A method for anti-collision assembly of a crankshaft and a crankcase

Abstract

A method for anti-collision assembly of a crankshaft and a crankcase, including a bottom plate. Vertical plates are respectively provided at the front end and the rear end of the bottom plate. A guide post is fixed on the vertical plate at the front end, and a guide sleeve is movably arranged on the guide post. A support post is fixedly provided on the vertical plate at the rear end, and a support hole is provided at the front end of the support post. The guide sleeve and the support hole are respectively used to support the front end and the rear end of the crankshaft; parallel guide rails are provided on the bottom plate, and a lifting seat is slidably arranged on the guide rails. The lifting seat is used to support the crankcase and drive the crankcase to move and lift. By respectively supporting the front end and the rear end of the crankshaft through the guide sleeve on the guide post and the support hole on the support post, and by lifting and supporting the crankcase through the lifting seat and driving the crankcase to move along the guide rails, during the process of assembling the crankshaft into the crankcase, it can effectively avoid the collision between the balance weight of the crankshaft and the crankcase, play a protective effect on both the balance weight and the crankcase, and moreover, reduce the assembly difficulty and improve the assembly efficiency.

Description

Technical Field:

[0001] The present invention relates to an anti-collision assembly method for a crankshaft and a crankcase. Background Art:

[0002] In a diaphragm compressor, its crankshaft is installed in the crankcase. Bearings are respectively sleeved at both ends of the crankshaft, and the bearings are respectively supported by bearing covers installed in the crankcase. During the process of installing the crankshaft into the crankcase, due to the large weight of the crankshaft, generally a crane is used to vertically lift the crankshaft now, and then workers manually control the crane to make the crankshaft pass through the opening of the crankcase for assembly. Since the balance weights of the crankshaft are eccentrically arranged, the balance weights are very likely to collide with the crankcase at the edge of the opening during the hoisting process, resulting in damage to the balance weights or the crankcase, affecting the product quality. The entire assembly process is difficult and inefficient, affecting the overall assembly speed of the diaphragm compressor.

[0003] In summary, the installation problem of the crankshaft and the crankcase in the diaphragm compressor has become a technical problem that urgently needs to be solved in the industry. Summary of the Invention:

[0004] In order to make up for the deficiencies of the prior art, the present invention provides an anti-collision assembly method for a crankshaft and a crankcase, which solves the problem that the balance weights of the previous crankshafts are easily damaged due to collision with the crankcase, and solves the problems of difficult and inefficient assembly process between the previous crankshaft and the crankcase.

[0005] The technical solution adopted by the present invention to solve the above technical problems is:

[0006] An anti-collision assembly method for a crankshaft and a crankcase, including a bottom plate. Vertical plates are respectively provided at the front end and the rear end of the bottom plate. A guide post is fixed on the vertical plate at the front end, and a guide sleeve is movably arranged on the guide post. A support post is fixed on the vertical plate at the rear end, and a support hole is provided at the front end of the support post. Parallel guide rails are provided on the bottom plate, and a lifting seat is slidably arranged on the guide rails. The specific assembly steps are as follows:

[0007] Step 1: Sleeve the rear bearing cover from the front end of the support post and move it to the rear end of the support post;

[0008] Step 2: Place the crankcase on the lifting seat, make the installation hole on the left side of the crankcase face the rear bearing cover, and the installation hole on the right side of the crankcase face the guide sleeve. Push the lifting seat to drive the crankcase to move leftward along the guide rail to the left, leaving a space between the support post and the guide post;

[0009] Step 3: Assemble the rear bearing, front bearing, and front bearing cover on the crankshaft in advance. Lift the crankshaft with a crane and place it between the support column and the guide column. Insert the rear end of the crankshaft into the support hole of the support column to support the rear end of the crankshaft. Move the guide sleeve along the guide column towards the crankshaft to fit the guide sleeve onto the front end of the crankshaft and support the front end of the crankshaft.

[0010] Step 4: Push the lifting seat to drive the crankcase to move right along the guide rail. When the crankcase moves to the position of the balance weight of the crankshaft, control the lifting seat to descend. The lifting seat drives the crankcase to descend, so that the balance weight of the crankshaft can smoothly pass through the right mounting hole of the crankcase, avoiding collision between the balance weight and the crankcase.

[0011] Step 5: Continue to push the lifting seat to drive the crankcase to move right until it stops at the front bearing cover, and then control the lifting seat to rise. The lifting seat drives the crankcase to rise and reset.

[0012] Step 6: Move the rear bearing cover along the support column to the left mounting hole of the crankcase, and connect and fix the rear bearing cover, front bearing cover and crankcase with bolts.

