Protection structure of rotating speed sensor

Abstract

The utility model discloses a protection structure of a rotating speed sensor, the protection structure of the rotating speed sensor comprises a base, a cylinder, two end covers, a transmission shaft, a measuring gear ring and a sensor main body, the cylinder is fixed on one side of the base, and the axial direction of the cylinder is the same as the width direction of the base; the two end covers are respectively arranged at the two ends of the cylinder body to seal the cylinder body; the transmission shaft penetrates through the two end covers, the axial direction of the transmission shaft coincides with the axial direction of the barrel, and the transmission shaft is rotationally connected with the end covers and has the freedom degree of rotating around the axial direction of the transmission shaft. The measuring gear ring sleeves the periphery of the transmission shaft and is positioned in the cylinder body; the sensor body is arranged on the periphery of the measuring gear ring and connected with the cylinder, and the sensor body extends in the radial direction of the transmission shaft. According to the protection structure of the rotating speed sensor, the rotating speed sensor can be installed more conveniently, and the service life is long.

Description

Technical Field

[0001] This application relates to the field of speed sensor technology, and in particular to a protection structure for a speed sensor. Background Technology

[0002] A speed sensor is a sensor that converts the rotational speed of a rotating object into an electrical output; it belongs to the category of indirect measurement devices.

[0003] The speed sensor mainly consists of a sensor body. When performing a measurement, a measuring gear ring needs to be fitted onto the shaft to be measured, and then the sensor body is installed so that the sensor body is located on the outer circumference of the measuring gear ring and maintains a certain distance from the measuring gear ring for measurement.

[0004] The aforementioned measuring gear ring is often exposed, making it easy for hard objects such as stones to get stuck on it. These hard objects can easily collide with the sensor body, causing damage to the sensor body and making it inconvenient to use. Utility Model Content

[0005] The main purpose of this application is to provide a protection structure for a speed sensor, which aims to solve the problem that traditional speed sensors are prone to damage.

[0006] To achieve the above objectives, this application provides a protective structure for a speed sensor. The protective structure includes a base, a cylindrical body, two end caps, a drive shaft, a measuring gear ring, and a sensor body. The cylindrical body is fixed to one side of the base, and its axial direction is the same as the width direction of the base. The two end caps are respectively disposed at both ends of the cylindrical body to seal it. The drive shaft passes through the two end caps and its axial direction coincides with the axial direction of the cylindrical body. The drive shaft is rotatably connected to the end caps and has a degree of freedom to rotate about its own axial direction. The measuring gear ring is sleeved on the outer periphery of the drive shaft and located inside the cylindrical body. The sensor body is disposed on the outer periphery of the measuring gear ring and connected to the cylindrical body, and the sensor body extends radially along the drive shaft.

[0007] Optionally, each of the two end caps is provided with a through hole; the protection structure of the speed sensor also includes two bearings, which are respectively fixed to the inner circumference of one of the through holes and are both sleeved on the outer circumference of the drive shaft.

[0008] Optionally, the protective structure of the speed sensor further includes a rotating cylinder, a positioning rod, and a positioning plate. The rotating cylinder passes through the side wall of the cylinder body and its axial direction is the same as the radial direction of the drive shaft. The rotating cylinder is rotatably connected to the cylinder body and has the freedom to rotate about its own axial direction. The sensor body passes through the rotating cylinder and is threadedly connected to the rotating cylinder. The positioning rod passes through the side wall of the cylinder body and its extension direction is the same as the axial direction of the rotating cylinder. The positioning rod is slidably connected to the cylinder body and has the freedom to slide along its own extension direction. The positioning plate is disposed at one end of the positioning rod located inside the cylinder body and is fixed to the sensor body.

[0009] Optionally, there are two positioning rods arranged opposite each other on the outer periphery of the rotating drum.

[0010] Optionally, the inner circumference of the cylinder is provided with an internal thread, and the outer circumference of the end cap is provided with an external thread, and the end cap is threadedly connected to the cylinder; the inner circumference of the cylinder is provided with a groove to accommodate the positioning piece and the sensor body located at one end of the cylinder, wherein the external threads on the two end caps have the same direction of rotation.

[0011] Optionally, the protection structure of the speed sensor also includes multiple fixed shafts, all of which are fixed between the two end caps and located on the outer periphery of the measuring gear ring.

