Pre-positioning device used before pressing and positioning of large and small hole drilling and boring clamp connecting rod

Abstract

The utility model relates to a pre-positioning device before pressing and positioning of a large and small hole drilling and boring clamp connecting rod, which comprises a fixed bottom plate provided with a large hole site and a small hole site which are arranged at an interval, and a positioning mechanism comprising a driving piece, a first clamping piece and a second clamping piece, the driving part is arranged on the base and is close to the large hole position relative to the small hole position, the first clamping part and the second clamping part are both arranged on the driving part, and the driving part has a first state that the driving part is linked with the first clamping part and the second clamping part is relatively close to the direction of the large hole position; the second state is relatively far away from the direction where the large hole site is located; on one hand, the positioning and clamping efficiency of the straight connecting rod before machining is improved, and the clamping steps of the straight connecting rod are optimized; and on the other hand, the size accuracy of the straight connecting rod in the clamping and machining process is guaranteed, and the situation that the straight connecting rod is damaged or scrapped due to improper clamping and positioning in the machining process is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of straight connecting rod processing, in particular to a pre-positioning device for pressing and positioning connecting rods of a clamp for drilling and boring large and small holes. Background Art

[0002] The connecting rod is one of the main transmission mechanisms of a car engine. It connects the piston and the crankshaft to transmit the expanding gas pressure acting on the top of the piston to the crankshaft, so that the reciprocating linear motion of the piston can be reversibly converted into the rotational motion of the crankshaft, thereby completing the power output.

[0003] During the processing of connecting rods, very strict requirements are placed on dimensional accuracy, and the prerequisite for ensuring the dimensional accuracy of connecting rod processing is the positioning device, because the pre-positioning state of the connecting rod before clamping on the positioning device will directly affect the clamping and positioning state of the connecting rod during subsequent processing, thereby affecting the dimensional accuracy of the connecting rod processing; however, based on the design of the straight connecting rod itself, it is inconvenient to clamp and position it during the processing. Utility Model Content

[0004] The technical problem to be solved by the utility model is to overcome the defect of inconvenient positioning of the straight connecting rod in the prior art during processing, thereby providing a pre-positioning device for the connecting rod of a clamp for drilling and boring large and small holes before pressing and positioning.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] A pre-positioning device for clamping and positioning connecting rods of drilling and boring large and small holes, mainly used for straight connecting rods, comprising:

[0007] Fixed base plate with large and small holes spaced apart.

[0008] The positioning mechanism includes a driving member, a first clamping member and a second clamping member,

[0009] The driving member is fixedly abutted against the fixed base plate and is arranged close to the large hole position relative to the small hole position. The first clamping member and the second clamping member are both arranged on the driving member, and the driving member has a first state in which the first clamping member and the second clamping member are relatively close to the direction of the large hole position, and a second state in which the first clamping member and the second clamping member are relatively far away from the direction of the large hole position.

[0010] Preferably, the center line of the driving member in the horizontal direction is perpendicular to and intersects with the center line of the large hole in the axial direction.

[0011] Preferably, it further comprises at least four positioning posts, which are arranged on the fixed bottom plate around the periphery of the large hole;

[0012] The first clamping member and the second clamping member are located outside the positioning column.

[0013] Preferably, the first clamping member is provided with a first convex portion on a side facing the second clamping member, and the second clamping member is provided with a second convex portion on a side facing the first clamping member.

[0014] In the first state, projections of the first convex portion and the second convex portion in the vertical direction partially overlap with the area surrounded by the positioning column.

[0015] Preferably, the first clamping member, the driving member and the second clamping member form a U-shaped structure.

[0016] Preferably, it further comprises a first base and a second base, wherein the first base and the second base have the same height in the vertical direction;

[0017] The first base is fixedly arranged on the large hole, and the second base is arranged on the small hole.

[0018] Preferably, it also includes an error prevention column, which is arranged on the large hole and fixedly connected to the fixed bottom plate, and the position of the error prevention column corresponds to the convex part on the straight connecting rod;

[0019] A matching opening is provided on the outer side of the first base corresponding to the position of the error-proofing column, and the error-proofing column is located in the matching opening, and the error-proofing column is partially protruded from the upper surface of the first base in the vertical direction.

