CN113043168A - Crankshaft journal grinding size measuring device - Google Patents
Crankshaft journal grinding size measuring device Download PDFInfo
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- CN113043168A CN113043168A CN202110271391.0A CN202110271391A CN113043168A CN 113043168 A CN113043168 A CN 113043168A CN 202110271391 A CN202110271391 A CN 202110271391A CN 113043168 A CN113043168 A CN 113043168A
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- grinding
- contact
- crankshaft journal
- movable contact
- dial indicator
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B49/00—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation
- B24B49/02—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent
- B24B49/04—Measuring or gauging equipment for controlling the feed movement of the grinding tool or work; Arrangements of indicating or measuring equipment, e.g. for indicating the start of the grinding operation according to the instantaneous size and required size of the workpiece acted upon, the measuring or gauging being continuous or intermittent involving measurement of the workpiece at the place of grinding during grinding operation
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B24—GRINDING; POLISHING
- B24B—MACHINES, DEVICES, OR PROCESSES FOR GRINDING OR POLISHING; DRESSING OR CONDITIONING OF ABRADING SURFACES; FEEDING OF GRINDING, POLISHING, OR LAPPING AGENTS
- B24B55/00—Safety devices for grinding or polishing machines; Accessories fitted to grinding or polishing machines for keeping tools or parts of the machine in good working condition
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- A Measuring Device Byusing Mechanical Method (AREA)
- Grinding Of Cylindrical And Plane Surfaces (AREA)
Abstract
The application relates to a crankshaft journal grinding dimension measuring device, which belongs to the technical field of crankshaft journal processing and comprises a dial indicator, a movable contact arranged on a probe of the dial indicator, a positioning mechanism connected with the dial indicator and an installation mechanism connected with the positioning mechanism; the mounting mechanism is used for mounting the dial indicator and the positioning mechanism on the grinding machine, the movable contact is connected in the positioning mechanism in a sliding mode, and the positioning mechanism is used for enabling the movable contact to be abutted to the cylindrical surface of the crankshaft journal in the grinding process. Through the size change that removes at bent axle journal grinding in-process mobile contact follows the bent axle journal to the removal distance that will remove the contact under the cooperation of amesdial shows, makes things convenient for the staff to survey the size change of bent axle journal in real time at the grinding bent axle in-process, need not to shut down repeatedly and carry out measurement work to the bent axle journal, has guaranteed under the prerequisite to bent axle grinding precision, has improved grinding efficiency.
Description
Technical Field
The application relates to the field of crankshaft journal processing, in particular to a crankshaft journal grinding size measuring device.
Background
At present, in the process of grinding a crankshaft journal on a grinding machine, in order to control whether the journal size is ground to the required size precision, a worker needs to repeatedly measure the journal size by using an outside micrometer, and the grinding action needs to be stopped during measurement, so that the defects of frequent measurement work and low grinding efficiency exist.
Disclosure of Invention
In order to monitor the size change of the crankshaft journal in the grinding process in real time, the grinding efficiency of the journal is improved on the premise of ensuring the grinding precision of the journal, and the application provides a crankshaft journal grinding size measuring device.
The application provides a crankshaft journal grinding size measuring device adopts following technical scheme:
a crankshaft journal grinding dimension measuring device comprises a dial indicator, a movable contact arranged on a probe of the dial indicator, a positioning mechanism connected with the dial indicator and a fixing mechanism connected with the positioning mechanism; the fixing mechanism is used for installing the dial indicator and the positioning mechanism on the grinding machine, the movable contact is connected in the positioning mechanism in a sliding mode, and the positioning mechanism is used for enabling the movable contact to be abutted to the cylindrical surface of the crankshaft journal in the grinding process.
Through adopting above-mentioned technical scheme, carry out the in-process of grinding to the bent axle journal at the grinding machine, use positioning mechanism with on the face of cylinder of moving contact butt bent axle journal, in bent axle journal grinding process, the size of main shaft journal diminishes gradually, moving contact follows bent axle journal radius change and removes under positioning mechanism's effect, the probe of amesdial is followed and is moved moving contact, make the pointer of amesdial rotate, the staff can remove the change of coming real-time observation bent axle journal grinding in-process size through the pointer of amesdial, conveniently control the grinding size of bent axle journal, need not to shut down repeatedly and measure the size of bent axle journal, guarantee under the prerequisite of bent axle journal grinding precision, the grinding efficiency to the bent axle journal is improved.
