CN212843893U

CN212843893U - Diesel engine connecting rod big and small end weighing balance tool

Info

Publication number: CN212843893U
Application number: CN202021167668.2U
Authority: CN
Inventors: 王金涛; 李福清; 林鹏; 苏慧祎; 矫莉
Original assignee: Yantai Engineering and Technology College
Current assignee: Yantai Engineering and Technology College
Priority date: 2020-06-22
Filing date: 2020-06-22
Publication date: 2021-03-30
Anticipated expiration: 2030-06-22

Abstract

The utility model relates to the technical field of mechanical checking fixture tools, in particular to a large and small end weighing balance tool for a diesel engine connecting rod, which comprises a base, an L-shaped first supporting part, a second supporting part and a weighing device, wherein the L-shaped first supporting part is fixedly connected with the base; the fixed pin supporting seat comprises a supporting base and a left rotating shaft, a left big head positioning pin and a left small head positioning pin are fixed on two sides of the left rotating shaft, a right rotating shaft is movably connected to the second supporting part, a right big head positioning pin and a right small head positioning pin are fixed on two symmetrical sides of the right rotating shaft, the axle centers of the left rotating shaft and the right rotating shaft are located on the same horizontal plane, the tool can accurately weigh the big head and the small head of the connecting rod, twice weighing is completed in one-time positioning, and the device is simple and convenient to use.

Description

Diesel engine connecting rod big and small end weighing balance tool

Technical Field

The utility model relates to a frock technical field is examined to machinery, concretely relates to balanced frock of big, the tip of diesel engine connecting rod weighing.

Background

The crankshaft connecting rod is an important transmission part of the diesel engine, when the diesel engine works, the small end of the connecting rod does reciprocating motion along with the piston, the large end of the connecting rod does rotary motion along with the crankshaft pin, the rod body between the large end and the small end of the connecting rod does complex swinging motion, and the weight of the large end and the small end of the connecting rod has important influence on the running balance state, vibration and noise of the diesel engine. In the processing process of the connecting rod, the weight control method comprises the following general steps: after assembly, the weight of the connecting rod is weighed on a one-bar electronic scale, and the weight-removed portion is removed according to the reading and calculation, so that the overall weight of the connecting rod is within the design range. However, the disadvantage of this weighing method is that although the overall weight of the connecting rod is up to the required value, the center of gravity of the big end and the small end of the connecting rod is deviated, thereby affecting the use performance of the connecting rod.

A crankshaft connecting rod big-small head weighing detection tool (publication No. CN 205785464U, publication date 2016.12.07) with patent number 201620497262.8 comprises a base, an L-shaped first supporting part, a cross rod, a hanging part, a big-head positioning pin, a small-head positioning pin, a second supporting part and a weighing device, wherein the L-shaped first supporting part is fixedly connected with the base, the cross rod is fixedly connected with the L-shaped first supporting part, the hanging part is hinged with the cross rod, the second supporting part is arranged on the weighing device, the big-head positioning pin is detachably connected to the lower end of the hanging part, and the small-head positioning pin is detachably connected to the upper end of the second supporting part; the center of the big head positioning pin and the center of the small head positioning pin are positioned on the same horizontal plane, wherein the weighing device is an electronic scale. Although simple structure, this patent is because only a balance, weighs at every turn and only can weigh the weight of one of them head earlier, and major part locating pin and microcephaly locating pin are the odd bits of a knife or a sword of connecting rod respectively, and this project organization just leads to weighing to accomplish at every turn around the location again after, complex operation, and is more time-wasting.

SUMMERY OF THE UTILITY MODEL

To the not enough in the background art, the utility model provides a diesel engine connecting rod is big, the tip balance frock of weighing, this examine a frock can carry out more accurate weighing to the reducer of connecting rod, can once fix a position and accomplish twice and weigh to the device is simple, convenient to use.

In order to achieve the above purpose, the utility model adopts the technical scheme that: the utility model provides a big, the tip of diesel engine connecting rod balance frock of weighing, includes base, the first supporting part of L type, second supporting part and weighing device, the first supporting part of L type and base fixed connection, the second supporting part sets up on weighing device, its characterized in that: the rotary joint clamping device comprises a first support part, a rotary joint clamping part and a fixed pin support seat, wherein the upper end of the first support part is fixed on the L-shaped support part; the fixed pin supporting seat comprises a supporting base and a left rotating shaft, the left rotating shaft is movably connected to the supporting base and can rotate around the Z axis direction, a left big-end positioning pin and a left small-end positioning pin are fixed to two symmetrical sides of the left rotating shaft respectively, the right rotating shaft is movably connected to the second supporting portion and can rotate around the Z axis direction, a right big-end positioning pin and a right small-end positioning pin are fixed to two symmetrical sides of the right rotating shaft respectively, and the axes of the left rotating shaft and the right rotating shaft are located on the same horizontal plane.

