Measuring mechanism and transportation device

Abstract

The utility model relates to the technical field of measurement, in particular to a measuring mechanism and a transportation device, which comprise a limiting unit, an adjusting assembly arranged on a pressure pipeline element, a positioning assembly arranged on the inner side of the adjusting assembly, and a connecting assembly arranged on the inner side of the adjusting assembly; the measuring unit comprises a measuring assembly arranged on the outer side of the connecting assembly and a clamping assembly arranged on the inner side of the measuring assembly. The beneficial effects of the utility model are that the inner wall centering can be carried out through the cooperation of the limiting main ruler and the limiting auxiliary ruler, the wall thickness can be measured through the cooperation of the measuring main ruler and the measuring auxiliary ruler, and the inner wall centering can be carried out through the limiting ruler according to the characteristics of the turning of the end part of the pressure pipeline element, and the coaxial circumferential rotation of the measuring ruler can be realized. The wall thickness, the inner diameter and the outer diameter of any position in the circumferential direction can be measured, then turning working conditions such as eccentricity and out-of-roundness are judged, continuous measurement of size information is achieved, and measurement portability and accuracy are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of measurement, in particular to a measuring mechanism and a transport device. Background Art

[0002] The ports of pressure piping components are often turned into the required groove type at the equipment manufacturer. Depending on the wall thickness of the pressure piping component, the groove type can be I-type, V-type or U-type. During factory inspection or on-site acceptance, the outer diameter, wall thickness, groove type, etc. of the ports of pressure piping components need to be checked. When checking the outer diameter, a vernier caliper is usually used to measure twice at an interval of 90° between the end faces. When measuring the wall thickness, a vernier caliper or ultrasonic thickness gauge is usually used to measure four times at an interval of 90°. If there is an eccentric condition during turning, measuring the outer diameter and inner diameter only at the groove position cannot evaluate the eccentric condition. When the pipe wall is thick and the groove area is large, it is not convenient to measure the wall thickness with a vernier caliper. For pressure piping components with high dimensional requirements, the measurement using a vernier caliper is not continuous and the measurement error is large.

[0003] Therefore, there is a need for a pressure piping component dimension measuring device that is tailored to the characteristics of measuring the dimension of the turning port of the pressure piping component, and the device can conveniently adjust the measurement position as needed. Utility Model Content

[0004] The purpose of this section is to summarize some aspects of the embodiments of the utility model and briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section and the specification abstract and utility model name of this application to avoid blurring the purpose of this section, specification abstract and utility model name, and such simplifications or omissions cannot be used to limit the scope of the utility model.

[0005] In view of the problems in the above-mentioned prior art that the wall thickness to be measured is inconvenient to measure and the eccentric working condition cannot be accurately evaluated, the present utility model is proposed.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a limiting unit comprises an adjusting assembly arranged on a pressure pipe element, a positioning assembly arranged inside the adjusting assembly, and a connecting assembly arranged inside the adjusting assembly;

[0007] The measuring unit comprises a measuring component arranged outside the connecting component and a clamping component arranged inside the measuring component.

[0008] As a preferred solution of a measuring mechanism of the utility model, the adjustment component includes four limit main scales arranged on the inner side of the pressure pipeline element, a tightening spring arranged on the inner side of the limit main scale, a fixed rack arranged on the inner side of the limit main scale, a transmission gear meshed with the fixed rack, a movable rack meshed with the transmission gear, a limit ratchet arranged on one side of the transmission gear, a pawl arranged on one side of the limit ratchet, and an unlocking rod arranged on one side of the pawl.

[0009] As a preferred solution of a measuring mechanism of the utility model, the positioning assembly includes a limit secondary ruler arranged at one end of the tensioning spring, an arc-shaped contact arranged at the top of the limit secondary ruler, and a limit slot arranged at the center of the limit main ruler.

