Rough boring clamp for large-end hole of connecting rod

Abstract

The utility model relates to a connecting rod big end hole rough boring clamp, a connecting rod is provided with a big end and a small end, the connecting rod big end hole rough boring clamp comprises a mounting plate, a small end positioning assembly, a big end positioning assembly and a pressing assembly, and the pressing assembly is used for abutting against the upper side wall of the big end of the connecting rod in the vertical direction; the large head positioning assembly comprises a driving sub-assembly and two positioning pieces, and the two positioning pieces are arranged at the output end of the driving sub-assembly so that the two positioning pieces can be simultaneously and correspondingly close to or away from two outer side arc-shaped walls oppositely arranged at the large head of the connecting rod in the first direction. The two side walls, close to each other, of the two positioning pieces are each provided with a positioning face capable of abutting against the arc-shaped wall on the outer side of the connecting rod, and the positioning faces are inclined and face the mounting plate. Positioning and clamping of the connecting rod big end are more stable, the axis of a connecting rod big end hole cannot deviate after clamping is completed, the stability of follow-up machining of the connecting rod big end hole is guaranteed, the combined module of the whole clamp can be obtained through machining, the manufacturing cost is low, and manufacturing is easy.

Description

Technical Field

[0001] The utility model relates to the technical field of connecting rod rough boring, in particular to a connecting rod big end hole rough boring fixture. Background Art

[0002] At present, the connecting rod big head hole rough boring fixture used on milling machines is mainly hydraulic fixture, which has high manufacturing and procurement prices, and the hydraulic fixture can only clamp the connecting rod big head in the horizontal direction. After clamping, an external pressure plate is required to make the lower side wall of the connecting rod big head press against the support surface to ensure the stability of the connecting rod big head hole processing. However, after the fixture clamps the connecting rod in the horizontal direction, it cannot guarantee that the lower side wall of the connecting rod big head is in contact with the support surface, but can only guarantee the position accuracy of the connecting rod big head hole axis. However, when pressed by the external pressure plate, the lower side wall of the connecting rod big head will press against the support surface, and the connecting rod big head will move in the vertical direction, but this may cause the connecting rod big head hole axis to offset, resulting in errors in subsequent processing. A connecting rod big head hole rough boring fixture is specially designed to solve the above problems. Utility Model Content

[0003] The utility model provides a connecting rod big end hole rough boring fixture, the positioning clamping of the connecting rod big end is more stable, and the axis of the connecting rod big end hole will not deviate after the clamping is completed, thereby ensuring the stability of subsequent connecting rod big end hole processing, and the combined module of the entire fixture can be obtained through processing, with low cost and simple manufacturing.

[0004] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0005] A connecting rod big end hole rough boring fixture, the connecting rod has a big end and a small end, comprising a mounting plate and a small end positioning assembly provided on the mounting plate, a big end positioning assembly and a pressing assembly, the pressing assembly being used to press against the upper side wall of the big end of the connecting rod in the vertical direction;

[0006] The big end positioning assembly includes a driving subassembly and two positioning members, both of which are provided at the output end of the driving subassembly so that the two positioning members simultaneously approach or move away from two oppositely disposed outer arc walls of the big end of the connecting rod along the first direction;

[0007] Both side walls of the two positioning members that are close to each other are provided with positioning surfaces that can abut against the outer arc-shaped wall of the connecting rod, and the positioning surfaces are inclined and arranged toward the mounting plate.

[0008] Preferably, the driving subassembly comprises a mounting block, a screw and two moving blocks;

[0009] The mounting block is mounted on the mounting plate, the screw is rotatably mounted on the mounting block along a first direction, and both ends of the screw are provided with threads, and the two threads rotate in opposite directions, the two movable blocks are respectively threadedly mounted on the two threads, and are respectively slidably mounted on both ends of the mounting plate along the first direction;

[0010] The two positioning members are respectively mounted on the two moving blocks.

