Crankshaft transfer support

Abstract

The application provides a crankshaft transfer support, which is suitable for the technical field of part placement and transfer and aims to provide the crankshaft transfer support.The crankshaft transfer support is composed of a bottom frame, three support frames and three upper covers.The bottom frame and the support frame at one end are an integral whole, and the other two support frames are movable support frames which can be fastened by bolts according to the different positions of the crankshafts of different lengths.The upper cover is installed on the support frame, the position of the upper cover in contact with the crankshaft is adjusted up and down by a screw rod, the crankshaft transfer support is suitable for crankshafts of various diameters, and a lifting ring is welded on the crankshaft transfer support.The bottom frame has six supporting feet, is provided with leveling screws and has four lifting rings.The crankshaft transfer support can effectively solve the problems of the placement and transportation of crankshafts of different types and is suitable for the field of part placement and transfer.

Description

Technical Field

[0001] This invention relates to the technical field of machining and assembly, and in particular to a crankshaft transfer bracket. Background Technology

[0002] During diesel engine assembly, the crankshaft requires procedures such as visual cleaning, quality inspection, and transportation. The crankshaft itself weighs over ten tons and contains multiple main bearing journals, crank pin journals, and other components. The original fixture consisted of three simple V-shaped angle iron supports. These supports were not fixed at the bottom and were positioned on the journals, resulting in only hard friction during crankshaft rotation. This could easily cause wear on the working surfaces or lead to more serious component quality problems. Furthermore, routine crankshaft cleaning, inspection, and transportation could damage the crankshaft, or make effective cleaning impossible, thus affecting component assembly quality and production schedules.

[0003] Therefore, it is necessary to provide a new crankshaft transfer bracket to solve the above-mentioned technical problems. Summary of the Invention

[0004] The present invention aims to provide a crankshaft transfer bracket to solve the following technical problems existing in existing crankshaft placement and transfer fixtures (such as simple V-shaped angle iron brackets): The bottom has no fixed structure, making it prone to shaking or even tipping over during placement and transportation, posing a safety hazard. When the crankshaft rotates, it rubs hard against the support components, which can easily damage the surface of the main journal and affect the assembly quality. The support structure is fixed and cannot be adjusted according to the crankshaft length and journal diameter, resulting in poor versatility. Oil stains are not easily removed during crankshaft cleaning, and there is a lack of reliable locking and lifting structures, making operation inconvenient and inefficient.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows: A crankshaft transfer bracket is characterized by comprising: a bottom frame, three support frames (i.e., support frame I, support frame II, and support frame III), and three top covers. The three top covers are mounted one-to-one on the three support frames.

[0006] The bottom frame includes a bottom frame body, multiple bottom frame lugs fixedly connected to both sides of the bottom frame body, and multiple leveling bolts evenly distributed along the length of the bottom frame body.

[0007] Bottom frame lifting lugs: used to connect to the lifting device to achieve the overall lifting and transfer of the entire bracket along with the crankshaft.

[0008] Leveling bolts: By rotating them, the contact height between the bracket and the ground can be adjusted, thereby adjusting the levelness of the bottom frame and ensuring that the crankshaft is placed stably and reliably.

[0009] Each of the support frames includes a support frame, two rubber rollers mounted on the support frame, and support frame lugs fixedly connected to both sides of the support frame.

[0010] Rubber rollers: Two rubber rollers are arranged in a V-shape on the upper part of the support frame to jointly support the main journal of the crankshaft. The rubber rollers include a metal hub and a wear-resistant rubber layer covering the outer circumference of the hub. They are rotatably mounted on the support frame by countersunk bolts. The head of the countersunk bolts does not protrude above the surface of the rubber layer to avoid scratching the journal.

[0011] Support frame lifting lugs: used for lifting the movable support frame individually, especially convenient for adjusting the movable support frame.

[0012] Support frame I: Its support frame is welded and fixed to one end of the bottom frame to form an integral structure, serving as a reference support.

[0013] Support frames II and III: Their support frames are slidably mounted on the bottom frame and can move along the length of the bottom frame. After moving into position, they are locked to the bottom frame in any adjustable position by fixing bolts.

