Standardized durable flexible supporting and positioning column

Abstract

The invention relates to a standardized durable flexible supporting and positioning column which comprises a bottom plate, an outer square pipe, an inner square pipe, a locking mechanism and a plurality of pairs of sliding groove pin assemblies. The paired sliding groove pin assemblies are used for guiding the inner square pipe to ascend and descend relative to the outer square pipe, the acting force of the first ball head spring plungers on the surface of the inner square pipe is small, the contact position is along several limited straight lines, and even if the inner square pipe is slightly abraded, vertical ascending and descending of the inner square pipe can be kept; according to the locking mechanism, positioning is completed by inserting a positioning pin into an inner standard positioning hole, the step pitch is accurate, the bearing capacity in the vertical direction is large, the problem that the positioning precision is reduced due to abrasion is not prone to occurring, and the service life of the whole flexible supporting positioning column is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of positioning devices, and in particular to a standardized durable flexible support positioning column. Background Art

[0002] At present, the speed of automobile renewal is relatively fast, and automobiles with different energy forms are gradually being recognized by the market. OEMs need to update more models to meet market demand. Because each model needs to customize a full set of three-coordinate measurement brackets. This not only increases costs, but also takes up more equipment storage space. This results in the dilemma that the old brackets have not reached the scrap age, and there is nowhere to put the new brackets.

[0003] Chinese patent CN105751107A discloses a flexible clamping mechanism, including an outer precision aluminum profile and an inner slide rail, the latter can be lifted and retracted in the middle of the former, a sleeve is fixed on the upper part of the precision aluminum profile, and the sleeve is fixed by two locking handles against the side of the slide rail. This structure cannot complete the adjustment of equal distances, and the locking handle must have a large enough force to press the side of the slide rail to ensure the relative position between the precision aluminum profile and the slide rail, which can easily cause the outer concave deformation of the slide rail, and this loss will reduce the service life of the mechanism.

[0004] Chinese patent CN113418479A discloses a precision flexible measurement and positioning support column, which includes an outer support column and an inner sliding rod, the latter can be lifted and retracted in the middle of the former, a two-way control sleeve is fixed on the upper part of the support column, a tooth-shaped block is provided on one edge of the sliding rod, and the support column is fixed by pressing on the tooth-shaped block through a pull-out locking positioning mechanism. The tooth-shaped block here is also a vulnerable part, and it is not easy to maintain the accuracy when adjusting the equal distance.

[0005] Therefore, it is necessary to provide a new supporting positioning column to solve the above problems. Summary of the invention

[0006] The main purpose of the present invention is to provide a standardized and durable flexible support positioning column, which can achieve equal-interval precision adjustment of the telescopic amount with standardized parts, while having low part loss, ensuring positioning accuracy and extending the service life of the entire mechanism.

[0007] The present invention achieves the above-mentioned object through the following technical solutions: A standardized durable flexible support positioning column, comprising a bottom plate, an outer square tube fixed to the bottom plate, an inner square tube lifted and lowered in the vertical direction inside the outer square tube, a locking mechanism for limiting the relative position of the outer square tube and the inner square tube, and a plurality of pairs of slide pin assemblies located between the outer square tube and the inner square tube; Each side of the outer square tube is arrayed with three rows of outer standard positioning holes, each side of the inner square tube is arrayed with two rows of inner standard positioning holes, and the outer square tube is also provided with an embedded hole, which occupies the area where the three outer standard positioning holes arranged on the left and right are located; The slide pin assembly is used in pairs in the front-to-back direction or the left-to-right direction, and two slide pins are used side by side in each direction, each slide pin assembly includes a slide pin and a pair of first ball head spring plungers, each slide pin passes through one of the left and right outer standard positioning holes at the same height on the same side of the outer square tube, the slide pin is provided with a slide groove matching the outer surface of the inner square tube, and a pair of ball head spring plungers are embedded in the bottom surface of the slide groove and used to contact the outer side surface of the inner square tube; The locking mechanism is a quick clamping mechanism that drives the compression block to expand and contract by the rotation of the handle. The compression block is provided with a positioning pin. The compression block expands and contracts in the embedding hole. The positioning pin is inserted into the inner standard positioning hole to complete the positioning of the outer square tube and the inner square tube.

[0008] Specifically, the diameter of the outer standard positioning hole and the diameter of the inner standard positioning hole are both D, the center distance between adjacent outer standard positioning holes and the center distance between adjacent inner standard positioning holes are both 2D, the side length of the outer square tube is 6D, the side length of the inner square tube is 4D, and the hole margins are both D.

