Connecting rod bushing press fitting device

Abstract

The utility model relates to a connecting rod bushing press-fitting device, which is used for press-fitting a bushing into a small end hole of a connecting rod, and comprises a main body, a lifting driving assembly, a pressing rod assembly, a clamp assembly and a driving assembly, the lifting driving assembly comprises a lifting rod mounted on the main body; the pressing rod assembly and the clamp assembly are distributed in the axial direction of the lifting rod and fixedly connected relative to the lifting rod so as to synchronously ascend and descend along with the lifting rod. The driving assembly comprises a power part and a transmission part, the power part is located on the radial sides of the pressing rod assembly and the clamp assembly, one end of the transmission part is connected with the power part, the other end of the transmission part is connected with the clamp assembly, and the bushing and connecting rod mounting device has the advantages that the bushing positioning precision is improved, and then the bushing and connecting rod mounting effect is improved.

Description

TECHNICAL FIELD

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

[0002] Connecting rod is the force movement piece of connecting engine piston, and should have enough strength under the action of reciprocating in cylinder, therefore, the bushing embedded in the small head inner hole of connecting rod needs to be durable and reliable.

[0003] In prior art, the press -fitting of connecting rod small head hole bushing usually adopts single column hydraulic press, which mainly includes main body, pressure rod assembly, clamp assembly, clamp driving assembly and lifting driving assembly, wherein, the clamp assembly is located at the lower end of the pressure rod assembly, the clamp driving assembly is used for driving the clamp assembly to fix the bushing, and the lifting driving assembly is used for driving the pressure rod assembly, clamp assembly and clamp driving assembly to descend synchronously, so as to press -fit the bushing into the small head hole of connecting rod. Due to the limitation of the structure of single column hydraulic press, the axial installation space of the pressure rod assembly, clamp assembly and clamp driving assembly is limited, in order to meet the installation of the connecting rod assembly, clamp assembly and clamp driving assembly, the overall length of the connecting rod assembly and clamp assembly is usually shortened in prior art.

[0004] However, the overall length reduction of the connecting rod assembly and clamp assembly will lead to the reduction of axial matching length, and then affect the positioning accuracy of the bushing and the installation effect of the bushing and connecting rod. UTILITY MODEL CONTENTS

[0005] The technical problem to be solved by the utility model is to overcome the defects in prior art, so as to provide a connecting rod bushing press -fitting device.

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

[0007] A connecting rod bushing press -fitting device is used for press -fitting the bushing into the small head hole of connecting rod, which comprises a main body, a lifting driving assembly, a pressure rod assembly, a clamp assembly and a driving assembly.

[0008] The lifting driving assembly comprises a lifting rod installed on the main body.

[0009] The pressure rod assembly and the clamp assembly are axially distributed along the lifting rod, and are fixedly connected with respect to the lifting rod, so as to be lifted synchronously with the lifting rod.

[0010] The driving assembly comprises a power part and a transmission part, the power part is located on the radial side of the pressure rod assembly and the clamp assembly, one end of the transmission part is connected with the power part, and the other end is connected with the clamp assembly.

[0011] Preferably, the power part comprises a power source and a connecting plate.

[0012] One end of the connecting plate is fixedly provided with the power source, and the other end is fixedly connected with the pressing rod assembly;

[0013] The connecting plate extends away from the center of the pressing rod assembly.

[0014] Preferably, the transmission part comprises a lever and a pull rod;

[0015] The lever is rotatably installed on the pressing rod assembly, and one end is movably connected with the telescopic end of the power source, and the other end is movably connected with the pull rod;

[0016] The pressing rod assembly is provided with an empty area for swinging of the lever;

[0017] The pull rod extends along the axial direction of the pressing rod assembly and the clamp assembly, and is connected with the clamp assembly.

[0018] Preferably, the main body comprises a first mounting seat and a second mounting seat;

[0019] The lifting rod is installed on the first mounting seat;

[0020] The second mounting seat is used for installing the connecting rod.

