A contact type telescopic guiding and positioning anti-collision protection system and measuring platform

Abstract

The application provides a contact type telescopic guiding and positioning anti-collision protection system, which comprises a guiding sleeve, a dense bead sliding sleeve, a sliding shaft, a spring, a baffle, a contact type sensing assembly, a movable contact, a fixed ring and an optical lens, the dense bead sliding sleeve is installed on the inner side surface of the guiding sleeve, the sliding shaft passes through the dense bead sliding sleeve and is connected with the fixed ring, the optical lens is installed on the fixed ring, the baffle is connected with the guiding sleeve, the spring is clamped between the baffle and the sliding shaft, the movable contact is clamped between the sliding shaft and the fixed ring, and the contact type sensing assembly is fixed on the guiding sleeve.The application has the beneficial effects that: the contact type anti-collision protection is adopted, a reflection receiving device is not needed, the distance from the protected device to the sample is not required, the universality is wide, triggering is sensitive, contact can cut off power supply protection, the environment is not required, and the cost is low, and the mechanical structure is very safe and reliable.

Description

TECHNICAL FIELD

[0001] The present application relates to a measuring instrument, in particular to a contact type telescopic guiding and positioning anti-collision protection system and a measuring platform. BACKGROUND

[0002] Anti-collision systems are commonly used in the fields of precision measurement and optics. At present, the anti-collision protection systems applied in the field of precision optical measurement mainly have the following schemes:

[0003] 1. Pulse laser ranging: the laser signal is emitted to the target, and is reflected back when it hits the target. The distance to be positioned is calculated by the round-trip time of the received light signal.

[0004] 2. Continuous wave phase laser ranging: the measured target is irradiated with a continuously modulated laser wave, and the distance of the measured target is calculated from the phase change caused by the round-trip of the measurement light speed. In order to ensure the measurement accuracy, a laser reflector needs to be installed on the measured target.

[0005] 3. Ultrasonic ranging: the actual distance from the emission point to the sample is calculated according to the time difference between the emission and reception, by using the known propagation speed of ultrasonic waves in the air.

[0006] The defects of the above existing schemes are as follows:

[0007] 1) In practice, it is found that the laser ranging has a large ranging error and inaccurate positioning due to the light diffuse reflection problem, different reflectivity of different material sample surfaces, etc., resulting in collision and damage to the protected components.

[0008] 2) In practice, it is found that the laser ranging device has a high manufacturing difficulty and cost, and the optical system needs to be kept clean, which has a high requirement on the environment.

[0009] 3) The ultrasonic ranging has low accuracy and high cost, and has a blind area of tens of millimeters in the minimum detection area, which cannot protect optical devices with small working distance.

[0010] 4) The current non-contact ranging is difficult to meet the positioning and measurement of some small, low reflectivity, high and sharp sample surfaces.

[0011] Therefore, how to provide an anti-collision system which is not easy to damage, has low cost, low requirement on the environment and wide application range is a technical problem to be solved by those skilled in the art. SUMMARY

[0012] In order to solve the problems in the prior art, the present application provides a contact type telescopic guiding and positioning anti-collision protection system and a measuring platform.

[0013] The application provides a contact type telescopic guiding positioning anti-collision protection system, which comprises a guiding sleeve, a dense bead sliding sleeve, a sliding shaft, a spring, a baffle, a contact type sensing assembly, a movable contact, a fixed ring and an optical lens, the dense bead sliding sleeve is arranged on the inner side of the guiding sleeve, the sliding shaft passes through the dense bead sliding sleeve and is connected with the fixed ring, the sliding shaft and the dense bead sliding sleeve are in rolling friction, the optical lens is arranged on the fixed ring, the baffle is connected with the guiding sleeve, the spring is arranged between the baffle and the sliding shaft, the spring functions as a reset, the movable contact is arranged between the sliding shaft and the fixed ring, and the contact type sensing assembly is fixed on the guiding sleeve, when the anti-collision protection system moves in a positive direction and contacts with the surface of a sample, the movable contact and the sliding shaft move in a reverse direction synchronously until the movable contact contacts with the contact type sensing assembly, so that a contact signal is triggered.

[0014] As a further improvement of the application, the head of the sliding shaft passes through the dense bead sliding sleeve and is threadedly connected with the tail of the fixed ring, a taper positioning structure is arranged between the tail of the sliding shaft and the tail of the guiding sleeve, the baffle is fixed on the tail of the guiding sleeve, and the spring is arranged between the baffle and the tail of the sliding shaft.

[0015] As a further improvement of the application, the optical lens is threadedly connected with the head of the fixed ring, and the movable contact is arranged between the head of the sliding shaft and the tail of the fixed ring.

