CN220136824U - Auxiliary tool for detecting surface hardness of crankshaft journal - Google Patents

Abstract

The utility model discloses an auxiliary tool for detecting the surface hardness of a crankshaft journal, which comprises a supporting device, a detecting pen mounting device and a detecting pen moving device, wherein the detecting pen mounting device and the detecting pen moving device are fixed on the supporting device, and the auxiliary tool comprises the following components: the detection pen moving device is matched with the T-shaped groove of the bottom plate of the supporting device through the bottom boss, and the screw rod and the T-shaped nut slide left and right along the T-shaped groove, so that the purpose of detecting the transverse movement of the pen is achieved, the outer circle of the moving device is assembled with the clamping position of the detection device, and the screw rod is matched with the groove of the outer circle of the moving device to perform vertical direction and angular positioning. The tool can realize that the sclerometer is vertical to the detected surface of the crankshaft in the detection process, reduce detection instability factors brought by people, improve detection accuracy, reduce material running time and improve production efficiency.

Description

Auxiliary tool for detecting surface hardness of crankshaft journal

Technical Field

The utility model relates to the field of manufacturing of engine parts, in particular to an auxiliary tool for detecting the surface hardness of a crankshaft journal.

Background

The crankshaft is an important part of high rotation in the engine, and the crankshaft needs to bear the force from the connecting rod in the working process and is converted into torque to be transmitted to other parts to drive the other parts to work. The crankshaft is subjected to bending and torsion load due to the combined action of centrifugal force of the rotating mass, periodically-changed gas inertia force and reciprocating inertia force. If the surface hardness of the crankshaft is unqualified, the abrasion progress of the journal can be accelerated, and the journal is scrapped in advance before the rated service life is reached, so that the detection of whether the surface hardness of the journal of the crankshaft is qualified is an important procedure in the crankshaft manufacturing process.

Disclosure of Invention

Aiming at the problems that the existing crankshaft hardness tester manually detects for a plurality of times and the detection position is inaccurate, the utility model provides an auxiliary tool for detecting the surface hardness of a crankshaft journal, so as to realize the purpose of rapidly and accurately detecting the crankshaft hardness.

The technical scheme for realizing the aim of the utility model is as follows:

the utility model provides a bent axle journal surface hardness detects auxiliary fixtures, includes strutting arrangement, fixes the detection pen installation device and the detection pen mobile device on strutting arrangement, wherein:

the supporting device consists of a bottom plate, a V-shaped block and a hardness meter placing area, wherein the bottom plate and the V-shaped block pass through a strip counter bore device to fix the position of the V-shaped block and support a crankshaft, so that the crankshaft positioning and the crankshaft rotation are not influenced in the detection process, the hardness meter placing area consists of a hardness meter placing bracket and a connecting block, the connecting block is connected with the bottom plate, and the connecting block is used for adjusting the angle of the hardness meter placing bracket, so that the detection personnel can conveniently conduct reading operation;

the detection pen mounting device consists of a positioning block and a limiting block, wherein the positioning block is attached to the lower half conical surface of the detection pen through the conical surface, so that the position of the detection pen is positioned; the limiting block is attached to the upper half conical surface of the detection pen through a conical surface opposite to the positioning block, a clearance gap is formed at the same time, the wiring position of the detection pen is avoided in the assembly process, the positioning block is connected with the limiting block through a pin rod, the positioning block is in interference fit with the pin rod, the limiting block is in clearance fit with the pin rod and locked through a bolt, and the position of the detection pen is fixed through the limiting block;

the detection pen moving device is matched with the T-shaped groove of the bottom plate of the supporting device through the bottom boss, and the screw rod and the T-shaped nut slide left and right along the T-shaped groove, so that the purpose of detecting the transverse movement of the pen is achieved, the outer circle of the moving device is assembled with the clamping position of the detection device, and the screw rod is matched with the groove of the outer circle of the moving device to perform vertical direction and angular positioning.

