Crankshaft lifting appliance

Abstract

The utility model relates to a crankshaft lifting appliance which comprises a core rod and two clamping plate assemblies, the core rod is matched with a crankshaft center hole in shape, two lifting lugs are symmetrically arranged on the outer side of the first end of the core rod, and an annular clamping ring is arranged on the peripheral face of the second end, used for being inserted into a crank throw inner opening position from the crankshaft end center hole, of the core rod. The clamping ring is an annular protrusion and / or an annular groove. The edges of the two clamping plate assemblies are each provided with a semicircular notch, and hoop parts matched with the clamping rings in a concave-convex mode are arranged on the circumferential faces of the notches. The two clamping plate assemblies can be connected into a flat plate matched with the shape of an inner opening of the crank throw through bolts, and notches in the connecting position of the two clamping plate assemblies are combined to form a round hole capable of being hooped to the outer circumferential face of the second end of the core rod. The crankshaft hoisting tool has the advantages of simple structure, convenience in assembly with the crankshaft, high hoisting efficiency, good safety, stability in hoisting and no damage to the crankshaft.

Description

Technical Field

[0001] The utility model relates to an auxiliary workpiece for crankshaft machining, in particular to a crankshaft hanger. Background Art

[0002] During the manufacturing process, the crankshaft needs to be hoisted and transferred many times. For large crankshafts, due to their large size and heavy weight, the requirements for hoisting equipment are extremely high. For example, the net weight of the crankshaft model 6G70ME-C reaches 153230kg, the center hole size is 150mm, and the inner opening size of the crank is 248mm.

[0003] The utility model patent with application number 201520981875.4 discloses a crankshaft hoisting tool, including a mandrel, a hanging sleeve shorter than the mandrel and sleeved on the mandrel, and the hanging sleeve is fixed to the middle position of the mandrel by a positioning piece. The mandrel is inserted into the center hole of the crankshaft, and the hanging sleeve is installed on the mandrel from the inner opening of the crank, thereby realizing the crankshaft hoisting. However, this structure either uses two hoisting tools to hoist horizontally at the cranks at both ends of the crankshaft, or uses one hoisting tool to hoist obliquely at the crank at one end of the crankshaft, and it is impossible to realize the vertical hoisting of the crankshaft.

[0004] The invention patent with application number CN201911197631.6 discloses another type of sling, the main body of which is a hanging plate made of a U-shaped metal plate, each of the two ends of the opening of the hanging plate is hinged with a baffle, and the two baffles are detachably connected to the other end hinged to the hanging plate; the inner side of the hanging plate is also formed with a semi-cylindrical hoop portion at the bottom of the groove facing the opening, which is used to conflict with the crankshaft main journal during operation. Two lifting ears are symmetrically arranged on the outside of the hanging plate. This structure can also only realize the inclined lifting of the crankshaft, and due to the large mass of the crankshaft and the high surface accuracy requirements, the sling may cause damage to the crankshaft.

[0005] Therefore be necessary to improve the prior art. Utility Model Content

[0006] The purpose of the embodiment of the utility model is to address the shortcomings of the prior art structure and to propose a crankshaft hoist, which fixes the mandrel at the center hole of the crankshaft through the cooperation of the mandrel and the clamping plate assembly, so as to realize vertical hoisting of the crankshaft, and has the advantages of simple structure, convenient assembly with the crankshaft, high hoisting efficiency, good safety, stable lifting, and no damage to the crankshaft.

[0007] In order to achieve the above-mentioned utility model object, a crankshaft hanger proposed in the embodiment of the utility model is realized by the following technical scheme:

[0008] A crankshaft hanger, characterized in that the crankshaft hanger comprises:

[0009] A mandrel adapted to the shape of the crankshaft center hole, with two lifting ears symmetrically arranged on the outer side of the first end thereof, which is used to be inserted from the center hole of the crankshaft end into the inner opening of the crank, and an annular snap ring is arranged on the outer peripheral surface of the second end thereof; the snap ring is an annular protrusion and / or groove;

[0010] Two clamping plate assemblies, each with a semicircular notch on its edge, and a clamping hoop portion that matches the convex-concave of the clamping ring is provided on the circumferential surface of the notch; the two clamping plate assemblies can be connected by bolts to form a flat plate that is adapted to the inner opening shape of the crank, and the notch combination at the junction of the two constitutes a circular hole that can be clamped on the outer circumferential surface of the second end of the core rod so that the clamping hoop portion and the convex-concave of the clamping ring match.

[0011] The first end of the core rod is provided with a cylindrical head, and the ears are formed on both sides of the head; when the core rod is inserted from the center hole of the crankshaft end until the lower bottom surface of the head abuts against the crankshaft end surface, the retaining ring is located in the middle of the inner opening of the crank.

[0012] The core rod and the center hole of the crankshaft are clearance-matched.

[0013] The clamping ring is an annular groove.

[0014] The clamping ring is an annular protrusion.

[0015] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model proposes a crankshaft hoist, which fixes the core rod at the center hole of the crankshaft through the cooperation of the core rod and the clamping plate assembly, so as to realize vertical hoisting of the crankshaft, and has the advantages of simple structure, convenient assembly with the crankshaft, high hoisting efficiency, good safety, stable lifting, and no damage to the crankshaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The above features and advantages of the present invention will become clearer and easier to understand through the following description of exemplary embodiments thereof in conjunction with the accompanying drawings.

