CN108204795B - Measuring arm with self-balancing shaft - Google Patents
Measuring arm with self-balancing shaft Download PDFInfo
- Publication number
- CN108204795B CN108204795B CN201810295264.2A CN201810295264A CN108204795B CN 108204795 B CN108204795 B CN 108204795B CN 201810295264 A CN201810295264 A CN 201810295264A CN 108204795 B CN108204795 B CN 108204795B
- Authority
- CN
- China
- Prior art keywords
- shaft
- fixed shaft
- torsion spring
- balance
- stage
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
- 238000009434 installation Methods 0.000 abstract description 14
- 230000005484 gravity Effects 0.000 abstract description 9
- 230000000087 stabilizing effect Effects 0.000 abstract description 3
- 238000005259 measurement Methods 0.000 description 10
- 239000000463 material Substances 0.000 description 3
- 230000003139 buffering effect Effects 0.000 description 2
- 238000011900 installation process Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000000149 penetrating effect Effects 0.000 description 2
- 238000007789 sealing Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 125000004122 cyclic group Chemical group 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Manipulator (AREA)
- Testing Of Balance (AREA)
Abstract
The invention relates to a measuring arm with a self-balancing shaft, comprising: the fixed shaft is of a hollow structure, and an axial fixed shaft annular groove is formed in the end face of the rear side of the fixed shaft; the rotating sleeve comprises a rotating side cover corresponding to the rear end face of the fixed shaft and an upper cover arc plate axially parallel to the fixed shaft; the inner side surface of the rotating side cover is provided with a rotating sleeve inner groove which corresponds to the annular groove of the fixed shaft; the connecting shaft is rotationally connected with the fixed shaft through a bearing, and one end part of the connecting shaft is connected with the rotating side cover; the balance torsion spring is arranged in the annular groove of the fixed shaft, one end part of the balance torsion spring is fixedly arranged in the inner groove of the rotating sleeve, and the other end part of the balance torsion spring is connected with the annular groove of the fixed shaft. The invention provides the measuring arm which can realize automatic moment balance, achieve the purpose of stabilizing the gravity center, reduce the volume and the weight and reduce the installation difficulty of the balance torsion spring.
Description
Technical Field
The invention relates to the field of self-balancing control of measuring arms, in particular to a measuring arm with a self-balancing shaft.
Background
The measuring arm is used as a precise three-dimensional measuring tool and is widely applied to the detection and measurement of the sizes and assembly of molds and parts, such as reverse engineering, modeling design, digital-analog comparison and the like. The structure of the device consists of a base, a plurality of motion shafts (usually 6-7) and measuring heads, and has the characteristics of small volume, portable use, high precision, infinite rotation and no dead point measurement. The structure of the relative movement on the movement axis mainly comprises a rotation axis and a fixed axis. When the measuring arm rotates to measure, the gravity center positions of other parts except the base and the first moving axis (namely the A axis) change correspondingly along with the position change of the measured point, so that the change of gravity center moment needs to be balanced automatically through a self-balancing device in a balancing axis (namely the B axis), a measuring head positioned at the tail end of the measuring arm is positioned at any space position in a measuring range stably, then the lever measuring head or the laser measuring head is used for carrying out contact or non-contact precise measurement, and then the precise position information of the measured point is obtained through calculation according to the feedback position information of the position sensor in each moving axis. The self-balancing device of the measuring arm is thus the basis for achieving its accurate measuring function. The main structure of the balance shaft of the measuring arm comprises a self-balancing device, a bearing mechanism and an angle encoder. Because of the small volume of the measuring arm, the self-balancing device is also a structure of two parts of a rotating shaft and a fixed shaft of the balancing shaft, and the self-balancing function in the relative motion is realized by connecting the two parts through the balancing torsion spring. The key of the self-balancing device is that the device can automatically adjust the torsion of the balancing torsion spring according to the change of the gravity centers of the parts of the measuring arm except the base and the first motion shaft in the space position, so as to realize the balance of the torque generated by the balancing torsion spring when the rotating shaft and the fixed shaft are in any relative positions and the gravity distances of the parts of the measuring arm except the base and the measured shaft. The measuring arm then senses the measured position information by means of a coaxially connected position sensor. Thus, the self-balancing device is required to accurately install the balancing torsion spring in the installation process so as to achieve moment balance. At the same