[0014] Preferably, the upper surface of the bottom frame is provided with a guide groove extending along the length direction, and the bottom of the support frame of support frame II and support frame III is provided with a slider or guide key that cooperates with the guide groove. The fixing bolt passes through the support frame and abuts against the guide groove or is screwed into the positioning hole on the bottom frame to achieve locking.

[0015] Each top cover is detachably connected to the upper part of the support frame of the three support brackets by corresponding connecting bolts.

[0016] Each top cover has a threaded hole running vertically through it, and a clamping bolt is fitted into the threaded hole. A rubber pad is fixedly connected to the lower end of the clamping bolt. The clamping bolt and the threaded hole form a screw and nut pair. By rotating the clamping bolt, the vertical distance between the rubber pad and the crankshaft main journal can be adjusted, thereby clamping or loosening crankshafts of different diameters.

[0017] Each of the support frames has an oil groove hole that runs through the upper and lower surfaces of the support frame between two rubber rollers, which is used to collect and discharge oil during crankshaft cleaning and keep the working environment clean.

[0018] Preferably, there are four bottom frame lugs, which are symmetrically welded to both sides of the bottom frame.

[0019] Preferably, there are six leveling bolts, three on each side, evenly distributed on both sides of the bottom frame.

[0020] Preferably, the three support frames correspond to the three main journals on the crankshaft, wherein support frame I is located at one axial end of the crankshaft, and support frames II and III are slidably adjusted and locked in their corresponding positions on the bottom frame according to the length of the crankshaft and the spacing between the main journals.

[0021] The present invention also provides a method for crankshaft transport using the above-mentioned crankshaft transfer bracket, comprising the following steps: Step 1. Based on the length of the crankshaft and the axial spacing of the three main journals, slide support brackets II and III along the bottom frame to the corresponding positions, and tighten the fixing bolts to lock them in place.

[0022] Step 2. Hoist the crankshaft onto the rubber rollers of the three support frames, so that the three main journals of the crankshaft fall into the V-shaped support surfaces formed by the two rubber rollers of the three support frames respectively.

[0023] Step 3. Rotate the leveling bolts on the bottom frame to adjust the levelness of the bottom frame until the crankshaft is level.

[0024] Step 4. Install the three top covers onto the support frames of the three support brackets using connecting bolts.

[0025] Step 5. Rotate the clamping bolt downwards to press the rubber pad at the lower end of the clamping bolt against the main journal of the crankshaft, thereby stopping the crankshaft.

[0026] Step 6. Connect the lifting device to the bottom frame lifting lugs, lift the entire crankshaft transfer bracket together with the crankshaft and transfer it to the target position.

[0027] Compared with related technologies, the crankshaft transfer bracket provided by the present invention has the following beneficial effects: 1. The crankshaft transfer bracket can meet the crankshaft cleaning process of various models. The crankshaft can be rotated to the desired position at will, making the cleaning work convenient and safe.

[0028] 2. The crankshaft transfer bracket can meet the crankshaft transfer process of various models. The transfer bracket is stable and reliable, easy to adjust and transport, eliminates the risk of tipping over during the transfer process, and saves working time. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall front structure of the present invention; Figure 2 This is a schematic diagram of the overall side structure provided by the present invention; Figure 3 This is a schematic diagram of the overall top view structure of the present invention; Figure 4 This invention provides a structural schematic diagram of the connection between the support frame and the bottom frame; The following are the labels in the diagram: 1. Bottom frame; 2. Top cover; 3. Support frame I; 4. Support frame II; 5. Support frame III; 6. Clamping bolt; 7. Support frame lifting lug; 8. Connecting bolt; 9. Support frame; 10. Rubber roller; 11. Bottom frame; 12. Bottom frame lifting lug; 13. Leveling bolt; 14. Fixing bolt. Detailed Implementation

[0030] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0031] Please refer to the following: Figure 1 , Figure 2 , Figure 3 and Figure 4 This embodiment provides a crankshaft transfer bracket, mainly applicable to the placement, cleaning, inspection, and transfer processes of large diesel engine crankshafts. The bracket includes: a bottom frame 1, an upper cover 2, a support frame I 3, a support frame II 4, and a support frame III 5. There are three upper covers 2, each corresponding to one of the three support frames.

[0032] The bottom frame 1 includes a bottom frame 11. The bottom frame 11 is a rectangular frame structure welded from high-strength steel, which has sufficient rigidity and load-bearing capacity to withstand crankshaft loads of more than ten tons.