Optionally, the positioning mechanism includes a mounting plate and two positioning contacts fixed on the mounting plate, the casing of the dial indicator is fixedly connected with the mounting plate, and the movable contact is slidably connected to the mounting plate; set up the caulking groove that can supply the bent axle journal to get into on the mounting panel, the one end that the amesdial was kept away from to the removal contact extends to the caulking groove in, the one end of two location contacts also all extends to the caulking groove in, and the projection of the tip that removal contact and two location contacts are located the caulking groove on the plumb plane is not located same straight line.
Through adopting above-mentioned technical scheme, under the principle that three point that does not lie in same straight line can fix a position out only one circle, make movable contact and two location contact lie in the inboard tip of caulking groove can the butt simultaneously on the face of cylinder of a cylinder, and because movable contact can remove, the diameter of the cylinder that the three can fix a position just also can change. During the use, stretch into the caulking groove with the one side that the emery wheel was kept away from to the bent axle journal, make the tip of mobile contact and two location contacts all butt to the cylindrical surface of bent axle journal on, at bent axle journal grinding in-process, the mobile contact can follow the diminishing of bent axle journal size and remove, and the circle size that until mobile contact and two location contacts located is unanimous with the design size of bent axle journal. Because the positions of the two positioning contacts are unchanged relative to the mounting plate in the process of grinding the crankshaft journal, when the crankshaft journal is ground to the designed size, the relative positions of the movable contacts and the mounting plate are unique, namely the scale value pointed by the pointer of the dial indicator is also certain, and a worker can judge whether the crankshaft journal is ground to the designed size by observing whether the pointer moves to the scale, so that the grinding precision of the crankshaft journal is high.
Optionally, one of the positioning contacts is slidably connected to the mounting plate, so that the positioning contact can move to a side close to or far from the caulking groove, and a fixing member for fixing the position of the positioning contact on the mounting plate is arranged between the positioning contact and the mounting plate.
Through adopting above-mentioned technical scheme, the length that this gliding location contact stretches into the caulking groove is adjusted, adjusts mobile contact and two contact tip promptly in relative position, can adjust when the dial indicator points to corresponding scale, and the cylinder diameter that mobile contact and two contact tip were fixed a position makes positioning mechanism can be applicable to the bent axle journal of multiple not unidimensional, and the mounting then can guarantee at the grinding in-process, and this gliding location contact can not remove, ensures that the grinding precision of bent axle journal is better.
Optionally, the movable contact and one end of the two positioning contacts located in the caulking groove are both spherical.
By adopting the technical scheme, the spherical surface is in point contact with the cylindrical surface of the crankshaft journal, so that the contact area between the movable contact and the positioning contact and the crankshaft journal is reduced, the circles positioned by the movable contact and the positioning contact are more regular, the precision is higher, meanwhile, the friction force generated between the movable contact and the crankshaft journal is smaller, and the crankshaft journal is not easy to scratch.
Optionally, the positioning mechanism further comprises a fixing cylinder fixedly arranged on the mounting plate, one end of the fixing cylinder, which is far away from the mounting plate, is connected with the fixing mechanism, and the casing of the dial indicator is fixed on the outer side wall of the fixing cylinder; an extension rod is arranged in the fixed cylinder in a sleeved mode, the extension rod is connected with the fixed cylinder in a sliding mode, one end of the extension rod extends out of the fixed cylinder and abuts against a probe of the dial indicator, and the other end of the extension rod extends out of the fixed cylinder and is connected with the movable contact.
Through adopting above-mentioned technical scheme, the extension rod has prolonged the interval between amesdial and the removal contact, makes the amesdial far away from the position that the bent axle journal was ground by the emery wheel, and the difficult coolant liquid that is used by the grinding in-process sputters, guarantees the stability in use and the measurement accuracy of amesdial.
Optionally, a screw is fixedly arranged at one end of the movable contact close to the extension rod, and the screw is in threaded connection with the extension rod.
By adopting the technical scheme, the screw rod can move on the extension rod by rotating the movable contact, so that the function of adjusting the distance between the movable contact and the extension rod is realized, the extending length of the probe of the dial indicator when the movable contact is contacted with the journal of the crankshaft is adjusted, and the scale value pointed by the pointer of the dial indicator is adjusted; when the crankshaft journal is in the designed size, the pointer of the dial indicator points to the zero scale value, and when the pointer of the dial indicator points to the zero scale value, the crankshaft journal is ground to the designed size, so that the work of workers is facilitated.
