Bolt nitriding device

Abstract

The bolt nitriding device comprises a box body and an annular shell, a heating plate is arranged in the box body, a box cover is arranged on the box body, a nitrogen input pipe is arranged in the box body, a plurality of groups of first openings and second openings are formed in the annular shell, and first inclined plates are connected in the first openings in a sliding mode. A control wheel is rotated to drive a first rack and a second rack to slide oppositely, so that the distance between a first inclined plate and a second inclined plate which are connected with the first rack and a second gear can be changed, and therefore the device can be suitable for bolts with different diameters; through matching arrangement of an L-shaped plate and a fixing strip, after a clamping groove in an annular plate is clamped into the L-shaped plate, bolts connected to a first inclined plate and a second inclined plate are driven to move through sliding of the L-shaped plate, and due to the fact that a gap exists between the first inclined plate and the second inclined plate, part of the bolts can be lower than the bottom face between the first inclined plate and the second inclined plate; and thus, collision with the fixing strip can be generated, the fixing strip drives the device to rotate, and the surface nitriding effect of the device can be improved.

Description

Technical Field

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

[0002] Nitriding is a typical method to improve the surface hardness, surface wear resistance and contact fatigue performance of steel parts. It is often used on fasteners such as bolts and screws. This method is especially suitable for rolling contact transmission parts such as bearing parts and gears. After years of research, people have invented technologies such as gas nitriding and ion nitriding, which have been applied to a variety of parts.

[0003] In the prior art, the nitriding device often fixes bolts on the nitriding frame, and then places the tray in the nitriding furnace. During nitriding, the nitriding effect at the fixed connection between the bolts and the nitriding frame is poor, and most of the fixing devices on the nitriding frame can only fix bolts of a single diameter. Therefore, it is necessary to design a bolt nitriding device. Utility Model Content

[0004] Based on this, it is necessary to provide a bolt nitriding device to address the above technical problems.

[0005] In order to achieve the above-mentioned purpose, the utility model provides a bolt nitriding device, including a box body and an annular shell, a heating plate is arranged in the box body, a box cover is arranged on the box body, a nitrogen inlet pipe is arranged in the box body, a plurality of groups of openings 1 and 2 are arranged on the annular shell, a slanted plate 1 is slidably connected in the opening 1, a slanted plate 2 is slidably connected in the opening 2, the slanted plate 1 and the slanted plate 2 are arranged oppositely, a control wheel is rotatably connected in the annular shell, a pinion is installed at the bottom of the control wheel, a large gear is rotatably connected in the annular shell, the large gear is meshed with the pinion, a driving gear is installed at the axis of the large gear, a rack 1 is installed at one end of the slanted plate 1 close to the driving gear, a rack 2 is installed at one end of the slanted plate 2 close to the driving gear, the rack 1 and the rack 2 are located on both sides of the driving gear and are meshed with the driving gear; a plurality of fixing bars are installed at the bottom of the box body, the height of the fixing bars is lower than the height of the bottom surfaces of the slanted plate 1 and the slanted plate 2, slide grooves are arranged on both sides of the box body, an L-shaped plate is slidably and sealably connected in the slide groove, a card slot is arranged on both sides of the annular shell, and the L-shaped plate is matched with the card slot.

[0006] Preferably, a rotary drive device is installed on the box body, a threaded rod is rotatably connected to the box body, the output end of the rotary drive device is transmission-connected to the threaded rod, and a connecting plate is installed at one end of the L-shaped plate outside the box body, and the connecting plate is threadedly connected to the threaded rod.

[0007] Preferably, a plurality of friction strips are installed on the fixing strip.

[0008] Preferably, the annular shell is provided with a plurality of connection ports, and the control wheel is exposed from the connection ports.

[0009] Preferably, the control wheel is provided with a scale.

[0010] Preferably, the rotary drive device is transmission-connected to the threaded rod via a coupling.

[0011] Compared with the prior art, this technical solution has at least one of the following beneficial effects:

[0012] By rotating the control wheel, the control wheel drives the rack 1 and the rack 2 to slide toward each other, so that the distance between the inclined plate 1 and the inclined plate 2 connected with the rack 1 and the gear 2 can be changed, so that it can be suitable for bolts with different diameters;

[0013] Through the matching arrangement of the L-shaped plate and the fixing strip, after the slot on the annular plate is inserted into the L-shaped plate, the sliding of the L-shaped plate drives the bolts supported on the inclined plate 1 and the inclined plate 2 to move. Since there is a gap between the inclined plate 1 and the inclined plate 2, some of the bolts will be lower than the bottom surface between the inclined plate 1 and the inclined plate 2, so that they can collide with the fixing strip, so that the fixing strip drives them to rotate, thereby improving the surface nitriding effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is a partial three-dimensional diagram of the interior of a box body according to an embodiment of the utility model;

