CN213257230U

CN213257230U - Connecting rod drilling machining clamp

Info

Publication number: CN213257230U
Application number: CN202021832941.9U
Authority: CN
Inventors: 刘霞; 闫化锦; 李江; 沈军杰
Original assignee: Guizhou University of Engineering Science
Current assignee: Guizhou University of Engineering Science
Priority date: 2020-08-28
Filing date: 2020-08-28
Publication date: 2021-05-25
Anticipated expiration: 2030-08-28

Abstract

The utility model discloses a connecting rod drilling adds clamping apparatus, including the anchor clamps body, location mandrel, fixture and drill bushing mechanism, wherein, the location mandrel includes first location portion and second location portion, and fixture includes V-arrangement piece support, V-arrangement piece support and activity push rod, and drill bushing mechanism includes bushing plate and bushing plate, under the operating condition, the activity push rod promotes the activity V-arrangement piece is in remove in the through-hole to the three hole connecting rod clamps that will treat processing are arranged in second location portion with between the activity V-arrangement piece, so that follow the quick change drill bushing processes the aperture of three hole connecting rods downwards. The fixture realizes accurate positioning and quick installation of the connecting rod, and can effectively improve the processing efficiency.

Description

Connecting rod drilling machining clamp

Technical Field

The utility model relates to a connecting rod drilling adds clamping apparatus belongs to three connecting rod drilling technical field.

Background

A three-hole connecting rod is a very widely used component in automotive engines. The three-hole connecting rod consists of three round holes, three groups of cylindrical hole end planes and a rod body with a groove of the connecting rod. When the crankshaft is in work, the big head hole and the ear hole are connected with the piston and do reciprocating motion, and the small head hole is connected with the crankshaft and do rotary motion.

The irregular shape of the connecting rod brings great difficulty to the forging of the connecting rod blank, and the connecting rod mainly pursues a development direction which can meet the use requirement and needs to be short in the prior art. The die forging process is also a method for manufacturing the connecting rod adopted at present abroad, the subsequent treatment such as processing and the like can be conveniently carried out on machine tool equipment after die forging manufacturing, the die forging connecting rod can be used for carrying out mass production on an automatic die forging line, blank bars are inductively heated to the die forging temperature, then blank manufacturing, pre-forging, rough forging and finish forging are carried out on a die forging machine, and each forming process is completed by conveying the blank bars through a stepping conveyor.

The mechanical processing process of the three-hole connecting rod is a processing production process, in the process, the appearance style, the size and the like of a processed part can be changed, and finally the processed part is changed into a corresponding semi-finished product or a qualified finished product, which has a very important position in the processing production process. Because the precision requirement of three holes is higher and the three holes have position requirements, how to design the machining clamp of the three-hole connecting rod to improve the precision and the machining speed is a problem to be solved.

SUMMERY OF THE UTILITY MODEL

Based on the above, the utility model provides a connecting rod drilling adds clamping apparatus to precision and efficiency problem in the solution connecting rod drilling processing.

The technical scheme of the utility model is that: a connecting rod boring jig, wherein the jig comprises:

the fixture body is provided with a positioning hole;

a positioning mandrel comprising:

the first positioning part is arranged in the positioning hole in a matched mode;

the second positioning part is connected with the first positioning part and is suitable for being matched with the large hole of the three-hole connecting rod for positioning;

fixture includes:

the V-shaped block support is arranged on the clamp body and is provided with a through hole which is transversely arranged;

the movable V-shaped block is movably arranged in the through hole;

the movable push rod can push the movable V-shaped block to move;

drill bushing mechanism, comprising:

the drilling template is arranged on the V-shaped block support, and is provided with a mounting hole;

the quick-change drill bushing is arranged in the mounting hole;

under the working state, the movable push rod pushes the movable V-shaped block to move in the through hole, and the three-hole connecting rod to be machined is clamped between the second positioning part and the movable V-shaped block, so that the small hole of the three-hole connecting rod is machined downwards from the quick-change drill bushing.

In one example, the positioning spindle further has a support portion disposed between the first positioning portion and the second positioning portion, the support portion being adapted to support a large bore end face of a three-hole link.

In one example, the positioning mandrel further includes a rod portion disposed on the second positioning portion, and the rod portion and the first positioning portion are respectively located on two sides of the second positioning portion;

and the rod part is provided with an opening gasket and a clamping nut so as to fix the three-hole connecting rod on the second positioning part.

In one example, the movable V-shaped block is provided with a V-shaped clamping opening which is matched with the excircle of the small hole to be processed on the three-hole connecting rod.

In one example, the clamping mechanism further comprises:

the push rod support is arranged on the clamp body, and a threaded hole is formed in the push rod support;

the movable push rod is provided with an external thread, and the movable push rod is matched with the threaded hole through the external thread.

