Rough boring clamp for automobile connecting rod

Abstract

The utility model relates to the technical field of heavy boring, and discloses a heavy boring clamp for an automobile connecting rod, which comprises a workpiece bottom plate, a supporting plate fixedly connected to the top of the bottom plate, a supporting table fixedly connected to the top of the supporting plate, a motor fixedly connected to the top of the bottom plate, a threaded rod fixedly connected to the output end of the motor, and a clamping device fixedly connected to the threaded rod. A connecting plate is arranged on the outer wall of the threaded rod, a connecting shaft is fixedly connected to the top of the connecting plate, a limiting plate is fixedly connected to the top of the supporting table, a first pressing plate is fixedly connected to the outer wall of the connecting shaft, a V-shaped pressing block is fixedly connected to the inner side of the first pressing plate, and a second pressing plate is arranged on the top of the first pressing plate. According to the heavy boring clamp for the automobile connecting rod, the centering performance of the connecting rod can be effectively guaranteed only through one-time clamping operation by means of the self-centering function of the V-shaped pressing block, and therefore the strict requirement for form and location tolerance is accurately met, and the position precision of connecting rod machining is greatly improved.

Description

Technical Field

[0001] This utility model relates to the field of rough boring technology, specifically a rough boring fixture for automotive connecting rods. Background Technology

[0002] The rough boring process is performed after the two planes of the connecting rod are roughly ground. The fixture uses V-shaped pressure blocks to press down on the arc surfaces on both sides of the connecting rod. Although this ensures the self-centering of the connecting rod and allows it to move automatically to the center of the fixture, the pressure point is on the side arc and there is no support point below. This results in a large deformation of the large hole after the connecting rod is machined, with a roundness of 0.015mm, while the process requirement is 0.008mm.

[0003] Common rough boring fixtures for automotive connecting rods lack self-centering capabilities, making it difficult to accurately determine the connecting rod's center position during clamping. This results in significant variations in the connecting rod's posture within the fixture after each clamping, leading to uneven distribution of machining allowance. During rough boring of large holes, this uneven allowance causes fluctuations in tool cutting forces, affecting tool life. It also increases the frequency and difficulty of adjustments during machining, ultimately reducing production efficiency. Utility Model Content

[0004] The purpose of this invention is to provide a rough boring jig for automotive connecting rods to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a rough boring jig for an automotive connecting rod, comprising a base plate, a support plate fixedly connected to the top of the base plate, and a support platform fixedly connected to the top of the support plate;

[0006] A motor is fixedly connected to the top of the base plate, a threaded rod is fixedly connected to the output end of the motor, a connecting plate is provided on the outer wall of the threaded rod, a connecting shaft is fixedly connected to the top of the connecting plate, a limit plate is fixedly connected to the top of the support platform, a first pressure plate is fixedly connected to the outer wall of the connecting shaft, a V-shaped pressure block is fixedly connected to the inner side of the first pressure plate, a second pressure plate is provided on the top of the first pressure plate, a limit pressure block is fixedly connected to the bottom of the second pressure plate, and a pressure plate guide post is provided inside the second pressure plate.

[0007] Preferably, the second laminate is fixedly connected to the outer wall of the connecting shaft.

[0008] Preferably, the second laminate is provided with a gap adjustment tool inside, and the workpiece is provided on the top of the support platform.

[0009] Preferably, the limiting plate has a sliding hole inside, and the connecting shaft is slidably connected to the inner wall of the sliding hole to stably limit the movement of the connecting shaft.

[0010] Preferably, the support platform has a through hole inside, and the connecting shaft passes through the through hole and moves, so that the connecting shaft can move through the through hole.

[0011] Preferably, the connecting plate has a threaded hole inside, and the connecting plate is threaded to the outer wall of the threaded rod through the threaded hole, so that the rotational motion of the threaded rod is converted into the linear motion of the connecting plate.

[0012] Preferably, the midpoint of the motor output end and the midpoint of the threaded rod output shaft are on the same vertical line, ensuring that the motor can stably drive the threaded rod to rotate.

[0013] Compared with the prior art, this utility model provides a rough boring jig for automotive connecting rods, which has the following advantages:

[0014] 1. The rough boring fixture for this automotive connecting rod utilizes the self-centering function of the V-shaped clamping block, which can effectively ensure the centering of the connecting rod with only one clamping operation, thereby accurately meeting the strict requirements of geometric tolerances and greatly improving the positional accuracy of connecting rod machining.

[0015] 2. The rough boring fixture for this automotive connecting rod adopts a planar clamping method, providing reliable support below the clamping point. This effectively avoids deformation of the large hole after machining, ensuring that the roundness of the connecting rod meets relevant requirements, thus guaranteeing the stability and reliability of product quality. This is beneficial for the precise assembly and efficient operation of the automotive connecting rod in automotive engine and other systems. Attached Figure Description

[0016] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for describing the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without inventive work.

[0017] Figure 1 This is a front view of the structure of this utility model;

[0018] Figure 2 This is a rear view of the structure of this utility model;

[0019] Figure 3 This is a bottom sectional view of the structure of this utility model;

[0020] Figure 4 This is a schematic diagram of the structure at the first layer of pressure plate.

[0021] In the diagram: 1. Workpiece; 2. V-shaped pressure block; 3. First pressure plate; 4. Second pressure plate; 5. Limiting pressure block; 6. Pressure plate guide post; 7. Gap adjustment pin; 8. Base plate; 9. Support plate; 10. Support platform; 11. Motor; 12. Threaded rod; 13. Connecting plate; 14. Connecting shaft; 15. Limiting plate. Detailed Implementation

[0022] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0023] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; 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; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0024] This utility model provides the following technical solution:

[0025] Combination Figures 1 to 4 A rough boring jig for an automotive connecting rod includes a base plate 8, a support plate 9 fixedly connected to the top of the base plate 8, and a support platform 10 fixedly connected to the top of the support plate 9.

