Spiral measuring tool

Abstract

The invention discloses a spiral measuring tool which is characterized in that heat insulation sheets are arranged on the front side and the rear side of a ruler frame, so that the application range of the ruler frame can be enlarged, objects in different shapes can be measured conveniently, meanwhile, the ruler frame can be prevented from being affected by thermal expansion and cold contraction, and the measuring accuracy is improved. The control part of the spiral measuring tool comprises the large rotary knob and the small rotary knob, and the surfaces of the large rotary knob and the small rotary knob are provided with the first anti-skid grains and the second anti-skid grains respectively, so that the comfort and the convenience of holding and rotating of an operator can be improved, and the measuring efficiency is improved; according to the spiral measuring tool, the movable cylinder is arranged on the fixed cylinder, and the movable scales are arranged in a regular annular array, so that the alignment and reading accuracy of the movable cylinder and the fixed cylinder can be improved, an operator can conveniently observe and record a measuring result, and the spiral measuring tool can quickly and accurately brake the micro-measuring screw rod and avoid the change of the measuring result through the arrangement of the brake mechanism.

Description

Technical Field

[0001] The invention relates to the technical field of spiral measurement, in particular to a spiral measurement tool. Background Art

[0002] The spiral measuring tool is a precision instrument used to measure length. It uses the principle of spiral amplification to express the tiny distance moved along the axis as a reading on the circumference.

[0003] Existing spiral measurement tools have some shortcomings, such as: 1. The structure of the ruler frame is relatively simple, which is not conducive to measuring objects of different shapes. During operation, due to the heat transfer problem of contact temperature, it is easy to cause deviation in object measurement; 2. Reading on the circumference is not conducive to alignment and reading with the millimeter scale; 3. In the prior art, the micro-meter screw is braked by bolts. On the one hand, it is not convenient to brake the micro-meter screw quickly and accurately, and the operation is cumbersome. On the other hand, under tight pressure, the precision of the micro-meter screw is easily affected after repeated use.

[0004] In view of this, a spiral measuring tool is now designed. Summary of the invention

[0005] The object of the present invention is to provide a spiral measuring tool to solve the problems existing in the existing spiral measuring tools mentioned in the above background technology.

[0006] To achieve the above object, the present invention provides the following technical solution: a spiral measuring tool, comprising a ruler frame, a fixed cylinder, a micro-measurement screw, a control part, a movable cylinder and a braking mechanism; The ruler frame has crescent grooves on both the front and rear sides, the inner wall of the upper end of one side of the ruler frame is fixedly connected to the anvil, the upper end of the other side of the ruler frame is a cylindrical structure, and the upper end of the side of the ruler frame away from the anvil is fixedly connected to a threaded inner cylinder; The fixed cylinder is fixedly connected to the upper end of the ruler frame away from the anvil, the threaded inner cylinder is arranged on the inner side of the fixed cylinder, and a fixed scale is arranged on the surface of the fixed cylinder; The micro-measurement screw is movably connected to the ruler frame; The control part is fixedly connected to the micro-test screw; The movable cylinder is fixedly connected to the control part, and the micro-screw is passed through the inner side of the movable cylinder; The braking mechanism is arranged on the ruler frame and the micro-probe screw, and the braking mechanism is suitable for braking the micro-probe screw.

[0007] Preferably, the ruler frame and the crescent groove are both "C"-shaped structures, and a heat insulation sheet is fixedly embedded in the crescent groove, and the heat insulation sheet is adapted to the shape of the crescent groove.

[0008] Preferably, the fixed scale is arranged along the length extension direction of the fixed tube, and the fixed scale includes an upper millimeter scale line and a lower half millimeter scale line.

[0009] Preferably, the micro-test screw comprises a clamping portion and a transmission portion, wherein: The clamping part is connected to the transmission part in one piece, and the clamping part is connected to the upper end of the ruler frame away from the anvil with clearance, and the clamping part corresponds to the anvil in a horizontal position; The surface of the transmission part is connected with the inner wall surface of the threaded inner cylinder through a threaded structure.

[0010] Preferably, the control part includes a large knob, a small knob, two sets of first anti-slip patterns and second anti-slip patterns, wherein: One end of the large knob is fixedly connected to the small knob, and the other end of the large knob is fixedly connected to the transmission part; Two sets of first anti-slip grooves are arranged at intervals on the surface of the large knob. The second anti-slip pattern is arranged on the surface of the small knob.

