CN111855193A - Tooth strength detector for transmission gear - Google Patents

Abstract

The invention relates to the technical field of gear detection, in particular to a tooth strength detector for a transmission gear, which comprises a base, wherein a mounting disc is fixedly arranged on the front side of the upper end of the base and is connected with a bottom plate above the mounting disc through a plurality of stand columns, a bulge with a semicircular structure is arranged on the upper end of the bottom plate along the edge of the upper end of the bottom plate, and a space surrounded by the bulge forms a placing groove with an opening at the front end; the lower end of the bottom plate is fixedly provided with a motor, the motor is connected with a rotating shaft through a transmission assembly, and the rotating shaft penetrates through the bottom plate, extends into the placing groove and is coaxially arranged with the installing groove; the mounting and dismounting of the gear to be tested can be simple and convenient by the aid of the third hydraulic cylinder and the mounting groove matched with the pressure head, manual operation intensity is greatly reduced, and detection and maintenance efficiency is improved.

Description

Tooth strength detector for transmission gear

Technical Field

The invention relates to the technical field of gear detection, in particular to a tooth strength detector for a transmission gear.

Background

The gear teeth are common accessories, and the performance of the gear is determined by the strength of the gear, particularly the torque force borne by the gear during working; therefore, in actual production, it is often necessary to test the strength of the gear in order to adapt the gear to different applications; the existing gear strength testing method generally adopts pressure to test the strength of the gear.

Through retrieval, the Chinese patent application No. 2019202142772 discloses an output gear strength detection tool with internal teeth, which comprises an L-shaped rack, wherein a vertical plate of the rack is provided with a mounting groove, a gear fixing block is fixed in the mounting groove, the side wall of an inner ring of the gear fixing block is provided with a plurality of second tooth grooves meshed with a gear to be detected, the outer circumference of the gear is provided with a plurality of first tooth grooves and first teeth, the first teeth on the left side of the gear are meshed in the second tooth grooves, and the first teeth on the right side of the gear are positioned outside the gear fixing block; a driving motor is installed on a horizontal plate of the rack, and an output shaft of the driving motor is meshed and connected with the rack assembly through a speed reducer; the rack assembly comprises a rack, a transmission shaft and a pull ring, the transmission shaft is connected with the speed reducer, detection teeth made of hard alloy materials are arranged on the left side of the rack, and the detection teeth are meshed and connected with a first tooth socket of the gear; a tension meter is fixed above the rack, and a drag hook of the tension meter is connected with the pull ring. The gear strength detection device in the above patent has the following disadvantages: 1. the limiting cover is inconvenient to install and disassemble, so that the gear is inconvenient to install and disassemble, the manual operation intensity is greatly improved, and the detection and maintenance efficiency is reduced; 2. the height of the limiting cover is fixed, and when the thickness of the gear is different, the limiting cover is difficult to fix the gear, so that the gear is likely to shake in the axial direction during detection, and the detection accuracy is affected; 3. the detection tooth position of rack is fixed in the front and back direction, and when the thickness of gear is different, detects tooth and can not in time the centering for the teeth of a cogwheel of gear are being close to the atress that detects tooth one side too big and appear the crack more easily or burst, influence the accuracy that detects.

Therefore, the tooth strength detector for the transmission gear is designed, the mounting and dismounting of the gear to be detected can be simple and convenient through the third hydraulic cylinder and the arrangement groove for matching the pressure head with the pressure head, the manual operation strength is greatly reduced, and the detection and maintenance efficiency is improved.

Disclosure of Invention

In order to make up for the defects of the prior art and solve the problems that the existing gear strength detection tool is inconvenient in gear installation and disassembly, so that the manual operation strength is greatly improved, and the detection and maintenance efficiency is reduced, the invention provides the gear strength detector for the transmission gear.

