Dial gauge based on photoelectric measurement
By introducing an adjustment mechanism into the dial indicator, the moving rod is reset by assisting spring compression, which solves the problem of untimely reset, ensures the continuity and accuracy of measurement, and simplifies the spring replacement process.
Patent Information
- Application Number
- CN202520538956.0
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-26
- Publication Date
- 2026-01-30
- Estimated Expiration
- 2035-03-26
AI Technical Summary
The return spring of existing dial indicators is prone to metal fatigue after prolonged use, which can cause the moving rod to not return to its original position in a timely manner or not return to its original position completely, thus affecting the measurement accuracy.
A dial indicator based on photoelectric measurement was designed. By setting an adjustment mechanism to assist spring compression, and using the cooperation of screw and moving block, the movable rod is assisted to reset. The spring is replaced after the measurement is completed.
When the spring metal is fatigued, it can effectively assist the moving rod in resetting, ensuring the continuity and accuracy of the measurement. After the measurement is completed, the spring can be easily replaced, simplifying the maintenance process.
Smart Images
Figure CN223856332U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to photoelectric type micrometer field, concretely is a micrometer based on photoelectric measurement. BACKGROUND
[0002] Micrometer is through gear or lever and converts general straight line displacement (linear motion) into the rotary motion of pointer, and then carries out reading on the scale, and micrometer is length measuring instrument, and photoelectric type usually adopts grating type photoelectric encoder, and is composed of light source, grating disc, photoelectric detector and other components. When the measuring rod moves, the grating disc will be driven to rotate, and the grating disc is engraved with equal-interval light-transmitting and non-light-transmitting stripes. The light emitted by the light source is transmitted through the stripes on the grating disc and is received by the photoelectric detector. Due to the rotation of the grating disc, the light intensity received by the photoelectric detector will periodically change with the alternating change of the light-transmitting and non-light-transmitting stripes, thereby generating an electric pulse signal corresponding to the displacement of the measuring rod.
[0003] In the prior art, the reset spring in the micrometer will be subject to metal fatigue after long-term use, so that the movable rod cannot be reset in time or cannot be completely reset after displacement, and in this case, the spring must be replaced before measurement in an emergency, which is relatively complex. CONTENT OF THE UTILITY MODEL
[0004] The utility model aims at: in order to solve the problem in the prior art, provide a kind of micrometer based on photoelectric measurement.
[0005] To achieve the above object, the utility model provides the following technical scheme: a kind of micrometer based on photoelectric measurement, including shell, digital display is installed on the outer end face of the shell, the bottom of the shell is integrally formed with the downwardly protruding guide sleeve, the inner wall of the guide sleeve is slidably connected with movable rod, the top of the shell is integrally formed with the upwardly protruding containing sleeve, the inside of the shell is installed with reset mechanism, the reset mechanism is installed with the adjusting mechanism that is penetrated to the outside below of the shell, the inside of the movable rod is installed with rotating mechanism, and the rotating mechanism is fixedly installed with grating disc at one end.
[0006] As a further scheme of the utility model: the inner wall of the shell is installed with light source lamp panel at the front end of the grating disc, and the inner wall of the shell is fixedly installed with photoelectric detector at the rear end of the grating disc, and the center of the photoelectric detector has a round hole.
[0007] As a further scheme of the utility model: the rotating mechanism includes rotating seat that is fixedly connected to the back end of the shell and penetrates the round hole of the photoelectric detector, the inner wall of the rotating seat is rotatably installed with the outwardly protruding rotating shaft, and the rotating shaft penetrates the movable rod and is fixedly connected with the center of the grating disc.
[0008] As a further scheme of the utility model: the rotating mechanism further includes a vertical slot arranged in the interior of the movable rod, a rack is integrally formed on the inner wall of the vertical slot, a gear is interference-fitted on the outer periphery of the rotating shaft in the interior of the vertical slot, and the gear is engaged with the rack.
[0009] As a further scheme of the utility model: the reset mechanism includes two guide rods integrally formed on the bottom end of the inner wall of the shell and extending upwards, a sliding plate is slidingly connected to the outer wall of the guide rod, a spring is fixedly connected to the top end of the sliding plate, and the spring is sleeved on the outer periphery of the guide rod.
[0010] As a further scheme of the utility model: the adjusting mechanism includes a screw rod rotationally connected to the bottom end of the top end plate of the guide rod, the screw rod protrudes downwards to the lower portion outside the shell, a moving block is threadedly connected to the outer wall of the screw rod, two pressing plates are fixedly connected to the two ends of the moving block, the pressing plates are sleeved on the outer periphery of the guide rod, a sliding groove for the moving block to slide up and down is arranged in the interior of the guide rod, and the bottom end of the pressing plate is fixedly connected to the top portion of the spring.
