned manually by the workers. After polishing, the sprocket is moved to be assembled on the crankshaft. In this process, the polishing of the crankshaft and the sprocket and the alignment of the mounting holes of the crankshaft and the sprocket with each other are completed manually, which has low automation degree, slow operation and processing speed, and brings many inconveniences to production. SUMMARY

[0003] The purpose of the present application is to provide a machining tool for assembling a crankshaft sprocket of a marine engine to solve the above problems.

[0004] The present application achieves the above-mentioned purpose by the following technical solutions:

[0005] The machining tool for assembling a crankshaft sprocket of a marine engine comprises a support seat, a crankshaft fixing seat arranged on the top of the support seat, and further comprises:

[0006] A clamping piece rotatably connected with the support seat, the clamping piece being used for clamping and moving the sprocket;

[0007] A polishing assembly one fixed on the support seat, the polishing assembly one being used for polishing and cleaning the inner wall in contact with the crankshaft;

[0008] A polishing assembly two fixedly connected with the clamping piece and penetrating through the polishing assembly one, the polishing assembly two being used for polishing and cleaning the outer wall in contact with the sprocket;

[0009] A driving piece arranged on the support seat, the driving piece being used for driving the clamping piece and the polishing assembly two to rotate together;

[0010] A second telescopic piece arranged on the support seat and rotatably connected with the polishing assembly two, the second telescopic piece being used for driving the polishing assembly two to move;

[0011] A positioning piece arranged in the mounting hole of the crankshaft, the positioning piece being used for positioning the sprocket.

[0012] As a further optimization of the present invention, the clamping member includes a frame, a rotating rod disposed on one side of the frame and rotatably connected to the support seat via a bearing, two lead screws symmetrically arranged and rotatably connected to the frame, a first synchronizing member disposed on the two lead screws, and a first servo motor connected to one of the lead screws.

[0013] The lead screw has connecting threads on both the upper and lower sections, and the two connecting threads are in opposite directions. Both connecting threads are connected to nut seats through ball nut pairs. There are sliding seats between the two upper nut seats and between the two lower nut seats. A clamping plate is slidably connected to the sliding seat. The frame is provided with a first telescopic member for pushing the clamping plate to move.

[0014] As a further optimization of the present invention, the grinding assembly includes a fixed cylinder that is fixedly connected to the support base and rotatably connected to the frame through a bearing, a first grinding component and a first cleaning component that are sequentially disposed at the end of the fixed cylinder away from the support base.

[0015] As a further optimization of the present invention, the second grinding component includes a movable rod that passes through the fixed cylinder and is fixed to the rotating rod by several snap-fit ​​parts, a bidirectional telescopic component located at one end of the movable rod near the crankshaft, two mounting plates located at the two movable ends of the bidirectional telescopic component, a second grinding component located on the opposite side of the two mounting plates, and a second cleaning component.

[0016] As a further optimization of the present invention, the snap-fit ​​component includes a first fixing groove formed on the rotating rod, a first spring disposed inside the first fixing groove, a first snap-fit ​​block connected to the first spring and slidably connected to the first fixing groove, and a first snap-fit ​​groove formed on the moving rod for snapping the first snap-fit ​​block.

[0017] The second telescopic component is fixedly mounted on the support base and rotatably connected to the moving rod via a bearing.

[0018] As a further optimization of the present invention, the driving component includes a second servo motor and a second synchronization component disposed between the output shaft of the second servo motor and the rotating rod.

[0019] As a further optimization of the present invention, the positioning component includes several connecting screws fixed in the crankshaft mounting holes, a second spring detachably connected inside the connecting screws, a positioning rod connected to the second spring and extending out of the connecting screws, a roller rotatably connected to the movable end of the positioning rod, and a connecting rod for connecting the positioning rod. Several snap-fit ​​components are provided between the connecting screws and the positioning rod.

[0020] The second snap-fit ​​component includes a second fixing groove on the connecting screw, a third spring inside the second fixing groove, a second snap-fit ​​block at the movable end of the third spring, and a second snap-fit ​​groove on the positioning rod for snapping the second snap-fit ​​block.

[0021] The beneficial effects of this invention are as follows:

[0022] 1) This invention uses a clamping component to hold the sprocket, and a driving component to drive the clamping component and the second grinding component to rotate. At the same time, the inner and outer walls of the sprocket and the crankshaft that are in contact with each other are ground and cleaned. The second telescopic component drives the second grinding component to move towards the clamping component, and the clamping component pushes the sprocket to move. The positioning component positions the sprocket and then assembles the sprocket onto the crankshaft. The positioning is automatic, the degree of automation is high, and multiple processing techniques can be performed at one station. The operation is simple and convenient.