[0015] Figure 2 This is a three-dimensional diagram of the interior of a box body according to an embodiment of the present utility model;

[0016] Figure 3 For an embodiment of the utility model Figure 2 Enlarged view of point A in the middle;

[0017] Figure 4 A three-dimensional diagram of an embodiment of the utility model;

[0018] In the figure, 1, box body; 2, annular shell; 3, box cover; 4, nitrogen inlet pipe; 5, opening 1; 6, opening 2; 7, inclined plate 1; 8, inclined plate 2; 9, control wheel; 10, small gear; 11, large gear; 12, driving gear; 13, rack 1; 14, rack 2; 15, fixing strip; 16, slide groove; 17, L-shaped plate; 18, slot; 19, rotary drive device; 20, threaded rod; 21, connecting plate; 22, friction strip; 23, connecting port; 24, coupling. DETAILED DESCRIPTION

[0019] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0020] See also Figures 1 to 4 The embodiment of the present application provides a bolt nitriding device, including a box body 1 and an annular shell 2, a heating plate is arranged in the box body 1, a box cover 3 is arranged on the box body 1, a nitrogen inlet pipe 4 is arranged in the box body 1, and the input end of the nitrogen inlet pipe 4 is connected to a nitrogen source, and a plurality of groups of openings 1 5 and 2 are arranged on the annular shell 2, an inclined plate 1 7 is slidably connected in the opening 1 5, and an inclined plate 2 8 is slidably connected in the opening 2 6, and the inclined plate 1 7 and the inclined plate 2 8 are arranged opposite to each other, a control wheel 9 is rotatably connected in the annular shell 2, a small gear 10 is installed at the bottom of the control wheel 9, and the control wheel 9 is coaxially arranged with the small gear 10, a large gear 11 is rotatably connected in the annular shell 2, and the large gear 11 is meshed with the small gear 10, and a large gear 11 is arranged at the axis center of the large gear 11 A driving gear 12 is installed, a rack 13 is installed at one end of the inclined plate 17 close to the driving gear 12, and a rack 2 14 is installed at one end of the inclined plate 28 close to the driving gear 12. The rack 13 and the rack 2 14 are located on both sides of the driving gear 12 and are meshed with the driving gear 12; a plurality of fixing bars 15 are installed at the bottom of the box body 1, and the height of the fixing bars 15 is slightly lower than the height of the bottom surface of the inclined plate 17 and the inclined plate 28, so that the fixing bars 15 do not rub against the inclined plate 17 and the inclined plate 28, but rub against the bolts in the gap between the two. Slide grooves 16 are provided on both sides of the box body 1, and an L-shaped plate 17 is connected to the slide groove 16 in a sliding seal. Slots 18 are provided on both sides of the annular shell 2, and the L-shaped plate 17 is matched with the slot 18.

[0021] In this embodiment, by rotating the control wheel 9, the small gear 10 at the bottom drives the large gear 11 to rotate, and the large gear 11 drives the driving gear 12 to rotate, and the driving gear 12 drives the racks 13 and 14 on both sides thereof and meshing therewith to move in opposite directions, so that the distance between the inclined plate 17 connected to the gear 13 and the inclined plate 28 connected to the rack 214 can be increased or decreased; the inclined plate 17 and the inclined plate 28 are both triangular in shape, so that the inclined edges of the two can cooperate with each other to carry the bolts without causing them to roll back and forth; in order to facilitate the stable sliding of the inclined plate 17 and the inclined plate 28 on the annular shell 2, each group of openings 15 and 26 is set to two and are arranged opposite to each other on the annular shell 2; by rotating the control wheel 9, the inclined plate 17 The distance between the two inclined plates 8 is adjusted to a suitable position so that the bolts will not fall from the gap between them after being placed and a part of the bolts will pass through the gap and be lower than the bottom surfaces of the inclined plates 1 7 and 2 8, and then they are clamped on the L-shaped plate 17 arranged on the box body 1 through the clamping groove 18 on the annular shell 2, and the box cover 3 is closed, the heating plate starts to heat, and the nitrogen inlet pipe 4 starts to input nitrogen for nitriding. Then, the L-shaped plates 17 on both sides of the box body 1 can be pulled back and forth to drive the annular shell 2 to move back and forth in the slide groove 16, so that part of the bolts below the bottom surfaces of the inclined plates 1 7 and 2 8 can collide with the fixing strip 15, and the friction between the fixing strip 15 and the bolts lifts the bolts upward and causes them to rotate, thereby improving the nitriding effect on the bolt surface.