[0011] Preferably, the upper side wall of the above-mentioned mounting block and the two side walls distributed along the first direction form a guide groove with a door-shaped structure, the above-mentioned movable block is an L-shaped structure, the two above-mentioned movable blocks are respectively slidably arranged at the two ends of the above-mentioned guide groove, and the above-mentioned positioning member is installed at the upper end of the above-mentioned movable block.

[0012] Preferably, the upper end of the movable block is located above the mounting block, and both side walls of the movable block arranged along the first direction are provided with limiting grooves, and the upper side wall of the mounting block on the same side of the limiting groove is provided with an anti-lifting block, the end of the anti-lifting block is inserted into the limiting groove, and the lower side wall of the anti-lifting block is in contact with the lower groove wall horizontally arranged in the limiting groove.

[0013] Preferably, the positioning member includes a positioning block and a positioning portion, the positioning portion is provided on a side wall of the positioning block close to the connecting rod big end, and the positioning surface is located on a side wall of the positioning portion facing the outer arc-shaped wall of the connecting rod big end;

[0014] The positioning block is mounted on the moving block.

[0015] Preferably, a mounting groove is provided on the lower side wall of the positioning block, the upper end portion of the moving block is provided in the mounting groove, and the positioning member is detachably connected to the upper end portion of the moving block.

[0016] Preferably, the clamping assembly includes two pressure plate assemblies provided on the mounting plate, and the two pressure plate assemblies are respectively located on the same side of the two positioning members and are respectively used to press against the upper side wall of the connecting rod big end on the same side.

[0017] Preferably, the pressing plate assembly comprises a pressing plate, a first support member and a second support member, and the pressing plate can be detachably mounted on the first support member and the second support member.

[0018] Preferably, two positioning columns are further provided on the mounting plate, and the two positioning columns are respectively provided on both sides of the connecting rod, and one of the positioning columns is located at the outer side wall of the connecting rod big end.

[0019] Preferably, a small head support block and two large head support blocks are further provided on the upper side wall of the mounting plate, and the small head support block and the upper side wall of the large head support block are flush with each other.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] 1. The driving subassembly controls the simultaneous movement of the two positioning parts, making the positioning and clamping of the connecting rod big end more stable, and the horizontal placement position after clamping more accurate, that is, the position of the axis of the connecting rod big end hole more accurate.

[0022] 2. The positioning surface is tilted downward so that the two positioning surfaces can clamp the big end of the connecting rod in the horizontal direction while exerting downward pressure on the big end of the connecting rod to achieve compression in the vertical direction. That is, the positioning surface can stably realize the horizontal positioning, clamping and preliminary pre-tightening of the big end of the connecting rod, so that the lower side wall of the big end of the connecting rod is pressed against the support surface, and then compressed by the pressure plate assembly, which can avoid the displacement of the axis of the big end hole of the connecting rod after clamping, thereby ensuring the stability of subsequent processing. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the specific embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0024] Figure 1 The overall schematic diagram of the clamp in the embodiment of the present invention Figure 1 ;

[0025] Figure 2 The overall schematic diagram of the clamp in the embodiment of the present invention Figure 2 ;

[0026] Figure 3 A top view of a clamp according to an embodiment of the present invention;

[0027] Figure 4 This is a schematic diagram of a large head positioning assembly according to an embodiment of the present invention;

[0028] Figure 5 This is a partial schematic diagram of a large head positioning assembly in an embodiment of the present invention;

[0029] Figure 6 This is a schematic diagram of an installation block in an embodiment of the present invention;

[0030] Figure 7 This is a schematic diagram of the installation of the moving block and positioning member in an embodiment of the present invention.

[0031] Description of reference numerals:

[0032] 1. Mounting plate; 2. Small head positioning assembly; 21. Small head positioning column; 3. Large head positioning assembly; 31. Mounting block; 311. Guide groove; 32. Screw; 33. Handle; 34. Moving block; 341. Limiting groove; 35. Positioning member; 351. Positioning block; 352. Positioning part; 353. Positioning surface; 36. Anti-lifting block; 4. Pressing plate assembly; 41. Pressing plate; 42. First support member; 43. Second support member; 5. Positioning column; 6. Adjusting block; 7. Small head support block; 8. Large head support block; 9. Connecting rod. DETAILED DESCRIPTION

[0033] The technical solution of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the embodiments described are only some embodiments of the present invention, not all embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments of the present invention without making any creative efforts shall fall within the scope of protection of the present invention.