[0010] As a preferred solution of a measuring mechanism of the utility model, the connecting assembly includes an inner diameter axis centering rod arranged on the inner side of the limiting main scale, a group of limiting protrusions arranged on the outer side of the inner diameter axis centering rod, a spherical sliding ring arranged on the outer side of the inner diameter axis centering rod, and a rotating wheel arranged on the outer side of the spherical sliding ring.

[0011] As a preferred solution of a measuring mechanism of the utility model, the measuring assembly includes a main measuring scale arranged on the outside of the connecting assembly, a positioning bolt arranged on the inside of the main measuring scale, and a secondary measuring scale arranged on the inside of the main measuring scale.

[0012] As a preferred solution of a measuring mechanism of the utility model, the clamping assembly includes an outer diameter claw arranged at one end of the measuring secondary scale, a sliding groove arranged on the inner side of the measuring secondary scale, a tensioning spring arranged on the inner side of the sliding groove, an inner diameter claw arranged on the inner side of the sliding groove, and a conical contact arranged on the inner side of the inner diameter claw and the outer diameter claw.

[0013] The measuring mechanism of the utility model has the following beneficial effects: the inner wall can be centered by the cooperation of the limit main ruler and the limit sub-rule, the wall thickness can be measured by the cooperation of the measuring main ruler and the measuring sub-rule, and according to the characteristics of the turning processing at the end of the pressure pipeline component, the inner wall is centered by the limit ruler, and the circumferential rotation of the measuring ruler coaxially can be achieved to realize the measurement of the wall thickness, inner diameter and outer diameter at any position in the circumferential direction, and then the turning conditions such as eccentricity and out of roundness can be judged, the continuous measurement of the dimensional information can be realized, and the portability and accuracy of the measurement can be improved.

[0014] In actual use, there are still problems with displacement during measurement and image measurement results.

[0015] To solve the above technical problems, the utility model also provides the following technical solutions: a transport device includes a moving unit, including a pushing component arranged on the outside of a connecting component, a supporting component arranged on the outside of the pushing component, and a moving component arranged at the bottom of the supporting component.

[0016] As a preferred solution of the transportation device of the utility model, the pushing component includes a fixing ring arranged on the outside of the connecting component, and a pushing handle arranged on the outside of the fixing ring.

[0017] As a preferred solution of the transportation device of the utility model, the support assembly includes a triangular bracket arranged on the outside of the fixed ring, and a fixed handle arranged on the outside of the triangular bracket.

[0018] As a preferred solution of the transportation device of the utility model, the moving assembly includes a moving wheel arranged at the bottom of the triangular bracket, and a brake pad arranged at the outside of the moving wheel.

[0019] The beneficial effects of the transportation device of the utility model are as follows: the whole mechanism can be driven to move by cooperating with the pushing component and the supporting component, and the position of the mechanism can be adjusted and braked by the moving component, so that the position of the measuring mechanism can be conveniently adjusted during measurement, thereby avoiding inaccurate measurements caused by difficult adjustment of the measuring position, and braking at any time can also prevent the measuring mechanism from being displaced during the measurement process, which may cause errors in the measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following briefly introduces the drawings required for the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative labor. Among them:

[0021] Figure 1 The figure is a schematic diagram of the overall structure of a measuring mechanism.

[0022] Figure 2 This is a schematic diagram of the overall structure of a measuring mechanism from another angle.

[0023] Figure 3 It is a partial structure of a limit unit of a measuring mechanism and a partially enlarged schematic diagram.

[0024] Figure 4 The present invention is a schematic diagram of a partially unassembled structure of a measuring mechanism.

[0025] Figure 5 The figure is a schematic diagram of the overall structure of a transport device.

[0026] Figure 6 This is a schematic diagram of the specific structure of a transportation device from another angle. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present invention more obvious and easy to understand, the specific implementation methods of the present invention are described in detail below in conjunction with the accompanying drawings.

[0028] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein, and those skilled in the art may make similar generalizations without violating the connotation of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed below.