The technical scheme adopted by the invention for solving the technical problems is as follows: a tooth strength detector for a transmission gear comprises a base, wherein a mounting disc is fixedly arranged on the front side of the upper end of the base and is connected with a base plate above the base through a plurality of stand columns, a bulge of a semicircular structure is arranged on the upper end of the base plate along the edge of the upper end of the base plate, and a space defined by the bulge forms a placing groove with an opening at the front end; the lower end of the bottom plate is fixedly provided with a motor, the motor is connected with a rotating shaft through a transmission assembly, and the rotating shaft penetrates through the bottom plate, extends into the placing groove and is coaxially arranged with the installing groove; a mounting rack is arranged between the bulges at the two sides of the opening at the front end of the placing groove, and the distance from the lower end surface of the mounting rack to the upper end surface of the bottom plate is greater than the thickness of the gear to be measured; the mounting rack is provided with a matched arc-shaped groove towards one side of the placing groove, and the placing groove and the arc-shaped groove jointly form a space for accommodating the gear to be tested; the front end of the mounting frame is fixedly provided with a digital display type torque sensor, the lower end of the digital display type torque sensor is provided with a rotating head fixedly connected with the input end, the rotating head is detachably connected with a torsion bar, the torsion bar is arranged along the front-back direction, and the end part of the torsion bar extends to the arc-shaped groove and is positioned between the teeth to be measured of the gear to be measured; the base upper end rear side is fixed and is provided with the mounting disc riser, the riser upper end is provided with the diaphragm that extends forward, the diaphragm lower extreme is connected with the connecting plate through a plurality of third pneumatic cylinders, the fixed pressure head that matches with the gear size that awaits measuring that is provided with of connecting plate lower extreme.

When the gear to be tested is used, the gear to be tested is placed in the placing groove and sleeved outside the rotating shaft, the rotating shaft is connected with the gear to be tested through the flat key, and the gear to be tested is prevented from moving in the horizontal direction; then, the third hydraulic cylinder drives the connecting plate and the pressure head to move downwards until the gear to be tested is pressed on the upper end surface of the bottom plate, the torsion bar is installed on the torsion head, the end part of the torsion bar extends to the position of the arc-shaped groove and is positioned on the gear tooth to be tested of the gear to be tested, the rotating shaft is driven to rotate by the motor at the moment, the motor gives rotating force to the rotating shaft and the gear to be tested, so that interaction force is generated between the gear tooth to be tested of the gear to be tested and the end part of the torsion bar, the gear to be tested is subjected to twisting deformation under the rotating force of the motor and the resistance of the torsion bar, and in the process, the torsion bar transmits torsion force; through the third pneumatic cylinder and the arrangement groove that pressure head and pressure head match can make the installation of the gear that awaits measuring dismantle and become simple and convenient, make manual operation intensity reduce by a wide margin, improve detection and maintenance efficiency.

Preferably, the projections on both sides of the opening at the front end of the placing groove are symmetrically provided with vertically arranged linear guide rails, and the mounting frame is correspondingly provided with sliding chutes matched with the linear guide rails and can freely move along the arrangement direction of the linear guide rails; the lower end of the bottom plate is provided with a first hydraulic cylinder, and the first hydraulic cylinder is connected with the bottom of the mounting frame through an L-shaped connecting rod. Because the gear that awaits measuring of different thickness is putting the inslot back, the position of its vertical center can be different when the gear bottom surface that awaits measuring contacts with the bottom plate up end, if the position of torsion bar is fixed unchangeably will lead to the gear teeth that await measuring of gear to appear the crack more easily or break up in the atress of the one side that is blockked by the torsion bar, influence the accuracy that detects, consequently, can adjust the height of torsion bar through first pneumatic cylinder and connecting rod, and then realize the centering of torsion bar and the gear teeth that await measuring, improve the accuracy that detects.

