阅读说明：本技术 用于检测曲臂差的钻孔装置 (Drilling device for detecting crank arm difference ) 是由 郑奇峰 黎锋 易丽群 雷国荣 何家袍 于 2021-09-01 设计创作，主要内容包括：本发明属于曲轴检修设备领域,具体涉及一种用于检测曲臂差的钻孔装置,包括两个60°冲头,还包括支架、旋转接头、制转装置、固定螺柱、棱形双头螺柱,棱形双头螺柱两头的螺纹方向相反,所述支架包括钻孔部和与钻孔部两侧相连的对称设置的两个翼板,钻孔部为U形框体,棱形双头螺柱设置在U形框体中,两个旋转接头分别设置在两个横向通孔内,使用时,定位水平面紧贴曲轴的配重块安装端面,支架固定在配重块安装端面上,两个60°冲头对正曲臂上待钻孔位置,旋转棱形双头螺柱,两个旋转接头在棱形双头螺柱的驱动下朝外移动,被旋转接头推动向外移动实现对曲臂钻孔,该钻孔装置定位迅速,打孔效率高,具有结构简单操作方便的优点。(The invention belongs to the field of crankshaft overhauling equipment, and particularly relates to a drilling device for detecting crank arm difference, which comprises two 60-degree punches, a support, a rotary joint, a rotation making device, a fixing stud and a prismatic stud, wherein the thread directions of two ends of the prismatic stud are opposite, the support comprises a drilling part and two wing plates which are symmetrically arranged and connected with two sides of the drilling part, the drilling part is a U-shaped frame body, the prismatic stud is arranged in the U-shaped frame body, the two rotary joints are respectively arranged in two transverse through holes, when the device is used, a positioning horizontal plane is tightly attached to a counterweight mounting end face of a crankshaft, the support is fixed on the counterweight mounting end face, the two 60-degree punches are aligned to positions to be drilled on a crank arm, the prismatic stud is rotated, the two rotary joints are driven by the prismatic stud to move outwards and are pushed by the rotary joints to move outwards to realize the drilling of the crank arm, the drilling device has the advantages of rapid positioning, high drilling efficiency and simple structure and convenient operation.)

1. A drilling device for detecting crank arm difference comprises two 60-degree punch heads which are transversely arranged, and is characterized by further comprising a support, a rotary joint, a rotation making device, a fixing stud and a prismatic stud, wherein the thread directions of two ends of the prismatic stud are opposite, one end of the rotary joint is matched and screwed with the end of the prismatic stud, the two ends of the prismatic stud are respectively provided with one rotary joint, the other end of the rotary joint is connected with the 60-degree punch head, the central line of the 60-degree punch head is consistent with the axis of the prismatic stud, the support comprises a drilling part and two wing plates which are symmetrically arranged and are connected with two sides of the drilling part, the drilling part is a U-shaped frame body, two symmetrical transverse through holes are arranged at the upper parts of two side walls of the U-shaped frame body, the diameter of each transverse through hole is matched with the outer diameter of the rotary joint, the rotation making device is arranged in each transverse through hole, and one side of each wing plate is connected with the outer side of the top end of the U-shaped frame body, the wing plate bottom is equipped with the location horizontal plane, be equipped with the bolt through-hole of inserting fixing stud soon on the wing plate, prismatic stud sets up in the U-shaped framework, two rotary joint set up respectively in two horizontal through-holes, rotary joint can only follow axial displacement by the restraint of restraining device and horizontal through-hole wall, during the use, the balancing weight installation end face of bent axle is hugged closely to the location horizontal plane, fixing stud inserts in the balancing weight installation screw soon and fixes the support on balancing weight installation end face, two 60 drift treat the drilling position on the arm that bends to right, rotatory prismatic stud, two rotary joint move outwards under prismatic stud's drive, it realizes the drilling of the arm that bends to be promoted to move outwards by rotary joint.

2. A drilling apparatus for detecting crank arm difference according to claim 1, wherein one end of the 60 ° punch is installed in a blind hole at the center of the end face of the rotary joint, and the height of the 60 ° punch protruding from the end face of the rotary joint is equal to the depth required for drilling.