[0033] On both sides of the bottom frame 11, four bottom frame lifting lugs 12 are symmetrically welded. Each bottom frame lifting lug 12 has a lifting hole for a hook or rope to pass through, which is used to lift and transfer the entire transfer bracket together with the crankshaft.

[0034] Six leveling bolts 13 are evenly distributed on both sides of the bottom frame 11. In this embodiment, three leveling bolts 13 are provided on each side, located at both ends and the middle of the bottom frame 11, respectively. The leveling bolts 13 pass through threaded holes on the bottom frame 11, and their lower ends are supported on the ground or workbench. By rotating the leveling bolts 13, the overall levelness of the bracket can be finely adjusted to ensure that the crankshaft is placed stably and reliably, avoiding crankshaft tilting or additional stress caused by uneven ground.

[0035] The three support frames are support frame I3, support frame II4, and support frame III5. Each support frame includes a support frame 9 and related components mounted on it.

[0036] Support frame I3: Welded and fixed to the bottom frame 1 to form an integral structure. This support frame serves as a reference support and is located at one end of the bottom frame 1 (e.g., Figure 1 (As shown on the left end). The welded connection ensures the positional accuracy and load-bearing stability of the support frame.

[0037] Support brackets II4 and III5: These two support brackets are movable, installed on the upper surface of the bottom frame 1, and can slide along the length of the bottom frame 1. Specifically, the upper surface of the bottom frame 1 is provided with guide grooves or guide rails (not shown in the figure), and the bottom of support brackets II4 and III5 is provided with sliders or guide keys that cooperate with the grooves. According to the actual length of the crankshaft to be placed and the spacing (i.e., the opening size) of the three main journals on the crankshaft, the operator can manually push support brackets II4 and III5 to the appropriate position. After the position is adjusted, tighten the fixing bolts 14 to lock support brackets II4 and III5 onto the bottom frame 1 to prevent them from moving accidentally in subsequent operations.

[0038] Support frame lifting lugs 7: Two support frame lifting lugs 7 are welded to the support frame 9 of each support frame (including support frame I3, support frame II4, and support frame III5), arranged symmetrically. For support frames II4 and III5, due to their mobility and large weight, they can be easily lifted and moved individually using small lifting equipment (such as manual hoists) via the support frame lifting lugs 7. Adjusting their position requires no multiple people to move them, saving effort and ensuring safety. Although support frame I3 is welded to the bottom frame, its lifting lugs can also be used for auxiliary lifting or as backup lifting points.

[0039] Each support frame 9 of the support bracket is equipped with two rubber rollers 10. The rubber rollers 10 are fixed to the axle of the support frame 9 by countersunk bolts (not shown in the figure). The heads of the countersunk bolts do not protrude from the rubber surface to avoid scratching the crankshaft journals. The outer layer of the rubber roller 10 is made of wear-resistant rubber with a certain degree of hardness and elasticity, and the inner layer is a metal hub. The two rubber rollers 10 are arranged in a V-shape on the support frame 9, together forming a support surface for the crankshaft main journals.

[0040] After the crankshaft is hoisted and placed, the main journal of the crankshaft comes into contact with the rubber roller 10. Due to the certain coefficient of friction and elasticity of the rubber, it can provide sufficient support without damaging the journal surface. When it is necessary to rotate the crankshaft for cleaning or inspection, simply loosen the clamping mechanism of the upper cover 2 and rotate the crankshaft by hand or with a tool. The crankshaft can then easily roll on the rubber roller 10, achieving rotation at any angle, and completely avoiding the hard friction damage caused by traditional V-shaped iron frames.

[0041] Each support frame is equipped with a top cover 2. The top cover 2 has an arched or semi-circular structure, and its lower ends are detachably connected to the upper part of the support frame 9 via connecting bolts 8. Specifically, the top cover 2 has connecting lugs on both sides, and the support frame 9 has threaded holes at corresponding positions. The connecting bolts 8 pass through the connecting lugs and are screwed into the threaded holes to fix the top cover 2. When it is necessary to remove the crankshaft, the connecting bolts 8 can be loosened to remove the top cover 2 as a whole.