[0012] Optionally, the protection structure of the speed sensor further includes multiple paddles, which are respectively fixed to the opposite sides of the two end caps; wherein the paddles extend radially along the drive shaft.

[0013] Optionally, on the same end cap, there are two paddles disposed opposite each other on the outer periphery of the drive shaft.

[0014] Optionally, the paddles on the two end caps correspond one-to-one, and the paddles are arranged opposite each other in the axial direction of the drive shaft.

[0015] Optionally, in the axial direction of the drive shaft, the width of the measuring gear ring is greater than the width of the sensor body.

[0016] This application proposes a protective structure for a speed sensor. During use, the base is fixed, and a drive shaft is connected to the shaft under test via a coupling. When the shaft under test rotates, it drives the drive shaft to rotate, which in turn drives the measuring gear ring to rotate. The sensor body, in conjunction with the measuring gear ring, measures the speed of the drive shaft. The speed of the shaft under test is the same as the speed of the drive shaft, thus allowing the measurement of the shaft's speed. Both the measuring gear ring and the probe portion of the sensor body are located within a cylindrical body, sealed at both ends by end caps. This effectively isolates the measuring gear ring, preventing hard objects from embedding in it and impacting the sensor body, thereby improving the service life of both the sensor body and the measuring gear ring. Furthermore, since the sensor body and the measuring gear ring are integrated, there is no need to control the distance between them, making installation more convenient. Attached Figure Description

[0017] To more clearly illustrate the prior art and the present invention, the accompanying drawings used in the description of the prior art and the embodiments of the present invention will be briefly introduced below. Obviously, the drawings described below are merely exemplary, and those skilled in the art can derive other drawings from the provided drawings without any creative effort.

[0018] The structures, proportions, sizes, etc. illustrated in this specification are only for the purpose of assisting those skilled in the art in understanding and reading the content disclosed herein, and are not intended to limit the conditions under which this utility model can be implemented. Any modifications to the structure, changes in the proportions, or adjustments to the size, without affecting the effects and purposes that this utility model can produce, should still fall within the scope of the technical content disclosed in this utility model.

[0019] Figure 1 This is a schematic diagram of the overall structure of a protection structure for a speed sensor proposed in an embodiment of this application;

[0020] Figure 2 for Figure 1 A structural schematic diagram from another perspective of the embodiment;

[0021] Figure 3 for Figure 1 A structural breakdown diagram of the Chinese embodiment;

[0022] Figure 4 This is a schematic diagram of the structure of one end cap after it has been rotated out of the cylinder in one embodiment of this application;

[0023] Figure 5 This is a schematic diagram of the groove structure in an embodiment of this application.

[0024] In the diagram: 1. Base; 2. Cylinder; 21. Groove; 3. End cap; 31. Bearing; 32. Fixed shaft; 33. Paddle; 4. Drive shaft; 5. Measuring gear ring; 6. Sensor body; 71. Rotary cylinder; 72. Positioning rod; 73. Positioning plate.

[0025] The realization of the purpose, functional features and advantages of this application will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0026] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0027] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0028] In this utility model, unless otherwise explicitly specified and limited, the terms "connection" and "fixation" should be interpreted broadly. For example, "fixation" can mean a fixed connection, a detachable connection, or an integral part; it can mean a mechanical connection or an electrical connection; it can mean a direct connection or an indirect connection through an intermediate medium; it can mean the internal communication of two components or the interaction between two components, unless otherwise explicitly limited. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0029] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features. Additionally, the meaning of "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0030] The present application will now be described in detail with reference to the accompanying drawings and embodiments.

[0031] Figure 1 This is a schematic diagram of the overall structure of a protection structure for a speed sensor proposed in an embodiment of this application; Figure 2 for Figure 1 A structural schematic diagram from another perspective of the embodiment; Figure 3 for Figure 1 A structural breakdown diagram of the Chinese embodiment; Figure 4 This is a schematic diagram of the structure of one end cap after it has been rotated out of the cylinder in one embodiment of this application; Figure 5 This is a schematic diagram of the groove structure in an embodiment of this application.

[0032] Among them, Figure 3 In the middle, the end cap 3, bearing 31, paddle 33 and fixed shaft 32 are removed from the cylinder 2.

