Connecting rod fixing device

Abstract

The utility model relates to a connecting rod fixing device which is used for fixing a small end of a connecting rod, the small end is provided with a long edge section and a short edge section, and the connecting rod fixing device comprises a main frame, a fixing assembly and an auxiliary supporting assembly, the fixing assembly comprises a first supporting seat, the upper end face of the first supporting seat abuts against the end face of the long edge section, and a distance is formed between the upper end face of the first supporting seat and the end face of the short edge section. The auxiliary supporting assembly comprises a supporting part and a limiting part, the supporting part is located at the interval and abuts against the end face of the short edge section, the limiting part can limit movement of the supporting part, and the small end of the connecting rod is prevented from deforming in the machining process.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of engine component assembly, in particular to a connecting rod fixing device. BACKGROUND

[0002] The connecting rod is a force-bearing moving part connected with the piston of an engine and should have sufficient strength under the reciprocating action in the cylinder, so the bushing embedded in the small-end bore of the connecting rod needs to be durable and reliable.

[0003] In the prior art, the assembly of the bushing and the connecting rod is usually realized by press fitting, and the main process is as follows: the connecting rod is fixed on the main body of the equipment by using a connecting rod fixing device, the bushing is fixed by using a clamp, and the clamp and the bushing are driven to move downward synchronously to press fit the bushing into the small-end bore of the connecting rod.

[0004] However, since the small end of the connecting rod usually has an irregular shape, the small end of the connecting rod is prone to deformation under the action of pressure during the process of pressing the bushing into the small end (i.e. the small-end bore), which affects the processing effect. SUMMARY

[0005] The technical problem to be solved by the utility model is to overcome the defects in the prior art and provide a connecting rod fixing device.

[0006] To achieve the above-mentioned purpose, the utility model adopts the following technical scheme:

[0007] A connecting rod fixing device for fixing the small end of a connecting rod, the small end having a long edge segment and a short edge segment, comprising a main frame, a fixing assembly and an auxiliary support assembly installed on the main frame; the fixing assembly comprises a first support seat, the upper end surface of the first support seat abuts against the end surface of the long edge segment, and a space is formed between the end surface of the long edge segment and the end surface of the short edge segment; the auxiliary support assembly comprises a support part and a limiting part, the support part is located at the space and abuts against the end surface of the short edge segment, and the limiting part can limit the movement of the support part.

[0008] Preferably, it further comprises a mounting block, one side end surface of the mounting block abuts against the end surface of the first support seat, and the other side end surface is recessed downward to form a groove; the support part comprises a support column and a first elastic member; the support column is movably installed in the groove, one end of the first elastic member is connected with the bottom wall of the groove, and the other end is connected with the support column to drive the support column to abut against the end surface of the short edge segment.

[0009] Preferably, a through groove is further arranged on the mounting block and communicated with the recess; the limiting part comprises a limiting rod, a second elastic member and an eccentric wheel linkage mechanism; the limiting rod is at least partially installed in the through groove; the second elastic member drives one end of the limiting rod to abut against an arc surface of the eccentric wheel linkage mechanism; when the eccentric wheel linkage mechanism is at a dead point position, the other end of the limiting rod away from the eccentric wheel linkage mechanism abuts against the outer wall surface of the supporting column.

[0010] Preferably, a notch is arranged on the supporting column, and a first inclined surface is formed at the notch; one end of the limiting rod close to the notch has a second inclined surface matched with the first inclined surface.

[0011] Preferably, a guide structure is further arranged, which comprises a guide groove and a guide column; one of the guide groove and the guide column is arranged on the mounting block, and the other is arranged on the limiting rod.

[0012] Preferably, the central axis of the recess is perpendicular to the central axis of the through groove.

[0013] Preferably, the eccentric wheel linkage mechanism comprises a mounting seat, an eccentric wheel, a pin shaft and a cylinder; the mounting seat is fixedly arranged on the main frame; the eccentric wheel is rotatably arranged on the mounting seat, and a hinged position is arranged on the eccentric wheel; one end of the pin shaft is connected with the hinged position on the eccentric wheel, and the other end is rotatably connected with the telescopic end of the cylinder; the cylinder is rotatably arranged on the main frame.

[0014] Preferably, the main frame comprises a bottom plate and a limiting block; the limiting block is fixedly arranged on the bottom plate, and a first limiting surface limiting the radial movement of the first supporting seat and a second limiting surface limiting the axial movement of the first supporting seat are formed on the limiting block.