[0042] A clamping bolt 6 is located at the center of the top of the upper cover 2. The clamping bolt 6 has a trapezoidal thread or a fine thread, which mates with the threaded hole on the upper cover 2. Rotating the clamping bolt 6 allows it to move up and down. A rubber pad (not separately labeled in the figure) is fixed to the lower end of the clamping bolt 6 (i.e., the end that contacts the crankshaft journal). The rubber pad is fixed to the end of the clamping bolt 6 by countersunk screws or adhesive bonding.

[0043] Working principle: After the crankshaft is placed on the rubber rollers 10 of the support frame, the upper cover 2 is installed on the support frame, and then the clamping bolt 6 is rotated downwards to press the rubber pad against the upper surface of the crankshaft journal. Since the clamping bolt 6 is continuously adjustable, it can accommodate crankshaft journals of different diameters, and the rubber pad also protects the journal. When the crankshaft needs to be locked for transport or other fixed operations, tightening the clamping bolt 6 will reliably stop it; when the crankshaft needs to be rotated, slightly loosen the clamping bolt 6 to disengage the rubber pad from the journal, allowing the crankshaft to rotate freely. After rotating to the correct position, tighten the bolt again.

[0044] An oil groove hole (not shown in the figure) is provided in the middle of the support frame 9 of each support bracket (i.e., between the two rubber rollers 10). The oil groove hole runs through the upper and lower surfaces of the support frame 9 and corresponds to the oil collection area on the bottom frame 1 or the external oil receiving container. When cleaning the crankshaft, the flowing oil and cleaning fluid will drip down the crankshaft surface. The oil groove hole can guide these liquids out in time, preventing oil from accumulating on the support frame or contaminating the work area, and keeping the working environment clean.

[0045] The complete operation process of the crankshaft transfer bracket is described below with reference to this embodiment: Adjust the position of the support frame: Based on the length of the crankshaft to be processed and the spacing of the three main journals, lift the support frame II 4 and support frame III 5 with the support frame lifting lug 7 and slide them to the corresponding positions. Then tighten the fixing bolt 14 to lock the two onto the bottom frame 1.

[0046] Crankshaft hoisting: Using a workshop overhead crane or hoist, lift the crankshaft with a special crankshaft hoisting tool and slowly lower it so that the three main journals of the crankshaft are accurately placed on the rubber rollers 10 of the three support frames. Confirm that the crankshaft is placed stably.

[0047] Leveling bracket: Observe the horizontal state of the crankshaft. If necessary, finely adjust the level of the bracket by rotating the six leveling bolts 13 on the bottom frame 11 until the crankshaft is in a horizontal and untilted state.

[0048] Install and tighten the top covers: Place the three top covers 2 on their respective support frames and initially secure them with the connecting bolts 8. Then, rotate the clamping bolts 6 in sequence until the rubber pads lightly contact the crankshaft journal surface. If the crankshaft needs to be rotated for cleaning or inspection, keep the clamping bolts 6 in the loose position; if the crankshaft needs to be moved, tighten all the clamping bolts 6 to the appropriate torque to reliably clamp and stop the crankshaft.

[0049] Crankshaft Cleaning / Inspection: Loosen the clamping bolt 6, and the operator manually rotates the crankshaft. The crankshaft rolls smoothly on the rubber roller 10, easily allowing it to be rotated to any angle. Clean, wipe, or visually inspect the exposed surfaces. Oil generated during cleaning is drained through the oil groove holes on the support bracket. After cleaning, rotate the crankshaft to the desired angle and retighten the clamping bolt 6 to lock the crankshaft in place.

[0050] Overall Transfer: If the crankshaft needs to be transferred to the next process, there is no need to disassemble the crankshaft. Simply connect the lifting rope or hook to the four bottom frame lifting lugs 12 of the bottom frame 1, and use a crane to lift the entire transfer bracket together with the crankshaft, and move it smoothly to the destination. After arrival, lower the bracket, loosen the clamping bolts 6 and remove the top cover 2, and the crankshaft can be lifted out.

