Inner diameter measuring device
阅读说明：本技术 内径测量装置 (Inner diameter measuring device ) 是由 徐晓刚 王坤东 于 2019-10-31 设计创作，主要内容包括：本发明涉及自动检测设备技术领域内的一种内径测量装置,包括自主行走机构、定位扫描机构、变向传动机构以及机架；所述自主行走机构与所述定位扫描机构分别连接于所述机架轴线方向的两端；所述自主行走机构包括支撑行走轮组和动力传动组件,所述支撑行走轮组通过所述动力传动组件沿所述机架横截面的径向伸缩；所述定位扫描机构包括支撑杆与转台组件,多个所述支撑杆连接于所述转台组件的圆周面上,所述转台组件设置有测距仪；所述支撑杆通过所述变向传动机构与所述支撑行走轮组连接并实现反向伸缩。本发明装置通过变向传动机构实现了测量支撑定位和支撑行走的一体化,简单便捷,测量精准。(The invention relates to an inner diameter measuring device in the technical field of automatic detection equipment, which comprises an autonomous walking mechanism, a positioning scanning mechanism, a turning transmission mechanism and a rack, wherein the autonomous walking mechanism is arranged on the rack; the autonomous traveling mechanism and the positioning scanning mechanism are respectively connected to two ends of the frame in the axial direction; the automatic walking mechanism comprises a supporting walking wheel set and a power transmission assembly, and the supporting walking wheel set stretches and retracts along the radial direction of the cross section of the rack through the power transmission assembly; the positioning scanning mechanism comprises supporting rods and a rotary table assembly, the supporting rods are connected to the circumferential surface of the rotary table assembly, and the rotary table assembly is provided with a range finder; the supporting rod is connected with the supporting walking wheel set through the turning transmission mechanism and achieves reverse stretching. The device realizes the integration of measurement, support and positioning and support and walking through the turning transmission mechanism, and is simple, convenient and accurate in measurement.)
1. An inner diameter measuring device is characterized by comprising an autonomous walking mechanism, a positioning scanning mechanism, a turning transmission mechanism and a rack;
the autonomous traveling mechanism and the positioning scanning mechanism are respectively connected to two ends of the frame in the axial direction;
the automatic walking mechanism comprises a supporting walking wheel set and a power transmission assembly, and the supporting walking wheel set stretches and retracts along the radial direction of the cross section of the rack through the power transmission assembly;
the positioning scanning mechanism comprises supporting rods and a rotary table assembly, the supporting rods are connected to the circumferential surface of the rotary table assembly, and the rotary table assembly is provided with a range finder;
the supporting rod is connected with the supporting walking wheel set through the turning transmission mechanism and achieves reverse stretching.
2. The inner diameter measuring device according to claim 1, wherein the supporting traveling wheel sets comprise a passive supporting wheel set and an active traveling wheel set, and 2 passive supporting wheel sets and 1 active traveling wheel set are uniformly distributed along the circumferential direction of the frame.
3. The inner diameter measuring device according to claim 2, wherein the power transmission assembly comprises a support motor, a main bevel gear, a lead screw and a nut, the driven support wheel set and the driving traveling wheel set are respectively provided with a driven bevel gear and a wheel carrier, the main bevel gear is connected with an output shaft of the support motor, the driven bevel gear is respectively in meshing transmission with the main bevel gear and the lead screw, the nut is in matching connection with the lead screw, and the wheel carrier is connected with the nut.
4. The inside diameter measurement device of claim 3, wherein the direction-changing transmission mechanism includes a lever and a lever seat, the lever seat is connected to the frame, the lever rotates around the lever seat, one end of the lever is connected to the nut, and the other end of the lever is connected to the support rod.
5. The inside diameter measurement device of claim 4, wherein the direction change transmission mechanism further comprises a shift fork cap, one end of the lever is arranged in the shift fork cap, and the shift fork cap is connected with the support rod.