Preferably, the second support part is arranged in the middle of the weighing platform of the weighing device.

Preferably, the lower ends of the left rotating shaft and the right rotating shaft are respectively provided with a limiting ball valve which rotates 180 degrees.

Preferably, the rotary joint clamping part mainly comprises a universal joint and a contraction clamping frame, the contraction clamping frame is fixed at the lower end of the universal joint, the contraction clamping frame is in a scissors shape and comprises a pin shaft, an upper clamping piece, a lower clamping piece and a return spring arranged between the two clamping pieces, the lower connecting end of the universal joint is U-shaped, and two ends of the pin shaft are fixed on two side walls of the lower opening end of the U-shaped universal joint.

Preferably, the rotary joint clamping piece is arranged at the symmetrical center point of the left rotating shaft and the right rotating shaft.

The utility model has the advantages that:

1. the utility model provides a big, the tip of diesel engine connecting rod balance frock of weighing, the revolute joint holder of fixed connecting rod can rotate, and the wherein one end of connecting rod is weighed the back and need not take off the size of reinstallating another of balance in whole, and the major part locating pin and the tip locating pin of the left and right sides can switch over at will for the connecting rod after the rotation still can fix a position fixedly fast.

2. The big of the left and right sides, little first locating pin is in the coplanar, the rotary joint holder in the middle of the two makes the macropore and the aperture of the connecting rod after the centre gripping just fix a position on the locating pin, make only need fix a position once the connecting rod just can accomplish twice weighing process, left and right revolving shaft is rotatory to 180 to remain at the coplanar for both sides all the time, make the connecting rod better location before weighing, whole utensil simple structure of examining, high durability and convenient use, can carry out more accurate weighing to the connecting rod big small head of bent diesel engine.

Drawings

FIG. 1 is a schematic structural diagram of a weighing state of a large-end and small-end weighing balance tool of a diesel engine connecting rod in a front view;

FIG. 2 is a schematic view of a weighing state of a large-end and small-end weighing balance tool of a diesel engine connecting rod;

fig. 3 is a left-side view structural schematic diagram of a diesel engine connecting rod large-end and small-end weighing balance tool.

In the figure: 1-base, 2-L-shaped first supporting part, 3-second supporting part, 31-right rotating shaft, 4-weighing device, 5-suspension arm, 6-rotary joint clamping piece, 61-universal joint, 62-contraction clamping frame, 7-fixed pin supporting seat, 71-supporting base, 72-left rotating shaft, 73-left large head positioning pin, 74-left small head positioning pin, 75-limit ball valve and 8-connecting rod.

Detailed Description

For better understanding of the present invention, the contents of the present invention will be further clarified below with reference to the accompanying drawings and examples, but the contents of the present invention are not limited to the following examples.

As shown in fig. 1-3, the large and small end weighing balance tool for a diesel engine connecting rod according to the present invention comprises a base 1, an L-shaped first supporting portion 2, a second supporting portion 3, a weighing device 4, a suspension arm 5, a rotary joint clamping member 6, and a fixing pin supporting seat 7, wherein the L-shaped first supporting portion 2 is fixedly connected to the base 1, the second supporting portion 3 is disposed on the weighing device 4, the suspension arm 5 is fixed to the L-shaped first supporting portion 2 at an upper end thereof, the rotary joint clamping member 6 is connected to a lower end thereof, the fixing pin supporting seat 7 comprises a supporting base 71 and a left rotating shaft 72, the left rotating shaft 72 is movably connected to the supporting base 71 and can rotate around the Z-axis direction, i.e. the vertical direction in fig. 1, a left large head positioning pin 73 and a left small head positioning pin 74 are respectively fixed to two symmetrical sides of the left rotating shaft 72, the right rotating shaft 31 is movably connected to the second supporting portion 3, and the right rotating shaft 31 can rotate around the Z-axis, a right big-head positioning pin and a right small-head positioning pin are respectively fixed on two symmetrical sides of the right rotating shaft 31, and the axes of the left rotating shaft 72 and the right rotating shaft 31 are positioned on the same horizontal plane.

The second supporting part 3 is arranged in the middle of a weighing platform of the weighing device 4, so that weighing data are more accurate, and the weighing device 4 is an electronic scale.

The lower ends of the left rotating shaft 72 and the right rotating shaft 31 are both provided with a limiting ball valve 75 which can rotate 180 degrees, only the left big-end positioning pin 73 and the left small-end positioning pin 74 can rotate 90 degrees back and forth, and the left big-end positioning pin and the left small-end positioning pin can be always kept on the same vertical plane with the clamping position of the contraction clamping frame, namely, the big end and the small end of the connecting rod 8 can be kept on the same vertical plane after being clamped and positioned, and weighing.