[0020] Preferably, it further comprises an abutment assembly, wherein the abutment assembly comprises a first abutment member and a second abutment member.

[0021] The first abutment member and the second abutment member are both arranged on the fixed bottom plate.

[0022] The first abutment is located on the side of the first base facing away from the second base, and abuts against the outer side of the large hole end of the straight connecting rod. The second abutment is located on the side of the second base facing away from the first base, and abuts against the outer side of the small hole end of the straight connecting rod.

[0023] Preferably, the first abutment member comprises a fixing column and an adjusting rod, wherein the fixing column is located on a side of the first base facing away from the second base and is fixedly connected to the fixing bottom plate.

[0024] An adjustment opening is provided on one side of the fixing column facing the first base, the adjustment rod is movably connected to the adjustment opening, and the adjustment rod can move closer to or farther from the fixing column toward the first base in a horizontal direction.

[0025] Preferably, the second abutment member comprises a V-shaped abutment member, and a V-shaped opening of the V-shaped abutment member is arranged toward the small hole.

[0026] Compared with the prior art, the beneficial effects of the present invention are:

[0027] The above technical solution provides a pre-positioning device for the connecting rod of the drilling and boring fixture for pressing and positioning. A large hole position and a small hole position for placing a straight connecting rod are arranged at intervals on a fixed base plate, and a driving member is arranged close to the large hole position relative to the small hole position, and a first clamping frame and a second clamping frame are arranged on the driving member, so that the driving member has a first state in which the first clamping member and the second clamping member are linked to each other and are relatively close to the large hole position to pre-position the straight connecting rod to be processed, and a second state in which the driving member is relatively far away from the direction of the large hole position to loosen the straight connecting rod that has been processed. On the one hand, the efficiency of positioning and clamping of the straight connecting rod before processing is improved, and the clamping steps of the straight connecting rod are optimized; on the other hand, the dimensional accuracy of the straight connecting rod during the clamping process is guaranteed, and the damage or scrapping of the straight connecting rod caused by improper clamping and positioning during the processing is reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0029] Figure 1 A schematic structural diagram of a pre-positioning device provided in one embodiment of the utility model.

[0030] Figure 2 for Figure 1 Another structural schematic diagram of the pre-positioning device shown.

[0031] Figure 3 for Figure 2 An enlarged schematic diagram of the structure at location A of the pre-positioning device is shown.

[0032] Description of reference numerals:

[0033] 1. Fixed bottom plate; 11. Large hole; 12. Small hole; 2. Anti-error column; 3. First base; 31. Matching opening; 32. Second base; 4. Positioning column; 41. First clamping member; 411. First convex portion; 42. Second clamping member; 421. Second convex portion; 43. Driving member; 431. Parallel claw; 51. Fixed column; 52. Adjusting rod; 53. V-shaped abutment member; 54. Abutment column. DETAILED DESCRIPTION

[0034] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0035] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0036] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0037] The utility model provides a pre-positioning device for clamping and positioning connecting rods of drilling and boring large and small holes, which is mainly used for pre-positioning of straight connecting rods. Figure 1 and Figure 2As shown, it includes: a fixed base plate 1, which is used to install a clamp assembly for positioning the straight connecting rod; and there are large holes 11 and small holes 12 arranged at intervals on the fixed base plate 1; wherein the large hole 11 is used to clamp and fix the large hole end of the straight connecting rod, and the small hole 12 is used to clamp and fix the small hole end of the straight connecting rod; a positioning mechanism, which is used to pre-position the clamped straight connecting rod; and the positioning mechanism includes a first clamping member 41, a second clamping member 42 and a driving member 43; wherein the driving member 43 is arranged on the fixed base plate 1, and is arranged at a position close to the large hole 11 relative to the small hole 12, and the first clamping member 41 and the second clamping member 42 are respectively located The left and right sides of the first base 3 in the horizontal direction; specifically, the driving member 43 is provided with two parallel claws 431 on the side facing the large hole 11, and the first clamping member 41 and the second clamping member 42 are fixedly connected to the two parallel claws 431 respectively; and the driving member 43 has a first state in which the first clamping member 41 and the second clamping member 42 are linked by the two parallel claws 431 to synchronously approach the direction of the large hole 11 to pre-position the straight connecting rod to be processed, and a second state in which the first clamping member 41 and the second clamping member 42 are linked to synchronously move away from the direction of the large hole 11 to loosen the straight connecting rod after processing.

