Explosion-proof speed measurement sensor

Abstract

The utility model discloses an explosion-proof speed measurement sensor which comprises a mounting seat, a speed measurement sensor body is fixedly mounted on the upper surface of one end of the mounting seat, one end of a rotating shaft of the speed measurement sensor body is fixedly connected with a connector, and a shaft body to be measured is arranged on one side, connected with the connector, of the speed measurement sensor body. A transmission mechanism is arranged on the mounting base, and the speed measurement sensor is prevented from being damaged in a self-disconnection mode when the rotating speed exceeds the limit. According to the explosion-proof speed measurement sensor, the speed measurement sensor main body is in non-fixed connection with the to-be-measured shaft body, so that the speed measurement sensor main body can be actively separated from the to-be-measured shaft body when the rotating speed of the to-be-measured shaft body is too high, and components in the speed measurement sensor main body are prevented from being damaged in the use process; the clamping rod is adopted to clamp the shaft body to be measured, so that the clamping rod can stably clamp the shaft bodies to be measured with different diameters through sliding, and the application range of the speed measurement sensor is expanded.

Description

Technical Field

[0001] The utility model relates to the technical field of speed measurement sensors, in particular to an explosion-proof speed measurement sensor. Background Art

[0002] The working principle of a rotational speed sensor is mainly based on converting the rotational speed of a rotating object into an electrical quantity output, which can be achieved through various methods, including mechanical, electrical, magnetic, optical, and hybrid types, etc. Rotational speed sensors can be divided into analog and digital types. Among them, digital rotational speed sensors usually use code disk technology to directly convert the rotational speed of the rotating shaft into a digital quantity. Magnetosensitive rotational speed sensors use magnetosensitive resistors as sensing elements to output pulse signals by detecting the rotation of magnetic or magnetically conductive materials, thereby achieving the purpose of speed measurement or displacement detection. Laser and magnetoelectric rotational speed sensors measure rotational speed using the principles of laser and electromagnetic induction. Among them, magnetoelectric sensors use components such as iron cores, permanent magnets, and induction coils to generate electromotive force through the rotation of gears on a rotating object, and the magnitude of the output voltage is proportional to the rotational speed of the measured object. Capacitive and variable reluctance rotational speed sensors detect rotational speed using the principles of capacitance and variable reluctance respectively. The interaction between Hall elements and magnetic fields is also used for rotational speed sensing, and the magnetic field change is sensed by the Hall element and converted into a voltage signal for measurement. There are also rotational speed sensors using the principle of eddy current, and optoelectronic rotational speed sensors based on the photoelectric effect. The latter consists of a signal generator and a signal disk with slotted light holes, and measures rotational speed through the photoelectric effect. Generally speaking, rotational speed sensors have a wide variety of types and different working principles, but the common point is that they can all convert the rotational speed of a rotating object into an electrical quantity or other forms of output for easy measurement and control. However, the same is that no matter what kind of speed measurement sensor, there is a maximum measurement speed. Once the maximum designed speed measurement is exceeded, measurement cannot be carried out, and the vibration generated by speed overlimit and the hard connection between the sensor and the shaft to be measured are likely to cause the explosion and damage of internal components of the speed measurement sensor, which is not conducive to extending the service life of the sensor. Content of the Utility Model

[0003] The purpose of the utility model is to provide an explosion-proof speed measurement sensor to solve the problem of damage to the rotational speed sensor caused by over-speed rotation in the above-mentioned background art.

[0004] To achieve the above purpose, the utility model provides the following technical solution: an explosion-proof speed measurement sensor, including a mounting base, the upper surface of one end of the mounting base is fixedly installed with a speed measurement sensor main body, and one end of the rotating shaft of the speed measurement sensor main body is fixedly connected with a connector. A shaft body to be measured is arranged on one side of the speed measurement sensor main body where the connector is connected. A transmission mechanism is arranged on the upper surface of the mounting base, and the speed measurement sensor is prevented from being damaged by self-disconnection when the speed exceeds the limit.

[0005] Preferably, the transmission mechanism includes: a mounting bracket fixedly arranged on the upper surface of one end of the mounting base facing the shaft body to be measured. A rotating central disk is mounted on the inner surface of the mounting bracket. A connecting cylinder is fixedly arranged at one end of the central disk facing the speed measurement sensor body. A connecting block is slidably mounted at one end of the connecting cylinder facing the speed measurement sensor body. The outer surface of the central disk is penetrated by an adjusting rod. One end of the adjusting rod facing the shaft body to be measured is rotatably connected to a sliding disk. Clamping rods are slidably mounted on the outer surface of the sliding disk. An extrusion ring is slidably mounted on the outer surface of the sliding disk. A supporting bracket is fixedly arranged on the upper surface of the mounting base.

