CN115041987A

CN115041987A - Connecting rod body faying face adds clamping apparatus

Info

Publication number: CN115041987A
Application number: CN202210719868.1A
Authority: CN
Inventors: 黄鹏程; 朱大昌; 吴龙飞; 秦广向; 徐汉斌
Original assignee: Guangzhou University
Current assignee: Guangzhou University
Priority date: 2022-06-23
Filing date: 2022-06-23
Publication date: 2022-09-13

Abstract

The invention relates to the technical field of machining equipment, in particular to a connecting rod body joint surface machining clamp. The clamping device comprises a base plane, be equipped with the anchor clamps body and cylinder on the base plane, the cylinder is fixed in anchor clamps body one side, the anchor clamps body is kept away from one side of cylinder is established to the working face, the direction of motion of the piston rod of cylinder with the working face is parallel, the piston rod passes through lever assembly and connects the clamping piece, the clamping piece is located on the working face, on the working face with one side that the clamping piece is relative is equipped with the locating piece, the clamping piece with the locating piece all is used for the big head base end of fixed connecting rod body, the working face lower part is equipped with fixedly the reference column of connecting rod body connecting rod microcephaly. By adopting the lever assembly, the required cylinder thrust is reduced under the same clamping force, and the production cost is reduced; meanwhile, the connecting rod body can be accurately positioned, and the clamping reliability of the connecting rod body is further improved.

Description

Connecting rod body faying face adds clamping apparatus

Technical Field

The invention relates to the technical field of machining equipment, in particular to a connecting rod body joint surface machining clamp.

Background

The connecting rod of the engine is an important transmission part, the connecting rod transmits expansion pressure acting on the top surface of the piston to the crankshaft, and the crankshaft drives the piston to compress gas in the cylinder, so that the requirement on the machining precision of the connecting rod is high. The connecting rod comprises a small connecting rod head, a rod body and a large connecting rod head. The small end of the connecting rod is used for installing a piston pin to connect the piston, the rod body is usually made into an I-shaped or H-shaped section to reduce the mass on the premise of meeting the requirements on strength and rigidity, the large end of the connecting rod is connected with a connecting rod journal of a crankshaft, the large end of the connecting rod is separated, the part cut with the rod body is called a connecting rod cover, the part connected with the rod body is called a large end base end, and the connecting rod cover and the large end base end are connected into a whole through a connecting rod bolt. Therefore, the machining precision of the joint surface of the connecting rod and the connecting rod cap needs to be ensured during machining.

At present, the milling processing of the joint surface of the connecting rod body is usually performed manually by clamping the connecting rod body through a clamp and pressing the connecting rod body with a pressing plate, then the milling cutter mills the joint surface, and the pressing plate is fastened manually by a worker through a bolt or a connecting buckle. The clamping mode has the problems of inaccurate fixing and positioning, low machining precision, low working efficiency and the like.

Disclosure of Invention

The invention aims to provide a connecting rod body joint surface machining clamp which can accurately position a connecting rod body, and meanwhile, a lever assembly is adopted, so that the required cylinder thrust is reduced under the same clamping force, and the production cost is reduced.

The invention provides a connecting rod body joint surface processing clamp which comprises a base surface, wherein a clamp body and an air cylinder are arranged on the base surface, the air cylinder is fixed on one side of the clamp body, one side, far away from the air cylinder, of the clamp body is set as a working surface, the moving direction of a piston rod of the air cylinder is parallel to the working surface, the piston rod is connected with the clamping piece through a lever assembly, the clamping piece is positioned on the working surface, the piston rod drives the clamping piece to horizontally move along the working surface through the lever assembly, a positioning block is arranged on one side, opposite to the clamping piece, of the working surface, the clamping piece and the positioning block are used for fixing the large-end base end of a connecting rod body, and a positioning column for fixing the small end of the connecting rod body is arranged on the lower portion of the working surface.

