A high-load-bearing crankshaft nitriding support hanger device

Abstract

The present invention provides a high-load crankshaft nitriding support hanger device, comprising a frame, wherein two of the cross arms of the frame facing the upper frame have hanging parts for hanging crankshafts, the upper frames of the two cross arm hanging parts are provided with limiters for limiting the hanging parts, and the frame is provided with a hanging space for hanging crankshafts. In the present invention, the crankshaft main journal clearance is installed in the hanging parts, and the hanging parts cross arms are on the frame. At this time, the crankshaft is freely hung on the frame, so that the crankshaft can be vertically loaded into the furnace for nitriding treatment by its own weight, reducing the deformation of parts due to gravity and external forces in a high temperature and long-term heat preservation environment, and achieving very good social and economic benefits.

Description

Technical Field

[0001] The invention belongs to the field of crankshaft production, and in particular relates to a high-load-bearing crankshaft nitriding support hanger device. Background Art

[0002] The clamping and fixing method for crankshaft nitriding treatment is usually: the crankshaft cone or crankshaft adapter is bolted to the hook and hung in the hanging basket. In addition, due to the influence of the bolt tightening force, the connection between the crankshaft and the tooling is subject to the multiple effects of gravity and bolt tightening force. These two parts of the crankshaft bear the entire dead weight of the parts during the nitriding process. In addition, the unreasonable design of the hanging method causes the crankshaft to be unable to be in a free state during the nitriding process, which ultimately leads to large deformation of the crankshaft cone section and the adapter section during the nitriding process, and serious dimensional deviation of the parts after they are out of the furnace. Summary of the invention

[0003] In view of this, the present invention aims to propose a high-load crankshaft nitriding support and hoisting device, change the existing crankshaft hoisting method, utilize the deformation law of the crankshaft during the nitriding process and the structural preferred shaft diameter of the crankshaft to determine the optimal support position, design a reliable support and hoisting device, reduce the deformation of the crankshaft during the nitriding process, eliminate quality risks, and improve the compliance rate of crankshaft nitriding.

[0004] To achieve the above object, the technical solution of the present invention is achieved as follows:

[0005] A high-load crankshaft nitriding support hanger device comprises a frame, two of the cross arms of the frame facing the upper frame are provided with hanging parts for hanging the crankshaft, the upper frames of the two cross arm hanging parts are provided with limit parts for limiting the hanging parts, and a hanging space for hanging the crankshaft is provided inside the frame.

[0006] Furthermore, the limiting member includes 4 limiting pins;

[0007] Two limit pins are vertically arranged on one of the upper frames and are respectively arranged on both sides of the hanging piece, and a gap is left between each of the limit pins and the hanging piece;

[0008] The other two limit pins are vertically arranged on another upper frame and are respectively arranged on both sides of the hanging piece, and a gap is left between each of the limit pins and the hanging piece.

[0009] Furthermore, the lifting part includes two half-clamping rings arranged opposite to each other, each half-clamping ring is provided with connecting ears at both ends, the two half-clamping rings are enclosed to form a lifting hole corresponding to the crankshaft main journal, the two half-clamping rings are connected by bolts arranged at the connecting ears, and the connecting ears are cross-armed on the two upper frame frames.

[0010] Furthermore, the frame is a circular frame structure, which includes an outer cylinder frame and an inner cylinder frame fixed therein, and the annular space between the outer cylinder frame and the inner cylinder frame is the hoisting space;

[0011] The outer cylinder frame includes two first support rings, and the inner cylinder frame includes two second support rings. The two first support rings and the two second support rings are connected by vertical rods, and the first support ring and the second support ring located at the bottom are connected and fixed by a connecting rod.

[0012] The hanging parts are cross-armed on the first supporting ring and the second supporting ring located above.

[0013] Furthermore, a plurality of the hanging parts are provided and are evenly arranged on the frame in the circumferential direction.

[0014] Furthermore, a circular plate is provided in the outer cylinder frame near its bottom end, and the vertical rod of the inner cylinder frame movably passes through the circular plate.

[0015] Furthermore, the circular plate is evenly provided with a plurality of through holes.

