CN213148970U

CN213148970U - Speed measuring device

Info

Publication number: CN213148970U
Application number: CN202022396163.XU
Authority: CN
Inventors: 戴奎; 陈波; 张礼强
Original assignee: Shanghai Shangshi Energy Technology Co ltd
Current assignee: Shanghai Shangshi Aeroengine Co ltd
Priority date: 2020-10-23
Filing date: 2020-10-23
Publication date: 2021-05-07
Anticipated expiration: 2030-10-23

Abstract

The utility model relates to a speed measurement technical field discloses a speed sensor for measure the rotational speed of axis of rotation, include: the speed transmission mechanism comprises a bevel gear, a connecting part is arranged on the bevel gear, the connecting part is cylindrical, the axis of the connecting part is collinear with the axis of the bevel gear, external meshing teeth are arranged on the outer wall surface of the connecting part, a connecting hole is formed in the rotating shaft, internal meshing teeth are arranged on the wall surface of the connecting hole, and the external meshing teeth can be sleeved and meshed with the internal meshing teeth; the speed measuring component comprises a support frame and a rotating speed sensor, the support frame is connected to the equipment rack, the rotating speed sensor and the bevel gear are both installed on the support frame, the measuring end of the rotating speed sensor is arranged on the outer side of the gear teeth of the bevel gear at intervals, and the rotating speed sensor can obtain the rotating speed of the bevel gear by measuring the frequency of the gear teeth rotating. The speed measuring device can measure the running speed of equipment by measuring the rotating speed of the rotating shaft, and has strong adaptability and universality.

Description

Speed measuring device

Technical Field

The utility model relates to a speed measuring technical field especially relates to a speed measuring device.

Background

With the rapid development of science and technology, various mechanical devices are invented and manufactured for people to use, thereby facilitating the life of people to a great extent and promoting the social progress.

The speed measuring equipment is used for measuring the running speed of the mechanical equipment, the running stability of the mechanical equipment can be guaranteed, and the personal safety of operators can be guaranteed. At present, although various existing speed measuring devices are available, the existing speed measuring devices are strong in specificity, generally, one speed measuring device can only be used for measuring the running speeds of several mechanical equipment or even one mechanical equipment, and cannot be widely applied to various mechanical equipment, and the defects of poor adaptability and universality exist.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a speed sensor, this speed sensor can come measuring equipment's functioning speed through the rotational speed of measuring the axis of rotation, have stronger adaptability and commonality.

To achieve the purpose, the utility model adopts the following technical proposal:

a speed measuring device for measuring a rotational speed of a rotating shaft, comprising:

the speed transmission mechanism comprises a bevel gear, a connecting part is arranged on the bevel gear, the connecting part is cylindrical, the axis of the connecting part is collinear with the axis of the bevel gear, external meshing teeth are arranged on the outer wall surface of the connecting part, a connecting hole is formed in the rotating shaft, internal meshing teeth are arranged on the wall surface of the connecting hole, and the external meshing teeth can be sleeved and meshed with the internal meshing teeth;

the speed measuring assembly comprises a support frame and a rotating speed sensor, the support frame is connected to an equipment rack, the rotating speed sensor and the bevel gear are installed on the support frame, measuring ends of the rotating speed sensor are arranged on the outer side of gear teeth of the bevel gear at intervals, and the rotating speed sensor can obtain the rotating speed of the bevel gear by measuring the rotating frequency of the gear teeth.

Preferably, the speed transmission mechanism further comprises a positioning rod and a positioning assembly, a first shaft shoulder is arranged on the positioning rod, a second shaft shoulder is arranged in the connecting hole, the first shaft shoulder abuts against the second shaft shoulder, and the positioning assembly is connected to the positioning rod and presses the bevel gear onto the rotating shaft.

Preferably, the positioning assembly comprises a locking bolt and a positioning gasket, a threaded hole is formed in the positioning rod, the locking bolt penetrates through the positioning gasket and is connected into the threaded hole, and the positioning gasket compresses the connecting part on the rotating shaft.

Preferably, the positioning assembly further comprises a sealing ring, a sealing ring mounting groove is formed in the first shaft shoulder, and the sealing ring is mounted in the sealing ring mounting groove and is in sealing abutting connection with the wall surface of the connecting hole.

Preferably, the support frame comprises a first support and a second support, the bevel gear is mounted in the first support, the first support or the second support is connected to the equipment rack, the second support is connected to the first support, and the rotation speed sensor is connected to the second support.