Compared with the existing crankshaft hardness detection technology, the hardness detection tool is simple in structure and convenient to use. The vertical movement of the detection pen is controlled through the tool movement, so that whether the surface hardness of the journal meets the requirements of customers or not is detected, and the identification accuracy and the identification efficiency are high.

Drawings

FIG. 1 is a schematic diagram of the overall structure of an embodiment detection tool;

FIG. 2 is a schematic illustration of the overall structure of an embodiment support device and crankshaft journal placement;

FIG. 3 is a schematic view showing the overall structure of the test pen mounting device according to the embodiment;

FIG. 4 is a schematic diagram of the overall structure of an embodiment detection pen mobile device;

in the figure: the device comprises a 1 supporting device, a 1-1 bottom plate, a 1-2V type block, a 1-3 durometer placing area, a 1-4 strip counter bore, a 1-5 durometer placing support, a 1-6 connecting block, a threaded connection of the 1-7 connecting block and the bottom plate, a 1-8 durometer placing support angle, a 1-9T-shaped groove, a 2 detection pen mounting device, a 2-1 positioning hole, a 2-2 limiting block, a 2-3 positioning block conical surface, a 2-4 limiting block conical surface, a 2-5 vacancy avoidance hole, a 2-6 pin, a 2-7 limiting block and pin locking structure, a 2-8 positioning block and moving device assembling cylindrical surface, a 2-9 positioning block and moving device locking structure, a 3 detection pen moving device, a 3-1 detection pen moving device bottom boss, a 3-2 screw, a 3-3 moving device and positioning block assembling cylindrical surface and a 3-4 moving device and positioning block assembling positioning groove.

Description of the embodiments

The present utility model will be further described with reference to examples and drawings, but the present utility model is not limited thereto.

Examples

Referring to fig. 1-4, an auxiliary tool for detecting the surface hardness of a crank shaft journal comprises a supporting device 1, a detecting pen mounting device 2 and a detecting pen moving device 3 in an integral structure;

the supporting device 1 consists of a bottom plate 1-1, a V-shaped block 1-2 and a durometer placing area 1-3, wherein the bottom plate 1-1 and the V-shaped block 1-2 are assembled by threads through a strip counter bore 1-4 to fix the position of the V-shaped block 1-2, and the V-shaped block 1-2 is mainly used for supporting a crankshaft, so that the crankshaft positioning and the crankshaft rotation are not influenced in the detection process; the sclerometer placing area 1-3 is composed of a sclerometer placing support 1-5 and a connecting block 1-6, the connecting block 1-6 and the bottom plate 1-1 are connected by threads 1-7, and the connecting block 1-6 is used for providing an angle 1-8 of the sclerometer placing support 1-5, so that a detecting personnel can conveniently conduct reading operation.

The detection pen mounting device 2 is divided into a positioning block 2-1 and a limiting block 2-2, wherein the positioning block adopts a conical surface 2-3 to be attached to the lower half conical surface of the detection pen, so that the position of the detection pen is positioned; the limiting block 2-2 is attached to the upper half conical surface of the detection pen by adopting a conical surface 2-4 opposite to the positioning block 2-1, meanwhile, a avoidance space 2-5 is formed, the wiring position of the detection pen is avoided in the assembly process, the positioning block 2-1 is connected with the limiting block 2-2 by adopting a pin 2-6, the positioning block 2-1 is in interference fit with the pin 2-6, the limiting block 2-2 is in clearance fit with the pin 2-6 and locked by adopting a bolt 2-7, and the position of the detection pen is fixed by the limiting block 2-2;

the detection pen moving device 3 is matched with the T-shaped groove 1-9 of the bottom plate 1-1 through the bottom boss 3-1, and the screw rod 3-2 and the T-shaped nut slide left and right at the T-shaped groove 1-9, so that the aim of detecting the transverse movement of the pen is fulfilled; the outer circle 3-3 of the mobile device is assembled with the clamping position 2-8 of the detection device, and the screw rod 2-9 is matched with the groove 3-4 of the outer circle of the mobile device to perform vertical direction and angular direction positioning;