Optionally, a spring is further disposed between the fixed cylinder and the extension rod, and the spring applies a pushing force to the extension rod toward the movable contact.
Through adopting above-mentioned technical scheme, the thrust that the spring applyed to the extension rod can ensure that extension rod and mobile contact can follow the change of crankshaft journal and remove when the crankshaft journal reduces, improves the measurement accuracy to crankshaft journal size.
Optionally, the fixing mechanism includes an installation rod hinged to the grinding machine and an installation shaft hinged to the installation rod, and one end of the installation shaft, which is far away from the installation rod, is connected to the positioning mechanism.
Through adopting above-mentioned technical scheme, installation pole and installation axle install positioning mechanism and the amesdial and the moving contact on the positioning mechanism on the grinding machine to through the rotation of installation pole on the grinding machine, positioning mechanism through the rotation between installation axle and the installation pole, make positioning mechanism can move on the grinding machine, make things convenient for the cooperation between positioning mechanism and the bent axle journal.
Optionally, the mounting rod is hinged to a grinding wheel housing of the grinding machine.
By adopting the technical scheme, the grinding wheel cover is arranged on the grinding wheel, so that the mounting rod is closest to the grinding wheel and can move along with the grinding wheel, the positions of the positioning mechanism, the movable contact and the dial indicator relative to the grinding wheel can be ensured, and the positions of the positioning mechanism and the movable contact relative to the crankshaft journal are correspondingly ensured when the grinding wheel grinds the crankshaft journal every time, so that the positioning mechanism and the movable contact can be matched with the journal of the crankshaft.
Optionally, a balancing weight is fixedly arranged at one end, away from the mounting shaft, of the mounting rod, a hinged point of the mounting rod and the grinding wheel cover is located between the balancing weight and the mounting shaft, and the torque generated by the gravity of the balancing weight on the mounting rod is larger than the torque generated by the gravity of the fixing mechanism, the dial indicator and the mounting shaft on the mounting rod.
Through adopting above-mentioned technical scheme, under the effect of gravity, the balancing weight has the trend that drives the installation pole and upwards rotate in positioning mechanism one side, measures the in-process of bent axle journal, and positioning mechanism and mobile contact cooperation make the installation pole unable rotation on the bent axle journal, to bent axle journal grinding completion back, take off positioning mechanism from the bent axle journal, the balancing weight drives the installation pole immediately and rotates positioning mechanism, mobile contact and amesdial to bent axle top to make things convenient for staff's installation and dismantlement to the bent axle.
In summary, the present application includes at least one of the following beneficial technical effects:
1. the movable contact moves along with the size change of the crankshaft journal in the grinding process of the crankshaft journal, and the moving distance of the movable contact is displayed under the cooperation of the dial indicator, so that a worker can conveniently observe the size change of the crankshaft journal in real time in the grinding process of the crankshaft, the crankshaft journal is not required to be stopped repeatedly to measure, and the grinding efficiency is improved on the premise of ensuring the grinding precision of the crankshaft;
2. under the principle that the movable contact and the two positioning contacts can position a single circle at three points which are not positioned on the same straight line, the movable contact is positioned in a state of abutting against the cylindrical surface of the crankshaft journal, and a worker can judge whether the crankshaft journal is ground to a designed size according to scales caused by a pointer of a dial indicator, so that the higher grinding precision of the crankshaft journal is ensured;
3. under the effect of extension rod, prolonged the position that the amesdial is ground by the emery wheel apart from the bent axle journal, make the coolant liquid that uses in the grinding process on the amesdial is difficult for splashing, guarantee the stability in use and the use precision of amesdial.
Drawings
FIG. 1 is a schematic diagram showing the structure of a measuring device mounted on a grinding wheel guard of a grinding machine according to an embodiment of the present application.
Fig. 2 is a partial view showing a positional relationship among the dial indicator, the positioning mechanism, and the movable contact.
Fig. 3 is a partial sectional view showing a positional relationship between a moving contact end and two positioning contacts.
Fig. 4 is a partial sectional view showing a connection relationship between the extension rod and the fixed cylinder.
Fig. 5 is a partial exploded view showing the connection relationship between the fixture and the mounting plate and the positioning contact.
Fig. 6 is a partial view showing the positioning mechanism driven by the weight block moving upward.