[0038] A large hole 11 and a small hole 12 for placing a straight-connecting rod are arranged at intervals on the fixed base plate 1, the driving member 43 is arranged close to the large hole 11 relative to the small hole 12, and the first clamping frame and the second clamping frame are arranged on the driving member 43, so that the driving member 43 has a first state in which the first clamping member 41 and the second clamping member 42 are linked to be relatively close to the large hole 11 to pre-position the straight-connecting rod to be processed, and a second state in which the driving member 43 is relatively far away from the direction of the large hole 11 to loosen the straight-connecting rod to be processed; on the one hand, the efficiency of positioning and clamping of the straight-connecting rod before processing is improved, and the clamping steps of the straight-connecting rod are optimized; on the other hand, the dimensional accuracy of the straight-connecting rod during the clamping process is guaranteed, and the damage or scrapping of the straight-connecting rod caused by improper clamping and positioning during the processing is reduced.

[0039] Specifically, in order to ensure the accuracy of the positioning mechanism during the pre-positioning process, the driving member 43 is arranged on the fixed base plate 1, so that the center line of the driving member 43 in the horizontal direction is perpendicular to and intersects with the center line of the large hole 11 in the axial direction, thereby avoiding the driving member 43 from linking the first clamping member 41 and the second clamping member 42 to pre-position the straight connecting rod. Preferably, the driving member 43 is a parallel cylinder.

[0040] In order to achieve rapid positioning, the positioning mechanism also includes at least four positioning columns 4, and the four positioning columns 4 are arranged on the fixed base plate 1 around the outer periphery of the large hole 11, and the first clamping member 41 and the second clamping member 42 are located outside the area enclosed by the four positioning columns 4; further, the four positioning columns 4 are movably connected to the fixed base plate 1, that is, the four positioning columns 4 can all move synchronously toward or away from the position of the large hole 11; then, when the sizes of the clamped straight connecting rods are different, the four positioning columns 4 can be adjusted according to the diameter of the large hole end of the clamped straight connecting rods, so as to adapt to the large hole end of the clamped straight connecting rods.

[0041] like Figure 3 As shown, in order to facilitate the adaptation and combination of the first clamping member 41, the second clamping member 42 and the four positioning columns 4, a first protrusion 411 is provided on the side of the first clamping member 41 facing the second clamping member 42, and a second protrusion 421 is provided on the side of the second clamping member 42 facing the first clamping member 41; and, in the first state, the projections of the first protrusion 411 and the second protrusion 421 in the vertical direction partially overlap with the area enclosed by the positioning columns 4; when the straight connecting rod is processed, the large hole end of the straight connecting rod is clamped and fixed on the large hole position 11, and the four positioning columns 4 are surrounded by the outer periphery of the large hole end of the straight connecting rod, and the first protrusion 411 on the first clamping member 41 and the second protrusion 421 on the second clamping member 42 are in contact with the outer side of the large hole end of the straight connecting rod.

[0042] In addition, in order to further improve the pre-positioning effect on both sides of the large hole end of the straight connecting rod, the first clamping member 41, the driving member 43 and the second clamping member 42 form a U-shaped structure; then, during positioning, the large hole end of the straight connecting rod can be directly placed in the formed U-shaped structure, further optimizing the pre-positioning step and improving the positioning efficiency.

