A displacement metering verification device

Abstract

The utility model belongs to the field of calibrating device discloses a displacement measurement calibrating device, this scheme can make two drive blocks in control groove mutually close or far apart through motor drive two -way screw rotation, thereby control two drive board mutually close and far apart, through change two drive board's position can carry out the size of linear sensor adaptation clamping, and have the centering effect, make linear sensor keep in the middle part of mounting seat, and the physical abutment clamping also can not interfere with each part work in linear sensor inside, and the stability, reliability and applicability are stronger.

Description

Technical Field

[0001] This utility model belongs to the technical field of calibration devices, specifically relating to a displacement measurement calibration device. Background Technology

[0002] A draw-wire displacement sensor, also known as a draw-wire encoder or linear displacement sensor, can convert mechanical motion into electrical signals that can be measured, recorded, or transmitted. The draw-wire displacement sensor consists of a stretchable stainless steel rope wound around a threaded hub, which is connected to a precision rotary sensor. The sensor can be an incremental encoder, an absolute (independent) encoder, etc. Because it is directly used for displacement detection and measurement, it requires high detection accuracy. Therefore, it needs to be calibrated and verified regularly during use.

[0003] In related existing technologies, such as Chinese Patent No. CN222617838U, a fixture for measuring linear displacement sensors in a length measuring machine is disclosed. It includes a testing platform, a linear displacement magnetic fixing frame set on the upper surface of one side of the testing platform, a linear displacement sensor set on the upper surface of the linear displacement magnetic fixing frame, a "T"-shaped plug set on one side of the linear displacement magnetic fixing frame on the testing platform, a length measuring machine sensing strip set on the upper surface of the "T"-shaped plug, and a hook seat slidably connected to the "T"-shaped plug. This is used to solve the problem that when testing a large number of sensors, it is necessary to use a specially matched clamp to install and fix them one by one, which is inefficient.

[0004] However, in actual use, the linear displacement sensor and the magnetic fixing frame are fixed by magnetic attraction. However, a strong magnetic force will affect the normal operation of the magnetic components inside the linear displacement sensor, while a weak magnetic force will reduce the attraction to the outer shell of the linear displacement sensor. Furthermore, due to the distribution characteristics of magnetic field lines, the magnetic force in the horizontal direction is less. At the same time, the decrease in magnetic force will reduce the attraction to the metal, and the decrease in contact surface pressure will also lead to a decrease in friction. In this way, a weak magnetic force will cause the linear displacement sensor to easily move due to the pull of the wire during subsequent use. In other words, the magnetic fixing method is not conducive to practical use. Utility Model Content

[0005] The present invention aims to provide a displacement measurement and calibration device that can fix different types of linear displacement sensors without interfering with the normal operation of the linear displacement sensors.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a displacement measurement and verification device, comprising...

[0007] The mounting base has a control slot on the top.

[0008] The clamping mechanism includes a clamping motor, a bidirectional screw, a drive block, and a drive plate. The clamping motor is mounted on the side wall of the mounting base. The bidirectional screw is rotatably mounted in the control slot, and the end of the bidirectional screw is connected to the movable end of the clamping motor. Two drive blocks are threaded on the bidirectional screw. The drive blocks are slidably fitted with the control slot, and the top of the drive blocks is fixed with a drive plate.

[0009] Linear joint, mounted on the side wall of the mounting base;

[0010] A hook seat is provided on a linear joint. A mounting bracket is movably mounted on the hook seat. Hooks are provided on the side wall of the mounting bracket. Limit components are provided on the mounting bracket.

[0011] The length measuring device is mounted on the mounting base.

[0012] The principle and effects of this technical solution:

[0013] 1. By driving the bidirectional screw to rotate via a motor, the two drive blocks can be moved closer or further apart within the control slot, thereby controlling the two drive plates to move closer or further apart. By changing the position of the two drive plates, the size of the linear sensor can be adapted and clamped, and it has a centering effect, keeping the linear sensor in the center of the mounting base. The physical contact clamping will not interfere with the operation of the various components inside the linear sensor, resulting in stronger stability, reliability, and applicability.

[0014] 2. The linear coupling drives the hook seat to move, which in turn moves the mounting bracket and hook. The hook then pulls the traction end of the linear sensor, and the length measuring device measures the distance to the hook seat. This distance is then compared with the vertical measurement taken by the linear sensor to verify the accuracy of the linear sensor.