[0034] In the description of the present invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are intended solely to facilitate and simplify the description of the present invention. They are not intended to indicate or imply that the devices or components referred to must have, be constructed, or operate in a specific orientation, and therefore should not be construed as limitations on the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0036] like Figure 1-4As shown, an embodiment of the utility model provides a rough boring fixture for the big head hole of a connecting rod, wherein the connecting rod 9 has a big head and a small head, and comprises a mounting plate 1 and a small head positioning component 2, a big head positioning component 3 and a pressure plate component 4 arranged on the mounting plate 1; wherein the small head positioning component 2 is used to position the small head hole, and specifically comprises a small head positioning column 21, and the small head positioning column 21 is mounted on the mounting plate 1 by bolts, and the small head hole of the connecting rod 9 is sleeved on the outside of the small head; the big head positioning component 3 is used to position and clamp the outer side wall of the big head of the connecting rod 9, and the pressure plate component 4 is used to press the big head of the connecting rod 9 in the vertical direction, so that the lower side wall of the big head of the connecting rod 9 will not move in the vertical direction, and the positioning, clamping and pressing of the connecting rod 9 are completed through the cooperation of the above components.

[0037] Specifically, the big head positioning assembly 3 specifically includes a driving subassembly and two positioning members 35. The two positioning members 35 are both installed at the output end of the driving subassembly. The big head of the connecting rod 9 is located between the two positioning members 35. Starting the driving subassembly can make the two positioning members 35 simultaneously approach or move away from the two outer arc-shaped walls relatively set at the big head of the connecting rod 9 along the first direction. When the two positioning members 35 approach at the same time, the two positioning members 35 will correspondingly abut the upper parts of the two outer arc-shaped walls relatively set at the big head of the connecting rod 9, thereby realizing the clamping and positioning of the big head of the connecting rod 9. On the one hand, the operation is simple, and on the other hand, the accuracy of the axial position of the big head hole of the connecting rod 9 can be guaranteed.

[0038] Specifically, the two side walls adjacent to each other of the two positioning members 35 are provided with positioning surfaces 353, wherein the positioning surfaces 353 are inclined and set toward the mounting plate 1, that is, downward. When the two positioning members 35 clamp the big end of the connecting rod 9, the positioning surfaces 353 on the two positioning members 35 are respectively inclined downward to abut against the corresponding outer arc wall, and at the same time, apply oblique downward pressure to the big end of the connecting rod 9, so that the big end of the connecting rod 9 is not only stably clamped in the horizontal direction, but also achieves preliminary clamping in the vertical direction after the clamping is completed. The lower side wall of the big end of the connecting rod 9 is pressed against the support surface, and then pressed by the pressure plate assembly 4, which can avoid the big end of the connecting rod 9 from moving in the vertical direction after being clamped, thereby preventing the axis of the hole of the big end of the connecting rod 9 from being offset, thereby ensuring the subsequent processing stability.