The rotary joint clamping piece 6 mainly comprises a universal joint 61 and a contraction clamping frame 62, the contraction clamping frame 62 is fixed at the lower end of the universal joint 61, the contraction clamping frame 62 is in a scissors shape and comprises a pin shaft, an upper clamping piece, a lower clamping piece and a return spring arranged between the two clamping pieces, the lower connecting end of the universal joint 61 is U-shaped, and two ends of the pin shaft are fixed on two side walls of the lower opening end of the U-shaped universal joint 61.

The rotary joint holder 6 is placed at the symmetrical center point of the left rotating shaft 72 and the right rotating shaft 31.

The specific use process of the weighing balance tool in the embodiment is as follows:

1. the base 1, the electronic scale and the fixed pin supporting seat 7 are put on the same horizontal plane to be debugged, the alignment of the base 1, the electronic scale and the fixed pin supporting seat is guaranteed, the axes of the left rotating shaft 72 and the right rotating shaft 31 are guaranteed to be in the same horizontal plane, and the reading of the electronic scale is recorded as zero.

2. Then the big head and the small head of the connecting rod 8 are fixed on the positioning pins of the left rotating shaft 72 and the right rotating shaft 31, and the positioning pins of the big head and the small head on the left side and the right side are matched with the connecting rod, so that the sequence is not arranged.

3. Then the contraction clamping frame 62 of the rotary joint clamping piece 6 is clamped on the connecting rod 8 and is clamped at the rod part position of the big-small symmetrical center of the connecting rod 8.

4. The belt is firstly placed at the two ends of the left and right positioning pins after weighing is completed, the left big-end positioning pin 73 and the left small-end positioning pin 74 on the left rotating shaft 72 can be rotated, the right big-end positioning pin and the right small-end positioning pin on the right rotating shaft 31 are rotated, the positions are exchanged, so that the big end and the small end of the rotated connecting rod 8 are matched, weighing is continuously completed, the telescopic clamping frame 62 is loosened to take down the connecting rod 8 after weighing is completed, and the big end and the small end of the next connecting rod are weighed continuously.

The above description is only for the specific embodiments of the present invention, but the protection scope of the present invention is not limited thereto, and any person skilled in the art can easily think of the changes or substitutions within the technical scope of the present invention, and all should be covered within the protection scope of the present invention. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.

Claims

1. The utility model provides a big, tip of diesel engine connecting rod balance frock of weighing, includes base (1), the first supporting part of L type (2), second supporting part (3) and weighing device (4), the first supporting part of L type (2) and base (1) fixed connection, second supporting part (3) set up on weighing device (4), its characterized in that: the device is characterized by further comprising a suspension arm (5), a rotary joint clamping piece (6) and a fixed pin supporting seat (7), wherein the upper end of the suspension arm (5) is fixed on the L-shaped first supporting part (2), and the lower end of the suspension arm is connected with the rotary joint clamping piece (6);

fixed pin supporting seat (7) are including supporting base (71) and left rotation axle (72), and left axis of rotation (72) swing joint is just can be rotatory around Z axle direction on supporting base (71), is fixing left major part locating pin (73) and left microcephaly locating pin (74) respectively in the symmetry both sides of left rotation axle (72), swing joint right axis of rotation (31) and right rotation axle (31) can be rotatory around Z axle direction on second supporting part (3), are fixing right major part locating pin and right microcephaly locating pin respectively in the symmetry both sides of right axis of rotation (31), the axle center of left side axis of rotation (72) and right rotation axle (31) is located same horizontal plane.

2. The diesel engine connecting rod big-end and small-end weighing balance tool according to claim 1, wherein the second supporting part (3) is arranged in the middle of a weighing platform of the weighing device (4).

3. The diesel engine connecting rod big-end and small-end weighing balance tool according to claim 1, wherein the lower ends of the left rotating shaft (72) and the right rotating shaft (31) are respectively provided with a limiting ball valve (75) which rotates 180 degrees.

4. The diesel engine connecting rod big-end and small-end weighing balance tool according to claim 1, characterized in that the rotary joint clamping piece (6) mainly comprises a universal joint (61) and a contraction clamping frame (62), the contraction clamping frame (62) is fixed at the lower end of the universal joint (61), the contraction clamping frame (62) is in a scissors shape and comprises a pin shaft, an upper clamping piece, a lower clamping piece and a return spring arranged between the two clamping pieces, the lower connecting end of the universal joint (61) is in a U shape, and two ends of the pin shaft are fixed on two side walls of the lower opening end of the U-shaped universal joint (61).

5. The diesel engine connecting rod big-end and small-end weighing balance tool according to claim 4, characterized in that the rotary joint clamping piece (6) is arranged at the symmetrical center point of the left rotating shaft (72) and the right rotating shaft (31).