Large-cylinder-diameter diesel engine camshaft assembling and disassembling device

Abstract

The utility model discloses a large-cylinder-diameter diesel engine camshaft disassembling and assembling device which comprises a base, a supporting frame and an upper framework. A first lead screw and nut combination is longitudinally arranged in the middle of the outer end of the base. The upper framework is supported on the supporting frame, a cam shaft pushing mechanism is arranged on the upper framework and comprises a second lead screw and nut combination, a pair of sliding rails and a pair of sliding blocks, the second lead screw and nut combination is longitudinally arranged on the lower portion of one side of the upper framework, and the pair of sliding rails are longitudinally fixed to longitudinal beams on the two sides of the upper framework respectively. The pair of sliding blocks are supported on the pair of sliding rails in a sliding mode respectively, and the bottom of one sliding block is fixedly connected with the top of the second nut. The cam shaft mounting device is simple in structure, low in cost, time-saving and labor-saving in operation, high in working efficiency, safe, reliable, accurate in cam shaft positioning and high in mounting precision, and matching of multiple persons is not needed, and all operations can be completed by one person, and other parts do not need to be dismantled.

Description

TECHNICAL FIELD

[0001] The utility model relates to a kind of dismounting device of diesel engine camshaft, especially a kind of dismounting device of large-bore diesel engine camshaft, belong to diesel engine accessory technology field. BACKGROUND

[0002] With the market demand of large-scale container ship greatly increasing, the cylinder diameter of marine medium-speed diesel engine used is also larger and larger, and the cylinder diameter above φ320mm is large-bore diesel engine. When large-bore diesel engine is manufactured and assembled and the camshaft is replaced, the camshaft is large in volume and heavy in weight, and the installation space in the inner cavity of the frame is deep, so it is impossible to directly adopt manual assistance and vertical lifting for dismounting, and it is necessary to cooperate with multiple persons, remove the remaining parts, and fix and lift multiple times to complete the dismounting, which not only seriously affects the dismounting efficiency, but also has high safety hazards. CONTENT OF UTILITY MODEL

[0003] The utility model aims at providing a large-bore diesel engine camshaft dismounting device which is simple in structure, time-saving and labor-saving in operation, safe and reliable.

[0004] The utility model is implemented by the following technical solutions.

[0005] A large-bore diesel engine camshaft dismounting device, comprising a base, a support frame and an upper frame, a first screw nut combination is longitudinally arranged in the middle part of the outer end of the base, and the two ends of the first screw are respectively supported on the two horizontal plates at the outer end of the base; the support frame is arranged between the base and the upper frame, the upper frame is supported on the support frame, and a camshaft pushing mechanism is arranged on the upper frame; the camshaft pushing mechanism comprises a second screw nut combination, a pair of slide rails and a pair of sliding blocks; the second screw nut combination is longitudinally arranged on the lower part of one side of the upper frame, and the two ends of the second screw are respectively supported on the two end beams of the upper frame; the pair of slide rails are respectively fixed on the two side longitudinal beams of the upper frame; the pair of sliding blocks are respectively slidably supported on the pair of slide rails; and the bottom of one sliding block is fixedly connected with the top of the second nut.

[0006] The utility model can also be further implemented by the following technical measures.

[0007] The foregoing large-bore diesel engine camshaft dismounting device, wherein the support frame comprises an upper push rod, a lower push rod and two pairs of support rods; the upper push rod is horizontally arranged at the inner end of the upper frame, and the two ends of the upper push rod are respectively slidably supported in the upper sliding grooves on the two side longitudinal beams of the upper frame; the lower push rod is horizontally arranged at the outer end of the base, and the two ends of the lower push rod are respectively slidably supported in the lower sliding grooves on the two side longitudinal plates of the base, and the middle part of the lower push rod is fixedly connected with the outer circle of the first nut; the two pairs of support rods are respectively located at the two ends of the upper push rod and the lower push rod, and each pair of support rods is crossly hinged, the upper and lower ends of one support rod are respectively hinged with one end of the upper push rod and one end of the lower push rod, and the upper and lower ends of the other support rod are respectively hinged with the outer end of the upper frame and the inner end of the base.

