Crankshaft assembling and positioning tool

Abstract

The utility model relates to the technical field of machining equipment, in particular to a crankshaft assembling and positioning tool which comprises a moving part and a positioning part detachably connected with the moving part. The positioning component comprises a bottom plate, a positioning assembly fixedly arranged on the bottom plate and an abutting assembly. The positioning assembly comprises an outer ring and an inner ring which are fixedly arranged on the bottom plate, the outer ring is higher than the inner ring, the inner ring is sleeved with the outer ring, a gap is reserved between the outer wall of the inner ring and the inner wall of the outer ring, and a wavy positioning groove used for positioning a tooth crest on the shaft gear is fixedly formed in the inner ring; according to the scheme, the movable part is flexibly matched with the positioning groove in the positioning part, so that the crankshaft and the shaft gear are quickly assembled, and the working efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical processing equipment, in particular to a crankshaft assembly and positioning tool. Background Art

[0002] The crankshaft is the most important component in the engine. It bears the force from the connecting rod and converts it into torque, which is output through the crankshaft and drives other accessories on the engine. Figure 1 As shown, the crankshaft 1 includes a journal 11 located in the middle, two cranks 12 fixedly connected to the two ends of the journal 11, a front end 13 and an output end 14 fixedly connected to the two cranks 12. The shaft gear 2 is also a very important component in the engine. It is usually installed at the front end 13 of the crankshaft 1 for transmitting power and driving other engine accessories.

[0003] The assembly of shaft gears is an important part of engine assembly and requires special tooling. The tooling used by the inventor includes a placement table and a clamping block driven by a hydraulic cylinder. A circular placement groove for placing the shaft gears is fixed on the placement table. The assembly process is as follows: Figure 1 As indicated by the arrow, first place the shaft gear 2 horizontally in the placement groove on the placement table, then insert the front end 13 of the crankshaft 1 into the center hole of the shaft gear 2, and finally start the hydraulic cylinder to drive the clamping block to press down the output end 14 of the crankshaft 1 so that the crankshaft 1 and the shaft gear 2 are assembled into place.

[0004] The problem with the existing tooling is that the placement groove is not very effective in fixing and positioning the shaft gear. This is because the existing stamping positioning tooling is equipped with a spring to provide a buffering effect for the clamping block to protect the equipment when in use. However, during the process of the hydraulic cylinder driving the clamping block to press down, the floating of the spring can easily cause the shaft gear to deviate or rotate, resulting in assembly errors. Utility Model Content

[0005] The utility model provides a crankshaft assembly positioning tool, which can solve the technical problem that assembly errors are easily generated when the existing tool is used to assemble the crankshaft and the shaft gear.

[0006] This application provides the following technical solutions:

[0007] The crankshaft assembly positioning tool includes a moving part and a positioning part detachably connected to the moving part; the positioning part includes a base plate, a positioning component fixedly arranged on the base plate, and a tightening component; the positioning component includes an outer ring and an inner ring fixedly arranged on the base plate, the height of the outer ring is higher than the height of the inner ring and the outer ring is sleeved on the outside of the inner ring, a gap is retained between the outer wall of the inner ring and the inner wall of the outer ring, and a positioning groove for the tooth top on the positioning shaft gear is fixedly arranged on the inner ring, and the positioning groove is wavy.

[0008] Beneficial effects:

[0009] 1. Enhanced assembly precision and stability: The wavy positioning grooves match the tooth top profiles on the gears. Compared to conventional circular placement grooves, these grooves allow for more precise alignment during gear placement, reducing assembly errors due to positional deviations. The wavy positioning grooves also provide better support for the gears, working in conjunction with the clamping assembly to clamp the crankshaft from the side, thereby enhancing the stability of the gears and crankshaft during assembly. This increased stability reduces assembly errors due to positional deviations, thereby improving the quality of crankshaft and gear assembly.

[0010] 2. Enhanced flexibility of tooling: The setting of movable parts enhances the flexibility of tooling. Workers can move its position according to the actual situation and quickly position the shaft gears with the positioning grooves on the positioning parts. There is no need to waste time and effort in moving the shaft gears and crankshafts back and forth, thereby improving the work efficiency of assembling crankshafts and shaft gears.

[0011] 3. The tooling is highly versatile when used: the positioning components and the moving components are connected in a detachable manner, which makes it convenient for workers to replace the positioning components in time when assembling shaft gears of different types of crankshafts, and is conducive to improving the ability of the tooling to adapt to the assembly requirements of different types of shaft gears and crankshafts.