[0015] Preferably, the fixing assembly further comprises a second supporting seat; the second supporting seat is arranged opposite to the first supporting seat to clamp the long edge segment; the main frame further comprises a frame, and the second supporting seat is arranged on the frame.

[0016] Preferably, side supporting blocks symmetrically arranged on both sides of the auxiliary supporting assembly are further arranged, and the side supporting blocks abut against the side wall surface of the small head.

[0017] Compared with the prior art, the utility model has the beneficial effects that:

[0018] The connecting rod fixing device provided by this utility model abuts the upper end face of the first support base against the end face of the long side segment. Simultaneously, an auxiliary support assembly is provided, with its support portion located at the gap and abutting against the end face of the short side segment. This improves the fixing effect of the connecting rod fixing device on the small end of the connecting rod, resulting in more even force distribution and preventing deformation during bushing installation. Furthermore, the limiting portion restricts the movement of the support portion, further enhancing the abutment effect between the support portion and the end face of the short side segment, thus preventing deformation of the small end of the connecting rod. Attached Figure Description

[0019] To more clearly illustrate the specific embodiments of this utility model or the technical solutions in the prior art, the drawings used in the description of the specific embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained from these drawings without creative effort.

[0020] Figure 1 A schematic diagram of one example of the present invention.

[0021] Figure 2 for Figure 1 A cross-sectional diagram.

[0022] Figure 3 for Figure 2 An enlarged view of position D1 in the middle.

[0023] Figure 4 for Figure 1 A schematic diagram of the auxiliary support component.

[0024] Figure 5 for Figure 2 An enlarged view of position D2 in the middle.

[0025] Figure 6 for Figure 2 A schematic diagram of the middle limit block.

[0026] Explanation of reference numerals in the attached figures:

[0027] 100. Long side segment; 200. Short side segment; 1. Main frame; 11. Base plate; 12. Limiting block; 121. First limiting surface; 122. Second limiting surface; 13. Frame; 2. Fixing component; 21. First support seat; 22. Second support seat; 3. Auxiliary support component; 31. Support part; 311. Support column; 312. First elastic element; 32. Limiting part; 321. Limiting rod; 322. Second elastic element; 323. Eccentric wheel linkage mechanism; 3231. Mounting seat; 3232. Eccentric wheel; 3233. Pin; 3234. Cylinder; 4. Spacing; 5. Mounting block; 51. Groove; 52. Through groove; 6. Notch; 61. First inclined surface; 7. Second inclined surface; 8. Guide structure; 81. Guide groove; 82. Guide column; 9. Side support block. Detailed Implementation

[0028] The technical solution of this utility model will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0029] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0030] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0031] See Figures 1 to 6 This utility model embodiment provides a connecting rod fixing device for fixing the small end of a connecting rod, wherein the small end of the connecting rod has a long side segment 100 and a short side segment 200.

[0032] Specifically, the connecting rod fixing device provided by the embodiment comprises a main frame 1, a fixing assembly 2 and an auxiliary support assembly 3 which are installed on the main frame 1; wherein the fixing assembly 2 comprises a first support seat 21, the upper end surface of the first support seat 21 is in abutment with the end surface of the long edge segment 100, and a spacing 4 is formed between the end surface of the long edge segment 100 and the end surface of the short edge segment 200; the auxiliary support assembly 3 comprises a support part 31 and a limiting part 32, the support part 31 is located at the spacing 4 and is in abutment with the end surface of the short edge segment 200, and the limiting part 32 can limit the movement of the support part 31.

[0033] It can be understood that, since the small head of the connecting rod is of irregular shape (for example, the small head of the connecting rod has the long edge segment 100 and the short edge segment 200 in the embodiment), the small head of the connecting rod is prone to deformation under the pressure during the process of pressing the bushing into the small head (i.e. the small head hole) of the connecting rod, thereby affecting the processing effect. In the embodiment, the upper end surface of the first support seat 21 can be in abutment with the end surface of the long edge segment 100, and the auxiliary support assembly 3 is further provided, the support part 31 of the auxiliary support assembly 3 is located at the spacing 4 and is in abutment with the end surface of the short edge segment 200, thereby making the force on the small head of the connecting rod more uniform and avoiding deformation of the small head of the connecting rod. In addition, the limiting part 32 can limit the movement of the support part 31, further increasing the abutting effect of the support part 31 and the end surface of the short edge segment 200, and avoiding deformation of the small head of the connecting rod.