time, the portable measurement characteristics of the measuring arm require that the volume and weight of the measuring arm be as small as possible. If the self-balancing device is too large in size and weight, the self-balancing device not only occupies too large working positions in measurement and is inconvenient to move, but also is unfavorable for stabilizing the gravity center position of the measuring head in measurement. And the size and the torsion specification of the balance torsion spring can be correspondingly increased due to the excessive weight, and the strength of the parts matched with the balance torsion spring needs to be correspondingly enhanced. This would preferably increase the volume and weight of the self-balancing device. The balance shaft solution of the traditional measuring arm (as shown in fig. 10-12) is to sequentially and horizontally connect the self-balancing device 1, the bearing mechanism 2 and the angle encoder 3 in series through the connecting shaft 4, the balance shaft rotating shaft 5 is fixedly connected with the connecting shaft 4 through a fastener 7, the bearing mechanism 2 is positioned between the connecting shaft 4 and the balance shaft fixing shaft 6, and the relative rotation between the connecting shaft 4 and the balance shaft fixing shaft 6 is ensured through a bearing. The balance torsion spring 8 is installed between the balance shaft rotation shaft 5 and the balance shaft fixing shaft 6. The two ends of the balance torsion spring 8 are respectively clamped in the slots of the inclined stop block 9 and the balance shaft fixing shaft 6. The inclined stop block 9 is fixedly connected with the balance shaft rotating shaft 5 through a fastener 7. When the installation is completed, the connecting shaft 4 passes through the inner ring of the balance torsion spring 8. Because the balance shaft adopts a horizontal series installation mode to arrange the self-balancing device, the bearing mechanism and the angle encoder, the horizontal length of the balance shaft of the measuring arm is larger, the whole volume and the weight of the balance shaft are increased, and the stability of the position of the measuring arm during rotation measurement is also not facilitated. Meanwhile, because the balance torsion spring is required to be accurately installed in the installation process, so that the moment balance of the rotating shaft and the fixed shaft at any position is ensured, the slot hole position of the balance torsion spring is fixed in the traditional measuring arm solution, the balance torsion spring can be adjusted only by adjusting the inclined stop block, and the rotating shaft and the fixed shaft are of relatively closed structures, so that the installation is very difficult, the inclined stop block position is required to be adjusted through continuous cyclic disassembly, and then the installation test is performed, so that the proper installation position of the balance torsion spring can be found, and meanwhile, huge labor and time cost are also caused.
Disclosure of Invention
In order to overcome the problems in the prior art, the invention provides the measuring arm which can realize automatic moment balance, achieve the purpose of stabilizing the gravity center, reduce the volume and the weight and reduce the installation difficulty of the balance torsion spring.
The technical scheme adopted for solving the technical problems is as follows: a measuring arm having a self-balancing shaft, comprising: the fixed shaft is of a hollow structure, and an axial fixed shaft annular groove is formed in the end face of the rear side of the fixed shaft;
the rotating sleeve comprises a rotating side cover corresponding to the rear end face of the fixed shaft and an upper cover arc plate axially parallel to the fixed shaft; the inner side surface of the rotating side cover is provided with a rotating sleeve inner groove which corresponds to the annular groove of the fixed shaft;
the connecting shaft is rotationally connected with the fixed shaft through a bearing, and one end part of the connecting shaft is connected with the rotating side cover;
the balance torsion spring is arranged in the annular groove of the fixed shaft, one end part of the balance torsion spring is fixedly arranged in the inner groove of the rotating sleeve, and the other end part of the balance torsion spring is connected with the annular groove of the fixed shaft.
Preferably, one end of the balance torsion spring is arranged in the inner groove of the rotating sleeve through an adjustable torsion spring clamp arranged on the inner groove of the rotating sleeve, and the other end of the balance torsion spring is arranged at the bottom of the annular groove of the fixed shaft through a fixed torsion spring clamp arranged at the bottom of the annular groove of the fixed shaft.
Preferably, the connecting shaft is of a hollow structure, the outer edge of the connecting shaft is of a four-stage coaxial cylinder shaft structure, and the outer edge of the fourth-stage cylinder shaft is sleeved with the encoder.
Preferably, the inner side of the rotating sleeve is a three-stage concentric hollow cylinder, the first stage is a groove in the rotating sleeve, and the second stage and the third stage are arranged on the inner side of the upper cover arc plate.
Preferably, the annular width of the annular groove of the fixed shaft is larger than the linear diameter of the balance torsion spring.