[0015] 3. Since the traction end heights of linear sensors of different models and sizes are different, by making the mounting bracket movably connected to the hook seat and limiting the mounting bracket through the limiting component, the height of the mounting bracket can be adjusted according to the height of the traction end of the linear sensor, thus adapting accordingly.

[0016] The present invention is further configured such that: the clamping mechanism includes a clamping plate, a connecting rod, a limiting head and a spring; the connecting rod is slidably inserted into the side wall of the drive plate; the limiting head and the clamping plate are respectively fixed at both ends of the connecting rod; the spring is sleeved on the connecting rod and located between the clamping plate and the drive plate.

[0017] The principle and effect of this technical solution: By connecting the clamping plate and the limiting head through the connecting rod, the clamping plate can move closer to and away from the drive plate through the connecting rod. The spring setting allows the spring force to drive the clamping plate to move away from the drive plate spontaneously. The limiting head setting prevents the connecting rod from detaching from the drive plate. Therefore, when clamping the linear sensor, the clamping plate abuts against the linear sensor, and the clamping plate can move closer to the drive plate relative to the drive plate by compressing the spring, rather than the drive plate directly abutting against the linear sensor. The transition setting of the spring avoids the linear sensor being damaged by direct rigid clamping.

[0018] The present invention is further configured as follows: the linear pair includes a linear motor, a linear screw, a slider, and a base frame. The base frame is fixed to the lower end of the side wall of the mounting base. The linear screw is rotatably installed inside the base frame. The linear motor is installed inside the mounting base. One end of the linear screw is connected to the movable end of the linear motor for transmission. The slider is threadedly fitted onto the linear screw, and the slider slides against the inner wall of the base frame. The hook seat is detachably installed on the slider.

[0019] The principle and effect of this technical solution: The sliding of the slider within the base frame restricts the rotation of the slider. Consequently, the threaded fit between the slider and the linear screw ensures that the rotation of the linear screw can only drive the slider to slide along the length of the linear screw, which in turn drives the hook seat to slide along the length of the linear screw. By using a linear motor to drive the linear screw, the hook seat can be moved closer to or away from the length measuring device.

[0020] The present invention is further configured such that: a connecting groove is provided on the base frame, a connecting bolt is inserted in the connecting groove, the cross-section of the slider is "T" shaped, the two ends of the slider abut against the top surface of the base frame, the hook seat abuts against the top surface of the slider, and the end of the connecting bolt passes through the slider and is threaded into the hook seat.

[0021] The principle and effect of this technical solution: By setting the connecting bolts, the hook seat can be disassembled relative to the slider, so that the hook seat can be replaced and maintained separately. When it is damaged, it can be replaced and maintained without replacing the whole thing, which reduces costs.

[0022] The present invention is further configured such that: a guide plate is fixed to the side wall of the mounting base, and the hook seat is slidably fitted onto the guide plate.

[0023] The principle and effect of this technical solution: By setting the guide plate, the sliding of the hook seat is guided, and in conjunction with the use of the linear pair, the hook seat can move stably along a straight line.

[0024] The present invention is further configured to include a limiting shaft, and a limiting bracket is inserted into the side of the base away from the mounting seat, and the limiting shaft is slidably inserted into the base and the limiting bracket.

[0025] The principle and effect of this technical solution: The setting of the limiting frame can limit the movement of the hook seat, preventing the hook seat from detaching from the guide plate. The base frame and the limiting frame are fixed by the common insertion of the limiting shaft. The fixing of the limiting frame and the base frame can be released by removing the limiting shaft, thereby completing the removal of the limiting frame. This allows the limiting frame to be disassembled and adjusted according to the usage.

[0026] The present invention is further configured such that: a limiting groove is provided on the side wall of the hook seat, the end of the mounting bracket is slidably inserted into the limiting groove, the limiting component is a limiting bolt, the limiting bolt is threadedly inserted into the side wall of the mounting bracket, and the end of the limiting bolt abuts against the side wall of the limiting groove.