[0029] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure or characteristic that may be included in at least one implementation of the present invention. The term "in one embodiment" that appears in different places in this specification does not necessarily refer to the same embodiment, nor does it refer to a separate or selective embodiment that is mutually exclusive with other embodiments.

[0030] Example 1

[0031] Reference Figure 1 to Figure 4 , which is the first embodiment of the utility model, provides a measuring mechanism, which can detect whether the pressure pipeline component is eccentric and out of round, and can also measure the wall thickness of the pressure pipeline component.

[0032] Specifically, the limiting unit 100 includes an adjusting component 101 disposed on the pressure pipe element, a positioning component 102 disposed inside the adjusting component 101, and a connecting component 103 disposed inside the adjusting component 101;

[0033] The measuring unit 200 includes a measuring component 201 disposed outside the connecting component 103 , and a clamping component 202 disposed inside the measuring component 201 .

[0034] It should be noted that the adjusting component 101 is sleeved with the positioning component 102 , the positioning component 102 is fixedly connected with the connecting component 103 , the connecting component 103 is hinged with the measuring component 201 , and the clamping component 202 is sleeved with the measuring component 201 .

[0035] When in use, the staff puts the limit unit 100 into the inner side of the pressure pipe component to be measured, adjusts the adjustment component 101 to the required length, and drives the positioning component 102 to the inner wall of the pressure pipe component to be measured through the adjustment component 101, so that the positioning component 102 can reach its inner wall. Further, the measuring component 201 adjusts the length so that the clamping component 202 can clamp the inner and outer walls of the pressure pipe component to be measured, so that the wall thickness can be measured.

[0036] In summary, a beneficial effect of a measuring mechanism is that the inner wall can be centered by the cooperation of the limit main scale 101a and the limit sub-scale 102a, and the wall thickness can be measured by the cooperation of the measuring main scale 201a and the measuring sub-scale 201c. In view of the characteristics of the turning processing at the end of the pressure pipe component, the inner wall is centered by the limit scale, and the coaxial circular rotation of the measuring scale can be used to realize the measurement of the wall thickness, inner diameter and outer diameter at any position in the circumferential direction, and then the turning conditions such as eccentricity and out of roundness can be judged, the continuous measurement of dimensional information can be realized, and the portability and accuracy of the measurement can be improved.

[0037] Example 2

[0038] Reference Figure 1 to Figure 4 , which is the second embodiment of the utility model, provides a measuring mechanism, which can detect whether the pressure pipeline component is eccentric and out of round, and can also measure the wall thickness of the pressure pipeline component.

[0039] Specifically, the limiting unit 100 includes an adjusting component 101 disposed on the pressure pipe element, a positioning component 102 disposed inside the adjusting component 101, and a connecting component 103 disposed inside the adjusting component 101;

[0040] The measuring unit 200 includes a measuring component 201 disposed outside the connecting component 103 , and a clamping component 202 disposed inside the measuring component 201 .

[0041] It should be noted that the adjusting component 101 is sleeved with the positioning component 102 , the positioning component 102 is fixedly connected with the connecting component 103 , the connecting component 103 is hinged with the measuring component 201 , and the clamping component 202 is sleeved with the measuring component 201 .

[0042] Furthermore, the adjustment assembly 101 includes four limit main scales 101a arranged on the inner side of the pressure pipe element, a tightening spring 101b arranged on the inner side of the limit main scale 101a, a fixed rack 101c arranged on the inner side of the limit main scale 101a, a transmission gear 101d meshed with the fixed rack 101c, a moving rack 101e meshed with the transmission gear 101d, a limit ratchet 101f arranged on one side of the transmission gear 101d, a pawl 101g arranged on one side of the limit ratchet 101f, and a movable rack 101e arranged on one side of the pawl 101g. The unlocking rod 101h is characterized in that the inner side of the limit main scale 101a is fixedly connected to the tightening spring 101b, the fixed rack 101c is fixedly connected to the inner side of the limit main scale 101a, the limit ratchet 101f is fixedly connected to the transmission gear 101d, the pawl 101g is in contact with the limit ratchet 101f, and the pawl 101g is hinged to the limit main scale 101a, the unlocking rod 101h is fixedly connected to the pawl 101g, and the unlocking rod 101h passes through the limit main scale 101a, and the unlocking rod 101h is connected with a hexagonal head and is detachable to prevent accidental touch.