[0013] The following steps are also included:

[0014] Step 7: Move the guide sleeve away from the crankshaft to disengage the guide sleeve from the front end of the crankshaft. Then move the crankcase right to disengage the rear end of the crankshaft from the support hole of the support column. Lift the crankshaft and the crankcase with a crane and move them into the subsequent process.

[0015] The two vertical plates are arranged relatively parallel.

[0016] The vertical plate adopts a triangular vertical plate.

[0017] The guide sleeve is slidably matched with the guide column.

[0018] A stop step is arranged on the inner wall surface of the guide sleeve.

[0019] The axis of the support column is aligned with that of the guide column.

[0020] The lifting seat includes a lower connecting plate and an upper connecting plate. A slider is fixed at the bottom of the lower connecting plate, and the slider is slidably installed on the guide rail. A plurality of guide sleeves are fixed on the upper surface of the lower connecting plate, and a plurality of guide posts are fixed at the bottom of the upper connecting plate. The guide posts are slidably arranged in the guide sleeves. An elevator is arranged between the lower connecting plate and the upper connecting plate.

[0021] The elevator includes a worm and worm gear lifting mechanism or a lifting oil cylinder or a lifting air cylinder.

[0022] The worm and worm gear lifting mechanism includes a hand-operated worm and worm gear lifting mechanism or an electric worm and worm gear lifting mechanism.

[0023] The present invention adopts the above scheme and has the following advantages:

[0024] The front end and the rear end of the crankshaft are respectively supported by the guide sleeve on the guide post and the support hole on the support post. The crankcase is supported by the lifting seat and driven to move along the guide rail. The crankcase is driven by the lifting seat to rise and fall. During the assembly process of the crankshaft into the crankcase, the balance weight of the crankshaft can be effectively prevented from colliding with the crankcase, which plays a protective effect on both the balance weight and the crankcase, and reduces the assembly difficulty and improves the assembly efficiency. Brief Description of the Drawings:

[0025] Figure 1 It is a structural schematic diagram of the present invention.

[0026] Figure 2 It is a structural schematic diagram of the assembly process of the present invention.

[0027] Figure 3 It is a structural schematic diagram of the end of the assembly of the present invention.

[0028] Figure 4 It is a structural schematic diagram of the guide sleeve of the present invention.

[0029] In the figure, 1 is the bottom plate, 2 is the vertical plate, 3 is the guide post, 4 is the guide sleeve, 5 is the support post, 6 is the support hole, 7 is the crankshaft, 8 is the guide rail, 9 is the crankcase, 10 is the front bearing, 11 is the front bearing cover, 12 is the rear bearing, 13 is the rear bearing cover, 14 is the stop step, 15 is the lower connecting plate, 16 is the upper connecting plate, 17 is the slider, 18 is the guide sleeve, 19 is the guide post, 20 is the lifter. Detailed Embodiment:

[0030] To clearly illustrate the technical features of this solution, the present invention will be elaborated in detail below through specific embodiments and in combination with its drawings.

[0031] As Figures 1-4 shown, a method for anti-collision assembly of a crankshaft and a crankcase includes a bottom plate 1. Vertical plates 2 are respectively provided at the front end and the rear end of the bottom plate 1. A guide post 3 is fixed on the vertical plate 2 at the front end, and a guide sleeve 4 is movably provided on the guide post 3. A support post 5 is fixed on the vertical plate 2 at the rear end, and a support hole 6 is provided at the front end of the support post 5. Parallel guide rails 8 are provided on the bottom plate 1, and a lifting seat is slidably provided on the guide rails 8. The specific assembly steps are as follows:

[0032] Step 1: The rear bearing cover 13 is sleeved from the front end of the support post 5 and moved to the rear end of the support post 5.

[0033] Step 2: Place the crankcase 9 on the lifting seat, with the mounting holes on the left side of the crankcase 9 facing the rear bearing cover 13 and the mounting holes on the right side of the crankcase 9 facing the guide sleeve 4. Push the lifting seat to drive the crankcase 9 to move leftward along the guide rail 8 to the left side, leaving a space between the support column 5 and the guide column 3;

[0034] Step 3: Assemble the rear bearing 12, the front bearing 10, and the front bearing cover 11 on the crankshaft 7 in advance. Lift and place the crankshaft 7 between the support column 5 and the guide column 3 by a crane. Insert the rear end of the crankshaft 7 into the support hole 6 of the support column 5 to support the rear end of the crankshaft. Move the guide sleeve 4 along the guide column 3 towards the crankshaft direction so that the guide sleeve 4 sleeves onto the front end of the crankshaft 7 to support the front end of the crankshaft;

[0035] Step 4: Push the lifting seat to drive the crankcase 9 to move rightward along the guide rail 8. When the crankcase 9 moves to the position of the balance weight of the crankshaft 7, control the lifting seat to descend. The lifting seat drives the crankcase 9 to descend, so that the balance weight of the crankshaft 7 can smoothly pass through the right mounting hole of the crankcase 9, avoiding collision between the balance weight and the crankcase 9;

[0036] Step 5: Continue to push the lifting seat to drive the crankcase 9 to move rightward until it stops at the front bearing cover 11, and then control the lifting seat to rise. The lifting seat drives the crankcase 9 to rise and reset;

[0037] Step 6: Move the rear bearing cover 13 along the support column 5 to the mounting hole on the left side of the crankcase 9, and connect and fix the rear bearing cover 13, the front bearing cover 11, and the crankcase 9 with bolts.