Description of reference numerals:
1. a dial indicator; 11. a movable contact; 111. a screw; 112. locking the nut; 2. a positioning mechanism; 21. mounting a plate; 211. caulking grooves; 212. a chute; 22. positioning a contact; 23. a fixing member; 231. a slider; 232. a bolt; 24. a fixed cylinder; 241. a guide cylinder; 242. a limiting ring; 25. an extension pole; 251. a limiting disc; 26. an installation table; 27. a spring; 3. a fixing mechanism; 31. mounting a rod; 32. installing a shaft; 33. and a balancing weight.
Detailed Description
The present application is described in further detail below with reference to figures 1-6.
The embodiment of the application discloses crankshaft journal grinding size measuring device.
Referring to fig. 1, the measuring apparatus includes a dial gauge 1, a positioning mechanism 2, and a fixing mechanism 3. A movable contact 11 is arranged at the end part of the probe of the dial indicator 1, and one end, away from the probe of the dial indicator 1, of the movable contact 11 is used for being in contact with a shaft neck of a crankshaft; the dial indicator 1 is arranged on the positioning mechanism 2, and the positioning mechanism 2 is used for placing the dial indicator 1 above the crankshaft journal when the crankshaft journal is ground by the grinding machine and enabling the movable contact 11 to be in a state of abutting against the cylindrical surface of the journal; the positioning mechanism 2 is connected to the fixing mechanism 3, the fixing mechanism 3 is installed on the grinding machine, and the fixing mechanism 3 is used for suspending the positioning mechanism 2 and the dial indicator 1 on one side of the grinding wheel of the grinding machine.
During the use, on the face of cylinder of the axle journal will be moved to the contact 11 butt through positioning mechanism 2, and promote the probe of micrometer 1 and remove, the axle journal is by the in-process of friction grinding wheel grinding, the axle journal size diminishes gradually, the probe of micrometer is under the effect of its self inside elastic force, the probe drives the state that moves contact 11 keeps with the axle journal butt, make the probe follow the change of axle journal size and remove, the pointer that the probe of micrometer 1 can drive micrometer 1 rotates simultaneously, the staff is through the removal of the pointer of observing micrometer 1, can observe the change of crankshaft journal size, reach the function of real-time supervision crankshaft journal grinding in-process dimensional change.
Referring to fig. 1 and 2, the positioning mechanism 2 includes a mounting plate 21 and two positioning contacts 22 disposed on the mounting plate 21. Mounting panel 21 is vertical place's flat board, and mounting panel 21 has seted up caulking groove 211 along one side of horizontal direction, and during the caulking groove 211 can be inlayed to the crankshaft journal, amesdial 1 set firmly in the mounting panel 21 top, and moving contact 11 sliding connection on mounting panel 21, and moving contact 11 keeps away from the tip of amesdial 1 and extends to the inboard top of caulking groove 211. The two positioning contacts 22 are also provided in the insertion groove 211, and the moving contact 11 and the two positioning contacts 22 are spaced apart along the circumferential direction of the insertion groove 211.
Referring to fig. 3 again, the moving contact 11 and the positioning contacts 22 are both used for contacting the cylindrical surface of the crankshaft journal, and the moving contact 11 and the positioning contacts 22 are both in a conical shape with the diameter gradually decreasing toward the inside of the caulking groove 211, and the end of the conical shape is in a spherical shape, so that the moving contact 11 and the positioning contacts 22 are both in point contact with the cylindrical surface of the crankshaft journal, and the projections of the spherical end portions of the moving contact 11 and the two positioning contacts 22 on the vertical plane are not located on the same straight line. Under the principle that three points which are not positioned on the same straight line can position a unique circle, the ends of the movable contact 11 and the two positioning contacts 22 can be abutted to the cylindrical surface of a cylinder at the same time, and the diameters of the cylinders which can be positioned by the movable contact 11, the movable contact 11 and the two positioning contacts 22 can be changed, so that the movable contact 11 and the positioning contacts 22 can be abutted to the cylinders with different diameters at the same time.
Referring to fig. 1, in use, one side of the crankshaft journal far away from the grinding wheel is inserted into the embedding groove 211, and meanwhile, the ends of the moving contact 11 and the two positioning contacts 22 are abutted to the cylindrical surface of the crankshaft journal; although the crankshaft journal has low dimensional accuracy and a large dimensional range before grinding, the movable contact 11 can be adapted to crankshaft journals of different sizes by moving the movable contact 11, thereby realizing the function of positioning the movable contact 11 on the cylindrical surface of the crankshaft journal.