Preferably, the mounting frame is made of angle steel consisting of a horizontal part and a vertical part, a sliding groove matched with the linear guide rail is arranged on the horizontal part of the mounting frame, and the torsion bar extends to the arc-shaped groove from the lower part of the horizontal part of the mounting frame; and a digital display type torque sensor is fixedly arranged at the front end of the vertical part of the mounting frame. The horizontal part of the angle steel can reserve space for the arc-shaped groove and the sliding groove, and the lower end of the horizontal part can limit the torsion bar, so that the torsion bar is prevented from being deformed upwards on the gear teeth to be detected, the gear teeth to be detected are only subjected to torsional force, the purpose of denoising is achieved, and the accuracy of detection is improved; meanwhile, the vertical part of the angle steel can avoid splashes generated in the detection process, the digital display type torque sensor and surrounding operators are protected, and the safety is improved.

Preferably, the lower end of the pressure head is provided with an avoiding hole, and the avoiding hole is arranged right opposite to the rotating shaft. Because the height of the rotating shaft in the arranging groove is unchanged, when the thickness of the gear to be tested is small, the pressure head can be directly pressed on the rotating shaft, the damage of the rotating shaft caused by the fact that the pressure head directly extrudes the rotating shaft can be avoided through the arrangement of the avoiding groove, the pressure head can smoothly press the gear to be tested to the upper end face of the bottom plate, the influence on the accuracy caused by the up-and-down action of the gear to be tested during detection is avoided, and meanwhile, the centering adjustment of a subsequent torsion bar is facilitated.

Preferably, a sunk groove is formed in the bulge on one side of the opening of the placing groove, a second hydraulic cylinder is fixedly arranged in the sunk groove, and a piston rod of the second hydraulic cylinder is arranged upwards and can be completely retracted into the sunk groove when being compressed; a pressing rod matched with the second hydraulic cylinder is correspondingly arranged on the pressing head; the rodless cavity of the second hydraulic cylinder is communicated with the rodless cavity of the first piston rod through a protrusion and a communication channel in the bottom plate, and the sectional area of the rodless cavity of the first hydraulic cylinder is twice of that of the rodless cavity of the second hydraulic cylinder; the first hydraulic cylinder is sleeved with a spring, and two ends of the spring are fixedly connected with the connecting rods at the end parts of the bottom plate and the second hydraulic cylinder respectively. Through the setting of first pneumatic cylinder and second pneumatic cylinder, two gear thickness that await measuring are different in the back at present, if: under the condition that the former gear to be measured is centered, after the latter gear to be measured is put into the gear to be measured and is pressed down by the pressure head, the height difference between the latter gear to be measured and the former gear to be measured is the difference value of the descending distance of the pressure head, and is also equal to the difference value of the descending distance when the pressure rod presses down the second hydraulic cylinder, and because the sectional area of the rodless cavity of the first hydraulic cylinder is twice of the sectional area of the rodless cavity of the second hydraulic cylinder, the descending distance difference value of the first hydraulic cylinder is half of the descending distance difference value of the second hydraulic cylinder, namely the descending distance of the mounting frame and the torsion bar is half of the height difference between the front and the rear; the spring is arranged, so that on one hand, the descending trend of the first hydraulic cylinder can be slowed down when the pressure head is pressed down, the pressure head is buffered through the communicating channel and the second piston cylinder, and the damage caused by the impact of the pressure head on the gear to be tested is avoided; on the other hand, when the pressure head moves upwards, the spring can improve the reset power, realize quick separation, improve the detection efficiency and reduce the energy consumption of the third hydraulic cylinder.

Preferably, a plurality of groups of heating wires which are arranged in an S shape are arranged in the arc-shaped groove, and the heating wires are electrically connected with an external power supply through a control switch. The gear teeth to be detected of the gear to be detected can be heated through the arrangement of the heating wires, the working environment of high temperature after the gear to be detected works for a long time is simulated, and the detection accuracy is improved.

The invention has the following beneficial effects:

1. according to the tooth strength detector for the transmission gear, the third hydraulic cylinder and the arrangement groove matched with the pressure head enable the mounting and dismounting of the gear to be detected to be simple and convenient, the manual operation strength is greatly reduced, and the detection and maintenance efficiency is improved.

2. According to the tooth strength detector for the transmission gear, the torsion bar and the gear to be detected can be automatically centered through the arrangement of the first air cylinder and the second air cylinder, and the problem that detection accuracy is affected due to different thicknesses of the gear is solved.