[0034] Referring to Figures 1 to 6 In the embodiment, the mounting block 5 is further provided, one side end surface of the mounting block 5 is in abutment with the end surface of the first support seat 21, and the other side end surface is recessed downward to form a groove 51; the support part 31 comprises a support column 311 and a first elastic member 312; the support column 311 is movably installed in the groove 51, one end of the first elastic member 312 is connected with the bottom wall of the groove 51, and the other end is connected with the support column 311 to drive the support column 311 to be in abutment with the end surface of the short edge segment 200. Specifically, the upper end of the mounting block 5 forms an inclined surface, the inclined surface is locally in abutment with the short edge segment 200, the opening of the groove 51 is provided on the inclined surface, and the groove 51 extends downward from the inclined surface.

[0035] It can be understood that the groove 51 can realize the circumferential limiting of the support column 311, avoiding the circumferential deviation of the support column 311, and the first elastic member 312 and the support column 311 cooperate with each other to adapt to different lengths of the short edge segment 200, so that the support column 311 can always be in abutment with the end surface of the short edge segment 200.

[0036] Further, in order to facilitate the adjustment of the limiting rod 321, in the embodiment, the mounting block 5 is further provided with a through groove 52 which is in communication with the groove 51; the limiting part 32 comprises the limiting rod 321, the second elastic member 322 and the eccentric wheel connecting rod mechanism 323; the limiting rod 321 is partially installed in the through groove 52; the second elastic member 322 drives one end of the limiting rod 321 to abut against the arc surface of the eccentric wheel connecting rod mechanism 323; when the eccentric wheel connecting rod mechanism 323 is at the dead point position, the other end of the limiting rod 321 which is away from the eccentric wheel connecting rod mechanism 323 abuts against the outer wall surface of the supporting column 311.

[0037] Further, the central axis of the groove 51 is perpendicular to the central axis of the through groove 52.

[0038] Still further, the eccentric wheel connecting rod mechanism 323 comprises a mounting seat 3231, an eccentric wheel 3232, a pin shaft 3233 and a pneumatic cylinder 3234; the mounting seat 3231 is fixedly arranged on the main frame 1; the eccentric wheel 3232 is rotatably arranged on the mounting seat 3231, and the eccentric wheel 3232 is provided with a hinged position (see the J position marked in Figure 2 and Figure 4 ); one end of the pin shaft 3233 is connected with the hinged position on the eccentric wheel 3232, and the other end is rotatably connected with the telescopic end of the pneumatic cylinder 3234; the pneumatic cylinder 3234 is rotatably arranged on the main frame 1.

[0039] It is not difficult to understand that the "dead point position" is the position when the line connecting the center of the eccentric wheel 3232 and the hinged position is collinear with the pin shaft 3233, that is, the position shown in Figure 2 .

[0040] Of course, in other embodiments, the limiting rod 321 can also be directly adjusted and fixed by using fasteners (such as screws, bolts, buckles, etc.).

[0041] Referring to Figures 1 to 6 , the supporting column 311 is provided with a notch 6, and the notch 6 is formed with a first inclined surface 61; one end of the limiting rod 321 close to the notch 6 has a second inclined surface 7 which cooperates with the first inclined surface 61.

[0042] Referring to Figures 1 to 6 , in order to limit the rotation and deviation of the limiting rod 321 and to increase the supporting effect of the limiting rod 321 on the supporting column 311, a guide structure 8 is further included, and the guide structure 8 comprises a guide groove 81 and a guide column 82; one of the guide groove 81 and the guide column 82 is arranged on the mounting block 5, and the other is arranged on the limiting rod 321.

[0043] Specifically, in the embodiment, the guide groove 81 is arranged on the limiting rod 321, and the guide column 82 is detachably arranged on the mounting block 5.

[0044] Referring to Figures 1 to 6, in order to further increase the first support seat 21 limiting effect, while facilitating the installation of each structure, in this embodiment, the main frame 1 comprises a bottom plate 11 and a limiting block 12; the limiting block 12 is fixed on the bottom plate 11, and the limiting block 12 is formed with a first limiting surface 121 for limiting the radial movement of the first support seat 21, and a second limiting surface 122 for limiting the axial movement of the first support seat 21.

[0045] Referring to Figures 1 to 6 , in order to further increase the fixing effect of the small head of the connecting rod, the fixing assembly 2 further comprises a second support seat 22; the second support seat 22 is arranged opposite to the first support seat 21 to clamp the long side segment 100; the main frame 1 further comprises a frame 13, and the second support seat 22 is installed on the frame 13.