[0012] 4. Reduce the wear on the end face of the shaft gear during assembly: The purpose of setting the installation gap is to reserve installation space for the tooth top outside the positioning groove, and to minimize the contact area between the end face of the shaft gear and the top of the inner ring, thereby reducing the wear on the end face of the shaft gear during assembly.

[0013] Furthermore, as an improvement, the movable component is a cart with universal wheels.

[0014] Beneficial effects: Carts are relatively common and production units can modify existing carts, which is beneficial to cost control. The design of universal wheels allows the cart to turn freely, improving flexibility and maneuverability in narrow spaces.

[0015] Furthermore, as an improvement, the cart includes a frame, an upper tray and a lower tray fixedly connected to the frame, and guards are fixedly provided at the edges of the upper tray and the lower tray, and a base detachably connected to the positioning component is fixedly provided at the edge of the upper tray.

[0016] Beneficial effects: This solution sets up a double-layer pallet structure including an upper pallet and a lower pallet, which improves the ability of the tooling to load items. The setting of the fence can effectively prevent the loaded items from slipping, improving the safety during the loading process. The detachable connection between the base and the positioning parts is conducive to improving the ability of the tooling to adapt to the assembly process of different types of shaft gears and crankshafts.

[0017] Furthermore, as an improvement, a plurality of mounting holes are provided on the base, and a plurality of insertion rods that can be inserted into the mounting holes are provided on the bottom of the base plate, and the insertion rods and the mounting holes are clearance-matched.

[0018] Beneficial effects: The insertion rod and the mounting hole are detachably connected by plugging, the operation is simple and quick, the technical requirements for the operator are reduced, and the installation difficulty is reduced.

[0019] Furthermore, as an improvement, the clamping assembly includes a vertical plate fixedly arranged on the base plate and a push rod detachably connected to the vertical plate, wherein the push rod is a screw rod, and a plurality of threaded holes of different heights are opened on the vertical plate and can be threadedly connected to the push rod.

[0020] Beneficial effect: By opening several threaded holes of different heights on the vertical plate, the position of the push rod can be adjusted according to the crankshafts of different heights, thereby enhancing the adaptability of the tooling. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a schematic diagram of the assembly of the crankshaft and shaft gear;

[0022] Figure 2 This is an axonometric view of the first embodiment of the crankshaft assembly and positioning tool of the present invention;

[0023] Figure 3 for Figure 2 Axonometric view of the positioning component;

[0024] Figure 4 for Figure 3 A top view of

[0025] Figure 5 for Figure 4 AA cross-sectional view. DETAILED DESCRIPTION

[0026] The following is further described in detail through specific implementation methods:

[0027] The marks in the drawings of the specification include: crankshaft 1, journal 11, crank 12, front end 13, output end 14, shaft gear 2, tooth top 21, moving part 3, cart 31, frame 311, upper tray 312, lower tray 313, enclosure 314, base 315, universal wheel 316, positioning part 4, bottom plate 41, outer ring 42, inner ring 43, installation gap 44, protrusion 45, positioning groove 46, vertical plate 47, threaded hole 471, push rod 48, and insert rod 49.

[0028] Example 1

[0029] like Figure 2-5 As shown, the crankshaft 1 assembly positioning tool includes a moving part 3 and a positioning part 4 detachably connected to the moving part 3.

[0030] Moving part 3 Figure 2 As shown, a cart 31 with universal wheels 316 is used. The cart 31 includes a frame 311, an upper tray 312 and a lower tray 313 welded to the frame 311, and a fence 314 is fixedly provided on the edges of the upper tray 312 and the lower tray 313. A square base 315 for mounting the positioning component 4 is fixedly provided at the edge of the upper tray 312. The universal wheels 316 in this embodiment have a locking function. Since they are relatively common, their specific locking structure will not be repeated here.

[0031] Positioning component 4 Figure 3 The figure shows a base plate 41, a positioning assembly welded to the base plate 41, and a tightening assembly. The positioning assembly includes an outer ring 42 and an inner ring 43 welded to the top center of the base plate 41. The outer ring 42 and the inner ring 43 are both annular structures. The height of the outer ring 42 is higher than that of the inner ring 43 and the outer ring 42 is sleeved outside the inner ring 43. The inner diameter of the outer ring 42 is larger than the outer diameter of the inner ring 43, so that a gap is left between the outer wall of the inner ring 43 and the inner wall of the outer ring 42. For easy identification, the gap is named as follows: Figure 4 and Figure 5 As shown in the installation gap 44, a protrusion 45 is fixedly mounted on the inner ring 43. The protrusion 45 is integrally formed with the outer ring 42. The protrusion 45 has a wavy positioning groove 46 for locating the tooth tops 21 on the shaft gear 2. When installing the shaft gear 2 into the outer ring 42, the operator should align the tooth tops 21 on the shaft gear 2 with the positioning groove 46 and insert it. The purpose of providing the installation gap 44 is to reserve installation space for the tooth tops 21 outside the positioning groove 46 and to minimize the contact area between the end face of the shaft gear 2 and the top of the inner ring 43, thereby reducing wear on the end face of the shaft gear 2 during assembly.