[0011] Preferably, the movable cylinder comprises a precise measuring part, a connecting part and a movable scale, wherein: The precise measuring part is integrally connected with the connecting part, and the precise measuring part is movably sleeved on the outer side of the fixed tube; The movable scales are arranged on the surface of the precise measuring part in a regular annular array.

[0012] Preferably, the precise measuring part is a truncated cone-shaped hollow structure, and the inner diameter length of the precise measuring part, the inner diameter length of the connecting part and the outer diameter length of the fixed tube are all matched.

[0013] Preferably, the braking mechanism comprises an inner groove, a rotating rod, two sets of sliders and a knob, wherein: The inner groove is opened in the upper end of the ruler frame; The rotating rod is rotatably connected to the upper end of the ruler frame and the inner groove; Two sets of sliders are mirror-imaged and movably arranged in the inner groove, and the two sets of sliders are movably sleeved on the rotating rod; The knob and the rotating rod are fixedly connected to the outer side of the ruler frame.

[0014] Preferably, the surface of the rotating rod is provided with a first thread and a second thread, the thread directions of the first thread and the second thread are opposite, and the first thread and the second thread are connected to the inner sides of the two sets of sliders through thread structures respectively.

[0015] Preferably, the upper end of the slider is movably connected to the upper end of the inner groove, and the width of the upper end of the slider is matched with the width of the upper end of the inner groove.

[0016] Compared with the prior art, the present invention has the following beneficial effects: 1. The spiral measuring tool is equipped with heat insulation sheets on both sides of the ruler frame, which can increase the scope of application of the ruler frame and facilitate the measurement of objects of different shapes. At the same time, it can prevent the ruler frame from being affected by thermal expansion and contraction, thereby improving the accuracy of measurement; 2. The control part of the spiral measuring tool includes a large knob and a small knob. The surfaces of the large knob and the small knob are respectively provided with a first anti-slip pattern and a second anti-slip pattern, which can increase the comfort and convenience of the operator's holding and rotation and improve the efficiency of measurement; 3. The spiral measuring tool has a truncated cone-shaped hollow structure in the precise measuring part, and is provided with movable scales in a regular annular array, which can increase the alignment of the movable cylinder and the fixed cylinder and the accuracy of the reading, making it convenient for the operator to observe and record the measurement results; 4. The spiral measuring tool can quickly and accurately brake the micro-measurement screw through the setting of the braking mechanism to avoid changes in the measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural schematic diagram of the maximum measuring length of a spiral measuring tool of the present invention; Figure 2 It is a structural schematic diagram of a spiral measuring tool of the present invention; Figure 3 It is a structural schematic diagram of the minimum measuring length of a spiral measuring tool of the present invention; Figure 4 It is a schematic diagram of the partial structure of a spiral measuring tool of the present invention; Figure 5 A spiral measuring tool of the present invention Figure 1 The enlarged view of point A in the middle; Figure 6 A schematic diagram of the structure of a movable cylinder of a spiral measuring tool of the present invention; Figure 7 It is a schematic diagram of the structure of a micro-measurement screw of a spiral measuring tool of the present invention; Figure 8 The figure is a partial side structural sectional view of a spiral measuring tool of the present invention.

[0018] In the figure: 1. Ruler frame; 11. Crescent groove; 12. Heat insulation sheet; 13. Anvil; 14. Threaded inner cylinder; 2. Fixed cylinder; 21. Fixed scale; 211. Upper millimeter scale line; 212, lower half millimeter scale line; 3. Micro-screw; 31. Clamping part; 32. Transmission part; 4. Control unit; 41. Large knob; 42. Small knob; 43. first anti-slip pattern; 44. second anti-slip pattern; 5. movable cylinder; 51. precise measuring part; 52. connecting part; 53. Activity scale; 6. Braking mechanism; 61. Inner groove; 62. Rotating rod; 621, first thread; 622, second thread; 63, slider; 64. Knob. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0020] In the description of the invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as limiting the invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0021] In the description of the invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0022] See also Figure 1-8 The present invention provides a technical solution: a spiral measuring tool, including a ruler frame 1, a fixed cylinder 2, a micro-measurement screw 3, a control part 4, a movable cylinder 5 and a braking mechanism 6.