[0046] Referring to Figures 1 to 6 , in order to further increase the fixing effect of the small head of the connecting rod, the side support block 9 symmetrically arranged on both sides of the auxiliary support assembly 3 is further included, and the side support block 9 is in abutment with the side wall surface of the small head.

[0047] The above-mentioned embodiments are only preferred embodiments of the present application, and cannot be used to limit the scope of protection of the present application. Any non-essential changes and replacements made by those skilled in the art on the basis of the present application shall fall within the scope of protection of the present application.

Claims

1. A connecting rod fixing device for fixing a small head of a connecting rod, the small head having a long side section (100) and a short side section (200), characterized in that, The utility model relates to a kind of frame structures, including main frame (1), and fixed component (2) and auxiliary support component (3) installed on main frame (1); The fixed component (2) includes a first support seat (21), and the upper end surface of the first support seat (21) is in contact with the end surface of the long side section (100), and a gap (4) is formed between the end surface of the short side section (200); The auxiliary support component (3) includes a support part (31) and a limiting part (32), the support part (31) is located at the gap (4), and the end surface of the short side section (200) is in contact with the end surface of the short side section (200), and the limiting part (32) can limit the movement of the support part (31).

2. A connecting rod fastening device according to claim 1, characterized in that It also includes a mounting block (5), and the end surface of one side of the mounting block (5) is in contact with the end surface of the first support seat (21), and the end surface of the other side is recessed downward to form a groove (51); The support part (31) includes a support column (311) and a first elastic member (312); The support column (311) is movably installed in the groove (51), one end of the first elastic member (312) is connected with the bottom wall of the groove (51), and the other end is connected with the support column (311) to drive the support column (311) to be in contact with the end surface of the short side section (200).

3. A connecting rod fastening device according to claim 2, characterized in that The mounting block (5) is also provided with a through groove (52) connected with the groove (51); The limiting part (32) includes a limiting rod (321), a second elastic member (322) and an eccentric wheel connecting rod mechanism (323); The limiting rod (321) is at least partially installed in the through groove (52); The second elastic member (322) drives one end of the limiting rod (321) to be in contact with the arc surface of the eccentric wheel connecting rod mechanism (323); When the eccentric wheel connecting rod mechanism (323) is at the dead point position, the end of the limiting rod (321) away from the eccentric wheel connecting rod mechanism (323) is in contact with the outer wall surface of the support column (311).

4. A connecting rod fastening device according to claim 3, characterized in that The support column (311) is provided with a notch (6), and a first inclined surface (61) is formed at the notch (6); The end of the limiting rod (321) close to the notch (6) has a second inclined surface (7) matched with the first inclined surface (61).

5. A connecting rod fastening device according to claim 3, wherein It also includes a guide structure (8), and the guide structure (8) includes a guide groove (81) and a guide column (82); One of the guide groove (81) and the guide column (82) is arranged on the mounting block (5), and the other is arranged on the limiting rod (321).

6. A connecting rod fastening device according to claim 3, wherein The central axis of the groove (51) is perpendicular to the central axis of the through groove (52).

7. A connecting rod fastening device according to claim 3, wherein The eccentric wheel connecting rod mechanism (323) includes a mounting seat (3231), an eccentric wheel (3232), a pin shaft (3233) and a gas cylinder (3234); The mounting seat (3231) is fixedly arranged on the main frame (1); The eccentric wheel (3232) is rotatably arranged on the mounting seat (3231), and the eccentric wheel (3232) is provided with a hinged position; The pin shaft (3233) is connected with the hinge position on the eccentric wheel (3232) at one end, and is rotatably connected with the telescopic end of the air cylinder (3234) at the other end; the air cylinder (3234) is rotatably installed on the main frame (1).

8. A connecting rod fastening device according to any one of claims 1-7, characterized in that The main frame (1) comprises a bottom plate (11) and a limiting block (12). The limiting block (12) is fixedly arranged on the bottom plate (11), and a first limiting surface (121) for limiting the radial movement of the first support seat (21) and a second limiting surface (122) for limiting the axial movement of the first support seat (21) are formed on the limiting block (12).

9. A connecting rod fastening device according to claim 8, characterized in that The fixing assembly (2) further comprises a second support seat (22). The second support seat (22) is arranged opposite to the first support seat (21) to clamp the long edge segment (100). The main frame (1) further comprises a frame (13), and the second support seat (22) is installed on the frame (13).

10. A connecting rod fastening device according to claim 1, characterized in that Further comprising side supporting blocks (9) symmetrically arranged on both sides of the auxiliary supporting assembly (3), and the side supporting blocks (9) abut against the side wall surface of the small head.

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