6. The inner diameter measuring device as claimed in claim 5, wherein the nut or/and the support rod is provided with an arc-shaped groove, and the lever or/and the shifting fork cap is provided with an arc-shaped end portion matched with the arc-shaped groove.
7. The inside diameter measurement device of claim 1, wherein the turntable assembly further comprises a turntable motor, a drive wheel and a turntable, the drive wheel is connected with an output shaft of the turntable motor, the range finder is mounted on the turntable, and the drive wheel is in driving connection with the turntable.
8. The inside diameter measuring device of claim 7, wherein the transmission wheel is in transmission connection with the rotating table through a transmission belt, and the transmission belt is an elastic transmission belt.
9. The inside diameter measurement device of claim 8, wherein the turntable is mounted to the frame by bearings, the number of bearings being 2, the 2 bearings being concentrically paired.
10. The inner diameter measuring device according to claim 1, wherein the frame is provided with a sliding groove, the sliding groove is arranged along a radial direction of the frame, the support rod slides in the sliding groove, and a pre-tightening force is arranged between the support rod and the sliding groove.
Technical Field
The invention relates to the technical field of automatic detection equipment, in particular to an inner diameter measuring device.
Background
The hydraulic oil cylinder is an effective execution device under heavy load, and is widely applied to various industries such as mine exploitation, tunnel construction, engineering machinery, submarine oil exploitation and the like. The oil cylinder works under heavy load, and the working environment is severe, so the maintenance of the oil cylinder is very important. Along with the progress of abrasion, aging, corrosion and the like, or the cylinder is overloaded, the inner diameter of the cylinder, particularly the inner diameter of the cylinder at the position with the matching tolerance, can change, and the changes need to be effectively detected so as to find problems in early stage and prevent accidents.
In-service oil cylinder detection is an effective means for guaranteeing normal work of an oil cylinder, and generally, measurement is carried out through large-scale detection equipment such as a three-coordinate machine, a large-scale caliper or a micrometer in the overhaul or maintenance stage. The mechanical large caliper or inside micrometer is large in size, heavy in weight and difficult to use, in addition, the specifications of the cylinder diameter of the oil cylinder are more, the span is larger, a full series of inside micrometers with different measurement ranges are generally required to be prepared, even more than 10 inside micrometers are required, and the mechanical large caliper or inside micrometer is very high in equipment purchase and maintenance cost. In addition, the three-coordinate measuring machine with higher measuring precision is huge in equipment, and cannot be used in an industrial overhaul and maintenance field. At present, a lightweight and portable microminiature measuring device is lacked for field measurement.
Along with the development of modern optical measurement technology, high-precision laser ranging sensor is expected to be used for detecting the inner diameter of the oil cylinder, but the difficult point and the key problem to be solved are as follows: (1) the inner diameter measurement needs to position a sensor in an oil cylinder, and generally ensures that an optical axis of a laser is perpendicular to the axis of the oil cylinder and passes through the center of a cross-section circle of the oil cylinder; (2) the large-depth oil cylinder sometimes even reaches more than 6 meters, so that the measuring system is required to have the function of automatically walking in the oil cylinder so as to realize the full-depth inner diameter scanning; (3) the measuring system has a compact structure, is convenient to realize miniaturization, is easy to carry, and can carry out field measurement. In order to solve the above problems and meet the needs of industrial field measurement, new measurement methods and mechanisms need to be explored.
The prior art searches and discovers that Chinese patent publication No. CN208765634U discloses an automatic detection device for the inner diameter of an oil cylinder, which comprises a machine table, a driving device, a detection mechanism, a lifting mechanism and a control device, wherein the driving device and the lifting device are arranged on the machine table, the driving device is connected with the detection mechanism, the driving device drives the detection mechanism to move, and the control device is electrically connected with the driving device, the lifting device and the detection mechanism. The damage to the device can be avoided, the efficiency is high, and the precision is guaranteed by detection of an automatic control system. Nevertheless this utility model detects and still need carry out corresponding lift operation to the hydro-cylinder, has increaseed the complexity of the dismouting technology of whole flow.