Preferably, the adjustable torsion spring clamp is of an ear-shaped structure, and the size and the width of the adjustable torsion spring clamp are matched with those of the hollow cylinder structure of the inner groove of the rotating sleeve.
Preferably, the inner wall surface of the annular groove of the fixed shaft is provided with a bearing mechanism sleeve, the bearing mechanism sleeve is of a two-stage hollow cylindrical hole structure, and the first-stage hollow cylindrical hole structure is matched with the hollow structure of the fixed shaft.
Preferably, the fixed torsion spring clamp is divided into two stages, and the appearance of the first stage is matched with the outer wall surface of the annular groove of the fixed shaft; the shape of the second stage is matched with the outer arc of the fixed shaft.
Preferably, the bearing mechanism is two bearings; the hollow structure inner wall surface of fixed axle is provided with the bulge loop, and two bearings block respectively in bulge loop both sides end.
Preferably, a sealing cover is arranged at one end of the rotating sleeve opposite to the rotating side cover; the top of the upper cover arc plate is provided with a through moving shaft sleeve; the bottom of the fixed shaft is provided with a fixed seat.
The beneficial effects of the invention are as follows: a measuring arm with self-balancing shaft is composed of a connecting shaft, a bearing mechanism and an angle encoder, and features that said bearing mechanism is installed between said connecting shaft and the internal axle sleeve of fixed shaft. The balance torsion spring is arranged between the inner shaft sleeve and the outer shaft sleeve of the fixed shaft. Therefore, the bearing mechanism can be arranged in the inner ring of the balance torsion spring, the length of the moving shaft in the horizontal direction is greatly shortened, and the volume and the weight are reduced. The rotating sleeve and the fixed shaft are respectively provided with a hollow groove at the position of installing the balance torsion spring, and the two ends of the balance torsion spring are fixed through two relatively independent torsion spring clamps, so that the installation and adjustment of the balance torsion spring can be directly completed from the outside, and the installation difficulty is greatly reduced. Meanwhile, the strip-shaped empty groove on the rotating sleeve is longer, so that an increased adjusting space is provided for the clamping groove of the adjustable torsion spring, the adjustment can be performed in a larger direction to achieve the purpose of accurately installing the balance torsion spring to realize torque balance, and meanwhile, the technical requirement on the balance torsion spring is reduced, and the manufacturing difficulty is reduced. Meanwhile, the bearing mechanism sleeve adopts softer materials to deform the balance torsion spring, so that protection and buffering are provided for the bearing mechanism, and the accuracy consistency of the measuring arm in the measuring and using process can be effectively ensured.
Drawings
The invention will be further described with reference to the drawings and examples.
FIG. 1 is a schematic view of the overall construction of a balance shaft of a measuring arm with a self-balancing device according to the present invention;
FIG. 2 is a schematic side view of a balance shaft of a measuring arm with a self-balancing device according to the present invention;
FIG. 3 is a schematic front view of a balance shaft of a measuring arm with a self-balancing device according to the present invention;
FIG. 4 is a schematic bottom view of a balance shaft of a measuring arm with a self-balancing device according to the present invention;
FIG. 5 is a schematic cross-sectional elevation view of a balance shaft of a measuring arm with a self-balancing device according to the present invention;
FIG. 6 is a schematic view of a left side cross-sectional structure of a balance shaft of a measuring arm with a self-balancing device according to the present invention;
FIG. 7 is a schematic view of a right side cross-sectional structure of a balance shaft of a measuring arm with a self-balancing device according to the present invention;
FIG. 8 is a schematic view of an adjustable torsion spring clip configuration of a measurement arm balance shaft with a self-balancing device according to the present invention;
FIG. 9 is a schematic view of a fixed torsion spring clip having a measurement arm balance shaft with a self-balancing device according to the present invention;
fig. 10-12 are schematic diagrams of the balance shaft structure of a conventional measuring arm.
Detailed Description
The invention will now be described in further detail with reference to the accompanying drawings. The drawings are simplified schematic representations which merely illustrate the basic structure of the invention and therefore show only the structures which are relevant to the invention.