Preferably, the lever assembly comprises a support and a pressing plate, the support is fixedly arranged on one side, adjacent to the working face, of the clamp body, the pressing plate is sequentially connected with the piston rod, the support and the clamping piece, the pressing plate is rotatably connected with the piston rod through a connecting rod, and the pressing plate is rotatably connected with the support and the pressing plate is rotatably connected with the clamping piece.

Preferably, the distance between the bearing and the piston rod is greater than the distance between the bearing and the clamping member.

Preferably, the pressing plate is connected with the clamping piece through a push rod, the pressing plate is rotatably connected with one end of the push rod, and the other end of the push rod is rotatably connected with the clamping piece.

Preferably, a slide rail is arranged on the working surface along the horizontal direction, and the clamping piece can move along the slide rail.

Preferably, the upper side and the lower side of the clamping piece are respectively provided with a stop block for guiding the clamping piece to move, and the stop blocks are fixedly connected with the working surface.

Preferably, auxiliary supporting columns are arranged on two sides of the positioning column and used for supporting shoulders on two sides of the connecting rod body.

Preferably, the clamping piece and the positioning block are both provided with positioning surfaces matched with two sides of the base end of the big head.

Preferably, the cylinder includes the cylinder body, the inside piston that sets up of cylinder body, the piston is connected the piston rod, the piston rod with be equipped with the axle sleeve between the cylinder body, the axle sleeve with cylinder body fixed connection, the cylinder body is kept away from piston rod one end is equipped with the afterbody housing.

Preferably, the diameter of the positioning column is smaller than the aperture of the small end of the connecting rod.

Has the advantages that:

by adopting the lever assembly, the required cylinder thrust is reduced under the same clamping force, and the production cost is reduced; meanwhile, the connecting rod body can be accurately positioned, and the clamping reliability of the connecting rod body is further improved.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.

FIG. 1 is a schematic view of the overall structure of the present invention;

FIG. 2 is a schematic front view of the present invention;

FIG. 3 is a schematic top view of the present invention;

fig. 4 is a schematic sectional view of the cylinder according to the present invention.

Description of reference numerals:

1-a clamp body, 2-a cylinder, 3-a positioning block, 4-a piston rod, 5-a connecting rod, 6-a pressing plate, 7-a support, 8-a base surface, 9-a mandril, 10-a clamping piece, 11-a stop block, 12-a positioning column, 13-an auxiliary supporting column, 14-a connecting rod body, 15-a connecting rod small head, 16-a big head base end, 17-a cylinder body, 18-a shaft sleeve, 19-a piston and 20-a tail cover shell.

Detailed Description

The technical solutions of the present invention will be described clearly and completely with reference to the following embodiments, and it should be understood that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be obtained by a person skilled in the art without making any creative effort based on the embodiments in the present invention, belong to the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations or positional relationships based on those shown in the drawings, merely for convenience of description and simplification of the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed in a particular orientation, and be operated, and thus, are not to be construed as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or to implicitly indicate the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Example 1

As shown in fig. 1-4, a connecting rod body joint surface processing clamp comprises a base surface 8, wherein the base surface 8 is horizontally installed on a milling machine workbench, a clamp body 1 and an air cylinder 2 are arranged on the base surface 8, the air cylinder 2 is fixed on one side of the clamp body 1, and one side, away from the air cylinder 2, of the clamp body 1 is set as a working surface. The cylinder 2 comprises a cylinder body 17, a piston 19 is arranged in the cylinder body 17, the piston 19 is connected with the piston rod 4, a shaft sleeve 18 is arranged between the piston rod 4 and the cylinder body 17, the shaft sleeve 18 is fixedly connected with the cylinder body 17, and a tail cover 20 is arranged at one end, far away from the piston rod 4, of the cylinder body 17. The shaft sleeve 18 between the piston rod 4 and the cylinder body 17 improves the flexibility of the movement of the piston rod 4 and reduces the energy loss in the movement of the piston rod 4.