[0033] refer to Figures 1-5 It should be understood that Figure 3 The connections between the various components should be like Figure 2 As compact as in the middle, this is only for illustrative purposes and will Figure 2 The components are shown disassembled for easier understanding. This application provides a protective structure for a speed sensor. The protective structure may include a base 1, a cylinder 2, two end caps 3, a drive shaft 4, a measuring gear ring 5, and a sensor body 6. The cylinder 2 is fixed to one side of the base 1 and its axial direction is the same as the width direction of the base 1. The two end caps 3 are respectively disposed at both ends of the cylinder 2 to seal the cylinder 2. The drive shaft 4 passes through the two end caps 3 and its axial direction coincides with the axial direction of the cylinder 2. The drive shaft 4 is rotatably connected to the end caps 3 and has the freedom to rotate around its own axial direction. The measuring gear ring 5 is sleeved on the outer periphery of the drive shaft 4 and located inside the cylinder 2. The sensor body 6 is disposed on the outer periphery of the measuring gear ring 5 and connected to the cylinder 2. The sensor body 6 extends radially along the drive shaft 4.

[0034] The protective structure for a speed sensor proposed in this application involves fixing a base 1 and connecting a drive shaft 4 to the shaft under test via a coupling. When the shaft under test rotates, it drives the drive shaft 4 to rotate, which in turn drives the measuring gear ring 5 to rotate. The sensor body 6 then works in conjunction with the measuring gear ring 5 to measure the speed of the drive shaft 4. The speed of the shaft under test is the same as the speed of the drive shaft 4, thus allowing the measurement of the speed of the shaft under test. Both the measuring gear ring 5 and the probe portion of the sensor body 6 are located inside the cylinder 2, which is sealed at both ends by end caps 3. This effectively isolates the measuring gear ring 5, preventing hard objects from getting stuck on it and impacting the sensor body 6, thereby improving the service life of both the sensor body 6 and the measuring gear ring 5. Furthermore, since the sensor body 6 and the measuring gear ring 5 are integrated, there is no need to control the distance between them, making installation more convenient.

[0035] The sensor body 6 is the main part of the speed sensor, which can be used in conjunction with the measuring gear ring 5 to measure the speed of the drive shaft 4. The sensor body 6 can be connected to an external power source.

[0036] refer to Figure 2 and Figure 3 In an exemplary embodiment, each of the two end caps 3 is provided with a through hole; the protection structure of the speed sensor may also include two bearings 31, which are respectively fixed to the inner circumference of a through hole and are both sleeved on the outer circumference of the drive shaft 4.

[0037] Specifically, such as Figure 3 As shown, a through hole is provided in the central area of ​​the end cap 3, and a bearing 31 is connected to the inner circumference of the through hole, such as... Figure 2 As shown, bearing 31 is sleeved on the outer circumference of transmission shaft 4, so that transmission shaft 4 can rotate around its own axis. Bearing 31 is a cylindrical roller bearing.

[0038] refer to Figure 3 In an exemplary embodiment, the protective structure of the speed sensor may further include a rotating cylinder 71, a positioning rod 72, and a positioning plate 73. The rotating cylinder 71 penetrates the side wall of the cylinder 2 and its axial direction is the same as the radial direction of the drive shaft 4. The rotating cylinder 71 is rotatably connected to the cylinder 2 and has the degree of freedom to rotate about its own axial direction. The sensor body 6 passes through the rotating cylinder 71 and is threadedly connected to the rotating cylinder 71. The positioning rod 72 penetrates the side wall of the cylinder 2 and its extension direction is the same as the axial direction of the rotating cylinder 71. The positioning rod 72 is slidably connected to the cylinder 2 and has the degree of freedom to slide along its own extension direction. The positioning plate 73 is disposed at one end of the positioning rod 72 located inside the cylinder 2 and is fixed to the sensor body 6.

[0039] Specifically, for ease of explanation, the axial direction of the rotating drum 71 is referred to as the first direction. The rotating drum 71 can rotate around the first direction, and the positioning rod 72 can slide along the first direction. The positioning rod 72 is connected to the sensor body 6 through the positioning piece 73, and the sensor body 6 is screwed to the inner circumference of the rotating drum 71. Thus, when the rotating drum 71 rotates, it can drive the sensor body 6 to slide along the first direction, further adjusting the distance between the sensor body 6 and the measuring gear ring 5. In other words, the distance between the sensor body 6 and the measuring gear ring 5 can be adjusted by rotating the rotating drum 71, making it more convenient to use.