Drawings

The invention will be further explained with reference to the drawings.

FIG. 1 is a perspective view of one aspect of the present invention;

FIG. 2 is a perspective view of another aspect of the present invention;

FIG. 3 is an enlarged view of a portion of FIG. 2 at A;

FIG. 4 is a sectional view of the present invention at the placement groove;

FIG. 5 is a cross-sectional view of the present invention at a third cylinder;

FIG. 6 is a rear view of the mounting bracket of the present invention;

in the figure:

1. a base; 2. mounting a disc; 21. a column; 22. a base plate; 23. a protrusion; 24. a placement groove; 25. a linear guide rail; 26. a motor; 27. a rotating shaft; 3. a mounting frame; 31. a digital display torque sensor; 32. a torsion bar; 33. rotating the head; 34. a connecting rod; 35. a spring; 36. a first hydraulic cylinder; 37. an arc-shaped slot; 38. a second hydraulic cylinder; 39. a communication channel; 4. a gear to be tested; 41. gear teeth to be detected; 5. a vertical plate; 51. a transverse plate; 52. a third hydraulic cylinder; 53. a connecting plate; 54. a pressure head; 55. avoiding holes; 56. a pressure lever; 6. a heating wire.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.

As shown in fig. 1 to 6, a tooth strength detector for a transmission gear comprises a base 1, wherein a mounting plate 2 is fixedly arranged on the front side of the upper end of the base 1, the mounting plate 2 is connected with a base plate 22 above the mounting plate through a plurality of upright posts 21, a protrusion 23 with a semicircular structure is arranged on the upper end of the base plate 22 along the edge of the base plate, and a space surrounded by the protrusion 23 forms a placing groove 24 with an opening at the front end; the lower end of the bottom plate 22 is fixedly provided with a motor 26, the motor 26 is connected with a rotating shaft 27 through a transmission assembly, and the rotating shaft 27 penetrates through the bottom plate 22 to extend into the placing groove 24 and is coaxially arranged with the installing groove; the mounting frame 3 is arranged between the bulges 23 at the two sides of the opening at the front end of the placing groove 24, and the distance from the lower end surface of the mounting frame 3 to the upper end surface of the bottom plate 22 is greater than the thickness of the gear 4 to be measured; a matched arc-shaped groove 37 is formed in one side, facing the placing groove, of the mounting rack 3, and the placing groove 24 and the arc-shaped groove 37 jointly form a space for accommodating the gear 4 to be tested; a digital display type torque sensor 31 is fixedly arranged at the front end of the mounting frame 3, a rotating head 33 fixedly connected with an input end is arranged at the lower end of the digital display type torque sensor 31, a torsion bar 32 is detachably connected to the rotating head 33, the torsion bar 32 is arranged along the front-back direction, and the end part of the torsion bar 32 extends to an arc-shaped groove 37 and is positioned between gear teeth 41 to be measured of the gear 4 to be measured; the rear side of the upper end of the base 1 is fixedly provided with a vertical plate 5 of the mounting plate 2, the upper end of the vertical plate 5 is provided with a transverse plate 51 extending forwards, the lower end of the transverse plate 51 is connected with a connecting plate 53 through a plurality of third hydraulic cylinders 52, and the lower end of the connecting plate 53 is fixedly provided with a pressure head 54 matched with the size of the gear 4 to be measured.