[0009] Specifically, two pairs of adjustment holes are distributed on each side of the outer square tube, and each pair of adjustment holes are arranged at the same height on the same side, and the center of the adjustment hole is located at the symmetrical center of the two adjacent outer standard positioning holes on its left and right; each slide pin assembly also includes a pair of adjustment screws, and the two adjustment screws pass through the adjustment holes and abut against the opposite surface of the bottom surface of the groove.

[0010] Specifically, the locking mechanism also includes a locking seat, a central axis, a pin shaft and two rollers, the locking seat is fixed to one side surface of the outer square tube, the front of the locking seat is provided with a cylindrical portion, and the middle portion is provided with a guide groove, the axial direction of the cylindrical portion and the penetration direction of the guide groove are both located in a first horizontal direction, the first horizontal direction is perpendicular to the side surface of the outer square tube where the locking mechanism is located, the pressing block moves along the first horizontal direction within the range surrounded by the guide groove and the embedding hole; the central axis penetrates the cylindrical portion along the first horizontal direction, the inner end of the central axis is rotatably connected to the pressing block, and the outer end The handle is connected; two positioning pins are arranged side by side on the inner side of the pressing block, and the positions and sizes of the two positioning pins match a pair of adjacent inner standard positioning holes on the left and right; the pin shaft radially passes through the middle of the central axis and the two ends of the pin shaft are respectively rotatably connected to a roller, and two rotating grooves are centrally symmetrically distributed on the cylindrical part, and the roller moves within the range of the rotating groove, and the rotating groove has a straight section and a curved section connected head to tail; when the roller reaches the end of the straight section, the two positioning pins are embedded in the two inner standard positioning holes; when the roller reaches the end of the curved section, the two positioning pins completely withdraw from the two inner standard positioning holes.

[0011] Furthermore, the locking mechanism also includes a protective shell, which is fixed outside the cylindrical portion and covers the two rollers.

[0012] Furthermore, the locking mechanism also includes two second ball head spring plungers, which respectively pass through the opposite sides of the locking seat and the ball heads thereof bear against the sides of the pressure block.

[0013] Furthermore, a pair of semicircular protrusions are provided on the reverse side of the locking seat, and the semicircular protrusions are located outside the horizontal projection range of the guide groove and match the local edge of the embedding hole.

[0014] The beneficial effects of the technical solution of the present invention are: The present invention uses a pair of slide pin assemblies to guide the lifting and lowering of the inner square tube relative to the outer square tube. The first ball head spring plunger has a small force on the surface of the inner square tube, and the contact position is along a limited number of straight lines. Even if there is a slight wear, the inner square tube can be kept lifted vertically. The locking mechanism uses a positioning pin to insert into an inner standard positioning hole to complete the positioning. The step distance is accurate and the vertical bearing capacity is large. It is not easy to cause the problem of reduced positioning accuracy due to wear, thereby extending the service life of the entire flexible support positioning column. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 A three-dimensional diagram of a standardized durable flexible support and positioning column in the embodiment in use; Figure 2 It is a three-dimensional diagram of the outer square tube; Figure 3A three-dimensional diagram of the spatial distribution of all slide pin components; Figure 4 It is a connection diagram of the outer square tube, the locking mechanism and the slide pin assembly; Figure 5 is a three-dimensional diagram of the locking mechanism; Figure 6 It is an exploded diagram of the locking mechanism; Figure 7 is a cross-sectional view of the locking mechanism; Figure 8 It is a three-dimensional diagram of the locking seat.

[0016] The numbers in the figure represent: 1-Flexible support positioning column, 11- Bottom plate, 12-external square tube, 121-external standard positioning hole, 122-embedded hole, 13-inner square tube, 131-inner standard positioning hole, 14-locking mechanism, 141-locking seat, 1411-cylindrical part, 14111-rotation groove, 1412-guide groove, 1413-semicircular protrusion, 142-central axis, 143-handle, 144-pin shaft, 145-roller, 146-pressing block, 147-locating pin, 148-protective shell, 149-second ball head spring plunger, 15-slide pin assembly, 151-slide pin, 1511-slide, 152-first ball head spring plunger, 153-adjusting screw; 2- Measuring mechanism; 3-Quick change clamp. DETAILED DESCRIPTION

[0017] The present invention is further described in detail below with reference to specific embodiments.

[0018] Example: like Figures 1 to 4 As shown, a standardized durable flexible support positioning column 1 of the present invention includes a base plate 11, an outer square tube 12 fixed on the base plate 11, an inner square tube 13 raised and lowered in the outer square tube 12 along the vertical direction, a locking mechanism 14 for limiting the relative position of the outer square tube 12 and the inner square tube 13, and a plurality of pairs of slide pin assemblies 15 located between the outer square tube 12 and the inner square tube 13.

