A flexible centering distance measuring device

Abstract

The present invention proposes a flexible centering and distance measuring device, including a clamping claw and a standard measuring ruler. Through the slider bearing between the connecting slider of the clamping claw and the chassis, the clamping claw can be rotated at various angles, reducing the interference of the device during actual use, and having good flexibility. The outer diameter clamping and centering structure can ensure that the device meets the centering clamping of shafts with or without holes within the structure size. The specifications of the standard measuring ruler can be changed, and multi-position and multi-angle measurement can be achieved after adjusting the connecting slider. This device adopts a lightweight design, the overall device is simple, light, small in structure, and simple to operate, which is conducive to mass production and use. It can effectively solve the actual production and change requirements that occur in various stages, and can be adapted for full-scene operations. It can be clamped and fixed when the working conditions are good, and then enter the installation operation in low-visibility or even no-visibility conditions such as underwater and underground.

Description

Technical Field

[0001] The invention belongs to the technical field of measurement, positioning and assembly, and in particular relates to a flexible centering and distance measuring device. Background Art

[0002] In the process of mechanical assembly and manufacturing, there is a need to measure the center distance between two cylinders. For drawing annotations, the main annotation dimensions are mostly the distance between the centers of circles. For the two assembled cylinders, the existing measurement scheme is to determine the maximum outer diameter distance of the two cylinders, and then calculate it by subtracting the diameter. For the case of partially missing inner diameter dimensions, a more complex method is used for calculation. However, in the actual assembly and welding processes, there is also a process of determining the positions of the two cylinders by marking and then installing them, such as welding of accessories inside the vehicle body. Usually, the number of accessories on a scientific research vehicle can reach more than 100. Generally speaking, for mass-produced models, a template with a marked position can be used for positioning. In the scientific research stage, a ruler is mainly used to measure the spacing, and lines are drawn to mark the outer diameter before welding.

[0003] When using a ruler or vernier caliper to measure the center between two shafts, pre-assembly or spot welding is performed according to the center distance. After completion, the outer diameter is measured to confirm the installation error, or special calipers such as templates are designed in advance for assembly and welding positioning. For existing non-standard measuring devices, the center distance caliper is mainly an inner diameter center distance measurement caliper, which cannot be used to install shaft parts without holes. There is still an error between the shaft center and the shaft outer diameter determined by a ruler or vernier caliper, and the center cannot be aligned during installation. When manufacturing special templates, the manufacturing cost will increase, affecting the scientific research cycle. In most cases, it is only suitable for mass production processes and does not have the conditions and capabilities for temporary changes. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] The present invention provides a flexible centering and distance measuring device to solve the technical problems of poor flexibility in centering of existing sample plates and difficulty in measuring with measuring tools such as standard calipers.

[0006] (II) Technical solution

[0007] In order to solve the above technical problems, the present invention proposes a flexible centering distance measuring device, which includes two clamping claws and a measuring ruler, and the clamping claws can be displaced along the axial direction of the measuring ruler; wherein,

[0008] The clamping claw is composed of a left end cover, a lead screw, a left positioning plate, a right positioning plate, a right end cover, a support column, a chassis, a knob, a lead screw bearing, a connecting slider, a slider bearing and a fixing bolt;

[0009] The screw consists of a screw shaft, a right-hand screw thread, a left-hand screw thread and a fixed block; the screw shaft is the main body of the screw, and the right-hand screw thread and the left-hand screw thread have symmetrical right-hand and left-hand threads of equal length, which are distributed at both ends of the screw shaft mark center, and the outer length of the thread at both ends of the screw shaft is the same as the thickness of the left end cover and the right end cover; the outer side of one end of the right-hand screw thread of the screw shaft is connected to a fixed block;

[0010] The left positioning plate and the right positioning plate have a symmetrical structure, and both are positioning plate bodies processed with support positioning holes, screw thread holes and extended clamping claws; wherein the screw thread holes and the two support positioning holes are arranged symmetrically in a triangular shape; the support positioning holes are used to penetrate the support column, the screw thread holes of the left positioning plate are adapted to the left-hand screw thread of the screw, and the screw thread holes of the right positioning plate are adapted to the right-hand screw thread of the screw; the extended clamping claws are used to clamp the workpiece; the right positioning plate is installed on the right spiral screw thread of the screw, and the left positioning plate is installed on the left spiral screw thread of the screw The screw threads are in a closed state when they are respectively rotated to the center position of the screw; the two screw bearings are respectively installed in the bearing installation grooves of the left end cover and the right end cover; one end of the screw with the fixed block extends from the bearing installation groove of the right end cover and is assembled and fastened with the screw bearing so that the screw can rotate axially; the support column passes through the support positioning holes of the left positioning plate and the right positioning plate and is installed on the left end cover and the right end cover, and the knob is installed on the fixed block of the screw; the other end of the screw is connected to the screw bearing of the left end cover to realize the alignment and combination of the screw and the support column;

[0011] The chassis is installed between the left end cover and the right end cover, and the central mounting hole of the chassis is coaxial with the central hole of the lead screw; the slider bearing is installed inside the central mounting hole of the chassis, and the mounting shaft connecting the slider passes through the chassis and is installed on the chassis through fixing bolts.

[0012] Furthermore, a transition arc is arranged inside the extended clamping claw.

[0013] Furthermore, the knob is coated with locking glue and then installed on the fixed block of the lead screw.

[0014] Furthermore, the chassis, the left end cover and the right end cover are welded into one body.

[0015] (III) Beneficial effects

[0016] The present invention proposes a flexible centering distance measuring device, including a clamping claw and a standard measuring ruler. Through the slider bearing between the connecting slider of the clamping claw and the chassis, the clamping claw can be rotated at various angles, the interference of the device in the actual use process is reduced, and it has good flexibility. The outer diameter clamping centering structure is adopted to ensure that the device meets the centering clamping of the shaft with or without holes within the structure size; the standard measuring ruler specifications can be changed, and multi-position and multi-angle measurement can be achieved after adjusting the connecting slider. The device adopts a lightweight design, the overall device is simple, light in weight, small in structure, and simple to operate, which is conducive to mass production and use. It can effectively solve the actual production and change requirements that occur in various stages, and can be adapted to be applied to all-scenario operations. It can be clamped and fixed when the working conditions are good, and then enter the installation operation in low sight distance or even no vision conditions such as underwater and underground. Except for the welding fixation between the chassis and the end cover, the rest of the positions of the device are installed in combination, which can be optimized and adjusted later, and it is possible to disassemble and repair. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 A top view of a flexible centering and ranging device according to an embodiment of the present invention;

[0018] Figure 2 It is a front view of the flexible centering and ranging device according to an embodiment of the present invention;

[0019] Figure 3 This is a front view of the clamping claw structure in an embodiment of the present invention;

[0020] Figure 4 A cross-sectional view of a clamping claw in an embodiment of the present invention;

[0021] Figure 5 This is a schematic diagram of the clamping claw in the closed state in an embodiment of the present invention;

[0022] Figure 6 This is a schematic diagram of the clamping claws in the open state in an embodiment of the present invention;

[0023] Figure 7 This is a schematic diagram of the lead screw structure in an embodiment of the present invention;

[0024] Figure 8 This is a schematic diagram of the positioning plate structure in an embodiment of the present invention;

[0025] Fig. 9 This is a usage state diagram of the flexible centering and ranging device according to an embodiment of the present invention.

[0026] In the figure, 1-clamping claw; 2-standard measuring ruler; 101-left end cover; 102-screw; 103-left positioning plate; 104-right positioning plate; 105-right end cover; 106-support column; 107-chassis; 108-knob; 109-screw bearing; 110-connecting slider; 111-slider bearing; 112-fixing bolt; 301-positioning plate body; 302-support positioning hole; 303-screw threaded hole; 304-extending clamping claw; 401-screw shaft; 402-right-handed screw thread; 403-left-handed screw thread; 404-fixing block. DETAILED DESCRIPTION

[0027] In order to make the purpose, content and advantages of the present invention more clear, the specific implementation methods of the present invention are further described in detail below in conjunction with the drawings and examples.

[0028] This embodiment provides a flexible centering distance measuring device, whose structure is as follows: Figure 1 and 2 As shown, it is mainly composed of two clamping claws 1 and a standard measuring ruler 2. Among them, the standard measuring ruler 2 is used to provide a range scale for marking the size, and other structures that can effectively match and slide with the clamping claws 1 can also be used.

[0029] The structure of the clamping claw 1 is as follows Figures 3 to 6 As shown, it is composed of a left end cover 101, a lead screw 102, a left positioning plate 103, a right positioning plate 104, a right end cover 105, a support column 106, a chassis 107, a knob 108, a lead screw bearing 109, a connecting slider 110, a slider bearing 111 and a fixing bolt 112. The material of each component can be selected from alloy structural steel or high-quality carbon steel.

[0030] The structure of the lead screw 102 is as follows: Figure 7 As shown, it is mainly composed of a screw shaft 401, a right-hand screw thread 402, a left-hand screw thread 403 and a fixed block 404. Among them, the screw shaft 401 is the main body of the screw 102, and the right-hand screw thread 402 and the left-hand screw thread 403 have symmetrical right-hand and left-hand threads of equal length, which are distributed at both ends of the marked center of the screw shaft 401. The outer length of the threads at both ends of the screw shaft 401 is the same as the thickness of the left end cover 101 and the right end cover 105. A fixed block 404 is connected to the outside of one end of the right-hand screw thread 402 of the screw shaft 401.

[0031] The left positioning plate 103 and the right positioning plate 104 have a symmetrical structure. Figure 8As shown, the positioning plate body 301 is mainly processed with a support positioning hole 302, a screw thread hole 303 and an extended clamping claw 304. Among them, the screw thread hole 303 and the two support positioning holes 302 are arranged symmetrically in a triangular shape. The two support positioning holes 302 are used to penetrate the support column 106. The screw thread hole 303 of the left positioning plate 103 is adapted to the left-handed screw thread 403 of the screw 102, and the screw thread hole 303 of the right positioning plate 104 is adapted to the right-handed screw thread 402 of the screw 102. The extended clamping claw 304 can be extended by 5 to 50 mm according to the actual structural requirements, and a certain transition arc can be added inside to ensure the clamping effect.

[0032] The right positioning plate 104 is mounted on the right spiral lead screw thread 402 of the lead screw 102, and the left positioning plate 103 is mounted on the left spiral lead screw thread 403 of the lead screw 102. They are respectively rotated to the center position of the lead screw 102 in a closed state, ensuring that the left and right positioning plates are at the same distance from the center mark of the lead screw 102. Two lead screw bearings 109 are respectively mounted in the bearing mounting grooves of the left end cover 101 and the right end cover 105. One end of the lead screw 102 with the fixed block 404 extends from the bearing mounting groove of the right end cover 105 and is assembled and fastened with the lead screw bearing 109, so that the lead screw 102 can rotate axially.

[0033] The two support columns 106 are installed on the left end cover 101 and the right end cover 105 after passing through the support positioning holes 302 of the left positioning plate 103 and the right positioning plate 104, and the knob 108 is installed on the fixed block 404 of the lead screw 102 after being coated with locking glue. The other end of the lead screw 102 is connected to the lead screw bearing 109 of the left end cover 101, so that the lead screw 102 and the support column 106 are aligned and combined.

[0034] The chassis 107 is installed between the left end cover 101 and the right end cover 105, and is welded to the left and right end covers. The coaxiality between the central mounting hole of the chassis 107 and the central hole of the lead screw 102 is improved by combining drilling methods, and the final error should be recorded as the error of the device measurement value.

[0035] The slider bearing 111 is installed inside the center mounting hole of the finished chassis 107 , and the mounting shaft connected to the slider 110 passes through the chassis 107 and is installed on the chassis 107 via the fixing bolts 112 .

[0036] The device can rotate the screw 102 by rotating the knob 108, so that the left positioning plate 103 and the right positioning plate 104 move symmetrically and equidistantly along the screw 102, and guide the left positioning plate 103 and the right positioning plate 104 to approach or move away from the marked center of the screw 102, so that the clamping claw 1 can always be centered to adjust the clamping size. At the same time, the clamping claw 1 can rotate along the installation axis of the connecting slider 110, so as to achieve flexible avoidance during assembly and welding after centering.

[0037] like Fig. 9As shown, after the connection, the clamping jaw 1 of the flexible centering distance measuring device can only be displaced axially along the standard measuring ruler 2. The fixing bolt 112 on the clamping jaw 1 can be used to fix a single clamping jaw 1 and the standard measuring ruler 2 together. Generally, one clamping jaw 1 is fixed on the scale line 0 point of the standard measuring ruler 2, and the other clamping jaw 1 can change the measurement center distance of the two clamping jaws 1 by adjusting the position of the connecting slider 110 on the standard measuring ruler 2, thereby realizing flexible distance measurement. The slider bearing 111 provided between the connecting slider 110 of the clamping jaw 1 and the chassis 107 can ensure that the clamping jaw 1 can rotate along the measurement axis after being fixed, so as to improve flexibility and avoid unnecessary objects in the installation measurement process.

[0038] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A flexible centering distance measuring device, characterized in that: The flexible centering distance measuring device comprises two clamping claws and a measuring ruler, and the clamping claws can be displaced axially along the measuring ruler; wherein, The clamping claw is composed of a left end cover, a lead screw, a left positioning plate, a right positioning plate, a right end cover, a support column, a chassis, a knob, a lead screw bearing, a connecting slider, a slider bearing and a fixing bolt; The screw is composed of a screw shaft, a right-hand screw thread, a left-hand screw thread and a fixed block; wherein the screw shaft is the main body of the screw, and the right-hand screw thread and the left-hand screw thread have symmetrical right-hand and left-hand threads of equal length, which are distributed at both ends of the screw shaft mark center, and the outer length of the thread at both ends of the screw shaft is the same as the thickness of the left end cover and the right end cover; the outer side of one end of the right-hand screw thread of the screw shaft is connected to a fixed block; The left positioning plate and the right positioning plate have a symmetrical structure, and both are positioning plate bodies processed with support positioning holes, screw thread holes and extended clamping claws; wherein the screw thread holes and the two support positioning holes are arranged symmetrically in a triangular shape; the support positioning holes are used to penetrate the support column, the screw thread holes of the left positioning plate are adapted to the left-hand screw thread of the screw, and the screw thread holes of the right positioning plate are adapted to the right-hand screw thread of the screw; the extended clamping claw is used to clamp the workpiece, and a transition arc is arranged inside the extended clamping claw; the right positioning plate is installed on the right spiral screw thread of the screw, and the left positioning plate is installed on the screw The left spiral lead screw thread is in a closed state when it is rotated to the center position of the lead screw respectively; the two lead screw bearings are respectively installed in the bearing installation grooves of the left end cover and the right end cover; one end of the lead screw with a fixed block extends from the bearing installation groove of the right end cover and is assembled and fastened with the lead screw bearing so that the lead screw can rotate axially; the support column is installed on the left end cover and the right end cover after passing through the support positioning holes of the left positioning plate and the right positioning plate, and the knob is installed on the fixed block of the lead screw after being coated with locking glue; the other end of the lead screw is connected to the lead screw bearing of the left end cover to realize the alignment and combination of the lead screw and the support column; The chassis is installed between the left end cover and the right end cover, and the central mounting hole of the chassis is coaxial with the central hole of the lead screw; the slider bearing is installed inside the central mounting hole of the chassis, and the mounting shaft connected to the slider passes through the chassis and is installed on the chassis through fixing bolts.

2. The flexible centering and ranging device according to claim 1, characterized in that: The chassis, the left end cover and the right end cover are welded into one body.

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