Example 1
A measuring arm with a self-balancing shaft as shown in fig. 1-5, comprising: the fixed shaft 6, the fixed shaft 6 is of a hollow structure, and the rear end surface of the fixed shaft 6 is provided with an axial fixed shaft annular groove 61;
a rotating sleeve 5, wherein the rotating sleeve 5 comprises a rotating side cover 51 corresponding to the rear end surface of the fixed shaft 6 and an upper cover arc plate 52 axially parallel to the fixed shaft 6; the inner side surface of the rotary side cover 51 is provided with a rotary sleeve inner groove 53, and the rotary sleeve inner groove 53 corresponds to the fixed shaft annular groove 61;
a connecting shaft 4, wherein the connecting shaft 4 is rotatably connected with the fixed shaft 6 through a bearing mechanism 2, and one end part of the connecting shaft 4 is connected with a rotary side cover 51;
and the balance torsion spring 8 is arranged in the fixed shaft annular groove 61, one end part of the balance torsion spring 8 is fixedly arranged in the rotating sleeve inner groove 53, and the other end part is connected with the fixed shaft annular groove 61.
One end of the balance torsion spring 8 is arranged in the inner groove 53 of the rotating sleeve through an adjustable torsion spring clamp 11 arranged on the inner groove 53 of the rotating sleeve, and the other end of the balance torsion spring 8 is arranged at the bottom of the annular groove 61 of the fixed shaft through a fixed torsion spring clamp 10 arranged at the bottom of the annular groove 61 of the fixed shaft.
In this embodiment, the both ends of balanced torsional spring are connected with fixed axle and rotation cover respectively, change in order to realize automatic moment balance through balanced torsional spring torsion, reach stable focus, reduce volume and weight, reduce the installation degree of difficulty of balanced torsional spring.
Example 2
A measuring arm with a self-balancing shaft as shown in fig. 1-9, comprising: the fixed shaft 6, the fixed shaft 6 is of a hollow structure, and the rear end surface of the fixed shaft 6 is provided with an axial fixed shaft annular groove 61;
a rotating sleeve 5, wherein the rotating sleeve 5 comprises a rotating side cover 51 corresponding to the rear end surface of the fixed shaft 6 and an upper cover arc plate 52 axially parallel to the fixed shaft 6; the inner side surface of the rotary side cover 51 is provided with a rotary sleeve inner groove 53, and the rotary sleeve inner groove 53 corresponds to the fixed shaft annular groove 61;
a connecting shaft 4, wherein the connecting shaft 4 is rotatably connected with the fixed shaft 6 through a bearing mechanism 2, and one end part of the connecting shaft 4 is connected with a rotary side cover 51;
and the balance torsion spring 8 is arranged in the fixed shaft annular groove 61, one end part of the balance torsion spring 8 is fixedly arranged in the rotating sleeve inner groove 53, and the other end part is connected with the fixed shaft annular groove 61.
One end of the balance torsion spring 8 is arranged in the inner groove 53 of the rotating sleeve through an adjustable torsion spring clamp 11 arranged on the inner groove 53 of the rotating sleeve, and the other end of the balance torsion spring 8 is arranged at the bottom of the annular groove 61 of the fixed shaft through a fixed torsion spring clamp 10 arranged at the bottom of the annular groove 61 of the fixed shaft.
The connecting shaft 4 is of a hollow structure, the outer edge of the connecting shaft is of a four-stage coaxial cylinder shaft structure, and the outer edge of the fourth-stage cylinder shaft is sleeved with the encoder 3. The diameter of the outer circle of the hollow 4-level coaxial cylindrical shaft structure is sequentially reduced from the first-level cylindrical shaft structure to the fourth-level cylindrical shaft structure from left to right, so that the hollow 4-level coaxial cylindrical shaft structure is convenient to install in a echelon manner. The left end face of the first-stage cylindrical shaft structure of the connecting shaft 4 is provided with an even number of screw holes (at least 4) which are uniformly distributed and are symmetrical relative to the center of the shaft center. The connecting shaft 4 is characterized in that a second-stage cylindrical shaft structure and a third-stage cylindrical shaft structure participate in forming the bearing mechanism 2, and the third-stage cylindrical shaft structure is provided with threads, so that bearing play is eliminated through threaded fastening connection when the bearing mechanism 2 is conveniently installed. In this embodiment, the bearing mechanism 2 is two bearings.