In one example, a pushing opening is arranged on the movable V-shaped block, and the size of an inner hole of the pushing opening is larger than the opening size of the pushing opening;

the end part of the movable push rod is provided with a lug, the lug is movably arranged in an inner hole of the push opening, and the opening size is smaller than that of the lug so as to prevent the lug from being separated from the push opening in the horizontal direction.

In one example, a fixing bushing is arranged in a mounting hole in the drill plate, and the quick-change drill bushing is arranged in the fixing bushing.

In one example, the drill bushing mechanism further comprises a fastening screw, and the fastening screw is arranged on the drill plate and close to the mounting hole;

a notch is formed in the side face of the quick-change drill bushing from top to bottom, a fixing plate is formed on one side of the notch, and the upper end face of the fixing plate is lower than the upper end face of the quick-change drill bushing;

the drill bushing mechanism comprises a first state and a second state, the fixing plate rotates to the lower portion of a nut of the fastening screw in the first state, the quick-change drill bushing is fixed on the drill plate through the fastening screw, and the notch rotates to a position corresponding to the fastening screw in the second state so that the quick-change drill bushing can be taken out.

In one example, the fixture body is further provided with an auxiliary support member, and the auxiliary support member is used for supporting the bottom surface of the small hole to be processed on the three-hole connecting rod.

In one example, the fixture body is provided with a first blanking hole, and the auxiliary support member is provided with a second blanking hole aligned with the first blanking hole so as to at least partially discharge waste materials when small holes are machined.

The utility model has the advantages that: the clamp takes the large hole of the connecting rod as a positioning reference, the positioning hole is arranged on the clamp body, the positioning mandrel needs to be provided with the first positioning part and the second positioning part, the first positioning part is arranged in the positioning hole in a matched mode, the second positioning part is positioned in a matched mode with the large hole in the connecting rod, the small hole end of the connecting rod is clamped by the clamping mechanism consisting of the V-shaped block support, the movable V-shaped block and the movable push rod, and finally the small hole of the three-hole connecting rod can be processed downwards from the position of the quick-change drill bushing.

In addition, according to the drill bushing mechanism adopted by the invention, as the notch is formed on the side surface of the quick-change drill bushing from top to bottom, the fixing plate is formed on one side of the notch, and the upper end surface of the fixing plate is lower than that of the quick-change drill bushing, the quick change can be realized by rotating the quick-change drill bushing, the fastening screw does not need to be taken down, and the working efficiency can be improved to a certain extent.

Drawings

FIG. 1 is a plan view of a connecting rod boring fixture;

FIG. 2 is a sectional view taken along line A-A in FIG. 1;

FIG. 3 is a view showing the construction of the clamp body;

FIG. 4 is a block diagram of a positioning mandrel;

FIG. 5 is a front view of the V block stand;

FIG. 6 is a top view of the V block stand;

FIG. 7 is a side view of the V block stand;

FIG. 8 is a front view of the movable push rod;

FIG. 9 is a top view of the movable push rod;

FIG. 10 is a schematic view of the construction of the pusher shoe;

FIG. 11 is a schematic view of the structure of the movable V-block;

FIG. 12 is a schematic structural view of a quick-change drill bushing and a fastening screw;

FIG. 13 is a longitudinal cross-sectional view of the quick-change drill sleeve;

FIG. 14 is a drawing of an unfinished connecting rod blank;

FIG. 15 is a detail view of a machined connecting rod;

description of reference numerals:

10 clamp body

11, positioning holes and 12 first blanking holes;

20 positioning mandrel

21 a first positioning part, 22 a supporting part, 23 a second positioning part, 24 a rod part, 25 an open washer and 26 a clamping nut;

30 clamping mechanism

31V-shaped block support, 32 movable V-shaped block, 33 movable push rod, 34 push rod support, 35 auxiliary support,

311 of a through-hole, and a via hole,

321V-shaped clamping opening, 322 pushing opening,

the combination of the projection 331, the handle 332,

341 threaded holes;

351 a second blanking hole;

40 drill bushing mechanism

41 a drilling template, 42 a fixed bushing, 43 a quick-change drill bushing, 44 a fastening screw,

431 notch, 432 fixing the plate.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only and do not represent the only embodiments.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Referring to fig. 1 to 15, a connecting rod drilling jig according to an embodiment of the present invention includes a jig body 10, a positioning mandrel 20, a clamping mechanism 30, and a drill bushing mechanism 40.

The fixture body 10 is mainly used for supporting parts such as the positioning mandrel 20, the clamping mechanism 30, the drill bushing mechanism 40 and the like. A vertical positioning hole 11 is arranged on one side of the clamp body 10.