[0023] A crescent groove 11 is provided on both the front and rear sides of the ruler frame 1, and an anvil 13 is fixedly connected to the inner wall of the upper end of one side of the ruler frame 1. The upper end of the other side of the ruler frame 1 is a cylindrical structure, and a threaded inner cylinder 14 is fixedly connected to the upper end of the side of the ruler frame 1 away from the anvil 13.

[0024] The ruler frame 1 and the crescent groove 11 are both "C" shaped structures, and a heat insulation sheet 12 is fixedly embedded in the crescent groove 11, and the heat insulation sheet 12 is adapted to the shape of the crescent groove 11. Specifically, the provision of the crescent groove 11 and the heat insulation sheet 12 increases the applicable scope of the ruler frame 1, and the user can avoid directly touching the ruler frame 1 by contacting the heat insulation sheet 12 during operation, thereby preventing the ruler frame 1 from being affected by thermal expansion and contraction, and improving the accuracy of measurement.

[0025] The fixed tube 2 is fixedly connected to the upper end of the ruler frame 1 away from the anvil 13 , the threaded inner tube 14 is arranged on the inner side of the fixed tube 2 , and a fixed scale 21 is arranged on the surface of the fixed tube 2 .

[0026] The fixed scale 21 is arranged along the length extension direction of the fixed cylinder 2, and the fixed scale 21 includes an upper millimeter scale line 211 and a lower half millimeter scale line 212. Specifically, each scale interval of the upper millimeter scale line 211 corresponds to 1mm, and each scale interval of the lower half millimeter scale line 212 corresponds to 0.5mm. The fixed cylinder 2 moves synchronously with the micro-measurement screw 3. By setting the upper millimeter scale line 211 and the lower half millimeter scale line 212, the clarity and accuracy of the fixed scale 21 are increased, and it is convenient for the operator to read the measurement results.

[0027] The micro-measurement screw 3 is movably connected to the ruler frame 1 .

[0028] The micro-screw 3 includes a clamping portion 31 and a transmission portion 32, wherein: The clamping part 31 is integrally connected with the transmission part 32. The clamping part 31 is connected to the upper end of the ruler frame 1 away from the anvil 13 with clearance fit. The clamping part 31 corresponds to the anvil 13 in a horizontal position. The surface of the transmission part 32 is connected to the inner wall surface of the threaded inner cylinder 14 through a threaded structure.

[0029] Specifically, the inner side of the upper end of the ruler frame 1 has a positioning effect on the clamping part 31, which increases the stability and accuracy of the micro-measurement screw 3, and the horizontal position movement of the micro-measurement screw 3 can be achieved by rotating the transmission part 32.

[0030] The control part 4 is fixedly connected to the micro-screw 3 .

[0031] The control part 4 includes a large knob 41, a small knob 42, two sets of first anti-slip grooves 43 and second anti-slip grooves 44, wherein: One end of the large knob 41 is fixedly connected to the small knob 42, and the other end of the large knob 41 is fixedly connected to the transmission part 32; Two groups of first anti-slip grooves 43 are arranged on the surface of the large knob 41 at intervals. The second anti-slip pattern 44 is disposed on the surface of the small knob 42 .

[0032] Specifically, the first anti-slip pattern 43 and the second anti-slip pattern 44 increase the comfort and convenience of the operating part 4, and the diameter length of the large knob 41 is greater than the diameter length of the small knob 42, which improves the measurement efficiency. The setting of the small knob 42 can avoid the problem of the measured object being squeezed and deformed.

[0033] The movable cylinder 5 is fixedly connected to the operating part 4 , and the micro-screw 3 is passed through the inner side of the movable cylinder 5 .

[0034] The movable cylinder 5 comprises a precise measuring part 51, a connecting part 52 and a movable scale 53, wherein: The precise measuring part 51 is integrally connected with the connecting part 52, and the precise measuring part 51 is movably sleeved on the outer side of the fixed tube 2; The movable scales 53 are arranged on the surface of the precise measuring part 51 in a regular annular array.

[0035] Specifically, the movable scale 53 divides a circle into 50 equal parts. After the movable cylinder 5 rotates one circle, the position of the fixed scale 21 at the edge of the precise measuring part 51 is horizontally displaced by one pitch, and one pitch is 0.5 mm.

