Coding type photoelectric speed sensor

Abstract

The utility model discloses a coding type photoelectric speed sensor, and relates to the field of sensors. A coding type photoelectric speed sensor comprises a protective sleeve, a mounting groove is formed in the protective sleeve, a photoelectric encoder is inserted in the mounting groove, and the coding type photoelectric speed sensor further comprises a sealing sleeve detachably connected with the protective sleeve; the fixing ring is fixedly connected to the sealing sleeve and inserted into the Su Hu protective sleeve, the fixing ring is attached to the inner wall of the protective sleeve, the fixing ring is sleeved with a sealing ring, and the sealing ring is attached to the inner wall of the protective sleeve; the fixing ring extrudes the sealing ring to be tightly attached to the inner wall of the protective sleeve, so that the sealing performance of the connecting position of the protective sleeve and the sealing sleeve is improved, the wrapping air bag expands to be tightly attached to the sealing groove, and therefore the sealing performance of the connecting position of the protective sleeve and the sealing sleeve is improved. And water is prevented from entering the mounting groove through a gap at the joint of the protective sleeve and the sealing sleeve to damage the photoelectric encoder.

Description

Technical Field

[0001] The utility model belongs to the technical field of sensors, and specifically relates to a coded optoelectronic speed sensor. Background Art

[0002] A coded optoelectronic speed sensor is an advanced speed measurement device that combines optoelectronic technology and coding principle to achieve high-precision and high-reliability speed measurement.

[0003] For example, the utility model patent with the patent application number 201220550930.0 and the name of a speed sensor discloses a speed sensor, which includes an optoelectronic encoder, and a housing is arranged outside the optoelectronic encoder; the housing includes a rear cover, a body, a connecting shaft arranged on the body, and a waterproof plug arranged on the rear cover; the body includes a cylinder, a flange on one side of the cylinder, and a flange plate on the other side of the cylinder; one end of the connecting shaft is fixedly connected to the input shaft of the optoelectronic encoder, and the optoelectronic encoder is positioned on the body by means of a fixing piece, a hole is arranged on the rear cover, and the signal wire is led out through the waterproof plug; the other end of the connecting shaft is fixedly connected to the transmission shaft of the device to be measured. The utility model is provided with a housing and a connecting shaft. The rotation of the transmission shaft of the device to be measured drives the connecting shaft, and then drives the optoelectronic encoder to rotate, realizing the detection function, which can avoid the damage to the optoelectronic encoder caused by direct impact. The optoelectronic encoder is fixed to the body through a fixing piece. Cylindrical pin holes are opened on the connecting shaft and the input shaft of the optoelectronic encoder, and the fixing is relatively firm;

[0004] Although the above patent adds a waterproof plug to the rear cover to prevent water and conductive dust from damaging the optoelectronic encoder, the sealing performance between the flanges for connection is not good, so that water may enter the rear cover through the gap at the connection between the flanges and the flange plate, causing damage to the optoelectronic encoder. In view of this, the present utility model is proposed. Summary of the Utility Model

[0005] The technical problem to be solved by the present utility model is to overcome the deficiencies of the prior art and provide a coded optoelectronic speed sensor that can overcome or at least partially solve the above problems.

[0006] To solve the above technical problem, the basic idea of the technical solution adopted by the present utility model is:

[0007] An encoded photoelectric speed sensor includes a protective sleeve. An installation groove is formed in the protective sleeve, and a photoelectric encoder is inserted into the installation groove. It further includes: a sealing sleeve detachably connected to the protective sleeve; a fixing ring fixedly connected to the sealing sleeve and inserted into the protective sleeve. Wherein, the fixing ring is in close fit with the inner wall of the protective sleeve, a sealing ring is sleeved on the fixing ring, and the sealing ring is in close fit with the inner wall of the protective sleeve; a wrapping airbag is arranged around the inner wall of the protective sleeve. Wherein, a sealing groove for cooperating with the wrapping airbag is formed on the fixing ring; an air delivery pipe is arranged on the protective sleeve and is communicated with the wrapping airbag.

[0008] For controlling the opening or closing of the air delivery pipe, preferably, it further includes a valve switch arranged on the air delivery pipe.

[0009] For facilitating the installation and disassembly of the sealing sleeve and the protective sleeve, preferably, it further includes a plurality of fixing bolts, and the sealing sleeve is detachably connected to the protective sleeve through the plurality of fixing bolts.

[0010] Preferably, it further includes a connecting shaft rotatably connected to the sealing sleeve. The connecting shaft is detachably connected to the output end of the photoelectric encoder. Symmetrically fixed connections are arranged at one end of the connecting shaft passing through the sealing sleeve, and pin holes are formed on the connecting blocks.

[0011] For facilitating the rapid assembly of the output end of the photoelectric encoder and the connecting shaft, further, a connecting sleeve is fixedly connected to the output end of the photoelectric encoder, a plugging block is fixedly connected to one end of the connecting shaft, the plugging block is inserted into the connecting sleeve, a limiting convex block is fixedly connected to the plugging block, and a limiting groove corresponding to the limiting convex block is formed on the inner wall of the connecting sleeve.