[0039] Specifically, in order to achieve the simultaneous approach or separation of the two positioning members 35 along the first direction, in this embodiment, the driving subassembly includes a mounting block 31, a screw 32 and two moving blocks 34. The mounting block 31 is located on the same side of the big end of the connecting rod 9 after installation. At the same time, the mounting block 31 is mounted on the mounting plate 1 by bolts. The mounting block 31 is provided with a rotating through hole along the first direction. The screw 32 is stably rotated and mounted on the rotating through hole by a bearing. Both ends of the screw 32 are provided with threads, and the two sections of the threads rotate in opposite directions. The two moving blocks 34 are respectively threaded on the two sections of the threads. On the mounting plate 1, and respectively slidably disposed at both ends of the mounting plate 1, correspondingly, the two positioning members 35 are respectively mounted on the two moving blocks 34, so that after the connecting rod 9 is placed on the mounting plate 1, the large end of the connecting rod 9 is located between the two positioning members 35. When positioning, it is only necessary to rotate the screw 32, and through the two sections of thread, the two moving blocks 34 are driven to move closer or farther away from each other at both ends of the mounting plate 1 along the first direction, and finally the positioning surfaces 353 of the two positioning members 35 are respectively pressed against the two outer arc walls at the large end of the connecting rod 9, thereby achieving stable clamping and positioning of the two outer walls of the large end of the connecting rod 9. A handle 33 is provided at the end of the screw 32. The handle 33 is star-shaped, which is convenient for the user to rotate the screw 32, and the thread on the screw 32 is a T-type thread.

[0040] Specifically, in order to realize the sliding installation of the two moving blocks 34, as shown in FIG. Figure 5-7 As shown, in this embodiment, a guide groove 311 of a door-shaped structure is provided on the upper side wall of the mounting block 31 and the two side walls distributed along the first direction. The two ends of the guide groove 311 along the first direction are respectively L-shaped structures. Correspondingly, the movable block 34 is set to an L-shaped structure, and the two movable blocks 34 are respectively slidably arranged at the two ends of the guide groove 311 to realize the guided sliding of the movable block 34. The L-shaped sliding makes the movement stability of the movable block 34 along the first direction better. Moreover, the L-shaped structure of the movable block 34 has a larger connection area on the upper part while ensuring the structural strength. When the positioning member 35 is connected to the upper part of the movable block 34, the connection strength is better.

[0041] Specifically, the upper end of the moving block 34 is located above the mounting block 31, and both side walls of the moving block 34 set along the first direction are provided with a limiting groove 341, which is more convenient to process. The upper side wall of the mounting block 31 on the same side of the limiting groove 341 is provided with an anti-lifting block 36, and the end of the anti-lifting block 36 is inserted into the limiting groove 341, and the lower side wall of the anti-lifting block 36 is in contact with the lower groove wall set horizontally in the groove. In actual use, since the positioning surface 353 of the positioning member 35 abuts the large end of the connecting rod 9, When the outer curved wall is pressed against the outer curved wall, the positioning surface 353 applies an oblique downward pressure to it, and correspondingly, the outer curved wall of the big end of the connecting rod 9 will feed back an oblique upward force to the positioning surface 353, which will force the positioning member 35 and the moving block 34 to move upward. Since the lower side wall of the anti-lifting block 36 abuts against the lower side wall of the limiting groove 341, the moving block 34 is prevented from moving upward, and the upward action of the threads on the moving block 34 and the screw 32 is avoided, which will affect the rotation of the screw 32, thereby ensuring the smooth rotation of the screw 32.

[0042] Specifically, in this embodiment, the positioning member 35 includes a positioning block 351 and a positioning portion 352, wherein the positioning portion 352 is mounted on the side wall of the positioning block 351 near the large end of the connecting rod 9, and the positioning surface 353 is located on the side wall of the positioning portion 352 facing the outer curved wall of the large end of the connecting rod 9, so as to avoid the entire positioning member 35 from being too high, so that the positioning portion 352 extends on the horizontal plane, and the horizontal mounting surface area of ​​the mounting plate 1 is fully utilized, wherein the positioning block 351 is mounted on the movable block 34 and moves with the movable block 34. Specifically, a mounting groove is provided on the lower side wall of the positioning block 351, and the upper end of the movable block 34 is mounted in the mounting groove, and the positioning member 35 and the upper end of the movable block 34 are detachably connected. In this embodiment, the mounting groove is a through groove along the first direction, which is easy to process, and the upper end of the movable block 34 is mounted in the groove by bolts.