[0043] Furthermore, the positioning assembly 102 includes a limiting secondary scale 102a arranged at one end of the tensioning spring 101b, an arc-shaped contact 102b arranged at the top of the limiting secondary scale 102a, and a limiting slot 102c arranged at the center of the limiting main scale 101a, wherein the limiting secondary scale 102a is fixedly connected to the arc-shaped contact 102b.

[0044] It should be noted that the limiting main ruler 101a is sleeved with the limiting auxiliary ruler 102a, one end of the tightening spring 101b is fixedly connected to the inner bottom of the limiting main ruler 101a, and the other end is fixedly connected to the bottom of the limiting auxiliary ruler 102a.

[0045] Furthermore, the connecting assembly 103 includes an inner diameter axis centering rod 103a arranged on the inner side of the limiting main scale 101a, a group of limiting protrusions 103b arranged on the outer side of the inner diameter axis centering rod 103a, a spherical sliding ring 103c arranged on the outer side of the inner diameter axis centering rod 103a, and a rotating wheel 103d arranged on the outer side of the spherical sliding ring 103c, wherein the inner diameter axis centering rod 103a is fixedly connected to the limiting protrusion 103b, the spherical sliding ring 103c is hinged to the inner diameter axis centering rod 103a, and the rotating wheel 103d is hinged to the spherical sliding ring 103c.

[0046] Furthermore, the measuring assembly 201 includes a main measuring scale 201a arranged on the outside of the connecting assembly 103, a positioning bolt 201b arranged on the inside of the main measuring scale 201a, and a secondary measuring scale 201c arranged on the inside of the main measuring scale 201a, wherein the main measuring scale 201a is threadedly connected to the positioning bolt 201b, and the secondary measuring scale 201c is sleeved with the main measuring scale 201a.

[0047] Furthermore, the clamping assembly 202 includes an outer diameter claw 202a arranged at one end of the measuring sub-scale 201c, a sliding groove 202b arranged on the inner side of the measuring sub-scale 201c, a tensioning spring 202c arranged on the inner side of the sliding groove 202b, an inner diameter claw 202d arranged on the inner side of the sliding groove 202b, and a conical contact 202e arranged on the inner sides of the inner diameter claw 202d and the outer diameter claw 202a, wherein the outer diameter claw 202a is fixedly connected to the measuring sub-scale 201c, one end of the tensioning spring 202c is fixedly connected to the outer diameter claw 202a and the other end is fixedly connected to the inner diameter claw 202d, the inner diameter claw 202d is slidably connected to the sliding groove 202b, the conical contact 202e is respectively fixedly connected to the inner diameter claw 202d and the outer diameter claw 202a, and a scale is provided on the outer side of the outer diameter claw 202a.

[0048] It should be noted that the tension spring 202c is in a normal state when the outer diameter claw 202a and the inner diameter claw 202d are closed. When the inner diameter claw 202d is pulled downward, the tension spring 202c enters a stretched state.

