Ionic nitriding protection tool special for connecting rod

Abstract

The utility model relates to a special ion nitriding protection tool for a connecting rod, which comprises a hole plug, a clamping block and a clamping block, wherein the hole plug is inserted into an oil hole of the connecting rod; a first hole cover; the second hole cover is detachably connected with the first hole cover, and the first hole cover and the second hole cover are arranged on the left side and the right side of the through hole of the connecting rod respectively and used for blocking the through hole of the connecting rod; the flange plate at the bottom of the connecting rod is placed in the base; a first bottom cover; the first bottom cover and the second bottom cover are both arranged above the base and arranged on the left side and the right side of the flange plate respectively, the first bottom cover and the second bottom cover are detachably connected, cambered surfaces are formed on the sides, close to the connecting rod, of the first bottom cover and the second bottom cover, and the cambered surfaces are matched with the periphery of the connecting rod. The hole plug, the two hole covers and the two bottom covers are arranged to protect the structure, not needing ionic nitriding, of the connecting rod, after ionic nitriding, the hole plug, the two hole covers and the two bottom covers are separated from the connecting rod, and it is guaranteed that the connecting rod has the high percent of pass after ionic nitriding.

Description

Technical Field

[0001] This disclosure relates to the field of ion nitriding technology, and more specifically, to a special ion nitriding protection tool for connecting rods. Background Technology

[0002] In existing technologies, before ion nitriding a portion of the connecting rod, technicians need to protect the non-nitriding sections with a coating. However, this method requires timely removal of the coating after ion nitriding because cleaning generates friction. Consequently, the surface of the connected rod after cleaning often fails to meet the workpiece's roughness, dimensional, and geometric tolerance requirements, resulting in a low pass rate after ion nitriding. Furthermore, this tooling is reusable, making it more efficient and energy-saving. Utility Model Content

[0003] To overcome the problem of low pass rate after nitriding of existing connecting rods, this utility model provides a special ion nitriding protection tool for connecting rods.

[0004] To achieve the above objectives, this utility model provides a special ion nitriding protection fixture for connecting rods, comprising:

[0005] Hole plug, used to be inserted into the oil hole of the connecting rod;

[0006] First hole cover;

[0007] The second hole cover is detachably connected to the first hole cover. The first hole cover and the second hole cover are respectively located on the left and right sides of the through hole of the connecting rod, and are used to block the through hole of the connecting rod.

[0008] The base, the flange at the bottom of the connecting rod is placed inside the base;

[0009] First bottom cover; and

[0010] The second bottom cover, the first bottom cover and the second bottom cover are both located above the base and on the left and right sides of the flange, respectively. The first bottom cover and the second bottom cover are detachably connected. The side of the first bottom cover and the second bottom cover near the connecting rod is formed with an arc surface, and the arc surface is adapted to the outer periphery of the connecting rod.

[0011] Optionally, both the first and second hole covers include a cover body and a plug body connected to the cover body. The cover body has a circular cross-section, and the diameter of the cover body decreases from the end away from the plug body to the end closer to the plug body. The plug body is used to extend into the through hole of the connecting rod.

[0012] Optionally, the tooling further includes:

[0013] The first bolt has one end connected to the first hole cover and the other end passing through the second hole cover; and

[0014] The first nut is fitted onto the outer circumference of the first bolt and is screwed into the first bolt.

[0015] Optionally, the first hole cover and the second hole cover are engaged.

[0016] Optionally, the tooling further includes:

[0017] The second bolt has one end connected to the first bottom cover and the other end passing through the second bottom cover; and

[0018] The second nut is fitted onto the outer circumference of the second bolt and is screwed into the second bolt.

[0019] Optionally, the second bolt and the second nut are in multiple sets and are installed at intervals on the first bottom cover and the second bottom cover.

[0020] Optionally, the base is a square box.

[0021] The technical solutions provided by the embodiments of this disclosure may include the following beneficial effects:

[0022] Before ion nitriding, the flange at the bottom of the connecting rod is placed inside the base. The first and second bottom covers are placed on the base, with their curved surfaces fitting against the connecting rod. The two bottom covers are connected to ensure that the flange of the connecting rod will not be nitrided. A plug is inserted into the oil hole to prevent the oil hole of the connecting rod from being ion nitrided. The first and second hole covers are then used to block the left and right sides of the through hole, and the two hole covers are connected to prevent the through hole of the connecting rod from being ion nitrided. By using a plug, two hole covers, and two bottom covers, the connecting rod's non-ion nitriding components are protected. After ion nitriding, the plug, two hole covers, and two bottom covers are separated from the connecting rod, avoiding changes in the roughness, dimensions, and form and position tolerances of the connecting rod caused by the coating. This ensures that the connecting rod has a high pass rate after ion nitriding. Attached Figure Description

[0023] Figure 1 This is a front view illustrating the use of a connecting rod-specific ion nitriding protection tool according to an exemplary embodiment of this disclosure.