The positioning mandrel 20 is mainly used for positioning and fixing the large hole of the connecting rod. The positioning mandrel 20 comprises a first positioning portion 21, a supporting portion 22, a second positioning portion 23 and a rod portion 24, wherein the first positioning portion 21 and the second positioning portion 23 are respectively located on two sides of the supporting portion 22, the supporting portion 22 and the rod portion 24 are respectively located on two sides of the second positioning portion 23, the first positioning portion 21 is matched with the positioning hole 11, the second positioning portion 23 is matched with a large hole of the connecting rod, and the supporting portion 22 serves as a large hole end face of the connecting rod. The rod part 24 is provided with external threads, and is also provided with an open washer 25 and a clamping nut 26, and after the large hole of the connecting rod is sleeved outside the second positioning part 23, the large hole end of the connecting rod can be fixed on the second positioning part 23 through the open washer 25 and the clamping nut 26.

The clamping mechanism 30 is mainly used for clamping the small hole end of the fixed connecting rod. The clamp comprises a V-shaped block support 31, a movable V-shaped block 32, a movable push rod 33 and a push rod support 34, wherein the V-shaped block support 31 is fixedly arranged on the clamp body 10, and the V-shaped block support 31 is provided with a through hole 311 which is transversely arranged; the movable V-shaped block 32 is movably arranged in the through hole 311, the movable V-shaped block 32 is provided with a V-shaped clamping opening 321, and the V-shaped clamping opening 321 is matched with the excircle of the small hole to be processed on the three-hole connecting rod; the movable push rod 33 can push the movable V-shaped block 32 to move, and the outer end of the movable push rod 33 is provided with a handle 332 for convenient operation; the push rod support 34 is fixedly arranged on the clamp body 10, the push rod support 34 is provided with a threaded hole 341, a corresponding movable push rod 33 is provided with a matched external thread, and the movable push rod 33 is matched with the threaded hole 341 through the external thread, so that the movable V-shaped block 32 is rotationally pushed to move.

Preferably, a pushing opening 322 is arranged on the movable V-shaped block 32, and the size of the inner hole of the pushing opening 322 is larger than the opening size of the pushing opening 322; a projection 331 is provided at an end of the movable push rod 33, the projection 331 is movably disposed in the inner hole of the push port 322, and the opening size is smaller than that of the projection 331 so as to block the projection 331 from being separated from the push port 322 in a horizontal direction. During operation, the movable push rod 33 can push the movable V-block 32 to reciprocate through the protrusion 331.

The drill bushing mechanism 40 is used for drilling holes for machining small holes of the connecting rod. Comprising a drilling template 41, a fixing bushing 42 and a quick-change drill bushing 43. The drilling template 41 is in a plate shape and is fixedly arranged on the V-shaped block support 31, and the drilling template 41 is provided with a mounting hole which is opposite to the position of the small hole to be processed of the connecting rod; a fixing bush 42 is mounted in the mounting hole and a quick-change drill bushing 43 is mounted in the fixing bush 42.

Preferably, the drill bushing mechanism 40 further includes a fastening screw 44, the fastening screw 44 is disposed on the drill plate 41 and close to the mounting hole, and a screw hole is formed on the drill plate 41, and the fastening screw 44 is inserted into the screw hole. A notch 431 is formed on part of the side surface of the quick-change drill bushing 43 from top to bottom, a fixing plate 432 is formed on one side of the notch 431, and the upper end surface of the fixing plate 432 is lower than the upper end surface of the quick-change drill bushing 43. The drill bushing mechanism 40 thus includes a first state in which the fixing plate 432 is rotated to the lower portion of the fastening screw 44, and the quick-change drill bushing 43 is fixed to the drill plate 41 by the fastening screw 44, and a second state in which the notch 431 is rotated to a position corresponding to the fastening screw 44, so that the quick-change drill bushing 43 can be quickly taken out, thereby improving the working efficiency.

In the clamp, an auxiliary support member 35 is arranged on the clamp body 10, and the auxiliary support member 35 is used for supporting the bottom surface of a small hole to be processed on the three-hole connecting rod so as to enable the three-hole connecting rod to be in a horizontal state during processing. Preferably, a first blanking hole 12 is provided on the jig body 10, and a second blanking hole 351 is provided on the auxiliary support 35, the second blanking hole 351 being aligned with the first blanking hole 12 so as to at least partially discharge the scraps when the small hole is processed.