[0023] 2) Before the sprocket and crankshaft are assembled, the present invention can drive the grinding component 2 to rotate together through the clamping component, thereby simultaneously grinding and cleaning the inner and outer walls of the two contacting parts of the sprocket and crankshaft. Furthermore, the clamping component can be rotated to align the mounting holes of the sprocket and crankshaft, so as to facilitate subsequent installation. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the overall structure of the present invention.

[0025] Figure 2 This is a front view of the clamping member, grinding component one, grinding component two, driving member, third telescopic member, and positioning member of the present invention.

[0026] Figure 3 This is a front sectional view of a portion of the structure of the moving rod and rotating rod of the present invention.

[0027] Figure 4 This is a front sectional view of the positioning component of the present invention.

[0028] Figure 5 This is the invention Figure 4 Enlarged view of the structure of part A.

[0029] Figure 6 This is a side view of the positioning element of the present invention.

[0030] In the diagram: 1. Support base; 2. Clamping component; 21. Frame; 22. Rotating rod; 221. First fixing groove; 222. First spring; 223. First snap-fit ​​block; 23. Lead screw; 24. Nut seat; 25. Sliding seat; 26. Clamping plate; 27. First telescopic component; 28. First servo motor; 29. ​​First synchronizing component; 3. Grinding assembly one; 31. Fixed cylinder; 32. First grinding component; 33. First cleaning component; 4. Grinding assembly two; 41. Moving rod; 411. First snap-fit ​​groove; 42. Bidirectional telescopic component; 43. Mounting plate; 44. Second grinding component; 45. Second cleaning component; 5. Drive component; 51. Second servo motor; 52. Second synchronization component; 6. Second telescopic component; 7. Positioning component; 71. Connecting screw; 72. Positioning rod; 73. Second spring; 74. Roller; 75. Connecting rod; 76. Second fixing groove; 77. Third spring; 78. Second snap-fit ​​block; 79. Second snap-fit ​​groove; 8. Crankshaft fixing seat. Detailed Implementation

[0031] The present application will now be described in further detail with reference to the accompanying drawings. It should be noted that the following specific embodiments are only used to further illustrate the present application and should not be construed as limiting the scope of protection of the present application. Those skilled in the art can make some non-essential improvements and adjustments to the present application based on the above application content.

[0032] like Figures 1-6 As shown, the machining fixture for assembling the crankshaft sprocket of a marine engine includes a support base 1, a crankshaft fixing base 8 located on top of the support base 1, and further includes:

[0033] A clamping member 2 is rotatably connected to the support base 1, and the clamping member 2 is used to clamp and drive the sprocket to move;

[0034] A grinding component 3 is fixedly mounted on the support base 1. The grinding component 3 is used to grind and clean the inner wall where the sprocket contacts the crankshaft.

[0035] A second grinding component 4 is engaged and fixed with the clamping component 2 and passes through the first grinding component 3. The second grinding component 4 is used to grind and clean the outer wall of the crankshaft in contact with the sprocket.

[0036] A driving component 5 is provided on the support base 1, and the driving component 5 is used to drive the clamping component 2 and the grinding assembly 4 to rotate together;

[0037] A second telescopic member 6 is provided on the support base 1 and rotatably connected to the second grinding assembly 4. The second telescopic member 6 is used to drive the second grinding assembly 4 to move.

[0038] A positioning element 7 is provided in the crankshaft mounting hole, and the positioning element 7 is used to position the sprocket.

[0039] Preferably, the clamping member 2 includes a frame 21, a rotating rod 22 disposed on one side of the frame 21 and rotatably connected to the support seat 1 via a bearing, two lead screws 23 symmetrically arranged and rotatably connected to the frame 21, a first synchronizing member 29 disposed on the two lead screws 23, and a first servo motor 28 connected to one of the lead screws 23.

[0040] The lead screw 23 has connecting threads on both its upper and lower sections, and the two connecting threads are in opposite directions. Both connecting threads are connected to nut seats 24 via ball nut pairs. Sliding seats 25 are provided between the two upper nut seats 24 and between the two lower nut seats 24. Clamping plates 26 are slidably connected to the sliding seats 25. The frame 21 is provided with a first telescopic member 27 for pushing the clamping plates 26 to move.

[0041] Preferably, the polishing assembly 3 includes a fixed cylinder 31 fixedly connected to the support base 1 and rotatably connected to the frame 21 via a bearing, a first polishing component 32 and a first cleaning component 33 sequentially disposed at the end of the fixed cylinder 31 away from the support base 1.