[0024] Figure 2 This is an exploded view of a schematic diagram illustrating the use of a connecting rod-specific ion nitriding protection tool according to an exemplary embodiment of this disclosure.

[0025] Figure 3 This is a first bottom cover and a second bottom cover of a connecting rod-specific ion nitriding protection tooling, as shown in an exemplary embodiment of this disclosure.

[0026] Explanation of icon numbers

[0027] 1. Connecting rod; 11. Oil hole; 12. Through hole; 13. Flange; 14. Rod part; 100. Hole plug; 210. First hole cover; 211. Cover body; 212. Plug body; 220. Second hole cover; 300. Base; 410. First bottom cover; 411. Arc surface; 420. Second bottom cover; 510. First bolt; 520. First nut; 530. Second bolt; 540. Second nut. Detailed Implementation

[0028] The specific embodiments of this disclosure will be described in detail below with reference to the accompanying drawings. It should be understood that the specific embodiments described herein are for illustration and explanation only and are not intended to limit this disclosure.

[0029] In this disclosure, unless otherwise stated, directional terms such as "upper," "lower," "front," "rear," "left," and "right" are used for ease of description based on the drawing orientations of the corresponding figures, while "inner" and "outer" are defined based on the contours of the corresponding components themselves. Terms such as "first" and "second" used in this disclosure are used to distinguish one element from another and do not have sequential or importance implications. Furthermore, when the following description refers to the figures, unless otherwise indicated, the same numbers in different figures represent the same or similar elements.

[0030] Please see Figures 1 to 3 This disclosure provides a connecting rod-specific ion nitriding protection fixture, including a hole plug 100, a first hole cover 210, a second hole cover 220, a base 300, a first bottom cover 410, and a second bottom cover 420. The hole plug 100 is inserted into the oil hole 11 of the connecting rod 1. The second hole cover 220 is detachably connected to the first hole cover 210, and the first and second hole covers 210 are respectively located on the left and right sides of the through hole 12 of the connecting rod 1, used to block the through hole 12 of the connecting rod 1. The flange 13 at the bottom of the connecting rod 1 is placed inside the base 300. The first and second bottom covers 410 and 420 are both located above the base 300 and on the left and right sides of the flange 13, respectively. The first and second bottom covers 410 and 420 are detachably connected, and both the first and second bottom covers 410 and 420 have an arc surface 411 on the side closest to the connecting rod 1, the arc surface 411 being adapted to the outer periphery of the connecting rod 1.

[0031] Understandably, before ion nitriding, the flange 13 at the bottom of the connecting rod 1 is placed inside the base 300, the first bottom cover 410 and the second bottom cover 420 are placed on the base 300, and the arc surface 411 of the first bottom cover 410 and the second bottom cover 420 are fitted to the connecting rod 1, connecting the two bottom covers to ensure that the flange 13 of the connecting rod 1 will not be nitrided; the hole plug 100 is inserted into the oil hole 11 to ensure that the oil hole 11 of the connecting rod 1 will not be ion nitrided; the first hole cover 210 and the second hole cover 220 are respectively used to block the left and right sides of the through hole 12, and the two hole covers are connected to ensure that the through hole 12 of the connecting rod 1 will not be ion nitrided. By setting the hole plug 100, the two hole covers and the two bottom covers, the structure of the connecting rod 1 that does not need ion nitriding is protected, that is, only the rod part 14 of the connecting rod 1 needs ion nitriding treatment. After ion nitriding, the hole plug 100, two hole caps and two bottom caps are separated from the connecting rod 1, which avoids changes in the roughness, size and form and position tolerances of the connecting rod 1 due to the use of coating, and ensures that the connecting rod 1 has a high pass rate after ion nitriding.