[0032] The tightening assembly includes a vertical plate 47 of a rectangular structure fixedly set on the base plate 41, and a push rod 48 detachably connected to the vertical plate 47. In this embodiment, the push rod 48 is a screw rod, and three vertically arranged threaded holes 471 of different heights are opened on the vertical plate 47. The push rod 48 is threadedly connected to the threaded holes 471. The function of the push rod 48 is to tighten the journal 11 of the crankshaft 1 during assembly to prevent the crankshaft 1 from shaking. The staff can choose to install the push rod 48 in the appropriate threaded hole 471 according to the model of the crankshaft 1 to be assembled, that is, the position height of the journal 11.

[0033] Several through holes are opened on the base 315 as mounting holes, and an insertion rod 49 that can be inserted into the mounting hole is opened at each of the four corners of the bottom of the base plate 41. The insertion rod 49 and the mounting hole are clearance-matched to achieve a detachable connection between the moving part 3 and the positioning part 4.

[0034] The specific application process is as follows:

[0035] At the production site, the crankshafts 1 and shaft gears 2 are neatly placed on the shelves or stacked on the ground. Due to the large number, their positions are relatively scattered. When using the tooling, the staff first places a part of the shaft gears 2 on the upper tray 312 and the lower tray 313, and then uses the flexibility of the trolley 31 to move the tooling to the shelf close to the crankshaft 1. Then, pick up a shaft gear 2 in the upper tray 312 and place it in the outer ring 42. It should be noted that during the placement process, the upper part of the tooth top 21 of the shaft gear 2 should be aligned with the positioning groove 46 and inserted. After placement, the bottom surface of the shaft gear 2 is in close contact with the top surface of the inner ring 43. Then, pick up a crankshaft 1 on the shelf next to it, insert the front end 13 of the crankshaft 1 downward into the center hole of the shaft gear 2, and then use a tool such as a knock rod to tap the output end 14 of the crankshaft 1 to complete the assembly between the crankshaft 1 and the shaft gear 2. Finally, put the crankshaft 1 back to its original position on the shelf and assemble the next crankshaft 1.

[0036] The above is only an embodiment of the present invention. The present invention is not limited to the field involved in this implementation case. Common knowledge such as the specific structure and characteristics of the scheme is not described in detail here. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several modifications and improvements can be made, which should also be regarded as the scope of protection of the present invention. These will not affect the effect of the implementation of the present invention and the practicality of the patent. The scope of protection required by this application shall be based on the content of its claims, and the specific implementation methods and other records in the specification can be used to interpret the content of the claims.

Claims

1. Crankshaft assembly and positioning tool, characterized by: It includes a moving part and a positioning part detachably connected to the moving part; the positioning part includes a base plate, a positioning component fixedly arranged on the base plate, and a tightening component; the positioning component includes an outer ring and an inner ring fixedly arranged on the base plate, the height of the outer ring is higher than the height of the inner ring and the outer ring is sleeved on the outside of the inner ring, a gap is retained between the outer wall of the inner ring and the inner wall of the outer ring, and a positioning groove for positioning the tooth top on the shaft gear is fixedly arranged on the inner ring, and the positioning groove is wavy.

2. The crankshaft assembly and positioning tool according to claim 1, characterized in that: The moving part is a cart with universal wheels.

3. The crankshaft assembly and positioning tool according to claim 2, characterized in that: The cart includes a frame, an upper tray and a lower tray fixedly connected to the frame, enclosures are fixedly provided at the edges of the upper tray and the lower tray, and a base detachably connected to the positioning component is fixedly provided at the edge of the upper tray.

4. The crankshaft assembly and positioning tool according to claim 3, characterized in that: A plurality of mounting holes are provided on the base, and a plurality of insertion rods which can be inserted into the mounting holes are provided on the bottom of the base plate, and the insertion rods and the mounting holes are clearance-matched.

5. The crankshaft assembly and positioning tool according to claim 1 or 4, characterized in that: The clamping assembly includes a vertical plate fixedly arranged on the bottom plate and a support rod detachably connected to the vertical plate. The support rod is a screw rod. Several threaded holes of different heights are opened on the vertical plate and can be threadedly connected to the support rod.

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