[0008] The foregoing large-bore diesel engine camshaft dismounting device, wherein the outer end of the base is provided with a bayonet, and the two sides of the outer end of the base are respectively provided with connecting ear plates.

[0009] The foregoing large-bore diesel engine camshaft dismounting device, wherein the surface of the sliding block is a concave circular arc surface, and the curvature radius of the concave circular arc surface matches the radius of the camshaft journal.

[0010] The foregoing large-bore diesel engine camshaft dismounting device, wherein the outer end of the first screw rod is provided with a handle, and the outer end of the second screw rod is provided with a hand wheel.

[0011] The large-bore diesel engine camshaft dismounting device has the advantages of simple structure and low cost.

[0012] The advantages and characteristics of the present application will be illustrated and explained by means of the following non-limiting description of preferred embodiments, given by way of example only, with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a schematic diagram of the three-dimensional structure of the present application.

[0014] Figure 2 is a schematic diagram of the three-dimensional structure of the diesel engine camshaft supported on the present application. DETAILED DESCRIPTION

[0015] The present application will be further described below with reference to the accompanying drawings and embodiments.

[0016] As Figure 1As shown, the utility model includes base 1, support frame 2 and upper skeleton 3. The outer end middle part of base 1 is equipped with first screw rod and nut combination 4 longitudinally, and the two ends of first screw rod 41 are supported on the two horizontal plates of the outer end of base 1 respectively, and the outer end tip of first screw rod 41 is equipped with handle 42, and the bottom outer end of base 1 is equipped with bayonet 43, and the outer end two sides are equipped with connecting lug plate 44 respectively, which is convenient for connecting with rack. Support frame 2 is arranged between base 1 and upper skeleton 3, and upper skeleton 3 is supported on support frame 2. Camshaft push mechanism 5 is arranged on upper skeleton 3, and camshaft push mechanism 5 includes second screw rod and nut combination 51, a pair of slide rails 52 and a pair of sliding blocks 53, and second screw rod and nut combination 51 is longitudinally arranged on the lower part of one side of upper skeleton 3, and the two ends of second screw rod 511 are supported on the two end beams of upper skeleton 3 respectively, and the outer end tip of second screw rod 511 is equipped with hand wheel 512, a pair of slide rails 52 are fixed on the two side longitudinal beams of upper skeleton 3 longitudinally respectively, a pair of sliding blocks 53 are slidably supported on a pair of slide rails 52 respectively, and the bottom of a sliding block 53 is welded to the top of second nut 513. The surface of sliding block 53 is concave arc surface, the curvature radius of concave arc surface matches the radius of camshaft journal, and the stability of camshaft support is ensured.

[0017] Support frame 2 includes upper push rod 21, lower push rod 22 and two pairs of support rods 23. Upper push rod 21 is transversely arranged at the inner end of upper skeleton 3, and the two ends of upper push rod 21 are slidably supported in upper slide groove 31 on the two side longitudinal beams of upper skeleton 3 respectively. Lower push rod 22 is transversely arranged at the outer end of base 1, and the two ends of lower push rod 21 are slidably supported in lower slide groove 11 on the two side longitudinal plates of base 1 respectively, and the middle part of lower push rod 22 is welded to the outer circle of first nut 45. Two pairs of support rods 23 are located at the two ends of upper push rod 21 and lower push rod 22 respectively, and each pair of support rods 23 is cross-hinged, and the upper and lower ends of one support rod 23 are hinged with one end of upper push rod 21 and one end of lower push rod 22 respectively, and the upper and lower ends of the other support rod 23 are hinged with the outer end of upper skeleton 3 and the inner end of base 1 respectively.

