Non-contact rotating speed measuring device for rotary connector

Abstract

The utility model discloses a non-contact rotating speed measuring device for a rotary connector, and belongs to the technical field of rotating speed measurement. According to the utility model, the problem that the installation is time-consuming and labor-consuming because extremely high coaxial installation precision is needed in the process of measuring the rotating speed of the rotary connector by adopting an encoder in the prior art is solved. The device comprises a bottom plate, a photoelectric switch bracket, a photoelectric switch and a trigger piece, the bottom plate, the photoelectric switch bracket and the photoelectric switch are connected in sequence; the photoelectric switch bracket is used for adjusting the position of the photoelectric switch; the trigger piece is installed on the rotary connector and synchronously rotates along with the rotary connector, the trigger piece is used for triggering the optoelectronic switch, and a distance is arranged between the trigger piece and the optoelectronic switch. The trigger piece and the rotary connector do not need to be coaxially mounted, so that the mounting difficulty is reduced, and the mounting is convenient; the position adjustment of the photoelectric switch is convenient, time-saving and labor-saving.

Description

Technical Field

[0001] The utility model relates to the technical field of rotation speed measurement, in particular to a non-contact rotation speed measuring device for a rotary connector. Background Art

[0002] A rotary connector is a connector used to transmit power, signals or data, and its characteristic is that it can achieve rotational motion during the connection process. It allows the plug and socket of the connector to rotate freely when connected without affecting the stability of the connection and the reliability of signal transmission. The speed accuracy and speed stability of the rotary connector are important technical indicators.

[0003] In the prior art, an encoder is used to measure the rotation speed of a rotary connector. Specifically, the encoder, coupling and rotary connector are connected in sequence, the rotary connector rotates, and then the rotor of the encoder is driven to rotate, and finally the rotation speed of the rotary connector is measured by the encoder. During the installation process, it is necessary to ensure that the rotary connector and the encoder are installed coaxially. If the two axes are slightly offset, it will lead to inaccurate measurement, and even the coupling will be screwed during the rotation process. At the same time, the installation of the rotary connector, coupling and encoder is time-consuming and laborious. Utility Model Content

[0004] In view of the above analysis, the utility model aims to provide a non-contact speed measuring device for a rotary connector, so as to solve the problem that in the existing process of measuring the speed of a rotary connector using an encoder, extremely high coaxial installation accuracy is required, resulting in time-consuming and labor-intensive installation.

[0005] The purpose of this utility model is mainly achieved through the following technical solutions:

[0006] The utility model provides a non-contact speed measuring device for a rotary connector, comprising a base plate, a photoelectric switch bracket, a photoelectric switch and a trigger;

[0007] The bottom plate, the photoelectric switch bracket and the photoelectric switch are connected in sequence; the photoelectric switch bracket is used to adjust the position of the photoelectric switch;

[0008] The triggering member is installed on the rotary connector and rotates synchronously with the rotary connector. The triggering member is used to trigger the photoelectric switch, and a distance is set between the triggering member and the photoelectric switch.

[0009] Further, the photoelectric switch bracket includes a first direction adjustment part, a second direction adjustment part and a third direction adjustment part which are connected in sequence;

[0010] The first direction adjustment part is connected to the bottom plate, and the first direction adjustment part is used to adjust the height of the photoelectric switch;

[0011] The third direction adjustment part is connected to the photoelectric switch, and the third direction adjustment part is used to adjust the vertical distance between the photoelectric switch and the triggering element.

[0012] Further, the first direction adjustment part includes a mounting shell, a lead screw rotatably connected to the mounting shell, a lead screw nut rotatably connected to the lead screw, and a fixing member connected to the lead screw nut;

[0013] The mounting shell is connected to the base plate;

[0014] The central axis of the lead screw is perpendicular to the base plate;

[0015] The fixing member is connected to the second direction adjusting portion.

[0016] Furthermore, the second direction adjusting portion includes a connecting member rotatably connected to the fixing member.