[0042] Preferably, the second polishing component 4 includes a movable rod 41 that passes through the fixed cylinder 31 and is fixed to the rotating rod 22 by several snap-fit ​​parts, a bidirectional telescopic component 42 located at one end of the movable rod 41 near the crankshaft, two mounting plates 43 located at the two movable ends of the bidirectional telescopic component 42, a second polishing component 44 located on the opposite side of the two mounting plates 43, and a second cleaning component 45.

[0043] Preferably, the first snap-fit ​​component includes a first fixing groove 221 formed on the rotating rod 22, a first spring 222 disposed inside the first fixing groove 221, a first snap-fit ​​block 223 connected to the first spring 222 and slidably connected to the first fixing groove 221, and a first snap-fit ​​groove 411 formed on the moving rod 41 for snapping the first snap-fit ​​block 223.

[0044] The second telescopic member 6 is fixedly mounted on the support base 1 and is rotatably connected to the moving rod 41 through a bearing.

[0045] Furthermore, after the two movable ends of the bidirectional telescopic member 42 are retracted, the sum of the thickness of the two mounting plates 43 and the distance between the two mounting plates 43 is less than the diameter of the first grinding member 32, so that the two mounting plates 43 can pass through the through hole in the middle of the sprocket.

[0046] Preferably, the driving component 5 includes a second servo motor 51 and a second synchronization component 52 disposed between the output shaft of the second servo motor 51 and the rotating rod 22.

[0047] It should be noted that, in this embodiment, the first synchronizing element 29 and the second synchronizing element 52 are both two synchronizing pulleys and a synchronizing belt disposed between the two synchronizing pulleys;

[0048] The first telescopic member 27 and the second telescopic member 6 are both unidirectional electric push rods, and the bidirectional telescopic member 42 is a bidirectional electric push rod;

[0049] The first cleaning component 33 and the second cleaning component 45 can be either a cleaning cloth or a cleaning sponge.

[0050] The first polishing component 32 and the second polishing component 44 are either polishing oilstones or polishing sandpaper.

[0051] Preferably, the positioning component 7 includes a plurality of connecting screws 71 fixed in the crankshaft mounting holes, a second spring 73 detachably connected inside the connecting screws 71, a positioning rod 72 connected to the second spring 73 and extending out of the connecting screws 71, a roller 74 rotatably connected to the movable end of the positioning rod 72, and a connecting rod 75 for connecting the positioning rod 72. A plurality of snap-fit ​​components are provided between the connecting screws 71 and the positioning rod 72.

[0052] The second snap-fit ​​component includes a second fixing groove 76 formed on the connecting screw 71, a third spring 77 disposed inside the second fixing groove 76, a second snap-fit ​​block 78 disposed at the movable end of the third spring 77, and a second snap-fit ​​groove 79 formed on the positioning rod 72 for snapping the second snap-fit ​​block 78.

[0053] In use, the crankshaft is placed on the crankshaft mounting seat 8, and the sprocket is placed between the two clamping plates 26. The first servo motor 28 drives the two lead screws 23 to rotate through the first synchronizing member 29. The rotation of the lead screws 23 drives the two sliding seats 25 and the clamping plates 26 to move closer to each other through the nut seat 24, thereby clamping and fixing the sprocket through the clamping plates 26. At this time, the first grinding member 32 is located in the through hole in the middle of the sprocket. The second telescopic member 6 pushes the second grinding assembly 4 closer to the crankshaft, causing the second grinding... The first grinding component 44, the second cleaning component 45, and the outer wall of the crankshaft that contacts the sprocket come into contact. The driving component 5 drives the clamping component 2 and the second grinding component 4 to rotate. The rotation of the clamping component 2 will polish the inner wall of the sprocket that contacts the crankshaft through the first grinding component 32, thereby removing the burrs on the inner wall of the sprocket that contacts the crankshaft. The rotation of the second grinding component 4 will polish and wipe the outer wall of the crankshaft that contacts the sprocket through the second grinding component 44, which can remove burrs and grinding debris to facilitate subsequent installation.

[0054] The second telescopic member 6 drives the moving rod 41 to move towards the clamping member 2. Then, the bidirectional telescopic member 42 drives the two mounting plates 43 to move closer to each other. Then, the first telescopic member 27 pushes the clamping plate 26 and the sprocket together towards the crankshaft. When the positioning rod 72 contacts the sprocket, the pushing of the clamping plate 26 stops. During the process of pushing the clamping plate 26 and the sprocket to move, the first cleaning member 33 can wipe clean the debris that has been ground off the inner wall of the sprocket and the crankshaft.