[0019] In this embodiment, the flexible support and positioning column 1 is fixed on the working surface by the bottom plate 11, and the height of the inner square tube 13 in the outer square tube 12 is adjusted and intermittently fixed by the locking mechanism 14, and the interval distance is adjusted and fixed. The top of the inner square tube 13 is exposed from the outer square tube 12 and the measuring mechanism 2 can be fixed by the quick-change clamp 3. Therefore, the position of the measuring mechanism 2 can be adjusted in height in equal quantities according to actual needs.

[0020] like Figure 1 and Figure 2 As shown, each side of the outer square tube 12 is arrayed with three rows of outer standard positioning holes 121, and each side of the inner square tube 13 is arrayed with two rows of inner standard positioning holes 131. The diameter of the outer standard positioning holes 121 and the diameter of the inner standard positioning holes 131 are both D, and the hole center distance between adjacent outer standard positioning holes 121 and the hole center distance between adjacent inner standard positioning holes 131 are both 2D. The side length of the outer square tube 12 is 6D, and the side length of the inner square tube 13 is 4D, and the hole margins are both D. An embedded hole 122 is also provided on the outer square tube 12, and the embedded hole 122 occupies the area where the three outer standard positioning holes 121 arranged on the left and right are located. Two pairs of adjustment holes 123 are distributed on each side of the outer square tube 12, and each pair of adjustment holes 123 are arranged at the same height on the same side, and the center of the adjustment hole 123 is located at the symmetrical center of the two adjacent outer standard positioning holes 121 on the left and right.

[0021] The layout rules of the outer standard positioning holes 121 and the inner standard positioning holes 131 are the same, except that the size of the inner square tube 13 is smaller than that of the outer square tube 12, so as to realize the lifting and retracting of the inner square tube 13 in the outer square tube 12. The hole center distance refers to the distance between the center of a standard positioning hole (referring to the outer standard positioning hole 121 or the inner standard positioning hole 131) and the center of the adjacent standard positioning hole of the same type, and the hole margin refers to the distance between the standard positioning hole closest to the edge of the square tube (referring to the outer square tube 12 or the inner square tube 13) and the edge. Because the outer standard positioning holes 121 and the inner standard positioning holes 131 have the same arrangement rules, and the hole center distance is 2D, the length of each interval of 2D can be fixed once, and the step distance is accurate. All parts of the flexible support positioning column 1 can be made into standard parts, and the structure is standardized, flexible, and modular, so as to flexibly adapt to the size positioning requirements of the measuring mechanism 2.

[0022] like Figure 3 and Figure 4 As shown, each slot pin assembly 15 includes a slot pin 151, a pair of first ball spring plungers 152 and a pair of adjustment screws 153. Each slot pin 151 passes through one of the left and right outer standard positioning holes 121 at the same side and height of the outer square tube 12. The slot pin 151 is provided with a slot 1511 matching the outer surface of the inner square tube 13. A pair of first ball spring plungers 152 are embedded in the bottom surface of the slot 1511 and are used to contact the outer side surface of the inner square tube 13. Two adjustment screws 153 pass through the adjustment holes 123 and abut against the opposite surface of the bottom surface of the slot. The slot pin assembly 15 is used in pairs in the front-to-back direction or the left-to-right direction, and two slot pins 151 are used side by side in each direction.

[0023] The outer wall of the inner square tube 13 is not in direct contact with the inner wall of the outer square tube 12. The slide grooves 1511 of the left and right slide groove pins 151 at the same height are opposite, so that all the slide grooves 1511 can enclose a rectangular columnar telescopic space of the inner square tube 13. Because the axis of the slide groove pin 151 should be flush with the outer wall of the inner square tube 13 in theory, according to the spatial relationship between the inner square tube 13, the outer square tube 12 and the slide groove pin 151, the depth of the slide groove 1511 is about D / 2. The contact position between the inner square tube 13 and the slide groove assembly 15 is on the ball head of the first ball head spring plunger 152, so that the inner square tube 13 is subjected to rolling friction when it is telescoped. The first ball head spring plunger 152 in the same direction is distributed in the four corners of a rectangle, and the ball head contacts the surface of the inner square tube 13 during rolling, and will not pass through the inner standard positioning hole 131. The first ball spring plunger 152 exerts little force on the surface of the inner square tube 13, and the contact position is along a limited number of straight lines, so that even if there is slight wear, the inner square tube 13 can be kept vertically lifted. The slot pin 151 is fixed to the adjustment hole 123 by the adjustment screw 153, so that the slot pin 151 will not rotate freely in the outer standard positioning hole 121.