[0012] For preventing damage to the photoelectric encoder by water and conductive dust, preferably, a wire passing hole communicated with the installation groove is formed on the protective sleeve, a rubber sleeve communicated with the wire passing hole is arranged on the protective sleeve, and the signal wire of the photoelectric encoder is led out through the wire passing hole and the rubber sleeve.

[0013] After adopting the above technical solution, the present utility model has the following beneficial effects compared with the prior art:

[0014] In the present utility model, by the fixing ring extruding the sealing ring to be in close fit with the inner wall of the protective sleeve, the sealing performance at the connection between the protective sleeve and the sealing sleeve is increased. And by making the wrapping airbag expand to be in close fit with the sealing groove, the sealing performance at the connection between the protective sleeve and the sealing sleeve is improved, avoiding water from entering the installation groove through the gap at the connection between the protective sleeve and the sealing sleeve and causing damage to the photoelectric encoder. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 is a cross-sectional view of the present utility model;

[0016] Figure 2 is the structural schematic diagram of the present utility model Figure 1 ;

[0017] Figure 3 is the structural schematic diagram of the present utility model Figure 2 ;

[0018] Figure 4 is the schematic diagram of the internal structure of the protective cover of the present utility model;

[0019] Figure 5 is the expanded structural schematic diagram of the connecting sleeve and the plug-in block of the present utility model;

[0020] Figure 6 is of the present utility model Figure 1 the enlarged view of part A in

[0021] In the figure: 1. Protective cover; 101. Installation groove; 102. Sealing sleeve; 103. Fixed bolt; 104. Rubber sleeve; 2. Photoelectric encoder; 201. Connecting sleeve; 202. Plug-in block; 203. Connecting shaft; 204. Connecting block; 205. Pin hole; 3. Fixed ring; 301. Sealing ring; 302. Wrapping airbag; 303. Air delivery pipe; 304. Valve switch. Detailed implementation manners

[0022] For the purpose of making the objectives, technical solutions and advantages of the embodiments of the present utility model clearer, the following will clearly and completely describe the technical solutions in the embodiments in conjunction with the accompanying drawings in the embodiments of the present utility model. The following embodiments are used to illustrate the present utility model but not to limit the scope of the present utility model.

[0023] Embodiment 1:

[0024] Referring to Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figure 5 , Figure 6 , a coded photoelectric speed sensor, comprising a protective cover 1, an installation groove 101 is formed in the protective cover 1, a photoelectric encoder 2 is inserted in the installation groove 101, and further comprising: a sealing sleeve 102 detachably connected to the protective cover 1; a fixed ring 3 fixedly connected to the sealing sleeve 102 and inserted into the protective cover 1 as described above, wherein the fixed ring 3 is in fit with the inner wall of the protective cover 1, a sealing ring 301 is sleeved on the fixed ring 3, and the sealing ring 301 is in fit with the inner wall of the protective cover 1; a wrapping airbag 302 disposed around the inner wall of the protective cover 1, wherein a sealing groove for cooperating with the wrapping airbag 302 is formed on the fixed ring 3; an air delivery pipe 303 disposed on the protective cover 1 and communicated with the wrapping airbag 302.

[0025] It further includes a connecting shaft 203 rotatably connected to the sealing sleeve 102. The connecting shaft 203 is detachably connected to the output end of the photoelectric encoder 2. Symmetrically fixed to one end of the connecting shaft 203 passing through the sealing sleeve 102 are connecting blocks 204, and pin holes 205 are formed in the connecting blocks 204.

[0026] A connecting sleeve 201 is fixedly connected to the output end of the photoelectric encoder 2. One end of the connecting shaft 203 is fixedly connected with a plug-in block 202. The plug-in block 202 is inserted into the connecting sleeve 201. A limiting convex block is fixedly connected to the plug-in block 202, and a limiting groove corresponding to the limiting convex block is formed in the inner wall of the connecting sleeve 201.

[0027] In specific implementation, the fixed ring 3 presses the sealing ring 301 to closely fit with the inner wall of the protective sleeve 1, thereby increasing the sealing performance at the connection between the protective sleeve 1 and the sealing sleeve 102. Then, an external booster pump (the output end of the booster pump is connected to the intake end of the air delivery pipe 303 through a flange) is connected. Subsequently, the booster pump is started. The booster pump sucks external gas and conveys it into the wrapping airbag 302 through the air delivery pipe 303, inflating and pressurizing the wrapping airbag 302. As a result, the wrapping airbag 302 expands and closely fits with the sealing groove, further increasing the sealing performance at the connection between the protective sleeve 1 and the sealing sleeve 102. In this way, the sealing performance at the connection between the protective sleeve 1 and the sealing sleeve 102 is improved, preventing water from entering the installation groove 101 through the gap at the connection between the protective sleeve 1 and the sealing sleeve 102 and causing damage to the photoelectric encoder 2. Then, the booster pump can be turned off.