[0021] Preferably, it further comprises an auxiliary positioning assembly;

[0022] The auxiliary positioning assembly is symmetrically arranged with the power part about the central axis of the lifting rod.

[0023] Preferably, the auxiliary positioning assembly comprises a connecting block, a guide rod and a guide groove;

[0024] The connecting block is fixedly provided on the pressing rod assembly;

[0025] The guide rod is fixedly provided on the connecting block and extends along the axial direction of the lifting rod;

[0026] The guide groove is opened on the first mounting seat and is slidably connected with the guide rod.

[0027] Preferably, it further comprises a matching positioning device fixedly provided on the main body;

[0028] The matching positioning device comprises a top plate and a steel sleeve, the top plate is installed on the main body and encloses an installation area for installation of the connecting rod;

[0029] The steel sleeve is fixedly provided on the top plate, the steel sleeve is provided with a limiting hole, and the limiting hole can be matched with the outer wall surface of the bushing and the outer wall surface of the pressing rod assembly.

[0030] Preferably, a guide conical surface is arranged on one side of the bushing towards the limiting hole.

[0031] The diameter of the guide conical surface gradually decreases along the bushing towards the steel sleeve.

[0032] Compared with the prior art, the utility model has the beneficial effects that:

[0033] The connecting rod bushing press-fitting device has the power part of the driving assembly arranged on the radial side of the press rod assembly and the clamp assembly, and the power part drives the clamp assembly through the transmission part, so that the driving assembly can control the clamp assembly to clamp or release the bushing without affecting the axial installation of the press rod assembly and the clamp assembly, so that the press rod assembly and the clamp assembly can have sufficient axial length, and the axial fitting length of the press rod assembly and the axial fitting length of the clamp assembly are increased, so that the positioning accuracy of the bushing by the press rod assembly and the clamp assembly is increased, and the installation effect of the bushing and the connecting rod is ensured. BRIEF DESCRIPTION OF DRAWINGS

[0034] In order to more clearly illustrate the specific embodiments of the utility model or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0035] Figure 1 It is a structural schematic diagram of one of the examples of the utility model.

[0036] Figure 2 It is a structural schematic diagram of one of the examples of the utility model. Figure 1 It is a schematic diagram of another view.

[0037] Figure 3 It is a structural schematic diagram of one of the examples of the utility model. Figure 2 It is a sectional view along the A-A section.

[0038] Figure 4 It is a structural schematic diagram of one of the examples of the utility model. Figure 3 It is an enlarged schematic diagram of the D1 position.

[0039] Figure 5 It is a structural schematic diagram of one of the examples of the utility model. Figure 3 It is an enlarged schematic diagram of the D2 position.

[0040] Figure 6 It is a structural schematic diagram of one of the examples of the utility model. Figure 3 It is an enlarged schematic diagram of the D3 position.

[0041] Explanation of reference signs:

[0042] 100, bushing; 200, connecting rod; 201, small hole; 1, main body; 11, first mounting seat; 12, second mounting seat; 2, lifting driving assembly; 21, lifting rod; 3, pressing rod assembly; 301, empty area; 31, pressing head base; 32, taper seat; 33, pressing block seat; 4, clamp assembly; 5, driving assembly; 501, straight slot; 502, round shaft; 51, power part; 511, power source; 512, connecting plate; 52, transmission part; 521, lever; 522, pull rod; 6, auxiliary positioning assembly; 61, connecting block; 62, guide rod; 63, guide groove; 7, matching positioning device; 71, top plate; 711, mounting area; 72, steel sleeve; 721, limiting hole; 8, guide conical surface. DETAILED DESCRIPTION

[0043] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0044] In the description of the present application, it should be noted that the orientations or positional relationships indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. are based on the orientations or positional relationships shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application. In addition, the terms "first", "second", "third" are only for the purpose of description, and cannot be understood as indicating or implying relative importance.

[0045] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements. For those skilled in the art, the specific meanings of the above terms in the present application can be understood according to the specific circumstances.