During the grinding process of the crankshaft journal, the movable contact 11 will move along with the reduction of the crankshaft journal size until the circle size positioned by the movable contact 11 and the two positioning contacts 22 is consistent with the design size of the crankshaft journal. Because the positions of the two positioning contacts 22 are unchanged relative to the mounting plate 21 in the grinding process, when the crankshaft journal is ground to the designed size, the relative position of the movable contact 11 and the mounting plate 21 is unique, namely the scale value pointed by the pointer of the dial gauge 1 is also certain, the pointer of the dial gauge 1 at the position is adjusted to the zero scale value, so that the functions of measuring and monitoring the crankshaft journal size can be realized, a worker can judge whether the crankshaft journal is ground to the designed size by observing whether the pointer moves to the zero scale value, the measurement precision of the dial gauge 1 is high, and correspondingly, the grinding precision of the crankshaft journal is also high.
When crankshaft journals with different design dimensions are ground, although the position of the movable contact 11 can move on the mounting plate 21 to adjust the size of a circle positioned by the movable contact 11 and the two positioning contacts 22, the displacement of the movable contact 11 is small, the application range is small, and after the position of the movable contact 11 changes every time, the probe of the dial indicator 1 is driven to move, so that the scale pointed by the pointer of the dial indicator 1 changes, the probe position of the dial indicator 1 needs to be adjusted, the pointer of the dial indicator 1 points to the zero scale value again, and the operation is complicated.
Therefore, referring to fig. 2, in order to enable the positioning mechanism 2 to be matched with crankshaft journals with various design sizes, one positioning contact 22 is fixed on the mounting plate 21, and the other positioning contact 22 is connected to the positioning plate in a sliding manner, for convenience of description, the positioning contact 22 fixed with the mounting plate 21 is named as a fixed contact, the other positioning contact is named as a sliding contact, the sliding contact is located between the fixed contact and the movable contact 11, and the sliding contact can slide on the mounting plate 21 close to or far away from one side of the crankshaft journal, so that the diameter size of a cylinder which can be positioned by the three contacts can be adjusted, and the crankshaft journals with different diameter sizes can be matched. And a fixing piece 23 is arranged between the sliding contact and the mounting plate 21, and the fixing piece 23 locks the sliding contact on the fixing plate so as to ensure that the position of the sliding contact cannot be changed in the grinding process.
When the position of the sliding contact is adjusted, the crankshaft journal consistent with the designed size can be placed in the caulking groove 211, the movable contact 11 and the positioning contact 22 are enabled to be abutted to the crankshaft journal, then the sliding contact is moved slowly, the relative positions of the movable contact 11 and the fixed contact are adjusted, along with the movement of the sliding contact, the movable contact 11 can also move under the driving of the probe of the dial indicator 1, the pointer of the dial indicator 1 is enabled to rotate, when the pointer of the dial indicator 1 rotates to a zero scale value, the position of the surface sliding contact is adjusted to the position suitable for the size of the crankshaft journal, on the premise that the probe of the dial indicator 1 and the position of the movable contact 11 can be suitable for various size journals, the operation is simple and convenient.
Referring to fig. 4, the fixing member 23 includes a sliding block 231, the sliding block 231 is located on one side wall of the mounting plate 21 along the axial direction of the friction grinding wheel, a sliding groove 212 is formed in the mounting plate 21 and the sliding block 231, a bolt 232 penetrates through the sliding groove 212, a stud of the bolt 232 penetrates through the sliding groove 212 and then is connected to the sliding block 231 in a threaded manner, a nut of the bolt 232 is pressed against the mounting plate 21, the sliding block 231 is fixed on the mounting plate 21 through the nut of the bolt 232 and pressing forces of the sliding block 231 on two sides of the mounting plate 21, and when the position of the sliding contact is adjusted, the sliding block 231 can move along the opening direction of.