[0036] The movable scale 53 improves the measurement accuracy, and the precise measuring part 51 increases the alignment of the movable cylinder 5 and the fixed cylinder 2 and the accuracy of the reading, making it convenient for the operator to observe and record the measurement results.

[0037] The precise measuring part 51 is a truncated cone-shaped hollow structure, and the inner diameter length of the precise measuring part 51 and the inner diameter length of the connecting part 52 are all adapted to the outer diameter length of the fixed cylinder 2. Specifically, the fixed cylinder 2 has a positioning function for the movable cylinder 5.

[0038] The braking mechanism 6 is arranged on the ruler frame 1 and the micrometer screw 3 , and the braking mechanism 6 is suitable for braking the micrometer screw 3 .

[0039] The brake mechanism 6 includes an inner groove 61, a rotating rod 62, two sets of sliders 63 and a knob 64, wherein: The inner groove 61 is formed in the upper end of the ruler frame 1; The rotating rod 62 is rotatably connected to the upper end of the ruler frame 1 and the inner groove 61; Two sets of sliders 63 are mirror-imaged and movably arranged in the inner groove 61, and the two sets of sliders 63 are movably sleeved on the rotating rod 62; The knob 64 and the rotating rod 62 are fixedly connected to the outer side of the ruler frame 1 .

[0040] The surface of the rotating rod 62 is provided with a first thread 621 and a second thread 622, the first thread 621 and the second thread 622 have opposite thread directions, and the first thread 621 and the second thread 622 are connected to the inner sides of the two sets of sliders 63 through thread structures. Specifically, the knob 64 is used to facilitate the operator to control the braking mechanism 6 from the outside of the ruler frame 1, and the rotating rod 62 can be driven to rotate by the knob 64, and the movement of the two sets of sliders 63 can be controlled by the two sets of threads in opposite directions on the rotating rod 62, so as to achieve the opposite horizontal movement of the two sets of sliders 63, and the two sets of sliders 63 can realize synchronous clamping of the two sides of the micro-measurement screw 3, on the one hand, the micro-measurement screw 3 can be braked quickly and accurately to avoid changes in the measurement results, and on the other hand, the problem of the pressure caused by the single-sided braking of the micro-measurement screw 3 affecting the accuracy is avoided, and the braking balance and stability are achieved.

[0041] The upper end of the slider 63 is movably connected to the upper end of the inner groove 61, and the width of the upper end of the slider 63 is adapted to the width of the upper end of the inner groove 61. Specifically, the slider 63 is an "L"-shaped structure, and the inner groove 61 has a positioning function for the slider 63.

[0042] Specifically, when in use, the slider 63 is disengaged from the micro-meter screw 3 by operating the braking mechanism 6, and the movable cylinder 5 and the micro-meter screw 3 are controlled to rotate synchronously by the first anti-skid pattern 43 and the large knob 42, so that the clamping part 31 moves away from one side of the anvil 13, so that the distance between the micro-meter screw 3 and the anvil 13 increases and exceeds the size of the object to be measured, and then the object to be measured is placed between the micro-meter screw 3 and the anvil 13, and the distance between the micro-meter screw 3 and the anvil 13 is controlled to be reduced by the first anti-skid pattern 43 and the large knob 42. When the measuring screw 3 and the object to be measured are about to contact, the movement of the micro-meter screw 3 is controlled by the small knob 42 and the second anti-skid pattern 44 until the micro-meter screw 3 and the anvil 13 clamp the two sides of the measured object, then the rotation of the control part 4 is stopped, and the two groups of sliders 63 are controlled by the braking mechanism 6 to clamp the micro-meter screw 3. At this time, measurement can be achieved by combining the fixed scale 21 and the movable scale 53.