[0022] In some embodiments, in order to facilitate the automatic reciprocating pulling of the L-shaped plate 17, a rotary drive device 19 is installed on the box body 1, and the rotary drive device 19 can be a servo motor. A threaded rod 20 is rotatably connected to the box body 1, and the output end of the rotary drive device 19 is transmission-connected to the threaded rod 20. A connecting plate 21 is installed at one end of the L-shaped plate 17 located outside the box body 1, and the connecting plate 21 is threadedly connected to the threaded rod 20. The rotary drive device 19 drives the threaded rod 20 to rotate, so that the connecting plate 21 drives the L-shaped plates 17 on both sides of the box body 1 to move in the same direction, thereby achieving the purpose of driving the annular shell 2 to move.

[0023] In some embodiments, in order to protect the bolts, a plurality of friction strips 22 are installed on the fixing strip 15. The friction strips 22 are hard high temperature resistant cloth strips or other softer high temperature resistant materials.

[0024] In some embodiments, in order to facilitate the rotation of the control wheel 9 , a plurality of connection ports 23 are provided on the annular shell 2 , and the control wheel 9 is exposed from the connection ports 23 .

[0025] In some embodiments, in order to more accurately adjust the distance between the inclined plate 1 7 and the inclined plate 2 8 through the control wheel 9 , a scale is provided on the control wheel 9 .

[0026] In some embodiments, in order to facilitate the rotary drive device 6 to drive the threaded rod 20 to rotate, the rotary drive device 19 is provided to be transmission-connected to the threaded rod 20 via a coupling 24 .

[0027] The technical features of the above embodiments may be arbitrarily combined. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0028] The above embodiments only express several implementation methods of the utility model, and the descriptions are relatively specific and detailed, but they cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

[0029] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0030] In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like 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 an indirect connection through an intermediate medium, 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 the present invention can be understood according to specific circumstances.

Claims

1. A bolt nitriding device, comprising a box body (1) and an annular shell (2), wherein a heating plate is arranged in the box body (1), a box cover (3) is arranged on the box body (1), and a nitrogen inlet pipe (4) is arranged in the box body (1), characterized in that: The annular shell (2) is provided with a plurality of groups of openings 1 (5) and openings 2 (6). An inclined plate 1 (7) is slidably connected to the opening 1 (5), and an inclined plate 2 (8) is slidably connected to the opening 2 (6). The inclined plates 1 (7) and slanted plates 2 (8) are arranged opposite to each other. A control wheel (9) is rotatably connected to the annular shell (2). A small gear (10) is installed at the bottom of the control wheel (9). A large gear (11) is rotatably connected to the annular shell (2). The large gear (11) is meshed with the small gear (10). A driving gear (12) is installed at the axis of the large gear (11). An end of the inclined plate 1 (7) close to the driving gear (12) is installed. Rack 1 (13), rack 2 (14) is installed at one end of inclined plate 2 (8) close to the driving gear (12), rack 1 (13) and rack 2 (14) are located on both sides of the driving gear (12) and are meshed with the driving gear (12); a plurality of fixing bars (15) are installed at the bottom of the housing (1), the height of the fixing bars (15) is lower than the height of the bottom surface of inclined plate 1 (7) and inclined plate 2 (8); both sides of the housing (1) are provided with slide grooves (16), and L-shaped plates (17) are slidably sealed and connected in the slide grooves (16); both sides of the annular shell (2) are provided with clamping grooves (18), and the L-shaped plates (17) and the clamping grooves (18) are arranged in coordination.

2. The bolt nitriding device according to claim 1, characterized in that: The box body (1) is provided with a rotation drive device (19), the box body (1) is rotationally connected with a threaded rod (20), the output end of the rotation drive device (19) is drivingly connected to the threaded rod (20), and a connecting plate (21) is installed at one end of the L-shaped plate (17) located outside the box body (1), and the connecting plate (21) is threadedly connected to the threaded rod (20).

3. The bolt nitriding device according to claim 1, characterized in that: A plurality of friction strips (22) are mounted on the fixing strip (15).

4. The bolt nitriding device according to claim 1, characterized in that: The annular shell (2) is provided with a plurality of connection openings (23), and the control wheel (9) is exposed from the connection openings (23).

5. The bolt nitriding device according to claim 1, characterized in that: The control wheel (9) is provided with a scale.

6. The bolt nitriding device according to claim 2, characterized in that: The rotary drive device (19) is transmission-connected to the threaded rod (20) via a coupling (24).

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