[0016] Compared with the prior art, the high-load crankshaft nitriding support hanger device described in the present invention has the following advantages:

[0017] (1) In the present invention, the crankshaft main journal clearance is installed in the hanging member, and the hanging member is cross-armed on the frame. At this time, the crankshaft is freely hung on the frame, so that the crankshaft can be vertically loaded into the furnace for nitriding treatment by its own weight, thereby reducing the deformation of parts due to gravity and external forces in a high temperature and long-term heat preservation environment, and achieving very good social and economic benefits.

[0018] (2) In the present invention, the setting of the limiting member enables the lifting member to stably lift the crankshaft. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The accompanying drawings constituting a part of the present invention are used to provide a further understanding of the present invention. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation of the present invention. In the accompanying drawings:

[0020] Figure 1 This is a three-dimensional schematic diagram of a high-load crankshaft nitriding support hanger device described in this embodiment;

[0021] Figure 2 This is a position relationship diagram of the limiter and the hoisting member in this embodiment;

[0022] Figure 3 This is a schematic diagram of the structure of the hoisting parts in this embodiment;

[0023] Description of reference numerals:

[0024] 1-outer cylinder frame; 2-inner cylinder frame; 3-lifting piece; 31-semi-clamping ring; 32-connecting ear; 4-crankshaft; 5-limiting pin; 6-first supporting ring; 7-second supporting ring; 8-vertical rod; 9-round plate. DETAILED DESCRIPTION

[0025] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments may be combined with each other.

[0026] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and the like are only used for descriptive purposes, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", and the like may explicitly or implicitly include one or more of the features. In the description of the present invention, unless otherwise specified, "multiple" means two or more.

[0027] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood by specific circumstances.

[0028] The present invention will be described in detail below with reference to the accompanying drawings and in conjunction with embodiments.

[0029] like Figure 1 As shown, a high-load crankshaft nitriding support hanger device includes a frame, two of the cross arms of the frame facing the upper frame are provided with hanging parts 3 for hanging the crankshaft, the upper frames of the two cross arm hanging parts 3 are provided with limit parts for limiting the hanging parts 3, and a hanging space for hanging the crankshaft is provided inside the frame.

[0030] The frame is a circular ring frame structure, which includes an outer cylinder frame 1 and an inner cylinder frame 2 fixed therein, the outer cylinder frame 1 and the inner cylinder frame 2 are of equal height, and the annular space between the outer cylinder frame 1 and the inner cylinder frame 2 is the hoisting space. The outer cylinder frame 1 includes two first support rings 6, and the two first support rings 6 are arranged opposite to each other in the vertical direction, that is, one of the first support rings 6 is located directly above the other first support ring 6. The inner cylinder frame 2 includes two second support rings 7, and the two first support rings 6 and the two second support rings 7 are connected by vertical rods 8 respectively, and the first support ring 6 and the second support ring 7 located below are connected and fixed by connecting rods. The first support ring 6 located above in the outer cylinder frame 1 and the second support ring 7 located above in the inner cylinder frame 2 are the two upper frames of the frame for the cross-arm hoisting member 3, which is a ring frame structure, and the hoisting member 3 is cross-armed on the ring frame.

[0031] like Figure 2 As shown, the limiting member includes four limiting pins 5, of which two limiting pins 5 are vertically arranged and welded to the first support ring 6, and are arranged on both sides of the hanging member 3, and a gap is left between each of them and the hanging member 3. The other two limiting pins 5 are vertically arranged and welded to the second support ring 7, and are arranged on both sides of the hanging member 3, and a gap is left between each of them and the hanging member 3.

[0032] like Figure 3 As shown, the hanging part 3 is a pipe clamp structure, which includes two half clamping rings 31 arranged opposite to each other, each half clamping ring 31 is provided with connecting ears 32 at both ends, the two half clamping rings 31 are enclosed to form a hanging hole corresponding to the crankshaft main journal, the two half clamping rings 31 are connected by bolts (not drawn in the accompanying drawings) arranged at the connecting ears 32, and the connecting ears 32 are cross-armed on the two upper frame frames.

[0033] In this embodiment, there are multiple hoisting parts 3, which are evenly arranged on the frame in the circumferential direction, and multiple hoisting parts 3 independently support and hoist a crankshaft. This arrangement ensures that the frame is in a stable working state when it is placed in a furnace for nitriding of the crankshaft.