When the device is used, the gear 4 to be tested is placed in the placing groove 24 and sleeved outside the rotating shaft 27, the rotating shaft 27 is connected with the gear 4 to be tested through the flat key, and the gear 4 to be tested is prevented from moving in the horizontal direction; then, the third hydraulic cylinder 52 drives the connecting plate 53 and the pressure head 54 to move downwards until the gear 4 to be tested is pressed on the upper end surface of the bottom plate 22, then the torsion bar 32 is installed on the torsion head, the end part of the torsion bar 32 extends to the arc-shaped groove 37 and is positioned on the gear tooth 41 to be tested of the gear 4 to be tested, at this time, the motor 26 drives the rotating shaft 27 to rotate, the motor 26 gives rotating force to the rotating shaft 27 and the gear 4 to be tested, so that an interaction force is generated between the gear tooth 41 to be tested of the gear 4 to be tested and the end part of the torsion bar 32, the gear 4 to be tested is twisted and deformed under the rotating force of the motor 26 and the resistance of the torsion bar 32, in the process, the torsion bar 32 transmits torsion force to the torsion sensor through the rotating; through the arrangement groove that third pneumatic cylinder 52 and pressure head 54 match can make the installation of gear 4 that awaits measuring dismantle and become simple and convenient, make manual operation intensity reduce by a wide margin, improved detection and maintenance efficiency.

As an embodiment of the present invention, the protrusions 23 on both sides of the front opening of the placing groove 24 are symmetrically provided with vertically arranged linear guide rails 25, and the mounting frame 3 is correspondingly provided with sliding grooves matched with the linear guide rails 25 and can freely move along the arrangement direction of the linear guide rails 25; the lower end of the bottom plate 22 is provided with a first hydraulic cylinder 36, and the first hydraulic cylinder 36 is connected with the bottom of the mounting frame 3 through an L-shaped connecting rod 34. After the gears 4 to be detected with different thicknesses are placed in the placement grooves, the positions of the vertical centers of the gears 4 to be detected are different when the bottom surfaces of the gears 4 to be detected are in contact with the upper end surface of the bottom plate 22, if the position of the torsion bar 32 is fixed, the gear teeth 41 to be detected of the gears 4 to be detected are stressed too much on the side blocked by the torsion bar 32, so that cracks or breakages are prone to occurring, the detection accuracy is affected, therefore, the height of the torsion bar 32 can be adjusted through the first hydraulic cylinder 36 and the connecting rod 34, the torsion bar 32 and the gear teeth 41 to be detected are centered, and the detection accuracy is improved.

As an embodiment of the present invention, the mounting frame 3 is made of angle steel composed of a horizontal part and a vertical part, a sliding groove matched with the linear guide rail 25 is arranged on the horizontal part of the mounting frame 3, and the torsion bar 32 extends from below the horizontal part of the mounting frame 3 to the arc-shaped groove 37; and a digital display type torque sensor 31 is fixedly arranged at the front end of the vertical part of the mounting frame 3. The horizontal part of the angle steel can reserve space for the arc-shaped groove 37 and the sliding groove, and the lower end of the horizontal part can limit the torsion bar 32, so that the torsion bar is prevented from being deformed upwards on the gear teeth 41 to be detected, the gear teeth 41 to be detected are only subjected to torsional force, the purpose of denoising is achieved, and the detection accuracy is improved; meanwhile, the vertical part of the angle steel can avoid splashes generated in the detection process, the digital display type torque sensor 31 and surrounding operators are protected, and the safety is improved.

As an embodiment of the present invention, the lower end of the pressing head 54 is provided with an avoiding hole 55, and the avoiding hole 55 is disposed opposite to the rotating shaft 27. Because the height of the rotating shaft 27 in the placing groove is not changed, when the thickness of the gear 4 to be tested is small, the pressure head 54 can be directly pressed on the rotating shaft 27, so that the damage of the rotating shaft 27 caused by the fact that the pressure head 54 directly extrudes the rotating shaft 27 can be avoided through the arrangement of the avoiding groove, the pressure head 54 can smoothly press the gear 4 to be tested to the upper end surface of the bottom plate 22, the influence on the accuracy of the up-and-down action of the gear 4 to be tested during detection is avoided, and meanwhile, the centering adjustment of the subsequent torsion bar 32 is facilitated.

