Nitriding clamp

Abstract

The nitriding clamp comprises a first plate body, a second plate body and a pipe body, and a plurality of first hoisting screws used for being connected with a crankshaft are evenly connected to the first plate body in the circumferential direction; a plurality of second hoisting screws used for being connected with a crankshaft are uniformly connected to the second plate body in the circumferential direction, a plurality of vent holes are uniformly formed in the second plate body in the circumferential direction, and the second hoisting screws and the first hoisting screws are horizontally arranged in a staggered mode; the pipe body is coaxially and fixedly connected with a third plate body, a second plate body and a first plate body in sequence from bottom to top, and a plurality of exhaust holes for horizontally exhausting nitrogen are uniformly formed in the pipe body in the axial direction and the circumferential direction. According to the crankshaft nitriding device disclosed by the utility model, the plurality of second hoisting screws and the plurality of first hoisting screws are horizontally and uniformly staggered respectively, so that nitrogen particles can uniformly pass through the gaps and are uniformly adhered for nitriding, and the crankshaft nitriding effect is improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of nitriding, and in particular relates to a nitriding fixture. Background Art

[0002] Currently, when heat treating crankshafts, multiple crankshafts are often hoisted in multiple layers using a hoisting fixture and placed into a nitriding furnace, allowing simultaneous nitriding of the multiple crankshafts. However, in existing hoisting fixtures, the crankshafts hoisted in the upper and lower layers are positioned horizontally at the same level and are not horizontally spaced apart. This hinders uniform nitrogen particle adhesion and nitriding, resulting in poor nitriding results. Utility Model Content

[0003] In order to overcome the defects of the prior art, the utility model provides a nitriding fixture, which can improve the nitriding effect.

[0004] The purpose of this utility model is achieved through the following technical solutions:

[0005] A nitriding fixture comprising:

[0006] a first plate body, on which a plurality of first hanging screws for connecting to the crankshaft are evenly connected along the circumferential direction;

[0007] A second plate body, wherein a plurality of second hanging screws for connecting the crankshaft are evenly connected to the second plate body along the circumference, a plurality of vent holes are evenly arranged along the circumference, and the plurality of second hanging screws are respectively arranged horizontally staggered with the plurality of first hanging screws;

[0008] The tube body is coaxially fixedly connected with the third plate body, the second plate body and the first plate body in sequence from bottom to top, and the tube body is evenly provided with a plurality of exhaust holes for horizontally discharging nitrogen along the axial direction and the circumferential direction.

[0009] The beneficial effects of adopting the above technical solution are as follows: multiple crankshafts in the upper layer are evenly hoisted on the first plate body, and multiple crankshafts in the lower layer are evenly hoisted on the second plate body. Nitrogen can be evenly discharged to the multiple crankshafts in the upper layer and the multiple crankshafts in the lower layer through the multiple exhaust holes on the pipe body, and the multiple ventilation holes can ensure that the nitrogen in the upper and lower layers passes evenly. At the same time, the multiple second hoisting screws are evenly staggered horizontally with the multiple first hoisting screws, which is conducive to the uniform passage of nitrogen particles through each gap and the uniform attachment of nitriding, thereby ensuring the consistency of crankshaft nitriding, nitriding appearance color and nitriding layer depth, thereby improving the crankshaft nitriding effect.

[0010] In one embodiment, the third plate is evenly and fixedly connected to a plurality of vertical rods along the circumference, and ends of the plurality of vertical rods away from the third plate are fixedly connected to the second plate and the first plate in sequence.

[0011] The beneficial effect of adopting the above technical solution is that the plurality of vertical rods connect the third plate, the second plate and the first plate into one, and provide support for the third plate, the second plate and the first plate.

[0012] In one embodiment, the nitriding fixture includes a suspension rod coaxially fixedly connected to the first plate body and the tube body.

[0013] The beneficial effects of adopting the above technical solution are: the hanger fixedly connects the first plate body and the tube body to stabilize the tube body and the first plate body, and the hanger is convenient for hanging the nitriding fixture.

[0014] In one embodiment, the axial distance between the first hanging screw and the first plate body is equal to the axial distance between the second hanging screw and the second plate body.