[0051] The above are merely embodiments of the present invention and do not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A crankshaft transfer bracket, characterized in that, include: A bottom frame (1), the bottom frame (1) including a bottom frame body (11), a plurality of bottom frame lugs (12) fixedly connected to both sides of the bottom frame body (11), and a plurality of leveling bolts (13) evenly distributed along the length of the bottom frame body (11); three support frames, namely support frame I (3), support frame II (4) and support frame III (5), each of the support frames including a support frame (9), two rubber rollers (10) mounted on the support frame (9), and support frame lugs (7) fixedly connected to both sides of the support frame (9), wherein the two rubber rollers (10) are arranged in a V-shape on the upper part of the support frame (9) for jointly supporting the main journal of the crankshaft; support frame I (3) The support frame (9) is welded and fixed to one end of the bottom frame (11); the support frames (9) of the support frame II (4) and the support frame III (5) are slidably installed on the bottom frame (11) and can move along the length direction of the bottom frame (11), and are locked to the bottom frame (11) in any adjustable position by fixing bolts (14); three upper covers (2), the upper covers (2) are detachably connected to the upper part of the support frame (9) of the three support frames by connecting bolts (8); each upper cover (2) is provided with a threaded hole that penetrates the upper cover (2) in the vertical direction, and a clamping bolt (6) is installed in the threaded hole, the lower end of the clamping bolt (6) is used to clamp the main journal of the crankshaft.

2. The crankshaft transfer bracket according to claim 1, characterized in that, The support frame (9) of the support frame I (3) and the bottom frame (11) are welded together to form an integral structure; the upper surface of the bottom frame (11) is provided with a guide groove extending along the length direction; the bottom of the support frame (9) of the support frame II (4) and the support frame III (5) is provided with a slider or guide key that cooperates with the guide groove; the fixing bolt (14) passes through the support frame (9) and abuts against the guide groove or is screwed into the positioning hole on the bottom frame (11) to achieve locking.

3. The crankshaft transfer bracket according to claim 1, characterized in that, The rubber roller (10) includes a metal hub and a wear-resistant rubber layer covering the outer periphery of the hub. The rubber roller (10) is rotatably mounted on the support frame (9) by countersunk bolts, and the head of the countersunk bolts is not higher than the outer surface of the wear-resistant rubber layer.

4. The crankshaft transfer bracket according to claim 1, characterized in that, The lower end of the clamping bolt (6) is fixedly connected to a rubber pad. The clamping bolt (6) and the threaded hole on the upper cover (2) form a screw and nut pair. By rotating the clamping bolt (6), the vertical distance between the rubber pad and the crankshaft main journal can be adjusted, thereby clamping or loosening crankshafts of different diameters.

5. The crankshaft transfer bracket according to claim 1, characterized in that, Each of the support frames (9) has an oil groove hole that runs through the upper and lower surfaces of the support frame (9) between two rubber rollers (10) for collecting and discharging oil during crankshaft cleaning.

6. The crankshaft transfer bracket according to claim 1, characterized in that, There are four bottom frame lugs (12), which are symmetrically welded to both sides of the bottom frame (11); there are six leveling bolts (13), three on each side, which are evenly distributed on both sides of the bottom frame (11).

7. The crankshaft transfer bracket according to claim 1, characterized in that, The three support frames correspond to the three main journals on the crankshaft, wherein support frame I (3) is located at one end of the crankshaft in the axial direction, and support frame II (4) and support frame III (5) are slidably adjusted and locked in the corresponding positions on the bottom frame (11) according to the length of the crankshaft and the spacing between the main journals.

8. A method for crankshaft transport using the crankshaft transport bracket according to any one of claims 1 to 7, characterized in that, The process includes the following steps: (1) According to the length of the crankshaft and the axial spacing of the three main journals, slide and adjust the support frame II (4) and support frame III (5) along the bottom frame (1) to the corresponding positions, and tighten the fixing bolts (14) to lock them; (2) Hoist the crankshaft onto the rubber rollers (10) of the three support frames, so that the three main journals of the crankshaft fall into the V-shaped support surface formed by the two rubber rollers (10) of the three support frames respectively; (3) Rotate the leveling bolts (13) on the bottom frame (11) respectively to adjust the levelness of the bottom frame (1) until the crankshaft is in a horizontal state; (4) Install the three top covers (2) onto the support frames (9) of the three support frames respectively through the connecting bolts (8); (5) Rotate the clamping bolts (6) downwards so that the rubber pads at the lower end of the clamping bolts (6) press against the main journals of the crankshaft to achieve crankshaft stop; (6) Connect the lifting device to the bottom frame lifting lug (12), lift the entire crankshaft transfer bracket together with the crankshaft and transfer it to the target position.

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