As an embodiment of the present invention, a sunken groove is arranged in the protrusion 23 on the opening side of the placing groove 24, a second hydraulic cylinder 38 is fixedly arranged in the sunken groove, and a piston rod of the second hydraulic cylinder 38 is arranged upward and can be completely retracted into the sunken groove when being compressed; a press rod 56 matched with the second hydraulic cylinder 38 is correspondingly arranged on the press head 54; the rodless cavity of the second hydraulic cylinder 38 is communicated with the rodless cavity of the first piston rod through a bulge 23 and a communication channel 39 in the bottom plate 22, and the sectional area of the rodless cavity of the first hydraulic cylinder 36 is twice as large as that of the rodless cavity of the second hydraulic cylinder 38; the first hydraulic cylinder 36 is sleeved with a spring 35, and two ends of the spring 35 are respectively and fixedly connected with the connecting rod 34 at the end parts of the bottom plate 22 and the second hydraulic cylinder 38. Through the setting of first pneumatic cylinder 36 and second pneumatic cylinder 38, two gear 4 thickness that await measuring are different at present back, if: under the condition that the previous gear 4 to be measured is centered, after the next gear 4 to be measured is put into the gear 4 to be measured and is pressed down by the pressing head 54, the height difference between the gear 4 to be measured and the previous gear 4 to be measured is the difference of the descending distance of the pressing head 54, and is also equal to the difference of the descending distance of the pressing rod 56 for pressing down the second hydraulic cylinder 38, and because the sectional area of the rodless cavity of the first hydraulic cylinder 36 is twice of the sectional area of the rodless cavity of the second hydraulic cylinder 38, the descending distance difference of the first hydraulic cylinder 36 is half of the descending distance difference of the second hydraulic cylinder 38, namely, the descending distance of the mounting frame 3 and the torsion bar 32 is half of the height difference of the front and back two gears 4 to be; the spring 35 is arranged, so that on one hand, the descending trend of the first hydraulic cylinder 36 can be slowed down when the pressure head 54 is pressed down, and then the pressure head 54 is buffered through the communicating channel 39 and the second piston cylinder, and the damage caused by the impact of the pressure head 54 on the gear 4 to be detected is avoided; on the other hand, when the ram 54 moves upward, the spring 35 can also increase the power of return, so as to realize quick disengagement, improve the detection efficiency, and reduce the energy consumption of the third hydraulic cylinder 52.

As an embodiment of the present invention, a plurality of S-shaped heating wires are disposed in the arc-shaped groove 37, and the heating wires are electrically connected to an external power source through a control switch. The gear teeth 41 to be detected of the gear 4 to be detected can be heated through the arrangement of the heating wires, the working environment of high temperature after the gear 4 to be detected works for a long time is simulated, and the detection accuracy is improved.

