A laser caliper facilitating improvement of measurement accuracy
The design of threaded shaft connection and corrugated folding curtain solves the problem of unstable device position in laser diameter gauge, improves measurement accuracy and vibration resistance, and protects the lens.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- SHAOXING SIJIU TECH CO LTD
- Filing Date
- 2025-06-25
- Publication Date
- 2026-07-21
AI Technical Summary
In existing laser diameter gauges, the positioning and locking of the laser emitting and receiving devices are unstable and prone to loosening, affecting the accuracy of the measurement.
A threaded shaft is used to connect the guide shaft and the guide hole, combined with a corrugated folding curtain and a rubber protective ring to achieve stable locking and positioning of the laser transmitter and receiver, and a damping spring damper is used to reduce the impact of external vibration.
It achieves stable adjustment and locking of the laser emitting and receiving devices, reduces dust ingress, improves measurement accuracy, protects the lens, and reduces the impact of external vibrations.
Smart Images
Figure CN224535023U_ABST
Abstract
Description
Technical Field
[0001] The utility model belongs to the technical field of laser diameter gauges, and particularly relates to a laser diameter gauge which is convenient for improving measurement accuracy. Background Technique
[0002] A laser diameter gauge is a precision instrument that uses a laser beam to perform non-contact, high-precision, and rapid measurement of the outer diameter of an object. It is widely used in industrial production (such as the production of wire and cable, optical fiber, bearing, pipe, glass tube, etc.) and quality control.
[0003] At present, a Chinese patent with the publication number CN216206065U and the publication date of April 5, 2022 discloses a measuring space-adjustable diameter gauge, which includes a base, a laser emitting device arranged on the base, and a receiving device arranged on the base. At the top of the end face of the base close to the laser emitting device, there are two chutes extending along its length direction and having a "convex" cross-section. On the lower surface of the laser emitting device, there are two sliding strips respectively slidingly connected in the two chutes; in the middle of the end face of the base close to the laser emitting device, there is a cavity extending along its length direction. On the upper surface of the base, there is a kidney-shaped hole communicating with the cavity and extending along its length direction. On the lower surface of the laser emitting device, there is a tooth groove extending along its length direction and passing through the kidney-shaped hole. In the cavity of the base, there is a limit unlocking mechanism for engaging or disengaging from the tooth groove.
[0004] Among them, the laser emitting device and the receiving device are slidingly connected to the base, and the sliding position is limited by the limit unlocking mechanism; the limit unlocking mechanism controls the engagement of the rack and the tooth groove through a pressing piece and a spring. However, during the use process, the engagement between the rack and the tooth groove is not stable and is prone to loosening, which is not conducive to the stable locking of the positions between the laser emitting device and the receiving device. Content of the Utility Model
[0005] The purpose of the utility model is to provide a laser diameter gauge which is convenient for improving measurement accuracy and can perform stable locking and positioning of the positions of the laser emitting device and the receiving device.
[0006] The above technical object of the present utility model is achieved through the following technical solutions: A laser diameter gauge facilitating the improvement of measurement accuracy, comprising a laser emitting device, a receiving device, and a base disposed on the lower side of the laser emitting device. At one end of the laser emitting device close to the receiving device, a first mounting head is provided. At one end of the receiving device close to the laser emitting device, a second mounting head is provided. On both sides of the lower part of the second mounting head, guide shafts are provided. Guide holes for the guide shafts to pass through are formed in both the laser emitting device and the first mounting head. A threaded hole is formed in one of the guide shafts. At one end of the laser emitting device far from the receiving device, a threaded shaft threadedly connected to the threaded hole is provided. At one end of the threaded shaft far from the guide shaft, a knob is further provided. The threaded shaft is circumferentially rotatably connected and axially fixedly connected in the guide hole. A rubber protection ring for abutting against the second mounting head is provided on the circumferential side of the first mounting head.
[0007] A further setting of the present utility model is: At one end of the laser emitting device far from the receiving device, a shaft sleeve for the threaded shaft to pass through is provided. An annular groove is formed on the inner wall of the circumferential side of the shaft sleeve. A positioning ring embedded in the annular groove is provided on the circumferential side of the threaded shaft.
[0008] A further setting of the present utility model is: Above the laser emitting device and the receiving device, a corrugated folding curtain with a "冂"-shaped cross-section is provided.
[0009] A further setting of the present utility model is: Elastic buckles with a "冂"-shaped cross-section are provided at both ends of the corrugated folding curtain and are respectively clamped at the positions of the first mounting head and the second mounting head.
[0010] A further setting of the present utility model is: An opening groove for a wire to pass through is formed in the middle of the corrugated folding curtain.
[0011] A further setting of the present utility model is: A circular seat plate is provided at the lower end of the base. A plurality of damping spring shock absorbers are provided on the circumferential side of the lower surface of the seat plate.
[0012] A further setting of the present utility model is: Scales are also marked on the outer wall of the side of the guide shaft.