[0046] Reference is made to Figures 1 to 6This utility model provides a connecting rod bushing pressing device for pressing a bushing 100 into the small end hole 201 of a connecting rod 200. The connecting rod bushing pressing device includes a main body 1, a lifting drive assembly 2, a pressure rod assembly 3, a clamping assembly 4, and a drive assembly 5. The lifting drive assembly 2 includes a lifting rod 21 mounted on the main body 1. The pressure rod assembly 3 and the clamping assembly 4 are axially distributed along the lifting rod 21 and are fixedly connected relative to the lifting rod 21 to move synchronously with it. The drive assembly 5 includes a power unit 51 and a transmission unit 52. The power unit 51 is located on the radial side of the pressure rod assembly 3 and the clamping assembly 4. One end of the transmission unit 52 is connected to the power unit 51, and the other end is connected to the clamping assembly 4.

[0047] It is easy to understand that the drive assembly 5 can drive the clamp assembly 4 to clamp the bushing 100, and the lifting rod 21 of the lifting drive assembly 2 can drive the pressure rod assembly 3, the clamp assembly 4, the drive assembly 5, and the bushing 100 to move down synchronously, so that the bushing 100 is pressed into the small end hole 201 of the connecting rod 200 (during this process, the pressure rod assembly 3 applies force to the bushing 100 axially, and the clamp assembly 4 applies force to the bushing 100 radially). After the bushing 100 is fully assembled into the small end hole 201 of the connecting rod 200, the drive assembly 5 drives the clamp assembly 4 to release the bushing 100, and the lifting rod 21 of the lifting drive assembly 2 then drives the pressure rod assembly 3, the clamp assembly 4, and the drive assembly 5 to move up synchronously, completing the entire pressing process of the bushing 100.

[0048] With the above scheme, the power unit 51 of the drive assembly 5 is set on the radial side of the pressure rod assembly 3 and the clamp assembly 4, and the power unit 51 drives the clamp assembly 4 through the transmission unit 52. This allows the drive assembly 5 to control the clamp assembly 4 to clamp or loosen the bushing 100 without affecting the axial installation of the pressure rod assembly 3 and the clamp assembly 4. This ensures that the pressure rod assembly 3 and the clamp assembly 4 can maintain sufficient axial length, thereby increasing the axial engagement length of the pressure rod assembly 3 and the clamp assembly 4, thus increasing the positioning accuracy of both on the bushing 100 and ensuring the installation effect of the bushing 100 and the connecting rod 200.

[0049] It is worth noting that the "axial direction" mentioned above refers to the direction of the central axis of the lifting rod 21 (i.e., Figure 3 The Y1 and Y2 directions shown above, the "radial" referred to above, are directions perpendicular to the central axis of the lifting rod 21 (i.e., Figure 3 (The X1 and X2 directions are shown).

[0050] See Figures 1 to 3In the embodiment, the main body 1 comprises a first mounting base 11 and a second mounting base 12; the lifting rod 21 is mounted on the first mounting base 11; and the second mounting base 12 is used for mounting the connecting rod 200. It is not difficult to understand that the axial height between the first mounting base 11 and the second mounting base 12 is limited, and the pressing rod assembly 3, the clamp assembly 4 and the driving assembly 5 are all mounted in the space formed between the first mounting base 11 and the second mounting base 12.

[0051] Referring to Figures 1 to 6 In the embodiment, the pressing rod assembly 3 is provided in a split structure, and specifically comprises a pressing head base 31, a taper base 32 and a pressing block base 33. Of course, in other embodiments, the pressing rod assembly 3 can also be provided in an integrated structure.

[0052] Further, the clamp assembly 4 is provided as a rubber expansion sleeve, the lower end of the rubber expansion sleeve is connected with the transmission part 52, and the inner wall of the rubber expansion sleeve is matched with the tapered surface of the lower end of the taper base 32. When the transmission part 52 drives the rubber expansion sleeve to move upward, the rubber expansion sleeve is in contact with the position with larger diameter of the tapered surface of the lower end of the taper base 32, and expands along the radial direction, so that the outer wall surface of the rubber expansion sleeve can be tightly abutted against the inner wall of the bushing 100, and the fixing effect of the bushing 100 is increased.