[0011] Compared with the prior art, the utility model has the beneficial effects that:
[0012] 1. By adjusting the adjusting mechanism, when the spring appears metal fatigue, the adjusting mechanism can assist the spring compression, the compressed spring can assist the movable rod to reset in the case of metal fatigue, and the spring can be replaced after measurement. BRIEF DESCRIPTION OF DRAWINGS
[0013] Figure 1 It is a structural schematic view of the utility model;
[0014] Figure 2 It is an internal structural schematic view of the utility model;
[0015] Figure 3 It is an installation schematic view of the reset mechanism of the utility model;
[0016] Figure 4 It is a structural schematic view of the utility model Figure 3 It is a local enlarged view of A in the figure;
[0017] Figure 5 It is a local enlarged view of B in the figure. Figure 3
[0018] In the figure: 1, the shell; 2, digital display; 3, guide sleeve; 4, movable rod; 5, containing sleeve; 6, rotating seat; 7, rotating shaft; 8, photoelectric detector; 9, light source lamp panel; 10, grating disc; 11, vertical slot; 12, guide rod; 13, sliding plate; 14, gear; 15, rack; 16, screw; 17, moving block; 18, pressing plate; 19, spring. DETAILED DESCRIPTION
[0019] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model.
[0020] Please refer to Figures 1-5 In the embodiments of the utility model, a dial gauge based on photoelectric measurement includes a shell 1, a digital display 2 is installed on the outer end face of the shell 1, a downward protruding guide sleeve 3 is integrally formed at the bottom end of the shell 1, a movable rod 4 is slidably connected to the inner wall of the guide sleeve 3, an upward protruding containing sleeve 5 is integrally formed at the top of the shell 1, a reset mechanism is installed inside the shell 1, an adjusting mechanism is installed on the reset mechanism and penetrates to the lower side outside the shell 1, a rotating mechanism is installed inside the movable rod 4, a grating disc 10 is fixedly installed at one end of the rotating mechanism, a light source lamp panel 9 is installed on the inner wall of the shell 1 and located at the front end of the grating disc 10, a photoelectric detector 8 is fixedly installed on the inner wall of the shell 1 and located at the rear end of the grating disc 10, and the photoelectric detector 8 has a circular hole at the center.
[0021] In the embodiments, when measuring, the object to be measured contacts the top of the movable rod 4, the movable rod 4 moves upward, at this time, the reset mechanism is pulled up, and the upward movable rod 4 drives the grating disc 10 to rotate through the rotating mechanism, when the movable rod 4 moves, the grating disc 10 rotates, since the grating disc 10 is engraved with equal-interval light-transmitting and non-light-transmitting stripes, the light emitted by the light source lamp panel 9 is received by the photoelectric detector 8 after transmitting through the stripes on the grating disc 10. Due to the rotation of the grating disc 10, the light intensity received by the photoelectric detector 8 periodically changes with the alternating change of the light-transmitting and non-light-transmitting stripes, thereby generating an electric pulse signal corresponding to the displacement of the movable rod 4, and finally the number is displayed on the digital display 2 after decoding.
[0022] Please refer to Figure 2 and Figure 3The rotating mechanism comprises a rotating base 6 fixedly connected to the back end of the shell 1 and penetrating the circular hole of the photoelectric detector 8, an outwardly protruding rotating shaft 7 rotatably arranged on the inner wall of the rotating base 6, the rotating shaft 7 penetrating the movable rod 4 and being fixedly connected to the center of the grating disc 10, and a vertical slot 11 arranged in the inner portion of the movable rod 4, wherein the inner wall of the vertical slot 11 is integrally formed with a rack 15, the outer periphery of the rotating shaft 7 is interference-fitted with a gear 14 arranged in the inner portion of the vertical slot 11, and the gear 14 is engaged with the rack 15.
[0023] In the embodiment, during the up-and-down movement of the movable rod 4, the movable rod 4 drives the rack 15 to move synchronously, the moving rack 15 drives the gear 14 to rotate, the rotating gear 14 drives the rotating shaft 7 to rotate synchronously, and the rotating shaft 7 drives the grating disc 10 to rotate.
[0024] Please refer to Figure 3 and Figure 5 The reset mechanism comprises two guide rods 12 integrally formed on the bottom end of the inner wall of the shell 1 and extending upward, a sliding plate 13 slidably connected to the outer wall of the guide rod 12, a spring 19 fixedly connected to the top end of the sliding plate 13, and the spring 19 sleeved on the outer periphery of the guide rod 12.