[0024] like Figures 4 to 8As shown, the locking mechanism 14 includes a locking seat 141, a central axis 142, a rotating handle 143, a pin 144, two rollers 145, a pressing block 146, two positioning pins 147, a protective shell 148 and two second ball head spring plungers 149. The locking seat 141 is fixed to one side of the outer square tube 12, and the front of the locking seat 141 is provided with a cylindrical portion 1411, the middle is provided with a guide groove 1412, and the back is provided with a pair of semicircular protrusions 1413. The axial direction of the cylindrical portion 1411 and the penetration direction of the guide groove 1412 are both located in the first horizontal direction, and the first horizontal direction is perpendicular to the side of the outer square tube 12 where the locking mechanism 14 is located. The central axis 142 penetrates the cylindrical portion 1411 along the first horizontal direction, the inner end of the central axis 142 is rotatably connected to the pressure block 146, and the outer end is connected to the handle 143; two positioning pins 147 are arranged side by side on the inner side of the pressure block 146, and the positions and sizes of the two positioning pins 147 match a pair of adjacent inner standard positioning holes 131 on the left and right; the semicircular protrusion 1413 is located outside the horizontal projection range of the guide groove 1412 and matches the local edge of the embedding hole 122, and the pressure block 146 moves along the first horizontal direction within the range surrounded by the guide groove 1412 and the embedding hole 122. The pin 144 passes through the middle of the central axis 142 in the radial direction, and the two ends of the pin 144 are rotatably connected to a roller 145. Two rotation grooves 14111 are centrally symmetrically distributed on the cylindrical portion 1411. The roller 145 moves within the range of the rotation groove 14111. The rotation groove 14111 has a straight segment and a curved segment connected head to tail. When the roller 145 reaches the end of the straight segment, the two positioning pins 147 are embedded in the two internal standard positioning holes 131. When the roller 145 reaches the end of the curved segment, the two positioning pins 147 completely withdraw from the two internal standard positioning holes 131. The curved segment enables the handle 143 to apply a large axial feed force to the central axis 142 with a very small rotation angle, and the operation is faster and more convenient than screwing a screw. The straight section has a stop function for the roller 145 and has a large bearing capacity, which can prevent the positioning pin 147 from falling out of the inner standard positioning hole 131 under the downward pressure of the inner square tube 13, thereby ensuring the stability of the relative position between the inner square tube 13 and the outer square tube 12. The protective shell 148 is fixed outside the cylindrical portion 1411 and shields the two rollers 145. The two second ball head spring plungers 149 pass through the opposite sides of the locking seat 141 respectively, and their ball heads press against the sides of the pressure block 146.

[0025] The locking mechanism 14 is a quick clamping mechanism that drives the pressure block 146 to expand and contract by the rotation of the turning handle 143. The pressure block 146 expands and contracts in the embedded hole 122. The positioning pin 147 provided on the pressure block 146 completes the positioning of the outer square tube 12 and the inner square tube 13 by inserting into the inner standard positioning hole 131. The positioning pin 147 has a large bearing capacity in the vertical direction and is not prone to the problem of reduced positioning accuracy due to wear, thereby extending the service life of the entire flexible support positioning column 1. The semicircular protrusion 1413 achieves the limitation of the locking seat 141 by cooperating with the embedded hole 122. The rotation of the central axis 142 is completed by operating the turning handle 143. The turning handle 143 can extend the force arm, making it easier to rotate the central axis 142. The roller 145 can reduce the friction between it and the inner wall of the rotating groove 14111, making the operation smooth. Because the rotating groove 14111 allows the roller 145 to move along the first horizontal direction while rotating, the central axis 142 will also move the pressing block 146 along the first horizontal direction, thereby causing the positioning pin 147 to press against the inner wall of the inner standard positioning hole 131 or to escape from the inner square tube 13. When the positioning pin 147 presses against the inner wall of the inner standard positioning hole 131, the inner square tube 13 is locked; when the positioning pin 147 escapes from the inner square tube 13, the expansion and contraction amount of the inner square tube 13 can be adjusted. The two second ball head spring plungers 149 are used to prevent the pressing block 146 from contacting the side wall of the guide groove 1412, so as to avoid the sliding friction from hindering the expansion and contraction of the pressing block 146. The protective shell 148 can be used to prevent foreign matter from entering the rotating groove 14111 and hindering the movement of the roller 145, and can also prevent people's hands from being pinched, thereby improving the safety of operation. In this embodiment, the protective shell 148 is fixed to the outside of the cylindrical portion 1411 by means of a top screw passing through its side wall.