3. The drilling device for detecting crank arm difference as claimed in claim 1, wherein the rotation-making device comprises a rotation-making plane and a rotation-making screw column, the rotation-making plane is parallel to the axis of the rotary joint and is arranged on the outer wall of the rotary joint, the rotation-making screw column is arranged in the through hole on the U-shaped frame body, the rotation-making screw column is perpendicular to the rotation-making plane, when in use, one end face of the rotation-making screw column is attached to the rotation-making plane, and the rotary joint cannot rotate under the constraint of the rotation-making screw column and the rotation-making end face.

4. The drilling device for detecting crank arm difference as claimed in claim 1, wherein the rotation-making device comprises a rotation-making groove and a rotation-making stud, the rotation-making groove is arranged on the outer wall of the rotary joint, the direction of the rotation-making groove is parallel to the axis of the rotary joint, the rotation-making stud is arranged in a through hole in the U-shaped frame body, the diameter of the rotation-making stud is matched with the width of the rotation-making groove, when in use, one end of the rotation-making stud is inserted into the rotation-making groove, and the rotary joint cannot rotate under the constraint of the rotation-making stud and the rotation-making groove.

Technical Field

The invention belongs to the field of crankshaft overhauling equipment, and particularly relates to a drilling device for detecting crank arm difference.

Background

The internal combustion engine is operated with uneven wear of the main bearings of the respective tracks, causing global and local deformations of the crankshaft. The crank throw difference (crank throw difference) is measured to know and control the deformation of the crank shaft and the abrasion of the main bearing so as to prevent the fatigue damage of the crank shaft. In order to quickly and accurately mount the crank gauge, a hole is drilled at (S + D)/2 (S is a piston stroke, D is a main journal diameter) on the central symmetry line of the inner side of the crank arm when the crank shaft is manufactured, and the hole is used as a fixed measuring point.

In the prior art, in order to punch crank arm difference positioning holes on two crank arm surfaces, a punch with a sharp head angle of 60 degrees is used, and the rear end of the punch is knocked by a hand-held punch with a hammer to punch holes at determined points on the crank arm surfaces. Or a simple screw punch assembly is used, and holes are punched at the marked determined positions by rotating the screw.

This kind of mode of punching of above-mentioned prior art, because two crank arm face intervals are less, the drift can only the slant stretch into the crank arm face to one side and punch the operation, and human factor influence error is great, and the operation is inconvenient, need measure the sign in advance and punch the position, and the quality of punching a hole is poor, and position, aperture, the unable accurate control of hole depth lead to the arm apart from the both ends pole of table not good when inserting the locating hole, influence detection, it is accurate low to detect.

The crank is usually provided with a balancing weight, some crankshafts, particularly medium-large crankshafts (with the diameter of more than 130 mm), the balancing weight is usually arranged at the tail end of the crank through bolts, and the end surface of the crank for mounting the balancing weight is parallel to the axis of the crankshaft.

Disclosure of Invention

The invention aims to provide a drilling device for detecting crank arm difference, which is rapid in positioning and good in drilling effect, aiming at the defects in the prior art.

The technical scheme for achieving the aim comprises the following contents.

A drilling device for detecting crank arm difference comprises two 60-degree punches transversely arranged, a support, a rotary joint, a rotation making device, a fixing stud and a prismatic stud, wherein the thread directions of the two ends of the prismatic stud are opposite, one end of the rotary joint is matched with and screwed at the end of the prismatic stud, the two ends of the prismatic stud are respectively provided with one rotary joint, the other end of the rotary joint is connected with the 60-degree punches, the central line of the 60-degree punches is consistent with the axis of the prismatic stud, the support comprises a drilling part and two wing plates symmetrically arranged and connected with the two sides of the drilling part, the drilling part is a U-shaped frame body, the upper parts of the two side walls of the U-shaped frame body are provided with two symmetrical transverse through holes, the diameter of the transverse through holes is matched with the outer diameter of the rotary joint, the rotation making device is arranged in each transverse through hole, and one side of each wing plate is connected with the outer side of the top end of the U-shaped frame body, the wing plate bottom is equipped with the location horizontal plane, be equipped with the bolt through-hole of inserting fixing stud soon on the wing plate, prismatic stud sets up in the U-shaped framework, two rotary joint set up respectively in two horizontal through-holes, rotary joint can only follow axial displacement by the restraint of restraining device and horizontal through-hole, during the use, the balancing weight mounting surface of bent axle is hugged closely to the location horizontal plane, fixing stud inserts in the balancing weight mounting surface soon and fixes the support on balancing weight mounting surface, two 60 drifts treat the drilling position on the arm of cranking just, rotatory prismatic stud, two rotary joint move outwards under prismatic stud's drive, it realizes the drilling of cranking arm to be promoted to move outwards by rotary joint.