Disclosure of Invention
In view of the shortcomings in the prior art, it is an object of the present invention to provide an inner diameter measuring device.
The inner diameter measuring device provided by the invention comprises an autonomous walking mechanism, a positioning scanning mechanism, a turning transmission mechanism and a rack;
the autonomous traveling mechanism and the positioning scanning mechanism are respectively connected to two ends of the frame in the axial direction;
the automatic walking mechanism comprises a supporting walking wheel set and a power transmission assembly, and the supporting walking wheel set stretches and retracts along the radial direction of the cross section of the rack through the power transmission assembly;
the positioning scanning mechanism comprises supporting rods and a rotary table assembly, the supporting rods are connected to the circumferential surface of the rotary table assembly, and the rotary table assembly is provided with a range finder;
the supporting rod is connected with the supporting walking wheel set through the turning transmission mechanism and achieves reverse stretching.
In some embodiments, the supporting traveling wheel set includes a passive supporting wheel set and an active traveling wheel set, and 2 sets of the passive supporting wheel set and 1 set of the active traveling wheel set are uniformly distributed along the circumferential direction of the rack.
In some embodiments, the power transmission assembly includes a supporting motor, a main bevel gear, a lead screw, and a nut, the driven supporting wheel set and the driving traveling wheel set are respectively provided with a slave bevel gear and a wheel carrier, the main bevel gear is connected with an output shaft of the supporting motor, the slave bevel gear is respectively in meshing transmission with the main bevel gear and the lead screw, the nut is in matching connection with the lead screw, and the wheel carrier is connected with the nut.
In some embodiments, the direction-changing transmission mechanism includes a lever and a lever seat, the lever seat is connected to the frame, the lever rotates around the lever seat, one end of the lever is connected to the nut, and the other end of the lever is connected to the support rod.
In some embodiments, the direction-changing transmission mechanism further comprises a shifting fork cap, one end of the lever is arranged in the shifting fork cap, and the shifting fork cap is connected with the supporting rod.
In some embodiments, the nut or/and the support rod are provided with an arc-shaped groove, and the lever or/and the shifting fork cap is provided with an arc-shaped end portion matched with the arc-shaped groove.
In some embodiments, the turntable assembly further comprises a turntable motor, a driving wheel and a rotating table, the driving wheel is connected with an output shaft of the turntable motor, the range finder is mounted on the rotating table, and the driving wheel is in transmission connection with the rotating table.
In some embodiments, the transmission wheel is in transmission connection with the rotating table through a transmission belt, and the transmission belt is an elastic transmission belt.
In some embodiments, the rotating table is mounted on the frame by bearings, the number of the bearings is 2, and 2 bearings are concentrically paired.
In some embodiments, the rack is provided with a sliding groove, the sliding groove is arranged along the radial direction of the rack, the supporting rod slides in the sliding groove, and a pre-tightening force is arranged between the supporting rod and the sliding groove.
Compared with the prior art, the invention has the following beneficial effects:
1. the device realizes the integration of measurement, support and positioning and support and walking through the turning transmission mechanism, and is simple, convenient and accurate in measurement.
2. The invention relates to an inner diameter measuring device which can automatically walk and automatically center the position in a large-caliber and high-depth oil cylinder and can carry out full-depth range coverage.
Drawings
Other features, objects and advantages of the invention will become more apparent upon reading of the detailed description of non-limiting embodiments with reference to the following drawings:
FIG. 1 is a composition diagram of an integrated cylinder bore diameter measurement system;
FIG. 2 is a schematic view of the passive support assembly movement and the support bar linkage;
FIG. 3 is a schematic structural diagram of the active walking assembly;
FIG. 4 is a schematic view of the arrangement of passive support elements and active walking elements;
fig. 5 is a schematic structural view of the turntable assembly.