The inner side of the rotating sleeve 5 is a three-stage coaxial hollow cylinder, the first stage is a rotating sleeve inner groove 53, and the second stage and the third stage are arranged on the inner side of the upper cover arc plate 52. The diameters of the first-stage hollow cylindrical structure and the third-stage hollow cylindrical structure are sequentially increased from left to right, and the diameters of the first-stage hollow cylindrical structure and the third-stage hollow cylindrical structure are larger than the outer diameter of the balance torsion spring 8. The balance torsion spring 8 is installed in the hollow cylinder. The left side wall of the rotating sleeve 5 is provided with an even number of counter sunk holes (at least 4) which are uniformly distributed and are symmetrical relative to the center of the hollow cylinder axis. The number and the positions of the countersunk holes are consistent with those of screw holes on the left end face of the first-stage hollow cylinder of the connecting shaft 4. The side surface of the first-stage hollow cylindrical structure of the rotating sleeve 5 is provided with a hollow groove. More than 1 screw holes are respectively formed in two sides of the empty groove, and the adjustable torsion spring clamp 11 is fixedly connected with the first-stage hollow cylinder of the connecting shaft 4 through a fastener 7. The diameter of the second-stage hollow cylindrical structure of the rotating sleeve 5 is slightly larger than that of the outer sleeve of the fixed shaft 6.
The annular width of the annular groove 61 of the fixed shaft is larger than the linear diameter of the balance torsion spring 8.
The adjustable torsion spring clamp 11 is of an ear-shaped structure, and the size and the width of the adjustable torsion spring clamp 11 are matched with those of the hollow cylinder structure of the inner groove 53 of the rotating sleeve. So as to be mounted in the hollow groove of the first-stage hollow cylindrical structure of the rotating sleeve 5. The side of the lower end of the adjustable torsion spring clamp 11 is in a moon-shaped, the inner arc is matched with the outer arc of the rotating sleeve 5, two ends of the adjustable torsion spring clamp 11 are respectively provided with two through countersunk holes, and the positions of the two ends of the through countersunk holes are consistent with the positions of screw holes at the two ends of the hollow groove of the first-stage hollow cylindrical structure of the rotating sleeve 5. The inner side of the adjustable torsion spring clamp 11 is provided with a hollow groove with an opening facing the tail end of the balance torsion spring 8, a step is arranged between the hollow groove and the lower end, and the hollow groove is conveniently installed and positioned on the side face of the first-stage hollow cylindrical structure of the rotating sleeve 5. The width of the empty slot is slightly larger than the line diameter of the balance torsion spring 8. The length of the empty slot can be precisely processed according to the gravity moment of the measured arm except the base and the fixed shaft, one end of the balance torsion spring 8 is clamped in the empty slot during installation, and the balance between the moment generated by deformation of the balance torsion spring 8 and the gravity moment of the measured arm except the base and the shaft can be realized by directly tightening and fixing the fastener 7.
The inner wall surface of the annular groove 61 of the fixed shaft is provided with a bearing mechanism sleeve 12, the bearing mechanism sleeve 12 is of a two-stage hollow cylindrical hole structure, and the first-stage hollow cylindrical hole structure is matched with the hollow structure of the fixed shaft 6. The outer diameter of the bearing mechanism sleeve 12 is smaller than the inner diameter of the balance torsion spring 8, the first-stage inner diameter of the larger-diameter hollow cylindrical hole is slightly larger than the outer diameter of the shaft sleeve in the fixed shaft 6, the second-stage end face of the smaller-diameter hollow cylindrical hole is provided with at least 1 penetrating countersunk holes which are uniformly distributed and symmetrical relative to the center of the shaft center, and the positions and the number of the penetrating countersunk holes are consistent with the positions and the number of screw holes of the left end face of the shaft sleeve in the fixed shaft 6. The bearing mechanism sleeve 12 is made of softer materials, the surface is smooth, buffer protection is provided for the inner sleeve of the fixed shaft 6 when the balance torsion spring 8 deforms, the inner sleeve of the fixed shaft 6 is prevented from being extruded to deform when the balance torsion spring 8 deforms, and meanwhile friction force between the balance torsion spring 8 and the bearing mechanism sleeve 12 is reduced, so that positioning accuracy of rotation measurement of the measuring arm is guaranteed.