[0013] In summary, the present utility model has the following beneficial effects:
[0014] 1. When it is necessary to adjust the distance between the laser emitting device and the receiving device, by rotating the threaded shaft, since the threaded shaft is circumferentially rotated and axially fixed in the guide hole, and the threaded shaft is threaded in the threaded hole of one side of the guide shaft, as the threaded shaft rotates, the guide shaft can be driven to move in the guide hole, and then the guide shaft can drive the receiving device to move, thereby realizing the stable adjustment of the distance between the laser emitting device and the receiving device. At the same time, the threaded connection method is also conducive to the stable locking and positioning of the laser emitting device and the receiving device.
[0015] When no testing is required, the distance between the laser emitting device and the receiving device is shortened until the rubber protective ring of the first mounting head abuts against the second mounting head. At this point, the laser emitting device and the receiving device can be brought into contact, which helps to protect the lens position of the laser emitting device and the receiving device, and also helps to prevent dust from entering the lens position of the laser emitting device and the receiving device.
[0016] 2. The threaded shaft uses a locating ring on its circumferential side to be embedded in the annular groove on the inner wall of the bushing. At this time, the threaded shaft can be circumferentially rotated and axially fixed in the guide hole.
[0017] 3. When the wire to be tested passes between the laser emitting device and the receiving device, the upper side of the wire can be wrapped and protected by a corrugated folding curtain, thereby reducing the possibility of dust falling into the surface of the wire during the testing process, which ultimately helps to improve the measurement accuracy; at the same time, since the corrugated folding curtain can be stretched and folded, it can be adapted to laser emitting devices and receiving devices with different spacing.
[0018] 4. The corrugated folding curtain uses elastic buckles at both ends to lock onto the first and second mounting heads respectively, thereby enabling quick and detachable connection of the corrugated folding curtain to the upper side of the laser emitting and receiving devices, which is beneficial for the replacement and maintenance of the corrugated folding curtain;
[0019] 5. The corrugated folding curtain uses an opening groove in the middle for the wire to pass through, thus facilitating the smooth passage of the wire through the corrugated folding curtain;
[0020] 6. Multiple damping spring vibration dampers are installed on the lower surface of the base plate at the bottom of the base plate. The damping spring vibration dampers can play a role in damping the vibration and prevent the vibration transmitted from the ground from affecting the accuracy of the measurement.
[0021] 7. The scale marked on the outer side of the guide shaft facilitates accurate adjustment of the distance between the laser emitting device and the receiving device. Attached Figure Description
[0022] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0023] Figure 1 This is a schematic diagram of the structure of this utility model;
[0024] Figure 2 This is a partial sectional view of the connection relationship between the laser emitting device, the receiving device, and the guide shaft in this utility model;
[0025] Figure 3 This is an exploded view showing the connection relationship between the laser emitting device, the receiving device, and the corrugated folding curtain in this utility model.
[0026] In the diagram, 1. Laser emitting device; 11. First mounting head; 111. Rubber protective ring; 12. Guide hole; 13. Bushing; 131. Ring groove; 2. Receiving device; 21. Second mounting head; 22. Guide shaft; 221. Threaded hole; 3. Base; 31. Seat plate; 32. Damping spring vibration damper; 4. Threaded shaft; 41. Knob; 42. Positioning ring; 5. Corrugated folding curtain; 51. Elastic buckle; 52. Opening groove. Detailed Implementation
[0027] The technical solutions in the embodiments will be clearly and completely described below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without creative effort are within the scope of protection of this utility model.
[0028] A laser diameter gauge that facilitates improved measurement accuracy, referring to... Figure 1 This laser diameter measuring instrument, which facilitates improved measurement accuracy, includes a laser emitting device 1, a receiving device 2, and a base 3 fixed to the lower side of the laser emitting device 1 by bolts. The lower end of the base 3 is welded with a circular seat plate 31, and multiple damping spring dampers 32 are fixed to the periphery of the lower surface of the seat plate 31 by bolts. The multiple damping spring dampers 32 are evenly spaced along the periphery of the seat plate 31.
[0029] Reference Figure 1 , Figure 2, at one end of the laser emitting device 1 close to the receiving device 2, a first mounting head 11 is integrally provided. At one end of the receiving device 2 close to the laser emitting device 1, a second mounting head 21 is integrally provided. On both sides of the lower part of the second mounting head 21, guide shafts 22 are fixed by bolts, and scales are marked on the outer walls of the sides of the guide shafts 22. Guide holes 12 for the guide shafts 22 to pass through are provided in both the laser emitting device 1 and the first mounting head 11. At the same time, a threaded hole 221 is provided in one of the guide shafts 22. At one end of the laser emitting device 1 away from the receiving device 2, a threaded shaft 4 is provided which is threadedly connected to the threaded hole 221. At one end of the threaded shaft 4 away from the guide shaft 22, a knob 41 is welded. The threaded shaft 4 is circumferentially rotatably connected and axially fixedly connected in the guide hole 12. At one end of the laser emitting device 1 away from the receiving device 2, a sleeve 13 for the threaded shaft 4 to pass through is integrally provided. At the same time, an annular groove 131 is provided on the inner wall of the circumferential side of the sleeve 13, and a positioning ring 42 is integrally provided on the circumferential side of the threaded shaft 4 and is embedded in the annular groove 131.