Detailed Description
The present invention will be described in detail with reference to specific examples. The following examples will assist those skilled in the art in further understanding the invention, but are not intended to limit the invention in any way. It should be noted that it would be obvious to those skilled in the art that various changes and modifications can be made without departing from the spirit of the invention. All falling within the scope of the present invention.
The invention provides an inner diameter measuring device, which comprises an autonomous walking mechanism, a positioning scanning mechanism, a turning transmission mechanism and a rack, wherein the autonomous walking mechanism is arranged on the rack;
the autonomous traveling mechanism and the positioning scanning mechanism are respectively connected to the two axial ends of the rack;
the automatic walking mechanism comprises a supporting walking wheel set and a power transmission assembly, and the supporting walking wheel set stretches and retracts along the radial direction of the cross section of the rack through the power transmission assembly;
the positioning scanning mechanism comprises supporting rods and a rotary table assembly, the supporting rods are connected to the circumferential surface of the rotary table assembly, and the rotary table assembly is provided with a range finder;
the supporting rod is connected with the supporting walking wheel set through the turning transmission mechanism and achieves reverse stretching.
The structural principle of the device is explained as follows:
the supporting traveling wheel sets in the autonomous traveling mechanism are matched with the supporting rods and are provided with a plurality of groups, each group of supporting traveling wheel sets can be arranged identically and are active supporting traveling wheel sets with power sources, sliding along the inner cylinder surface of the cylinder body to be tested is realized through self-adjustment, the sliding can be realized along the axial direction or the radial direction of the cylinder body to be tested, and meanwhile, the plurality of groups of supporting traveling wheel sets realize unified coordination through a control device, such as consistent direction, consistent speed and the like; it is different that its every group supports walking wheel group also can set to, and a set of walking wheel group that sets to has the power supply sets to, and other set up to passive support wheelset, support walking wheel group through every group that has power and drive other passive support wheelsets and move.
In the positioning and scanning mechanism, a distance measuring instrument is arranged on a rotary table assembly of the positioning and scanning mechanism, a plurality of supporting rods are arranged on the circumferential surface of the rotary table assembly, the supporting rods are telescopic, an inner diameter measuring device is fixed in the inner circle of the to-be-measured cylinder body through the length of the adjusting supporting rods, and the inner diameter of the to-be-measured cylinder body can be measured through the distance measuring instrument.
Through diversion transmission structure with the bracing piece with support walking wheel group link to realize the bracing piece and support walking wheelset and radially move with opposite direction along the frame, be about for internal diameter measuring device arrange the stack shell that awaits measuring in, the axis coincidence of frame and the stack shell that awaits measuring, its radial direction is unanimous:
the supporting traveling wheel sets extend outwards along the radial direction of the rack through the power transmission assembly, the wheel sets of the supporting traveling wheel sets compress the inner circular surface of the cylinder to be tested, the inner diameter measuring device is supported on the inner circular surface of the cylinder to be tested, the supporting rods are in a retraction state due to the turning transmission structure, namely the supporting rods are not in contact with the inner circular surface of the cylinder to be tested, and one or more supporting traveling wheel sets with power sources move along the axis direction of the cylinder to be tested through the driving traveling wheels.
When the position needs to be measured, the walking wheel set is supported to stop moving, the walking wheel set is supported to retract through the power transmission assembly, meanwhile, the supporting rods are extended through the turning transmission structure, at the moment, the pressing state of the supporting rods and the inner circular surface of the inner cylinder to be measured is achieved, and the distance measuring instrument is driven to rotate through the rotary table assembly to achieve measurement of the inner diameter of the cylinder body of the cylinder to be measured.
The device realizes the integration of measurement, support and positioning and support and walking through the turning transmission mechanism, and can realize the measurement of the inner diameter of any point position in the depth direction in the cylinder.