[0017] Further, the third direction adjustment portion includes a fixing seat arranged on the connecting member and an adjustment component connected to the fixing seat;

[0018] The fixed seat moves along the connecting piece and can rotate around the connecting piece;

[0019] The adjustment component is used to connect the photoelectric switch and to adjust the vertical distance between the photoelectric switch and the trigger member.

[0020] Further, the adjustment assembly includes a first adjustment unit;

[0021] The first adjustment unit includes a threaded rod having a through hole;

[0022] The threaded rod is screwed to the fixing seat;

[0023] The central axis of the through hole is parallel to the central axis of the threaded rod.

[0024] Further, the adjustment component also includes a second adjustment unit;

[0025] The second adjusting unit includes a driving gear, a driven gear meshingly connected with the driving gear, a first rotating member having an internal thread, and a second rotating member having an external thread;

[0026] The driving gear is connected to the fixed seat;

[0027] The first rotating member passes through the fixed seat and is rotatably connected to the fixed seat;

[0028] The second rotating member is threadedly connected to the first rotating member;

[0029] The driven gear is sleeved on the outer wall of the first rotating member and a gap is arranged between the driven gear and the fixing seat.

[0030] Furthermore, the triggering member is adhered to the side wall of the rotary connector.

[0031] Furthermore, the vertical distance between the photoelectric switch and the triggering element is 2 mm-5 mm.

[0032] Furthermore, it also includes a signal controller, a digital frequency meter and a host computer;

[0033] The photoelectric switch, signal controller, digital frequency meter and host computer are connected in sequence.

[0034] Compared with the prior art, the present invention can achieve at least one of the following beneficial effects:

[0035] 1. Compared with the existing rotary connector connected to the encoder through a coupling, in the speed measurement device of this embodiment, except for the triggering member installed on the rotary connector, other components do not contact the supporting rotary connector. Specifically: this embodiment is provided with a triggering member and a photoelectric switch, and a distance is set between the triggering member and the photoelectric switch. When the triggering member rotates synchronously with the rotary connector, the speed data is collected. Because the triggering member and the rotary connector do not need to be coaxially installed, the installation difficulty is reduced and the installation is convenient.

[0036] 2. Compared with the existing rotary connector and encoder that need to be coaxially installed and have high coaxial accuracy requirements, this embodiment only adjusts the position of the photoelectric switch through the photoelectric switch bracket, and makes the photoelectric switch located in the radial direction of the trigger member, and then adjusts the vertical distance between the photoelectric switch and the trigger member to facilitate the speed data collection. The position of the photoelectric switch is easy to adjust, saving time and effort.

[0037] 3. Compared with the one-to-one correspondence of the existing rotary connector, coupling and encoder, multiple photoelectric switches can be installed on a photoelectric switch bracket in the speed measuring device of this embodiment. By adjusting the position of the photoelectric switch, one photoelectric switch corresponds to one rotary connector. The adjustment and installation are convenient, so that the speed data of multiple rotary connectors can be quickly collected on the product inspection line of the rotary connector.

[0038] In the present invention, the above-mentioned technical solutions can also be combined with each other to achieve more preferred combination solutions. Other features and advantages of the present invention will be described in the subsequent description, and some advantages can become obvious from the description, or can be understood by implementing the present invention. The purpose and other advantages of the present invention can be achieved and obtained through the contents particularly pointed out in the embodiments of the description and the drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0039] The accompanying drawings are only used for the purpose of illustrating specific embodiments and are not to be considered as limiting the present invention. In the entire drawings, the same reference symbols represent the same components.

[0040] Figure 1It is a structural schematic diagram of a non-contact speed measuring device for a rotary connector in the utility model;

[0041] Figure 2 It is a schematic diagram of the structure after the base plate, photoelectric switch bracket and rotary connector are connected;

[0042] Figure 3 It is a schematic diagram of the structure after the base plate, photoelectric switch bracket, photoelectric switch, trigger and rotary connector are connected;

[0043] Figure 4 is a structural schematic diagram of a first direction adjustment unit;

[0044] Figure 5 is a schematic diagram of the structure of the connection components;

[0045] Figure 6 It is a schematic structural diagram of the second regulating unit.