[0043] In order to facilitate the rapid positioning and clamping of the straight-connecting rod, the pre-positioning device also includes a first base 3 and a second base 32; in order to ensure that the straight-connecting rod is more stable during clamping, the first base 3 and the second base 32 are at the same height in the vertical direction; specifically, the first base 3 is fixedly arranged on the large hole position 11, and the second base 32 is arranged on the small hole position 12.

[0044] Due to the structural characteristics of the straight connecting rod itself, the contours of its two end faces are roughly the same, and the only difference is that the front side is provided with a convex portion at the large hole end, while the back side is not. This makes it very easy to reverse the installation when clamping before processing, resulting in a large size deviation of the processed straight connecting rod, and in severe cases, the straight connecting rod may be damaged and scrapped.

[0045] Based on this, the predetermined device also includes an anti-error column 2, which is used to distinguish the positive and negative end faces of the straight-connecting rod; the anti-error column 2 is arranged on the large hole position 11 and is fixedly connected to the fixed base plate 1, and the position of the anti-error column 2 corresponds to the convex portion on the straight-connecting rod; when the straight-connecting rod is in the clamping process, if the anti-error column 2 abuts against the convex portion on the straight-connecting rod, the straight-connecting rod will be clamped unsteadily with the fixture, indicating that the straight-connecting rod is reversely installed; if the anti-error column 2 does not abut against the convex portion on the straight-connecting rod, the straight-connecting rod will be in a stable clamping state with the fixture, indicating that the straight-connecting rod is clamped correctly.

[0046] In order to facilitate the adaptation of the anti-error column 2 to the first base 3, a matching opening 31 is provided on the outer side of the first base 3 corresponding to the position of the anti-error column 2. Then, when the first base 3 is fixedly set on the large hole 11, the anti-error column 2 is located in the matching opening 31; further, in order to prevent the first base 3 from interfering with the anti-error column 2, the anti-error column 2 is partially protruded from the upper surface of the first base 3 in the vertical direction; to ensure that when the straight connecting rod is reversed, the anti-error column 2 can contact the convex part on the straight connecting rod.

[0047] Furthermore, in order to achieve the front and rear positioning of the straight-connecting rod in the horizontal direction, the pre-positioning device also includes an abutment assembly, which includes a first abutment member 5 and a second abutment member, and the first abutment member 5 and the second abutment member are both arranged on the fixed base plate 1; wherein the first abutment member 5 is located on the side of the first base 3 facing away from the second base 32, and abuts against the outer side of the large hole end of the straight-connecting rod, and the second abutment member is located on the side of the second base 32 facing away from the first base 3, and abuts against the outer side of the small hole end of the straight-connecting rod, thereby achieving the front and rear positioning of the clamped straight-connecting rod in the horizontal direction.

[0048] In addition, in order to facilitate the adjustment of the tightness of the positioning on the front and rear sides in the horizontal direction, the first abutment member 5 includes a fixed column 51 and an adjusting rod 52, and the fixed column 51 is located on the side of the first base 3 facing away from the second base 32, and is fixedly connected to the fixed bottom plate 1; specifically, the fixed column 51 is provided with an adjusting port on the side facing the first base 3, and then the adjusting rod 52 is movably connected to the adjusting port, and the adjusting rod 52 can move closer to or farther away from the fixed column 51 in the horizontal direction toward the first base 3.

[0049] Specifically, the staff can adjust the adjusting rod 52 so that the adjusting rod 52 moves away from the fixed column 51 in the horizontal direction toward the first base 3, thereby placing the straight-connecting rod on the first base 3 and the second base 32 accordingly, so that the outer side of the small hole end of the straight-connecting rod is positioned and abutted with the second abutment; after the clamping and placement is completed, adjust the adjusting rod 52 again so that the adjusting rod 52 moves closer to the first base 3 in the horizontal direction relative to the fixed column 51, so that the end of the adjusting rod 52 facing away from the fixed column 51 is positioned and abutted with the outer side of the large hole end of the straight-connecting rod, thereby completing the pre-positioning clamping of the straight-connecting rod.