Preferably, the first support is provided with a boss, the second support is provided with a groove, and the boss is inserted into the groove.

Preferably, the second bracket is provided with a mounting hole, and the rotation speed sensor is mounted in the mounting hole.

Preferably, an axis of the mounting hole is disposed perpendicular to a tooth crest of the gear teeth.

Preferably, a centering gasket is arranged in the mounting hole, and the centering gasket is clamped between the rotation speed sensor and the second support.

Preferably, the distance between the gear teeth and the measuring end of the rotating speed sensor is set to be 0.5mm-1.5 mm.

The utility model has the advantages that:

the utility model provides a speed sensor for the rotational speed of axis of rotation in the measuring equipment, this speed sensor includes speed transmission mechanism and speed measuring subassembly, speed transmission mechanism includes bevel gear, the last connecting portion that are equipped with of bevel gear, be equipped with the external toothing on the outer wall of connecting portion, be equipped with the connecting hole in the axis of rotation, be equipped with the internal toothing in the connecting hole, external toothing cover is established and is engaged in on the internal toothing, make the axis of rotation can drive bevel gear synchronous rotation (promptly, the rotational speed of axis of rotation can transmit to bevel gear on the ground without the harm). The subassembly that tests the speed includes support frame and speed sensor, the support frame is connected on the equipment rack, speed sensor and bevel gear are all installed on the support frame, and speed sensor's measurement end interval sets up in bevel gear's the teeth of a cogwheel outside, speed sensor is used for measuring the frequency that the teeth of a cogwheel rotated, the number of teeth through the frequency that the teeth of a cogwheel rotated speed sensor and bevel gear can calculate the rotational speed that obtains bevel gear, thereby obtain the rotational speed of axis of rotation, the realization is to the measurement of equipment functioning speed, stronger adaptability and commonality have.

Drawings

Fig. 1 is a half sectional view of a speed measuring device according to an embodiment of the present invention.

In the figure:

1. a speed transmission mechanism; 11. a bevel gear; 111. a connecting portion; 12. positioning a rod; 121. a first shoulder; 13. a positioning assembly; 131. locking the bolt; 132. positioning the gasket; 133. a seal ring; 2. a speed measuring component; 21. a support frame; 211. a first bracket; 212. a second bracket; 213. a centered spacer; 22. a rotational speed sensor; 100. a rotating shaft; 101. connecting holes; 102. and a second shoulder.

Detailed Description

In order to make the technical problem solved by the present invention, the technical solutions adopted by the present invention and the technical effects achieved by the present invention clearer, the following will be described in further detail with reference to the accompanying drawings, and obviously, the described embodiments are only some embodiments of the present invention, but not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by the skilled in the art without creative work belong to the protection scope of the present invention.

In the description of the present invention, unless expressly stated or limited otherwise, the terms "connected," "connected," and "fixed" are to be construed broadly, e.g., as meaning permanently connected, detachably connected, or integral to one another; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

The technical solution of the present invention is further explained by the specific embodiments with reference to the drawings.

The utility model provides a speed sensor, this speed sensor are used for the rotational speed of rotating shaft 100 in the measuring equipment, as shown in fig. 1, this speed sensor is including passing fast mechanism 1 and velocity measurement subassembly 2, passes fast mechanism 1 and is connected with velocity measurement subassembly 2, passes fast mechanism 1 and is used for drawing out the rotation of rotating shaft 100, and velocity measurement subassembly 2 obtains the rotational speed of rotating shaft 100 through measuring the rotational speed that passes fast mechanism 1, realizes the measurement to equipment running speed.

Specifically, the speed transmission mechanism 1 includes a bevel gear 11, a connecting portion 111 is disposed on an end surface of the bevel gear 11 away from the gear teeth, and an outer tooth is disposed on an outer wall surface of the connecting portion 111 and is used for being connected to the rotating shaft 100. A connecting hole 101 is formed in the rotating shaft 100, inner meshing teeth are arranged on the inner wall surface of the connecting hole 101, and the outer meshing teeth can be sleeved on and meshed with the inner meshing teeth to realize transmission connection between the bevel gear 11 and the rotating shaft 100, so that the rotating shaft 100 can drive the bevel gear 11 to rotate synchronously (namely, the rotating speed of the rotating shaft 100 can be transmitted to the bevel gear 11 without loss). Preferably, the connecting portion 111 is provided in a cylindrical shape, and the axis of the connecting portion 111 is provided in line with the axis of the bevel gear 11, so as to facilitate the positioning and arrangement of the connecting portion 111 on the bevel gear 11.

Preferably, the speed transmission mechanism 1 further includes a positioning rod 12 and a positioning assembly 13, the positioning rod 12 is provided with a first shoulder 121, a second shoulder 102 is arranged in the connecting hole 101, the first shoulder 121 abuts against the second shoulder 102, and the positioning assembly 13 is connected to the positioning rod 12 and presses the bevel gear 11 onto the rotating shaft 100, so that the bevel gear 11 is axially positioned on the rotating shaft 100, and the bevel gear 11 is prevented from being disconnected from the rotating shaft 100.

In this embodiment, the positioning assembly 13 includes a locking bolt 131 and a positioning washer 132, a threaded hole is formed in the positioning rod 12, the locking bolt 131 penetrates through a central hole of the positioning washer 132 and is connected in the threaded hole, the positioning washer 132 is tightly pressed between the bolt head and the positioning rod 12, so that the positioning washer 132 tightly presses the connecting portion 111 on the rotating shaft 100, and the bevel gear 11 is axially positioned.

Preferably, the transmission mechanism 1 further includes a seal ring 133, the first shoulder 121 is provided with a seal ring installation groove, and the seal ring 133 is installed in the seal ring installation groove and is in sealing contact with an inner wall surface of the connection hole 101, so as to prevent lubricating oil added at a meshing position of the external gear and the internal gear from leaking into the connection hole 101. In particular, the sealing ring 133 is provided as an O-ring, which is cheap, simple to manufacture and functionally reliable.

In this embodiment, the supporting frame 21 includes a first bracket 211 and a second bracket 212, the bevel gear 11 is installed in the first bracket 211, the first bracket 211 is connected to the equipment rack, the second bracket 212 is connected to the first bracket 211, and the rotation speed sensor 22 is connected to the second bracket 212. It is understood that the support frame 21 may be connected to the equipment rack by connecting the second bracket 212 to the equipment rack and connecting the first bracket 211 to the second bracket 212. Preferably, the first bracket 211 can be manufactured by an external protection frame of the rotating shaft 100, so that the first bracket 211 can be prevented from being manufactured additionally, which is beneficial to reducing the manufacturing cost of the speed measuring device.

Specifically, the first bracket 211 and the second bracket 212 are positioned by four bolt connections, so that the connection of the first bracket 211 and the second bracket 212 is convenient and detachable. Preferably, a boss is arranged on the first support 211, a groove is arranged on the second support 212, and the boss is inserted into the groove, so that circumferential positioning of the first support 211 and the second support 212 is facilitated. Further, a plurality of bosses are distributed on the same circumference centering on the axis of the bevel gear 11, and a plurality of grooves are correspondingly arranged with one of the bosses, which is beneficial to further enhance the circumferential positioning of the first bracket 211 and the second bracket 212.

In this embodiment, the second bracket 212 is provided with a mounting hole, and the rotation speed sensor 22 is inserted and mounted in the mounting hole, so that the connection between the rotation speed sensor 22 and the second bracket 212 is convenient. Preferably, two mounting holes are oppositely formed in the second bracket 212, so that two rotation speed sensors 22 can be mounted on the speed measuring device, the speed measuring device can measure the bevel gear 11 twice at the same time, and then two groups of measurement results can be analyzed and compared subsequently, which is beneficial to improving the measurement accuracy of the speed measuring device. Specifically, the axis of the mounting hole is set to be perpendicular to the tooth crest of the teeth of the bevel gear 11, which is beneficial to making the distance between the measuring end of the rotation speed sensor 22 and the teeth equal everywhere, and is beneficial to improving the accuracy of measurement. Be equipped with gasket 213 in the middle in the mounting hole, gasket 213 in the middle presss from both sides and locates between tachometric sensor 22 and second support 212 for tachometric sensor 22 and mounting hole have better axiality, are favorable to guaranteeing that the axis of tachometric sensor 22 and the tooth top of the bevel gear 11 teeth of a cogwheel have good straightness that hangs down. In the present embodiment, the range of the distance between the gear teeth and the measuring end of the revolution speed sensor 22 is set to 0.5mm to 1.5mm, and specifically, the distance between the gear teeth and the measuring end of the revolution speed sensor 22 is set to 1 mm. It is understood that the distance between the gear teeth and the measuring end of the revolution speed sensor 22 can be designed by those skilled in the art according to actual situations.

Preferably, the rotation speed sensor 22 is configured as an electromagnetic sensor, when the bevel gear 11 rotates, the gear teeth of the bevel gear 11 cut the magnetic induction lines at the measuring end of the rotation speed sensor 22 to cause a potential change, the change frequency is the frequency of the gear teeth rotating, and the rotation speed of the bevel gear 11 can be obtained through calculation according to the frequency of the gear teeth rotating the rotation speed sensor 22 and the number of the teeth of the bevel gear 11, so as to obtain the rotation speed of the rotating shaft 100, so that the speed measuring device has strong adaptability and universality in measuring the operating speed of the device.

It should be noted that, in this embodiment, the occupied space of the speed measuring device can be reduced by changing the taper of the bevel gear 11 (the angle of the rotation speed sensor 22 is also adjusted), so as to avoid interference with the device to be measured, and further expand the application range of the speed measuring device.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Numerous obvious variations, rearrangements and substitutions will now occur to those skilled in the art without departing from the scope of the invention. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. A speed measuring device for measuring the speed of rotation of a rotating shaft (100), comprising:

the speed transmission mechanism (1) comprises a bevel gear (11), a connecting part (111) is arranged on the bevel gear (11), the connecting part (111) is cylindrical, the axis of the connecting part (111) is collinear with the axis of the bevel gear (11), external meshing teeth are arranged on the outer wall surface of the connecting part (111), a connecting hole (101) is formed in the rotating shaft (100), internal meshing teeth are arranged on the wall surface of the connecting hole (101), and the external meshing teeth can be meshed with the internal meshing teeth in a sleeved mode;

the speed measuring assembly (2) comprises a support frame (21) and a rotating speed sensor (22), the support frame (21) is connected to an equipment rack, the rotating speed sensor (22) and the bevel gear (11) are installed on the support frame (21), the measuring end of the rotating speed sensor (22) is arranged on the outer side of the gear teeth of the bevel gear (11) at intervals, and the rotating speed sensor (22) can obtain the rotating speed of the bevel gear (11) by measuring the frequency of the gear teeth rotating.

2. The speed measuring device according to claim 1, wherein the speed transmission mechanism (1) further comprises a positioning rod (12) and a positioning assembly (13), a first shoulder (121) is disposed on the positioning rod (12), a second shoulder (102) is disposed in the connecting hole (101), the first shoulder (121) abuts against the second shoulder (102), and the positioning assembly (13) is connected to the positioning rod (12) and presses the bevel gear (11) onto the rotating shaft (100).

3. A speed measuring device according to claim 2, wherein the positioning assembly (13) comprises a locking bolt (131) and a positioning washer (132), a threaded hole is formed in the positioning rod (12), the locking bolt (131) passes through the positioning washer (132) and is connected to the threaded hole, and the positioning washer (132) presses the connecting portion (111) against the rotating shaft (100).

4. The speed measuring device according to claim 2, wherein the speed transmitting mechanism (1) further comprises a sealing ring (133), a sealing ring mounting groove is formed in the first shaft shoulder (121), and the sealing ring (133) is mounted in the sealing ring mounting groove and abuts against the wall surface of the connecting hole (101) in a sealing manner.

5. A tacho generator according to claim 1 wherein the support frame (21) comprises a first bracket (211) and a second bracket (212), the bevel gear (11) being mounted in the first bracket (211), the first bracket (211) or the second bracket (212) being attached to the equipment rack, the second bracket (212) being attached to the first bracket (211), the speed sensor (22) being attached to the second bracket (212).

6. A speed measuring device according to claim 5, wherein said first bracket (211) is provided with a boss, said second bracket (212) is provided with a recess, and said boss is inserted into said recess.

7. A tachometer means according to claim 5 wherein the second bracket (212) is provided with a mounting hole in which the tachometer sensor (22) is mounted.

8. A speed measuring device according to claim 7 wherein the axis of said mounting hole is arranged to be perpendicular to the top land of said gear teeth.

9. A tachometer means according to claim 7 wherein the mounting hole is provided with a centering washer (213), the centering washer (213) being sandwiched between the tachometer sensor (22) and the second bracket (212).

10. A tacho generator according to claim 1 wherein the gear teeth are located at a distance from the measuring end of the tacho sensor (22) in the range 0.5mm-1.5 mm.