[0034] In this embodiment, a circular plate 9 is provided near the bottom end of the outer cylinder frame 1, and the vertical rod 8 of the inner cylinder frame 2 movably passes through the circular plate 9. The circular plate 9 is evenly provided with a plurality of through holes, through which the atmosphere in the furnace can flow, thereby improving the nitriding treatment effect of the crankshaft.

[0035] During the nitriding treatment of the crankshaft, firstly, a main journal near the end of the crankshaft 4 is clamped in the hanging part 3, and when clamping, a gap is left between the two half clamping rings 31 and the main journal, then the hanging part 3 is cross-armed on the frame, the crankshaft 4 is inserted into the hanging space of the frame, and then the frame with the crankshaft hung is placed in the furnace for nitriding treatment. In this device, since there are gaps between the connecting ear 32 and the two limit pins 5 on the first support ring 6, and between the connecting ear 32 and the two limit pins 5 of the second support ring 7, that is, the hanging part 3 has a certain degree of freedom, and there is a gap between the main journal for hanging the crankshaft 4 and the two half clamping rings 31, so that the crankshaft 4 has a certain degree of freedom relative to the hanging part 3. At this time, the crankshaft is freely hung on the frame, and the crankshaft can be vertically hung by its own weight, and then loaded into the furnace for nitriding treatment. During the nitriding process, the support hanger does not apply any additional mechanical force to the crankshaft, ensuring that the crankshaft always remains in a free vertical hanging state on the support hanger. This can effectively prevent the parts from being deformed due to their own gravity, external forces and other factors in a high-temperature and long-term heat-insulating environment, and has achieved very good social and economic benefits.

[0036] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A high-load crankshaft nitriding support hanger device, characterized in that: It comprises a frame, wherein two of the cross arms of the frame facing the upper frame are provided with hanging parts (3) for hanging a crankshaft (4), the upper frames of the two cross arm hanging parts (3) are provided with limit parts for limiting the hanging parts (3), and a hanging space for hanging the crankshaft is provided in the frame; The limiting member comprises four limiting pins (5), wherein two limiting pins (5) are vertically arranged on one of the upper frame frames, and the other two limiting pins (5) are vertically arranged on the other upper frame frame; The hoisting member (3) comprises two half clamping rings (31) arranged opposite to each other, each half clamping ring (31) is provided with a connecting ear (32) at both ends, the two half clamping rings (31) are surrounded to form a hoisting hole corresponding to the crankshaft main journal, and the two half clamping rings (31) are connected by bolts arranged at the connecting ears (32); A main journal near the end of the crankshaft (4) is clamped in the hanging component (3), and a gap is left between the two half clamping rings (31) and the main journal. The hanging component (3) is cross-armed on the two upper frame frames through connecting ears (32). The crankshaft (4) is inserted into the hanging space of the frame, one connecting ear (32) is located between the two limit pins (5) of one upper frame and a gap is left between the two limit pins (5), and the other connecting ear (32) is located between the two limit pins (5) of the other upper frame and a gap is left between the two limit pins (5).

2. A high-load crankshaft nitriding support hanger device according to claim 1, characterized in that: The frame is a circular ring frame structure, comprising an outer cylinder frame (1) and an inner cylinder frame (2) fixedly arranged therein, and the annular space between the outer cylinder frame (1) and the inner cylinder frame (2) is the hoisting space; The outer cylinder frame (1) comprises two first support rings (6), and the inner cylinder frame (2) comprises two second support rings (7); the two first support rings (6) and the two second support rings (7) are connected by vertical rods (8), respectively, and the first support ring (6) and the second support ring (7) located at the bottom are connected and fixed by a connecting rod; The first support ring (6) located at the top of the two first support rings (6) is one of the upper frame, the second support ring (7) located at the top of the two second support rings (7) is the other of the upper frame, and the hanging member (3) is cross-armed on the first support ring (6) and the second support ring (7) located at the top.

3. A high-load crankshaft nitriding support hanger device according to claim 2, characterized in that: A plurality of the hanging parts (3) are provided and are evenly arranged on the frame in the circumferential direction.

4. A high-load crankshaft nitriding support hanger device according to claim 2, characterized in that: A circular plate (9) is provided inside the outer cylinder frame (1) near its bottom end, and the vertical rod (8) of the inner cylinder frame (2) movably passes through the circular plate (9).

5. A high-load crankshaft nitriding support hanger device according to claim 4, characterized in that: The circular plate (9) is evenly provided with a plurality of through holes.

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