[0018] As Figure 2As shown, when installing the camshaft 6 of the large-bore diesel engine, the utility model is placed in the rack window, with its inner end deeply going into the rack window, and the aperture 43 at the outer end of the base 1 is clamped on the wall of the rack door, and the base 1 is fixed with the rack through the bolt and the connecting lug plate 44. Then the camshaft 6 is hoisted to the sliding block 53, with its both ends of the journal supported on a pair of sliding blocks 53. The handle 42 is rotated, the first nut 45 drives the lower push rod 22 to move inward, and under the linkage of the lower push rod 22, the upper push rod 21 and the two pairs of supporting rods 23, the upper frame 3 is lifted to a certain position, then the hand wheel 512 is rotated, the second nut 513 and the pair of sliding blocks 53 drive the camshaft 6 to move along the slide rail to the rack window, to the position, the horizontal position and the vertical position of the camshaft 6 are adjusted through the hand wheel 512 and the handle 42 respectively, so that the camshaft 6 is accurately located at the installation position, and the camshaft 6 is manually rotated to make the flanges at both ends of the camshaft 6 respectively aligned with the bearing disc flanges at both ends in the rack window, then the two are fixed through the screws respectively. At this time, the handle 42 is reversely rotated, the upper frame 3 is lowered, the sliding block 53 is separated from the camshaft 6, the hand wheel 512 is reversely rotated to withdraw the sliding block 53, the device is removed, and the installation of the single camshaft 6 is completed. The dismounting method is opposite to the installation sequence.

[0019] In addition to the above embodiments, the utility model can also have other implementation manners, and any technical solution formed by equivalent replacement or equivalent transformation falls within the protection scope required by the utility model.

Claims

1. A large-bore diesel engine camshaft dismounting device, characterized by: The utility model provides a kind of multi-functional automatic mechanical arm, including base, support frame and upper skeleton;The middle part of the outer end of the base is provided with first screw rod and nut combination longitudinally, and the two ends of first screw rod are supported on the two horizontal plates of the outer end of base respectively;Support frame is arranged between base and upper skeleton, and upper skeleton is supported on support frame, and camshaft push mechanism is provided on upper skeleton, and camshaft push mechanism includes second screw rod and nut combination, a pair of slide rails and a pair of sliders, and second screw rod and nut combination is arranged in the lower part of one side of upper skeleton longitudinally, and the two ends of second screw rod are supported on the two end beams of upper skeleton respectively, a pair of slide rails are fixed on the two side longitudinal beams of upper skeleton respectively, and a pair of sliders are slidably supported on a pair of slide rails respectively, and the bottom of one slider is fixedly connected with the top of second nut.

2. The large-bore diesel engine camshaft dismounting device according to claim 1, characterized in that: The support frame includes upper push rod, lower push rod and two pairs of support rods, the upper push rod is transversely arranged at the inner end of upper skeleton, and the two ends of upper push rod are slidably supported in the upper slide grooves on the two side longitudinal beams of upper skeleton, the lower push rod is transversely arranged at the outer end of base, and the two ends of lower push rod are slidably supported in the lower slide grooves on the two side longitudinal plates of base, and the middle part of lower push rod is fixedly connected with the outer circle of first nut, and the two pairs of support rods are respectively arranged at the two ends of upper push rod and lower push rod, each pair of support rods is crossly hinged, the upper and lower ends of one support rod are hingedly connected with one end of upper push rod and one end of lower push rod respectively, and the upper and lower ends of the other support rod are hingedly connected with the outer end of upper skeleton and the inner end of base respectively.

3. The large-bore diesel engine camshaft dismounting device according to claim 1, characterized in that: The outer end of the bottom of base is provided with a bayonet, and the outer end of base is provided with a connecting lug plate on both sides respectively.

4. The large-bore diesel engine camshaft dismounting device according to claim 1, characterized in that: The surface of slider is concave arc surface, and the curvature radius of concave arc surface matches the radius of neck of camshaft.

5. The large-bore diesel engine camshaft removal and installation device of claim 1, wherein: The outer end of first screw rod is provided with a handle, and the outer end of second screw rod is provided with a hand wheel.

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