A standardized durable flexible support positioning column

Abstract

The present invention relates to a standardized durable flexible support positioning column, which comprises a bottom plate, an outer square tube, an inner square tube, a locking mechanism and multiple pairs of chute pin assemblies. In the present invention, the paired chute pin assemblies are used to guide the lifting of the inner square tube relative to the outer square tube. The acting force of the first ball head spring plunger on the surface of the inner square tube is small, and the contact positions are along several limited straight lines. Even if there is slight wear, the inner square tube can still be lifted vertically. The locking mechanism uses a positioning pin to insert into the inner standard positioning hole for positioning, with accurate pitch and large vertical bearing capacity, and it is not easy to cause problems of reduced positioning accuracy due to wear, thus extending the service life of the entire flexible support positioning column.

Description

Technical Field

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

[0002] At the present stage, the update speed of automobiles is relatively fast, and automobiles with different energy forms are gradually recognized by the market. The main engine factories need to update more models to meet the market demand. Since a complete set of three-coordinate measuring brackets need to be customized for each model. This not only increases the cost but also occupies more equipment storage space. It has caused a dilemma that the old brackets have not reached the end-of-life years, and there is no place to store the new brackets.

[0003] Chinese Patent CN105751107A discloses a flexible clamping mechanism, which includes a precision aluminum profile on the outside and a slide rail on the inside. The latter can lift and stretch in the former. A sliding sleeve is fixed on the upper part of the precision aluminum profile, and two locking handles are used to press against the side of the slide rail on the sliding sleeve to complete the fixation. This structure cannot complete equidistant adjustment, and a sufficient large force is required to press the side of the slide rail by the locking handle to ensure the relative position between the precision aluminum profile and the slide rail. This is likely to cause external depression and deformation of the slide rail, and this kind of loss will reduce the service life of the mechanism.

[0004] Chinese Patent CN113418479A discloses a precision flexible measurement positioning support column, which includes a support column on the outside and a sliding rod on the inside. The latter can lift and stretch in the former. A two-way control insert sleeve is fixed on the upper part of the support column, and a tooth-shaped block is arranged on an edge of the sliding rod. The support column is fixed by pressing on the tooth-shaped block through a pull-and-lock positioning mechanism. The tooth-shaped block here is also a vulnerable part, and it is not easy to maintain the accuracy during equidistant adjustment.

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

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

[0007] The present invention realizes the above object through the following technical solutions: A standardized durable flexible support positioning column, including a bottom plate, an outer square tube fixed on the bottom plate, an inner square tube that lifts vertically in the outer square tube, a locking mechanism for defining the relative position between the outer square tube and the inner square tube, and multiple pairs of chute pin assemblies located between the outer square tube and the inner square tube;

[0008] On each side of the outer square tube, three columns of outer standard positioning holes are arranged in an array. On each side of the inner square tube, two columns of inner standard positioning holes are arranged in an array. An embedding hole is also provided on the outer square tube, and the embedding hole occupies the area where three outer standard positioning holes arranged left and right are located.

[0009] The chute pin assemblies are used in pairs in the front-back direction or the left-right direction, and two chute pins in each direction are arranged side by side vertically. Each chute pin assembly includes a chute pin and a pair of first ball head spring plungers. Each chute pin passes through one of the left and right two outer standard positioning holes at the same height on the same side of the outer square tube. A chute matching the outer surface of the inner square tube is provided on the chute pin, and a pair of ball head spring plungers are embedded in the bottom surface of the chute and used to contact the outer side of the inner square tube.

[0010] The locking mechanism is a quick clamping mechanism that drives the expansion and contraction of the pressing block by the rotation of the turning handle. A positioning pin is provided on the pressing block. The pressing block expands and contracts in the embedding hole, and the positioning pin completes the positioning of the outer square tube and the inner square tube by inserting into the inner standard positioning hole.

[0011] Specifically, the aperture diameters of the outer standard positioning holes and the inner standard positioning holes 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 distance from the hole edge is D.

[0012] Specifically, two pairs of adjustment holes are distributed on each side of the outer square tube. Each pair of adjustment holes is arranged at the same height on the same side and at the same level, and the center of the adjustment hole is located at the symmetric center of the two adjacent outer standard positioning holes on its left and right. Each chute pin assembly further includes a pair of adjustment screws, and the two adjustment screws pass through the adjustment holes and abut against the opposite surfaces of the bottom surface of the chute.

[0013] Specifically, the locking mechanism further includes a locking seat, a central shaft, a pin shaft, and two rollers. The locking seat is fixed to one side surface of the outer square tube. The front surface of the locking seat is provided with a cylindrical portion, and the middle portion is provided with a guiding groove. The axial direction of the cylindrical portion and the penetrating direction of the guiding groove are both located in the first horizontal direction, and 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 guiding groove and the embedding hole; the central shaft penetrates the cylindrical portion along the first horizontal direction, the inner end of the central shaft is rotationally connected to the pressing block, and the outer end is connected to 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 left and right adjacent inner standard positioning holes; the pin shaft passes through the middle portion of the central shaft in the radial direction, and both ends of the pin shaft are rotationally connected to a roller respectively. Two rotating grooves are symmetrically distributed at the center of the cylindrical portion, and the rollers move within the range of the rotating grooves. The rotating grooves have straight segments and curved segments that are connected end to end; when the rollers reach the end of the straight segment, the two positioning pins are inserted into the two inner standard positioning holes; when the rollers reach the end of the curved segment, the two positioning pins completely withdraw from the two inner standard positioning holes.