[0049] When in use, the four limiting auxiliary rulers are compressed to completely retract the limiting auxiliary ruler 102a back to the inside of the limiting main ruler 101a, and the limiting main ruler 101a and the limiting auxiliary ruler 102a are further pushed into the pressure pipeline component to be measured, and the unlocking rod 101h is further rotated to drive the pawl 101g to rotate outward, so that the pawl 101g leaves the limiting ratchet 101f, and the limiting of the limiting ratchet 101f is released. At this time, the tightening spring 101b is compressed to the bottom, When the ratchet is unlocked, the tensioning spring 101b pushes the limiting sub-rule 102a to move outward, and at the same time, the limiting sub-rule 102a pulls the moving rack 101e to move synchronously. The moving rack 101e drives the transmission gear 101d to rotate through meshing, and the transmission gear 101d moves along the fixed rack 101c through meshing, so that the moving stroke of the limiting sub-rule 102a is large enough. When the arc contact 102b contacts the inner wall of the pressure pipeline component, the movement stops. Further, the lengths of the four limiting sub-rules 102a are adjusted to be equal, ensuring that the limiting slot 102c is at the center of the pressure pipe element, and the unlocking rod 101h is further rotated in the opposite direction, so that the pawl 101g limits the ratchet again, and the transmission gear 101d is limited at the same time, preventing the moving rack 101e and the limiting sub-rule 102a from moving outward again. Further, the staff inserts the inner diameter axis centering rod 103a into the limiting slot 102c, so that the limiting protrusion 103b provided on the inner diameter axis centering rod 103a is engaged with the limiting slot 102c. At this time, the inner diameter axis centering rod 103a cannot form a relative rotational motion with the limiting main ruler 101a, that is, when the limiting main ruler 101a is stationary, the inner diameter axis centering rod 103a is also stationary, and the measuring sub-rule 201c is further pulled to adjust its length, so that the outer diameter claw 202a moves to the pressure pipe element. On the outside of the outer wall of the component, the conical contact 202e at the end of the outer diameter claw 202a is pressed against the outer wall of the pressure piping component to be measured, and is tightened by the positioning bolt 201b to fix the measuring secondary scale 201c and the measuring main scale 201a, and the inner diameter claw 202d is further pulled to make the inner diameter claw 202d move downward along the sliding groove 202b, and the conical contact 202e at the end of the inner diameter claw 202d is pressed against the inner wall of the pressure piping component to be measured, and the tension spring 202c is always in a stretched state, and the inner diameter claw 202d and the outer diameter claw 202a are tension-limited, so that the conical contact 202e provided by the inner diameter claw 202d and the outer diameter claw 202a can stably clamp the wall thickness of the pressure piping component to be measured, and the inner diameter and outer diameter can be directly read through the scale on the side of the outer diameter claw 202a, and the wall thickness is calculated based on the difference between the inner diameter and the outer diameter.Furthermore, the measuring main ruler 201a is rotated one circle along the inner diameter axis of the centering rod 103a through the rotating wheel 103d and the spherical sliding ring 103c to measure the wall thickness dimensions of the pressure pipe component at different positions. During the measurement process, if there is turning eccentricity, the wall thickness of the eccentric side is smaller than that of the non-eccentric side, and the conical contact 202e of the outer diameter claw 202a on the eccentric side will be separated from the outer wall surface; if there is turning out-of-roundness, the inner diameter claw 202d will be separated from the inner wall surface at the place where the diameter increases, and the inner diameter claw 202d will be restricted in rotation at the place where the diameter decreases. This can determine whether the pressure pipe component has turning eccentricity or turning out-of-roundness.

[0050] In summary, a beneficial effect of a measuring mechanism is that the inner wall can be centered by the cooperation of the limit main scale 101a and the limit sub-scale 102a, and the wall thickness can be measured by the cooperation of the measuring main scale 201a and the measuring sub-scale 201c. In view of the characteristics of the turning processing at the end of the pressure pipe component, the inner wall is centered by the limit scale, and the coaxial circular rotation of the measuring scale can be used to realize the measurement of the wall thickness, inner diameter and outer diameter at any position in the circumferential direction, and then the turning conditions such as eccentricity and out of roundness can be judged, the continuous measurement of dimensional information can be realized, and the portability and accuracy of the measurement can be improved.

[0051] Example 3

[0052] Reference Figure 5-6 , which is the third embodiment of the utility model, and this embodiment further provides a transportation device, which can conveniently transport the measuring mechanism to the location of the pressure pipeline component to be measured, and can be fixed during measurement.