[0006] With the above technical solution, the central disk and the connecting cylinder can rotate stably above the mounting base.

[0007] Preferably, the outer surface of the connecting cylinder is in contact with the inner surface of the supporting bracket. The inner surface of the supporting bracket is designed to be arc-shaped. A spring is connected between the connecting cylinder and the connecting block. The connecting block is snap-fitted with the connecting head.

[0008] With the above technical solution, the connecting cylinder can drive the rotating shaft of the speed measurement sensor body to rotate.

[0009] Preferably, the adjusting rod is threadedly connected to the central disk. The central disk is fixedly connected to the extrusion ring. A spring is connected between the sliding disk and the clamping rod. One end of the clamping rod is designed to be arc-shaped. The inner surface of the arc-shaped end of the clamping rod is in contact with the outer surface of the shaft body to be measured. The middle section of the clamping rod is designed to be inclined towards the axis of the shaft body to be measured. The inclined surface of the middle section of the clamping rod is in contact with the inner surface of the extrusion ring. One end of the extrusion ring is designed to be arc-shaped.

[0010] With the above technical solution, the extrusion ring can drive the clamping rod to slide and clamp the shaft body to be measured by squeezing the inclined surface of the clamping rod.

[0011] Preferably, the outer surface of the connecting block is penetrated by a limiting block. One end of the connecting head snap-fitted with the connecting block is designed to be cross-shaped. A clamping groove is formed on the side surface of one end of the connecting head snap-fitted with the connecting block.

[0012] With the above technical solution, the connecting block can drive the connecting head to rotate stably.

[0013] Preferably, the limiting block is slidably connected to the connecting block. A spring is connected between the limiting block and the connecting block. The lower end of the limiting block is designed to be a right trapezoid. The inclined surface of the lower end of the limiting block faces the speed measurement sensor body.

[0014] With the above technical solution, the limiting block can let the connecting head pass when the inclined surface is pressed.

[0015] Preferably, the card slot is snap-fitted with the limit block, and the inner surface of the card slot is in contact with the right-angled side at the lower end of the limit block.

[0016] With the above technical solution, the limit block can be stably snap-fitted with the connector through the card slot.

[0017] Compared with the prior art, the beneficial effects of the present utility model are as follows: This explosion-proof speed measurement sensor:

[0018] 1. By adopting the method of non-fixed connection between the speed measurement sensor main body and the shaft body to be measured, the speed measurement sensor main body can actively disconnect from the shaft body to be measured when the rotation speed of the shaft body to be measured is too high, avoiding damage to the components inside the speed measurement sensor main body during use;

[0019] 2. Further, by adopting the method of clamping the shaft body to be measured with the clamping rod, the clamping rod can stably clamp shaft bodies to be measured with different diameters through sliding, expanding the applicable range of the speed measurement sensor. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic three-dimensional structure diagram of the whole of the present utility model;

[0021] Figure 2 is a schematic side view structure diagram of the whole of the present utility model;

[0022] Figure 3 is a schematic top view structure diagram of the whole of the present utility model;

[0023] Figure 4 is a schematic three-dimensional structure diagram of the connection between the connector and the connection block of the present utility model;

[0024] Figure 5 is a schematic three-dimensional structure diagram of the cross-section of the connection between the sliding disk and the clamping rod of the present utility model;

[0025] Figure 6 is a schematic three-dimensional structure diagram of the connection between the sliding disk and the clamping rod of the present utility model;

[0026] Figure 7 is a schematic three-dimensional structure diagram of the cross-section of the connection between the connector and the connection block of the present utility model;

[0027] Figure 8 is a schematic three-dimensional structure diagram of the cross-section of the connection between the connection block and the limit block of the present utility model.

[0028] In the figure: 1, mounting base; 2, speed measurement sensor main body; 3, connector; 4, shaft body to be measured; 5, mounting frame; 6, center disk; 7, connecting cylinder; 8, connection block; 9, adjusting rod; 10, sliding disk; 11, clamping rod; 12, pressing ring; 13, supporting bracket; 14, limit block; 15, card slot. DETAILED DESCRIPTION OF THE INVENTION

[0029] The following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without making creative efforts shall fall within the protection scope of the present utility model.