The fixed torsion spring clamp 10 is divided into two stages, and the appearance of the first stage is matched with the outer wall surface of the fixed shaft annular groove 61; the profile of the second stage matches the outer arc of the fixed shaft 6. The first stage has an empty slot with an opening facing the tail end of the balance torsion spring 8, and the width of the empty slot is slightly larger than the wire diameter of the balance torsion spring 8. The second stage is arc structure, and the area is greater than the empty slot of the outer axle sleeve of fixed axle 6. The second-stage inner arc is matched with the outer arc of the fixed shaft 6, and the second-stage edge of the fixed torsion spring clamp 10 is provided with three through countersunk holes, and the positions of the through countersunk holes are consistent with the positions and the numbers of screw holes around the empty slot of the fixed shaft 6. During installation, the fixed torsion spring clamp 10 is installed and fixed at the empty slot of the fixed shaft 6 through the fastener 7, and the right end of the balance torsion spring 8 is clamped through the empty slot of the first stage.
The bearing mechanism 2 is two bearings; the hollow structure inner wall surface of the fixed shaft 6 is provided with a convex ring, and two bearings are respectively clamped at two side ends of the convex ring. The part of the fixed shaft 6, on which the self-balancing device is arranged, is divided into two coaxial shaft sleeves connected at the right end, and a fixed shaft annular groove 61 is formed between the two coaxial shaft sleeves. The inner sleeve participates in the composition of the bearing mechanism 2. The bearing part is arranged on the inner circular surface of the inner shaft sleeve, the diameter of the three-stage hollow concentric cylindrical hole structure is equal to that of the third-stage hollow cylindrical hole structure from left to right, and the diameter of the outer circular ring of the bearing is slightly larger than that of the outer circular ring of the bearing. The two bearings are respectively arranged between the first-stage hollow cylindrical hole structure of the shaft sleeve in the fixed shaft 6 and the second-stage cylindrical shaft structure of the connecting shaft 4, and between the third-stage hollow cylindrical hole structure and the second-stage cylindrical shaft structure of the connecting shaft 4. The left end face of the inner shaft sleeve is provided with more than two screw holes which are uniformly distributed and are symmetrical relative to the center of the shaft center. The diameter of the outer circle of the outer shaft sleeve is slightly smaller than that of the second-stage hollow cylindrical structure of the rotating sleeve 5, the diameter of the inner circle of the outer shaft sleeve is equal to that of the first-stage hollow cylindrical structure of the rotating sleeve 5, and the diameter of the outer circle of the outer shaft sleeve is larger than that of the balance torsion spring 8. The balance torsion spring 8 is arranged in the annular groove 61 of the fixed shaft between the inner shaft sleeve and the outer shaft sleeve of the fixed shaft 6. The outer shaft of the fixed shaft 6 is sleeved with a hollow groove near the right end of the balance torsion spring 8, and three isosceles triangle distributed screw holes are formed around the hollow groove.
A sealing cover 54 is arranged at the end of the rotating sleeve 5 opposite to the rotating side cover 51; the top of the upper cover arc plate 52 is provided with a through moving shaft sleeve 55; a fixing seat 62 is arranged at the bottom of the fixed shaft 6.
In the invention, the connecting shaft is directly connected with the bearing mechanism and the angle encoder in series, and the bearing mechanism is arranged between the connecting shaft and the inner shaft sleeve of the fixed shaft. The balance torsion spring is arranged between the inner shaft sleeve and the outer shaft sleeve of the fixed shaft. Therefore, the bearing mechanism can be arranged in the inner ring of the balance torsion spring, the length of the balance shaft in the horizontal direction is greatly shortened, and the volume and the weight are reduced. The rotating sleeve and the fixed shaft are respectively provided with a hollow groove at the position of installing the balance torsion spring, and the two ends of the balance torsion spring are fixed through two relatively independent torsion spring clamps, so that the installation and adjustment of the balance torsion spring can be directly completed from the outside, and the installation difficulty is greatly reduced. Meanwhile, the strip-shaped empty groove on the rotating sleeve is longer, so that an increased adjusting space is provided for the clamping groove of the adjustable torsion spring, the adjustment can be performed in a larger direction to achieve the purpose of accurately installing the balance torsion spring to realize torque balance, and meanwhile, the technical requirement on the balance torsion spring is reduced, and the manufacturing difficulty is reduced. Meanwhile, the bearing mechanism sleeve adopts softer materials to deform the balance torsion spring, so that protection and buffering are provided for the bearing mechanism, and the accuracy consistency of the measuring arm in the measuring and using process can be effectively ensured.