[0038] The following steps are also included:

[0039] Step 7: Move the guide sleeve 4 in the direction away from the crankshaft 7 to disengage the guide sleeve 4 from the front end of the crankshaft. Then move the crankcase 9 rightward to disengage the rear end of the crankshaft from the support hole 6 of the support column 5. Lift and place the crankshaft 7 and the crankcase 9 into the subsequent process by a crane.

[0040] The two vertical plates 2 are arranged relatively parallel.

[0041] The vertical plate 2 adopts a triangular vertical plate, which has a stable structure and saves materials.

[0042] The guide sleeve 4 is slidably matched with the guide column 3.

[0043] The inner wall surface of the guide sleeve 4 is provided with a stop step 14 to prevent the guide sleeve from disengaging from the guide column.

[0044] The axes of the support column 5 and the guide column 3 are kept consistent.

[0045] The lifting seat includes a lower connecting plate 15 and an upper connecting plate 16. A slider 17 is fixed to the bottom of the lower connecting plate 15. The slider 17 is slidably mounted on the guide rail 8. A plurality of guide sleeves 18 are fixed to the upper surface of the lower connecting plate 15. A plurality of guide posts 19 are fixed to the bottom of the upper connecting plate 16. The guide posts 19 are slidably arranged in the guide sleeves 18. A lifter 20 is provided between the lower connecting plate 15 and the upper connecting plate 16.

[0046] The lifter 20 includes a worm and worm gear lifting mechanism, a lifting oil cylinder or a lifting air cylinder.

[0047] The worm and worm gear lifting mechanism includes a hand-operated worm and worm gear lifting mechanism or an electric worm and worm gear lifting mechanism.

[0048] Working principle:

[0049] During assembly, first, the rear bearing cover 13 is sleeved from the front end of the support column 5 and moved leftward to the rear end of the support column 5. Then, the crankcase 9 is placed on the lifting seat, with the mounting hole on the left side of the crankcase 9 facing the rear bearing cover 13 and the mounting hole on the right side of the crankcase 9 facing the guide sleeve 4. Push the lifting seat to drive the crankcase 9 to move leftward along the guide rail 8 to the left, leaving a space between the support column 5 and the guide post 3. Assemble the rear bearing 12, the front bearing 10, and the front bearing cover 11 on the crankshaft 7 in advance. The length of the crankshaft 7 is slightly less than the distance between the support column 5 and the guide post 3. Lift the crankshaft 7 by a crane and place it between the support column 5 and the guide post 3. Insert the rear end of the crankshaft 7 into the support hole 6 of the support column 5 to support the rear end of the crankshaft 7. Move the guide sleeve 4 along the guide post 3 towards the crankshaft 7 so that the guide sleeve 4 sleeves the front end of the crankshaft 7 to support the front end of the crankshaft 7, and the support work of the crankshaft 7 is completed. Then, push the lifting seat to drive the crankcase 9 to move rightward along the guide rail 8. When the crankcase 9 moves to the position of the balance weight of the crankshaft 7, the worker controls the lifter 20 to descend. The lifter 20 drives the guide post 19 to descend along the guide sleeve 18, thereby driving the upper connecting plate 16 and the crankcase 9 to descend a certain distance, so that the balance weight of the crankshaft 7 can smoothly pass through the right mounting hole of the crankcase 9 to avoid collision between the balance weight and the crankcase 9. Continue to push the lifting seat to drive the crankcase 9 to move rightward to the front bearing cover 11 and stop. Then, control the lifter 20 to rise. The lifter 20 drives the upper connecting plate 16 and the crankcase 9 to rise a certain distance to reset. Then, move the rear bearing cover 13 along the support column 5 to the mounting hole on the left side of the crankcase 9 and connect and fix the rear bearing cover 13, the front bearing cover 11 and the crankcase 9 with bolts. The crankshaft 7 and the crankcase 9 are connected and fixed together to complete the installation of the crankshaft 7. Finally, move the guide sleeve 4 away from the crankshaft 7 so that the guide sleeve 4 disengages from the front end of the crankshaft 7. Then, move the crankcase 9 rightward so that the rear end of the crankshaft 7 disengages from the support hole 6 of the support column 5. Lift the crankshaft 7 and the crankcase 8 by a crane and enter the subsequent process.