[0030] Please refer to Figure 1-8 , the present utility model provides a technical solution: an explosion-proof speed measurement sensor.

[0031] Embodiment 1

[0032] In this embodiment, it is disclosed that: a mounting seat 1, the upper surface of one end of the mounting seat 1 is fixedly installed with a speed measurement sensor main body 2, and one end of the rotating shaft of the speed measurement sensor main body 2 is fixedly connected with a connecting head 3. A to-be-measured shaft body 4 is arranged on one side of the speed measurement sensor main body 2 where the connecting head 3 is connected. A transmission mechanism is arranged on the upper surface of the mounting seat 1, and the speed measurement sensor is prevented from being damaged by automatically disconnecting when the rotation speed exceeds the limit;

[0033] The transmission mechanism includes: a mounting frame 5, the mounting frame 5 is fixedly arranged on the upper surface of one end of the mounting seat 1 facing the to-be-measured shaft body 4. A rotating central disk 6 is installed on the inner surface of the mounting frame 5. One end of the central disk 6 facing the speed measurement sensor main body 2 is fixedly provided with a connecting cylinder 7. One end of the connecting cylinder 7 facing the speed measurement sensor main body 2 is slidably installed with a connecting block 8. The outer surface of the central disk 6 is penetrated by an adjusting rod 9. One end of the adjusting rod 9 facing the to-be-measured shaft body 4 is rotatably connected with a sliding disk 10. And a sliding clamping rod 11 is installed on the outer surface of the sliding disk 10. A sliding extrusion ring 12 is installed on the outer surface of the sliding disk 10. A supporting bracket 13 is fixedly arranged on the upper surface of the mounting seat 1;

[0034] The outer surface of the connecting cylinder 7 is in fit with the inner surface of the supporting bracket 13, and the inner surface of the supporting bracket 13 is designed in an arc shape. A spring is connected between the connecting cylinder 7 and the connecting block 8, and the connecting block 8 is snap-fitted with the connecting head 3;

[0035] The adjusting rod 9 is threadedly connected with the central disk 6, and the central disk 6 is fixedly connected with the extrusion ring 12. A spring is connected between the sliding disk 10 and the clamping rod 11. One end of the clamping rod 11 is designed in an arc shape, and the inner surface of the arc-shaped end of the clamping rod 11 is in fit with the outer surface of the to-be-measured shaft body 4. The middle section of the clamping rod 11 is designed to be inclined towards the axis of the to-be-measured shaft body 4, and the inclined surface of the middle section of the clamping rod 11 is in fit with the inner surface of the extrusion ring 12. And one end of the extrusion ring 12 is designed in an arc shape;

[0036] During use, hold the central disk 6 and rotate the adjusting rod 9. At this time, the adjusting rod 9 drives the sliding disk 10 to slide horizontally relative to the central disk 6 through the threaded connection with the central disk 6. At this time, as the sliding disk 10 slides, the middle inclined surface of the clamping rod 11 is gradually squeezed by the inner surface of the pressing ring 12, so that the clamping rod 11 slides relative to the sliding disk 10 until the arc-shaped end of the clamping rod 11 clamps the shaft body 4 to be measured. At this time, when the shaft body 4 to be measured rotates, the central disk 6 drives the connecting cylinder 7 to rotate inside the supporting bracket 13 under the support of the mounting bracket 5. At this time, the connecting cylinder 7 drives the rotating shaft of the speed measuring sensor main body 2 installed on the mounting seat 1 to rotate through the engagement of the connecting block 8 and the connecting head 3, so as to measure the rotation speed of the shaft body 4 to be measured.

[0037] Embodiment 2

[0038] This embodiment discloses on the basis of Embodiment 1: The outer surface of the connecting block 8 is penetrated by the limiting block 14. One end of the connecting head 3 engaged with the connecting block 8 is designed in a cross shape, and a clamping groove 15 is provided on the side surface of one end of the connecting head 3 engaged with the connecting block 8;

[0039] The limiting block 14 is slidably connected to the connecting block 8, and a spring is connected between the limiting block 14 and the connecting block 8. The lower end of the limiting block 14 is designed in a right-angled trapezoid shape, and the inclined surface at the lower end of the limiting block 14 faces the speed measuring sensor main body 2;

[0040] The clamping groove 15 is engaged with the limiting block 14, and the inner surface of the clamping groove 15 is attached to the right-angled side at the lower end of the limiting block 14;