The operation method of the connecting rod drilling clamp comprises the following steps: firstly, placing the first positioning part 21 of the positioning mandrel 20 in the positioning hole 11 of the fixture body 10, then sleeving the large hole of the connecting rod on the second positioning part 23 of the positioning mandrel 20 in a penetrating manner, and fixing the large hole end of the connecting rod on the second positioning part 23 through the opening washer 25 and the clamping nut 26; with the help of the clamping mechanism 30 consisting of the V-shaped block support 31, the movable V-shaped block 32 and the movable push rod 33, the movable V-shaped block 32 clamps the small hole end of the connecting rod, and finally, the small hole of the three-hole connecting rod can be processed downwards from the position of the quick change drill bushing 43.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the present invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A connecting rod boring jig, wherein the jig comprises:

the fixture body (10) is provided with a positioning hole (11);

characterized in that, anchor clamps still include:

positioning spindle (20) comprising:

the first positioning part (21), the first positioning part (21) is arranged in the positioning hole (11) in a matching way;

the second positioning part (23) is connected with the first positioning part (21), and the second positioning part (23) is suitable for being matched with and positioned in a large hole of the three-hole connecting rod;

a clamping mechanism (30) comprising:

the V-shaped block support (31) is arranged on the clamp body (10), and a through hole (311) arranged transversely is formed in the V-shaped block support (31);

the movable V-shaped block (32) is movably arranged in the through hole (311);

the movable push rod (33), the movable push rod (33) can push the movable V-shaped block (32) to move;

a drill bushing mechanism (40) comprising:

the drilling template (41) is arranged on the V-shaped block support (31), and a mounting hole is formed in the drilling template (41);

the quick-change drill bushing (43) is arranged in the mounting hole;

in a working state, the movable push rod (33) pushes the movable V-shaped block (32) to move in the through hole (311), and a three-hole connecting rod to be machined is clamped between the second positioning part (23) and the movable V-shaped block (32), so that a small hole of the three-hole connecting rod is machined downwards from the quick-change drill bushing (43).

2. The connecting rod drilling machining jig according to claim 1, characterized in that the positioning spindle (20) further has a support portion (22), the support portion (22) being provided between the first positioning portion (21) and the second positioning portion (23), the support portion (22) being adapted to support a large bore end face of a three-hole connecting rod.

3. The connecting rod boring jig of claim 2,

the positioning mandrel (20) is further provided with a rod part (24), the rod part (24) is arranged on the second positioning part (23), and the rod part (24) and the first positioning part (21) are respectively positioned at two sides of the second positioning part (23);

the rod part (24) is provided with an open washer (25) and a clamping nut (26) so as to fix the three-hole connecting rod on the second positioning part (23).

4. Connecting rod boring machining fixture according to claim 1, characterized in that the movable V-block (32) has a V-shaped clamping mouth (321), the V-shaped clamping mouth (321) matching the outer circle of the small hole to be machined on the three-hole connecting rod.

5. The connecting rod boring jig of claim 1, wherein the clamping mechanism (30) further comprises:

the push rod support (34) is arranged on the clamp body (10), and a threaded hole (341) is formed in the push rod support (34);

the movable push rod (33) is provided with an external thread, and the movable push rod (33) is matched with the threaded hole (341) through the external thread.

6. The connecting rod boring jig of claim 1,

a pushing opening (322) is formed in the movable V-shaped block (32), and the size of an inner hole of the pushing opening (322) is larger than the size of an opening of the pushing opening (322);

the end part of the movable push rod (33) is provided with a lug (331), the lug (331) is movably arranged in an inner hole of the push port (322), and the opening size is smaller than that of the lug (331) so as to block the lug (331) from being separated from the push port (322) in the horizontal direction.

7. Connecting rod boring machining fixture according to claim 1, characterized in that a fixing bushing (42) is provided in the mounting hole in the drilling template (41), the quick-change drill bushing (43) being provided in the fixing bushing (42).

8. The connecting rod boring jig of claim 7,

the drill bushing mechanism (40) further comprises a fastening screw (44), and the fastening screw (44) is arranged on the drill plate (41) and close to the mounting hole;

a notch (431) is formed in the side surface of the quick-change drill bushing (43) from top to bottom, a fixing plate (432) is formed on one side of the notch (431), and the upper end face of the fixing plate (432) is lower than that of the quick-change drill bushing (43);

wherein the drill bushing mechanism (40) comprises a first state and a second state, the fixing plate (432) is rotated to the lower part of the nut of the fastening screw (44) in the first state, the quick-change drill bushing (43) is fixed on the drill plate (41) by the fastening screw (44), and the notch (431) is rotated to the position corresponding to the fastening screw (44) in the second state, so that the quick-change drill bushing (43) can be taken out.

9. The connecting rod drilling clamp according to claim 1, wherein an auxiliary support member (35) is further provided on the clamp body (10), and the auxiliary support member (35) is used for supporting the bottom surface of the small hole to be machined on the three-hole connecting rod.

10. Connecting rod drilling machining fixture according to claim 9, characterized in that a first blanking hole (12) is provided on the fixture body (10), and a second blanking hole (351) is provided on the auxiliary support (35), the second blanking hole (351) being aligned with the first blanking hole (12) for at least partially discharging waste material when machining small holes.