[0015] In one embodiment, the number of the first lifting screws is equal to the number of the second lifting screws, and the circumferential distance between a second lifting screw and its two adjacent first lifting screws is equal.

[0016] The beneficial effect of adopting the above technical solution is that the multiple first lifting screw rods and the multiple second lifting screw rods are arranged more evenly in the horizontal direction.

[0017] In one embodiment, the first lifting screw is threadedly connected to the first plate, and the second lifting screw is threadedly connected to the second plate.

[0018] The beneficial effect of adopting the above technical solution is: such an arrangement facilitates adjustment of the vertical positions of the first hoisting screw rod and the second hoisting screw rod, thereby facilitating adjustment of the vertical position of the crankshaft.

[0019] In one embodiment, a plurality of first threaded through holes for threadedly connecting the first hanging screw rods are uniformly arranged along the circumference of the first plate body.

[0020] In one embodiment, a plurality of second threaded through holes for threadedly connecting the second lifting screw rods are evenly arranged along the circumference of the second plate body.

[0021] In one embodiment, a plurality of first limiting holes for radially limiting the lower end of the upper crankshaft are uniformly arranged along the circumferential direction on the second plate.

[0022] The beneficial effects of adopting the above technical solution are: the first limiting hole can radially limit the lower end of the upper crankshaft to prevent the crankshaft from shaking during movement or nitriding, and reduce the shearing effect of the crankshaft on the first lifting screw.

[0023] In one embodiment, a plurality of second limiting holes for radially limiting the lower end of the lower crankshaft are uniformly arranged along the circumferential direction on the third plate.

[0024] The beneficial effects of adopting the above technical solution are: the second limiting hole can radially limit the lower end of the lower crankshaft to prevent the crankshaft from shaking during movement or nitriding, and reduce the shearing effect of the crankshaft on the second lifting screw.

[0025] The beneficial effects of the present invention are:

[0026] The upper multiple crankshafts are evenly hoisted on the first plate body, and the lower multiple crankshafts are evenly hoisted on the second plate body. Nitrogen can be evenly discharged to the upper multiple crankshafts and the lower multiple crankshafts through the multiple exhaust holes on the tube body, and the multiple vent holes can ensure that the nitrogen in the upper and lower layers passes evenly. At the same time, the multiple second hoisting screws are respectively and evenly staggered with the multiple first hoisting screws, which is conducive to the uniform passage of nitrogen particles through each gap and the uniform attachment of nitriding, thereby ensuring the consistency of crankshaft nitriding, nitriding appearance color and nitriding layer depth, thereby improving the crankshaft nitriding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] The present invention will be described in more detail below based on embodiments with reference to the accompanying drawings.

[0028] in:

[0029] Figure 1 Shows a schematic structural diagram of the utility model;

[0030] Figure 2 Shows a schematic structural diagram of the first plate in the present invention;

[0031] Figure 3 Shows a schematic structural diagram of the second plate in the present invention;

[0032] Figure 4 Shows a schematic structural diagram of the tube body in the utility model;

[0033] In the drawings, like reference numerals are used for like parts, but the drawings are not necessarily true to scale.

[0034] Reference numerals:

[0035] 1-first plate, 101-first threaded through hole, 2-tube, 201-exhaust hole, 202-exhaust notch, 3-second plate, 301-second threaded through hole, 302-first limiting hole, 303-vent, 4-third plate, 5-vertical rod, 6-suspender. DETAILED DESCRIPTION

[0036] The present invention will be further described below with reference to the accompanying drawings.

[0037] The utility model provides a nitriding fixture, such as Figure 1-4 As shown, it includes:

[0038] A first plate body 1, on which a plurality of first hanging screws for connecting to the crankshaft are evenly connected along the circumference;

[0039] A second plate 3, on which a plurality of second hanging screws for connecting the crankshaft are evenly connected along the circumference, a plurality of vent holes 303 are evenly arranged along the circumference, and the plurality of second hanging screws are respectively arranged horizontally staggered with the plurality of first hanging screws;

[0040] The tube body 2 is coaxially welded with the third plate body 4, the second plate body 3 and the first plate body 1 in sequence from bottom to top. The tube body 2 is evenly provided with a plurality of exhaust holes 201 for horizontally discharging nitrogen along the axial and circumferential directions; the upper end of the tube body 2 can also be evenly provided with two exhaust notches 202 along the circumferential direction.