[0032] In this embodiment, please refer to Figure 1 and Figure 2 Both the first cap 210 and the second cap 220 include a cap body 211 and a plug body 212 connected to the cap body 211. The cap body 211 has a circular cross-section, and its diameter decreases from the end furthest from the plug body 212 to the end closest to the plug body 212. The plug body 212 is used to extend into the through hole 12 of the connecting rod 1. The cap body 211 can abut against the through hole 12 of the connecting rod 1, so that the through hole 12 can be in a sealed state. By providing the plug body 212, the two caps can be quickly positioned in the through hole 12, avoiding ion nitriding of the hole wall of the through hole 12 due to inaccurate positioning of the cap body 211. Of course, in other embodiments, the first cap 210 and the second cap 220 may only have a cap body 211.

[0033] In one implementation, please refer to Figure 1 and Figure 2 The tooling also includes a first bolt 510 and a first nut 520. One end of the first bolt 510 is connected to the first hole cover 210, and the other end passes through the second hole cover 220. The first nut 520 is sleeved on the outer periphery of the first bolt 510 and screwed to the first bolt 510, ensuring a detachable connection between the two hole covers.

[0034] In one embodiment, the first hole cover 210 and the second hole cover 220 are engaged.

[0035] In one implementation, please refer to Figures 1 to 3The tooling also includes a second bolt 530 and a second nut 540. One end of the second bolt 530 is connected to the first bottom cover 410, and the other end passes through the second bottom cover 420. The second nut 540 is sleeved on the outer periphery of the second bolt 530 and screwed to the second bolt 530, ensuring a detachable connection between the two bottom covers.

[0036] In one implementation, please refer to Figure 3 The second bolt 530 and the second nut 540 are in multiple sets and are installed at intervals on the first bottom cover 410 and the second bottom cover 420 to ensure a stable connection between the two bottom covers. Specifically, the second bolt 530 and the second nut 540 can be in two, three, or four sets, etc., which will not be detailed here.

[0037] In one implementation, please refer to Figure 1 and Figure 2 The base 300 is a square box and is a welded structural component.

[0038] This invention has been described through embodiments. Those skilled in the art will understand that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of the invention. Furthermore, under the teachings of this invention, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of the invention. Therefore, this invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the protection scope of this invention.

Claims

1. A dedicated ion nitriding protective tooling for connecting rods, characterized in that, The tool comprises: a hole plug (100) for being inserted into an oil hole (11) of a connecting rod (1); a first hole cover (210); a second hole cover (220) detachably connected with the first hole cover (210), the first hole cover (210) and the second hole cover (220) being respectively arranged on left and right sides of a through hole (12) of the connecting rod (1) to plug the through hole (12) of the connecting rod (1); a base (300) in which a flange plate (13) at a bottom of the connecting rod (1) is placed; a first bottom cover (410); and a second bottom cover (420), the first bottom cover (410) and the second bottom cover (420) being both arranged above the base (300) and respectively arranged on left and right sides of the flange plate (13), the first bottom cover (410) being detachably connected with the second bottom cover (420), and each of the first bottom cover (410) and the second bottom cover (420) being formed with an arc surface (411) close to the connecting rod (1), the arc surface (411) being matched with an outer periphery of the connecting rod (1).

2. The dedicated ion nitriding protection tooling for connecting rods according to claim 1, characterized in that, The first hole cover (210) and the second hole cover (220) each comprise a cover body (211) and a plug body (212) connected with the cover body (211), the cover body (211) being circular in cross section, and a diameter of the cover body (211) decreasing from one end away from the plug body (212) to one end close to the plug body (212), the plug body (212) being used to extend into the through hole (12) of the connecting rod (1).

3. The dedicated ion nitriding protection tooling for connecting rods according to claim 1, characterized in that, The tool further comprises: a first bolt (510) having one end connected with the first hole cover (210) and the other end penetrating through the second hole cover (220); and a first nut (520) sleeved on an outer periphery of the first bolt (510) and screwed with the first bolt (510).

4. The connecting rod specific ion nitriding protection tooling of claim 1 wherein, The first hole cover (210) and the second hole cover (220) are detachably connected.

5. The dedicated ion nitriding protective tooling for connecting rods according to claim 1, wherein, The tool further comprises: a second bolt (530) having one end connected with the first bottom cover (410) and the other end penetrating through the second bottom cover (420); and a second nut (540) sleeved on an outer periphery of the second bolt (530) and screwed with the second bolt (530).

6. The connecting rod specific ion nitriding protection tooling of claim 5 wherein, The second bolt (530) and the second nut (540) are in multiple groups and are installed on the first bottom cover (410) and the second bottom cover (420) at intervals.

7. The connecting rod specific ion nitriding protection tooling of claim 1 wherein, The base (300) is a square box.

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