[0014] Further, the locking mechanism further includes a protective shell, and the protective shell is fixed outside the cylindrical portion and shields the two rollers.

[0015] Further, the locking mechanism further includes two second ball head spring plungers. The two second ball head spring plungers respectively pass through the opposite sides of the locking seat, and their ball heads abut against the side of the pressing block.

[0016] Further, a pair of semi-circular protrusions are provided on the reverse side of the locking seat. The semi-circular protrusions are located outside the horizontal projection range of the guiding groove and match a partial edge of the embedding hole.

[0017] The beneficial effects of the technical solution of the present invention are as follows:

[0018] In the present invention, the lifting of the inner square tube relative to the outer square tube is guided by a pair of chute pin assemblies. The acting force of the first ball head spring plunger on the surface of the inner square tube is small, and the contact positions are along several limited straight lines. Even if there is slight wear, the inner square tube can still be lifted vertically; the locking mechanism uses the positioning pins to insert into the inner standard positioning holes to complete positioning, with accurate step distance and large bearing capacity in the vertical direction, and it is not easy to cause a reduction in positioning accuracy due to wear, thereby prolonging the service life of the entire flexible support positioning column. Description of the Drawings

[0019] Figure 1 It is a three-dimensional view of the standardized durable flexible support positioning column in the use state;

[0020] Figure 2 It is a three-dimensional view of the outer square tube;

[0021] Figure 3 It is a three-dimensional view of the spatial distribution of all chute pin assemblies;

[0022] Figure 4 It is a connection diagram of the outer square tube, the locking mechanism and the chute pin assembly;

[0023] Figure 5 It is a three-dimensional view of the locking mechanism;

[0024] Figure 6 It is an exploded view of the locking mechanism;

[0025] Figure 7 It is a sectional view of the locking mechanism;

[0026] Figure 8 It is a three-dimensional view of the locking seat.

[0027] The numbers in the figure indicate:

[0028] 1 - Flexible support positioning column,

[0029] 11 - Bottom plate,

[0030] 12 - Outer square tube, 121 - Outer standard positioning hole, 122 - Embedded hole,

[0031] 13 - Inner square tube, 131 - Inner standard positioning hole,

[0032] 14 - Locking mechanism, 141 - Locking seat, 1411 - Cylindrical part, 14111 - Rotating groove, 1412 - Guide groove, 1413 - Semi-circular protrusion, 142 - Central axis, 143 - Rotating handle, 144 - Pin shaft, 145 - Roller, 146 - Pressing block, 147 - Positioning pin, 148 - Protective shell, 149 - Second ball head spring plunger,

[0033] 15 - Chute pin assembly, 151 - Chute pin, 1511 - Chute, 152 - First ball head spring plunger, 153 - Adjusting screw;

[0034] 2 - Measuring mechanism;

[0035] 3 - Quick-change clamp. Specific embodiments

[0036] The present invention will be further described in detail below in conjunction with specific embodiments.

[0037] Embodiment:

[0038] As Figures 1 to 4As shown in the figure, a standardized durable flexible support positioning column 1 of the present invention includes a bottom plate 11, an outer square tube 12 fixed on the bottom plate 11, an inner square tube 13 that moves up and down vertically inside the outer square tube 12, a locking mechanism 14 for defining the relative position between the outer square tube 12 and the inner square tube 13, and multiple pairs of chute pin assemblies 15 located between the outer square tube 12 and the inner square tube 13.

[0039] In this embodiment, the flexible support positioning column 1 is fixed on the working surface by relying on the bottom plate 11. The height of the inner square tube 13 inside the outer square tube 12 is adjusted and intermittently fixed by relying on the locking mechanism 14, and the adjustment interval distance is fixed. The top of the inner square tube 13 protrudes 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 quantitatively according to actual needs.

[0040] As Figure 1 and Figure 2 shown, each side of the outer square tube 12 is arranged with three columns of outer standard positioning holes 121 in an array, each side of the inner square tube 13 is arranged with two columns of inner standard positioning holes 131 in an array. The aperture of the outer standard positioning hole 121 and the aperture of the inner standard positioning hole 131 are both D. The center distance between adjacent outer standard positioning holes 121 and the center distance between adjacent inner standard positioning holes 131 are both 2D. The side length of the outer square tube 12 is 6D, the side length of the inner square tube 13 is 4D, and the hole edge distance is all D. An embedding hole 122 is also provided on the outer square tube 12. The embedding hole 122 occupies the area where three outer standard positioning holes 121 arranged left and right are located. Each side of the outer square tube 12 is distributed with two pairs of adjustment holes 123. Each pair of adjustment holes 123 is arranged at the same height on the same side, and the center of the adjustment hole 123 is located at the symmetric center of the two adjacent outer standard positioning holes 121 on its left and right.