[0040] refer to Figure 3 In an exemplary embodiment, there are two positioning rods 72, which are disposed opposite to each other on the outer periphery of the rotating cylinder 71.

[0041] Specifically, the more positioning rods 72 there are, the more stable the sliding process of the sensor body 6 will be. However, a large number of positioning rods 72 will affect the operator's rotation of the rotating drum 71. In the preferred embodiment, there are two positioning rods 72 and they are arranged opposite each other on the outer periphery of the rotating drum 71. In this way, the sliding process of the sensor body 6 is more stable, and the operator can pinch and rotate the rotating drum 71 from both sides. The rotation of the rotating drum 71 is hardly affected, making it more convenient to use.

[0042] refer to Figure 4 and Figure 5 In an exemplary embodiment, the inner circumference of the cylinder 2 is provided with an internal thread, and the outer circumference of the end cap 3 is provided with an external thread. The end cap 3 is threadedly connected to the cylinder 2. The inner circumference of the cylinder 2 is provided with a groove 21 to accommodate the positioning piece 73 and one end of the sensor body 6 located inside the cylinder 2. The external threads on the two end caps 3 have the same direction of rotation.

[0043] Specifically, since the end caps 3 are threadedly connected to the cylinder 2, and the external threads on both end caps 3 have the same direction of rotation, the two end caps 3 can be rotated around the axial direction of the cylinder 2 to remove the two end caps 3, the drive shaft 4, and the measuring gear ring 5 from the cylinder 2. Figure 4 As shown, at this time, one end cap 3 has been rotated out of the cylinder 2, and the other end cap 3 has been rotated from one end of the cylinder 2 to the other end of the cylinder 2 but has not yet been rotated out of the cylinder 2. This makes it easier to maintain the measuring gear ring 5 and the sensor body 6.

[0044] It should be understood that, such as Figure 5 As shown, the inner circumference of the cylinder 2 is provided with a groove 21 to accommodate the positioning piece 73 and the sensor body 6 located inside the cylinder 2. That is, by rotating the rotating cylinder 71, the sensor body 6 and the positioning piece 73 can be moved, so that the positioning piece 73 and the sensor body 6 located inside the cylinder 2 are both located in the groove 21. Thus, the end cap 3 will not be blocked by the sensor body 6 and the positioning piece 73 during the process of rotating from one end of the cylinder 2 to the other end of the cylinder 2.

[0045] It should be noted that when both end caps 3 are screwed to the cylinder 2, both end caps 3 should be rotated simultaneously so that the two end caps 3, the two bearings 31, the drive shaft 4, and the measuring gear ring 5 move synchronously until one end cap 3 is detached from the cylinder 2, and then the other end cap 3 can be rotated.

[0046] refer to Figure 3 and Figure 4 In an exemplary embodiment, the protective structure of the speed sensor may further include multiple fixed shafts 32, which are all fixed between the two end caps 3 and located on the outer periphery of the measuring gear ring 5.

[0047] Specifically, the two end caps 3 are fixed together by multiple fixed shafts 32, so that rotating one end cap 3 will drive the other end cap 3 to rotate synchronously via the fixed shafts 32, facilitating the simultaneous rotation of both end caps 3; in addition, as Figure 4 As shown, when one end cap 3 rotates out of the cylinder 2, the other end cap 3 is located inside the cylinder 2. At this time, the end cap 3 located outside the cylinder 2 can be rotated to drive the other end cap 3 to rotate. This makes it more convenient to rotate the end cap 3 located inside the cylinder 2.

[0048] refer to Figure 2 In an exemplary embodiment, the protection structure of the speed sensor may further include a plurality of paddles 33, which are respectively fixed to the opposite sides of the two end caps 3; wherein the paddles 33 extend radially along the drive shaft 4.

[0049] Specifically, such as Figure 2 As shown, the paddle 33 extends radially along the drive shaft 4. By prying the paddle 33, the end cap 3 can be rotated axially around the cylinder 2, making it more convenient to screw in or out the end cap 3.

[0050] refer to Figure 4 In an exemplary embodiment, there are two paddles 33 on the same end cap 3, which are disposed opposite to each other on the outer periphery of the drive shaft 4.

[0051] Among them, such as Figure 4 As shown, there are two paddles 33 on the same end cap 3, which are arranged opposite each other on the outer periphery of the drive shaft 4. In this way, the operator can rotate the end cap 3 by pressing and pushing one paddle 33 with his thumb and forefinger respectively, making it more convenient to use.