[0027] The principle and effect of this technical solution: The mounting bracket can be stably raised and lowered relative to the hook seat by guiding the sliding of the mounting bracket through the limiting groove. The height position of the mounting bracket is limited by the friction force through the contact between the limiting bolt and the wall of the limiting groove. The traction force of the mounting bracket through the hook and the linear sensor is horizontal, which will not affect the stability of the mounting bracket in the vertical direction. The torque can be overcome by the contact between the mounting bracket and the limiting groove. Attached Figure Description

[0028] Figure 1 This is the front view of the present invention;

[0029] Figure 2 for Figure 1 Structural diagram showing the explosive separation of the clamping mechanism and the mounting base;

[0030] Figure 3 for Figure 2 Enlarged structural diagram of the clamping mechanism;

[0031] Figure 4 for Figure 2 Enlarged structural diagram of the central hook seat;

[0032] Figure 5 for Figure 2 Structure diagram of the straight line joint. Detailed Implementation

[0033] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments:

[0034] The reference numerals in the accompanying drawings include:

[0035] 110. Mounting base; 111. Control slot; 120. Guide plate;

[0036] 210. Clamping motor; 220. Bidirectional screw; 230. Drive block; 240. Drive plate; 250. Clamping plate; 260. Connecting rod; 270. Limiting head; 280. Spring;

[0037] 310. Length measuring device;

[0038] 410. Hook holder; 411. Limiting groove; 420. Mounting bracket; 430. Hook; 440. Limiting bolt;

[0039] 510 Linear screw; 520 Slider; 530 Base frame; 531 Connecting groove; 540 Connecting bolt; 550 Limiting shaft; 560 Limiting bracket.

[0040] Example:

[0041] As attached Figure 1-5 As shown, this utility model discloses a displacement measurement and verification device, including a mounting base 110, a clamping mechanism, a linear coupling, a hook seat 410, and a length measuring device 310. The length measuring device 310 is a laser rangefinder, installed inside the mounting base 110, with its detection end exposed to the outside. The laser rangefinder detects the distance between the hook seat 410 and the mounting base 110. A control groove 111 is provided on the top of the mounting base 110. The clamping mechanism is installed on the mounting base 110 and includes a clamping motor 210, a bidirectional screw 220, a drive block 230, a drive plate 240, a clamping plate 250, a connecting rod 260, a limiting head 270, and a spring 280. The clamping motor 210 is installed on the side wall of the mounting base 110, and the bidirectional screw 220 is rotatably installed in the control groove 111, with the end of the bidirectional screw 220 connected to the clamping motor 210. The active end of the 0 is connected by a transmission. Two drive blocks 230 are threadedly fitted on the bidirectional screw 220. The drive blocks 230 are slidably engaged with the control groove 111. A drive plate 240 is fixed to the top of the drive blocks 230. A connecting rod 260 is slidably inserted into the side wall of the drive plate 240. A limit head 270 and a clamping plate 250 are fixed to the two ends of the connecting rod 260, respectively. A spring 280 is sleeved on the connecting rod 260 and is located between the clamping plate 250 and the drive plate 240.

[0042] Among them, the pull rope sensor is usually a square box with the largest outer perimeter, so that the clamping plate 250 can abut against the outer wall of the square box to achieve a stable clamping and fixing effect.

[0043] The linear pair includes a linear motor, a linear screw 510, a slider 520, and a base frame 530. The base frame 530 is fixed to the lower end of the side wall of the mounting base 110. The linear screw 510 is rotatably mounted inside the base frame 530. The linear motor is mounted inside the mounting base 110. One end of the linear screw 510 is connected to the movable end of the linear motor. The slider 520 is threaded onto the linear screw 510, and the slider 520 slides against the inner wall of the base frame 530. A connecting groove 531 is provided on the base frame 530, and a connecting bolt 540 passes through the connecting groove 531. The slider 520 has a "T" shaped cross section. Both ends of the slider 520 abut against the top surface of the base frame 530. The hook seat 410 abuts against the top surface of the slider 520. The end of the connecting bolt 540 passes through the slider 520 and is threaded into the hook seat 410. The base frame 530 also has a countersunk groove at its bottom (not shown in the figure, used to accommodate the head of the connecting bolt 540 to prevent the head of the connecting bolt 540 from occupying external space). It also includes a limiting shaft 550, and a limiting bracket 560 is inserted into the side of the base frame 530 away from the mounting base 110. The limiting shaft 550 is slidably inserted into the base frame 530 and the limiting bracket 560.

[0044] Among them, the clamping motor 210 and the linear motor are both motors, which are common commercially available drive components and will not be described in detail here. The linear motor is not shown in the attached drawings of this scheme. Its main function is to drive the linear screw 510 to rotate. Its absence does not affect the understanding and implementation of the scheme.