[0016] As a further improvement of the application, the tail of the sliding shaft is provided with a taper positioning protrusion, and the tail of the guiding sleeve is provided with a taper positioning chamfer matched with the taper positioning protrusion.

[0017] As a further improvement of the application, the contact type sensing assembly comprises a trigger circuit board and a contact probe arranged on the trigger circuit board, and the movable contact is provided with a contact protrusion matched with the contact probe.

[0018] As a further improvement of the application, the movable contact is provided with an anti-rotation protrusion, the guiding sleeve is provided with an anti-rotation groove, and the anti-rotation protrusion is arranged in the anti-rotation groove.

[0019] The application further provides a measuring platform comprising the contact type telescopic guiding positioning anti-collision protection system according to any one of the above.

[0020] As a further improvement of the present application, the measuring platform further comprises a driving system, the driving system comprising a driving part, an executing part and a control part, the control part being connected with the driving part, the driving part being connected with the executing part, the executing part being connected with the guide sleeve or the baffle, and the control part being connected with the contact sensing assembly.

[0021] The present application has the advantages that: by the above scheme, contact type anti-collision protection is adopted, no reflection receiving device is needed, the distance from the protected device to the sample has no requirement, the universality is wide, the triggering is sensitive, the contact can cut off the power supply, the environment has no requirement, and the cost is low, and since it is a mechanical structure, it is very safe and reliable, and is not easy to be damaged. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is an exploded view of the contact type telescopic guide positioning anti-collision protection system of the present application.

[0023] Figure 2 is a cross-sectional view of the contact type telescopic guide positioning anti-collision protection system of the present application.

[0024] Figure 3 is an assembly view of the contact type telescopic guide positioning anti-collision protection system of the present application. DETAILED DESCRIPTION

[0025] The present application will be further described below in conjunction with the description of the drawings and the specific implementation.

[0026] As shown in Figures 1 to 3 to solve the problems that the objective lens or important measuring head device in the current optical equipment measuring head is damaged due to collision, the present application provides a contact type telescopic guide positioning anti-collision protection system, which comprises a guide sleeve 1, a dense bead sliding sleeve 2, a sliding shaft 3, a spring 4, a baffle 5, a contact sensing assembly, a movable contact 8, a fixed ring 10 and an optical lens 11, the dense bead sliding sleeve 2 is installed on the inner side surface of the guide sleeve 1, the sliding shaft 3 passes through the dense bead sliding sleeve 2 and is connected with the fixed ring 10, the sliding shaft 3 and the dense bead sliding sleeve 2 are in rolling friction, the optical lens 11 is installed on the fixed ring 10, the baffle 5 is connected with the guide sleeve 1, the spring 4 is clamped between the baffle 5 and the sliding shaft 3, the spring 4 plays a resetting role, the movable contact 8 is clamped between the sliding shaft 3 and the fixed ring 10, and the contact sensing assembly is fixed on the guide sleeve 1, when the anti-collision protection system moves in the positive direction and contacts the sample surface, the movable contact 8 and the sliding shaft 3 move in the reverse direction synchronously until the movable contact 8 contacts the contact sensing assembly, so as to trigger a contact signal.

[0027] As shown in Figures 1 to 3As shown in the figure, the head of the sliding shaft 3 passes through the dense bead sliding sleeve 2 and is threadedly connected with the tail of the fixed ring 10, a taper positioning structure is arranged between the tail of the sliding shaft 3 and the tail of the guide sleeve 1, the baffle 5 is fixed on the tail of the guide sleeve 1, and the spring 4 is clamped between the baffle 5 and the tail of the sliding shaft 3.

[0028] As shown in the figure, Figures 1 to 3 the optical lens 11 is threadedly connected with the head of the fixed ring 10, and the movable contact 8 is clamped between the head of the sliding shaft 3 and the tail of the fixed ring 10.

[0029] As shown in the figure, Figures 1 to 3 the tail of the sliding shaft 3 is provided with a taper positioning protrusion 31, and the tail of the guide sleeve 1 is provided with a taper positioning chamfer 12 matched with the taper positioning protrusion 31.

[0030] As shown in the figure, Figures 1 to 3 the contact sensing assembly comprises a trigger circuit board 7 and a contact probe 71 arranged on the trigger circuit board 7, and the movable contact 8 is provided with a contact protrusion 82 matched with the contact probe 71.

[0031] As shown in the figure, Figures 1 to 3 the movable contact 8 is provided with an anti-rotation protrusion 81, the guide sleeve 1 is provided with an anti-rotation groove 11, and the anti-rotation protrusion 81 is arranged in the anti-rotation groove 11.