Referring to fig. 3 and 5, still set firmly a fixed cylinder 24 on mounting panel 21, a fixed cylinder 24 is the drum that sets up along vertical direction, and the upper and lower both ends of a fixed cylinder 24 all are the opening form, wear to be equipped with extension rod 25 in the fixed cylinder 24, extension rod 25 sliding connection is in a fixed cylinder 24, make extension rod 25 can do the ascending slip of vertical direction, the top lateral wall of a fixed cylinder 24 has set firmly mount table 26, amesdial 1 sets firmly on mount table 26, amesdial 1's contact butt is on the top of extension rod 25 simultaneously, and the bottom of extension rod 25 extends behind a fixed cylinder 24 and is connected with mobile contact 11.
Referring to fig. 1 again, the movable contact 11 performs a sliding function on the mounting plate 21 under the action of the extension rod 25 and the fixed cylinder 24, and the movable contact 11 and the probe of the dial gauge 1 are linked through the extension rod 25. When the movable contact 11 is jacked upwards by the crankshaft journal, the movable contact 11 drives the extension rod 25 to move upwards, and the extension rod 25 pushes the probe of the dial indicator 1 to move; on the contrary, in the process that the crankshaft journal becomes smaller, the movable contact 11 and the extension rod 25 move downwards under the action of gravity, and meanwhile, the probe of the dial indicator 1 moves along with the extension rod 25 under the action of the internal elastic force thereof, so that the probe is kept in a state of being abutted against the extension rod 25. Because the heat that produces the grinding department of bent axle needs to use the coolant liquid to cool off at the grinding in-process, compare and directly be connected with mobile contact 11 with amesdial 1, under the effect of extension rod 25, prolonged the interval of amesdial 1 apart from the bent axle grinding position, make the coolant liquid be difficult for spattering on amesdial 1 and influence its measurement accuracy.
Referring to fig. 5, a screw 111 is fixedly arranged at one end of the movable contact 11 close to the extension rod 25, the screw 111 penetrates through the side wall of the bottom end of the extension rod 25 to be in threaded connection with the extension rod, the distance between the movable contact 11 and the bottom of the extension rod 25 can be adjusted by rotating the movable contact 11, the extending length of the probe of the dial indicator 1 can be conveniently adjusted, and the pointer of the dial indicator 1 can be adjusted to a zero scale value. The screw 111 is further connected with a locking nut 112 in a threaded manner, the locking nut 112 abuts against the bottom end of the extension rod 25, and after the position of the movable contact 11 is adjusted, the locking nut 112 is screwed onto the extension rod 25, so that the screw 111 can be locked, and the screw 111 is not easy to loosen.
Referring to fig. 5, the inner diameter of the fixed cylinder 24 is greater than the diameter of the extension rod 25, the inner side walls of the extension rod 25 and the fixed cylinder 24 are arranged at intervals, the bottom end of the fixed cylinder 24 is fixedly provided with a guide cylinder 241, the top end of the fixed cylinder is fixedly provided with a limit ring 242, the inner diameters of the limit ring 242 and the guide cylinder 241 are in clearance fit with the inner diameter of the extension rod 25, the fixed cylinder 24 and the axes of the guide cylinder 241 and the limit ring 242 are overlapped, the top end of the extension rod 25 is sleeved in the limit ring 242 and abutted to the probe of the dial indicator 1, the bottom end of the extension rod 25 is sleeved in the fixed cylinder 24, and the extension rod extends out of the fixed cylinder.
Referring to fig. 5, a limiting disc 251 is fixedly disposed on the extension rod 25, the limiting disc 251 is disposed in the fixed cylinder 24 and slidably connected therewith, and the inner diameter of the fixed cylinder 24 is larger than the inner diameter of the guide cylinder 241, so that the limiting disc 251 cannot pass through the guide cylinder 241, and when the movable contact 11 is not in contact with the crankshaft journal, the extension rod 25 will not be pulled out of the fixed cylinder 24 under the action of gravity.
Referring to fig. 5, a spring 27 is further arranged between the extension rod 25 and the fixed cylinder 24, the spring 27 is sleeved between the extension rod 25 and the fixed cylinder 24, one end of the spring 27 is abutted to the limit ring 242, the other end of the spring 27 is abutted to the limit disc, and the spring 27 is in a compressed state, so that the spring 27 provides a thrust towards one side of the movable contact 11 for the extension rod 25 through the limit disc 251, in the grinding process, the movable contact 11 and the extension rod 25 are simultaneously subjected to the action of the elastic part to be kept in the state of being abutted to a crankshaft journal, and the probe of the dial indicator 1 can be stably moved to rotate the pointer of the dial indicator 1, and the grinding precision is improved.