[0053] The driving assembly 5 can be provided in various structures, so that the main body structure (such as the power part 51) of the driving assembly 5 is arranged on the radial side of the pressing rod assembly 3 and the clamp assembly 4, so that the driving assembly 5 will not affect the axial installation of the pressing rod assembly 3 and the clamp assembly 4.

[0054] Referring to Figures 1 to 6 In the embodiment, the power part 51 comprises a power source 511 and a connecting plate 512. The power source 511 is fixedly arranged at one end of the connecting plate 512, and the other end of the connecting plate 512 is fixedly connected with the pressing rod assembly 3; and the connecting plate 512 extends away from the center of the pressing rod assembly 3.

[0055] Specifically, the power source 511 can be provided as a driving structure such as a pneumatic cylinder or an electric push rod. The connecting plate 512 comprises an axial extension plate and a radial extension plate, wherein the axial extension plate is fixedly mounted on the pressing rod assembly 3, and the radial extension plate is used for mounting the power source 511.

[0056] Further, the transmission part 52 comprises a lever 521 and a pull rod 522. The lever 521 is rotatably mounted on the pressing rod assembly 3, and one end of the lever 521 is movably connected with the telescopic end of the power source 511, and the other end of the lever 521 is movably connected with the pull rod 522; the pressing rod assembly 3 is provided with an empty area 301 for swinging of the lever 521; and the pull rod 522 extends along the axial direction of the pressing rod assembly 3 and the clamp assembly 4, and is connected with the clamp assembly 4.

[0057] It is worth mentioning that there are many ways of "movable connection", in this embodiment, straight grooves 501 are formed at both ends of the lever 521, and a round shaft 502 is arranged at the end of the power source 511 and the pull rod 522, and the straight grooves 501 and the round shaft 502 are movably connected with each other.

[0058] Referring to Figures 1 to 6 In order to further increase the positioning accuracy and avoid the driving pressure rod assembly 3, the clamp assembly 4 and the driving assembly 5 from deviating from the axial direction during the lifting process of the lifting rod 21, in this embodiment, an auxiliary positioning assembly 6 is further included, and the auxiliary positioning assembly 6 is symmetrically arranged with the power part 51 about the central axis of the lifting rod 21. On the one hand, the auxiliary positioning assembly 6 can be used to guide the lifting, and on the other hand, the weight of the auxiliary positioning assembly 6 can balance the weight of the power part 51, so that the overall force on the radial side of the lifting rod 21, the pressure rod assembly 3 and the clamp assembly 4 is more balanced, further avoiding the axial deviation during the lifting process, further increasing the positioning accuracy of the bushing 100 and the small head hole 201 of the connecting rod 200, and increasing the assembly effect of the two.

[0059] Specifically, the auxiliary positioning assembly 6 includes a connecting block 61, a guide rod 62 and a guide groove 63; the connecting block 61 is fixedly arranged on the pressure rod assembly 3; the guide rod 62 is fixedly arranged on the connecting block 61 and extends along the axial direction of the lifting rod 21; and the guide groove 63 is formed in the first mounting seat 11 and is in sliding fit with the guide rod 62.

[0060] Referring to Figures 1 to 6 In this embodiment, a matching positioning device 7 is further included and is fixedly arranged on the main body 1; the matching positioning device 7 includes a top plate 71 and a steel sleeve 72; the top plate 71 is mounted on the main body 1 and encloses an installation area 711 for mounting the connecting rod 200; and the steel sleeve 72 is fixedly arranged on the top plate 71 and is provided with a limiting hole 721, which can be matched with the outer wall surface of the bushing 100 and the outer wall surface of the pressure rod assembly 3.