[0046] Reference numerals:

[0047] 100-base plate, 200-photoelectric switch bracket, 300-photoelectric switch, 400-trigger, 500-host computer, 600-rotating connector, 700-signal controller, 800-digital frequency meter;

[0048] 210 - first direction adjustment part, 220 - second direction adjustment part, 230 - third direction adjustment part;

[0049] 211-mounting housing, 212-screw, 213-fixing member, 214-flange, 215-connecting assembly;

[0050] 221-connector;

[0051] 2151-limiting shell, 2152-elastic member, 2153-limiting rod, 2154-limiting plate;

[0052] 231-fixed seat, 232-adjusting assembly;

[0053] 2321-first regulating unit, 2322-second regulating unit;

[0054] a1-driving gear, a2-driven gear, a3-first rotating member, a4-second rotating member. DETAILED DESCRIPTION

[0055] The preferred embodiments of the present invention are described in detail below in conjunction with the accompanying drawings, wherein the accompanying drawings constitute a part of the present invention and are used together with the embodiments of the present invention to illustrate the principles of the present invention, but are not used to limit the scope of the present invention.

[0056] Example

[0057] The utility model provides a specific embodiment, disclosing a non-contact speed measuring device for a rotary connector, such as Figure 1 As shown, it includes a base plate 100, a photoelectric switch bracket 200, a photoelectric switch 300 and a trigger member 400; the base plate 100, the photoelectric switch bracket 200 and the photoelectric switch 300 are connected in sequence; the photoelectric switch bracket 200 is used to adjust the position of the photoelectric switch 300; the trigger member 400 is installed on the rotating connector 600 and rotates synchronously with the rotating connector 600, the trigger member 400 is used to trigger the photoelectric switch 300, and a distance is set between the trigger member 400 and the photoelectric switch 300.

[0058] Compared with the existing rotary connector connected to the encoder through a coupling, in the rotation speed measuring device of this embodiment, except for the trigger member 400 installed on the rotary connector 600, other components do not contact the supporting rotary connector 600. Specifically, in this embodiment, the trigger member 400 and the photoelectric switch 300 are provided, and a distance is provided between the trigger member 400 and the photoelectric switch 300, and the rotation speed data is collected during the synchronous rotation of the trigger member 400 with the rotary connector 600. Because the trigger member 400 and the rotary connector 600 do not need to be installed coaxially, the installation difficulty is reduced and the installation is convenient.

[0059] Compared with the existing rotary connector and encoder that need to be coaxially installed and have high requirements for coaxial accuracy, this embodiment only adjusts the position of the photoelectric switch 300 through the photoelectric switch bracket 200, and makes the photoelectric switch 300 located in the radial direction of the trigger member 400, and then adjusts the vertical distance between the photoelectric switch 300 and the trigger member 400 to facilitate the speed data collection. The position of the photoelectric switch 300 is easy to adjust, saving time and effort.

[0060] Compared with the one-to-one correspondence of existing rotary connectors, couplings and encoders, multiple photoelectric switches 300 can be installed on a photoelectric switch bracket 200 in the speed measuring device of this embodiment. By adjusting the position of the photoelectric switch 300, one photoelectric switch 300 corresponds to one rotary connector 600. The adjustment and installation are convenient, so that the speed data of multiple rotary connectors 600 can be quickly collected on the product inspection line of the rotary connector 600.

[0061] Furthermore, the rotation speed measuring device of the present embodiment further comprises a signal controller 700, a digital frequency meter 800 and a host computer 500, and the photoelectric switch 300, the signal controller 700, the digital frequency meter 800 and the host computer 500 are connected in sequence, such as Figure 1 shown.

[0062] In this embodiment, the photoelectric switch 300 is used to detect whether the rotary connector 600 rotates one circle. Whenever the rotary connector 600 rotates one circle, the photoelectric switch 300 sends a switch signal.

[0063] In this embodiment, the signal controller 700 is a set of signal conditioning circuits, which is used to reduce the trigger error between the switch signal sent by the photoelectric switch 300 and the digital frequency meter 800. Since the photoelectric switch 300 collects signals from the rotating connector 600 in a rotating state, its signal is in a single peak state during the acquisition period of the switch signal. Through the bandpass filtering of the signal controller 700, the trigger strength can be controlled within the required range, effectively improving the reliability of the trigger and the accuracy of the frequency signal calculation.