[0028] When using this coded photoelectric speed sensor to detect a device to be detected, first, the connecting shaft 203 of the photoelectric encoder 2 is connected to the transmission shaft of the device to be detected by using a cylindrical pin in cooperation with the pin hole 205. Then, the device to be detected is started to drive the transmission shaft to rotate. At the same time, the transmission shaft drives the connecting shaft 203 to drive the photoelectric encoder 2 to rotate synchronously. Then, the photoelectric encoder 2 is powered on, and the photoelectric encoder 2 feeds back pulse signals, and then the detection work is carried out.

[0029] Embodiment 2:

[0030] Refer to Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 A coded photoelectric speed sensor is basically the same as that in Embodiment 1. Further, it further includes a valve switch 304, and the valve switch 304 is arranged on the air delivery pipe 303;

[0031] In specific implementation, due to the arrangement of the valve switch 304 on the air delivery pipe 303, when it is necessary to discharge the gas pressurized into the wrapping airbag 302, the gas in the wrapping airbag 302 can be discharged through the air delivery pipe 303 by opening the valve switch 304.

[0032] It further includes a plurality of fixing bolts 103, and the sealing sleeve 102 is detachably connected to the protective sleeve 1 through the plurality of fixing bolts 103;

[0033] In specific implementation, by setting the protective sleeve 1 and the sealing sleeve 102 to be detachable, it is convenient for the staff to disassemble and assemble the protective sleeve 1 and the sealing sleeve 102. Therefore, when the photoelectric encoder 2 needs to be maintained, it is convenient to take out the photoelectric encoder 2 from the installation groove 101 inside the protective sleeve 1 for maintenance.

[0034] Embodiment 3:

[0035] Refer to Figure 1 、 Figure 3 , a coded photoelectric speed sensor, which is basically the same as Embodiment 1. Further, a wire passing hole communicating with the installation groove 101 is formed on the protective sleeve 1, and a rubber sleeve 104 communicating with the wire passing hole is arranged on the protective sleeve 1. The signal wire of the photoelectric encoder 2 is led out through the wire passing hole and the rubber sleeve 104;

[0036] In specific implementation, through the setting of the rubber sleeve 104, the sealing performance at the connection between the signal wire of the photoelectric encoder 2 and the wire passing hole is increased, and water is prevented from entering the installation groove 101 through the gap at the connection between the signal wire and the wire passing hole to cause damage to the photoelectric encoder 2.

[0037] The above are only the preferred embodiments of the present invention, and do not impose any form of limitation on the present invention. Although the present invention has been disclosed above with the preferred embodiments, it is not intended to limit the present invention.

Claims

1. An encoded photoelectric speed sensor, comprising a protective sleeve (1), an installation groove (101) is formed in the protective sleeve (1), and a photoelectric encoder (2) is inserted into the installation groove (101), characterized in that, It further includes: A sealing sleeve (102) detachably connected to the protective sleeve (1); A fixing ring (3), fixedly connected to the sealing sleeve (102) and inserted into the protective sleeve (1) mentioned above, wherein, the fixing ring (3) is in contact with the inner wall of the protective sleeve (1), a sealing ring (301) is sleeved on the fixing ring (3), and the sealing ring (301) is in contact with the inner wall of the protective sleeve (1); A wrapping airbag (302), arranged around the inner wall of the protective sleeve (1), wherein, a sealing groove for cooperating with the wrapping airbag (302) is formed on the fixing ring (3); An air delivery pipe (303), arranged on the protective sleeve (1) and communicating with the wrapping airbag (302).

2. The coded optoelectronic speed sensor according to claim 1, characterized in that, It further includes a valve switch (304), and the valve switch (304) is arranged on the air delivery pipe (303).

3. The coded photoelectric speed sensor according to claim 1, characterized in that, It further includes a plurality of fixing bolts (103), and the sealing sleeve (102) is detachably connected to the protective sleeve (1) through the plurality of fixing bolts (103).

4. The coded photoelectric speed sensor according to claim 1, characterized in that, It further includes a connecting shaft (203) rotatably connected to the sealing sleeve (102), the connecting shaft (203) is detachably connected to the output end of the photoelectric encoder (2), symmetrically fixed connection blocks (204) are arranged at one end of the connecting shaft (203) passing through the sealing sleeve (102), and pin holes (205) are formed on the connecting blocks (204).

5. An encoded optoelectronic speed sensor according to claim 4, wherein, A connecting sleeve (201) is fixedly connected to the output end of the photoelectric encoder (2), a plugging block (202) is fixedly connected to one end of the connecting shaft (203), the plugging block (202) is inserted into the connecting sleeve (201), a limiting convex block is fixedly connected to the plugging block (202), and a limiting groove corresponding to the limiting convex block is formed on the inner wall of the connecting sleeve (201).

6. The encoded optoelectronic speed sensor according to claim 1, characterized in that, A wire passing hole communicating with the installation groove (101) is formed on the protective sleeve (1), a rubber sleeve (104) communicating with the wire passing hole is arranged on the protective sleeve (1), and the signal wire of the photoelectric encoder (2) is led out through the wire passing hole and the rubber sleeve (104).

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