Referring to fig. 1, the fixing mechanism 3 includes a mounting rod 31 and a mounting shaft 32, the mounting rod 31 is cylindrical, an axis of the mounting rod 31 is perpendicular to an axis of a grinding wheel of the grinding machine, a middle portion of the mounting rod 31 in a length direction thereof is hinged to a grinding wheel cover of the grinding machine, and a rotation axis of the mounting rod 31 on the grinding wheel cover is parallel to the axis of the grinding wheel of the grinding machine. One end of the mounting rod 31 extends to one side, close to the station of the worker, of the grinding machine grinding wheel and is rotationally connected with the mounting shaft 32, the axis of the mounting shaft 32 is parallel to that of the grinding machine grinding wheel, and one end, far away from the mounting rod 31, of the mounting shaft 32 is fixedly connected with the mounting table 26, so that the dial indicator 1, the positioning mechanism 2 and the movable contact 11 are all suspended on one side of the grinding machine grinding wheel.
Referring to fig. 1, a weight block 33 is further disposed at an end of the mounting rod 31 away from the mounting shaft 32, and a weight of the weight block 33 is greater than an overall weight of the positioning mechanism 2, the dial indicator 1, the movable contact 11 and the mounting shaft 32, so that a torque generated by the weight block 33 to the mounting rod 31 is greater than a torque generated by one side of the positioning mechanism 2 to the mounting rod 31, and the weight block 33 tends to rotate downward.
Referring to fig. 1 and 6, when the positioning mechanism 2 is used, the fixed contact in the positioning mechanism 2 is located at the bottom of the crankshaft journal, and at this time, the rotating torque generated by the counterweight 33 on the mounting rod 31 acts on the fixed contact, and the fixed contact is restricted by the crankshaft journal and cannot move, so that the positioning mechanism 2 is kept in a state of being matched with the crankshaft journal. After the grinding work is finished, the mounting plate 21 is rotated towards one side far away from the grinding wheel, the shaft neck of the crankshaft is separated from the caulking groove 211, the fixed contact is not limited any more, after the mounting plate 21 is loosened by a worker, the counterweight 33 immediately drives the mounting rod 31 to rotate, one side of the positioning mechanism 2 is moved upwards to the upper side of the crankshaft, the installation or the disassembly operation of the crankshaft by the worker is not interfered, and the grinding machine is simple and convenient to use.
The implementation principle of the crankshaft journal grinding size measuring device in the embodiment of the application is as follows: through the mutual cooperation of the movable contact 11 and the two positioning contacts 22, and under the principle that only one circle can be positioned at three points, the size change of the crankshaft journal can be transmitted to the probe of the dial indicator 1 through the movable contact 11 in the grinding process, and the pointer of the dial indicator 1 can rotate, so that a worker can observe the size change amount in the grinding process of the crankshaft journal in real time through the rotation of the pointer of the dial indicator 1, the crankshaft journal is not required to be repeatedly stopped to measure the crankshaft journal, the grinding of the crankshaft journal is stopped when the pointer of the dial indicator 1 points to a zero scale value, the crankshaft journal is ground to a required design size at the moment, and the purpose of improving the grinding efficiency of the crankshaft journal on the premise of ensuring the grinding precision of the crankshaft journal is achieved.
The above embodiments are preferred embodiments of the present application, and the protection scope of the present application is not limited by the above embodiments, so: all equivalent changes made according to the structure, shape and principle of the present application shall be covered by the protection scope of the present application.
Claims (10)
1. The utility model provides a bent axle journal grinding size measuring device which characterized in that: the probe comprises a dial indicator (1), a movable contact (11) arranged on a probe of the dial indicator (1), a positioning mechanism (2) connected with the dial indicator (1), and a fixing mechanism (3) connected with the positioning mechanism (2); the fixing mechanism (3) is used for installing the dial indicator (1) and the positioning mechanism (2) on the grinding machine, the movable contact (11) is connected in the positioning mechanism (2) in a sliding mode, and the positioning mechanism (2) is used for enabling the movable contact (11) to be kept in contact with the cylindrical surface of the crankshaft journal in the grinding process.