[0041] It can be understood that the upper multiple crankshafts are evenly hoisted on the first plate body 1, and the lower multiple crankshafts are evenly hoisted on the second plate body 3. The nitrogen can be evenly discharged to the upper multiple crankshafts and the lower multiple crankshafts through the multiple exhaust holes 201 on the tube body 2, and the multiple air holes 303 can ensure that the nitrogen in the upper and lower layers passes evenly. At the same time, the multiple second hoisting screws are respectively and evenly staggered horizontally with the multiple first hoisting screws, which is conducive to the uniform passage of nitrogen particles through each gap and is conducive to ensuring that each crankshaft position can evenly receive the attachment of nitrogen, thereby ensuring the consistency of crankshaft nitriding, nitriding appearance color and nitriding layer depth, thereby improving the crankshaft nitriding effect.

[0042] It should be noted that the nitriding fixture can meet the requirements of good permeability of the upper and lower layers of gas, and the spacing of the crankshaft vertical installation is uniform and will not interfere with each other; at the same time, the crankshaft vertical installation is stable and will not tilt.

[0043] It should also be noted that this nitriding fixture can be used for export auto parts racing crankshafts, specifically for foreign four-cylinder crankshafts, V6 crankshafts, V8 crankshafts and V10 crankshafts.

[0044] In one embodiment, a plurality of vertical rods 5 are uniformly welded to the third plate 4 along the circumference, and ends of the plurality of vertical rods 5 away from the third plate 4 are welded to the second plate 3 and the first plate 1 in sequence.

[0045] It can be understood that the plurality of vertical rods 5 connect the third plate 4 , the second plate 3 and the first plate 1 into one body, and provide support for the third plate 4 , the second plate 3 and the first plate 1 .

[0046] It should be noted that the first lifting screw rod and the second lifting screw rod are also arranged vertically, while the first plate body 1, the second plate body 3 and the third plate body 4 are all arranged horizontally.

[0047] In one embodiment, the nitriding fixture includes a hanger rod 6 , which coaxially welds the first plate body 1 and the tube body 2 .

[0048] It can be understood that the hanger 6 fixedly connects the first plate body 1 and the tube body 2 to stabilize the tube body 2 and the first plate body 1 and facilitates the use of the hanger 6 to hang the nitriding fixture.

[0049] In one embodiment, the axial distance between the first lifting screw and the first plate body 1 is equal to the axial distance between the second lifting screw and the second plate body 3; the number of first lifting screws is equal to the number of second lifting screws, and the circumferential distance between the second lifting screw and its two adjacent first lifting screws is equal, so that the multiple first lifting screws and the multiple second lifting screws are more evenly distributed in the horizontal direction.

[0050] It should be noted that the adjacent first lifting screw rods and the second lifting screw rods may be offset by 15°.

[0051] In one embodiment, the first lifting screw is threadedly connected to the first plate body 1, and the second lifting screw is threadedly connected to the second plate body 3, so as to facilitate adjustment of the vertical position of the first lifting screw and the second lifting screw, thereby facilitating adjustment of the vertical position of the crankshaft.

[0052] It should be noted that, by arranging the plurality of second lifting screws horizontally staggered with the plurality of first lifting screws, interference between the upper crankshaft and the second lifting screws in the installation space can also be avoided.

[0053] In one embodiment, Figure 2 As shown, a plurality of first threaded through holes 101 for threadedly connecting the first lifting screw rods are uniformly arranged along the circumference of the first plate body 1 .

[0054] In one embodiment, Figure 3 As shown, a plurality of second threaded through holes 301 for threadedly connecting the second lifting screw rods are uniformly arranged along the circumference of the second plate body 3 .

[0055] In one embodiment, Figure 3 As shown, a plurality of first limiting holes 302 for radially limiting the lower end of the upper crankshaft are uniformly arranged along the circumferential direction on the second plate body 3 .