[0050] Furthermore, in order to improve the positioning effect of the small hole end of the straight-connecting rod, the second abutment member includes a V-shaped abutment member 53, and the V-shaped mouth of the V-shaped abutment member 53 is arranged toward the small hole position 12; when the straight-connecting rod is clamped, the outer side of the small hole end of the straight-connecting rod abuts in the V-shaped mouth of the V-shaped abutment member 53; and, in order to better support the straight-connecting rod during the clamping process, the second abutment member also includes an abutment column 54, the abutment column 54 is arranged on the small hole position 12, and the projection of the abutment column 54 in the vertical direction is located in the V-shaped mouth of the V-shaped abutment member 53, and then when the straight-connecting rod is clamped, the abutment column 54 abuts against the edge of the straight-connecting rod at one end facing the fixed base plate 1.

[0051] In addition, one or more sets of large holes 11 , small holes 12 , and components disposed on the large holes 11 or the small holes 12 can be disposed on the fixed base plate 1 based on actual processing requirements.

[0052] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A pre-positioning device for clamping and positioning connecting rods of drilling and boring large and small holes, mainly used for straight connecting rods, characterized in that: include: Fixed base plate with large and small holes spaced apart. The positioning mechanism includes a driving member, a first clamping member and a second clamping member, The driving member is fixedly abutted against the fixed base plate and is arranged close to the large hole position relative to the small hole position. The first clamping member and the second clamping member are both arranged on the driving member, and the driving member has a first state in which the first clamping member and the second clamping member are relatively close to the direction of the large hole position, and a second state in which the first clamping member and the second clamping member are relatively far away from the direction of the large hole position.

2. The pre-positioning device according to claim 1, characterized in that: The center line of the driving member in the horizontal direction is perpendicular to and intersects with the center line of the large hole in the axial direction.

3. The pre-positioning device according to claim 1, characterized in that: It also includes at least four positioning posts, which are arranged on the fixed bottom plate around the periphery of the large hole; The first clamping member and the second clamping member are located outside the positioning column.

4. The pre-positioning device according to claim 3, characterized in that: The first clamping member is provided with a first convex portion on a side facing the second clamping member, and the second clamping member is provided with a second convex portion on a side facing the first clamping member. In the first state, projections of the first convex portion and the second convex portion in the vertical direction partially overlap with the area surrounded by the positioning column.

5. The pre-positioning device according to claim 1, characterized in that: The first clamping member, the driving member and the second clamping member form a U-shaped structure.

6. The pre-positioning device according to claim 1, characterized in that: Also includes a first base and a second base, wherein the first base and the second base have the same height in the vertical direction; The first base is fixedly arranged on the large hole, and the second base is arranged on the small hole.

7. The pre-positioning device according to claim 6, characterized in that: It also includes an error prevention column, which is arranged on the large hole and fixedly connected to the fixed bottom plate, and the position of the error prevention column corresponds to the convex part on the straight connecting rod; A matching opening is provided on the outer side of the first base corresponding to the position of the error-proofing column, and the error-proofing column is located in the matching opening, and the error-proofing column is partially protruded from the upper surface of the first base in the vertical direction.

8. The pre-positioning device according to claim 6, characterized in that: Also included is an abutment assembly, the abutment assembly comprising a first abutment member and a second abutment member, The first abutment member and the second abutment member are both arranged on the fixed bottom plate. The first abutment is located on the side of the first base facing away from the second base, and abuts against the outer side of the large hole end of the straight connecting rod. The second abutment is located on the side of the second base facing away from the first base, and abuts against the outer side of the small hole end of the straight connecting rod.

9. The pre-positioning device according to claim 8, characterized in that: The first abutment member includes a fixed column and an adjustment rod, wherein the fixed column is located on a side of the first base facing away from the second base and is fixedly connected to the fixed bottom plate. An adjustment opening is provided on one side of the fixing column facing the first base, the adjustment rod is movably connected to the adjustment opening, and the adjustment rod can move closer to or farther from the fixing column toward the first base in a horizontal direction.

10. The pre-positioning device according to claim 8, characterized in that: The second abutment member comprises a V-shaped abutment member, and a V-shaped opening of the V-shaped abutment member is arranged toward the small hole.

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