[0043] Specifically, the clamping assembly includes two pressure plate assemblies 4 provided on the mounting plate 1. The pressure plate assemblies 4 are both installed on the mounting plate 1 to further ensure that the large end of the connecting rod 9 is stably pressed. Moreover, the two pressure plate assemblies 4 are respectively located on the same side of the two positioning members 35 and are respectively used to press against the upper side wall of the large end of the connecting rod 9 on the same side, ensuring that both sides of the large end of the connecting rod 9 are pressed against and that the pressure is uniform. By re-installing the pressure plate assembly 4, the positioning surface 353 clamps the large end of the connecting rod 9 while pre-tightening the large end of the connecting rod 9, thereby ensuring that the large end of the connecting rod 9 will not move during the subsequent process of the pressure plate assembly 4 pressing against the large end of the connecting rod 9. Then, the pressure plate assembly 4 is used to stably press the large end of the connecting rod 9, ensuring the stability of the large end hole of the connecting rod 9 during processing.

[0044] Specifically, in this embodiment, the pressure plate assembly 4 includes a pressure plate 41, a first support member 42, and a second support member 43. The pressure plate 41 can be detachably mounted on the first support member 42 and the second support member 43. The pressure plate 41 is supported by the first support member 42 and the second support member 43. On the one hand, the supporting force of the pressure plate 41 is increased. On the other hand, the stable positioning of the pressure plate 41 is achieved through the two support points, thereby preventing the position of the pressure plate 41 from moving during the processing of the large end hole of the connecting rod 9. Specifically, the first support member 42 can be a double-headed screw 32, and the second support member 43 can be a stud. The end of the pressure plate 41 away from the connecting rod 9 is provided with a first through hole and a second through hole. The double-headed screw 32 passes through the first through hole. The pressure plate 41 is fastened by upper and lower nuts. The upper part of the bolt passes through the second through hole. The nut and the gasket fasten the pressure plate 41. The pressure plate 41 is pressed against the side wall of the large end of the connecting rod 9, which is convenient for removal of the pressure plate 41 after use.

[0045] The locating post 5 is located on the outer wall of the connecting rod 9 and is very close to the outer wall of the connecting rod 9. The locating post 35 is used to clamp the outer wall of the connecting rod 9 and to clamp the connecting rod 9. After the connecting rod 9 is correctly installed, the front side is facing upward, and the locating post 5 will not interfere with the installation of the connecting rod 9 between the two locating pieces 35. When the connecting rod 9 is incorrectly installed and the back side is facing upward, the locating post 5 will be blocked by the outer locating post 5 during the installation process, so that the connecting rod 9 cannot be placed. The setting position of the locating post 5 avoids the situation that the connecting rod 9 is incorrectly installed on the fixture, thereby avoiding the occurrence of unqualified products. Specifically, in this embodiment, in order to adjust the position of the positioning column 5, a thread is provided at the lower end of the positioning column 5, which is threadedly connected to the adjustment block 6. The adjustment block 6 is provided with a waist-shaped hole and is connected to the mounting plate 1 by bolts. The position of the adjustment block 6 can be adjusted through the waist-shaped hole, and then the position of the positioning column 5 can be adjusted to adapt to connecting rods 9 of different sizes.

[0046] Specifically, in order to ensure that the lower end support surface of the connecting rod 9 is flush, a small head support block 7 and two large head support blocks 8 are provided on the upper side wall of the mounting plate 1. The small head support block 7 is used to support the connection point between the small head of the connecting rod 9 and the connecting arm. The two large head support blocks 8 are respectively located below the opposite ends of the large head of the connecting rod 9, realizing three-point support of the connecting rod 9, which is more stable. Moreover, the upper side walls of the small head support block 7 and the large head support block 8 are flush, ensuring that the lower side wall of the large head of the connecting rod 9 and the lower side wall of the lower head are on the same horizontal plane after support, which provides convenience for subsequent processing and avoids processing errors caused by uneven support surfaces.

[0047] The mounting plate 1, the small head positioning assembly 2, the components within the large head positioning assembly 3, the pressure plate assembly 4 and the processed parts within the mounting column in the above-mentioned fixture can be obtained by self-processing, which is low in cost. Moreover, all components are connected by detachable means (bolts, etc.), and can be disassembled and replaced at any time, making them more convenient to use.