[0050] The above specific embodiments shall not be construed as limiting the scope of the present invention. For those skilled in the art of this technology, any alternative improvements or transformations made to the embodiments of the present invention fall within the scope of protection of the present invention.

[0051] Where the present invention is not described in detail, it is common knowledge to those skilled in the art of this technology.

Claims

1. A method for anti-collision assembly of a crankshaft and a crankcase, characterized in that: It includes a bottom plate. Vertical plates are respectively provided at the front end and the rear end of the bottom plate. A guiding column is fixed on the vertical plate at the front end, and a guiding sleeve is movably arranged on the guiding column. A supporting column is fixed on the vertical plate at the rear end, and a supporting hole is provided at the front end of the supporting column. Parallel guide rails are provided on the bottom plate, and a lifting seat is slidably arranged on the guide rails. The specific assembly steps are as follows: Step 1: Sleeve the rear bearing cover from the front end of the supporting column and move it to the rear end of the supporting column. Step 2: Place the crankcase on the lifting seat, with the mounting hole on the left side of the crankcase facing the rear bearing cover and the mounting hole on the right side of the crankcase facing the guiding sleeve. Push the lifting seat to drive the crankcase to move leftward along the guide rail to the left side, leaving a space between the supporting column and the guiding column. Step 3: Assemble the rear bearing, front bearing, and front bearing cover on the crankshaft in advance. Lift and place the crankshaft between the supporting column and the guiding column by a crane. Insert the rear end of the crankshaft into the supporting hole of the supporting column to support the rear end of the crankshaft. Move the guiding sleeve along the guiding column towards the crankshaft direction so that the guiding sleeve sleeves the front end of the crankshaft to support the front end of the crankshaft. Step 4: Push the lifting seat to drive the crankcase to move rightward along the guide rail. When the crankcase moves to the position of the balance weight of the crankshaft, control the lifting seat to descend. The lifting seat drives the crankcase to descend, so that the balance weight of the crankshaft smoothly passes through the right mounting hole of the crankcase, avoiding collision between the balance weight and the crankcase. Step 5: Continue to push the lifting seat to drive the crankcase to move rightward to the front bearing cover and stop. Then control the lifting seat to rise, and the lifting seat drives the crankcase to rise and reset. Step 6: Move the rear bearing cover rightward along the supporting column to the mounting hole on the left side of the crankcase, and connect and fix the rear bearing cover, front bearing cover and crankcase with bolts.

2. A method for anti-collision assembly of a crankshaft and a crankcase according to claim 1, characterized in that: It further includes the following steps: Step 7: Move the guiding sleeve away from the crankshaft direction so that the guiding sleeve disengages from the front end of the crankshaft. Then move the crankcase rightward so that the rear end of the crankshaft disengages from the supporting hole of the supporting column. Lift and hoist the crankshaft and the crankcase into the subsequent process by a crane.

3. A method for anti-collision assembly of a crankshaft and a crankcase according to claim 1, characterized in that: The two vertical plates are arranged relatively parallel.

4. A method for anti-collision assembly of a crankshaft and a crankcase according to claim 3, characterized in that: The vertical plate adopts a triangular vertical plate.

5. A method for anti-collision assembly of a crankshaft and a crankcase according to claim 1, characterized in that: The guiding sleeve is in sliding fit with the guiding column.

6. A method for anti-collision assembly of a crankshaft and a crankcase according to claim 5, characterized in that: A stopping step is provided on the inner wall surface of the guiding sleeve.

7. A method for anti-collision assembly of a crankshaft and a crankcase according to claim 1, characterized in that: The axes of the supporting column and the guiding column are kept consistent.

8. A method for anti-collision assembly of a crankshaft and a crankcase according to claim 1, characterized in that: The lifting seat includes a lower connecting plate and an upper connecting plate. A slider is fixed at the bottom of the lower connecting plate, and the slider is slidably installed on the guide rail. A plurality of guide sleeves are fixed on the upper surface of the lower connecting plate, and a plurality of guide columns are fixed at the bottom of the upper connecting plate. The guide columns are slidably arranged in the guide sleeves, and a lifter is provided between the lower connecting plate and the upper connecting plate.

9. A method for anti-collision assembly of a crankshaft and a crankcase according to claim 8, characterized in that: The lifter includes a worm and worm gear lifting mechanism or a lifting oil cylinder or a lifting air cylinder.

10. A method for anti-collision assembly of a crankshaft and a crankcase according to claim 9, characterized in that: The worm and worm gear lifting mechanism includes a hand-operated worm and worm gear lifting mechanism or an electric worm and worm gear lifting mechanism.

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