[0026] The above are only some embodiments of the present invention. For those skilled in the art, several modifications and improvements can be made without departing from the creative concept of the present invention, which all belong to the protection scope of the present invention.

Claims

1. A standardized durable flexible support and positioning column, characterized in that: It comprises a bottom plate, an outer square tube fixed on the bottom plate, an inner square tube lifted and lowered in the vertical direction in the outer square tube, a locking mechanism for limiting the relative position of the outer square tube and the inner square tube, and a plurality of pairs of slide pin assemblies located between the outer square tube and the inner square tube; Each side of the outer square tube is arrayed with three rows of outer standard positioning holes, each side of the inner square tube is arrayed with two rows of inner standard positioning holes, and the outer square tube is also provided with an embedded hole, which occupies the area where the three outer standard positioning holes arranged on the left and right are located; The slide pin assembly is used in pairs in the front-to-back direction or the left-to-right direction, and two slide pins are used side by side in each direction, each slide pin assembly includes a slide pin and a pair of first ball head spring plungers, each slide pin passes through one of the left and right outer standard positioning holes at the same height on the same side of the outer square tube, the slide pin is provided with a slide groove matching the outer surface of the inner square tube, and a pair of ball head spring plungers are embedded in the bottom surface of the slide groove and used to contact the outer side surface of the inner square tube; The locking mechanism is a quick clamping mechanism that drives the compression block to expand and contract by the rotation of the handle. The compression block is provided with a positioning pin. The compression block expands and contracts in the embedding hole. The positioning pin is inserted into the inner standard positioning hole to complete the positioning of the outer square tube and the inner square tube.

2. The standardized durable flexible support and positioning column according to claim 1, characterized in that: The diameter of the outer standard positioning hole and the diameter of the inner standard positioning hole are both D, the center distance between adjacent outer standard positioning holes and the center distance between adjacent inner standard positioning holes are both 2D, the side length of the outer square tube is 6D, the side length of the inner square tube is 4D, and the hole margins are both D.

3. The standardized durable flexible support and positioning column according to claim 1, characterized in that: Two pairs of adjustment holes are distributed on each side of the outer square tube, and each pair of adjustment holes are arranged at the same height on the same side, and the center of the adjustment hole is located at the symmetrical center of the two adjacent outer standard positioning holes on its left and right; each slide pin assembly also includes a pair of adjustment screws, and the two adjustment screws pass through the adjustment holes and abut against the opposite surface of the bottom surface of the groove.

4. The standardized durable flexible support and positioning column according to claim 3, characterized in that: The locking mechanism also includes a locking seat, a central axis, a pin and two rollers, the locking seat is fixed on one side of the outer square tube, the front of the locking seat is provided with a cylindrical portion, the middle portion is provided with a guide groove, the axial direction of the cylindrical portion and the penetration direction of the guide groove are both located in a first horizontal direction, the first horizontal direction is perpendicular to the side of the outer square tube where the locking mechanism is located, the pressing block moves along the first horizontal direction within the range surrounded by the guide groove and the embedding hole; the central axis penetrates the cylindrical portion along the first horizontal direction, the inner end of the central axis is rotatably connected to the pressing block, and the outer end is connected The turning handle; two positioning pins are arranged side by side on the inner side of the pressing block, and the positions and sizes of the two positioning pins match a pair of adjacent inner standard positioning holes on the left and right; the pin shaft radially passes through the middle of the central axis and the two ends of the pin shaft are rotatably connected to a roller, and two rotating grooves are centrally symmetrically distributed on the cylindrical part, and the roller moves within the range of the rotating groove, and the rotating groove has a straight segment and a curved segment connected head to tail; when the roller reaches the end of the straight segment, the two positioning pins are embedded in the two inner standard positioning holes; when the roller reaches the end of the curved segment, the two positioning pins completely withdraw from the two inner standard positioning holes.

5. The standardized durable flexible support and positioning column according to claim 4, characterized in that: The locking mechanism also includes a protective shell, which is fixed outside the cylindrical portion and covers the two rollers.

6. The standardized durable flexible support and positioning column according to claim 4, characterized in that: The locking mechanism also includes two second ball head spring plungers, which respectively pass through the opposite sides of the locking seat and the ball heads of the two second ball head spring plungers bear against the sides of the pressure block.

7. The standardized durable flexible support and positioning column according to claim 4, characterized in that: A pair of semicircular protrusions are provided on the reverse side of the locking seat. The semicircular protrusions are located outside the horizontal projection range of the guide groove and match the local edge of the embedding hole.

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