Further, one end of the 60-degree punch is installed in the blind hole in the center of the end face of the rotary joint, the height of the 60-degree punch protruding out of the end face of the rotary joint is equal to the required depth of the drilled hole, and the arrangement is favorable for accurately grasping the depth of the drilled hole.

Preferably, the rotation making device comprises a rotation making plane and a rotation making screw column, the rotation making plane is parallel to the axis of the rotary joint and is arranged on the outer wall of the rotary joint, the rotation making screw column is arranged in the through hole in the U-shaped frame body, the rotation making screw column is perpendicular to the rotation making plane, when the rotation making device is used, one end face of the rotation making screw column is attached to the rotation making plane, and the rotary joint cannot rotate under the constraint of the rotation making screw column and the rotation making end face.

The other optimization scheme is that the rotation making device comprises a rotation making groove and a rotation making stud, the rotation making groove is formed in the outer wall of the rotary joint, the direction of the rotation making groove is parallel to the axis of the rotary joint, the rotation making stud is arranged in the through hole in the U-shaped frame body, the diameter of the rotation making stud is matched with the width of the rotation making groove, one end of the rotation making stud is inserted into the rotation making groove when the rotation making device is used, and the rotary joint cannot rotate under the constraint of the rotation making stud and the rotation making groove.

When the drilling device is used, the U-shaped frame body of the support is placed between the two cranks, the two wing plates of the support are aligned to the counterweight block mounting surfaces of the two cranks, the fixing studs on the wing plates are inserted into the counterweight block mounting screw holes in a rotating mode, the positioning horizontal planes of the two wing plates are ensured to be respectively tightly attached to the counterweight block mounting surfaces of the two cranks, the two 60-degree punches are right aligned to positions to be drilled on the crank arm surface at the moment, the prismatic stud is rotated, the rotating joint is driven to move towards two ends, the two 60-degree punch rotating joints move and are in contact with the crank arm surface, the prismatic stud is continuously rotated, and the 60-degree punches start drilling until the preset depth is completed; and reversing the prismatic stud to enable the 60-degree punch to withdraw from the drilling hole, screwing the fixing stud out of the mounting screw hole of the balancing weight, and then detaching the drilling device from the crankshaft.

The technical characteristic that the counterweight block mounting surface on the crank is provided with the fixed position is utilized, the position to be drilled on the crank arm surface is a determined distance h from the counterweight block mounting surface, the 60-degree punch can only move along the axis in the transverse through hole along with the rotary joint, the distance between the 60-degree punch and the positioning horizontal plane of the wing plate is ensured to be a constant value, and if the constant value is set to be h, after the drilling device is mounted on the counterweight block mounting surface, the two 60-degree punches are opposite to the position to be drilled on the crank arm surface at the moment.

The drilling device can realize self-positioning, quick and accurate drilling of the crankshaft crank arm difference measurement reference hole, is simple and clear to operate, is light and portable, is low in manufacturing cost, and effectively improves the drilling efficiency. This device can punch the operation to the poor measurement reference hole of bent axle crank arm in on-the-spot optional position, and is not high to operating personnel technical skill requirement, and the position precision that punches can accomplish punching of the poor measurement reference hole of crank arm of single crank throw in 2 min, need not to measure the position of the poor measurement reference hole of sign crank arm in advance, and operating personnel can make things convenient for the operation of punching of quick, accurate completion crank arm difference measurement reference hole.

Drawings

FIG. 1 is a schematic view of a first embodiment of the present invention in a use state;

FIG. 2 is an enlarged view of portion A of FIG. 1;

fig. 3 is a schematic partial structure diagram of a second embodiment of the present invention.