[0041] The layout rule of the outer standard positioning hole 121 and the inner standard positioning hole 131 is the same, but the size of the inner square tube 13 is smaller than the size of the outer square tube 12, so as to realize the lifting and telescoping of the inner square tube 13 inside the outer square tube 12. The 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 same type of standard positioning hole. The hole edge distance 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 arrangement rules of the outer standard positioning hole 121 and the inner standard positioning hole 131 are the same and the center distance is all 2D, fixation can be carried out every 2D length, and the step distance is accurate. All parts of the flexible support positioning column 1 can be made into standard parts, with standardized, flexible and modular structures, so as to flexibly adapt to the size positioning requirements of the measuring mechanism 2.

[0042] As Figure 3 and Figure 4As shown in the figure, each chute pin assembly 15 includes a chute pin 151, a pair of first ball head spring plungers 152, and a pair of adjusting screws 153. Each chute pin 151 passes through one of the left and right outer standard positioning holes 121 on the same side and at the same height of the outer square tube 12. A chute 1511 matching the outer surface of the inner square tube 13 is provided on the chute pin 151. A pair of first ball head spring plungers 152 are embedded in the bottom surface of the chute 1511 and are used to contact the outer side surface of the inner square tube 13. The two adjusting screws 153 pass through the adjusting holes 123 and abut against the opposite surfaces of the bottom surface of the chute. The chute pin assemblies 15 are used in pairs in the front-back direction or the left-right direction, and the two chute pins 151 in each direction are arranged side by side vertically.

[0043] The outer wall of the inner square tube 13 does not directly contact the inner wall of the outer square tube 12. The chutes 1511 of the left and right two chute pins 151 at the same height are opposite to each other, so that all the chutes 1511 can enclose a straight-columnar telescopic space for the inner square tube 13. Since theoretically the axis of the chute pin 151 should be flush with the outer wall of the inner square tube 13, according to the spatial relationship among the inner square tube 13, the outer square tube 12, and the chute pin 151, the depth of the chute 1511 is about D / 2. The contact position between the inner square tube 13 and the chute assembly 15 is at the ball head of the first ball head spring plunger 152, so that the inner square tube 13 is subject to rolling friction during telescoping. The first ball head spring plungers 152 in the same direction are distributed at the four corner points of a rectangle, and the ball heads only contact the surface of the inner square tube 13 during rolling and do not pass through the inner standard positioning holes 131. The acting force of the first ball head spring plunger 152 on the surface of the inner square tube 13 is small, and the contact positions are along a limited number of straight lines. Even if there is slight wear, the inner square tube 13 can still be kept rising and falling vertically. The chute pin 151 is fixed at the adjusting hole 123 through the adjusting screw 153, so that the chute pin 151 will not rotate randomly in the outer standard positioning hole 121.

[0044] As 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.

[0045] The locking mechanism 14 is a quick clamping mechanism that drives the expansion and contraction of the pressing block 146 by the rotation of the turning handle 143. The pressing block 146 expands and contracts within the embedding hole 122. The positioning pin 147 provided on the pressing 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 easily subject to problems such as reduced positioning accuracy due to wear, extending the service life of the entire flexible support positioning column 1. The semi-circular protrusion 1413 realizes the limit of the locking seat 141 through cooperation with the embedding hole 122. The rotation of the central shaft 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 shaft 142. The roller 145 can make the friction force between it and the inner wall of the rotating groove 14111 relatively low, making the operation smooth. Since the rotating groove 14111 allows the roller 145 to move along the first horizontal direction while rotating, the central shaft 142 will also drive the pressing block 146 to move along the first horizontal direction, thereby causing the positioning pin 147 to abut against the inner wall of the inner standard positioning hole 131 or disengage from the inner square tube 13. When the positioning pin 147 abuts against the inner wall of the inner standard positioning hole 131, the inner square tube 13 is locked; when the positioning pin 147 disengages from the inner square tube 13, the expansion and contraction amount of the inner square tube 13 can be adjusted. Two second ball head spring plungers 149 are used to prevent the pressing block 146 from contacting the side wall of the guiding groove 1412, avoiding the sliding friction force from hindering the expansion and contraction of the pressing block 146. The protective shell 148 can be used to prevent foreign objects from entering the rotating groove 14111 and hindering the movement of the roller 145, and can also prevent pinching of the human hand, improving the safety of the operation. In this embodiment, the protective shell 148 is fixed to the outside of the cylindrical portion 1411 by a setscrew passing through its side wall.

[0046] The above are only some embodiments of the present invention. For those of ordinary skill in the art, without departing from the inventive concept of the present invention, several deformations and improvements can still be made, and these 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 first 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. 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 sides; each slide slot 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 slot; 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.

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: The locking mechanism also includes a protective shell, which is fixed outside the cylindrical portion and covers the two rollers.

4. The standardized durable flexible support and positioning column according to claim 1, 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.

5. The standardized durable flexible support and positioning column according to claim 1, 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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