The moving direction of a piston rod 4 of the air cylinder 2 is parallel to the working surface, the piston rod 4 is connected with a clamping piece 10 through a lever assembly, the clamping piece 10 is located on the working surface, and the piston rod 4 drives the clamping piece 10 to horizontally move along the working surface through the lever assembly. The lever assembly comprises a support 7 and a pressing plate 6, the support 7 is fixedly arranged on one side, adjacent to the working face, of the fixture body 1, and the pressing plate 6 is sequentially connected with a piston rod 4, the support 7 and a clamping piece 10. The distance between the support 7 and the piston rod 4 is larger than the distance between the support 7 and the clamping piece 10, so that the thrust of the air cylinder 2 required by the movement of the clamping piece 10 is reduced, and the production cost is reduced. The piston rod 4 applies acting force to the clamping piece 10 through the pressing plate 6 by adopting a lever principle, so that the acting force to the clamping piece 10 can be effectively increased. The pressing plate 6 is rotatably connected with the piston rod 4 through the connecting rod 5, and two ends of the connecting rod 5 are rotatably connected with the pressing plate 6 and the piston rod 4 respectively, so that the piston rod 4 can stretch out and draw back to apply acting force to the pressing plate 6. The pressure plate 6 is rotatably connected with the support 7, and the support 7 is used as a fulcrum of the lever assembly to play a supporting role. The pressing plate 6 is connected with the clamping piece 10 through a mandril 9, the pressing plate 6 is rotatably connected with one end of the mandril 9, and the other end of the mandril 9 is rotatably connected with the clamping piece 10. The connecting mode increases the flexibility of the lever assembly, and can better drive the clamping piece 10 to move.

In order to ensure that the clamping piece 10 moves in the horizontal direction, the upper side and the lower side of the clamping piece 10 are provided with a stop 11 for guiding the movement of the clamping piece 10, and the stop 11 is fixedly connected with the working surface. The clamping piece 10 moves along the gap between the two stops 11, avoiding the clamping piece 10 deviating from the movement trajectory. In another embodiment, a sliding rail may be provided on the working surface in the horizontal direction, along which the clamping member 10 moves, and the sliding rail is used to define the moving track of the clamping member 10.

The side opposite to the clamping piece 10 on the working surface is provided with a positioning block 3, the clamping piece 10 and the positioning block 3 are arranged oppositely, the clamping piece 10 and the positioning block 3 are both used for fixing a big head base end 16 of the connecting rod body 14, and the clamping piece 10 and the positioning block 3 are both provided with positioning surfaces matched with the two sides of the big head base end 16. The large head base end 16 is attached conveniently and better, and the stability and the reliability of clamping are improved. The lower part of the working face is provided with a positioning column 12 for fixing a small connecting rod head 15 of a connecting rod body 14, the diameter of the positioning column 12 is smaller than the aperture of the small connecting rod head 15, the positioning column 12 can be inserted into a round hole of the small connecting rod head 15 to fix the small connecting rod head 15, and the diameter of the positioning column 12 is close to the aperture of the small connecting rod head 15. Auxiliary supporting columns 13 are arranged on two sides of the positioning column 12, and the auxiliary supporting columns 13 are used for supporting shoulders on two sides of the connecting rod body 14.

The working process is as follows:

when the connecting rod body 14 needs to be fixed, the positioning column 12 is inserted into a circular hole of the small end 15 of the connecting rod, shoulders on two sides of the connecting rod body 14 lean against the auxiliary supporting column 13, and the connecting rod body 14 is preliminarily fixed; at the moment, one side of the big-head base end 16 is close to the positioning block 3, the cylinder 2 is opened, the piston 19 expands to drive the piston rod 4 to move outwards the cylinder body 17, and further the pressing plate 6 is driven to enable the clamping piece 10 to horizontally displace towards the direction close to the big-head base end 16, the stop blocks 11 arranged on the upper side and the lower side of the clamping piece 10 ensure the movement track of the clamping piece 10, the clamping piece 10 is close to the big-head base end 16 and is matched with the positioning block 3, and the big-head base end 16 is fixed between the clamping piece 10 and the positioning block 3. Meanwhile, the clamping piece 10 and the positioning surface on the positioning block 3 are tightly attached to the side surface of the base end 16 of the big end, so that the fixing stability is improved.