When the device is used, the gear 4 to be tested is placed in the placing groove 24 and sleeved outside the rotating shaft 27, the rotating shaft 27 is connected with the gear 4 to be tested through the flat key, and the gear 4 to be tested is prevented from moving in the horizontal direction; then, the third hydraulic cylinder 52 drives the connecting plate 53 and the pressure head 54 to move downwards until the gear 4 to be tested is pressed on the upper end surface of the bottom plate 22, then the torsion bar 32 is installed on the torsion head, the end part of the torsion bar 32 extends to the arc-shaped groove 37 and is positioned on the gear tooth 41 to be tested of the gear 4 to be tested, at this time, the motor 26 drives the rotating shaft 27 to rotate, the motor 26 gives rotating force to the rotating shaft 27 and the gear 4 to be tested, so that an interaction force is generated between the gear tooth 41 to be tested of the gear 4 to be tested and the end part of the torsion bar 32, the gear 4 to be tested is twisted and deformed under the rotating force of the motor 26 and the resistance of the torsion bar 32, in the process, the torsion bar 32 transmits torsion force to the torsion sensor through the rotating; the third hydraulic cylinder 52 and the arrangement groove of the pressure head 54 matched with the pressure head 54 can make the installation and the disassembly of the gear 4 to be detected simple and convenient, greatly reduce the manual operation intensity and improve the detection and maintenance efficiency; after the gears 4 to be detected with different thicknesses are placed in the placement grooves, the positions of the vertical centers of the gears 4 to be detected are different when the bottom surfaces of the gears 4 to be detected are in contact with the upper end surface of the bottom plate 22, if the position of the torsion bar 32 is fixed, the gear teeth 41 to be detected of the gears 4 to be detected are stressed too much on the side blocked by the torsion bar 32, so that cracks or breakages are more likely to occur, and the detection accuracy is affected, therefore, the height of the torsion bar 32 can be adjusted through the first hydraulic cylinder 36 and the connecting rod 34, the centering of the torsion bar 32 and the gear teeth 41 to be detected is further realized, and the detection accuracy is improved; the horizontal part of the angle steel can reserve space for the arc-shaped groove 37 and the sliding groove, and the lower end of the horizontal part can limit the torsion bar 32, so that the torsion bar is prevented from being deformed upwards on the gear teeth 41 to be detected, the gear teeth 41 to be detected are only subjected to torsional force, the purpose of denoising is achieved, and the detection accuracy is improved; meanwhile, the vertical part of the angle steel can avoid the generation of splashes in the detection process, protect the digital display torque sensor 31 and surrounding operators, and improve the safety; because the height of the rotating shaft 27 in the placing groove is not changed, when the thickness of the gear 4 to be tested is smaller, the pressure head 54 may be directly pressed on the rotating shaft 27, so that the damage of the rotating shaft 27 caused by the fact that the pressure head 54 directly presses the rotating shaft 27 can be avoided through the arrangement of the avoiding groove, the gear 4 to be tested can be smoothly pressed on the upper end surface of the bottom plate 22 through the pressure head 54, the influence on the accuracy caused by the up-and-down action of the gear 4 to be tested during detection is avoided, and meanwhile, the centering adjustment of the subsequent torsion bar 32 is facilitated; through the setting of first pneumatic cylinder 36 and second pneumatic cylinder 38, two gear 4 thickness that await measuring are different at present back, if: under the condition that the previous gear 4 to be measured is centered, after the next gear 4 to be measured is put into the gear 4 to be measured and is pressed down by the pressing head 54, the height difference between the gear 4 to be measured and the previous gear 4 to be measured is the difference of the descending distance of the pressing head 54, and is also equal to the difference of the descending distance of the pressing rod 56 for pressing down the second hydraulic cylinder 38, and because the sectional area of the rodless cavity of the first hydraulic cylinder 36 is twice of the sectional area of the rodless cavity of the second hydraulic cylinder 38, the descending distance difference of the first hydraulic cylinder 36 is half of the descending distance difference of the second hydraulic cylinder 38, namely, the descending distance of the mounting frame 3 and the torsion bar 32 is half of the height difference of the front and back two gears 4 to be; the spring 35 is arranged, so that on one hand, the descending trend of the first hydraulic cylinder 36 can be slowed down when the pressure head 54 is pressed down, and then the pressure head 54 is buffered through the communicating channel 39 and the second piston cylinder, and the damage caused by the impact of the pressure head 54 on the gear 4 to be detected is avoided; on the other hand, when the pressure head 54 moves upwards, the spring 35 can also improve the power of resetting, realize quick separation, improve the detection efficiency and simultaneously reduce the energy consumption of the third hydraulic cylinder 52; the gear teeth 41 to be detected of the gear 4 to be detected can be heated through the arrangement of the heating wires, the working environment of high temperature after the gear 4 to be detected works for a long time is simulated, and the detection accuracy is improved.

The foregoing illustrates and describes the principles, general features, and advantages of the present invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims (6)