In the drawings, 1. a bracket; 1-1. U-shaped frame body; 1-2. wing plate; 1-2-1, positioning a horizontal plane; 2. a prismatic stud; fixing the stud; 4. a rotary joint; 4-1. making a rotary plane (a rotary groove); a 5.60 ° punch; 6. manufacturing a stud; 7. a crankshaft; 7-1, installing an end face of a balancing weight; 7-2. a screw hole is arranged on the balancing weight.

Detailed Description

The present invention will be described in detail with reference to examples.

Example one

Referring to fig. 1 and 2, a drilling device for detecting crank arm difference comprises two 60-degree punches 5 arranged transversely, a support 1, a rotary joint 4, a rotation making device, a fixed stud 3 and a prismatic stud 2, wherein the thread directions of two ends of the prismatic stud 2 are opposite, one end of the rotary joint 4 is matched and screwed with the end head of the prismatic stud 2, two end heads of the prismatic stud 2 are respectively provided with the rotary joint 4, one end of the 60-degree punch 5 is arranged in a blind hole in the center of the other end face of the rotary joint 4, the height of the 60-degree punch protruding out of the end face of the rotary joint 4 is equal to the depth required by drilling, the center line of the 60-degree punch 5 is consistent with the axis of the prismatic stud 2, the support 1 comprises a drilling part and two wing plates 2 which are symmetrically arranged and are connected with two sides of the drilling part, the drilling part is a U-shaped frame body 1-1, two symmetrical transverse through holes are arranged on two side walls of the upper part of the U-shaped frame body 1-1, the diameter of the transverse through hole is matched with the outer diameter of the rotary joint 4, a rotation making device is arranged in the transverse through hole and comprises a rotation making plane 4-1 and a rotation making screw column 6, the rotation making plane 4-1 is a plane cut on the outer wall of the rotary joint 4, the rotation making plane 4-1 is parallel to the axis of the rotary joint 4, the rotation making screw column 6 is arranged in the through hole on the U-shaped frame body 1-1, the rotation making screw column 6 is vertical to the rotation making plane 4-1, the bottom end surface of the rotation making screw column 6 is abutted against the rotation making plane 4-1, one side of the wing plate 2 is connected with the outer side of the top end of the U-shaped frame body 1-1, the bottom of the wing plate 2 is provided with a positioning horizontal plane 1-2, the wing plate 2 is provided with a bolt through hole for inserting a fixing bolt 3 in a rotating manner, the prismatic stud 2 is arranged in the U-shaped frame body 1-1, the two rotary joints 4 are respectively arranged in the two transverse through holes, the rotary joint 4 is constrained by the bottom end face of the rotation stud 6 and the wall of the transverse through hole and can only move axially, when the rotary joint is used, the positioning horizontal plane 1-2-1 is tightly attached to the counterweight block mounting end face 7-1 of the crankshaft 7, the fixing stud 3 is inserted into the counterweight block mounting screw hole 7-2 in a rotating mode and fixes the support 1 on the counterweight block mounting end face 7-1, the two 60-degree punches 5 are aligned to positions to be drilled on the crank arm, the prismatic stud 2 is rotated, the two rotary joints 4 move outwards under the driving of the prismatic stud 2 and are pushed by the rotary joints 4 to move outwards to drill the crank arm, when the end face of the rotary joint 4 contacts with the crank arm face, the drilling depth is achieved, drilling is completed, and then the drilling device can be disassembled.

Example two

Referring to fig. 3, the difference between the present embodiment and the first embodiment is that the structure, other structure and using method of the rotation making device are the same as those of the first embodiment, the rotation making device of the present embodiment includes a rotation making groove 4-1 and a rotation making stud 6, the rotation making groove 4-1 is disposed on the outer wall of the rotary joint 4, the direction of the rotation making groove 4-1 is parallel to the axis of the rotary joint 4, the rotation making stud 6 is disposed in the through hole of the U-shaped frame 1-1, the diameter of the rotation making stud 6 is adapted to the width of the rotation making groove 4-1, when in use, the bottom end of the rotation making stud 6 is inserted into the rotation making groove 4-1, and the rotary joint 4 cannot rotate under the constraint of the rotation making stud 6 and the rotation making groove 4-1.