[0053] Specifically, a transport device includes the measuring mechanism as in the first or second embodiment and:

[0054] The moving unit 300 includes a pushing component 301 disposed outside the connecting component 103 , a supporting component 302 disposed outside the pushing component 301 , and a moving component 303 disposed at the bottom of the supporting component 302 .

[0055] Furthermore, the pushing assembly 301 includes a fixing ring 301 a disposed on the outside of the connecting assembly 103 , and a pushing handle 301 b disposed on the outside of the fixing ring 301 a .

[0056] Furthermore, the support assembly 302 includes a triangular bracket 302a disposed outside the fixing ring 301a, and a fixed handle 302b disposed outside the triangular bracket 302a.

[0057] Furthermore, the moving assembly 303 includes a moving wheel 303a disposed at the bottom of the triangular bracket 302a, and a brake pad 303b disposed at the outer side of the moving wheel 303a.

[0058] It should be noted that the fixed ring 301a is hinged to the inner diameter axis centering rod 103a, the telescopic handle is sleeved with the fixed ring 301a, the telescopic handle is on the inner side, the triangular bracket 302a is fixedly connected to the fixed ring 301a, the triangular bracket 302a is fixedly connected to the fixed handle 302b, the wheel frame of the moving wheel 303a is fixedly connected to the triangular bracket 302a, the brake pad 303b is hinged to the triangular bracket 302a, and the brake pad 303b is an eccentric wheel structure. When the brake pad 303b is pressed down, the wider part presses against the moving wheel 303a to brake the moving wheel 303a.

[0059] During use, when it is necessary to measure the pressure pipeline component, the staff pushes the pushing handle 301b, and pushes the triangular bracket 302a through cooperation with the fixed handle 302b, so that it drives the entire measuring mechanism to move. When the staff pushes the transport device to the measuring position, the brake pad 303b is pressed to brake the triangular bracket 302a, and the pressing block is further pressed to release the limit of the telescopic handle, and the telescopic handle is retracted into the fixed ring 301a to start measuring the pressure pipeline component.

[0060] In summary, a beneficial effect of a transport device is that the pushing component 301 and the supporting component 302 can cooperate to drive the entire mechanism to move, and the position of the mechanism can be adjusted and braked by the moving component 303, so that the position of the measuring mechanism can be conveniently adjusted during measurement to avoid inaccurate measurements caused by difficult adjustment of the measuring position. Braking at any time can also prevent the measuring mechanism from being displaced during the measurement process, which may cause errors in the measurement results.

[0061] Importantly, it should be noted that the construction and arrangement of the present application shown in a number of different exemplary embodiments are only exemplary. Although only a few embodiments are described in detail in this disclosure, it should be readily understood by those who refer to this disclosure that many modifications are possible without substantially departing from the novel teachings and advantages of the subject matter described in the application (measurement mechanism, mounting arrangement, use of materials, color, directional changes, etc.). For example, the element shown as integrally formed can be composed of multiple parts or elements, the position of the element can be inverted or otherwise changed, and the nature or number or position of the discrete element can be changed or changed. Therefore, all such modifications are intended to be included in the scope of the present utility model. The order or sequence of any process or method steps can be changed or reordered according to alternative embodiments. In the claims, any "device plus function" clause is intended to cover the structure of the execution function described herein, and is not only structurally equivalent but also equivalent structure. Without departing from the scope of the present utility model, other replacements, modifications, changes and omissions can be made in the design, operating conditions and arrangement of the exemplary embodiments. Therefore, the invention is not limited to a specific embodiment, but extends to several modifications still falling within the scope of the appended claims.

[0062] Furthermore, in order to provide a concise description of exemplary embodiments, all characteristic measurement mechanisms of an actual embodiment may not be described.

[0063] It should be understood that in the development of any actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort may be complex and time-consuming, but for those of ordinary skill having the benefit of this disclosure, the development effort will be a routine task of design, fabrication, and production without undue experimentation.