[0045] The side wall of the hook seat 410 has a limiting groove 411. The end of the mounting bracket 420 is slidably inserted into the limiting groove 411. The mounting bracket 420 is provided with a limiting component, which is a limiting bolt 440. The limiting bolt 440 is threaded into the side wall of the mounting bracket 420, and the end of the limiting bolt 440 abuts against the side wall of the limiting groove 411. The side wall of the mounting base 110 is fixed with a guide plate 120. The hook seat 410 is slidably fitted onto the guide plate 120. The side wall of the mounting bracket 420 is also provided with a hook 430 for pulling the linear sensor.

[0046] The parts of the device not covered herein are the same as or can be implemented using existing technologies.

[0047] Among them, insert and sliding insert are mating bodies with holes, the cross section of the shaft or rod matches the hole, and the shaft or rod can slide relative to the hole. Threaded insert is a hole with threads, the shaft or rod is threaded, and the shaft or rod is connected to the mating body by screwing. Detachable installation can be by bolt thread connection or bolt and nut connection, etc., depending on what can be actually achieved.

[0048] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A displacement measurement and verification device, characterized in that: include The mounting base (110) has a control slot (111) on the top. The clamping mechanism includes a clamping motor (210), a bidirectional screw (220), a drive block (230), and a drive plate (240). The clamping motor (210) is mounted on the side wall of the mounting base (110). The bidirectional screw (220) is rotatably mounted in the control groove (111), and the end of the bidirectional screw (220) is connected to the movable end of the clamping motor (210). Two drive blocks (230) are threaded on the bidirectional screw (220). The drive blocks (230) are slidably engaged with the control groove (111), and the top of the drive blocks (230) is fixed with the drive plate (240). A linear pair is mounted on the side wall of the mounting base (110); A hook seat (410) is provided on a linear pair. A mounting bracket (420) is movably mounted on the hook seat (410). A hook (430) is provided on the side wall of the mounting bracket (420). A limit component is provided on the mounting bracket (420). The length measuring device (310) is mounted on the mounting base (110).

2. The displacement measurement and verification device as described in claim 1, characterized in that: The clamping mechanism further includes a clamping plate (250), a connecting rod (260), a limiting head (270), and a spring (280). The connecting rod (260) is slidably inserted into the side wall of the drive plate (240). The limiting head (270) and the clamping plate (250) are fixed at both ends of the connecting rod (260), respectively. The spring (280) is sleeved on the connecting rod (260) and located between the clamping plate (250) and the drive plate (240).

3. The displacement measurement and verification device as described in claim 1, characterized in that: The linear pair includes a linear motor, a linear screw (510), a slider (520), and a base frame (530). The base frame (530) is fixed to the lower end of the side wall of the mounting base (110). The linear screw (510) is rotatably mounted inside the base frame (530). The linear motor is mounted inside the mounting base (110). One end of the linear screw (510) is connected to the movable end of the linear motor. The slider (520) is threaded onto the linear screw (510), and the slider (520) slides against the inner wall of the base frame (530). The hook seat (410) is detachably mounted on the slider (520).

4. The displacement measurement and verification device as described in claim 3, characterized in that: The base frame (530) has a connecting groove (531) and a connecting bolt (540) passes through the connecting groove (531). The slider (520) has a "T" shaped cross section. The two ends of the slider (520) abut against the top surface of the base frame (530). The hook seat (410) abuts against the top surface of the slider (520). The end of the connecting bolt (540) passes through the slider (520) and is threaded into the hook seat (410).

5. The displacement measurement and verification device as described in claim 4, characterized in that: The side wall of the mounting base (110) is fixed with a guide plate (120), and the hook seat (410) is slidably fitted onto the guide plate (120).

6. The displacement measurement and verification device as described in claim 5, characterized in that: It also includes a limiting shaft (550), and a limiting bracket (560) is inserted into the side of the base frame (530) away from the mounting base (110). The limiting shaft (550) is slidably inserted into the base frame (530) and the limiting bracket (560).

7. The displacement measurement and verification device as described in claim 1, characterized in that: The side wall of the hook seat (410) is provided with a limiting groove (411), the end of the mounting bracket (420) is slidably inserted into the limiting groove (411), the limiting component is a limiting bolt (440), the side wall of the mounting bracket (420) is threaded with a limiting bolt (440), and the end of the limiting bolt (440) abuts against the side wall of the limiting groove (411).

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