2. A crankshaft journal grinding dimension measuring device as in claim 1 wherein: the positioning mechanism (2) comprises an installation plate (21) and two positioning contacts (22) fixed on the installation plate (21), a shell of the dial indicator (1) is fixedly connected with the installation plate (21), and the movable contact (11) is connected to the installation plate (21) in a sliding manner; offer caulking groove (211) that can supply the crankshaft journal to get into on mounting panel (21), the one end that amesdial (1) was kept away from in mobile contact (11) extends caulking groove (211), and the one end of two location contacts (22) also all extends to in caulking groove (211), and mobile contact (11) and two projection that location contact (22) lie in tip in caulking groove (211) on the plumb plane do not lie in same straight line.
3. A crankshaft journal grinding dimension measuring device as in claim 2 wherein: one of the positioning contacts (22) is connected to the mounting plate (21) in a sliding manner, so that the positioning contact (22) can move close to or far away from one side of the caulking groove (211), and a fixing piece (23) for fixing the position of the positioning contact (22) on the mounting plate (21) is arranged between the positioning contact (22) and the mounting plate (21).
4. A crankshaft journal grinding dimension measuring device as in claim 2 wherein: the movable contact (11) and one end of the two positioning contacts (22) which are positioned in the caulking groove (211) are spherical.
5. A crankshaft journal grinding dimension measuring device as in claim 1 wherein: the positioning mechanism (2) further comprises a fixing cylinder (24) fixedly arranged on the mounting plate (21), one end, far away from the mounting plate (21), of the fixing cylinder (24) is connected with the fixing mechanism (3), and the shell of the dial indicator (1) is fixed on the outer side wall of the fixing cylinder (24); the extension rod (25) is sleeved in the fixed cylinder (24), the extension rod (25) is connected with the fixed cylinder (24) in a sliding mode, one end of the extension rod (25) stretches out of the probe butt of the fixed cylinder (24) and the dial indicator (1), and the other end of the extension rod stretches out of the fixed cylinder (24) and is connected with the movable contact (11).
6. A crankshaft journal grinding dimension measuring device as in claim 5 wherein: one end of the movable contact (11) close to the extension rod (25) is fixedly provided with a screw rod (111), and the screw rod (111) is in threaded connection with the extension rod (25).
7. A crankshaft journal grinding dimension measuring device as in claim 5 wherein: a spring (27) is further arranged between the fixed cylinder (24) and the extension rod (25), and the spring (27) applies a pushing force to the extension rod (25) towards the movable contact (11).
8. A crankshaft journal grinding dimension measuring device as in any one of claims 1-7 wherein: the fixing mechanism (3) comprises an installation rod (31) hinged to the grinding machine and an installation shaft (32) hinged to the installation rod (31), and one end, far away from the installation rod (31), of the installation shaft (32) is connected with the positioning mechanism (2).
9. A crankshaft journal grinding dimension measuring device as in claim 8 wherein: the mounting rod (31) is hinged to a grinding wheel cover of the grinding machine.
10. A crankshaft journal grinding dimension measuring device as in claim 9 wherein: the one end that installation axle (32) was kept away from in installation pole (31) has set firmly balancing weight (33), the pin joint of installation pole (31) and wheel guard is located balancing weight (33) and installation axle (32) between, the moment of torsion that balancing weight (33) gravity produced installation pole (31) is greater than the moment of torsion that fixed establishment (3), amesdial (1) and the gravity of installation axle (32) produced installation pole (31).
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202110271391.0A CN113043168A (en) | 2021-03-13 | 2021-03-13 | Crankshaft journal grinding size measuring device |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202110271391.0A CN113043168A (en) | 2021-03-13 | 2021-03-13 | Crankshaft journal grinding size measuring device |
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| CN113043168A true CN113043168A (en) | 2021-06-29 |
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| CN202110271391.0A Pending CN113043168A (en) | 2021-03-13 | 2021-03-13 | Crankshaft journal grinding size measuring device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114193232A (en) * | 2021-11-26 | 2022-03-18 | 齐齐哈尔二机床(集团)有限责任公司 | Five-axis tool nose following function precision measuring device and method for heavy floor type boring and milling machine |
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| JPH1047906A (en) * | 1996-07-31 | 1998-02-20 | Isuzu Motors Ltd | Measuring device for crank shaft |
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| JPH1047906A (en) * | 1996-07-31 | 1998-02-20 | Isuzu Motors Ltd | Measuring device for crank shaft |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114193232A (en) * | 2021-11-26 | 2022-03-18 | 齐齐哈尔二机床(集团)有限责任公司 | Five-axis tool nose following function precision measuring device and method for heavy floor type boring and milling machine |
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