[0030] Refer to Figure 1 , Figure 3 , a rubber protection ring 111 for abutting against the second mounting head 21 is also adhesively fixed on the circumferential side of the first mounting head 11. Above the laser emitting device 1 and the receiving device 2, a corrugated folding curtain 5 with a "冂"-shaped cross-section is provided. Elastic buckles 51 are adhesively fixed at both ends of the corrugated folding curtain 5. Both elastic buckles 51 are "冂"-shaped and are respectively stuck at the positions of the first mounting head 11 and the second mounting head 21. An opening slot 52 for wires to pass through is provided in the middle of the corrugated folding curtain 5.
[0031] Principle: When it is necessary to adjust the distance between the laser emitting device 1 and the receiving device 2, the threaded shaft 4 is rotated by the knob 41. Since the threaded shaft 4 is circumferentially rotatably connected and axially fixedly connected in the guide hole 12, and the threaded shaft 4 is threadedly connected to the threaded hole 221 of one of the guide shafts 22, with the rotation of the threaded shaft 4, the guide shaft 22 can be driven to move in the guide hole 12, and then the guide shaft 22 can drive the receiving device 2 to move, so as to realize the stable adjustment of the distance between the laser emitting device 1 and the receiving device 2. At the same time, the threaded connection method is also beneficial to the stable locking and positioning of the positions of the laser emitting device 1 and the receiving device 2;
[0032] When no detection is required, the distance between the laser emitting device 1 and the receiving device 2 is shortened until the rubber protection ring 111 of the first mounting head 11 abuts against the second mounting head 21. At this time, the laser emitting device 1 and the receiving device 2 can be made to fit together, which is beneficial to protecting the lens positions of the laser emitting device 1 and the receiving device 2, and is also beneficial to dust-proof treatment of the lens positions of the laser emitting device 1 and the receiving device 2;
[0033] Meanwhile, when the wire to be tested passes between the laser emitting device 1 and the receiving device 2, the upper side of the wire can be wrapped and protected by the corrugated folding curtain 5, thereby reducing the possibility of dust falling into the surface of the wire during the detection process, which ultimately helps to improve the measurement accuracy; at the same time, since the corrugated folding curtain 5 can be extended and folded, it can be adapted to laser emitting devices 1 and receiving devices 2 with different spacing.
Claims
1. A laser diameter measuring instrument for improving measurement accuracy, comprising a laser emitting device (1), a receiving device (2), and a base (3) disposed below the laser emitting device (1), characterized in that: At one end of the laser emitting device (1) close to the receiving device (2), a first mounting head (11) is provided. At one end of the receiving device (2) close to the laser emitting device (1), a second mounting head (21) is provided. On both sides of the lower part of the second mounting head (21), guide shafts (22) are provided. Guide holes (12) for the guide shafts (22) to pass through are formed in both the laser emitting device (1) and the first mounting head (11). A threaded hole (221) is formed in the guide shaft (22) on one side. At one end of the laser emitting device (1) away from the receiving device (2), a threaded shaft (4) threadedly connected to the threaded hole (221) is provided. At one end of the threaded shaft (4) away from the guide shaft (22), a knob (41) is further provided. The threaded shaft (4) is circumferentially rotatably connected and axially fixedly connected in the guide hole (12). A rubber protection ring (111) for abutting against the second mounting head (21) is provided on the periphery of the first mounting head (11).
2. The laser diameter measuring instrument according to claim 1, which facilitates improved measurement accuracy, is characterized in that: At one end of the laser emitting device (1) away from the receiving device (2), a bushing (13) for the threaded shaft (4) to pass through is provided. An annular groove (131) is formed on the inner wall of the periphery of the bushing (13). A positioning ring (42) embedded in the annular groove (131) is provided on the periphery of the threaded shaft (4).
3. The laser diameter measuring instrument according to claim 1, which facilitates improved measurement accuracy, is characterized in that: Above the laser emitting device (1) and the receiving device (2), a corrugated folding curtain (5) with a "冂"-shaped cross-section is provided.
4. The laser diameter measuring instrument according to claim 3, which facilitates improved measurement accuracy, is characterized in that: At both ends of the corrugated folding curtain (5), elastic buckles (51) with a "冂"-shaped cross-section and respectively clamped at the positions of the first mounting head (11) and the second mounting head (21) are provided.
5. A laser diameter gauge according to claim 3, characterized in that: An opening slot (52) for a wire to pass through is formed in the middle of the corrugated folding curtain (5).
6. The laser diameter measuring instrument according to claim 1, which facilitates improved measurement accuracy, is characterized in that: At the lower end of the base (3), a circular seat plate (31) is provided. A plurality of damping spring shock absorbers (32) are provided on the periphery of the lower surface of the seat plate (31).
7. A laser diameter gauge according to claim 1, characterized in that: Scales are also marked on the outer wall of the side of the guide shaft (22).