[0048] The above-mentioned embodiments are only preferred embodiments of the present invention and cannot be used to limit the scope of protection of the present invention. Any non-substantial changes and replacements made by technicians in this field on the basis of the present invention fall within the scope of protection required by the present invention.

Claims

1. A rough boring fixture for connecting rod big end hole, the connecting rod has a big end and a small end, characterized in that: It comprises a mounting plate and a small head positioning assembly, a large head positioning assembly and a pressing assembly provided on the mounting plate, wherein the pressing assembly is used to press against the upper side wall of the large head of the connecting rod in the vertical direction; The big end positioning assembly includes a driving subassembly and two positioning members, both of which are provided at the output end of the driving subassembly so that the two positioning members are simultaneously close to or away from two oppositely arranged outer arc walls of the big end of the connecting rod along the first direction; Both side walls of the two positioning members that are close to each other are provided with positioning surfaces that can abut against the outer arc-shaped wall of the connecting rod, and the positioning surfaces are inclined and arranged toward the mounting plate.

2. The connecting rod big end hole rough boring fixture according to claim 1, characterized in that: The driving subassembly includes a mounting block, a screw and two moving blocks; The mounting block is provided on the mounting plate, the screw is rotatably provided on the mounting block along a first direction, and both ends of the screw are provided with threads, and the two threads rotate in opposite directions, the two moving blocks are respectively threadedly installed on the two threads, and are respectively slidably provided at both ends of the mounting plate along the first direction; The two positioning members are respectively mounted on the two moving blocks.

3. The connecting rod large end hole rough boring fixture according to claim 2, characterized in that: The upper side wall of the mounting block and the two side walls distributed along the first direction form a guide groove with a door-shaped structure. The movable block is an L-shaped structure. The two movable blocks are respectively slidably arranged at the two ends of the guide groove, and the positioning member is installed at the upper end of the movable block.

4. The connecting rod big end hole rough boring fixture according to claim 3, characterized in that: The upper end of the movable block is located above the mounting block, and both side walls of the movable block arranged along the first direction are provided with limiting grooves, and the upper side wall of the mounting block on the same side of the limiting groove is provided with an anti-lifting block, the end of the anti-lifting block is inserted into the limiting groove, and the lower side wall of the anti-lifting block is in contact with the lower groove wall horizontally arranged in the limiting groove.

5. The connecting rod large end hole rough boring fixture according to claim 2, characterized in that: The positioning member includes a positioning block and a positioning portion, wherein the positioning portion is provided on a side wall of the positioning block close to the connecting rod big end, and the positioning surface is located on a side wall of the positioning portion facing the outer arc-shaped wall of the connecting rod big end; The positioning block is mounted on the moving block.

6. The connecting rod large end hole rough boring fixture according to claim 5, characterized in that: The lower side wall of the positioning block is provided with a mounting groove, the upper end portion of the moving block is arranged in the mounting groove, and the positioning piece is detachably connected to the upper end portion of the moving block.

7. The connecting rod big end hole rough boring fixture according to claim 1, characterized in that: The clamping assembly includes two pressing plate assemblies arranged on the mounting plate. The two pressing plate assemblies are respectively located on the same side of the two positioning members and are respectively used to press against the upper side wall of the connecting rod big end on the same side.

8. The connecting rod big end hole rough boring fixture according to claim 7, characterized in that: The pressing plate assembly includes a pressing plate, a first support member and a second support member, and the pressing plate can be detachably mounted on the first support member and the second support member.

9. The connecting rod big end hole rough boring fixture according to claim 1, characterized in that: Two positioning columns are also provided on the mounting plate. The two positioning columns are respectively provided on both sides of the connecting rod, and one of the positioning columns is located at the outer side wall of the connecting rod big end.

10. The connecting rod large end hole rough boring fixture according to claim 1, characterized in that: A small head support block and two large head support blocks are further provided on the upper side wall of the mounting plate, and the small head support block and the upper side wall of the large head support block are flush.

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