The present invention will be described in detail below by taking the measurement of the inner diameter of the cylinder as an example, please refer to fig. 1 to 5 at the same time:
as shown in fig. 1, the oil cylinder inner diameter measuring device provided in this embodiment specifically includes a passive
As shown in fig. 2, the passive
As shown in fig. 2, the lever transmission mechanism 4 provided by this embodiment is composed of a lever 4-1, a lever seat 4-2, and a shifting fork cap 4-3, the lever 4-1 is installed on the lever seat 4-2, the lever seat 4-2 is installed on the frame 1-1, the center of the lever 4-1 rotates around the pin of the lever seat 4-2, one end of the lever 4-1 is arc-shaped and tangent to the arc-shaped groove of the nut 1-4, the other end is installed with the adjustable shifting fork cap 4-3, and one end of the shifting fork cap 4-3 is arc-shaped and tangent to the arc-shaped groove of the support rod 5. The shifting fork cap 4-3 facilitates the installation of the lever 4-1, namely the shifting fork cap 4-3 is inserted to the bottom at the right side of the lever 4-1, the lever 4-1 is installed firstly, then the shifting fork cap 4-3 is pulled out to extend into the circular groove of the support rod 5, and then the shifting fork cap 4-3 is fixed on the lever by using a set screw. When the nut 1-4 is tightened outwards along the diameter of the oil cylinder, the support rod 5 is shifted inwards along the diameter of the oil cylinder by the shifting fork cap 4-3, and when the nut 1-4 is retracted inwards along the diameter of the oil cylinder, the support rod 5 is shifted outwards along the diameter of the oil cylinder by the shifting fork cap 4-3 to tighten the inner wall of the oil cylinder; preferably, the support rod 5 slides in a chute of the frame 1-1, the direction of the chute is along the diameter direction, the machined surface of the chute is ensured to be vertical to the axis of the frame, and pretightening force is added between the support rod and the chute to ensure the verticality of the support rod and the axis of the frame.
As shown in fig. 3, the driving traveling
As shown in fig. 4, in the integrated cylinder inner diameter measuring system provided in this embodiment, two passive
As shown in fig. 5, the turntable assembly 6 provided in this embodiment is composed of a turntable motor 6-1, a transmission belt 6-2, a main pulley 6-3, a rotating table 6-4, a laser distance measuring sensor 6-5, a sleeve 6-6 and a bearing 6-7, wherein the laser distance measuring sensor 6-5 is installed on the rotating table 6-4, the rotating table 6-4 is installed and supported on the inner cylindrical surface of the frame 1-1 by using the bearing 6-7, preferably, the two bearings 6-7 for the support of the rotating table 6-4 on the inner cylinder of the frame 1-1 need to be concentrically paired, the concentric pairing refers to the selection of bearings, and the roundness and tolerance of the inner rings of the two bearings are consistent as much as possible so as to reduce errors such as rotation runout caused by bearing support; an arc-shaped groove is processed on the side surface of a cylinder of the rotating table 6-4 and used for installing a transmission belt 6-2, the rotary table motor 6-1 is installed on the rack 1-1, the main belt pulley 6-3 is installed on an output shaft of the rotary table motor 6-1 and is connected to the rotating table 6-4 through the transmission belt 6-2 to carry out rotary scanning. Preferably, the transmission belt 6-2 is an elastic circular belt, so that vibration impact and interference of the turntable motor on the turntable are absorbed to the maximum extent, and the measurement accuracy is improved.
The foregoing description of specific embodiments of the present invention has been presented. It is to be understood that the present invention is not limited to the specific embodiments described above, and that various changes or modifications may be made by one skilled in the art within the scope of the appended claims without departing from the spirit of the invention. The embodiments and features of the embodiments of the present application may be combined with each other arbitrarily without conflict.