After the joint surface of the connecting rod body 14 is processed, the cylinder 2 is started again, the piston 19 contracts to further drive the piston rod 4 to contract towards the inside of the cylinder body 17, the clamping piece 10 is driven by the pressing plate 6 to horizontally displace towards the direction far away from the connecting rod body 14, the connecting rod body 14 is loosened, the processed connecting rod body 14 is taken down, and a work flow is completed.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.

Claims

1. The connecting rod body joint surface machining clamp is characterized by comprising a base surface, wherein a clamp body and an air cylinder are arranged on the base surface, the air cylinder is fixed on one side of the clamp body, one side, away from the air cylinder, of the clamp body is arranged as a working surface, the moving direction of a piston rod of the air cylinder is parallel to the working surface, the piston rod is connected with the clamping piece through a lever component, the clamping piece is located on the working surface, the piston rod drives the clamping piece to move horizontally along the working surface through the lever component, a positioning block is arranged on one side, opposite to the clamping piece, of the working surface, the clamping piece and the positioning block are used for fixing the big end and the base end of a connecting rod body, and a positioning column for fixing the small end of the connecting rod body is arranged on the lower portion of the working surface.

2. The connecting rod body joint surface machining fixture as claimed in claim 1, wherein the lever assembly comprises a support and a pressing plate, the support is fixedly arranged on one side of the fixture body adjacent to the working surface, the pressing plate is sequentially connected with the piston rod, the support and the clamping member, the pressing plate is rotatably connected with the piston rod through a connecting rod, and the pressing plate is rotatably connected with the support and the pressing plate is rotatably connected with the clamping member.

3. The connecting rod body joint surface machining jig according to claim 2, wherein a distance between the holder and the piston rod is larger than a distance between the holder and the clamping member.

4. The connecting rod body joint surface machining clamp as claimed in claim 2, wherein the pressing plate is connected to the clamping member through a push rod, the pressing plate is rotatably connected to one end of the push rod, and the other end of the push rod is rotatably connected to the clamping member.

5. The clamp for processing the joint surface of the connecting rod body as claimed in claim 1, wherein the working surface is provided with a slide rail in a horizontal direction, and the clamping member is movable along the slide rail.

6. The clamp for processing the joint surface of the connecting rod body as claimed in claim 1, wherein the clamping member is provided at both the upper and lower sides thereof with stoppers for guiding the movement of the clamping member, and the stoppers are fixedly connected to the working surface.

7. The clamp for processing the joint surface of the connecting rod body as recited in claim 1, wherein auxiliary supporting columns are provided on both sides of the positioning column, and the auxiliary supporting columns are used for supporting shoulders on both sides of the connecting rod body.

8. The clamp for processing the joint surface of the connecting rod body as claimed in claim 1, wherein the clamping member and the positioning block are provided with positioning surfaces for engaging with both sides of the base end of the large head.

9. The connecting rod body joint surface machining fixture as claimed in claim 1, wherein the cylinder comprises a cylinder body, a piston is arranged in the cylinder body and connected with the piston rod, a shaft sleeve is arranged between the piston rod and the cylinder body and fixedly connected with the cylinder body, and a tail cover is arranged at one end of the cylinder body, which is far away from the piston rod.

10. The clamp for processing the joint surface of the connecting rod body as claimed in claim 1, wherein the diameter of the positioning post is smaller than the diameter of the small end of the connecting rod.