[0061] It is not difficult to understand that the increase of the axial length of the pressure rod assembly 3 and the clamp assembly 4 can not only increase the positioning accuracy of itself, but also make it matched with the limiting hole 721, further increasing the positioning accuracy of the bushing 100 and avoiding the deviation of the bushing 100 during the process of gradually assembling into the small head hole 201.

[0062] Further, in order to facilitate the bushing 100 and the pressure rod assembly 3 to extend into the limiting hole 721, in this embodiment, a guide conical surface 8 is arranged on the side of the limiting hole 721 facing the bushing 100; and the diameter of the guide conical surface 8 gradually decreases along the direction from the bushing 100 to the steel sleeve 72.

[0063] 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 bushing pressing device for pressing a bushing (100) into the small end hole (201) of a connecting rod (200), characterized in that, It includes a main body (1), a lifting drive assembly (2), a pressure rod assembly (3), a clamp assembly (4), and a drive assembly (5); The lifting drive assembly (2) includes a lifting rod (21) mounted on the main body (1); The pressure rod assembly (3) and the clamp assembly (4) are distributed along the axial direction of the lifting rod (21), and are fixedly connected relative to the lifting rod (21) so as to rise and fall synchronously with the lifting rod (21); The drive assembly (5) includes a power unit (51) and a transmission unit (52). The power unit (51) is located on the radial side of the pressure rod assembly (3) and the clamp assembly (4). One end of the transmission unit (52) is connected to the power unit (51), and the other end is connected to the clamp assembly (4).

2. The connecting rod bushing pressing device according to claim 1, characterized in that, The power unit (51) includes a power source (511) and a connecting plate (512); The power source (511) is fixedly mounted on one end of the connecting plate (512), and the other end is fixedly connected to the pressure rod assembly (3); The connecting plate (512) extends away from the center of the pressure bar assembly (3).

3. The connecting rod bushing pressing device according to claim 2, characterized in that, The transmission part (52) includes a lever (521) and a pull rod (522); The lever (521) is rotatably mounted on the pressure rod assembly (3), with one end movably connected to the telescopic end of the power source (511) and the other end movably connected to the pull rod (522); The lever assembly (3) is provided with an empty area (301) for the lever (521) to swing; The pull rod (522) extends along the axial direction of the pressure rod assembly (3) and the clamp assembly (4) and is connected to the clamp assembly (4).

4. The connecting rod bushing pressing device according to claim 1, characterized in that, The main body (1) includes a first mounting base (11) and a second mounting base (12); The lifting rod (21) is mounted on the first mounting base (11); The second mounting base (12) is used to mount the connecting rod (200).

5. A connecting rod bushing pressing device according to claim 4, characterized in that, It also includes an auxiliary positioning component (6); The auxiliary positioning component (6) and the power unit (51) are symmetrically arranged about the central axis of the lifting rod (21).

6. The connecting rod bushing pressing device according to claim 5, characterized in that, The auxiliary positioning component (6) includes a connecting block (61), a guide rod (62), and a guide groove (63); The connecting block (61) is fixed to the pressure rod assembly (3); The guide rod (62) is fixed on the connecting block (61) and extends along the axial direction of the lifting rod (21); The guide groove (63) is formed on the first mounting base (11) and is slidably connected to the guide rod (62).

7. A connecting rod bushing pressing device according to any one of claims 1-6, characterized in that, It also includes a mating positioning device (7) fixed on the main body (1); The positioning device (7) includes a top plate (71) and a steel sleeve (72). The top plate (71) is installed on the main body (1) and forms an installation area (711) for the connecting rod (200) to be installed. The steel sleeve (72) is fixed on the top plate (71). The steel sleeve (72) is provided with a limiting hole (721). The limiting hole (721) can cooperate with the outer wall surface of the bushing (100) and the outer wall surface of the pressure rod assembly (3).

8. A connecting rod bushing pressing device according to claim 7, characterized in that, The limiting hole (721) is provided with a guide cone surface (8) on the side facing the bushing (100); Along the bushing (100) toward the steel sleeve (72), the diameter of the guide cone surface (8) gradually decreases.

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