[0052] In an exemplary embodiment, the paddles 33 on the two end caps 3 correspond one-to-one, and the corresponding paddles 33 are arranged opposite each other in the axial direction of the drive shaft 4.

[0053] Specifically, when both end caps 3 are screwed into the cylinder 2, the friction between the two end caps 3 and the cylinder 2 is relatively large. At this time, the operator can simultaneously move the paddles 33 on the two end caps 3 with both hands to drive the two end caps 3 to rotate at the same time, which makes it more convenient to apply force.

[0054] Furthermore, the paddles 33 on the two end caps 3 correspond one-to-one, and the corresponding paddles 33 are axially opposite each other on the drive shaft 4. In this way, when the operator applies force, the two hands are opposite each other and rotate synchronously to drive the two end caps 3 to rotate. The synchronous movement of the two hands is more in line with human habits and the operation is more convenient.

[0055] In an exemplary embodiment, the width of the measuring gear ring 5 is greater than the width of the sensor body 6 in the axial direction of the drive shaft 4.

[0056] Specifically, the sensor body 6 is cylindrical, and its width is its diameter. The axial direction of the drive shaft 4 is denoted as the second direction. It should be understood that the process of screwing the two end caps 3 into the cylinder 2 is prone to certain errors, which will cause the position of the measuring gear ring 5 in the second direction to change. When the width of the measuring gear ring 5 is greater than the diameter of the sensor body 6, even if the position of the measuring gear ring 5 in the second direction changes, the sensor body 6 can still be located on the outer periphery of the measuring gear ring 5 and cooperate with the measuring gear ring 5 to measure the rotational speed.

[0057] The above are merely preferred embodiments of this application and do not limit the patent scope of this application. Any equivalent structural or procedural transformations made using the content of this application's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of this application.

Claims

1. A protective structure of a rotational speed sensor, characterized by comprising: The application relates to a rotational speed sensor protection structure. The application relates to a rotational speed sensor protection structure. The application relates to a rotational speed sensor protection structure. The application relates to a rotational speed sensor protection structure. The application relates to a rotational speed sensor protection structure. The application relates to a rotational speed sensor protection structure. The application relates to a rotational speed sensor protection structure.

2. The protection structure for a rotational speed sensor according to claim 1, wherein The application relates to a rotational speed sensor protection structure. The application relates to a rotational speed sensor protection structure.

3. The protection structure for a rotational speed sensor according to claim 1, wherein The application relates to a rotational speed sensor protection structure. The application relates to a rotational speed sensor protection structure. The application relates to a rotational speed sensor protection structure. The application relates to a rotational speed sensor protection structure.

4. The protection structure for a rotational speed sensor according to claim 3, wherein The application relates to a rotational speed sensor protection structure.

5. The protection structure for a rotational speed sensor according to claim 3, wherein The application relates to a rotational speed sensor protection structure. The application relates to a rotational speed sensor protection structure. The application relates to a rotational speed sensor protection structure.

6. The protective structure for a rotational speed sensor according to claim 5, wherein The application relates to a rotational speed sensor protection structure. The application relates to a rotational speed sensor protection structure.

7. The protective structure for a rotational speed sensor according to claim 1, wherein The application relates to a rotational speed sensor protection structure. The application relates to a rotational speed sensor protection structure. The application relates to a rotational speed sensor protection structure.

8. The rotational speed sensor protection structure according to claim 7, wherein The application relates to a rotational speed sensor protection structure.

9. The rotational speed sensor protection structure according to claim 7, wherein The application relates to a rotational speed sensor protection structure.

10. The protective structure for a rotational speed sensor according to claim 1, wherein The application relates to a rotational speed sensor protection structure. The application relates to a rotational speed sensor protection structure. The application relates to a rotational speed sensor protection structure. The application relates to a rotational speed sensor protection structure. The application relates to a rotational speed sensor protection structure. The application relates to a rotational speed sensor protection structure. The application relates to a rotational speed sensor protection structure. The application relates to a rotational speed sensor protection structure. The application relates to a rotational speed sensor protection structure. The application relates to a rotational speed sensor protection structure. The application relates to a rotational speed sensor protection structure. The application relates to a rotational speed sensor protection structure. 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