With the above-described preferred embodiments according to the present invention as an illustration, the above-described descriptions can be used by persons skilled in the relevant art to make various changes and modifications without departing from the scope of the technical idea of the present invention. The technical scope of the present invention is not limited to the description, but must be determined according to the scope of claims.
Claims (6)
1. A measuring arm having a self-balancing shaft, comprising: the fixed shaft is of a hollow structure, and an axial fixed shaft annular groove is formed in the end face of the rear side of the fixed shaft;
the rotating sleeve comprises a rotating side cover corresponding to the rear end face of the fixed shaft and an upper cover arc plate axially parallel to the fixed shaft; the inner side surface of the rotating side cover is provided with a rotating sleeve inner groove which corresponds to the annular groove of the fixed shaft;
the connecting shaft is rotationally connected with the fixed shaft through a bearing, and one end part of the connecting shaft is connected with the rotating side cover;
the balance torsion spring is arranged in the annular groove of the fixed shaft, one end part of the balance torsion spring is fixedly arranged in the inner groove of the rotating sleeve, and the other end part of the balance torsion spring is connected with the annular groove of the fixed shaft;
one end of the balance torsion spring is arranged in the inner groove of the rotating sleeve through an adjustable torsion spring clamp arranged on the inner groove of the rotating sleeve, and the other end of the balance torsion spring is arranged at the bottom of the annular groove of the fixed shaft through a fixed torsion spring clamp arranged at the bottom of the annular groove of the fixed shaft;
the connecting shaft is of a hollow structure, the outer edge of the connecting shaft is of a four-stage coaxial cylinder shaft structure, and the outer edge of the fourth-stage cylinder shaft is sleeved with an encoder;
the inner wall surface of the annular groove of the fixed shaft is provided with a bearing mechanism sleeve, the bearing mechanism sleeve is of a two-stage hollow cylindrical hole structure, and the first-stage hollow cylindrical hole structure is matched with the hollow structure of the fixed shaft;
the bearing mechanism is two bearings; the hollow structure inner wall surface of fixed axle is provided with the bulge loop, and two bearings block respectively in bulge loop both sides end.
2. The measuring arm with the self-balancing shaft according to claim 1, wherein the inner side of the rotating sleeve is a three-stage coaxial hollow cylinder, the first stage is a groove in the rotating sleeve, and the second stage and the third stage are arranged on the inner side of the upper cover arc plate.
3. The measuring arm with self-balancing shaft of claim 1, wherein the annular width of the annular groove of the fixed shaft is larger than the wire diameter of the balancing torsion spring.
4. The measuring arm with self-balancing shaft according to claim 1, wherein the adjustable torsion spring clip has an ear-shaped structure, and the dimension width of the adjustable torsion spring clip is matched with the hollow cylindrical structure of the groove in the rotating sleeve.
5. The measuring arm with self-balancing shaft according to claim 1, wherein the fixed torsion spring clamping hoop is divided into two stages, and the shape of the first stage is matched with the outer wall surface of the annular groove of the fixed shaft; the shape of the second stage is matched with the outer arc of the fixed shaft.
6. A measuring arm with a self-balancing shaft according to claim 1, characterized in that the end of the swivel sleeve opposite the swivel side cover is provided with a cover; the top of the upper cover arc plate is provided with a through moving shaft sleeve; the bottom of the fixed shaft is provided with a fixed seat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810295264.2A CN108204795B (en) | 2018-04-04 | 2018-04-04 | Measuring arm with self-balancing shaft |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810295264.2A CN108204795B (en) | 2018-04-04 | 2018-04-04 | Measuring arm with self-balancing shaft |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN108204795A CN108204795A (en) | 2018-06-26 |
| CN108204795B true CN108204795B (en) | 2024-01-23 |
Family
ID=62606827
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810295264.2A Active CN108204795B (en) | 2018-04-04 | 2018-04-04 | Measuring arm with self-balancing shaft |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108204795B (en) |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101625238A (en) * | 2009-08-06 | 2010-01-13 | 浙江大学 | Automatically adjusting balance method of gage beam of flexible coordinate measuring machine and balance joint |