[0025] In the embodiment, during the movement of the movable rod 4, the movable rod 4 drives the sliding plate 13 to move upward synchronously, the upward movement of the sliding plate 13 compresses the spring 19, and after the measurement is completed, the spring 19 drives the movable rod 4 to reset downward.
[0026] Please refer to Figure 3 and Figure 5 The adjusting mechanism comprises a screw rod 16 rotatably connected to the bottom end of the top end plate of the guide rod 12, the screw rod 16 protruding downward to the outside of the shell 1, a moving block 17 threadedly connected to the outer wall of the screw rod 16, a pressing plate 18 fixedly connected to the two ends of the moving block 17, the pressing plate 18 sleeved on the outer periphery of the guide rod 12, a sliding groove for the upward and downward sliding movement of the moving block 17 arranged in the inner portion of the guide rod 12, and the bottom end of the pressing plate 18 fixedly connected to the top portion of the spring 19.
[0027] In the embodiment, during the long-time use of the spring 19, when the spring 19 is relaxed due to metal fatigue and the movable rod 4 cannot be efficiently reset, a tool (such as a wrench) is connected to the hexagonal block at the bottom end of the screw rod 16, and the screw rod 16 is driven to rotate, the rotating screw rod 16 drives the moving block 17 to move downward, the downward displacement of the moving block 17 drives the pressing plate 18 to move downward synchronously, and the spring 19 is compressed, thereby compensating for the problem of the decrease of the reset force of the spring 19.
[0028] The above merely describes a preferred embodiment of the present application, and the protection scope of the present application is not limited thereto, and any skilled person in the art, according to the technical scheme and the inventive concept of the present application, makes equivalent replacement or change within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.
Claims
1. An optical-electrometric based dial gauge comprising a housing (1), characterised in that, The outer shell (1) is provided with a digital display (2) on one end of the outer shell (1), the bottom of the outer shell (1) is integrally formed with a downward protruding guide sleeve (3), the inner wall of the guide sleeve (3) is slidably connected with a movable rod (4), the top of the outer shell (1) is integrally formed with an upward protruding accommodating sleeve (5), the inside of the outer shell (1) is provided with a reset mechanism, the reset mechanism is provided with an adjusting mechanism penetrating to the lower side of the outside of the outer shell (1), the inside of the movable rod (4) is provided with a rotating mechanism, one end of the rotating mechanism is fixedly provided with a grating disc (10).
2. An optical-electrometric based dial gauge according to claim 1, wherein, The inner wall of the outer shell (1) is provided with a light source lamp disc (9) at the front end of the grating disc (10), the inner wall of the outer shell (1) is fixedly provided with a photoelectric detector (8) at the rear end of the grating disc (10), the center of the photoelectric detector (8) is provided with a circular hole.
3. An optical-electrometric based dial gauge according to claim 2, wherein, The rotating mechanism comprises a rotating seat (6) fixedly connected to the back end of the outer shell (1) and penetrating the circular hole of the photoelectric detector (8), the inner wall of the rotating seat (6) is rotatably provided with an outward protruding rotating shaft (7), the rotating shaft (7) penetrates the movable rod (4) and is fixedly connected with the center of the grating disc (10).
4. An optical-electrometric based dial gauge according to claim 3, wherein, The rotating mechanism further comprises a vertical slot (11) formed in the inside of the movable rod (4), the inner wall of the vertical slot (11) is integrally formed with a rack (15) on one side, the outer periphery of the rotating shaft (7) is interference-fitted with a gear (14) in the inside of the vertical slot (11), and the gear (14) is engaged with the rack (15).
5. An optical-electrometric based dial gauge according to claim 4, wherein, The reset mechanism comprises two guide rods (12) integrally formed on the inner wall of the outer shell (1) and extending upward, the outer wall of the guide rod (12) is slidably connected with a sliding plate (13), the top end of the sliding plate (13) is fixedly connected with a spring (19), and the spring (19) is sleeved on the outer periphery of the guide rod (12).
6. An optical-electromotive force measurement-based dial gauge according to claim 5, characterized by The adjusting mechanism comprises a screw rod (16) rotatably connected with the bottom end of the top end plate of the guide rod (12), the screw rod (16) protrudes downward to the outside of the outer shell (1), the outer wall of the screw rod (16) is threadedly connected with a moving block (17), the two ends of the moving block (17) are fixedly connected with a pressing plate (18), the pressing plate (18) is sleeved on the outer periphery of the guide rod (12), the inside of the guide rod (12) is clamped with a sliding groove for the upward and downward sliding of the moving block (17), and the bottom end of the pressing plate (18) is fixedly connected with the top of the spring (19).