in the embodiment, the verticality of the central line of the conical surface 2-3 of the positioning block is 0.02B, the coaxiality of a top circle and a bottom circle is 0.02A, the diameter phi of the top circle is 22mm, the diameter phi of the bottom circle is 20.44, and the angle of the conical surface is 87.74 degrees; the verticality of the central line of the conical surface 2-4 of the limiting block is 0.02B, the coaxiality of a top circle and a bottom circle is 0.02A, the diameter phi of the top circle is 20mm, the diameter phi of the bottom circle is 21.33, and the angle of the conical surface is 91.81 degrees; the spacing between the bottom hole part and the thread part of the locking position of the locking bolt 2-7 of the limiting block is 2mm, and the pin rod 2-6 is clamped through the thread locking force and the gap.

Referring to fig. 1, the method for using the auxiliary tool for detecting the surface hardness of the crank journal according to the above embodiment includes the following steps:

(1) Wiping the V-shaped block, the outer circular surface of the crankshaft journal and the detecting pen point by using dust-free paper until the pen point is clean and free of stains;

(2) Adjusting the limiting block to the top, enabling an ultrasonic sclerometer detection pen to pass through the limiting block and the positioning block, and placing an ultrasonic sclerometer body in a sclerometer placing area;

(3) The positioning block is kept motionless, the limiting block is pressed to the lowest immovable position, and the limiting block is locked;

(4) Moving the detecting pen mounting device to the top and locking, and placing the crankshaft on the V-shaped block;

(5) The detection pen is moved to a detection position by moving the detection pen moving device, and is locked, and a bolt for assembling the detection pen mounting device and the detection pen moving device is loosened until the detection pen mounting device can move up and down under the condition that a detection person can exert light force;

(6) The detection personnel applies force to the detection pen to detect the surface hardness of the crankshaft journal;

(7) Moving the detection pen mounting device to the top, locking, loosening the bolt of the detection pen moving device, and repeating the steps (5) and (6);

(8) After the detection is completed, the detection pen mounting device is moved to the top and locked, and the crankshaft is moved away from the V-shaped block.

Claims (1)

1. An auxiliary tool for detecting the surface hardness of a crankshaft journal is characterized in that: including strutting arrangement, fix detection pen installation device and detection pen mobile device on strutting arrangement, wherein:

the supporting device consists of a bottom plate, a V-shaped block and a hardness meter placing area, wherein the bottom plate and the V-shaped block pass through a strip counter bore device to fix the position of the V-shaped block and support a crankshaft, so that the crankshaft positioning and the crankshaft rotation are not influenced in the detection process, the hardness meter placing area consists of a hardness meter placing bracket and a connecting block, the connecting block is connected with the bottom plate, and the connecting block is used for adjusting the angle of the hardness meter placing bracket, so that the detection personnel can conveniently conduct reading operation;

the detection pen mounting device consists of a positioning block and a limiting block, wherein the positioning block is attached to the lower half conical surface of the detection pen through the conical surface, so that the position of the detection pen is positioned; the limiting block is attached to the upper half conical surface of the detection pen through a conical surface opposite to the positioning block, a clearance gap is formed at the same time, the wiring position of the detection pen is avoided in the assembly process, the positioning block is connected with the limiting block through a pin rod, the positioning block is in interference fit with the pin rod, the limiting block is in clearance fit with the pin rod and locked through a bolt, and the position of the detection pen is fixed through the limiting block;

the detection pen moving device is matched with the T-shaped groove of the bottom plate of the supporting device through the bottom boss, and the screw rod and the T-shaped nut slide left and right along the T-shaped groove, so that the purpose of detecting the transverse movement of the pen is achieved, the outer circle of the moving device is assembled with the clamping position of the detection device, and the screw rod is matched with the groove of the outer circle of the moving device to perform vertical direction and angular positioning.