| CN202471005U (en) * | 2012-03-28 | 2012-10-03 | 广州市机电高级技工学校 | Portable coordinate measuring machine swinging joint with balance mechanism |
| CN106042006A (en) * | 2016-06-13 | 2016-10-26 | 重庆金山科技（集团）有限公司 | Reducer anti-torque structure of medical robot |
| US9803973B1 (en) * | 2017-04-13 | 2017-10-31 | Sa08700334 | Ultra-light and ultra-accurate portable coordinate measurement machine |
| GB201801290D0 (en) * | 2017-01-27 | 2018-03-14 | Faro Tech Inc | Articulated arm coordinate measuring machine |
| CN208075811U (en) * | 2018-04-04 | 2018-11-09 | 广州市精谷智能科技有限公司 | A kind of measuring arm with self-balancing axis |
-
2018
- 2018-04-04 CN CN201810295264.2A patent/CN108204795B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101625238A (en) * | 2009-08-06 | 2010-01-13 | 浙江大学 | Automatically adjusting balance method of gage beam of flexible coordinate measuring machine and balance joint |
| CN202471005U (en) * | 2012-03-28 | 2012-10-03 | 广州市机电高级技工学校 | Portable coordinate measuring machine swinging joint with balance mechanism |
| CN106042006A (en) * | 2016-06-13 | 2016-10-26 | 重庆金山科技（集团）有限公司 | Reducer anti-torque structure of medical robot |
| GB201801290D0 (en) * | 2017-01-27 | 2018-03-14 | Faro Tech Inc | Articulated arm coordinate measuring machine |
| US9803973B1 (en) * | 2017-04-13 | 2017-10-31 | Sa08700334 | Ultra-light and ultra-accurate portable coordinate measurement machine |
| CN208075811U (en) * | 2018-04-04 | 2018-11-09 | 广州市精谷智能科技有限公司 | A kind of measuring arm with self-balancing axis |
Also Published As
| Publication number | Publication date |
|---|---|
| CN108204795A (en) | 2018-06-26 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10801909B2 (en) | Device for measuring and adjusting inertia of test model of offshore structure and method for using the same | |
| CN109765002B (en) | Combined static pressure air bearing supporting mechanism | |
| CN208765636U (en) | Claw-type deep hole inner diameter measuring device | |
| CN108204795B (en) | Measuring arm with self-balancing shaft | |
| CN102937457A (en) | Four-dimensional adjusting table for optical detection | |
| CN109115083A (en) | Claw-type deep hole inner diameter measuring device and measuring method | |
| CN111055167B (en) | Indexing two-link type ball rod instrument and method for detecting machine tool precision by using same | |
| CN113686682A (en) | Online detection device for base film of solar backboard and working method of online detection device | |
| CN218724042U (en) | Inner hole detection device | |
| CN111855183A (en) | Multi-degree-of-freedom motion branched chain resolution testing platform and testing method | |
| CN108709483B (en) | Axial play testing device of ball screw | |
| CN110778870A (en) | Expandable portable multi-freedom-degree and multi-view camera support | |
| CN213688186U (en) | Centering frock and motor test system's centering frock | |
| CN111504164B (en) | Steering gear input shaft coaxiality detection device | |
| US3638324A (en) | Gage | |
| CN108680132B (en) | Semi-automatic inner diameter detection device | |
| CN110360916B (en) | V-shape positioning type internal diameter and external diameter comparison measuring instrument | |
| CN208075811U (en) | A kind of measuring arm with self-balancing axis | |
| CN208920984U (en) | A kind of cubing detected for differential assembly precision and tooth runout | |
| CN210160199U (en) | High-precision bending machine rear stop finger | |
| CN108955459A (en) | A kind of detection method of cubing and differential assembly precision | |
| CN107219559B (en) | Photoelectric sensor suitable for high-precision occasions needing to detect tiny objects | |
| CN111059977A (en) | Multifunctional special detecting instrument for spherical surface and end surface of outer spherical surface bearing | |
| CN201104209Y (en) | Gear two-sided engaging multidimensional measuring mechanism | |
| CN110500940B (en) | Clamp for measuring flatness around hole |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| CB02 | Change of applicant information | ||
| CB02 | Change of applicant information |
Address after: 510000, No. 6 Shilou Road, Shilian Road, Shilou Town, Panyu District, Guangzhou City, Guangdong Province (Part of the first floor area of Building 1) Applicant after: Guangzhou Jinggu Intelligent Equipment Co.,Ltd. Address before: Floor 3, Plant, No. 80, the Pearl River Road, Shilou Town, Panyu District, Guangzhou, Guangdong 510000 Applicant before: GUANGZHOU ACCUGLEN INTELLIGENT TECH LTD. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |