Length metering device

Abstract

The utility model relates to the technical field of length metering, and discloses a length metering device which comprises a main ruler, a measuring jaw and a depth ruler, the outer wall of the measuring jaw is provided with a plurality of sub-cross-shaped grooves, the outer wall of the measuring jaw is provided with an embedding groove, the inner wall of the embedding groove is fixedly connected with a first mother magnet, and the inner wall of the first mother magnet is fixedly connected with a second mother magnet. A first sub-magnet is fixedly connected to the outer wall of the main ruler, two main cross-shaped grooves are formed in the outer wall of the main ruler, bolt columns are fixedly connected to the inner walls of the multiple sub-cross-shaped grooves, and multiple limiting strips are fixedly connected to the outer walls of the two bolt columns. According to the utility model, the protruding block on the main ruler is embedded into the embedding groove, the first mother magnet and the first son magnet are mutually attracted, then the bolt columns with the limiting strips respectively penetrate through the mother and son cross-shaped grooves, and then the magnets in the fixing caps and the magnets on the bolt columns are mutually attracted, so that the final clamping and dismounting operation can be completed. Local abrasion is prevented from affecting overall precision, and use cost is effectively reduced.

Description

Technical Field

[0001] This utility model relates to the field of length measurement technology, and in particular to a length measurement device. Background Technology

[0002] Human perception of space began with the exploration of length. Length is a fundamental attribute of an object occupying space and permeates the fields of architecture, manufacturing, and scientific research. Precise measurement of length has become an important cornerstone for the development of civilization. To meet the needs of different scenarios, people have created vernier calipers, laser rangefinders, and coordinate measuring machines. These devices, through the integration of mechanical, optical, and electronic technologies, achieve precise measurements from the micrometer level to the kilometer level, improving the efficiency and accuracy of industrial production and technological innovation.

[0003] Traditional length measuring devices achieve high-precision measurement through the difference in scales between the main scale and the vernier scale. The principle is based on mechanical cooperation, with the main scale fixed and the vernier scale moving by sliding the measuring jaws. The measurement value is read by aligning the scale lines of the two scales. This structure depends on the machining accuracy and assembly quality, and maintenance requires the entire device to be replaced or returned to the factory for calibration, which is costly.

[0004] Existing length measuring devices improve the material process based on the traditional structure, using high-hardness alloys to reduce the wear rate to some extent. However, in actual use, the measuring jaws and the main scale are fixedly connected and cannot be disassembled and replaced separately. When the measuring jaws are locally worn due to frequent use or accidental collisions, the auxiliary scale must be replaced as a whole or the entire caliper must be scrapped. This not only increases the cost of use, but also affects the overall accuracy due to local wear, leading to inaccurate measurement results. Therefore, a length measuring device is proposed to solve the above problems. Utility Model Content

[0005] To overcome the above shortcomings, this utility model provides a length measuring device, which aims to improve the situation in the prior art where the measuring jaws cannot be disassembled and replaced individually. When the measuring jaws are partially worn due to frequent use or accidental collisions, the entire scale needs to be replaced or the entire caliper needs to be scrapped, which increases the cost of use. Furthermore, the local wear affects the overall accuracy, leading to inaccurate measurement results.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: a length measuring device, comprising a main scale, a measuring jaw, and a depth gauge. The outer wall of the measuring jaw has multiple sub-cross grooves, and the outer wall of the measuring jaw has an embedding groove. A first female magnet is fixedly connected to the inner wall of the embedding groove. A first female magnet is fixedly connected to the outer wall of the main scale. Two female cross grooves are formed on the outer wall of the main scale. Each of the multiple sub-cross grooves has a fixed post fixedly connected to its inner wall. Multiple limiting strips are fixedly connected to the outer walls of the two fixed posts. A second female magnet is fixedly connected to the outer walls of the two fixed posts. A fixing cap is fixedly connected to the outer walls of the two fixed posts. A limiting groove is formed on the inner wall of the two fixing caps. A second female magnet is fixedly connected to the inner wall of the two fixing caps. A reinforcing mechanism is provided on the inner wall of the depth gauge to improve the strength of the depth gauge itself.

[0007] As a further description of the above technical solution:

[0008] The reinforcement mechanism includes a wear-resistant layer, the outer wall of which is fixedly connected to the inner wall of the depth gauge, a pressure relief groove on the outer wall of the wear-resistant layer, multiple reinforcement columns fixedly connected to the inner wall of the wear-resistant layer, a sound-absorbing layer fixedly connected to the inner wall of the wear-resistant layer, and an inner layer fixedly connected to the inner wall of the sound-absorbing layer.

[0009] As a further description of the above technical solution:

[0010] A vernier scale is slidably connected to the inner wall of the main scale, and a caliper float is fixedly connected to the top of the outer wall of the vernier scale.

[0011] As a further description of the above technical solution:

[0012] The vernier scale is fixedly connected to a push wheel, which is made of alloy material.

[0013] As a further description of the above technical solution:

[0014] A screw is fixedly connected to the top of the outer wall of the main ruler, and a fixing plate is threadedly connected to the outer wall of the screw.

[0015] As a further description of the above technical solution:

[0016] The outer wall of the depth gauge is fixedly connected to a gauge frame limiting block, and the outer wall of the gauge frame limiting block is provided with a lifting hole.

[0017] As a further description of the above technical solution:

[0018] The vernier scale is rotatably connected to a limit nut on its outer wall, and the surface of the limit nut is rounded.

[0019] As a further description of the above technical solution:

[0020] The main scale is fixedly connected to the top of its outer wall with measuring scales arranged at equal intervals.

[0021] This utility model has the following beneficial effects:

[0022] 1. In this utility model, the protruding block on the main scale is embedded into the embedding groove in the measuring jaw, and the first female magnet and the first female magnet attract each other. Then, the pin with the limit strip passes through the female cross groove and the female cross groove. Finally, the second female magnet in the fixing cap attracts the second female magnet on the pin to complete the final locking and fixing. The disassembly operation is the reverse of the steps. This structure enables the rapid disassembly and replacement of the measuring jaw, avoids local wear affecting the overall accuracy, and effectively reduces the cost of use.

[0023] 2. In this utility model, the outer wall of the wear-resistant layer is fixedly connected to the inner wall of the depth gauge, which reduces the wear of the measuring surface. The pressure relief groove is designed to disperse the stress caused by temperature changes and mechanical loads, preventing structural deformation and cracking. The wear-resistant layer strengthens the rigidity of the gauge body to avoid data deviation caused by bending under force. The sound-absorbing layer absorbs the friction and collision energy of the buffer components to reduce noise. The inner layer provides a support frame for the internal components and blocks the intrusion of external dust and moisture. The entire structure effectively improves the strength of the depth gauge itself. Attached Figure Description

[0024] Figure 1 This is a perspective view of a length measuring device proposed in this utility model;

[0025] Figure 2 This is a front view of a length measuring device proposed in this utility model;

[0026] Figure 3 This is a partial exploded view of a length measuring device proposed in this utility model;

[0027] Figure 4 This is a cross-sectional view of the fixing cap of a length measuring device proposed in this utility model;

[0028] Figure 5 This is a partial cross-sectional view of the measuring jaws of a length measuring device proposed in this utility model;

[0029] Figure 6 This is a cross-sectional view of the depth gauge of a length measuring device proposed in this utility model;

[0030] Legend:

[0031] 1. Main scale; 2. Reinforcing mechanism; 201. Wear-resistant layer; 202. Pressure relief groove; 203. Reinforcing column; 204. Sound-absorbing layer; 205. Inner layer; 3. Measuring jaws; 4. Sub-cross groove; 5. Embedded groove; 6. First female magnet; 7. First female magnet; 8. Female cross groove; 9. Bolt; 10. Limiting strip; 11. Second female magnet; 12. Fixing cap; 13. Limiting groove; 14. Second female magnet; 15. Vernier scale; 16. Caliper float; 17. Limiting nut; 18. Push wheel; 19. Screw; 20. Fixing plate; 21. Frame limiting block; 22. Lifting hole; 23. Depth gauge; 24. Measuring scale. Detailed Implementation

[0032] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0033] Reference Figure 3 , Figure 4 and Figure 5 This utility model provides an embodiment of a length measuring device, including a main scale 1, measuring jaws 3, and a depth gauge 23. The measuring jaws 3 contact the inner and outer diameters or thickness of the object being measured by clamping or expanding outwards. The main scale 1 provides basic measurement graduations 24 and a main length reference. The depth gauge 23 extends from the end of the main scale 1 and is specifically used to measure the vertical depth of holes and grooves. The outer wall of the measuring jaws 3 has multiple sub-cross grooves 4 and an embedding groove 5. A first female magnet 6 is fixedly connected to the inner wall of the embedding groove 5. A first female magnet 7 is fixedly connected to the outer wall of the main scale 1. The embedding groove 5, the first female magnet 6, and the first female magnet 7 cooperate to fix the transverse main scale 1 and the measuring jaws 3. The outer wall of the main scale 1 has two female cross grooves 8 and multiple... The inner walls of the sub-cross grooves 4 are all fixedly connected with bolts 9. The mother cross grooves 8, sub-cross grooves 4, bolts 9 and limiting strips 10 cooperate with each other to fix the longitudinal direction. The fixing cap 12 uses the second sub-magnet 14 fixed inside it to achieve magnetic attraction with the second mother magnet 11 on the bolt 9. The outer walls of the two bolts 9 are all fixedly connected with multiple limiting strips 10. The outer walls of the two bolts 9 are all fixedly connected with second mother magnets 11. The outer walls of the two bolts 9 are all fixedly connected with fixing caps 12. The inner walls of the two fixing caps 12 are all opened with limiting grooves 13. The inner walls of the two fixing caps 12 are all fixedly connected with second sub-magnets 14. The inner wall of the depth gauge 23 is provided with a reinforcing mechanism 2. The reinforcing mechanism 2 is used to improve the strength of the depth gauge 23 itself.

[0034] Specifically, the measuring jaws 3 clamp or extend to contact the inner and outer diameters and thickness of the object being measured. The main scale 1 serves as the carrier of the basic measuring scale 24 and the core structure of the length reference. The depth gauge 23 is designed to extend from the end of the main scale 1 and is specifically designed for measuring the vertical depth of hole-like structures. The outer wall of the measuring jaws 3 has multiple sub-cross grooves 4 and an embedded groove 5. The inner wall of the embedded groove 5 is fixedly installed with a first female magnet 6, and the outer wall of the main scale 1 is correspondingly fixed with a first female magnet 7. The first female magnet 6 and the first female magnet 7 in the embedded groove 5 cooperate through magnetic attraction to ensure the positioning stability of the main scale 1 and the measuring jaws 3 in the lateral dimension. The outer wall of the main scale 1 is provided with two female cross grooves 8, and the inner walls of the multiple sub-cross grooves 4 are fixed with anchor posts 9. The mother cross groove 8, the daughter cross groove 4, the bolt 9, and the limiting strip 10 together construct a locking mechanism for the longitudinal dimension. The fixing cap 12 forms a magnetic attraction with the second mother magnet 11 on the surface of the bolt 9 through the second daughter magnet 14 inside. Multiple limiting strips 10 are fixed on the outer walls of the two bolts 9. The second mother magnet 11 and the fixing cap 12 are integrated on the outer walls of the two bolts 9 respectively. The inner walls of the two fixing caps 12 are opened with limiting grooves 13 and the second daughter magnets 14 are fixed. Physical constraints are achieved by the interlocking of the limiting grooves 13 and the limiting strips 10. The inner wall of the depth gauge 23 is equipped with a reinforcement mechanism 2. This mechanism improves the overall bending resistance of the depth gauge 23 through the strengthening structural design, ensuring the rigidity and accuracy stability of the gauge body during the measurement process.

[0035] Reference Figure 1 and Figure 5 The reinforcement mechanism 2 includes a wear-resistant layer 201, which is used to reduce wear on the measuring surface and maintain accuracy and surface smoothness under long-term use. The outer wall of the wear-resistant layer 201 is fixedly connected to the inner wall of the depth gauge 23. The outer wall of the wear-resistant layer 201 is provided with a pressure relief groove 202, which can disperse the stress generated by the support column due to temperature changes, mechanical load or vibration. The inner wall of the wear-resistant layer 201 is fixedly connected with multiple reinforcement columns 203, which enhances the rigidity of the gauge body and prevents data errors caused by bending under force during measurement. The inner wall of the wear-resistant layer 201 is fixedly connected with a sound-absorbing layer 204, which reduces the noise when the components rub or collide and improves the comfort of operation. The inner wall of the sound-absorbing layer 204 is fixedly connected with an inner layer 205, which provides structural support or isolates internal components to prevent the intrusion of the external environment.

[0036] Specifically, the reinforcement mechanism 2 consists of a wear-resistant layer 201, the outer wall of which is fixedly connected to the inner wall of the depth gauge 23. Its main function is to reduce wear on the measuring surface to maintain the accuracy and surface smoothness of long-term use. The outer wall of the wear-resistant layer 201 has a pressure relief groove 202, which is designed to disperse the stress caused by mechanical load vibration of the support column due to temperature changes, and to prevent structural deformation and cracking. Multiple reinforcement columns 203 are fixedly installed on the inner wall of the wear-resistant layer 201 to strengthen the rigidity of the gauge body and prevent data deviation caused by bending under measurement force. The inner wall of the wear-resistant layer 201 is also connected to a sound-absorbing layer 204. This layer reduces noise interference by absorbing and buffering the friction and collision energy between components, and optimizes the comfort of the operating environment. The inner wall of the sound-absorbing layer 204 integrates an inner layer 205, which provides a support frame for the internal components and blocks the intrusion of environmental factors such as external dust and moisture, ensuring the cleanliness and stability of the internal mechanism.

[0037] Reference Figure 1 A vernier scale 15 is slidably connected to the inner wall of the main scale 1, which works with the main scale 1 to achieve high-precision decimal readings. A caliper float 16 is fixedly connected to the top of the outer wall of the vernier scale 15 to lock the position of the vernier scale 15 and ensure stable readings. A push wheel 18, made of alloy material, is fixedly connected to the outer wall of the vernier scale 15 to assist the fingers in finely moving the vernier scale 15 to adjust the measurement position. A limit nut 17 is rotatably connected to the outer wall of the vernier scale 15 to adjust and fix the tightness of the vernier scale 15 and prevent slippage. The surface of the limit nut 17 is made of alloy material. With a smooth finish, a screw 19 is fixedly connected to the top of the outer wall of the main scale 1. A fixing plate 20 is threadedly connected to the outer wall of the screw 19. The screw 19 and the fixing plate 20 work together to reinforce the main scale 1. A ruler frame limiting block 21 is fixedly connected to the outer wall of the depth gauge 23, which limits the movement range of the vernier scale 15 and avoids excessive displacement. A lifting hole 22 is opened on the outer wall of the ruler frame limiting block 21 for fixing the device. A measuring scale 24 is fixedly connected to the top of the outer wall of the main scale 1. The standard length unit marked on it serves as the measurement reference. The measuring scale 24 is arranged at equal intervals.

[0038] Specifically, the inner wall of the main scale 1 slides in conjunction with the vernier scale 15, achieving high-precision decimal reading through their combined action. A caliper float 16 is fixed to the top of the outer wall of the vernier scale 15, maintaining its positional stability through a mechanical locking mechanism to ensure accurate reading. A push wheel 18 is integrated into the outer wall of the vernier scale 15; this component is made of high-strength alloy material, and its textured surface design enhances finger friction, assisting users in precisely adjusting the measurement positioning of the vernier scale 15. A limit nut 17 is installed on the outer wall of the vernier scale 15 via a threaded structure. Rotation adjusts the frictional resistance between the vernier scale 15 and the main scale 1, preventing slippage errors caused by loosening during measurement. The surface of the limiting nut 17 is treated with a rounded polishing process to eliminate the risk of scratches to the hands during operation. The top of the outer wall of the main scale 1 is fixed with screws 19, which together with the threaded fixed plate 20 constitute the reinforcement unit of the main scale 1, improving the overall structure's resistance to deformation. The outer wall of the depth gauge 23 is provided with a scale frame limiting block 21, which limits the movement of the vernier scale 15 to prevent excessive sliding and mechanical damage. The outer wall of the scale frame limiting block 21 is machined with lifting holes 22, which provides an external hanging and fixing interface for easy storage and transportation of the equipment. The top of the outer wall of the main scale 1 is engraved with measuring scales 24, which mark standard length unit values ​​in an equidistant manner, serving as the core reference system for measurement.

[0039] Working principle: First, the protruding block on the main scale 1 is embedded in the embedding groove 5 of the measuring jaw 3. The initial positioning is completed by the magnetic attraction of the first female magnet 6 and the first female magnet 7. Then, the pin 9 carrying the limiting strip 10 passes through the female cross groove 4 and the female cross groove 8 to achieve longitudinal limiting. The fixing cap 12 is attracted by the magnetic force of the second female magnet 11 on the surface of the pin 9 using the second female magnet 14 inside, to complete the double locking in the horizontal and vertical directions. When disassembling, the magnetic attraction components are separated in reverse order and the pin 9 and fixing cap 12 are removed. This structural design allows the measuring jaw 3 to be quickly disassembled and replaced, avoiding the decrease in measurement accuracy due to excessive wear of a single component. At the same time, it reduces the high maintenance costs caused by overall replacement, and improves the service life and economy of the tool.

[0040] Furthermore, the outer wall of the wear-resistant layer 201 is fixedly connected to the inner wall of the depth gauge 23, which reduces wear on the measuring surface and maintains long-term accuracy and surface smoothness. The pressure relief groove 202 is designed to disperse the stress caused by temperature changes and mechanical loads, preventing structural deformation and cracking. The inner wall of the wear-resistant layer 201 is equipped with reinforcing columns 203, which strengthens the rigidity of the gauge body and prevents data deviation caused by bending under force. The sound-absorbing layer 204 absorbs the friction and collision energy of the buffer components to reduce noise and optimize the operating environment. The inner wall of the sound-absorbing layer 204 integrates an inner layer 205, which provides a supporting skeleton for the internal components and blocks the intrusion of external dust and moisture. The entire structure effectively improves the strength of the depth gauge 23 itself.

[0041] Finally, it should be noted that the above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Although the present utility model has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A length measuring device, comprising a main scale (1), measuring jaws (3), and a depth gauge (23), characterized in that: The outer wall of the measuring jaw (3) is provided with multiple sub-cross grooves (4), the outer wall of the measuring jaw (3) is provided with an embedding groove (5), the inner wall of the embedding groove (5) is fixedly connected with a first female magnet (6), the outer wall of the main scale (1) is fixedly connected with a first female magnet (7), the outer wall of the main scale (1) is provided with two female cross grooves (8), the inner walls of the multiple sub-cross grooves (4) are fixedly connected with studs (9), the outer walls of the two studs (9) are fixedly connected with multiple limit strips (10), the outer walls of the two studs (9) are fixedly connected with a second female magnet (11), the outer walls of the two studs (9) are fixedly connected with a fixing cap (12), the inner walls of the two fixing caps (12) are provided with limit grooves (13), the inner walls of the two fixing caps (12) are fixedly connected with a second female magnet (14), the inner wall of the depth gauge (23) is provided with a reinforcing mechanism (2), the reinforcing mechanism (2) is used to improve the strength of the depth gauge (23) itself.

2. The length measuring device according to claim 1, characterized in that: The reinforcement mechanism (2) includes a wear-resistant layer (201), the outer wall of which is fixedly connected to the inner wall of the depth gauge (23), a pressure relief groove (202) is provided on the outer wall of the wear-resistant layer (201), a plurality of reinforcement columns (203) are fixedly connected to the inner wall of the wear-resistant layer (201), a sound-absorbing layer (204) is fixedly connected to the inner wall of the wear-resistant layer (201), and an inner layer (205) is fixedly connected to the inner wall of the sound-absorbing layer (204).

3. The length measuring device according to claim 1, characterized in that: The inner wall of the main scale (1) is slidably connected to a vernier scale (15), and the top of the outer wall of the vernier scale (15) is fixedly connected to a caliper float (16).

4. The length measuring device according to claim 3, characterized in that: The outer wall of the vernier scale (15) is fixedly connected to a pusher (18), which is made of alloy material.

5. A length measuring device according to claim 1, characterized in that: The top of the outer wall of the main scale (1) is fixedly connected to a screw (19), and the outer wall of the screw (19) is threadedly connected to a fixing plate (20).

6. A length measuring device according to claim 1, characterized in that: The outer wall of the depth gauge (23) is fixedly connected to a gauge frame limiting block (21), and the outer wall of the gauge frame limiting block (21) is provided with a lifting hole (22).

7. A length measuring device according to claim 3, characterized in that: The outer wall of the vernier scale (15) is rotatably connected to a limiting nut (17), and the surface of the limiting nut (17) is rounded.

8. A length measuring device according to claim 1, characterized in that: The main scale (1) has a measuring scale (24) fixedly connected to the top of its outer wall, and the measuring scale (24) is arranged at equal intervals.

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