[0041] When the rotation speed of the shaft body 4 to be measured exceeds the maximum rotation speed that the speed measuring sensor main body 2 can measure during the rotation process, due to the action of the release force, the limiting block 14 stretches the spring between it and the connecting block 8 and slides to release the engagement with the clamping groove 15. At this time, the connecting block 8 loses its limit and slides away from the engagement with the connecting head 3 under the pulling of the spring between it and the connecting cylinder 7, so as to avoid damage to the speed measuring sensor main body 2 caused by the over-speed rotation of the connecting head 3. When the speed measuring sensor main body 2 has different rotation speed upper limits, it can be adjusted by replacing the spring between the limiting block 14 and the connecting block 8.

[0042] Although the embodiments of the present invention have been shown and described, for those of ordinary skill in the art, it can be understood that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principle and spirit of the present invention. The scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. An explosion-proof speed sensor, comprising a mounting seat (1), a speed sensor body (2) being fixedly mounted on an upper surface of one end of the mounting seat (1), and a connector (3) being fixedly connected to one end of a rotating shaft of the speed sensor body (2), and a shaft body (4) to be measured being arranged on one side of the speed sensor body (2) connected to the connector (3), characterized in that: A transmission mechanism is arranged on the mounting seat (1), which prevents the speed sensor from being damaged by automatically disconnecting when the speed exceeds a limit.

2. The explosion-proof speed sensor according to claim 1, characterized in that: The transmission mechanism comprises: a mounting frame (5), the mounting frame (5) being fixedly arranged on the upper surface of one end of the mounting seat (1) facing the shaft body (4) to be measured, a rotating center disk (6) being installed on the inner surface of the mounting frame (5), and a connecting tube (7) being fixedly arranged on one end of the center disk (6) facing the speed sensor body (2), and a connecting block (8) being slidably installed on the connecting tube (7) facing one end of the speed sensor body (2), an outer surface of the center disk (6) being penetrated by an adjusting rod (9), and a sliding disk (10) being rotatably connected to the adjusting rod (9) facing one end of the shaft body (4) to be measured, and a sliding clamping rod (11) being installed on the outer surface of the sliding disk (10), and a sliding extrusion ring (12) being installed on the outer surface of the sliding disk (10), and a supporting frame (13) being fixedly arranged on the upper surface of the mounting seat (1).

3. The explosion-proof speed sensor according to claim 2, characterized in that: The outer surface of the connecting tube (7) fits with the inner surface of the supporting bracket (13), and the inner surface of the supporting bracket (13) is designed to be arc-shaped. A spring is connected between the connecting tube (7) and the connecting block (8), and the connecting block (8) is mounted in a snap-fit ​​manner with the connecting head (3).

4. The explosion-proof speed sensor according to claim 2, characterized in that: The adjusting rod (9) is threadedly connected to the center disk (6), and the center disk (6) is fixedly connected to the extrusion ring (12); a spring is connected between the sliding disk (10) and the clamping rod (11); one end of the clamping rod (11) is designed in an arc shape, and the inner surface of the arc-shaped end of the clamping rod (11) fits with the outer surface of the shaft body (4) to be measured; the middle section of the clamping rod (11) is designed to be inclined toward the axis of the shaft body (4) to be measured, and the inclined surface of the middle section of the clamping rod (11) fits with the inner surface of the extrusion ring (12), and one end of the extrusion ring (12) is designed in an arc shape.

5. The explosion-proof speed sensor according to claim 2, characterized in that: The outer surface of the connecting block (8) is penetrated by a limiting block (14); one end of the connecting head (3) and the connecting block (8) is cross-shaped, and a slot (15) is provided on the side surface of the end of the connecting head (3) and the connecting block (8) where the connecting head (3) and the connecting block (8) are engaged with each other.

6. The explosion-proof speed sensor according to claim 5, characterized in that: The limit block (14) and the connecting block (8) are slidably connected, and a spring is connected between the limit block (14) and the connecting block (8). The lower end of the limit block (14) is designed as a right-angle trapezoid, and the inclined surface of the lower end of the limit block (14) is arranged toward the speed sensor body (2).

7. The explosion-proof speed sensor according to claim 5, characterized in that: The clamping slot (15) is clamped and installed with the limiting block (14), and the inner surface of the clamping slot (15) is in contact with the right-angled side of the lower end of the limiting block (14).

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