[0017] Figure 1 This is a front view of a crankshaft hanger according to an embodiment of the utility model;

[0018] Figure 2 for Figure 1 AA section view. DETAILED DESCRIPTION

[0019] The following is a specific embodiment of the present invention. People familiar with the technology can easily understand the other advantages and functions of the present invention from the contents disclosed in this specification. Obviously, the described embodiment is a part of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] The terms such as "front", "rear", "left", "right", "inside", "outside" etc. cited in this specification are only for the convenience of description and are not intended to limit the scope of application of the present invention. Changes or adjustments to their relative relationships shall be regarded as within the scope of application of the present invention without substantially changing the technical content.

[0021] In the description of the following embodiments, unless otherwise clearly specified and limited, the terms such as "connection" should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, or an indirect connection through an intermediate medium, or it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0022] See Figure 1-2 As shown, the embodiment of the utility model provides a crankshaft hanger, comprising:

[0023] Mandrel 1

[0024] The main body of the mandrel 1 is a cylinder, which is adapted to the shape of the center hole of the crankshaft and can be inserted into the center hole of the crankshaft and fit with clearance. Two lifting ears 11 are symmetrically arranged on the outer side of the first end, and the second end is used to be inserted from the center hole of the end of the crankshaft 3 to the inner opening of the crank, and an annular retaining ring 12 is arranged on the outer peripheral surface of the second end located at the inner opening of the crank. In a preferred embodiment, a cylindrical head 13 is arranged at the first end of the mandrel 1, and the lifting ears 11 are formed on both sides of the head 13. When the mandrel 1 is inserted from the center hole of the end of the crankshaft 3 until the bottom surface of the head 13 abuts against the end surface of the crankshaft 3, the retaining ring 12 is located in the middle of the inner opening of the crank.

[0025] Two clamping plate components 2

[0026] The two clamping plate assemblies 2 have the same shape, and each of the two edges is provided with a semicircular notch 21, and the circumferential surface of the notch is provided with a hoop portion that matches the convex and concave of the clamp ring 12. The two clamping plate assemblies 2 can be connected by bolts 4 to form a flat plate that matches the shape of the inner opening of the crank, and the notches 21 at the junction of the two are combined to form a circular hole that can be hooped on the outer circumferential surface of the second end of the mandrel 1, and the hoop portion and the clamp ring 12 match concave and convex.

[0027] The purpose of the clamping ring and the hoop part is to restrict the displacement of the core rod 1 in the length direction of the crankshaft center hole. Therefore, any clamping ring 12 structure that can achieve this function can be used here, for example, the clamping ring 12 is an annular protrusion, an annular groove, or a combination of a groove and a protrusion.

[0028] When in use, first insert the core rod 1 into the center hole, and then insert the two clamping plate assemblies into the inner opening of the crank after they are in place, and clamp them on the core rod 1, and then connect the two clamping plate assemblies by bolts to complete the installation of the sling.

[0029] Compared with the prior art, the beneficial effects of the utility model are as follows: the utility model proposes a crankshaft hoist, which fixes the core rod at the center hole of the crankshaft through the cooperation of the core rod and the clamping plate assembly, so as to realize vertical hoisting of the crankshaft, and has the advantages of simple structure, convenient assembly with the crankshaft, high hoisting efficiency, good safety, stable lifting, and no damage to the crankshaft.

[0030] The utility model intention and implementation methods of the utility model are described in detail through the embodiments above. However, a person skilled in the art in the field to which the utility model belongs can understand that the above embodiment of the utility model is only one of the preferred embodiments of the utility model. Due to space limitations, not all implementation methods can be listed here one by one. Any implementation that can embody the technical solution of the claims of the utility model is within the protection scope of the utility model.

[0031] It should be noted that the above content is a further detailed description of the present invention in combination with specific implementation methods, and it cannot be determined that the specific implementation methods of the present invention are limited to these. Under the guidance of the above embodiments, technical personnel in this field can make various improvements and deformations on the basis of the above embodiments, and these improvements or deformations fall within the protection scope of the present invention.

Claims

1. A crankshaft hanger, characterized in that: The crankshaft hanger comprises: A mandrel adapted to the shape of the crankshaft center hole, with two lifting ears symmetrically arranged on the outer side of the first end thereof, which is used to be inserted from the center hole of the crankshaft end into the inner opening of the crank, and an annular snap ring is arranged on the outer peripheral surface of the second end thereof; the snap ring is an annular protrusion and / or groove; Two clamping plate assemblies, each with a semicircular notch on its edge, and a clamping hoop portion that matches the convex-concave of the clamping ring is provided on the circumferential surface of the notch; the two clamping plate assemblies can be connected by bolts to form a flat plate that is adapted to the inner opening shape of the crank, and the notch combination at the junction of the two constitutes a circular hole that can be clamped on the outer circumferential surface of the second end of the core rod so that the clamping hoop portion and the convex-concave of the clamping ring match.

2. A crankshaft hanger according to claim 1, characterized in that: The first end of the core rod is provided with a cylindrical head, and the ears are formed on both sides of the head; when the core rod is inserted from the center hole of the crankshaft end until the lower bottom surface of the head abuts against the crankshaft end surface, the retaining ring is located in the middle of the inner opening of the crank.

3. A crankshaft hanger according to claim 1, characterized in that: The core rod and the crankshaft center hole are clearance-matched.

4. A crankshaft hanger according to any one of claims 1 to 3, characterized in that: The clamping ring is an annular groove.

5. A crankshaft hanger according to any one of claims 1 to 3, characterized in that: The clamping ring is an annular protrusion.

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