[0056] It can be understood that the first limiting hole 302 can radially limit the lower end of the upper crankshaft to prevent the crankshaft from shaking during movement or nitriding, and reduce the shearing effect of the crankshaft on the first hanging screw.

[0057] In one embodiment, a plurality of second limiting holes for radially limiting the lower end of the lower crankshaft are uniformly arranged along the circumferential direction on the third plate body 4 .

[0058] It can be understood that the second limiting hole can radially limit the lower end of the lower crankshaft to prevent the crankshaft from shaking during movement or nitriding, and reduce the shearing effect of the crankshaft on the second lifting screw.

[0059] In addition, since the nitriding fixture needs to load the crankshaft for nitriding in the nitriding furnace, the nitriding fixture will be subjected to high temperature, high pressure and special gas, and the environment in which the nitriding fixture is located is relatively harsh, the nitriding fixture can be made of Q235 steel.

[0060] In the description of the present invention, it should be understood that the terms "upper", "lower", "bottom", "top", "front", "back", "inside", "outside", "left", "right", etc., indicating directions or positional relationships, are based on the directions 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 direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

[0061] Although the present invention is described herein with reference to specific embodiments, it should be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It should be understood that many modifications may be made to the illustrative embodiments, and that other arrangements may be devised, without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that the various dependent claims and features described herein may be combined in ways other than those described in the original claims. It should also be understood that features described in conjunction with individual embodiments may be employed in conjunction with other described embodiments.

Claims

1. A nitriding fixture, characterized in that: include: A first plate body (1), wherein a plurality of first hanging screw rods for connecting to a crankshaft are evenly connected to the first plate body (1) along the circumferential direction; A second plate body (3), wherein a plurality of second hanging screws for connecting the crankshaft are evenly connected to the second plate body (3) along the circumference, a plurality of vent holes (303) are evenly arranged along the circumference, and the plurality of second hanging screws are respectively arranged horizontally staggered with the plurality of first hanging screws; A tube body (2), wherein the tube body (2) is coaxially fixedly connected to a third plate body (4), the second plate body (3) and the first plate body (1) in sequence from bottom to top, and the tube body (2) is evenly provided with a plurality of exhaust holes (201) for horizontally discharging nitrogen along the axial and circumferential directions.

2. A nitriding fixture according to claim 1, characterized in that: The third plate (4) is evenly and fixedly connected to a plurality of vertical rods (5) along the circumferential direction, and one end of the plurality of vertical rods (5) away from the third plate (4) is fixedly connected to the second plate (3) and the first plate (1) in sequence.

3. The nitriding fixture according to claim 1, characterized in that: It comprises a suspension rod (6), wherein the suspension rod (6) is coaxially fixedly connected to the first plate body (1) and the tube body (2).

4. The nitriding fixture according to claim 1, characterized in that: The axial distance between the first hanging screw and the first plate body (1) is equal to the axial distance between the second hanging screw and the second plate body (3).

5. A nitriding fixture according to claim 4, characterized in that: The number of the first lifting screws is equal to the number of the second lifting screws, and the circumferential distance between the second lifting screws and two adjacent first lifting screws is equal.

6. The nitriding fixture according to claim 1, characterized in that: The first hanging screw is threadedly connected to the first plate body (1), and the second hanging screw is threadedly connected to the second plate body (3).

7. The nitriding fixture according to claim 6, characterized in that: A plurality of first threaded through holes (101) for threadedly connecting the first hanging screw rods are evenly arranged along the circumference of the first plate body (1).

8. The nitriding fixture according to claim 6, characterized in that: A plurality of second threaded through holes (301) for threadedly connecting the second hanging screw rods are evenly arranged along the circumference of the second plate body (3).

9. A nitriding fixture according to claim 1 or 6, characterized in that: A plurality of first limiting holes (302) for radially limiting the lower end of the upper crankshaft are evenly arranged along the circumferential direction on the second plate body (3).

10. A nitriding fixture according to claim 1 or 6, characterized in that: A plurality of second limiting holes for radially limiting the lower end of the crankshaft in the lower layer are evenly arranged on the third plate body (4) along the circumferential direction.

Images