[0064] It should be noted that the above embodiments are only used to illustrate the technical solution of the utility model rather than to limit it. Although the utility model has been described in detail with reference to the preferred embodiments, ordinary technicians in the field should understand that the technical solution of the utility model can be modified or replaced by equivalents without departing from the spirit and scope of the technical solution of the utility model, which should be included in the scope of the claims of the utility model.

Claims

1. A measuring mechanism, characterized in that: include, A limiting unit (100) comprises an adjusting component (101) arranged on a pressure pipe element, a positioning component (102) arranged inside the adjusting component (101), and a connecting component (103) arranged inside the adjusting component (101); The measuring unit (200) comprises a measuring component (201) arranged outside the connecting component (103), and a clamping component (202) arranged inside the measuring component (201).

2. The measuring mechanism according to claim 1, characterized in that: The adjustment assembly (101) comprises four limit main scales (101a) arranged on the inner side of the pressure pipe element, a tightening spring (101b) arranged on the inner side of the limit main scale (101a), a fixed rack (101c) arranged on the inner side of the limit main scale (101a), a transmission gear (101d) meshed with the fixed rack (101c), a moving rack (101e) meshed with the transmission gear (101d), a limit ratchet (101f) arranged on one side of the transmission gear (101d), a pawl (101g) arranged on one side of the limit ratchet (101f), and an unlocking rod (101h) arranged on one side of the pawl (101g).

3. The measuring mechanism according to claim 2, characterized in that: The positioning assembly (102) comprises a limiting secondary ruler (102a) arranged at one end of the tensioning spring (101b), an arc-shaped contact (102b) arranged at the top end of the limiting secondary ruler (102a), and a limiting slot (102c) arranged at the center of the limiting main ruler (101a).

4. The measuring mechanism according to claim 3, characterized in that: The connecting assembly (103) comprises an inner diameter axis centering rod (103a) arranged on the inner side of the limiting main ruler (101a), a group of limiting protrusions (103b) arranged on the outer side of the inner diameter axis centering rod (103a), a spherical sliding ring (103c) arranged on the outer side of the inner diameter axis centering rod (103a), and a rotating wheel (103d) arranged on the outer side of the spherical sliding ring (103c).

5. The measuring mechanism according to any one of claims 1 to 4, characterized in that: The measuring assembly (201) comprises a main measuring scale (201a) arranged on the outside of the connecting assembly (103), a positioning bolt (201b) arranged on the inside of the main measuring scale (201a), and a secondary measuring scale (201c) arranged on the inside of the main measuring scale (201a).

6. The measuring mechanism according to claim 5, characterized in that: The clamping assembly (202) comprises an outer diameter clamping claw (202a) arranged at one end of the measuring secondary scale (201c), a sliding groove (202b) arranged on the inner side of the measuring secondary scale (201c), a tensioning spring (202c) arranged on the inner side of the sliding groove (202b), an inner diameter clamping claw (202d) arranged on the inner side of the sliding groove (202b), and a conical contact (202e) arranged on the inner sides of the inner diameter clamping claw (202d) and the outer diameter clamping claw (202a).

7. A transport device, characterized in that: A measuring mechanism comprising any one of claims 1 to 6; and The moving unit (300) comprises a pushing component (301) arranged outside the connecting component (103), a supporting component (302) arranged outside the pushing component (301), and a moving component (303) arranged at the bottom of the supporting component (302).

8. The transport device according to claim 7, characterized in that: The pushing component (301) comprises a fixing ring (301a) arranged on the outside of the connecting component (103), and a pushing handle (301b) arranged on the outside of the fixing ring (301a).

9. The transport device according to claim 8, characterized in that: The support assembly (302) comprises a triangular bracket (302a) arranged outside the fixing ring (301a), and a fixed handle (302b) arranged outside the triangular bracket (302a).

10. The transport device according to claim 9, characterized in that: The moving assembly (303) comprises a moving wheel (303a) arranged at the bottom of the triangular bracket (302a), and a brake pad (303b) arranged at the outside of the moving wheel (303a).

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