1. The tooth strength detector for the transmission gear is characterized by comprising a base (1), wherein a mounting disc (2) is fixedly arranged on the front side of the upper end of the base (1), the mounting disc (2) is connected with a bottom plate (22) above the mounting disc through a plurality of stand columns (21), a protrusion (23) with a semicircular annular structure is arranged on the upper end of the bottom plate (22) along the edge of the bottom plate, and a space surrounded by the protrusion (23) forms a placing groove (24) with an opening at the front end; the lower end of the bottom plate (22) is fixedly provided with a motor (26), the motor (26) is connected with a rotating shaft (27) through a transmission assembly, and the rotating shaft (27) penetrates through the bottom plate (22) to extend into the placing groove (24) and is coaxially arranged with the installing groove; an installation rack (3) is arranged between the bulges (23) on the two sides of the front end opening of the placement groove (24), and the distance from the lower end surface of the installation rack (3) to the upper end surface of the bottom plate (22) is greater than the thickness of the gear (4) to be measured; a matched arc-shaped groove (37) is formed in one side, facing the placing groove, of the mounting rack (3), and the placing groove (24) and the arc-shaped groove (37) jointly form a space for accommodating the gear (4) to be tested; the front end of the mounting frame (3) is fixedly provided with a digital display type torque sensor (31), the lower end of the digital display type torque sensor (31) is provided with a rotating head (33) fixedly connected with an input end, a torsion bar (32) is detachably connected to the rotating head (33), the torsion bar (32) is arranged along the front-back direction, and the end part of the torsion bar (32) extends to the arc-shaped groove (37) and is positioned between gear teeth (41) to be measured of the gear (4) to be measured; the gear testing fixture is characterized in that a mounting plate (2) vertical plate (5) is fixedly arranged on the rear side of the upper end of the base (1), a transverse plate (51) extending forwards is arranged on the upper end of the vertical plate (5), the lower end of the transverse plate (51) is connected with a connecting plate (53) through a plurality of third hydraulic cylinders (52), and a pressure head (54) matched with the gear (4) to be tested in size is fixedly arranged at the lower end of the connecting plate (53).

2. The tooth strength detector for the transmission gear according to claim 1, characterized in that the projections (23) on both sides of the front opening of the placing groove (24) are symmetrically provided with vertically arranged linear guide rails (25), the mounting bracket (3) is correspondingly provided with a sliding groove matched with the linear guide rails (25) and can freely move along the arrangement direction of the linear guide rails (25); the lower end of the bottom plate (22) is provided with a first hydraulic cylinder (36), and the first hydraulic cylinder (36) is connected with the bottom of the mounting frame (3) through an L-shaped connecting rod (34).

3. The tooth strength detector for the transmission gear according to claim 2, characterized in that the mounting frame (3) is made of angle steel composed of a horizontal part and a vertical part, a sliding groove matched with the linear guide rail (25) is arranged on the horizontal part of the mounting frame (3), and the torsion bar (32) extends from the lower part of the horizontal part of the mounting frame (3) to the arc-shaped groove (37); and a digital display type torque sensor (31) is fixedly arranged at the front end of the vertical part of the mounting rack (3).

4. The tooth strength detector for the transmission gear according to claim 3, characterized in that the lower end of the pressure head (54) is provided with an avoiding hole (55), and the avoiding hole (55) is arranged over against the rotating shaft (27).

5. The tooth strength detector for the transmission gear according to claim 4, characterized in that a sunken groove is arranged in the protrusion (23) on the opening side of the placing groove (24), a second hydraulic cylinder (38) is fixedly arranged in the sunken groove, and a piston rod of the second hydraulic cylinder (38) is arranged upward and can be completely retracted into the sunken groove when being compressed; a press rod (56) matched with the second hydraulic cylinder (38) is correspondingly arranged on the press head (54); the rodless cavity of the second hydraulic cylinder (38) is communicated with the rodless cavity of the first piston rod through a bulge (23) and a communication channel (39) in the bottom plate (22), and the sectional area of the rodless cavity of the first hydraulic cylinder (36) is twice of that of the rodless cavity of the second hydraulic cylinder (38); and a spring (35) is sleeved outside the first hydraulic cylinder (36), and two ends of the spring (35) are respectively and fixedly connected with the connecting rod (34) at the end parts of the bottom plate (22) and the second hydraulic cylinder (38).

6. The tooth strength detector for the transmission gear according to claim 5, characterized in that a plurality of groups of heating wires arranged in an S shape are arranged in the arc-shaped groove (37), and the heating wires are electrically connected with an external power supply through a control switch.

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