[0055] Then, drive component 5 drives clamping component 2 to rotate. When clamping component 2 rotates and positioning rod 72 encounters the mounting hole on sprocket, positioning rod 72 will extend into the mounting hole of sprocket under the elastic force of second spring 73. At the same time, drive component 5 is turned off, and clamping plate 26 and sprocket are pushed towards crankshaft by first telescopic component 27, thereby assembling sprocket onto crankshaft. Then, positioning rod 72 is removed, and nut is threaded onto connecting screw 71.

[0056] The embodiments described above are merely examples of several implementations of the present invention, and while the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these modifications and improvements all fall within the scope of protection of the present invention.

Claims

1. A machining fixture for assembling crankshaft sprockets in marine engines, comprising a support base (1) and a crankshaft fixing base (8) disposed on the top of the support base (1), characterized in that: Also includes: A clamping member (2) is rotatably connected to the support base (1), the clamping member (2) being used to clamp and drive the sprocket to move; A grinding assembly (3) is fixedly mounted on a support base (1). The grinding assembly (3) is used to grind and clean the inner wall of the sprocket that is in contact with the crankshaft. A second grinding component (4) is engaged and fixed with the clamping component (2) and passes through the first grinding component (3). The second grinding component (4) is used to grind and clean the outer wall of the crankshaft that is in contact with the sprocket. A drive member (5) is provided on the support base (1), the drive member (5) is used to drive the clamping member (2) and the grinding assembly (4) to rotate together; The clamping member (2) includes a frame (21), a rotating rod (22) located on one side of the frame (21) and rotatably connected to the support base (1) via a bearing, two lead screws (23) symmetrically arranged and rotatably connected to the frame (21), a first synchronizing member (29) located on the two lead screws (23), and a first servo motor (28) connected to one of the lead screws (23). The grinding assembly (3) includes a fixed cylinder (31) fixedly connected to the support base (1) and rotatably connected to the frame (21) via a bearing, a first grinding component (32) and a first cleaning component (33) sequentially disposed at the end of the fixed cylinder (31) away from the support base (1); The second polishing component (4) includes a moving rod (41) that passes through the fixed cylinder (31) and is fixed to the rotating rod (22) by several snap-fit ​​pieces, a bidirectional telescopic component (42) located at one end of the moving rod (41) near the crankshaft, two mounting plates (43) located at the two movable ends of the bidirectional telescopic component (42), a second polishing component (44) located on the opposite side of the two mounting plates (43), and a second cleaning component (45). A second telescopic member (6) is provided on the support base (1) and rotatably connected to the second grinding assembly (4). The second telescopic member (6) is used to drive the second grinding assembly (4) to move. A positioning element (7) is provided in the crankshaft mounting hole, the positioning element (7) being used to position the sprocket; The positioning component (7) includes several connecting screws (71) fixed in the crankshaft mounting hole, a second spring (73) detachably connected inside the connecting screw (71), a positioning rod (72) connected to the second spring (73) and extending out of the connecting screw (71), a roller (74) rotatably connected to the movable end of the positioning rod (72), and a connecting rod (75) for connecting the positioning rod (72). Several snap-fit ​​components are provided between the connecting screw (71) and the positioning rod (72).

2. The machining tooling for assembling crankshaft sprockets in marine engines according to claim 1, characterized in that: The lead screw (23) has connecting threads on both the upper and lower sections, and the two connecting threads are in opposite directions. Both connecting threads are connected to nut seats (24) through ball nut pairs. Sliding seats (25) are provided between the two upper nut seats (24) and between the two lower nut seats (24). A clamping plate (26) is slidably connected to the sliding seat (25). The frame (21) is provided with a first telescopic member (27) for pushing the clamping plate (26) to move.

3. The machining fixture for assembling crankshaft sprockets in marine engines according to claim 1, characterized in that: The snap-fit ​​component includes a first fixing groove (221) opened on the rotating rod (22), a first spring (222) disposed inside the first fixing groove (221), a first snap-fit ​​block (223) connected to the first spring (222) and slidably connected to the first fixing groove (221), and a first snap-fit ​​groove (411) opened on the moving rod (41) for snapping the first snap-fit ​​block (223). The second telescopic component (6) is fixedly mounted on the support base (1) and is rotatably connected to the moving rod (41) through a bearing.

4. The machining fixture for assembling crankshaft sprockets in marine engines according to claim 1, characterized in that: The drive unit (5) includes a second servo motor (51) and a second synchronization unit (52) disposed between the output shaft of the second servo motor (51) and the rotating rod (22).

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