[0026] A motor 11 is fixedly connected to the top of the base plate 8. A threaded rod 12 is fixedly connected to the output end of the motor 11. A connecting plate 13 is provided on the outer wall of the threaded rod 12. A connecting shaft 14 is fixedly connected to the top of the connecting plate 13. A limit plate 15 is fixedly connected to the top of the support platform 10. A first layer pressure plate 3 is fixedly connected to the outer wall of the connecting shaft 14. A V-shaped pressure block 2 is fixedly connected to the inner side of the first layer pressure plate 3. A second layer pressure plate 4 is provided on the top of the first layer pressure plate 3. A limit block 5 is fixedly connected to the bottom of the second layer pressure plate 4. A pressure plate guide post 6 is provided inside the second layer pressure plate 4.

[0027] Furthermore, the second pressure plate 4 is fixedly connected to the outer wall of the connecting shaft 14.

[0028] Furthermore, the second pressure plate 4 is equipped with a gap adjustment tool 7, and the support platform 10 is equipped with a workpiece 1 on top.

[0029] Furthermore, the limiting plate 15 has a sliding hole inside, and the connecting shaft 14 is slidably connected to the inner wall of the sliding hole to stably limit the movement of the connecting shaft 14.

[0030] Furthermore, the support platform 10 has a through hole inside, through which the connecting shaft 14 passes and moves, allowing the connecting shaft 14 to move through the through hole.

[0031] Furthermore, the connecting plate 13 has a threaded hole inside, and the connecting plate 13 is threaded to the outer wall of the threaded rod 12 through the threaded hole, so that the rotational motion of the threaded rod 12 is converted into the linear motion of the connecting plate 13.

[0032] Furthermore, the midpoint of the output end of the motor 11 and the midpoint of the output shaft of the threaded rod 12 are on the same vertical line, ensuring that the motor 11 can stably drive the threaded rod 12 to rotate.

[0033] Considering that the clamp has a self-centering function, the V-shaped pressure block 2 needs to be selected to contact the blank first. The V-shaped pressure block 2 on the clamp is at 45°. When the V-shaped pressure block 2 is pressed down, the 45° inclined surface has a force that makes the workpiece move inward, so the workpiece has a self-centering effect.

[0034] Considering that the V-shaped pressure block 2 cannot bear force in the later stage and only plays a self-centering role in the early stage, it is necessary to calculate the stroke of the V-shaped pressure block 2 and the length of the spring.

[0035] Consider the three support levels below:

[0036] Since the upper and lower planes of the workpiece are not too large, we should select areas with larger areas as possible. After the V-shaped pressure block 2 self-centers the workpiece, the clamping block here will clamp the workpiece for processing in the later stage.

[0037] All four clamping blocks need to be positioned away from the cutting tool to prevent them from affecting the machining of large holes. If there are too many clamping blocks in the fixture, attention should also be paid to chip removal. The relevant pads can be raised to facilitate the removal of iron chips.

[0038] It should be noted that, in this document, relational terms such as first and second, etc., are used only to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "comprises," "comprising," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or device comprising a series of elements includes not only those elements, but also other elements not explicitly listed, or elements inherent to such process, method, article, or device. In the absence of further limitations, an element defined by the phrase "comprising a..." does not exclude the presence of additional identical elements in the process, method, article, or device comprising the element.

Claims

1. A rough boring jig for automotive connecting rods, comprising a base plate (8), characterized in that: Includes a base plate (8), on the top of which a support plate (9) is fixedly connected, and on the top of which a support platform (10) is fixedly connected; A motor (11) is fixedly connected to the top of the base plate (8). A threaded rod (12) is fixedly connected to the output end of the motor (11). A connecting plate (13) is provided on the outer wall of the threaded rod (12). A connecting shaft (14) is fixedly connected to the top of the connecting plate (13). A limiting plate (15) is fixedly connected to the top of the support platform (10). A first pressure plate (3) is fixedly connected to the outer wall of the connecting shaft (14). A V-shaped pressure block (2) is fixedly connected to the inner side of the first pressure plate (3). A second pressure plate (4) is provided on the top of the first pressure plate (3). A limiting pressure block (5) is fixedly connected to the bottom of the second pressure plate (4). A pressure plate guide post (6) is provided inside the second pressure plate (4).

2. The rough boring jig for an automotive connecting rod according to claim 1, characterized in that: The second laminate (4) is fixedly connected to the outer wall of the connecting shaft (14).

3. The rough boring jig for an automotive connecting rod according to claim 1, characterized in that: The second laminate (4) is provided with a gap adjustment stud (7), and the support platform (10) is provided with a workpiece (1) on top.

4. The rough boring jig for an automotive connecting rod according to claim 1, characterized in that: The limiting plate (15) has a sliding hole inside, and the connecting shaft (14) is slidably connected to the inner wall of the sliding hole.

5. The rough boring jig for an automotive connecting rod according to claim 1, characterized in that: The support platform (10) has a through hole inside, and the connecting shaft (14) passes through the through hole and moves.

6. The rough boring jig for an automotive connecting rod according to claim 1, characterized in that: The connecting plate (13) has a threaded hole inside, and the connecting plate (13) is threaded to the outer wall of the threaded rod (12) through the threaded hole.

7. The rough boring jig for an automotive connecting rod according to claim 1, characterized in that: The midpoint of the output end of the motor (11) and the midpoint of the output shaft of the threaded rod (12) are on the same vertical line.

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