[0032] The contact type telescopic guide positioning anti-collision protection system provided by the application has the following assembly process:

[0033] First, the dense bead sliding sleeve 2 is assembled on the guide sleeve 1;

[0034] Secondly, the sliding shaft 3 passes through the dense bead sliding sleeve 2, so that the sliding shaft 3 is pulled out of the guide sleeve 1;

[0035] Thirdly, the movable contact 8 is sleeved on the sliding shaft 3, and the movable contact 8 is clamped by rotating the sliding shaft 3 upwards through the thread of the fixed ring 10, so that the anti-rotation protrusion 81 of the movable contact 8 is matched with the anti-rotation groove 11 of the guide sleeve 1 (see Figure 1 );

[0036] Fourthly, the trigger circuit board 7 is fixed on the guide sleeve 1 through the trigger circuit board fixing screw 9 (see Figure 3 ), so that the distance between the contact probe 71 on the trigger circuit board 7 and the movable contact 8 is about 0.5mm;

[0037] Fifthly, the spring 4 is assembled on the sliding shaft 3 (see Figure 2 ), and the baffle 5 is covered and locked through the fixing screw 6 (see Figure 3 ).

[0038] Finally, the optical lens 11 is screwed onto the fixed ring 10 (see Figure 2 ).

[0039] The present application also provides a measurement platform comprising the contact type telescopic guiding positioning anti-collision protection system according to any one of the preceding claims.

[0040] The measurement platform further comprises a driving system, the driving system comprising a driving part, an executing part and a control part, the control part being connected with the driving part, the driving part being connected with the executing part, the executing part being connected with the guiding sleeve or the baffle, and the control part being connected with the contact type sensing assembly.

[0041] The contact type telescopic guiding positioning anti-collision protection system provided by the present application has the following working principle:

[0042] Since the sliding shaft 3, the movable contact 8, the fixed ring 10 and the optical lens 11 are connected as a whole, when the optical lens 11 moves downward and contacts the sample surface, it moves upward slightly due to the reaction force, thereby driving the movable contact 8 to move upward and contact the trigger circuit board 7, the trigger circuit board 7 sends a signal to the driving system to stop the downward movement of the optical lens 11, thereby achieving the protection effect. By means of the external driving force, the optical lens 11 is moved away from the sample, the spring 4 is reversely elongated, the dense bead sliding sleeve 2 is guided, and the sliding shaft 3 is pushed, so that the movable contact 8 is separated from the trigger circuit board 7. Since the guiding sleeve 1 and the sliding shaft 3 are matched by means of a taper surface, the optical lens 11 is reset to the original position, thereby achieving the positioning effect.

[0043] The contact type telescopic guiding positioning anti-collision protection system provided by the present application has the following characteristics: it is not affected by the shape and size of the sample, the collision force can be adjusted by the spring force, the important devices can be telescopic and buffered after contact, the collision can trigger a signal to cut off the power supply for protection, and it is easy to design and integrate with the protected device. The structure is simple, the device is integrated and miniaturized, the reliability is strong, and the cost is greatly reduced.

[0044] The contact type telescopic guiding positioning anti-collision protection system and the measurement platform provided by the present application have the following improvements:

[0045] 1) The dense bead guiding telescopic movement mode is adopted, the dense bead sliding sleeve 2 is arranged between the guiding sleeve 1 and the sliding shaft 3 for guiding, so that the traditional dry friction is changed into rolling friction, the sliding shaft 3 is driven to move when the optical lens 11 moves upward and downward, and the sliding shaft 3 is reset by the compression force (or the stretching force) of the spring 4 (see Figure 2 ), thereby solving the problems of wear and increased friction caused by dry friction, and the anti-collision failure;

[0046] 2) taper positioning mode (see Figure 2 ), when the guide sleeve 1 and the sliding shaft 3 move relative to each other, the positioning problem after the collision of the equipment is solved by the taper guide positioning of each other when returning to the original position;

[0047] 3) anti-rotation mechanical structure mode (see Figure 1 ), when the fixed ring 10 and the sliding shaft 3 are screwed upwards, the movable contact 8 is clamped, and the boss of the movable contact 8 is matched with the recess of the guide sleeve 1, so that the optical lens 11, the fixed ring 10 and the sliding shaft 3 are connected into a structure (see Figure 2 ) and cannot rotate, solving the rotation problem of the positioning shaft;

[0048] 4) mechanical and electronic combined triggering power-off mode (see Figure 2 ), when the movable contact 8 moves upwards and contacts the trigger circuit board 7, the trigger circuit board 7 sends a signal to the driving system, so that the optical lens 11 stops moving downwards or the entire system (equipment) is powered off, playing an emergency stop protection role.