[0043] Although the present invention has been described in detail with reference to the aforementioned embodiments, it is still possible for those skilled in the art to modify the technical solutions described in the aforementioned embodiments, or to make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A spiral measuring tool, characterized in that: It comprises a ruler frame (1), a fixed cylinder (2), a micro-measurement screw (3), a control part (4), a movable cylinder (5) and a braking mechanism (6); The ruler frame (1) has a crescent groove (11) formed in both the front and rear sides, the inner wall of the upper end of one side of the ruler frame (1) is fixedly connected to a measuring anvil (13), the upper end of the other side of the ruler frame (1) is a cylindrical structure, and the upper end of the side of the ruler frame (1) away from the measuring anvil (13) is fixedly connected to a threaded inner cylinder (14); The fixed cylinder (2) is fixedly connected to the upper end of the ruler frame (1) away from the measuring anvil (13), the threaded inner cylinder (14) is arranged on the inner side of the fixed cylinder (2), and the surface of the fixed cylinder (2) is provided with a fixed scale (21); The micro-measurement screw (3) is movably connected to the ruler frame (1); The control part (4) is fixedly connected to the micro-test screw (3); The movable cylinder (5) is fixedly connected to the control part (4), and the micro-measurement screw (3) is inserted into the inner side of the movable cylinder (5); The braking mechanism (6) is arranged on the ruler frame (1) and the micro-measurement screw (3), and the braking mechanism (6) is suitable for braking the micro-measurement screw (3).

2. A spiral measuring tool according to claim 1, characterized in that: The ruler frame (1) and the crescent groove (11) are both "C"-shaped structures, and a heat insulation sheet (12) is fixedly embedded in the crescent groove (11), and the shape of the heat insulation sheet (12) is adapted to that of the crescent groove (11).

3. A spiral measuring tool according to claim 1, characterized in that: The fixed scale (21) is arranged along the length extension direction of the fixed cylinder (2), and the fixed scale (21) comprises an upper millimeter scale line (211) and a lower half millimeter scale line (212).

4. A spiral measuring tool according to claim 1, characterized in that: The micro-test screw (3) comprises a clamping portion (31) and a transmission portion (32), wherein: The clamping portion (31) is integrally connected to the transmission portion (32); the clamping portion (31) is loosely fitted and inserted into the upper end of the ruler frame (1) away from the measuring anvil (13); the clamping portion (31) corresponds to the measuring anvil (13) in a horizontal position; The surface of the transmission part (32) is connected to the inner wall surface of the threaded inner cylinder (14) via a threaded structure.

5. A spiral measuring tool according to claim 1, characterized in that: The control part (4) comprises a large knob (41), a small knob (42), two sets of first anti-slip grooves (43) and second anti-slip grooves (44), wherein: One end of the large knob (41) is fixedly connected to the small knob (42), and the other end of the large knob (41) is fixedly connected to the transmission part (32); Two groups of first anti-slip grooves (43) are arranged at intervals on the surface of the large knob (41). The second anti-slip pattern (44) is arranged on the surface of the small knob (42).

6. A spiral measuring tool according to claim 1, characterized in that: The movable cylinder (5) comprises a precise measuring portion (51), a connecting portion (52) and a movable scale (53), wherein: The precise measuring part (51) is integrally connected to the connecting part (52), and the precise measuring part (51) is movably sleeved on the outside of the fixed cylinder (2); The movable scales (53) are arranged in a regular annular array on the surface of the precise measuring part (51).

7. A spiral measuring tool according to claim 6, characterized in that: The precise measuring part (51) is a truncated cone-shaped hollow structure, and the inner diameter length of the precise measuring part (51), the inner diameter length of the connecting part (52), and the outer diameter length of the fixed cylinder (2) are all compatible.

8. A spiral measuring tool according to claim 1, characterized in that: The braking mechanism (6) comprises an inner groove (61), a rotating rod (62), two sets of sliders (63) and a knob (64), wherein: The inner groove (61) is formed in the upper end of the ruler frame (1); The rotating rod (62) is rotatably connected to the upper end of the ruler frame (1) and the inner groove (61); The two sets of sliders (63) are movably arranged in the inner groove (61) in a mirror-like manner, and the two sets of sliders (63) are movably sleeved on the rotating rod (62); The knob (64) and the rotating rod (62) are fixedly connected to the outer side of the ruler frame (1).

9. A spiral measuring tool according to claim 8, characterized in that: The surface of the rotating rod (62) is provided with a first thread (621) and a second thread (622), the thread directions of the first thread (621) and the second thread (622) are opposite, and the first thread (621) and the second thread (622) are respectively connected to the inner sides of the two sets of sliders (63) through thread structures.

10. A spiral measuring tool according to claim 8, characterized in that: The upper end of the slider (63) is movably connected to the upper end of the inner groove (61), and the width of the upper end of the slider (63) is adapted to the width of the upper end of the inner groove (61).

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