[0064] In this embodiment, the digital frequency meter 800 is used to count the number of frequency signals obtained within one switch signal (i.e., one rotation). Since the digital frequency meter 800 sends out a standard frequency signal, the most accurate time can be obtained by calculating the number of frequency signals.

[0065] In this embodiment, the time taken by the upper computer 500 and the measurement software therein can be calculated to obtain the time taken by the rotary connector 600 to rotate one circle. When the fixed angle measurement method is used, the formula ω=360 / t (unit: ° / s) can be used to obtain the single-circle speed of the rotary connector 600. Since the speed of the rotary connector 600 fluctuates, 20 revolutions are set as a cut cycle, the root mean square RMS value of the cut cycle is calculated, the speed error is calculated by the RMS value, and the variance within the cut cycle is calculated as the result of the speed stability.

[0066] Furthermore, considering the triggering accuracy of the photoelectric switch 300 , the vertical distance between the photoelectric switch 300 and the triggering member 400 in the rotation speed measuring device of this embodiment is 2 mm-5 mm.

[0067] Further, considering the adjustment of the position of the photoelectric switch 300, the photoelectric switch bracket 200 includes a first direction adjustment portion 210, a second direction adjustment portion 220 and a third direction adjustment portion 230 connected in sequence, such as Figure 2 As shown; the first direction adjustment part 210 is connected to the base plate 100, and the height of the photoelectric switch 300 is adjusted by the first direction adjustment part 210, and the straight-line distance between the photoelectric switch 300 and the first direction adjustment part 210 is adjusted by the second direction adjustment part 220; the third direction adjustment part 230 is connected to the photoelectric switch 300, and the vertical distance between the photoelectric switch 300 and the trigger member 400 is adjusted by the third direction adjustment part 230.

[0068] Furthermore, the structure of the first direction adjusting portion 210 includes at least two types:

[0069] In the first structural form, the first direction adjustment part 210 includes a first fixed seat, a first connecting rod and a first movable seat connected in sequence, the first movable seat is slidably connected to the first connecting rod, and the first fixed seat is connected to the bottom plate 100, such as Figure 2 The first movable seat slides up and down along the first connecting rod to achieve up and down adjustment of the second direction adjustment part 220 , thereby achieving up and down position adjustment of the photoelectric switch 300 connected to the third direction adjustment part 230 .

[0070] The second structural form, considering the stability of the adjustment of the first direction adjustment part 210 and the precision control of the height adjustment, the first direction adjustment part 210 includes a mounting shell 211, a lead screw 212 rotatably connected to the mounting shell, a lead screw nut rotatably connected to the lead screw 212, and a fixing member 213 fixedly connected to the lead screw nut; the mounting shell 211 is connected to the base plate 100; the central axis of the lead screw 212 is perpendicular to the base plate 100; the fixing member 213 is connected to the second direction adjustment part 220, such as Figure 3 and Figure 4 shown.

[0071] Furthermore, considering the quick connection between the first direction adjusting portion 210 and the base plate 100, the first direction adjusting portion 210 further includes a connecting component 215 and a flange 214 connected to the connecting component 215, and the flange 214 is connected to the mounting shell 211 and / or the first fixing seat. The connection between the flange 214 and the base plate 100 is achieved through the connecting component 215. Figure 3 shown.

[0072] In this embodiment, the connecting assembly 215 includes a limiting shell 2151 having a limiting groove, an elastic member 2152 arranged in the limiting groove, a limiting rod 2153 penetrating the limiting shell 2151, and a limiting plate 2154 connected to the limiting rod 2153; the limiting shell 2151 is fixedly connected to the flange 214, the limiting plate 2154 is located in the limiting groove and driven by the limiting rod 2153 to perform linear reciprocating motion in the limiting groove; the limiting shell 2151 includes a first through hole and a second through hole arranged opposite to each other, such as Figure 5 The flange 214 includes a third through hole disposed opposite to the first through hole, such as Figure 4As shown; the first end of the limiting rod 2153 is connected to the handle, and the second end of the limiting rod 2153 passes through the first through hole, the elastic member 2152, the second through hole and the third through hole in sequence. Based on the compression and extension performance of the elastic member 2152, by pulling the limiting rod 2153, the limiting rod 2153 performs linear reciprocating motion between the third through hole and the connecting hole on the bottom plate 100, thereby realizing the connection between the flange 214 and the bottom plate 100, thereby realizing the quick connection between the first direction adjustment part 210 and the bottom plate 100. Specifically, when the second end of the limiting rod 2153 is located in the connecting hole on the bottom plate 100, the flange 214 is connected to the bottom plate 100, and the first direction adjustment part 210 is connected to the bottom plate 100; when the second end of the limiting rod 2153 is located in the third through hole on the flange 214, the flange 214 is not connected to the bottom plate 100, and the first direction adjustment part 210 is not connected to the bottom plate 100.

[0073] Furthermore, the second direction adjusting portion 220 includes a connecting member 221 connected to the first direction adjusting portion 210, such as Figure 3 shown.

[0074] In this embodiment, when the first direction adjustment portion 210 includes a first moving seat, the connecting member 221 is connected to the first moving seat. Figure 2 shown.

[0075] In this embodiment, when the first direction adjusting portion 210 includes a fixing member 213, the connecting member 221 and the fixing member 213 are connected. Figure 3 shown.

[0076] In this embodiment, the connecting member 221 is preferably a connecting rod.

[0077] Furthermore, the third direction adjustment portion 230 includes a fixing seat 231 arranged on the second direction adjustment portion 220 and an adjustment component 232 connected to the fixing seat 231. Figure 2 As shown, specifically, the fixing seat 231 is connected to the connecting member 221 , the fixing seat 231 moves along the connecting member 221 and can rotate around the connecting member 221 ; the adjusting component 232 is used to connect the photoelectric switch 300 , and is used to adjust the distance between the photoelectric switch 300 and the rotating connector 600 .

[0078] In this embodiment, the fixing seat 231 is slidably connected to the connecting member 221, and the fixing seat 231 slides along the connecting member 221 to adjust the straight-line distance between the fixing seat 231 and the first direction adjusting portion 210, thereby adjusting the straight-line distance between the photoelectric switch 300 and the first direction adjusting portion 210.

[0079] In this embodiment, the structures of the adjustment component 232 include at least two types, specifically:

[0080] The first type: the adjustment assembly 232 includes a first adjustment unit 2321; the first adjustment unit 2321 includes a threaded rod with a through hole, such as Figure 2 and Figure 3 As shown; the threaded rod is screwed to the fixing seat 231. The threaded rod passes through the fixing seat 231 and is connected to the photoelectric switch 300. The vertical distance between the photoelectric switch 300 and the trigger 400 is adjusted by rotating the threaded rod. The central axis of the through hole is parallel to the central axis of the threaded rod. The through hole is used to arrange the cables of the photoelectric switch 300.

[0081] The second type: the adjustment assembly 232 also includes a second adjustment unit 2322; the second adjustment unit 2322 includes: a driving gear a1, a driven gear a2 meshing with the driving gear a1, a first rotating member a3 with an internal thread, and a second rotating member a4 with an external thread, such as Figure 6 As shown; the driving gear a1 is connected to the fixed base 231; the first rotating member a3 passes through the fixed base 231 and is rotatably connected to the fixed base 231; the second rotating member a4 is threadedly connected to the first rotating member a3; the driven gear a2 is sleeved on the outer wall of the first rotating member a3 and a gap is set between it and the fixed base 231.

[0082] Furthermore, the trigger member 400 is attached to the side wall of the rotary connector 600, which is easy to install and will not damage the rotary connector 600. Compared with the connection coupling and encoder, the rotation load of the rotary connector 600 is greatly reduced.

[0083] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by any technician familiar with the technical field within the technical scope disclosed in the present invention should be included in the protection scope of the present invention.

Claims

1. A non-contact speed measuring device for a rotary connector, characterized in that: It comprises a base plate (100), a photoelectric switch bracket (200), a photoelectric switch (300) and a triggering member (400); The bottom plate (100), the photoelectric switch bracket (200) and the photoelectric switch (300) are connected in sequence; the photoelectric switch bracket (200) is used to adjust the position of the photoelectric switch (300); The trigger member (400) is mounted on the rotating connector (600) and rotates synchronously with the rotating connector (600). The trigger member (400) is used to trigger the photoelectric switch (300), and a distance is set between the trigger member (400) and the photoelectric switch (300).

2. The non-contact speed measuring device for a rotary connector according to claim 1, characterized in that: The photoelectric switch bracket (200) comprises a first direction adjustment portion (210), a second direction adjustment portion (220) and a third direction adjustment portion (230) which are connected in sequence; The first direction adjusting portion (210) is connected to the bottom plate (100), and the first direction adjusting portion (210) is used to adjust the height of the photoelectric switch (300); The third direction adjustment portion (230) is connected to the photoelectric switch (300), and the third direction adjustment portion (230) is used to adjust the vertical distance between the photoelectric switch (300) and the trigger member (400).

3. The non-contact speed measuring device for a rotary connector according to claim 2, characterized in that: The first direction adjustment portion (210) comprises a mounting shell (211), a lead screw (212) rotatably connected to the mounting shell (211), a lead screw nut rotatably connected to the lead screw (212), and a fixing member (213) connected to the lead screw nut; The mounting shell (211) is connected to the base plate (100); The central axis of the lead screw (212) is perpendicular to the base plate (100); The fixing member (213) is connected to the second direction adjusting portion (220).

4. The non-contact speed measuring device for a rotary connector according to claim 3, characterized in that: The second direction adjusting portion (220) comprises a connecting member (221) rotatably connected to the fixing member (213).

5. The non-contact speed measuring device for a rotary connector according to claim 4, characterized in that: The third direction adjustment portion (230) comprises a fixing seat (231) arranged on the connecting member (221) and an adjustment component (232) connected to the fixing seat (231); The fixing seat (231) moves along the connecting member (221) and is capable of rotating around the connecting member (221); The adjustment component (232) is used to connect the photoelectric switch (300) and to adjust the vertical distance between the photoelectric switch (300) and the trigger member (400).

6. The non-contact speed measuring device for a rotary connector according to claim 5, characterized in that: The adjustment component (232) comprises a first adjustment unit (2321); The first adjustment unit (2321) comprises a threaded rod having a through hole; The threaded rod is threadedly connected to the fixing seat (231); The central axis of the through hole is parallel to the central axis of the threaded rod.

7. The non-contact speed measuring device for a rotary connector according to claim 5, characterized in that: The adjustment component (232) further includes a second adjustment unit (2322); The second adjusting unit (2322) comprises a driving gear (a1), a driven gear (a2) meshingly connected with the driving gear (a1), a first rotating member (a3) ​​having an internal thread, and a second rotating member (a4) having an external thread; The driving gear (a1) is connected to the fixing seat (231); The first rotating member (a3) ​​passes through the fixing seat (231) and is rotatably connected to the fixing seat (231); The second rotating member (a4) is threadedly connected to the first rotating member (a3); The driven gear (a2) is sleeved on the outer wall of the first rotating member (a3) ​​and a gap is provided between the driven gear (a2) and the fixed seat (231).

8. The non-contact speed measuring device for a rotary connector according to claim 1, characterized in that: The trigger member (400) is adhered to the side wall of the rotary connector (600).

9. The non-contact speed measuring device for a rotary connector according to any one of claims 1 to 8, characterized in that: The vertical distance between the photoelectric switch (300) and the trigger element (400) is 2 mm to 5 mm.

10. The non-contact speed measuring device for a rotary connector according to any one of claims 1 to 8, characterized in that: It also includes a signal controller (700), a digital frequency meter (800) and a host computer (500); The photoelectric switch (300), the signal controller (700), the digital frequency meter (800) and the host computer (500) are connected in sequence.

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