[0049] The contact type telescopic guide positioning anti-collision protection system and the measuring platform provided by the application have the following advantages:

[0050] 1) The contact type anti-collision protection mode is adopted, no reflection receiving device is needed, the distance from the protected device to the sample has no requirement, and the universality is wide.

[0051] 2) The triggering is sensitive, the power is cut off after contact, there is no requirement for the environment, and the cost is low. Since it is a mechanical structure, it is very safe and reliable.

[0052] 3) Regardless of the size, height, and reflectivity of the sample, the anti-collision protection can be very sensitive.

[0053] 4) According to the contact type anti-collision design principle, the protection structure can be well designed to make the equipment beautiful and improve the economic value.

[0054] The contact type telescopic guide positioning anti-collision protection system provided by the application can be used in some industrial detection instruments and high-precision platforms, such as image microscopic measurement probes, high-power objectives, interference objectives, nanometer probes, and nanometer displacement tables.

[0055] The above content is a further detailed description of the application in combination with a specific preferred embodiment, and cannot be regarded as a limitation of the specific implementation of the application. For ordinary skilled persons in the technical field to which the application belongs, some simple deductions or substitutions can be made without departing from the concept of the application, and all of them should be regarded as falling within the protection scope of the application.

Claims

1. A contact type telescopic guiding and positioning anti-collision protection system, characterized in that: The anti-collision protection system comprises a guide sleeve, a sealing sliding sleeve, a sliding shaft, a spring, a baffle, a contact sensing assembly, a movable contact, a fixed ring and an optical lens, the sealing sliding sleeve is installed on the inner side of the guide sleeve, the sliding shaft passes through the sealing sliding sleeve and is connected with the fixed ring, the sliding shaft and the sealing sliding sleeve are in rolling friction, the optical lens is installed on the fixed ring, the baffle is connected with the guide sleeve, the spring is clamped between the baffle and the sliding shaft, the spring functions as a reset, the movable contact is clamped between the sliding shaft and the fixed ring, and the contact sensing assembly is fixed on the guide sleeve, when the anti-collision protection system moves in a positive direction and contacts with the surface of a sample, the movable contact and the sliding shaft move in a reverse direction synchronously until the movable contact contacts with the contact sensing assembly, so as to trigger a contact signal, The head of the sliding shaft passes through the sealing sliding sleeve and is threadedly connected with the tail of the fixed ring, the taper positioning structure is arranged between the tail of the sliding shaft and the tail of the guide sleeve, the optical lens is threadedly connected with the head of the fixed ring, the anti-rotation protrusion is arranged on the movable contact, the anti-rotation groove matched with the anti-rotation protrusion is arranged on the guide sleeve, when the movable contact is clamped, the anti-rotation protrusion matches with the anti-rotation groove, so that the optical lens, the fixed ring and the sliding shaft are integrated and cannot rotate, the hollow structure is arranged at the position of the central axis of the anti-collision protection system between the head of the baffle and the tail of the fixed ring, and the contact sensing assembly is fixed on the outer side of the guide sleeve.

2. The contact type telescopic guiding and positioning anti-collision protection system according to claim 1, characterized in that: The baffle is fixed on the tail of the guide sleeve, and the spring is clamped between the baffle and the tail of the sliding shaft.

3. The contact type telescopic guiding and positioning anti-collision protection system according to claim 1, characterized in that: The movable contact is clamped between the head of the sliding shaft and the tail of the fixed ring.

4. The contact type telescoping guided positioning anti-collision protection system according to claim 1, characterized in that: The tail of the sliding shaft is provided with a taper positioning protrusion, and the tail of the guide sleeve is provided with a taper positioning chamfer matched with the taper positioning protrusion.

5. The contact type telescoping guided positioning anti-collision protection system according to claim 1, characterized in that: The contact sensing assembly comprises a trigger circuit board and a contact probe arranged on the trigger circuit board, and the movable contact is provided with a contact protrusion matched with the contact probe.

6. The contact type telescoping guided positioning anti-collision protection system according to claim 1, characterized in that: The anti-rotation protrusion is arranged in the anti-rotation groove.

7. A measurement platform characterized by: The anti-collision protection system comprises the contact type telescopic guide positioning system according to any one of claims 1 to 6.

8. The measurement platform of claim 7, wherein: The measurement platform further comprises a driving system, the driving system comprises a driving part, an execution part and a control part, the control part is connected with the driving part, the driving part is connected with the execution part, the execution part is connected with the guide sleeve or the baffle, and the control part is connected with the contact sensing assembly.

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